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Johnson Controls Unitary Products YORK ZR Series Installation Manual

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R-410A
ZR SERIES
3 - 5 Ton
60 Hertz
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Safety Information. . . . . . . . . . . . . . . . . . . . . . . 5
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 13
Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Checking Supply Air CFM . . . . . . . . . . . . . . . . . . . . . . . . . 40
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1 ZR036-060 Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 ZR036-060 Unit Accessory Weights . . . . . . . . . . . . . . . . . 8
4 ZR036-060 Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 10
5 ZR036-060 Utilities Entry . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 ZR036-060 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Electric Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . 30
10 Gas Heat Application Data . . . . . . . . . . . . . . . . . . . . . . . 30
11 Gas Pipe Sizing - CapacIty of Pipe . . . . . . . . . . . . . . . . . 31
13 ZR Blower Performance Side Duct . . . . . . . . . . . . . . . . . 37
1 ZR036-060 Component Location . . . . . . . . . . . . . . . . . . . 6
2 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Unit 6 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hood Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 10
8 ZR036-060 Disconnect Location . . . . . . . . . . . . . . . . . . 10
9 ZR036-060 Unit Side Duct Openings . . . . . . . . . . . . . . . 11
10 ZR036-060 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . 11
11 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
12 Compressor Restraining Bracket . . . . . . . . . . . . . . . . . . 13
13 Typical Field Power and Control Wiring . . . . . . . . . . . . . 15
14 Side Entry Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 31

TABLE OF CONTENTS

Sequence Of Operations Overview. . . . . . . . . . . . . . . . . . 41
Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 41
Reheat Mode Sequence Of Operation . . . . . . . . . . . . . . . 41
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 42
Electric Heating Sequence Of Operations . . . . . . . . . . . . 43
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . 43
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . 44
Gas Heat Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 45
Flash Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Heat Anticipator Setpoints. . . . . . . . . . . . . . . . . . . . . . . . . 46
Start-up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Start-up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Checking Gas Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Charging The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fan On And Off Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
LIST OF TABLES
14 ZR Blower Performance Bottom Duct . . . . . . . . . . . . . . . 38
15 Belt Drive RPM Selection . . . . . . . . . . . . . . . . . . . . . . . . 39
17 Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . 40
18 Additional Static Resistance . . . . . . . . . . . . . . . . . . . . . . 41
19 Electric Heat Limit Setting . . . . . . . . . . . . . . . . . . . . . . . . 44
20 Electric Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . 44
22 2 Stage Gas Heat Limit Control Setting . . . . . . . . . . . . . 46
23 Gas Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . . . . 46
24 Gas Rate-Cubit Feet per Hour . . . . . . . . . . . . . . . . . . . . 49
25 Unit Control Board Flash Codes . . . . . . . . . . . . . . . . . . . 57
26 Ignition Control Board Flash Codes . . . . . . . . . . . . . . . . 57
LIST OF FIGURES
15 Bottom Entry Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . 31
16 Vent And Combustion Air Hood . . . . . . . . . . . . . . . . . . . 33
17 Enthalpy Set Point Chart . . . . . . . . . . . . . . . . . . . . . . . . 34
18 Honeywell Economizer Control W7212 . . . . . . . . . . . . . 34
19 Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
20 Altitude/Temperature Correction Factors . . . . . . . . . . . . 35
21 Pressure Drop Across Coil . . . . . . . . . . . . . . . . . . . . . . . 40
22 Gas Valve Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
23 Typical Single Stage Gas Valves . . . . . . . . . . . . . . . . . . 47
24 Typical 2 Stage Gas Valves . . . . . . . . . . . . . . . . . . . . . . 47
25 Proper Flame Adjustment . . . . . . . . . . . . . . . . . . . . . . . 48
26 Typical Flame Appearance . . . . . . . . . . . . . . . . . . . . . . 48
27 ZR036 (3.0 Ton) Operating Pressures . . . . . . . . . . . . . . 51
28 ZR048 (4.0 Ton) Operating Pressures . . . . . . . . . . . . . . 52
29 ZR060 (5.0 Ton) Operating Pressures . . . . . . . . . . . . . . 52
30 Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
403134-YIM-E-0311

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Summary of Contents for Johnson Controls Unitary Products YORK ZR Series

  • Page 1: Table Of Contents

    R-410A ZR SERIES 3 - 5 Ton 60 Hertz TABLE OF CONTENTS General ......... . 2 Sequence Of Operations Overview.

  • Page 2: General

    Wear safety glasses and work gloves. Use quenching cloth and building, electrical, and mechanical codes. have a fire extinguisher available during brazing operations. Johnson Controls Unitary Products...
  • Page 3 Additional information is available in the following reference forms: • Technical Guide - ZR036-060, 251933 • General Installation - ZR036-060, 403134 This system uses R-410A Refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. Johnson Controls Unitary Products...
  • Page 4 Y = Options 4 & 5 Z = Options 3, 4 & 5 Options 1 = Disconnect 2 = Non-Pwr'd Conv. Outlet 3 = Smoke Detector S.A. 4 = Smoke Detector R.A. 5 = Pwr'd Conv. Outlet Johnson Controls Unitary Products...

  • Page 5: Installation

    30° F. 208/230-3-60 and 380/415-3-50 units with factory installed Powered Convenience Outlet Option are wired for 230v and 415v power supply respectively. Change tap on transformer for 208-3-60 or 380-3-50 operation. See unit wiring diagram. Johnson Controls Unitary Products...

  • Page 6: Zr036-060 Unit Limitations

    Figure 1: ZR036-060 Component Location Table 1: ZR036-060 Unit Limitations Unit Limitations Size Unit Voltage Applied Voltage Outdoor DB Temp (Tons) Max (°F) 208/230-1-60 208/230-3-60 (3.0) 460-3-60 575-3-60 208/230-1-60 208/230-3-60 (4.0) 460-3-60 575-3-60 208/230-1-60 208/230-3-60 (5.0) 460-3-60 575-3-60 Johnson Controls Unitary Products...

  • Page 7: Location

    7.3, or 7.4 of Gas Installation Codes, CSA-B149.1 (in Canada) - The condenser coils should be protected from rigging Latest Edition, and/or applicable provisions of the local building cable damage with plywood or other suitable material. Johnson Controls Unitary Products...

  • Page 8: Weights And Dimensions

    Unit Accessory Shipping Operating Economizer Power Exhaust Electric Heat Gas Heat 1. Weight given is for the maximum heater size available (30KW). 2. Weight given is for the maximum number of tube heat exchangers available (5 tube). Johnson Controls Unitary Products...

  • Page 9: Zr036-060 Cooling Only/Electric Heat Front View Physical Dimensions

    403134-YIM-E-0311 Figure 5: ZR036-060 Cooling Only/Electric Heat Front View Physical Dimensions Figure 6: ZR036-060 Cooling Only/Gas Heat Front View Physical Dimensions Johnson Controls Unitary Products...

  • Page 10: Zr036-060 Unit Clearances

    A, B, or C roof covering material. and Motor Access Panel for 2. Units must be installed outdoors. Overhanging structures Unit with “Belt-Drive” Option or shrubs should not obstruct condenser air discharge outlet. Figure 8: ZR036-060 Disconnect Location Johnson Controls Unitary Products...

  • Page 11: Zr036-060 Utilities Entry

    Gas Piping (Front) 1-1/2” KO Gas Piping (Bottom) 1. Opening in the bottom to the unit can be located by the slice in the insulation. 2. Do not remove the 2” knockout ring. Figure 10: ZR036-060 Roof Curb Johnson Controls Unitary Products...

  • Page 12: Ductwork

    Units are shipped with compressor mountings which are factory-adjusted and ready for operation. Units with scroll compressors have a shipping bracket which must be removed after the unit is set in place. See Figure 12. Figure 11: Condensate Drain Johnson Controls Unitary Products...

  • Page 13: Filters

    Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit Rating Plate and Table 1. Johnson Controls Unitary Products...

  • Page 14: Control Wire Sizes

    18 AWG 150 Feet The thermostat should be located on an inside wall approximately 56 inch above the floor where it will not be 1. From the unit to the thermostat and back to the unit. Johnson Controls Unitary Products...

  • Page 15: Typical Field Power And Control Wiring

    24 volt wire. 24 VOLT TRANSFORMER Yellow WIRES LOCATED IN PROGRAMMABLE * DEHUMIDISTAT UNIT CONTROL BOX THERMOSTAT ONLY LOW VOLTAGE SECTION Yellow * DEHUMIDISTAT CLOSES ON RISE IN HUMIDITY Figure 13: Typical Field Power and Control Wiring Johnson Controls Unitary Products...

  • Page 16: Electrical Data

    38.2 54.3 21.2 51.0 70.2 None 14.3 14.3 460-3-60 8.3 60.0 13.0 10.1 12.1 18.4 13.6 16.4 23.7 19.5 23.5 32.6 None 11.4 10.6 10.2 15.2 575-3-60 6.7 40.0 10.5 15.9 15.3 21.6 21.2 20.4 28.0 Johnson Controls Unitary Products...
  • Page 17 28.8 34.6 46.6 None 12.4 10.6 10.2 15.2 575-3-60 7.5 53.0 11.7 15.9 15.3 21.6 21.2 20.4 28.0 30.4 29.3 39.1 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...
  • Page 18 38.2 54.3 21.2 51.0 70.2 None 14.3 14.3 460-3-60 8.3 60.0 13.0 10.1 12.1 18.4 13.6 16.4 23.7 19.5 23.5 32.6 None 11.4 10.6 10.2 15.2 575-3-60 6.7 40.0 10.5 15.9 15.3 21.6 21.2 20.4 28.0 Johnson Controls Unitary Products...
  • Page 19 28.8 34.6 48.4 None 14.0 10.6 10.2 17.2 575-3-60 7.5 53.0 11.7 15.9 15.3 23.6 21.2 20.4 30.0 30.4 29.3 41.1 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...
  • Page 20 29.9 11.1 29.9 15.5 29.9 208-3-60 16.0 120.0 25.0 22.2 37.3 11.9 33.0 50.8 15.9 44.1 64.7 None 29.9 12.7 29.9 18.0 32.1 230-3-60 16.0 120.0 25.0 10.6 25.5 41.4 15.9 38.2 57.3 21.2 51.0 73.2 Johnson Controls Unitary Products...
  • Page 21 31.9 12.7 31.9 18.0 32.1 230-3-60 17.6 123.0 27.5 10.6 25.5 41.4 15.9 38.2 57.3 21.2 51.0 73.2 29.6 71.2 98.5 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...
  • Page 22 38.2 66.8 21.2 51.0 82.7 None 19.3 19.7 460-3-60 8.3 60.0 13.0 10.1 12.1 24.7 13.6 16.4 29.9 19.5 23.5 38.8 None 15.4 10.6 10.2 20.2 575-3-60 6.7 40.0 10.5 15.9 15.3 26.6 21.2 20.4 33.0 Johnson Controls Unitary Products...
  • Page 23 28.8 34.6 52.8 None 16.4 10.6 10.2 20.2 575-3-60 7.5 53.0 11.7 15.9 15.3 26.6 21.2 20.4 33.0 30.4 29.3 44.1 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...
  • Page 24 38.2 66.8 21.2 51.0 82.7 None 19.3 19.7 460-3-60 8.3 60.0 13.0 10.1 12.1 24.7 13.6 16.4 29.9 19.5 23.5 38.8 None 15.4 10.6 10.2 20.2 575-3-60 6.7 40.0 10.5 15.9 15.3 26.6 21.2 20.4 33.0 Johnson Controls Unitary Products...
  • Page 25 28.8 34.6 54.7 None 18.0 10.6 10.2 22.2 575-3-60 7.5 53.0 11.7 15.9 15.3 28.6 21.2 20.4 35.0 30.4 29.3 46.1 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...
  • Page 26 39.9 15.5 41.4 208-3-60 16.0 120.0 25.0 10.0 22.2 49.8 11.9 33.0 63.3 15.9 44.1 77.2 None 39.9 12.7 39.9 18.0 44.6 230-3-60 16.0 120.0 25.0 10.0 10.6 25.5 53.9 15.9 38.2 69.8 21.2 51.0 85.7 Johnson Controls Unitary Products...
  • Page 27 12.7 41.9 18.0 44.6 230-3-60 17.6 123.0 27.5 10.0 10.6 25.5 53.9 15.9 38.2 69.8 21.2 51.0 85.7 29.6 71.2 111.0 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Unitary Products...

  • Page 28: Zr036-060 Physical Data

    Fins per inch Tube diameter (in.) Circuitry Type Split-face Split-face Split-face EVAPORATOR COIL DATA Face area (Sq. Ft.) 5.06 5.06 5.06 Rows Fins per inch Tube diameter 0.375 0.375 0.375 Circuitry Type Split-face Split-face Split-face Refrigerant control Johnson Controls Unitary Products...
  • Page 29 Centrifugal Motor HP each 1050 1050 1050 FILTERS 15” x 20” x 1” or 2” 14” x 25” x 1” or 2” NOTE: All 2 Stage Gas Heat, 60% Capacity 1 Stage, 40% Capacity 2 Stage. Johnson Controls Unitary Products...

  • Page 30: Optional Electric Heat

    NOTE: Gas Heaters are shipped available for natural gas, but can be converted to L.P. with Kit Model No. 1NP0440 or 1NP0485 (2 Stage). All furnaces meet the latest California seasonal efficiency requirements. 1. Based on 1075 Btu/Ft. 2. The air flow must be adjusted to obtain a temperature rise within the range shown. Johnson Controls Unitary Products...

  • Page 31: Gas Pipe Sizing - Capacity Of Pipe

    After the gas connections have been completed, open the main shut-off valve admitting normal gas pressure to the mains. Check all joints for leaks with soap solution or other material suitable for the purpose. NEVER USE A FLAME. Johnson Controls Unitary Products...
  • Page 32 “wetted surface” area of the container(s). The products of combustion are discharged horizontally through The proper pressure regulation. (Two-stage regulation is this screened, hooded vent opening on the gas heat access panel. recommended). Johnson Controls Unitary Products...

  • Page 33: Options/Accessories

    When there is no call for free cooling, the damper will be made. position is limited by the IAQ Max damper position setting. When the signal exceeds it's set point (Demand Control Ventilation Set Point) setting and there is a call for free cooling, Johnson Controls Unitary Products...

  • Page 34: Enthalpy Set Point Chart

    Figure 19: Belt Adjustment Screw Indoor Air Quality Max. Adjustment Screw Indoor Air Quality Indoor Air Quality Min. Adjustment Screw Free Cool Free Cooling LED Economizer Enthalpy Set Point Adjustment Screw Figure 18: Honeywell Economizer Control W7212 Johnson Controls Unitary Products...

  • Page 35: Altitude/Temperature Correction Factors

    0.950 1000 ft 0.900 2000 ft 3000 ft 0.850 4000 ft 0.800 5000 ft 6000 ft 0.750 7000 ft 8000 ft 0.700 9000 ft 10000 ft 0.650 0.600 Air Temperature (ºF) Figure 20: Altitude/Temperature Correction Factors Johnson Controls Unitary Products...
  • Page 36 5 Turns 4 Turns 3 Turns 2 Turns 1 Turn Fully Model (Tons) Sheave Sheave Open Open Open Open Open Closed 1.73 1VL44 AK56 1060 1130 1195 1260 1VP56 AK56 1325 1395 1460 1525 1590 1660 Johnson Controls Unitary Products...

  • Page 37: Zr Blower Performance Side Duct

    1. Blower performance includes gas heat exchangers and 1” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. Johnson Controls Unitary Products...

  • Page 38: Zr Blower Performance Bottom Duct

    1. Blower performance includes gas heat exchangers and 1” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. Johnson Controls Unitary Products...

  • Page 39: Belt Drive Rpm Selection

    4.0 - 5.0 1VP56 AK66 1-1/2 1725 1.15 2.8 - 3.8 1VL44 AK56 (4.0) 1-1/2 1725 1.15 4.0 - 5.0 1VP56 AK61 1-1/2 1725 1.15 2.8 - 3.8 1VL44 AK56 (5.0) 1725 1.15 4.0 - 5.0 1VP56 AK56 Johnson Controls Unitary Products...

  • Page 40: Checking Supply Air Cfm

    1000 1500 2000 2500 3000 3500 Insert at least 8" of 1/4 inch tubing into each of these holes NOMINAL CFM for sufficient penetration into the air flow on both sides of the indoor coil. Figure 21: Pressure Drop Across Coil Johnson Controls Unitary Products...

  • Page 41: Operation

    (RHG) and will associated with the operation. energize both the liquid line and the hot gas solenoids which directs hot gas through part of the indoor coil and decreases the sensible capacity of the unit. Johnson Controls Unitary Products...

  • Page 42: Cooling Operation Errors

    10 minutes on, 5 minutes off. The indoor blower is operated by the thumbwheel on the damper motor. When the “R” to “G” circuit is opened, the damper spring returns fully closed. Johnson Controls Unitary Products...

  • Page 43: Electric Heating Sequence Of Operations

    Remove the call for cooling, by raising thermostat setting higher heater and energizing the blower. than the conditioned space temperature. This resets any pressure or freezestat flash codes. Johnson Controls Unitary Products...

  • Page 44: Gas Heating Sequence Of Operations

    30 second purging of the heat exchanger by and may result in the lowering of the temperature within the continuing the operation of the draft motor. The UCB continues the operation of the indoor blower for a configurable amount of Johnson Controls Unitary Products...

  • Page 45: Gas Heat Operation Errors

    In the event of the flame spilling out into the burner manifold blower and the ICB will energize the draft motor while the area the rollout switch will open, the ICB will close both the primary limit is open. When the primary limit closes and the Johnson Controls Unitary Products...

  • Page 46: Flash Codes

    Complete the following checks before starting the unit. Check the type of gas being supplied. Be sure that it is the same as listed on the unit nameplate. Johnson Controls Unitary Products...

  • Page 47: Typical Single Stage Gas Valves

    Check the supply gas pressure. It must be within the limits depends on the local fuel heating value. shown on rating nameplate. Supply pressure should be checked with all gas appliances in the building at full fire. At Johnson Controls Unitary Products...

  • Page 48: Checking Gas Input

    Remove the manifold-burner gas valve assembly by lifting of gas consumed per hour by the Btu content of the gas up and pulling back. in your particular locality (contact your gas company for this information - it varies widely from city to city.). Johnson Controls Unitary Products...

  • Page 49: Charging The Unit

    Refer to the In Door Blower Specification operate, replace the motor. Table 16. Johnson Controls Unitary Products...
  • Page 50 UCB Y1 terminal. If To test, disconnect the Mate-N-Locks and jumper between 24 volts is not present from the room thermostat, check for the WHITE and YELLOW wires of the UCB’s Mate-N-Lock the following: Johnson Controls Unitary Products...

  • Page 51: Zr036 (3.0 Ton) Operating Pressures

    15. If none of the above correct the error, replace the UCB. Normal Operating Pressures 3-Ton Operating Pressures 115 °F Outdoor 105 °F Outdoor 95 °F Outdoor 85 °F Outdoor 75 °F Outdoor 65 °F Outdoor Suction Pressure (psig) Figure 27: ZR036 (3.0 Ton) Operating Pressures Johnson Controls Unitary Products...

  • Page 52: Zr048 (4.0 Ton) Operating Pressures

    Figure 28: ZR048 (4.0 Ton) Operating Pressures 5-Ton Operating Pressure 115 °F Outdoor 105 °F Outdoor 95 °F Outdoor 85 °F Outdoor 75 °F Outdoor 65 °F Outdoor Suction Pressure (psig) Figure 29: ZR060 (5.0 Ton) Operating Pressures Johnson Controls Unitary Products...
  • Page 53 Restore power to unit and induce a call for heat. indicated. All troubleshooting procedures assume the unit is Measure the voltage across the two draft motor leads Johnson Controls Unitary Products...
  • Page 54 Verify both conditions are If the flame is weak or unstable in the flame sensor area, within the published ranges. then verify the gas inlet pressure. If gas inlet pressure is Johnson Controls Unitary Products...
  • Page 55 UCB, i.e. that the thermostat “W1” terminal is connected to the “W1” terminal of the UCB, and Place the thermostat fan switch in the “ON” position. If the for loose wiring. supply air blower motor energizes, go to Step 10. Johnson Controls Unitary Products...
  • Page 56 Current alarms or active restrictions are flashed on the ICB Make sure that the ground connections at the pilot burner, LED. No history is stored on the ICB. gas valve and ignition control are intact. Check the ignitor Johnson Controls Unitary Products...

  • Page 57: Fan On And Off Delays

    Compressors Locked Out Because The 11 Flashes Economizer Is Using Free Cooling Subject to change without notice. Printed in U.S.A. 403134-YIM-E-0311 Copyright © 2011 by Johnson Controls, Inc. All rights reserved. Supersedes: 403134-YIM-D-0111 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...

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