Hi-Velocity Systems HVS-24 Variable Speed Heat Pump
Specifications:
- Model: HVS Variable Speed Heat Pump
- Available Sizes: 2 Ton (HVS-24), 3 Ton (HVS-36), 5 Ton (HVS-60)
- Manufacturer: Hi-Velocity SystemsTM
- Website: www.hi-velocity.com
Product Usage Instructions
HVS Series Overview
The HVS Series Inverter Drive Variable Speed Heat Pumps are designed for various applications. They modulate refrigerant flow and indoor air flow to match output capacity to the load, resulting in superior energy performance.
HVS Location Selection
Ensure proper clearances as specified in the manual for optimal performance and maintenance access.
Refrigeration Circuit
Use pipe insulation on both liquid and suction lines with minimum sizes as specified. Additional refrigerant is required for line sets longer than 25 ft. Follow tightening torque and flare shape guidelines for flare connections.
FAQ:
- Q: What should I do if the unit does not seem to be cooling/heating efficiently?
A: Check the pipe insulation, clearances, and refrigerant levels as per the manual. Consult a professional if issues persist. - Q: How often should the system be serviced?
A: Regular maintenance is recommended at least once a year to ensure optimal performance.
HVS
Variable Speed Heat Pump
Installation and Operation
From the Manufacturers of Hi-Velocity SystemsTM www.hi-velocity.com
Module-HVS-Variable-Speed-Heat-Pump-120121b
Module HVS Variable Speed Heat Pump Installation
HVS Variable Speed Heat Pump
HVS Series Inverter Drive Variable Speed Heat Pumps are ideally suited for any application. When used with the HE-Z Series, the system modulates refrigerant flow and indoor air flow to precisely match output capacity to load. The ability to match output capacity to load results in superior energy performance not just at the ANSI/AHRI Standard test conditions but right through the entire operational range.
Fixed speed and 2-staged condensing units are not well suited for constantly changing load requirements and multizone applications due to their inability to reduce capacity below 70%. These systems overcome the problem by running the indoor fan at high flow rates and dumping or bypassing excess air.
This strategy wastes energy, reduces efficiencies and sacrifices comfort in exchange for a properly functioning system. The HVS Variable Speed Heat Pump in conjunction with the HE-Z Series Air Handler solves this ongoing issue. The outdoor unit (inverter) monitors indoor coil (evaporator) conditions to maintain a steady air off temperature. No matter the load or number of zones open, the Variable Speed Heat Pump will adjust refrigerant flow or capacity to match these everchanging conditions.
HVS Location Selection
- The outdoor unit must be installed level, in a properly supported outdoor location that is adequately ventilated. Avoid installing outdoor unit on walkways and patios.
- Outdoor unit should be installed using the rubber vibration isolation feet that were supplied with the outdoor unit.
- It is good practice to secure the outdoor unit to its footings or base. If unit is to sit on an equipment riser, stand or hanger, it must be properly secured.
- Locate the outdoor unit as close as possible to the indoor unit. Ensure minimum and maximum lineset lengths meet the min/max length specifications on page 4.
- Outdoor unit should be installed in a location that can maintain the clearances specified on page 3 to ensure proper airflow/heat exchange and maintenance space.
- Must be elevated above the Annual Snow Accumulation Level or average snow fall depths.
- Make sure the piping/lineset vertical height drops do not exceed the allowable value specified on page 4.
- Locate the outdoor unit where the noise, vibration and outlet air does not disturb residence, occupants or neighbors.
- Ensure the air inlet or outlet is not impeded and does not face strong/prevailing winds.
- Avoid locating the outdoor unit in a location that is severely dirty, polluted, or contaminated (e.g. close to a dryer vent or under a tree) to avoid blockage of the heat exchanger. If it is, maintenance or cleaning may be needed more than bi-annually.
- If the outdoor unit is installed under an overhang or in an encloser to protect it from direct sunlight, rain exposure, snow, or strong winds, ensure it still maintains the needed clearances and avoid roof driplines.
Clearances
Refrigeration Circuit
Important: Pipe Insulation (min. 3/8”) MUST be used on both liquid and suction lines. Ensure insulation covers the entire line set, including flare fittings & penetrations.
- The Electronic Expansion Valve is internal to the HVS Variable Speed Heat Pump, therefore a TXV at the evaporator (indoor unit) is not needed.
- Maximum pipe length for the HVS-24 is 164.5’ (50 m), for the HVS-36 and HVS-60 is 213 ft (65 m). Lines must be sized correctly to ensure that pressure drops within the system are minimized. HVAC mechanics should refer to the pipe sizing table below prior to installation.
- Minimum refrigerant pipe length is 16 ft (5 m). If going less than 16 ft, coil the additional copper pipe up in horizontal loops to ensure proper oil return.
- Refrigeration grade copper tubing is the only tubing to be used. Fittings used for bends, elbow, ‘P’ trap, ‘Y’ piece, etc., must be of the wrought copper type and clean from dust, burrs, oil, etc. It is recommended that the tube is cut with a tube cutter and the entire ID is made the correct size with an expanding device after cutting.
- All joints in the piping must be clean and free from dust, burrs, oil, etc.
- All joints must be silver soldered with at least 10% silver content.
Minimum pipe sizes, maximum length and maximum lift
| Model | Liquid Line | Suction Line | Maximum Length | Maximum Lift |
| HVS-24 | 3/8” (9.5 mm) | 5/8” (15.9 mm) | 164.5’ (50 m) | 82’ (25 m) |
| HVS-36 | 3/8” (9.5 mm) | 5/8” (15.9 mm) | 213.25’ (65 m) | 98.4’ (30 m) |
| HVS-60 | 3/8” (9.5 mm) | 3/4 (HVS_60 = 7/8”) | 213.25’ (65 m) | 98.4’ (30 m) |
The HVS Variable Speed Heat Pump comes with a factory charge. Additional charge will only be needed on line sets longer than 25 ft. (See table below)
Minimum pipe sizes, factory charge and additional refrigerant required
|
Model |
Liquid Line |
Suction Line |
Factory Charge (kg) |
Add extra refrigerant for line sets
over 25 ft (7.5 m) |
| HVS-24 | 3/8” (9.5 mm) | 5/8” (15.9 mm) | 5.18 lbs (2.35 kg) | 1 oz/ 3 ft |
| HVS-36 | 3/8” (9.5 mm) | 5/8” (15.9 mm) | 6.75 lbs (3.06 kg) | 1 oz/ 3 ft |
| HVS-60 | 3/8” (9.5 mm) | 3/4 (HVS_60 = 7/8”) | 10.15 lbs (4.6 kg) | 1 oz/ 3 ft |
Flare Connections
When tightening flare connections on the HVS Heat Pump, refer to tightening torque and flare shape below. It is suggested to use “Nylog Blue” to seal flare connections. (If doing so, tighten to the lower end of the range of the chart below.)
| Pipe Size | Tightening Torque | Flare Dimensions (A) | Flare Shape | |
| Min. | Max. | |||
| 1/4”Ø (6.4 mm) | 13 – 15 ft-lb (18-20 N.m.) | 0.33”
(8.4 mm) |
0.34”
(8.7 mm) |
 |
| 3/8”Ø (9.5 mm) | 24 – 29 ft-lb (32-39 N.m.) | 0.52”
(13.2 mm) |
0.53”
(13.5 mm) |
|
| 1/2”Ø (12.7 mm) | 36 – 44 ft-lb (49-60 N.m.) | 0.64”
(16.2 mm) |
0.65”
(16.5 mm) |
|
| 5/8”Ø (15.9 mm) | 42 – 52 ft-lb (57-71 N.m.) | 0.76”
(19.3 mm) |
0.78”
(19.8 mm) |
|
| 3/4”Ø (19.1 mm) | 49 – 74 ft-lb (67-101N.m.) | 0.91”
(23.2mm) |
0.93”
(23.7 mm) |
|
| 7/8”Ø (22.2 mm) | 63 – 81 ft-lb (85-110 N.m.) | 1.04”
(26.4 mm) |
1.06”
(26.9 mm) |
|
Installing Oil Traps
For proper oil return to compressor, oil traps must be installed on the suction line risers:
- Every 33 ft (10 m) when indoor unit is higher than the outdoor unit.
- Every 20 ft (6 m) when outdoor unit is higher than the indoor unit
Indoor is Higher than Outdoor
Outdoor is Higher than Indoor 
Oil Trap Detail 
Interface Panel
- The interface panel is critical for indoor and outdoor unit communication.
- Field wiring shown on the wiring page is needed between the indoor unit and the interface panel, and between the interface panel and the outdoor unit using unshielded cable on the HVS-24, and shielded cable on the HVS-36 & HVS-60.
IMPORTANT
For the HVS-24 – It is critical to use unshielded communication cable (14 AWG / 4 Conductor, stranded) when running the 1, 2 and 3 communication wires between the ’24v Interface Kit’ and the HVS-24 outdoor unit.
For the HVS-36 & HVS-60 – It is critical to use shielded cable (18 AWG / 4 Conductor) when running the S1 and S2 communication wires between the ’24v Interface Kit’ and the outdoor unit.
See wiring diagrams for further details.
- Ground shielding of cable at the condenser side and cap off opposite end with a wire nut or equivalent.
- Use provided EMC magnetic ring. Wrap the communication wires around the ring twice at the ‘24v Interface Kit’ side of the communication wires:
- The outdoor unit and the interface panel both require 240v supply power and require surge protection in locations with power fluctuations or inconsistencies.
NOTE: For HVS-24 the interface panel is provided with 240v via the outdoor unit. In this case, only the outdoor unit requires surge protection.
For HVS-36 and HVS-60 the interface panel and outdoor unit require separate power supplies. In this case, both need to be surge protected.
- The interface requires 24v from indoor unit (R & C).
- One temperature sensor is supplied with the interface panel which connects to T1 on the interface panel. This temperature sensor will need to be installed for the unit to operate properly and should be securely installed in the return air ductwork.
Return Air Temperature Sensor
- For the HVS variable speed heat pump to modulate correctly, the provided return air temperature sensor must be installed in the return air ductwork, just upstream from the evaporator.
- A small hole must be drilled into the return air ductwork to fit the temperature sensor in.
- This sensor should be secured using tie straps/nylon cable ties or screw mount cable ties.
- The hole drilled must be sealed back up after the sensor is screwed in the R/A ductwork.
- This T1 temperature sensor must not exceed 23’ (7m) in length. This means that the interface panel must be placed within reach of the R/A ductwork just upstream from the evaporator.
Drain Fitting Installation (not provided w/ all models)
- Fit the rubber seal on the end of the drain fitting that will connect to the outdoor unit.
- Insert the drain fitting into the hole in the base pan of the unit (located on bottom panel of unit).
- Rotate the drain fitting 90o until it clicks in place, facing the front of the unit.
- Connect a drain hose extension (not provided) to the drain fitting to redirect water from the unit (if desired) during heating mode.
Important: Make sure water drains to a safe location that meets local codes and regulations and where it will not cause water damage or a slipping hazard.
Note: Make sure water drains to a safe location that meets local codes and regulations and where it will not cause water damage or a slipping hazard.
HVS-24 Variable Speed Heat Pump Wiring
HVS Variable Speed Heat Pump Specifications – Dimensions HVS-24/HVS-36
HVS Variable Speed Heat Pump Specifications
| Specifications | HVS-24 | HVS-36 | HVS-60 |
|
Part Number |
40180400002 |
40180400003 |
40180400005 |
| Outdoor Unit Tonnage | 2 Ton (7 kW) | 3 Ton (10.5 kW) | 5 Ton (17 kW) |
| Capacity Data | |||
| Nominal Cooling Capacity(1) (2) | 23,500 BTU (6.9 kW) | 35,500 BTU (10.4 kW) | 57,300 BTU (16.8 kW) |
| Operational Range (Cooling) | 6,000-24,000 BTU (1.8 – 7 kW) | 9,000-36,000 BTU (2.6 – 10.5 kW) | 15,000-60,000 BTU (4.4 – 17.6 kW) |
| Nominal Heating Capacity(1) (2) | 26,200 BTU (7.7 kW) | 38,200 BTU (11.2 kW) | 60,400 BTU (17.7 kW) |
| Operational Range (Heating) | 6,950-27,800 BTU (2.0 – 8.1 kW) | 10,325-41,300 BTU (3.0 – 12.1 kW) | 15,375-61,500 BTU (4.5 – 18.0 kW) |
| Highest Variable Airflow | 2,350 CFM (1,109 L/s) | 2,500 CFM (1,180 L/s) | 4,400 CFM (2,077 L/s) |
| Lowest Variable Airflow | 400 CFM (190 L/s) | 400 CFM (190 L/s) | 400 CFM (190 L/s) |
| Electrical Data | |||
| Power Supply | 208 – 240 Volts
1 Phase – 50/60 Hz |
208 – 240 Volts
1 Phase – 50/60 Hz |
208 – 240 Volts
1 Phase – 50/60 Hz |
| Nom. Full Load Amps | 17 | 23 | 26.5 |
| Min. Circuit Ampacity | 22 | 30 | 36.5 |
| Max Fuse | 30 | 45 | 50 |
| Electrical Input Cooling (kW)(1) | 2.0 | 3.25 | 5.3 |
| Electrical Input Heating (kW)(1) | 2.3 | 3.15 | 5.2 |
| Sound Pressure (dB) (A) @ 1m | 61 | 62 | 63 |
| Soft Starter | Variable Frequency | ||
| Dimensions – Outdoor Unit | |||
| Dimensions (L x W x H) | 38” x 16.14″ x 32″
(965mm x 410mm x 813mm) |
38” x 16.14″ x 32″
(965mm x 410mm x 813mm) |
37.5” x 16.25″ x 52.5″
(953mm x 413mm x 1,334mm) |
| Weight | 155 lbs (70.3 kg) | 155 lbs (70.3 kg) | 269 lbs (122 kg) |
- Capacities are based on A.S.3823.12
- Capacity modulation is extended by variable indoor airflow. Actual percentage loading will vary depending on application.
DESIGN CONDITIONS:
Cooling 35°C (95°F) DB Outdoor / 27°C (80°F) DB, 19°C (66°F) WB Air Entering Indoor Unit Heating 7°C (44°F)DB, 6°C (43°F) WB Outdoor/ 21°C (70°F) DB Air Entering Indoor Unit Nominal Operating Range -10°C (14°F) WB to 50°C (122°F) DB
Sound pressure level is influenced by the surroundings, therefore it may vary upon location.
Features:
- Variable Speed Compressor allows for Zoning with True Efficiency
- 2, 3 or 5 Ton Cooling Capacity
- Easy Installation
- Energy Efficient Zoning
- Patented Interface allows Integration with 3rd Party Air Handlers
Energy Saving Products Ltd, established in 1983, manufactures the Hi-Velocity SystemsTM product line for residential, commercial and multi-family markets. Our facilities house Administration, Sales, Design, Manufacturing, as well as Research & Development complete with an in-house test lab. Energy Saving Products prides
itself on Customer Service and provides design services and contractor support. For all of your Heating, Cooling and Indoor Air Quality needs, the Hi-Velocity System is the right choice for you!
Small Duct Heating, Cooling and IAQ Systems
Build Smart, Breathe Build Smart, Breathe EasEasyy
Hi-VHi-Velocity HE-Z Air Handlers, elocity HE-Z Air Handlers, Green Green TTechnologyechnology
- Phone: 780-453-2093
- Fax: 780-453-1932 Toll
- Free: 1-888-652-2219
Documents / Resources
 |
Hi-Velocity Systems HVS-24 Variable Speed Heat Pump [pdf] Installation Guide HVS-24, HVS-36, HVS-60, HVS-24 Variable Speed Heat Pump, HVS-24, Variable Speed Heat Pump, Speed Heat Pump, Heat Pump |
