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York ZF 240 Series - User Manual

York ZF 240 Series
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R-410A
ZF SERIES
15 & 20 Ton/53 & 70 KW
50 Hertz
1061903-XIM-A-0713
TABLE OF CONTENTS
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Optional Gas Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Economizer And Power Exhaust Set Point Adjustments . 22
ZF180-240 Side Duct Application . . . . . . . . . . . . . . . . . . . 28
Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 34
No Outdoor Air Options . . . . . . . . . . . . . . . . . . . . . . . . . 34
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 35
Electric Heating Sequence Of Operations . . . . . . . . . . . . 36
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . 36
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . 37
Gas Heating Operation Errors . . . . . . . . . . . . . . . . . . . . 37
Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Start-Up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Checking Gas Heat Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Unit Control Board Option Setup . . . . . . . . . . . . . . . . . . . . . . 49
Option Byte Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Heat Delay Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
LIST OF TABLES
1 ZF180-240 Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . . 6
2 ZF180-240 Unit Weights Imperial . . . . . . . . . . . . . . . . . . . 8
3 ZF180-240 Unit Weights Metric . . . . . . . . . . . . . . . . . . . . 8
4 ZF180-240 Unit Accessory Weights Metric . . . . . . . . . . . . 8
5 ZF180-240 Unit Accessory Weights Imperial . . . . . . . . . . 8
6 Utilities Entry Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 ZF180-240 Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 11
8 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
10 ZF180-240 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . 18
11 Electric Heat Minimum Supply Air Imperial . . . . . . . . . . . 19
12 Electric Heat Minimum Supply Air Metric . . . . . . . . . . . . 19
13 Gas Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
14 Gas Pipe Sizing - Capacity of Pipe . . . . . . . . . . . . . . . . . 20
15 Gas Heat Minimum Supply Air Imperial . . . . . . . . . . . . . 20
16 Gas Heat Minimum Supply Air Metric . . . . . . . . . . . . . . . 20
17 Altitude/Temperature Correction Factors Imperial . . . . . 25
18 Altitude/Temperature Correction Factors Metric . . . . . . . 25
19 Air Flow Performance - Side Duct Application . . . . . . . . 28
20 Air Flow Performance - Bottom Duct Application . . . . . . 30
21 RPM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
22 Indoor Blower Specifications . . . . . . . . . . . . . . . . . . . . . . 32
23 Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . 32
24 Additional Static Resistance Imperial . . . . . . . . . . . . . . . 33
25 Additional Static Resistance Metric . . . . . . . . . . . . . . . . 33
26 Limit Control Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
27 Electric Heat Anticipator Setpoint . . . . . . . . . . . . . . . . . . 37
28 Gas Heat Limit Control Setting . . . . . . . . . . . . . . . . . . . . 38
29 Gas Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . . . . 39
30 Gas Rate Cubic Feet Per Hour . . . . . . . . . . . . . . . . . . . . 40
31 Unit Control Board Flash Codes . . . . . . . . . . . . . . . . . . . 48
32 Heat Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
LIST OF FIGURES
1 ZF180-240 Component Location . . . . . . . . . . . . . . . . . . . 6
2 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Unit 6 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Unit Dimensions - ZF Cool & Electric Heat . . . . . . . . . . . 9
6 Unit Dimensions - ZF Gas Heat . . . . . . . . . . . . . . . . . . . . 9
7 ZF180-240 Unit Dimensions Rear View . . . . . . . . . . . . . 10
8 ZF180-240 Unit Dimensions Rain Hood . . . . . . . . . . . . 11
9 Roof Curb Dimensions (All Models) . . . . . . . . . . . . . . . . 12
10 Roof Curb Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
11 Unit Curb And Applications . . . . . . . . . . . . . . . . . . . . . . 12
12 Fixed Outdoor Air Damper . . . . . . . . . . . . . . . . . . . . . . . 13
13 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
14 Field Wiring Disconnect - Cooling Unit With/Without Electric
Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15 Typical Field Wiring 24 Volt Thermostat . . . . . . . . . . . . 16
16 External Supply Connection External Shut-Off . . . . . . . 20
17 Bottom Supply Connection External Shut-Off . . . . . . . . 20
18 Vent and Combustion Air Hood . . . . . . . . . . . . . . . . . . . 22
19 Enthalpy Set Point Chart . . . . . . . . . . . . . . . . . . . . . . . . 23
20 Honeywell Economizer Control W7212 . . . . . . . . . . . . . 24
21 Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
22 Altitude/Temperature Correction Factors Imperial . . . . . 26
23 Altitude/Temperature Correction Factors Metric . . . . . . 26
24 Pressure Drop Across A Dry Indoor Coil Vs. Supply Air CFM
For All Unit Tonnages . . . . . . . . . . . . . . . . . . . . . . . . . . 32
25 Gas Valve Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
26 Gas Heat Limit And Auxiliary Location Down Discharge
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
27 Gas Heat Limit and Auxiliary Location Side Discharge
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
28 Gas Valve and Controls . . . . . . . . . . . . . . . . . . . . . . . . . 39
29 Proper Pilot Flame Adjustment . . . . . . . . . . . . . . . . . . . 41
30 Typical Flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
31 Typical Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
32 Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
33 Start-Up & Service Data Instruction . . . . . . . . . . . . . . . . 50

Table of Contents

Questions and Answers

  • A
    angelicachenAug 7, 2025
    What to do if compressor #1 on my York Air Conditioner doesn't start when cooling is needed?
    • K
      kingkaitlinAug 7, 2025
      If compressor #1 doesn't start when cooling is needed (and no economizer is installed or the economizer isn't providing free cooling), check the following: * Verify line voltage at the compressor contactor, M1, ensuring the contactor is engaged. Inspect for loose wiring between the contactor and the compressor. * If the compressor housing is hot, it may be off due to its inherent protection. Cancel any cooling requests and allow it to cool down and reset. Then, test again. * Check for 24 volts at the M1 coil. If the voltage is present but M1 isn't engaged, replace the contactor. * If M1 is engaged and voltage is supplied, yet the compressor doesn't operate, replace the compressor.
  • K
    Keith JohnsonAug 12, 2025
    What to do if the York Air Conditioner supply air blower motor won't start after a delay?
    • J
      Jared GreeneAug 12, 2025
      If the supply air blower motor in your York Air Conditioner doesn't start after a short delay, try the following: * Ensure the thermostat fan switch is in the ON position. * Verify line voltage is supplied to the M3 contactor and that the contactor is engaged. For units with VFD, check voltage to the M3-Auxiliary contacts. Also, inspect for loose wiring between the contactor and the motor. * If the motor housing is hot, the motor may be off due to internal protection. Cancel any thermostat calls, set the fan to AUTO, and allow the motor to cool down and reset. * Check for 24 volts at the M3 coil. If voltage is present but M3 isn't engaged, replace the contactor. * If M3 is engaged and voltage is supplied, but the motor still doesn't operate, replace the motor.
  • P
    Patrick ReidAug 17, 2025
    Why is the compressor #1 not working on my York ZF 240 while the blower motor is running?
    • S
      Sherri MarksAug 18, 2025
      If the supply air blower motor is running, but compressor #1 isn't, here's what you can check: * See if compressor #1 is locked out by checking the UCB for alarms. * Confirm line voltage is present at the compressor contactor (M1) and that the contactor is engaged. Inspect for any loose wiring between the contactor and the compressor. * If the compressor housing is hot, it might be off due to inherent protection. Cancel any cooling calls and allow the compressor to cool down and reset. * Verify 24 volts are present at the M1 coil. If voltage is present but M1 isn't engaged, replace the contactor. * If M1 is engaged and voltage is supplied, but the compressor remains off, replace the compressor.
  • J
    Justin GoodmanAug 28, 2025
    What to do if pilot light is on, but main burners won't ignite on my York Air Conditioner?
    • B
      Brett SteinAug 28, 2025
      If the pilot burner ignites, but the ignitor continues to spark and the main burners do not ignite, you can: * Perform the same checks and adjustments as described in the previous section. * Check the supply pressure as described in “POST START CHECK LIST” page 40. Make adjustments as necessary. * Ensure that the pilot burner is not bent or damaged. * Confirm that the ground connections at the pilot burner, gas valve, and ignitor control are intact.
  • J
    Jackson DunnSep 1, 2025
    Why won't my York ZF 240 Air Conditioner furnace light, even though the draft motor is running?
    • J
      Jo RiceSep 1, 2025
      If the draft motor runs, but the furnace doesn't light and the sparker doesn't spark: * The ignition control may be locked out due to flame roll out. Remove 24V from the ignition controls at the unit or by resetting the room thermostat. After resetting 24V, check for proper furnace operation. * Check for 24 volts at terminal 4 of (RW12) and (RW2-1). If 24 volts is not present, the centrifugal switch has not closed or has gone bad. Check the line voltage to the unit - if it is correct, replace the draft motor.
  • V
    Vanessa WoodNov 21, 2025
    How to fix a York Air Conditioner when the draft motor runs but the blower motor doesn't start?
    • Z
      Zachary WuNov 21, 2025
      If the draft motor runs but the supply air blower motor doesn't start after a short delay, try these steps: * Ensure the thermostat fan switch is in the “ON” position. * Verify line voltage is being supplied to the contacts of the M3 contactor, and that the contactor is pulled in. For units with VFD, check that line voltage is being supplied to the M3-Auxiliary contacts. Check for loose wiring between the contactor and the supply air blower motor. * If the motor housing is hot, the motor may be off on inherent protection. Cancel any thermostat calls and set the fan switch to “AUTO”, wait for the internal overload to reset. Test again when cool. * Check for 24 volts at the M3 coil. If 24 volts is present at M3 but M3 is not pulled in, replace the contactor. * If line voltage is s...

Summary

General Information and Safety

Safety Considerations

Understanding hazard symbols and safety protocols.

Installation Safety Information

Critical precautions before installing the unit.

System Connections

Power And Control Wiring

Connecting electrical power and control circuits.

Gas Connection

Installing gas supply lines and recommendations.

Unit Operation Modes

Cooling Sequence Of Operation

How the cooling system functions.

Gas Heating Sequence Of Operations

How the gas heating system functions.

Troubleshooting and Diagnostics

Cooling Troubleshooting Guide

Diagnosing and resolving cooling issues.

Unit Control Board Flash Codes

Interpreting diagnostic error codes.

Startup and Maintenance

Start-Up (Cooling)

Procedures for initiating cooling operation.

Checking Gas Heat Input

Verifying gas heat performance.

Critical Safety Warnings

SAFETY WARNINGS

Overarching safety precautions.

York ZF 240 Series Specifications

General IconGeneral
BrandYork
ModelZF 240 Series
CategoryAir Conditioner
LanguageEnglish

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