iO HVAC Controls
Instruction Manual for HVAC Controls models including: ZP3-HCMS Auto Changeover First Call Priority, ZP3-HCMS, Auto Changeover First Call Priority, First Call Priority, Call Priority, Priority
File Info : application/pdf, 4 Pages, 38.35KB
DocumentDocumentZP3-HCMS Installation and Operation Instructions (Versions 301) 2 Heat / 2 Cool - Auto Changeover First Call Priority - Time Share HVAC Controls High and Low Limit Protection: The ZPA-DTS Discharge Temperature Sensor should be mounted on the discharge air plenum of the HVAC unit and wired to the DA terminals on the panel. The sensor is used for both high and low limit protection. The high limit setting can be adjusted using the two slide switches located on the panel. (See switch location and settings on page 2) The low limit is fixed at 45° F. When the discharge air temperature rises above the high limit setting or falls below the low limit setting, the panel will cycle the equipment off while the fan continues to run. The LIMIT LED blinks when high or low limit is reached. Sequence of Operation: The ZP3-HCMS is a residential / light commercial zone control system that allows a single HVAC unit to have up to three separate zones. Each zone is controlled by its own space thermostat and motorized zone damper. If a zone thermostat calls for heating or cooling, the zones not calling will have their dampers powered closed, and the zone calling will have its damper opened. The heating or cooling equipment will also be brought on at the same time. When the zone calling is satisfied, the heating or cooling equipment turns off. If one zone calls for heating and another zone calls for cooling, the first zone to call receives priority. When the first call is satisfied, the system will changeover and take care of the opposite call. If a zone being served (heating or cooling) has not been satisfied within 20 minutes while an opposite call is taking place, the system will changeover. When the zone is satisfied or 20 minutes has elapsed, the system will again changeover if an opposite call exists. This is referred to as Auto Changeover - First Call Priority - Time Share. In the event of a tie, cooling will receive priority. Ventilation Mode: Zone ventilation is established by the individual zone thermostat fan setting. Any thermostat set in the fan AUTO mode will not receive ventilation air when there are no heating or cooling calls. Any thermostat set in the fan ON mode will receive ventilation air whenever there are no heating or cooling calls. Power Requirements: The ZP3-HCMS requires a separate 24 Vac transformer. A 40 VA transformer will power the panel and up to four (4) dampers. A 75 VA transformer will power the panel and up to seven (7) dampers. If more than three (3) dampers for an individual zone are required, a RY-1-HB relay should be used with an additional properly sized transformer. iO Systems HD-XXXX rectangular and D-XX round dampers are powered closed / spring return open. Damper actuators are rated at 10 VA. If 3-wire dampers (powered open / powered closed) are installed, VA ratings will vary depending on the damper actuator used. Wiring: All wiring should be conventional 18 gauge thermostat wire. Thermostats and zone dampers may be located up to 300 feet from the ZP3-HCMS panel. ZP3-HCMS Installation and Operation Instructions (Versions 301) 2 Heat / 2 Cool - Auto Changeover First Call Priority - Time Share ZONE 1 THERMOSTAT ZONE 1 DAMPER ZONE 2 THERMOSTAT ZONE 2 DAMPER ZONE 3 THERMOSTAT ZONE 3 DAMPER 24 VOLTS ZONE 3 THERMOSTAT DAMPER ZONE 2 THERMOSTAT DAMPER ZONE 1 THERMOSTAT PURGE SWITCH (When set to ON, fan will continue to run and air will be purged to last zone calling for 1 minute after call is satisfied) 301HC PURGE C 24V 24 VOLT POWER LED ON OFF R ON W1 W2 1 2 Y1 ADJUSTABLE HIGH LIMIT Y2 G SWITCH 12 LIMIT OFF OFF 130 PC ON OFF 140 C OFF ON 150 ON ON 160 PO C W1 FIRST STAGE HEAT LED W2 SECOND STAGE HEAT LED Y1 FIRST STAGE COOL LED Y2 SECOND STAGE COOL LED G FAN LED R W1 LIMIT HIGH / LOW LIMIT LED W2 ZD1 ZONE 1 DAMPER LED Y1 Y2 ZD2 ZONE 2 DAMPER LED G PC ZD3 ZONE 3 DAMPER LED C PO RC/RH JUMPER RH/RC JUMPER C R RH W1 RC HVAC UNIT W2 W1 Y1 Y2 W2 HVAC UNIT TERMINALS Y1 G Y2 PC G C SENSOR PO DA DISCHARGE DA TEMPERATURE SENSOR R X 24VAC DAMPER POWER 4 AMP ZONE SYSTEM 4 AMP 4 Amp fuse protects printed circuit board 4 AMP HVAC EQUIPMENT 4 AMP 4 Amp fuse protects the relay contacts ZP3-HCMS Installation and Operation Instructions (Versions 301) 2 Heat / 2 Cool - Auto Changeover First Call Priority - Time Share Installation Wiring the Transformer: Wire a separate 24 Volt transformer of the proper Mounting the Panel: VA to the logic panel terminals marked (R) and Carefully remove the ZP3-HCMS panel and (X). Do not power the panel up until wiring is cover from the shipping carton. Slide the PC completed. board out of the snap track base and mount the base to a flat surface either on or near the HVAC Test, Check and Startup: indoor unit in an area that will facilitate easy 1. Verify that all component wires have been access for wiring. Reinstall the PC board by connected to the proper terminals and are secure. carefully centering it over the base and snapping 2. Disconnect the HVAC equipment (R) terminal it back into the track groves. wire at the panel and apply 24 Volts to panel. 3. Take a jumper wire and momentarily short the Wiring the Zone Thermostats and Dampers: DA terminals. This will put the panel's time delays Refer to the logic panel wiring diagram. Wire in "speed up" mode. zone 1 thermostat and its associated damper to 4. Place the zone thermostats in the OFF position. the ZONE 1 terminals on the logic panel. Wire 5. The panel accepts 2-wire (power close / spring zone 2 and 3 thermostats and dampers in the open) or 3-wire (power open / power close) zone same manner. dampers. 2-wire dampers should be wired to the (C) and (PC) terminals. Wiring the HVAC Equipment: 6. Place zone one thermostat in the fan ON mode. Wire the HVAC unit to the panel terminals. Do not ZD1 LED will remain on and ZD2 and ZD3 LED wire the equipment common to the ZP3-HCMS will go out. The (G) FAN LED will come on. panel. 7. Confirm that zone one damper is in the open position and zone two and three dampers are Installing and Wiring the ZPA-DTS closed. Discharge Temperature Sensor: 8. Leave zone one thermostat in fan ON and place Drill a 15/32" hole in the middle of the main zone two thermostat in the fan ON mode. ZD2 discharge air plenum approximately 18" to 30" LED will come on. from the heat pump electric strip heater or the 9. Confirm that both zone one and zone two furnace heat exchanger in a fossil fuel dampers are in the open position and zone three application. Slide the discharge air probe into the damper is closed. hole and use two self-tapping sheet metal 10. Leave zone one and zone two thermostats in screws to secure the base to the plenum. Use Fan ON and place zone three thermostat in the conventional 18-2 thermostat wire and wire nuts fan ON mode. ZD3 LED will come on. Confirm to attach the sensor leads. Replace the cover that all zone dampers are in the open position. with the wire nut connections inside. Strip 1/8" 11. Place all zone thermostats in the Auto fan insulation off of each wire at the other end and mode. and the wires to the screw terminals marked DA 12. Remove 24 Volts to the panel and reconnect on the panel. the HVAC ® wire. 10. When 24 Volts is applied again to the panel, the internal time delays will be activated. 11. Place zone thermostats in proper mode of operation. 12. Confirm that the LIMIT LED is ON. If not, check LIMIT wiring. If the system goes out on high or low limit, the LIMIT LED will blink. ZP3-HCMS Installation and Operation Instructions (Versions 301) 2 Heat / 2 Cool - Auto Changeover First Call Priority - Time Share Specifications Panel Dimensions: Height: 8.0 Inches Width: 6.0 Inches Depth: 1.375 Inches Mounting: Snap Track with 2 back plate screws Operating Temperature Rating: -40° F to 150° F Operating Humidity: 5% to 90% RH non-condensing Wiring: 18-gauge wire for all equipment and system connections Time Delays: 3 minutes minimum off between cooling calls 3 minutes minimum off on low limit 20 minute time share Purge ON = 1 minute Thermostats: Single or multi-stage heat / cool Programmable or non-programmable Auto or manual changeover Dampers: PC C PO Powered Closed Common Powered Open High / Low Limit DA Land to ZPA-DTS DA Land to ZPA-DTS HVAC Equipment: RH 24Vac Heating Transformer RC 24Vac Cooling Transformer W1 First Stage Heat W2 Second Stage Heat Y1 First Stage Cool Y2 Second Stage Cool G Fan Panel Power: R 24Vac (Hot) X 24Vac (Common) ZONE 3 STAT ZONE 2 STAT ZONE DAMPER 2 ZONE DAMPER 3 ZONE 1 STAT ZONE DAMPER 1 Terminal Designations Thermostats: C 24Vac (Common) R 24Vac (Hot) W1 First Stage Heat W2 Second Stage Heat Y1 First Stage Cool Y2 Second Stage Cool G Fan DISCHARGE TEMPERATURE SENSOR ZP3-HCMS PANEL 24 VOLT TRANSFORMER FURNACE HVAC Controls Indianapolis, IN 46237 www.iohvaccontrols.com For Technical Support Call Toll Free: 866-225-5032 iO-06-1168-010818