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TEST, CHECK AND STARTUP:

10. Repeat the same step for zone 2 and zone 
3. LED status should be the same with the 
exception that ZD2 light for the zone 2 

thermostat cooling test and ZD3 LED will light 
for the zone 3 thermostat test. 
11. The same test can be done for a heating call 
from each zone.

12.  Once  testing  is  confirmed,  place  zone 
thermostats in their proper mode of operation.  

ZP3-HPS-ESP SPECIFICATIONS:

Enclosure:

Aluminum

Panel Dimensions:

Height:  8.0”
Width:  6.0”
Depth  2.25”

PC Board Mounting:

Individual Snap Track mounted to enclosure base

Operating Temperature Rating:

-40° F to 150° F

Operating Humidity:

5% to 90% RH non-condensing

Wiring:

18-gauge wire for all equipment and component  
connections.

Time Delays:

3 minutes off between heating and cooling calls.
3 minutes off on high or low limit
20 minute time share
Purge ON = 1 minute

Thermostats:

Single or multi-stage heat pump
Programmable or non-programmable
Auto or manual changeover

Sensors:

iO-ZP3-DAS Discharge Air Sensor
  NTC Type 3, 10K  @ 77° F, +/- 3% @ 77° F

iO-ZP3-OT Outdoor Sensor
  NTC Type 3, 10K  @ 77° F, +/- 3% @ 77° F

 

FIELD WIRING TERMINALS:

Zone Thermostats:

  

C  

24Vac (Common)

  R 

24Vac (Hot)

  W 

Auxiliary or Emergency Heat

  Y1 

First Stage Compressor

  Y2 

Second Stage Compressor

  G 

Fan

  O/B  Reversing Valve

HVAC Equipment:

 

 

24Vac Equipment Hot

  W 

Auxiliary or Emergency Heat

  Y1 

First Stage Compressor

  Y2 

Second Stage Compressor

  G 

Fan

  O/B  Reversing Valve

High / Low Limit

  

DA 

Land to ZPA-DTS

   DA   Land to ZPA-DTS

Outdoor Temperature Sensor

 

 

OT 

Land to ZPA-OTS

  OT 

Land to ZPA-OTS

Panel Power:

  

24Vac (Common)

   R  

24Vac (Hot)

Damper Outputs

  

PC  

Power Close

  C 

Common

  PO 

Power Open

Pressure Sensor:

 

 

Land to ZPA-SPS

  3 

Land to ZPA-SPS

7

iO-06-1279-060221

Indianapolis, IN 46237

www.iohvaccontrols.com

For Technical Support Call Toll Free: 866-225-5032

Summary of Contents for ZP3-HPS-ESP

Page 1: ...will changeover and take care of the opposite call If zones being served heating or cooling have 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...

Page 2: ...ED ZONE 3 DAMPER LED REVERSING VALVE LED O B REVERSING VALVE SWITCH CONVENTIONAL HEAT PUMP OR FOSSIL FUEL SWITCH 3 AMP 3 AMP 302HP ZONE 2 THERMOSTAT ZONE 2 DAMPER ZONE 3 THERMOSTAT ZONE 3 DAMPER HVAC UNIT TERMINALS DISCHARGE TEMPERATURE SENSOR OUTDOOR SENSOR USED FOR HIGH LOW BALANCE POINT CONTROL STATIC PRESSURE SENSOR LED STATIC PRESSURE SENSOR TERMINALS LOW BP LED LOW BP SETPOINT DIAL SPEED UP ...

Page 3: ...2ND STAGE COMPRESSOR G FAN O B REVERSING VALVE POWER CLOSE COMMON POWER OPEN C 24V COMMON R 24V HOT W AUXILIARY HEAT Y1 1ST STAGE COMPRESSOR Y2 2ND STAGE COMPRESSOR G FAN O B REVERSING VALVE POWER CLOSE COMMON POWER OPEN R 24V HOT W AUXILIARY HEAT Y1 1ST STAGE COMPRESSOR Y2 2ND STAGE COMPRESSOR G FAN O B REVERSING VALVE WIRE TO ESP 400 PS PRESSURE SENSOR WIRE TO ZPA DST DISCHARGE TEMPERATURE SENSO...

Page 4: ...BP is adjustable from 0 F to 40 F High and Low balance point control can be used for both conventional heat pumps and fossil fuel systems If the outdoor temperature goes above the High BP setting the system will not stage auxiliary heat If the outdoor temperature falls below the Low BP setting only the auxiliary heat source will be used High BP can be overridden by placing any zone thermostat in t...

Page 5: ...WIRING THE ZPA DTS DISCHARGE TEMPERATURE SENSOR Drill a 15 32 hole in the middle of the main discharge air plenum approximately 18 to 30 from the heat pump electric strip heater or the furnace heat exchanger in a fossil fuel application Slide the discharge air probe into the hole and use two self tapping sheet metal screws to secure the base to the plenum Use conventional 18 2 thermostat wire and ...

Page 6: ...wire nuts Land the other end to the SENSOR screw terminals marked OTon the panel TEST CHECK AND STARTUP 1 Verify that all component wires have been connected to the proper terminals and are secure 2 Make sure that the selector switches on the panel are in their proper position for the specific application 3 Apply 24 Volt power to the panel 4 Place all zone thermostats in the OFF mode with Auto fan...

Page 7: ... low limit 20 minute time share Purge ON 1 minute Thermostats Single or multi stage heat pump Programmable or non programmable Auto or manual changeover Sensors iO ZP3 DAS Discharge Air Sensor NTC Type 3 10K 77 F 3 77 F Ω iO ZP3 OT Outdoor Sensor NTC Type 3 10K 77 F 3 77 F Ω FIELD WIRING TERMINALS Zone Thermostats C 24Vac Common R 24Vac Hot W Auxiliary or Emergency Heat Y1 First Stage Compressor Y...

Page 8: ...ans DSI controls generate electromagnetic interference EMI during their trial for ignition This electronic noise can sometimes interfere with ESP zoning panels as well as other nearby electronic components and even with the ignition control itself When using an ESP zoning panel with a gas furnace having DSI we recommend that the panel be mounted at least ten feet away from the furnace to reduce an...

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