York International ZX Series User manual

5943356-UIM-A-1020 York International Corporation, 5005
York Drive, Norman, OK 73069
2020-10-01
Johnson Controls Ducted Systems
INSTALLATION MANUAL ZX SERIES
6-12.5Ton 60 Hertz R-410A

2 INSTALLATION MANUAL ZX SERIES 6-12.5Ton 60 Hertz R-410A
Johnson Controls Ducted Systems

Contents
ContentsGeneral........................................................................... 5
Safety Considerations............................................. 5
Inspection................................................................ 6
Reference................................................................. 6
Renewal Parts.......................................................... 6
Approvals................................................................. 6
Nomenclature.......................................................... 8
Installation..................................................................... 9
Installation Safety Information............................. 9
Preceding Installation............................................. 9
Limitations....................................................... 12
Location.................................................................. 12
Clearances........................................................ 12
Rigging and Handling........................................... 13
ZXA7, 08-14 Unit Weights..................................... 14
Ductwork................................................................ 20
Duct Covers...................................................... 20
Condensate Drain................................................. 21
Compressors.......................................................... 22
Filters...................................................................... 22
Power And Control Wiring................................... 22
Thermostat Wiring.......................................... 23
Typical Field Power and Control Wiring................... 24
Typical Power Wiring............................................ 24
Electrical Data........................................................ 26
ZXA7, 08 to 14 Standard Static Indoor
Blower - With Powered Convenience
Outlet................................................................. 26
ZXA7, 08 to 14 High Static Indoor Blower
- With Powered Convenience Outlet.............. 29
ZXA7, 08 to 14 High Static Indoor Blower
- Without Powered Convenience Outlet........ 32
ZXA7, ZX08 to 14 Medium Static Indoor
Blower - Without Powered Convenience
Outlet................................................................. 35
ZXA7, ZX08 to 14 Medium Static Indoor
Blower - With Powered Convenience
Outlet................................................................. 38
ZXA7, 08 to 14 Standard Static Indoor
Blower - Without Powered Convenience
Outlet................................................................. 41
Physical data ZXA7, 08 to 14................................ 44
Optional Gas Heat................................................. 54
Gas Piping........................................................ 54
Gas Connection............................................... 54
Combustion Air and Flue Exhaust................. 55
Options/Accessories............................................. 56
Economizer...................................................... 56
Power Exhaust................................................. 56
Rain Hood......................................................... 56
Blower Phasing...................................................... 56
Blower Rotation............................................... 57
Belt Tension..................................................... 58
Altitude and Temperature Correction for
CFM, Static Pressure and Power..................... 58
Airflow Performance............................................. 61
ZXA7, 08-14 Side Duct Application (Belt
Drive)................................................................. 62
ZXA7, 08-14 Bottom Duct Application
(Belt Drive)........................................................ 65
RPM selection.................................................. 68
Supply Air Drive Adjustment.......................... 68
Everyday Thermostat Control (ETC).............. 71
Smart Equipment™ unit control board......... 75
Operation..................................................................... 80
Cooling sequence of operation........................... 80
Electric Heating Sequence of Operations.......... 83
Electric Heat Operating Errors....................... 83
Gas Heating Sequence of Operations................ 83
Gas Heat Operation Errors............................. 84
Indoor Air Quality AQ........................................... 86
Gas Heating Operation......................................... 86
Gas Heat Ignition Control Board Function............... 87
Ignition Control Board on Standby..................... 87
Call for heat........................................................... 87
Pressure switch proving....................................... 87
Pre-purge............................................................... 87
Ignition trial period............................................... 87
Flame stabilization period.................................... 87
Main Burner operation......................................... 87
Post Purge.............................................................. 88
Lockout................................................................... 88
High temperature limit switch............................ 88
Roll-out switch....................................................... 88
Power interruptions.............................................. 88
Flame present with Gas off.................................. 88
Welded gas valve relay response........................ 88
Cooling start-up.......................................................... 89
Prestart Check List................................................ 89
Operating instructions......................................... 89
Johnson Controls Ducted Systems
INSTALLATION MANUAL ZX SERIES 6-12.5Ton 60 Hertz R-410A 3

Post Start Check List...................................................... 89
Gas heat start-up................................................................. 90
Pre-Start Check List........................................................ 90
Operating instructions.................................................. 90
Lighting The Main Burners........................................... 90
Post Start Checklist........................................................ 90
Shut Down...................................................................... 90
Checking Gas Heat Input.................................................... 91
Two Stage Gas Heat....................................................... 91
Manifold Gas Pressure Adjustment............................. 92
Two Stage.................................................................. 92
Adjustment Of Temperature Rise................................ 93
Burners/Orifices Inspection/Servicing........................ 93
Troubleshooting................................................................... 95
Charging Tables ZXA7, ZX08 to 14................................ 98
Smart Equipment™ Control Board Navigation
Components........................................................................ 103
Start-Up Sheet.................................................................... 104
INSTALLATION MANUAL ZX SERIES 6-12.5Ton 60 Hertz R-410A4
Johnson Controls Ducted Systems

General
ZX units are single package air conditioners
with optional gas heating designed for outdoor
installation on a rooftop or slab and for non-
residential use.
These units are completely assembled on rigid,
permanently attached base rails. All piping,
refrigerant charge, and electrical wiring is
factory installed and tested. The units require
electric power, gas supply (where applicable),
and duct connections.
Safety Considerations
This is a safety alert symbol. When you see
this symbol on labels or in manuals, be alert to
the potential for personal injury.
Understand and pay particular attention the
signal words DANGER, WARNING or CAUTION.
DANGER indicates an imminently hazardous
situation, which, if not avoided, will result in
death or serious injury.
WARNING indicates a potentially hazardous
situation, which, if not avoided, could result in
death or serious injury.
CAUTION indicates a potentially hazardous
situation, which, if not avoided may result
in minor or moderate injury. It is also used
to alert against unsafe practices and hazards
involving only property damage.
WARNING
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage. Improper
installation, adjustment, alteration, service
or maintenance can cause injury or property
damage. Refer to this manual for assistance
or for additional information, consult a qualified
contractor, installer or service agency.
CAUTION
This product must be installed in strict
compliance with the installation instructions and
any applicable local, state and national codes
including, but not limited to building, electrical,
and mechanical codes.
WARNING
Before performing service or maintenance
operations on unit, turn off main power switch
to unit. Electrical shock could cause personal
injury. Improper installation, adjustment,
alteration, service or maintenance can cause
injury or property damage. Refer to this manual.
For assistance or additional information consult
a qualified installer, service agency or the gas
supplier.
CAUTION
This system uses R-410A Refrigerant which
operates at higher pressures than R-22. No
other refrigerant may be used in this system.
Gauge sets, hoses, refrigerant containers
and recovery systems must be designed to
handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in
property damage or injury.
WARNING
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS:
a. Do not try to light any appliance.
b. Do not touch any electrical switch; do not use
any phone in your building.
c. Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
d. If you cannot reach your gas supplier, call the
fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
5INSTALLATION MANUAL ZX SERIES 6-12.5Ton 60 Hertz R-410A
Johnson Controls Ducted Systems