Valent VIVE / VIV Modular Dedicated Outdoor Air Unit

General Safety Information

Only qualified personnel should install this system. Personnel should have a clear understanding of these instructions and be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity are present. If more information is needed, contact a licensed professional engineer before moving forward.

1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC), the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electric Code (CEC) in Canada.
2. All moving parts must be free to rotate without striking or rubbing any stationary objects.
3. Unit must be securely and adequately grounded.
4. Do not spin fan wheel faster than maximum cataloged fan RPM. Adjustments to fan speed significantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.
5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces or chemicals. Replace cord immediately if damaged.
6. Verify that the power source is compatible with the equipment.
7. Never open access doors to the unit while it is running.

DANGER: Always disconnect power before working on or near a unit. Lock and tag the disconnect switch or breaker to prevent accidental power up.

WARNING: For A2L appliance only. LEAK DETECTION SYSTEM installed. Unit must be powered except for service.

WARNING: This unit is equipped with electrically powered safety measures. To be effective, the unit must be electrically powered at all times after installation, other than when servicing.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.

CAUTION: When servicing the unit, motor may be hot enough to cause pain or injury. Allow motor to cool before servicing.

CAUTION: This unit is equipped with a compressed refrigerant system. If a leak in the system should occur, immediately evacuate and ventilate the area. An EPA Certified Technician must be engaged to make repairs or corrections. Refrigerant leaks may also cause bodily harm.

IMPORTANT: All factory provided lifting lugs must be used when lifting any unit. Failure to comply with this safety precaution could result in property damage, serious injury or death.

FOR YOUR SAFETY: This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

FOR YOUR SAFETY: MAXIMUM ALTITUDE: 11154 FT OR 3400 M

Unit Overview

Summer Operation

Outdoor air is preconditioned (temperature and moisture levels are decreased) by the transfer of energy from the cooler, drier exhaust air via the energy recovery wheel. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Exhaust Air: Outdoor Air 95°F, 117 grains/lb.

Supply Air: Room Air 75°F, 50% RH; Supply Air 79°F, 75 grains/lb.

Winter Operation

Outdoor air is preconditioned (temperature and moisture levels are increased) by the transfer of energy from the warmer, more humid exhaust air via the energy recovery wheel. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Exhaust Air: Outdoor Air 10°F, 5 grains/lb.

Supply Air: Room Air 72°F, 40% RH; Supply Air 60°F, 39 grains/lb.

Receiving, Handling and Storage

Receiving

This product may have been subject to road salt during transit. If so, immediately wash off all visible white residue from all exterior surfaces. Upon receiving the product, check to ensure all items are accounted for by referencing the delivery receipt or packing list. Inspect each crate or carton for shipping damage before accepting delivery. Alert the carrier if any damage is detected; do not refuse shipment. The customer shall make notation of damage (or shortage of items) on the delivery receipt and all copies of the bill of lading which should be countersigned by the delivering carrier. If damaged, immediately contact your manufacturer's representative. Any physical damage to the unit after acceptance is not the responsibility of the manufacturer.

Handling

Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used. Location of brackets varies by model and size. Handle in such a manner as to keep from scratching or chipping the coating. Damaged finish may reduce ability of unit to resist corrosion.

Unpacking

Verify that all required parts and the correct quantity of each item have been received. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space. Confirmation of shipment(s) must be limited to only items on the bill of lading.

Storage

Units are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the unit and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user.

The ideal environment for the storage of units and accessories is indoors, above grade, in a low humidity atmosphere which is sealed to prevent the entry of blowing dust, rain, or snow. Units designed for outdoor applications may be stored outdoors. All accessories must be stored indoors in a clean, dry atmosphere.

Indoor

Do not store outdoors or in a wet location. This unit is intended for indoor use only. Improper storage which results in damage to the product will void the warranty. Maintain temperatures evenly to prevent condensation. Remove any accumulations of dirt, water, ice, or snow and wipe dry before moving to indoor storage. To avoid condensation, allow cold parts to reach room temperature. Leave coverings loose to permit air circulation and to allow for periodic inspection.

The unit should be stored at least 3 1/2 in. (89 mm) off the floor. Clearance should be provided to permit air circulation and space for inspection.

Inspection and Maintenance (During Storage)

While in storage, inspect units once per month. Keep a record of inspection and maintenance performed.

If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rotate the fan wheel by hand ten to fifteen revolutions to distribute lubricant on motor. If paint deterioration begins, consideration should be given to touch-up or repainting. Units with special coatings may require special techniques for touch-up or repair.

Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface with crocus cloth or fine emery paper and oil. Do not destroy the continuity of the surfaces. Wipe thoroughly clean with Tectyl® 506 (Ashland Inc.) or the equivalent. For hard to reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive, WD-40® or the equivalent.

Removing from Storage

As units are removed from storage to be installed in their final location, they should be protected and maintained in a similar fashion until the equipment goes into operation.

Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.

1. Check all fasteners, set screws on the fan, wheel, bearings, drive, motor base, and accessories for tightness.
2. Rotate the fan wheel(s) by hand and assure no parts are rubbing.

Model Number Code

The model number code provides basic identification of the unit. The serial number can be used by the manufacturer's representative or the factory to identify the specific unit configuration. The serial number of the unit must be provided when consulting the manufacturer's representative or the factory.

Model Family: VIVE - Indoor Ventilator Wheel, VIV - Indoor Ventilator

Housing Size: 1 - 500 to 1,500 cfm, 2 - 1,000 to 2,500 cfm

Tonnage: 2 - 2 Ton Single, 3 - 3 Ton Single, 4 - 4 Ton Single, 5 - 5 Ton Single, 14 - 14 Ton Single

Heating Type: H - Electric Heat, 0 - ASHP/None

Energy Recovery Characteristic: HF - High Flow, HE - High Effectiveness

Cooling Type: HP - ASHP, DX - Split DX, 0 - None

Orientation: E - Ends, H - Horizontal, S - Sides

Discharge: R - Right, L - Left

Access: R - Right, L - Left

RANGE OF EXTERNAL STATIC PRESSURES: 0.00 - 4.00 IN.W.C. OR 0.000 - 0.995 KPA

Installation

This unit is suitable for INDOOR installation ONLY.

WARNING: If appliances connected via an air duct system to one or more rooms with A2L REFRIGERANTS are installed in a room with an area less than the minimum room area shown in the following tables, that room shall be without continuously operating open flames (e.g. an operating gas appliance) or other POTENTIAL IGNITION SOURCES (for example an operating electric heater, hot surfaces). A flame-producing device may be installed in the same space if the device is provided with an effective flame arrest. Additional ventilation is required in accordance with ASHRAE 15.

WARNING: Warning, for appliances using A2L refrigerants connected via an air duct system to one or more rooms, minimum circulation airflow is required to prevent refrigerant stagnation in the event of a refrigerant leak. Open all VAV appliances or zoning dampers to allow for airflow at or above the minimum airflow shown in the following tables.

WARNING: For appliances using A2L refrigerants connected via an air duct system to one or more rooms of insufficient floor space as determined in the following tables, additional ventilation is required in accordance with ASHRAE 15.

WARNING: For appliances using A2L REFRIGERANTS connected via an air duct system to one or more rooms, Auxiliary devices which may be a POTENTIAL IGNITION SOURCE shall not be installed in the duct work. Examples of such POTENTIAL IGNITION SOURCES are hot surfaces with a temperature exceeding 700°C and electric switching devices.

WARNING: For appliances using A2L refrigerants connected via an air duct system to one or more rooms, only auxiliary devices approved by the appliance manufacturer or declared suitable with the refrigerant shall be installed in connecting ductwork.

WARNING: For duct connected appliances, false ceilings or drop ceilings may be used as a return air plenum if any external connections are also provided with a refrigerant sensor immediately below the return air plenum duct joint.

WARNING: Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater. Do not pierce or burn. Be aware that refrigerants may not contain an odor.

Installation Requirements

Where minimum room areas, minimum airflows and conditioned space areas are defined, the following tables can be utilized to verify the installation in accordance with the releasable charge within a unit. Ensure that the correct table is referenced for the refrigerant utilized in the appliance.

Note: The releasable charge is the maximum refrigerant charge of one circuit within an appliance when more than one circuit is present. An example of a two-circuit system would be a charge of 10 pounds (4.53 kg) in circuit A and a charge of 20 pounds (9.06 kg) in circuit B. The releasable charge of this appliance would be 20 pounds (9.06 kg).

Ensure all national, provincial and local safety codes are followed when installing this equipment including considerations for the installed location and building occupancy classification.

Service Clearances

All units require minimum clearances to perform routine maintenance, such as filter replacement, energy wheel cassette inspection, and fan inspection. Blower and motor assemblies, energy recovery wheel cassette and filter sections are always provided with a service door or panel for proper component access.

All dimensions are in inches.

Ductwork

Recommended duct sizes are only intended to be a guide and may not satisfy the requirements of the project. Refer to plans for appropriate job specific duct size and/or velocity limitations. Attach ducts to the unit with flexible adapters to isolate the ductwork from any possible vibration. Follow good duct practices for all ductwork. Install ductwork in accordance with SMACNA and AMCA guidelines, NFPA 96 and local codes.

Combustible Clearances

Clearance to combustibles is defined as the minimum distance required between the heater and adjacent combustible surfaces to ensure the adjacent surface's temperature does not exceed 90 degrees above the ambient temperature.

Handling

While this unit was constructed with quality and dependability in mind, damage still may occur during handling of the unit for installation. Exercise extreme caution to prevent any damage from occurring to the refrigerant system.

The system design and installation should follow accepted industry practice, such as described in the ASHRAE Handbook. Adequate space should be left around the unit for piping coils and drains, filter replacement, and maintenance. Sufficient space should be provided on the side of the unit for routine service and component removal should that become necessary.

Lifting

WARNING: All factory provided lifting lugs must be used when lifting the unit. Failure to comply with this safety precaution could result in property damage, serious injury or death.

1. Before lifting, be sure that all shipping material has been removed from unit.
2. To assist in determining rigging requirements, refer to the submittal for unit weights.
3. Each individual module must be supported when lifting the unit.
4. Rigger to use suitable mating hardware to attach to unit corner lifting points.
5. If the unit is hoisted, use spreader bars to prevent damage to the unit by the lifting cables.
6. Always test-lift the unit to check for proper balance and rigging before hoisting to desired location.
7. Install all doors when handling the unit to prevent damage.

Installation of Electrical Wiring

WARNING: To prevent injury or death due to electrocution or contact with moving parts, lock disconnect switch in the off position.

IMPORTANT: Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached on the inside of the control center door(s).

IMPORTANT: All wiring should be done in accordance with the latest edition of the National Electric Code ANSI/NFPA 70 and any local codes that may apply. In Canada, wiring should be done in accordance with the Canadian Electrical Code.

IMPORTANT: The equipment must be properly grounded. Any wiring running through the unit in the airstream must be secured and protected from sharp edges.

CAUTION: If replacement wire is required, it must have a temperature rating of at least 105°C, except for an energy cut-off or sensor lead wire which must be rated to 150°C.

DANGER: High voltage electrical input is needed for this equipment. This work should be performed by a qualified electrician.

CAUTION: Any wiring deviations may result in personal injury or property damage. Manufacturer is not responsible for any damage to, or failure of the unit caused by incorrect final wiring.

IMPORTANT: Manufacturer's standard control voltage is 24 VAC. Control wire resistance should not exceed 0.75 ohms (approximately 285 feet total length for 14 gauge wire; 455 feet total length for 12 gauge wire). If the resistance exceeds 0.75 ohms, an industrial-style plug-in relay should be wired in place of the remote switch. The relay must be rated for at least 5 amps and have a 24 VAC coil. Failure to comply with these guidelines may cause motor starters to chatter or not pull in, resulting in contactor failures and/or motor failures.

Hanging Instructions

The unit should be hung by the factory supplied mounting brackets. The mounting brackets can be attached to the top or bottom of the unit. There should be a minimum of (2) mounting points per module. The mounting points should line up on the opposing side to evenly support the unit. The unit can be supported from the bottom and “trapeze mounted”. When trapeze mounting the unit, there should be a minimum of (2) mounting points per module. Refer to the submittal for unit weights. Always mount the unit level to ensure proper operation.

Floor Mounting

Mount the unit on a level and dry surface with adequate support under each module. Fasten the unit using appropriate methods. The installer is responsible for determining appropriate support and fastening methods to ensure compliance with all applicable codes.

Electrical Connection

Determine the Size of the Main Power Lines: The unit's nameplate states the voltage and the unit's MCA. The main power lines to the unit should be sized accordingly. The nameplate is located on the outside of the unit on the control panel side.

Provide the Opening(s) for the Electrical Connection: Electrical openings vary by unit size and arrangement and are field-supplied.

Connect the Main Power: Connect the main power lines to the disconnect switch and main grounding lug(s). Torque field connections to 20 in.-lbs.

Effect of Low Voltage on Wattage and British Thermal Unit (BTU)

The heating elements may be used on voltages lower than the design voltage of the heater, however, the wattage and BTU output will be reduced to the percentages listed in the table below.

Typical Control Center Components:

1. Microprocessor Controller
2. Relays
3. Dirty Filter Pressure Switches
4. Low Voltage Terminals
5. Energy Recovery Wheel VFD
6. 24 VAC Control Transformer
7. Current Switch
8. Distribution Block

Refrigeration System Service Requirements

CAUTION: Do not mix air or gas other than the specified refrigerant used in the system.

CAUTION: If the refrigerant gas leaks during the installation, ventilate the area immediately.

CAUTION: Dismantling the unit, treatment of the refrigerant oil and eventual parts should be done in accordance with local and national standards.

CAUTION: Refrigerant tubing shall be protected or enclosed to avoid damage.

CAUTION: Flexible refrigerant connectors (such as connecting lines between an indoor and outdoor unit) that may be displaced during normal operations shall be protected against mechanical damage.

CAUTION: The installation of pipe work shall be kept to a minimum.

CAUTION: A brazed, welded, or mechanical connection shall be made before opening the valves to permit refrigerant to flow between refrigerating system parts.

CAUTION: Pipe-work including piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance with national and local codes and standards, such as ASHRAE 15, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. All field joints shall be accessible for inspection prior to being covered or enclosed.

CAUTION: If the refrigerant gas leaks during the repair, do not touch the leaking refrigerant gas.

WARNING: Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry-recognized assessment specification.

WARNING: Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater. Do not pierce or burn. Be aware that refrigerants may not contain an odor.

WARNING: Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

WARNING: Ducts connected to an appliance shall not contain a potential ignition source.

WARNING: Equipment with A2L refrigerants connected via an air duct system to one or more rooms that are installed in a room with an area less than Amin (as shown in the tables in this manual), that room shall be without continuously operating open flames (for example an operating gas appliance) or other potential ignition sources (for example an operating electric heater, hot surfaces). A flame-producing device may be installed in the same space if the device is provided with an effective flame arrest.

WARNING: For installations with field applied mechanical joints which are exposed in the occupied space, a sensor shall be remote located within 6 feet (2 meters) horizontal distance in line of sight of the unit and on a wall within the room in which the unit is installed, at a height not to exceed:

• 3.9 inches (100 mm) above the floor where the condensate drain line is not more than 11.8 inches (300 mm) from the floor; or
• 11.8 inches (300 mm) above the floor where the condensate drain line is more than 11.8 inches (300 mm) from the floor.

WARNING: Auxiliary devices which may be a potential ignition source shall not be installed in the duct work. Examples of such potential ignition sources are hot surfaces with a temperature exceeding 700°C and electric switching devices.

WARNING: Only auxiliary devices approved by the appliance manufacturer or declared suitable with the refrigerant shall be installed in connecting ductwork.

WARNING: Keep any required ventilation openings clear of obstruction.

WARNING: Mechanical connections shall be accessible for maintenance purposes.

WARNING: Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

WARNING: The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).

WARNING: Do not pierce or burn.

WARNING: Be aware that refrigerants may not contain an odor.

WARNING: When mechanical connectors are reused indoors, sealing parts shall be replaced.

WARNING: When flared joints are reused indoors, the flare part shall be re-fabricated.

WARNING: The maximum R-454B or R32 refrigerant charge shall not exceed 169lbs (76.65 kg).

The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect installation, maintenance and operation of unit(s) that contain refrigerants classified as safety group A2L.

Qualification of Workers

This manual contains specific information about the required qualification of the working personnel for maintenance, service, and repair operations. Every working procedure that affects safety means shall only be carried out by competent persons.

Examples for such working procedures are:

• Breaking into the refrigerating circuit(s).
• Opening of sealed component(s).
• Opening of ventilated enclosure(s).

Checks to the Area

Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.

Work Procedure

Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being present while the work is being performed.

General Work Area

All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided.

Check for Presence of Refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

Presence of Fire Extinguisher

If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

No Ignition Sources

No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.

Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

Checks to the Refrigeration Equipment

Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt consult the manufacturer's technical department for assistance.

The following checks shall be applied to installations using flammable refrigerants:

• The actual refrigerant charge is in accordance with the room size within which the refrigerant containing parts are installed.
• The ventilation machinery and outlets are operating adequately and are not obstructed.
• If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant.
• Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
• Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.

Field Pipe Work

For appliances where field pipe work is required to complete a refrigeration system, after completion of field piping for split systems, the field pipework shall be pressure tested with an inert gas and then vacuum tested prior to refrigerant charging, according to the following requirements:

• Ensure that partial units (evaporating, evaporator, condensing or condenser) shall only be connected to an appliance suitable for the same refrigerant.
• Ensure that partial units (evaporating, evaporator, condensing or condenser) are compatible for the maximum operating pressure of each partial unit.
• The minimum test pressure for the low side of the system shall be the low side design pressure and the minimum test pressure for the high side of the system shall be the high side design pressure, unless the high side of the system, cannot be isolated from the low side of the system in which case the entire system shall be pressure tested to the low side design pressure.
• Field-made refrigerant joints located indoors shall be tightness tested. The test method shall have a sensitivity of 5 grams per year of refrigerant or better under a pressure of at least 0,25 times the maximum allowable pressure. No leak shall be detected.

Additional Charge

If additional charge is required to complete the connection of partial units, split units or during the completion of start-up, the following shall be completed:

• Adhere to all safety precautions defined in this manual.
• Ensure the refrigerant to be added to the system is of the same refrigerant number labeled on the appliance.
• Place the refrigerant storage tank on a calibrated scale and zero the scale.
• Charge unit as needed to achieve desired performance.
• Upon completion of charging, record the mass of refrigerant measured on the scale on the refrigerant charge label located next to the appliance serial tag. This shall be recorded in the field charge column.
• Add the factory charge, if applicable, and the field charge to determine the total charge and record that on the same label.

Repairs to Sealed Components

During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation. Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc. Ensure that apparatus is mounted securely. Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer's specifications.

Repair to Intrinsically Safe Components

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

Refrigerant Recovery

When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available. Ensure all cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs. The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders. If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.

Refrigerant Removal and Evacuation

When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, for flammable refrigerants it is important that best practice is followed since flammability is a consideration.

The following procedure shall be adhered to:

• Remove refrigerant;
• Purge the circuit with inert gas;
• Evacuate;
• Purge with inert gas;
• Open the circuit by cutting or brazing

The refrigerant charge shall be recovered into the correct recovery cylinders.

Ensure that the outlet for the vacuum pump is not close to any potential ignition sources and that ventilation is available.

Charging procedures

In addition to conventional charging procedures, the following requirements shall be followed.

• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
• Cylinders shall be kept in an appropriate position according to the instruction.
• Ensure that the refrigerating system is earthed prior to charging the system with refrigerant.
• Label the system when charging is complete (if not already).
• Extreme care shall be taken not to overfill the refrigerating system.

Prior to recharging the system, it shall be pressure tested with the appropriate purging gas. The system shall be leak-tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.

Leak Detection Methods

The following leak detection methods are deemed acceptable for systems containing flammable refrigerants.

• Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the Lower Flammability Limit (LFL) of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed.
• Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipework.
• If a leak is suspected, all naked flames shall be removed/extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak. Removal of refrigerant shall be according to removal and evacuation procedure.

Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.

• Become familiar with the equipment and its operation.
• Isolate system electrically.
• Before attempting the procedure ensure that: Mechanical handling equipment is available, if required, for handling refrigerant cylinders. All personal protective equipment is available and being used correctly. The recovery process is supervised at all times by a competent person. Recovery equipment and cylinders conform to the appropriate standards.
• Pump down refrigerant system, if possible.
• If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
• Make sure that cylinder is situated on the scales before recovery takes place.
• Start the recovery machine and operate in accordance with manufacturer's instructions.
• Do not overfill cylinders (no more than 80% volume liquid charge).
• Do not exceed the maximum working pressure of the cylinder, even temporarily.
• When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.
• Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

Labeling

Equipment shall be labeled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

Installation Requirements

Where minimum room areas, minimum airflows and conditioned space areas are defined, the tables in this manual can be utilized to verify the installation in accordance with the releasable charge within a unit. Ensure that the correct table is referenced for the refrigerant utilized in the appliance.

Note: The releasable charge is the maximum refrigerant charge of one circuit within an appliance when more than one circuit is present. An example of a two-circuit system would be a charge of 10 pounds (4.53 kg) in circuit A and a charge of 20 pounds (9.06 kg) in circuit B. The releasable charge of this appliance would be 20 pounds (9.06 kg).

Refrigerant Leak Detection System

Unit is equipped with refrigerant leak detection sensors. In the event of a leak in the air tunnel, the unit will move stagnant refrigerant from within the unit, duct, and space ensuring proper dilution. Alarm outputs available for monitoring and external action requirements which includes opening of zone dampers in the ductwork, disabling duct mounted electric resistance heaters, and/ or enabling mechanical ventilation if required. These outputs are available to the building management system or through hardwire mitigation system contacts in the unit control section.

Verification of the mitigation system response must be performed at start-up by removing the A2L mitigation test jumper found in the control section of the unit. Additional testing may be required by local code.

The refrigerant sensors installed in the appliance will initiate a safety sequence if a leak is detected. Maintain that the sensor is free of any dust or other contaminants. The alarm status is available in the form of an electronic signal from the appliance controller and a relay dry contact suitable for building safety sequences. The end of life of the sensor will result in the appliance operating and displaying that there is a leak detected, please reference the blink code on the bottom of the sensor and order a new sensor from the OEM.

Sensor blink code status:

• Solid green = sensor power-up and self-test
• Blinking green = normal operation (heartbeat)
• Solid red = alarm state – gas detected
• Blinking red = sensor fault – replace sensor

Optional Component Overview

Electric Heater

Factory installed electric heaters can be provided for preheat frost control. An electric preheater warms the outdoor air prior to the energy recovery device to prevent frosting.

Preheaters: Preheaters are standard as single-stage on/off control. Preheaters are single point wired at the factory. A thermodisc temperature sensor (with a 5°F set point) is mounted in the outdoor airstream after the preheater to turn the preheater on. See Frost Control Application/Operation for typical set points. If the temperature falls below the set point and the wheel pressure drop sensor is triggered, the preheater will turn on.

Access to the preheater control panel is through the outdoor air filter door.

Economizer

The energy wheel operation can be altered to take advantage of economizer operation (free cooling). Available modes are:

1. Stop wheel
2. Modulating wheel
3. Exhaust only operation

Stop wheel: A field-supplied call for cool is required. De-energizing the wheel is accomplished one of three ways:

1. The outdoor air temperature is less than the outdoor dry bulb set point (DRYBLB SET)
2. The outdoor air temperature is less than the return air temperature
3. The outdoor air enthalpy is within the preset enthalpy curve

Effectively, the two sensors create a deadband where the energy recovery wheel will not operate and free cooling from outside can be brought into the building unconditioned.

Modulating wheel (factory): A variable frequency drive is fully programmed at the factory. A "call for cool" must be field wired to the unit (terminals provided in unit-refer to wiring diagram in unit control center) to allow for initiation of economizer mode. The unit recognizes economizer conditions based one of the previously mention sensors and set points. The unit will then modulate the wheel speed to maintain the mixed air temperature set point (MAT SET).

Modulating wheel (by others): A variable frequency drive is fully programmed at the factory. A field-supplied 0-10 VDC signal will be required for operation of the energy wheel. The field will be required to have full control of the energy wheel speed at all times. If no 0-10 VDC signal is provided, the energy wheel will run at the factory default of 3 Hz and no energy transfer will be captured.

Exhaust only operation: The unit will have the capability to receive an external signal to power the supply fan on/off.

Frost Control

Extremely cold outdoor air temperatures can cause moisture condensation and frosting on the energy recovery wheel. Frost control is an optional feature that will prevent/control wheel frosting. Available options are:

1. Timed exhaust
2. Electric preheat
3. Modulating wheel

All of these options are provided with a thermodisc mounted in the outdoor air intake compartment and a pressure sensor to monitor pressure drop across the energy wheel.

An outdoor air temperature of below 5°F and an increase in pressure drop would indicate that frost is occurring. Both the pressure sensor and the outdoor air thermodisc must trigger in order to initiate frost control. The two sensors together ensure that frost control is only initiated during a real frost condition.

Timed exhaust frost control includes a timer in addition to the thermodisc and wheel pressure sensor. When timed exhaust frost control is initiated, the timer will turn the supply blower off. Time exhaust using default timer setting will shut down the supply fan for 5 minutes every 30 minutes to allow exhaust to defrost energy wheel. Use the test procedure in the Optional Start-Up Accessories section for troubleshooting.

Electric preheat frost control includes an electric heater (at outdoor air intake) in addition to the thermodisc and pressure sensor on wheel. When electric preheat frost control is initiated, the electric preheater will turn on and warm the air entering the energy wheel to avoid frosting. Use the test procedure in the Optional Start-Up Accessories section for troubleshooting.

Modulating wheel frost control includes a variable frequency drive (VFD) in addition to the thermodisc and pressure sensor. When modulating wheel frost control is initiated, the VFD will reduce the speed of the wheel. Reducing the speed of the energy wheel reduces its effectiveness, which keeps the exhaust air condition from reaching saturation, thus, eliminating condensation and frosting. If the outdoor air temperature is greater than the frost threshold temperature OR the pressure differential is less than the set point, the wheel will run at full speed. If the outdoor air temperature is less than 5°F AND the pressure differential is greater than the set point, the wheel will run at reduced speed until the pressure differential falls below the set point. The VFD will be fully programmed at the factory.

Rotation Sensor

The rotation sensor monitors energy wheel rotation. If the wheel should stop rotating, the sensor will close a set of contacts in the unit control center.

Dirty Filter Sensor

Dirty filter sensors monitor pressure drop across the outdoor air filters, exhaust air filters, or both. If the pressure drop across the filters exceeds the set point, the sensor will close a set of contacts in the unit control center. Field-wiring of a light (or other alarm) to these contacts will notify maintenance personnel when filters need to be replaced. The switch has not been set at the factory due to external system losses that will affect the switch. This switch will need minor field adjustments after the unit has been installed with all ductwork complete. The dirty filter switch is mounted in the exhaust inlet compartment next to the unit control center or in unit control center.

Dampers

Motorized outdoor air and exhaust air dampers are optional and are factory mounted and wired.

Pre Start-Up Check

DANGER: Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies.

WARNING: Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur.

Do not operate energy recovery ventilator without the filters and birdscreens installed. They prevent the entry of foreign objects such as leaves, birds, etc.

CAUTION: Do not run unit during construction phase. Damage to internal components may result and void warranty.

General Start-Up Information

Every installation requires a comprehensive start-up to ensure proper operation of the unit. As part of that process, the following checklist must be completed and information recorded. Starting up the unit in accordance with this checklist will not only ensure proper operation, but will also provide valuable information to personnel performing future maintenance. Should an issue arise which requires factory assistance, this completed document will allow unit experts to provide quicker resolve. Qualified personnel should perform start-up to ensure safe and proper practices are followed.

Unit Model Number: (e.g. VIVE-2)

Unit Serial Number: (e.g. 10111000)

Energy Wheel Date Code: (e.g. 0450)

Start-Up Date:

Start-Up Personnel Name:

Start-Up Company:

Phone Number:

Pre Start-Up Checklist

• Disconnect and lock-out all power switches
• Remove any foreign objects that are located in the energy recovery unit.
• Check all fasteners, set-screws, and locking collars on the fans, bearings, drives, motor bases and accessories for tightness.
• Rotate the fan wheels and energy recovery wheels by hand and ensure no parts are rubbing. If rubbing occurs, refer to Start-Up section for more information.
• Filters can load up with dirt during building construction. Replace any dirty pleated filters and clean the aluminum mesh filters in the intake hood. Refer to Routine Maintenance section.
• Check the tightness of all factory wiring connections.
• Verify control wire gauge. Refer to the Electrical Connections section.
• Verify diameter seal settings on the energy recovery wheel. Refer to Start-Up section for more information.

Start-Up Components

Fan

The fan should be checked for free rotation. If any binding occurs, check for concealed damage and foreign objects in the fan housing.

CAUTION: When operating conditions of the fan are to be changed (speed, pressure, temperature, etc.), consult manufacturer to determine if the unit can operate safely at the new conditions.

Supply/Exhaust Fan (Plenum Type)

The unit contains one or two plenum supply fans located on the end(s) of the unit. Efficient fan performance can be maintained by having the correct offset.

Offset: Proper offset, or overlap, is adjusted by loosening the wheel hub from the shaft and moving the wheel to the desired position along the shaft. The transition between the inlet cone and the wheel should be as shown; there is a smooth feel to the profile when moving one component to the other.

Refer to the respective Installation, Operation and Maintenance Manual shipped with this unit for additional start-up and maintenance information regarding the plenum fan.

Supply/Exhaust Fan Wheel Rotation Direction

Check for proper wheel rotation by momentarily energizing the fan. Rotation is determined by viewing the wheel from the drive side and should match the rotation decal affixed to the fan housing.

If the wheel is rotating the wrong way, direction can only be reversed by changing the motor program. Check for unusual noise, vibration or overheating of the bearings. Refer to the Troubleshooting portion of this manual if a problem develops.

Supply/Exhaust Fan Speed

Fan speed is controlled by the microprocessor controller. Motor speed will be set by changing the speed setting in the microprocessor controller during the unit Test and Balance. Always check the motor amperage rating shown on the motor nameplate when changing the fan RPM. All access doors must be installed except the control center door.

Vibration

Excessive vibration may be experienced during initial start-up. Left unchecked, excessive vibration can cause a multitude of problems, including structural and/or component failure. The most common sources of vibration are listed.

• Wheel Unbalance
• Mechanical Looseness
• Poor Inlet/Outlet Conditions
• Foundation Stiffness

Many of these conditions can be discovered by careful observation. Refer to the Troubleshooting section of this manual for corrective actions. If observation cannot locate the source of vibration, a qualified technician using vibration analysis equipment should be consulted. If the problem is wheel unbalance, in-place balancing can be done.

Generally, fan vibration and noise is transmitted to other parts of the building by the ductwork. To eliminate this undesirable effect, the use of flexible duct connectors is recommended.

Energy Recovery Wheel

VIVE models that contain a total energy recovery wheel are inspected for proper mechanical operation at the factory. However, during shipping and handling, shifting can occur that may affect wheel operation. The wheel is accessible through the access door marked "Energy Wheel Cassette Access".

Turn the energy recovery wheels by hand to verify free operation. The wheel should rotate smoothly and should not wobble.

Drive Belt: Inspect the drive belt. Make sure the belt rides smoothly through the pulley and over the wheel rim.

Air Seals: Check that the air seals located around the outside of the wheel and across the center (both sides of wheel) are secure and in good condition. Air seal clearance is determined by placing a sheet of paper, to act as a feeler gauge, against the wheel face. To access seals, follow the instructions in the Energy Recovery Wheel Maintenance section. To adjust the air seals, loosen all eight seal retaining screws. These screws are located on the bearing support that spans the length of the cassette through the wheel center. Tighten the screws so the air seals tug slightly on the sheet of paper.

Replace cassette into unit, plug in wheel drive, replace access door and apply power. Observe by opening door slightly (remove filters if necessary to view wheel) the wheel should rotate freely at about 20-40 RPM.

Optional Start-up Component

Dirty Filter Switch

To adjust the switch, the unit must be running with all of the access doors in place, except for the compartment where the switch is located (exhaust intake compartment). The adjusting screw is located on the top of the switch.

1. Open the filter compartment and place a sheet of plastic or cardboard over 50% of the filter media.
2. Replace the filter compartment door.
3. Check to see if there is power at the alert signal leads (refer to electrical diagram).
4. Whether there is power or not, turn the adjustment screw on the dirty filter gauge (clockwise if you did not have power, counterclockwise if you did have power) until the power comes on or just before the power goes off.
5. Open the filter compartment and remove the obstructing material.
6. Replace the door and check to make sure that you do not have power at the alert signal leads. The unit is now ready for operation.

Start-Up

SPECIAL TOOLS REQUIRED:

• Voltage Meter (with wire probes)
• Amperage Meter
• Thermometer
• Tachometer
• Incline manometer or equivalent

Start-Up Checklist

The unit will be in operational mode during start-up. Use necessary precautions to avoid injury. All data must be collected while the unit is running. In order to measure volts and amps, the control center door must be open, and the unit energized using a crescent wrench to turn the disconnect handle.

Check line voltage at unit disconnect

• L1-L2 volts
• L2-L3 volts
• L1-L3 volts

Motor Amp Draw

• Supply Fan: L1 amps, L2 amps, L3 amps
• Exhaust Fan: L1 amps, L2 amps, L3 amps
• Energy Wheel: L1 amps, L2 amps, L3 amps

Fan RPM: Supply Fan, Exhaust Fan

Correct fan rotation direction: Supply Fan Yes / No, Exhaust Fan Yes / No

Routine Maintenance

DANGER: Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies.

CAUTION: Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur.

Once the unit has been put into operation, a routine maintenance program should be set up to preserve reliability and performance. Items to be included in this program are:

Lubrication

Apply lubrication where required

Dampers

Check for unobstructed operation

Motors

Check for cleanliness

Blower Wheel & Fasteners

Check for cleanliness

Check all fasteners for tightness

Check for fatigue, corrosion, wear

Bearings

Check for cleanliness

Check set screws for tightness

Lubricate as required

External Filter

Check for cleanliness - clean if required

Internal Filter

Check for cleanliness - replace if required

Door Seal

Check if intact and pliable

Energy Recovery Wheel

Check for cleanliness - clean if required

Maintenance Procedures:

Lubrication

Check all moving components for proper lubrication. Apply lubrication where required. Any components showing excessive wear should be replaced to maintain the integrity of the unit and ensure proper operation.

Routine Maintenance

Dampers

Check all dampers to ensure they open and close properly and without binding. Backdraft dampers can be checked by hand to determine if blades open and close freely. Apply power to motorized dampers to ensure the actuator opens and closes the damper as designed.

Fan Motors

Motor maintenance is generally limited to cleaning and lubrication. Cleaning should be limited to exterior surfaces only. Removing dust and grease buildup on the motor housing assists proper motor cooling. Never wash-down motor with high pressure spray. Greasing of motors is only intended when fittings are provided. Many fractional motors are permanently lubricated for life and require no further lubrication.

Fan Wheel & Fasteners

Wheels require very little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel causing imbalance. When this occurs, the wheel and housing should be cleaned to assure smooth and safe operation. Inspect fan impeller and housing for fatigue, corrosion or wear.

Routinely check all fasteners, set screws and locking collars on the fan, bearings, drive, motor base and accessories for tightness. A proper maintenance program will help preserve the performance and reliability designed into the fan.

Bearings

Most bearings are permanently lubricated and require no further lubrication under normal use. Normal use being considered -20°F to 120°F and in a relatively clean environment. Some bearings are relubricatable and will need to be regreased depending on fan use. Check your bearings for grease zerk fittings to find out what type of bearing you have. If your fan is not being operated under normal use, bearings should be checked monthly for lubrication.

Internal Filter Maintenance

Units are always provided with 2-inch, pleated filters in the outdoor air and exhaust airstreams. These filters should be checked per a routine maintenance schedule and replaced as necessary to ensure proper airflow through the unit. See table for pleated filter size and quantity for each unit. Replacement filters shall be of same performance and quality as factory installed filters. Filter type must be pleated design with integral metal grid.

All dimensions in inches.

Outdoor Air Filters: Access to the outdoor air filters is through the door labeled as “Filter Access" on the outdoor air side of the unit.

Exhaust Air Filters: Access to the exhaust air filters is through the door labeled as “Filter Access" on the exhaust air side of the unit.

Refer to Access Door Descriptions section for additional information on filter locations.

Door Seal Maintenance

Stick-on type seal is installed on the door. Inspect at least annually to ensure that seal is still pliable and intact.

Energy Recovery Wheel Maintenance

Annual inspection of the energy recovery wheel is recommended. Units ventilating smoking lounges and other non-clean air spaces should have energy recovery wheel inspections more often based upon need. Inspections for smoke ventilation applications are recommended bimonthly to quarterly until a regular schedule can be established.

Accessing the Energy Recovery Wheel

Disconnect power to the unit. Open door labeled "Energy Wheel Cassette Access".

Unplug the wheel drive motor.

Pull the wheel cassette halfway out.

Removing the Energy Recovery Wheel Segments (stainless steel rim)

Steel retainers are located on the inside of the wheel rim. Push the retainer towards the center of the wheel, then lift up and away to release segments.

Routine Maintenance

IMPORTANT: Place retainers back in the original position before rotating the energy recovery wheel, otherwise damage to retainer will occur.

Cleaning the Energy Recovery Wheel

If the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Only excessive buildup of foreign material needs to be removed. Discoloration and staining of energy recovery wheel does not affect its performance.

Thoroughly spray wheel matrix with household cleaner such as Fantastik® or equivalent. Gently rinse with warm water and using a soft brush remove any heavier accumulation. A detergent/water solution can also be used. Avoid aggressive organic solvents, such as acetone. The energy recovery wheel segments can be soaked in the above solution overnight for stubborn dirt or accumulation.

After cleaning is complete, shake the excess water from the wheel or segments. Dry wheel or segments before placing them back into the cassette. Place wheel or segments back into cassette by reversing removal procedures.

CAUTION: Do not clean energy recovery wheel segments with water in excess of 140°F (60°C).

CAUTION: Do not dry energy recovery wheel segments in air in excess of 140°F (60°C).

The use of a pressure washer to clean segments is not recommended. Damage could result.

Energy Recovery Wheel Belt

Inspect belts each time filters are replaced. Belts that look chewed up or are leaving belt dust near the motor pulley may indicate a problem with the wheel. Be sure to inspect wheel for smooth and unrestricted rotation. If a belt requires replacement, contact the local Valent representative. Instructions for replacement will ship with the new belt.

Energy Recovery Wheel Bearing

In the unlikely event that a wheel bearing fails, the bearing is behind a removable plate on the wheel support beam. Contact the local Valent representative for detailed instructions on how to replace the bearing.

Troubleshooting – Unit

Always have a completed Pre Start-Up Checklist, unit Start-Up Checklist, and Optional Accessories Checklist prior to requesting parts or service information.

Maintenance Log

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Date: Time: AM/PM Notes:

Contact Us

Technical Support and Service

800-789-8550

Valent

60-28th Avenue North

Minneapolis, MN 55411

Main: 612-877-4800

More Information

Unit Schematics

For configuration and connection questions, see the schematics that shipped with your unit. They can typically be found attached to the main control panel door.

Mechanical and Controls Manuals

Find current mechanical and controls manuals here: www.valentair.com/resources

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OUTDOOR AIR EXPERTS

ROBUST DESIGNS

DEDICATED SUPPORT

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© 2024 Valent

Continuous product improvement is a policy of Valent; therefore, product functionality and specifications are subject to change without notice. For the most recent product information visit the product website.

Modular Dedicated Outdoor Air Unit

VIVE / VIV Manual

Part number: 487171

Rev. 1

December 2024