Table of Contents
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R-410A
ZF SERIES
15 - 25 Ton
60 Hertz
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 14
Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Optional Gas Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Damper Set Point Adjustment. . . . . . . . . . . . . . . . . . . . . . 31
Optional Variable Air Volume (VAV) . . . . . . . . . . . . . . . . . 31
Optional Hot Gas Bypass (HGBP) . . . . . . . . . . . . . . . . . . 33
1 ZF180-300 Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 ZF180-300 Unit Accessory Weights . . . . . . . . . . . . . . . . . 9
4 Utilities Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Supply Fan VFD Weights, In Lbs. . . . . . . . . . . . . . . . . . . . 9
6 ZF180-300 Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 11
7 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9 ZF180-300 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . 26
10 Electric Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . 27
11 Gas Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
12 Gas Pipe Sizing - CapacIty of Pipe . . . . . . . . . . . . . . . . . 28
13 Gas Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . . . 28
14 Altitude/Temperature Correction Factors . . . . . . . . . . . . 36
1 ZF180-300 Component Location . . . . . . . . . . . . . . . . . . . 6
2 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Unit 6 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 ZF180-300 Unit Dimensions Front View . . . . . . . . . . . . . 9
6 ZF180-300 Unit Dimensions Rear View . . . . . . . . . . . . . 10
7 ZF180-300 Unit Dimensions Rain Hood . . . . . . . . . . . . 11
8 ZF180 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 ZF210-300 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10 Fixed Outdoor Air Damper . . . . . . . . . . . . . . . . . . . . . . . 13
11 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Typical Field Wiring 24 Volt Thermostat . . . . . . . . . . . . 16
14 External Supply Connection External Shut-Off . . . . . . . 28
15 Bottom Supply Connection External Shut-Off . . . . . . . . 28
16 Vent and Combustion Air Hood . . . . . . . . . . . . . . . . . . . 30
TABLE OF CONTENTS
Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 46
No Outdoor Air Options . . . . . . . . . . . . . . . . . . . . . . . . . 46
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 48
Electric Heating Sequence Of Operations. . . . . . . . . . . . . 49
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . 49
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . 50
Gas Heating Operation Errors . . . . . . . . . . . . . . . . . . . . 51
Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Start-Up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Checking Gas Heat Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Charging The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Unit Control Board Option Setup . . . . . . . . . . . . . . . . . . . . . . 63
Option Byte Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Heat Delay Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Optional VAV Control Board Flash Codes . . . . . . . . . . . . 63
LIST OF TABLES
15 Air Flow Performance - Side Duct Application . . . . . . . . 38
16 Air Flow Performance - Bottom Duct Application . . . . . . 41
17 RPM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
18 Indoor Blower Specifications . . . . . . . . . . . . . . . . . . . . . . 44
19 Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . . 44
20 Limit Control Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
21 Electric Heat Anticipator Setpoint . . . . . . . . . . . . . . . . . . 50
22 Gas Heat Limit Control Setting . . . . . . . . . . . . . . . . . . . . 51
23 Gas Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . . . . 52
24 Gas Rate Cubic Feet Per Hour . . . . . . . . . . . . . . . . . . . . 53
25 Unit Control Board Flash Codes . . . . . . . . . . . . . . . . . . . 62
26 Heat Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
27 VAV Control Board Flash Codes . . . . . . . . . . . . . . . . . . 63
LIST OF FIGURES
17 Enthalpy Set Point Chart . . . . . . . . . . . . . . . . . . . . . . . . 34
18 Honeywell Economizer Control W7212 . . . . . . . . . . . . . 34
19 Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
20 Altitude/Temperature Correction Factors . . . . . . . . . . . . 36
Air CFM For All Unit Tonnages . . . . . . . . . . . . . . . . . . . 45
22 Gas Valve Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
23 Gas Valve and Controls . . . . . . . . . . . . . . . . . . . . . . . . . 52
24 Proper Pilot Flame Adjustment . . . . . . . . . . . . . . . . . . . 54
25 Typical Flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
26 Typical Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
27 ZF180 (15 Ton) Charging Chart . . . . . . . . . . . . . . . . . . . 55
28 ZF210 (17.5 Ton) Charging Chart . . . . . . . . . . . . . . . . . 55
29 ZF240 (20 Ton) Charging Chart . . . . . . . . . . . . . . . . . . . 55
30 ZF300 (25 Ton) Charging Chart . . . . . . . . . . . . . . . . . . . 55
31 Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
853632-YIM-B-0213
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Summary of Contents for Johnson Controls ZF180
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Page 1: Table Of Contents
22 Gas Valve Piping ......51 8 ZF180 Roof Curb ......12 23 Gas Valve and Controls . -
Page 2: General
This product must be installed in strict compliance with safety precautions and codes including ANSI Z223.1 or CSA- the installation instructions and any applicable local, B149.1- latest edition. state and national codes including, but not limited to building, electrical, and mechanical codes. Johnson Controls Unitary Products... - Page 3 Reference Additional information is available in the following reference forms: • Technical Guide - ZF180-300, 251934 This system uses R-410A Refrigerant which operates at higher pressures than R-22. No other refrigerant may be • General Installation - ZF180-300, 853632 used in this system.
- Page 4 M = Options 1, 2, 3, & 4 Z = Options 3, 4 & 5 Options 1 = Disconnect 4 = Smoke Detector R.A. 2 = Non-Pwr'd Conv. Outlet 5 = Pwr'd Conv. Outlet 3 = Smoke Detector S.A. Johnson Controls Unitary Products...
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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 UNIT SHOWN BLOWER MOTOR LOCATION OF VFD (Optional) FULL PERIMETER 14 GAUGE BASE LOCATION OF VFD BYPASS (Optional) RAILS WITH LIFTING HOLES Figure 1: ZF180-300 Component Location Table 1: ZF180-300 Unit Limitations Unit Limitations Size Unit Voltage Applied Voltage Outdoor DB Temp (Tons) Max (°F)
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Page 7: Location
7.3, or 7.4 of Gas Installation Codes, CSA-B149.1 (in Canada) - Latest Edition, and/or applicable provisions of the local building The condenser coils should be protected from rigging cable damage with plywood or other suitable material. Johnson Controls Unitary Products... -
Page 8: Center Of Gravity
FRONT LEFT Figure 4: Center of Gravity Table 2: Weights and Dimensions Weight Size Center of Gravity 4 Point Load Location (lbs.) 6 Point Load Location (lbs.) Model (lbs.) (Tons) Shipping (15) (17.5) 2538 (20) (25) Johnson Controls Unitary Products... -
Page 9: Zf180-300 Unit Dimensions Front View
. Figure 5: ZF180-300 Unit Dimensions Front View Table 5: Supply Fan VFD Weights, In Lbs. -
Page 10: Zf180-300 Unit Dimensions Rear View
Connector Duct Flange Kit. 39-5/8” Access ZF 210-300 Figure 6: ZF180-300 Unit Dimensions Rear View NOTE: Units are shipped with the bottom duct openings covered. An accessory flange kit is available for connecting side ducts. For bottom duct applications: For side duct applications:... -
Page 11: Zf180-300 Unit Dimensions Rain Hood
Trapped) 5” 28-3/16” 92” Rear View LH View Detail “Y” Unit with Rain Hoods Figure 7: ZF180-300 Unit Dimensions Rain Hood Table 6: ZF180-300 Unit Clearances Direction Distance (in.) Direction Distance (in.) 72 With 36 Maximum Horizontal Overhang Right (For Condenser Air Discharge) -
Page 12: Ductwork
853632-YIM-B-0213 14-1/4” 115-1/4” Figure 8: ZF180 Roof Curb 25-1/4" Figure 9: ZF210-300 Roof Curb Ductwork Refer to Figure 5 for bottom air duct openings. Refer to Figure 6 for side air duct openings. Ductwork should be designed and sized according to the... -
Page 13: Condensate Drain
Side Return Air Screen POE (polyolester) compressor lubricants are known to cause Access Panel Outdoor Air long term damage to some synthetic roofing materials. Opening Cover * Gasketed Rear View Flange Figure 10: Fixed Outdoor Air Damper Johnson Controls Unitary Products... -
Page 14: Filters
208/230-3-60 and 380/415-3-50 units control transformers are factory 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 15: Field Wiring Disconnect - Cooling Unit With/Without
Refer to Table 7: Control Wire Sizes Table 7 for control wire sizing and maximum length. Wire Size Maximum Length 18 AWG 150 Feet 1. From the unit to the thermostat and back to the unit. Johnson Controls Unitary Products... - Page 16 Figure 13: Typical Field Wiring 24 Volt Thermostat 208/230-3-60 and 380/415-3-50 units control transformers are factory 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 17 853632-YIM-B-0213 Table 8: Electrical Data ZF180-300 - Standard Drive Without Powered Convenience Outlet OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 18 853632-YIM-B-0213 ZF180-300 - Standard Drive Without Powered Convenience Outlet (Continued) OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 19 853632-YIM-B-0213 ZF180-300 - Standard Drive With Powered Convenience Outlet OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 20 853632-YIM-B-0213 ZF180-300 - Standard Drive With Powered Convenience Outlet (Continued) OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 21 853632-YIM-B-0213 ZF180-300 - Hi Static Drive Without Powered Convenience Outlet OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 22 853632-YIM-B-0213 ZF180-300 - Hi Static Drive Without Powered Convenience Outlet (Continued) OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 23 853632-YIM-B-0213 ZF180-300 - Hi Static Drive With Powered Convenience Outlet OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 24 853632-YIM-B-0213 ZF180-300 - Hi Static Drive With Powered Convenience Outlet (Continued) OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 25 853632-YIM-B-0213 ZF180-300 - Low Static Drive Without Powered Convenience Outlet OD Fan Supply Compressors Max Fuse Motors Blower Conv Electric Heat Option (each) Size Breaker (each) Motor Outlet Volt (Tons) (Amps) Size (Amps) Model Stages Amps TBD TBD TBD TBD TBD TBD...
- Page 26 853632-YIM-B-0213 Table 9: ZF180-300 Physical Data Models Component ZF180 ZF210 ZF240 ZF300 Nominal Tonnage 17.5 AHRI COOLING PERFORMANCE Gross Capacity @ AHRI A point (K Btu) 254.5 AHRI net capacity (K Btu) 246.5 10.0 SEER IEER 11.0 Nominal CFM 8000 System power (KW) 24.7...
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Page 27: Optional Electric Heat
853632-YIM-B-0213 Table 9: ZF180-300 Physical Data (Continued) Models Component ZF180 ZF210 ZF240 ZF300 Nominal Tonnage 17.5 CONDENSER FAN DATA Quantity Fan diameter (Inch) Type Prop Drive type Direct No. speeds Number of motors Motor HP each 1.25 1140 Nominal total CFM... -
Page 28: Optional Gas Heat
(17.5) 6000 8750 6000 8750 6000 9400 6000 9400 (20) 6000 9400 6000 9400 Main 7500 12500 7500 12500 Manual (25) 7500 12500 7500 12500 Shut-off Valve Drip Leg Figure 14: External Supply Connection External Shut-Off Johnson Controls Unitary Products... - Page 29 LP. Shellac base personal injury or loss of life. compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clyde’s, or John Crane may be used. Johnson Controls Unitary Products...
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Page 30: Options/Accessories
Enthalpy Set Point Adjustment Figure 17. Adjust as follows: Figure 16: Vent and Combustion Air Hood • For a single enthalpy operation carefully turn the set point adjusting screw (found on the damper control Johnson Controls Unitary Products... -
Page 31: Optional Bas-Ready Economizer Power Exhaust Damper Set Point Adjustment
(VFD) is available for applications requiring a constant • ST - analog input provided by field-installed space supply duct static pressure. A differential pressure transducer is temperature sensor. used to monitor supply duct static pressure and return a speed Johnson Controls Unitary Products... - Page 32 LINE (BYPASS) position. If there is a call for the pressure reaches the high-limit set point, then the supply fan fan, the indoor blower motor will run at full-speed while in the motor will be shutdown. bypass mode. Johnson Controls Unitary Products...
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Page 33: Optional Hot Gas Bypass (Hgbp)
• LR '4' to UCB 'C' The opening pressure of the bypass valve is fully adjustable between 0 and 80 psig with a factory-setting of 60 psig. HGBP is standard on all units with VAV and optional with CV units. Johnson Controls Unitary Products... -
Page 34: Enthalpy Set Point Chart
Damper Min. Position 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 Air density correction factors are shown in Table 14 and Figure 20. *Never Loosen (C)* Figure 19: Belt Adjustment Johnson Controls Unitary Products...
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Page 36: Altitude/Temperature Correction Factors
This value must be corrected for elevation. Example 2: A system, located at 5,000 feet of elevation, is to deliver 6,000 CFM at a static pressure of 1.5". Use the unit BHP at 5,000 ft. = 3.2 x .832 = 2.66 Johnson Controls Unitary Products... -
Page 37: Rpm Selection
Size Motor Blower 6 Turns 5 Turns 4 Turns 3 Turns 2 Turns 1 Turn Fully Model (Tons) Sheave Sheave Open Open Open Open Open Open Closed 5.75 1VP60 BK110 8.63 1VP60 BK090 1035 1075 1120 Johnson Controls Unitary Products... -
Page 38: Air Flow Performance - Side Duct Application
853632-YIM-B-0213 Table 15: Air Flow Performance - Side Duct Application ZF180 (15 Ton) Side Duct Available External Static Pressure - IWG Air Flow (CFM) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP Standard 5 HP &... - Page 39 1. Blower performance includes gas heat exchangers and 2” 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 0.838. Johnson Controls Unitary Products...
- Page 40 1. Blower performance includes gas heat exchangers and 2” 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 0.82. Johnson Controls Unitary Products...
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Page 41: Air Flow Performance - Bottom Duct Application
853632-YIM-B-0213 Table 16: Air Flow Performance - Bottom Duct Application ZF180 (15 Ton) Bottom Duct Available External Static Pressure - IWG Air Flow (CFM) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP Standard 5 HP &... - Page 42 1. Blower performance includes gas heat exchangers and 2” 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 0.838. Johnson Controls Unitary Products...
- Page 43 1. Blower performance includes gas heat exchangers and 2” 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 0.82. Johnson Controls Unitary Products...
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Page 44: Air Balance
To assure a dry coil, the compressors should someone other than the equipment installer. be deactivated while the test is being run. Johnson Controls Unitary Products... -
Page 45: Electric Heat
3. The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation. Johnson Controls Unitary Products... -
Page 46: Operation
'Occupied' Mode. Additionally, the Computer running Windows software with a standard USB unit can be switched between Unoccupied/Occupied mode port. through network communications with Simplicity™ PC and other BAS control systems. Simplicity® PC Software (http://www.yorkupg.com/ software.asp) Johnson Controls Unitary Products... -
Page 47: No Outdoor Air Options
If the outdoor air enthalpy is above the set outdoor temperature is less than both the First-Stage SAT point, “Y1” energizes compressor #1. Control setpoint plus 5 °F, and the Economizer OAT Enable setpoint. Johnson Controls Unitary Products... -
Page 48: Cooling Operation Errors
During cooling operation, if a freezestat opens, the UCB will de- gravity closes the dampers when the exhaust fan is off. energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans. If the call Johnson Controls Unitary Products... -
Page 49: Electric Heating Sequence Of Operations
(internal) protection. If there is an abnormal b The thermostat will cycle the electric heat to satisfy the temperature rise in a compressor, the protector will open to shut heating requirements of the conditioned space. Johnson Controls Unitary Products... -
Page 50: Electric Heat Operation Errors
3, 4, 5, 6 0.29 0.29 ° ° Opens, Opens, 0.29 0.29 0.29 575-3-60 0.29 0.29 0.29 0.29 Gas Heating Sequence Of Operations 17.5, 20 and 25 The following sequence describes the operation of the gas heat section. Johnson Controls Unitary Products... -
Page 51: Gas Heating Operation Errors
GV, the UCB will de-energize the indoor blower maximum of 85 seconds to ignite the pilot tube. If the pilot flame following the elapse of the fan off delay for heating. is not detected, then “IC2” will lock out first stage furnace Johnson Controls Unitary Products... -
Page 52: Gas Heat Anticipator Setpoints
Refer to Table 23 for the required gas heat and is set to open at 190°F. It is a manual reset switch. If AUX anticipator setting. trips, then the primary limit has not functioned correctly. Replace the primary limit. Johnson Controls Unitary Products... -
Page 53: Start-Up (Cooling)
Check the type of gas being supplied. Be sure that it is the Open gas heat access panel. same as listed on the unit nameplate. Turn gas valve clockwise to “OFF” position (See Figure 27). Make sure that the vent and combustion hoods have been properly installed. Johnson Controls Unitary Products... -
Page 54: Checking Gas Heat Input
To decrease the gas pressure, turn the adjusting screw counterclockwise. To increase the gas pressure, turn the adjusting screw clockwise. NOTE: The correct manifold pressure for these furnaces is 3.65 IWG ± 0.3. Johnson Controls Unitary Products... -
Page 55: Typical Flame
(3) be sure to replace cover screw after adjustment to prevent possible gas leakage. Put the system into operation and observe through complete Figure 27: Typical Gas Valve cycle to be sure all controls function properly. Johnson Controls Unitary Products... -
Page 56: Charging The Unit
2. This chart is applicable to unit with the TXV's left to the factory setting. If the TXV's have been adjusted in the field, The charging chart may no longer apply. Figure 28: ZF180 (15 Ton) Charging Chart Figure 30: ZF240 (20 Ton) Charging Chart Figure 29: ZF210 (17.5 Ton) Charging Chart... -
Page 57: Troubleshooting
M3 is pulled in, and the blower motor does not operate, UCB terminal, C1. If 24 volts is present, check for loose check all power & control wiring connections to and from wiring between C1 and the compressor contactor. Johnson Controls Unitary Products... - Page 58 If 24 volts is not present at the C2 terminal, check for 24 the Mate-N-Lock plug to the Y1 “ECON” terminal. If nothing volts from the room thermostat at the UCB Y2 terminal. If is found, the economizer control may have faulted and is Johnson Controls Unitary Products...
- Page 59 #1 is unavailable for cooling calls. Check may be improperly wired. Check for 24 volts at the Y1 “OUT” the UCB for alarms indicating that compressor #1 is locked terminal of the UCB. If 24 volts is present, trace the wiring Johnson Controls Unitary Products...
- Page 60 'RESET' on the drive's keypad and take any corrective short delay (the room thermostat fan switch is in “AUTO” action as needed. If the motor still does not operate, position). replace the motor. Johnson Controls Unitary Products...
- Page 61 “PILOT CHECKOUT” page 55. for proper furnace operation. If lock-out continues to occur, Check the supply pressure as described in “POST START locate the source of the problem and correct. CHECK LIST” page 53. Make adjustments as necessary. Johnson Controls Unitary Products...
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Page 62: Unit Control Board Flash Codes
Main burners light but exhibit erratic flame characteristics. RESET button once. Adjust air shutters as described in “BURNER AIR SHUTTER ADJUSTMENT” page 55. Flash codes that do and do not represent alarms are listed in Table 25. Johnson Controls Unitary Products... -
Page 63: Unit Control Board
EEPROM Storage Failure No Power or Control Failure 1. Non-alarm condition. Check Alarm History Reset All ASCDs For One Cycle Non Alarm Condition Green LED Flashing Current Alarm Flashed Red LED Figure 32: Unit Control Board Johnson Controls Unitary Products... -
Page 64: Unit Control Board Option Setup
15 Flashes Dirty Filter Switch No Power or Control Failure Subject to change without notice. Printed in U.S.A. 853632-YIM-B-0213 Copyright © 2013 by Johnson Controls, Inc. All rights reserved. Supersedes: 853632-YIM-A-0412 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...
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