Ingersoll-Rand YS*150 Manual

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-
conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment
by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and
on the tags, stickers, and labels that are attached to the equipment.
Packaged Rooftop Air Conditioners
Voyager™ –Gas/Electric
12½ – 25 Tons, 60/50Hz
January 2014 RT-SVX26J-EN
Installation, Operation,
and Maintenance
Model Number: YS*150–300
YH*150-300

© 2014 Trane All rights reserved RT-SVX26J-EN
Warnings, Cautions and Notices
Warnings, Cautions and Notices. Notethatwarnings,
cautions and notices appear at appropriate intervals
throughout this manual. Warnings are provide to alert
installingcontractorstopotentialhazardsthatcouldresult
in personal injury or death. Cautions are designedto alert
personnel to hazardous situations that could result in
personalinjury,whilenoticesindicateasituation thatmay
result in equipment or property-damage-only accidents.
Your personal safety and the proper operation of this
machine depend upon the strict observance of these
precautions.
Important
Environmental Concerns!
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment.Traneadvocatestheresponsiblehandlingof
all refrigerants-including industry replacements for CFCs
such as HCFCs and HFCs.
Responsible Refrigerant Practices!
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified. The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
ATTENTION: Warnings, Cautions and Notices appear at
appropriate sections throughout this literature. Read
these carefully:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
NOTICE: Indicatesasituationthatcouldresultin
equipment or property-damage only
WARNING
Personal Protective Equipment (PPE)
Required!
Installing/servicing this unit could result in exposure to
electrical, mechanical and chemical hazards.
• Before installing/servicing this unit, technicians
MUSTputonallPersonalProtectiveEquipment(PPE)
recommended for the work being undertaken.
ALWAYS refer toappropriateMSDSsheetsand OSHA
guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS sheets and
OSHA guidelines for information on allowable
personal exposure levels, proper respiratory
protection and handling recommendations.
• If there is a risk of arc or flash, technicians MUST put
on all Personal Protective Equipment (PPE) in
accordance with NFPA 70E or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit.
Failure to follow instructions could result in death or
serious injury.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
NOTICE:
Water Damage!
Non-factory penetrations through the base of this unit
are not allowed. Any penetration in the base of the unit
may affect the water tight integrity of the unit and lead
to water leaks into the conditioned space. Failure to
follow instructions could result in equipment and
property damage.

Warnings, Cautions and Notices
RT-SVX26J-EN 3
Overview of Manual
Note: Onecopyofthisdocumentshipsinsidethecontrol
panelofeachunitandiscustomerproperty.Itmust
be retained by the unit’s maintenance personnel.
This booklet describes proper installation, operation, and
maintenance procedures for air cooled systems.
By carefully reviewing the information within this manual
and following the instructions, the risk of improper
operation and/or component damage will be minimized.
It is important that periodic maintenance be performed to
help assure trouble free operation. A maintenance
schedule is provided at the end of this manual.
Should equipment failure occur, contact a qualified
service organization with qualified, experienced HVAC
technicians to properly diagnose and repair this
equipment.
Revision Summary
RT-SVX26J-EN (17 January 2014)
• Updated General Information and Model Number
Description sections.
• Deleted Warranty section.

4RT-SVX26J-EN
Table of Contents
Model Number Description . . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . . . 7
Unit Description . . . . . . . . . . . . . . . . . . . . . . . 7
System Input Devices & Functions . . . . . . . 7
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . 11
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 11
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . 19
General Unit Requirements . . . . . . . . . . . . 19
Main Unit Power . . . . . . . . . . . . . . . . . . . . . 21
Smoke Detector . . . . . . . . . . . . . . . . . . . . . . 23
Space Temperature Averaging . . . . . . . . . 26
Factory-Mounted Unit Options . . . . . . . . . . . 31
Circuit Breaker (FIYUCB) & Unit Disconnect
(FIYUDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Powered and Unpowered Convenience . . 32
Return Air Smoke Detector . . . . . . . . . . . . . 33
Through the Base Gas Utility Option . . . . 36
Pre Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Verifying Proper Air Flow (Units with Belt
Drive Indoor Fan) . . . . . . . . . . . . . . . . . . . . . 37
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Economizer Start-Up . . . . . . . . . . . . . . . . . . 38
Compressor Start-Up . . . . . . . . . . . . . . . . . 38
Dehumidification Option . . . . . . . . . . . . . . . 39
Heating Start-Up . . . . . . . . . . . . . . . . . . . . . 39
Variable Air Volume Applications (Multi-zone,
Traditional VAV) . . . . . . . . . . . . . . . . . . . . . . 39
Final System Set Up . . . . . . . . . . . . . . . . . . 41
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Fan Belt Adjustment—Belt Drive Units . . 42
Monthly Maintenance . . . . . . . . . . . . . . . . . 43
Final Process . . . . . . . . . . . . . . . . . . . . . . . . . 44
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .45
ReliaTel Control . . . . . . . . . . . . . . . . . . . . . . .45
System Status Checkout Procedure . . . . . .45
Resetting Cooling and Heating Lockouts . .47
Zone Temperature Sensor (ZTS) Service Indi-
cator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Zone Temperature Sensor (ZTS) Test . . . .47
Programmable & Digital Zone Sensor Test 48
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . .50

RT-SVX26J-EN 5
Model Number Descriptions
All products are identified by a
multiplecharactermodelnumberthat
preciselyidentifiesaparticulartypeof
unit. An explanation of the
alphanumeric identification code is
provided. Its use will enable the
owner/operator, installing
contractors, and service engineers to
define the operation, specific
components, and other options for
any specific unit.
When ordering replacement parts or
requesting service, be sure to refer to
the specific model number and serial
number printed on the unit
nameplate.
Digit 1 — Unit Type
Y = Packaged Gas/Electric
Digit 2 — Efficiency
S = Standard Efficiency
H = High Efficiency
Digit 3 — Airflow Configuration
D=Downflow
H=Horizontal
Digit 4, 5, 6 — Nominal Gross
Cooling Capacity (MBh)
150 = 12½ Tons, 60Hz
155 = 15 Tons, 50Hz
180 = 15 Tons, 60Hz
175 = 17½ Tons, 50Hz
210 = 17½ Tons, 60Hz
200= 20 Tons, 50Hz
240 = 20 Tons, 60Hz
250= 25 Tons, 50Hz
300 = 25 Tons, 60Hz
Digit 7 — Major Design
Sequence
F = Microchannel Type Condenser
Coils
Digit 8 — Voltage Selection
3 = 208-230/60/3
4 = 460/60/3
W = 575/60/3
K = 380/60/3
D = 380-415/50/3
Digit 9 — Unit Controls
R = Reliatel
Digit 10 — Heating Capacity
H = Gas Heat - High
L=GasHeat-Low
V = Gas Heat - SS Ht Ex - Modulating
X = Gas Heat - SS Ht Ex - Low
Z = Gas Heat - SS Ht Ex - High
YS D 150 F 3 R H A A
12 3 456 7 8 9 10 11 12
Digit 11 — Minor Design
Sequence
Digit 12, 13 — Service Sequence
00 = None
01 = 18mm Microchannel Condenser
Coil
Note: ‘01’ only available on select
models.
Digit 14 — Fresh Air Selection
0=NoFreshAir
D = Econ Dry Bulb w/ Barometric
Relief1
F = Econ Reference Enthaply w/
Barometric Relief1
H = Econ Comparative Enthaply w/
Barometric Relief1
Digit 15 — Supply Fan/Drive
Type/Motor
0=StandardMotor
1 = Oversized Motor6
3 = High Efficiency Motor6
6 = Single Zone Variable Air Volume
Standard Motor
7 = Multi-Speed Standard Motor
8 = Single Zone Variable Air Volume
Oversized Motor
9 = Multi-Speed Oversized Motor
A = Single Zone Variable Air Volume
Standard Motor w/ Shaft
Grounding Ring
B = Multi-Speed Standard Motor w/
Shaft Grounding Ring
C = Single Zone Variable Air Volume
Oversized Motor w/ Shaft
Grounding Ring
D = Multi-Speed Oversized Motor w/
Shaft Grounding Ring
E = VAV Supply Air Temperature
Control - Standard Motor
F = VAV Supply Air Temperature
Control - Oversized Motor
G = VAV Supply Air Temperature
Control - Standard Motor w/ Shaft
Grounding Ring
H = VAV Supply Air Temperature
Control - Oversized Motor w/
Shaft Grounding Ring
Digit 16 — Hinged Service
Access / Filters
0 = Standard Panels/Standard Filters
A = Hinged Access/Standard Filters
B = Standard Panels/MERV 8 Filters6
C = Hinged Access/MERV 8 Filters6
D = Standard Panels/MERV 13 Filters6
E = Hinged Access/MERV 13 Filters6
Digit 17 — Condenser Coil
Protection
0 = Standard Coil
1 = Standard Coil With Hail Guard
4 = CompleteCoat™Condenser Coil
5 = CompleteCoat™Condenser Coil
with Hail Guard
Digit 18 — Through The Base
Provisions
0 = No Through The Base Provisions
A = Through The Base Electric12
B = Through The Base Gas
C = Through The Base Electric/Gas12
D = Through The Base Access
Digit 19 — Disconnect Switch/
Circuit Breaker11
0 = No Disconnect/circuit break
1 = Unit Mounted Non-Fused
Disconnect Switch
2 = Unit Mounted Circuit Breaker
Digit 20 — Convenience Outlet
Option
0 = Without Convenience Outlet
A = Unpowered Convenience Outlet5
B = Powered Convenience Outlet5
Digit 21 — Communications
Options
0 = Without Communications Options
3 = Novar 2024 Controls Interface18
4 = Novar 3051 Controls Interface18
5 = Novar 3051 Communications
Interface with Demand Control
Ventilation18
6 = Building Automation Control
Network Communications
Interface
Digit 22 — Refrigeration System
Option
0 = Standard refrigeration system
A = Thermal Expansion Valve (TXV)14
B = Dehumidification (Hot Gas
Reheat)4,14
Digit 23 — Refrigeration Controls
0 = Without Refrigeration Controls
1=Frostat
9,20
Digit 24 — Smoke Detector2,10
0 = Without Smoke Detector
A = Return Air Smoke Detector
B = Supply Air Smoke Detector
C = Return/Supply Air Smoke
Detector
D = Plenum Smoke Detector21
Digit 25 — System Monitoring
Controls
0 = No Monitoring Controls
1 = Clogged Filter Switch9
2 = Fan Failure Switch9
3 = Discharge Air Sensing9
4 = Clogged Filter Switch and Fan
Failure switch9
Model Number Description

6RT-SVX26J-EN
Model Number Description
5 = Clogged Filter Switch and
Discharge Air Sensing9
6 = Fan Failure Switch and Discharge
Air Sensing9
7 = Clogged Filter Switch, Fan Failure
Switch and Discharge Air
Sensing9
8 = NOVAR Return Air Sensor (Novar
2024)13,18
9 = NOVAR Zone Temp Sensor
(Novar 3051)18
A = Condensate Drain Pan Overflow
Switch
B = Clogged Filter Switch and
Condensate Drain Pan Overflow
Switch9
C = Fan Failure Switch and
Condensate Drain Pan Overflow
Switch9
D = Discharge Air Sensing and
Condensate Drain Pan Overflow
Switch9
E = Clogged Filter Switch, Fan Failure
Switch and Condensate Drain Pan
Overflow Switch9
F = Clogged Filter Switch, Discharge
Air Sensing Tube and Condensate
Drain Pan Overflow Switch9
G = Fan Failure Switch, Discharge Air
Sensing Tube and Condensate
Drain Pan Overflow Switch9
H = Clogged Filter Switch, Fan Failure
Switch, Discharge Air Sensing
and Condensate Drain Pan
Overflow Switch9
Digit 26 - System Monitoring
Controls
0 = No Monitoring Controls
A = Demand Control Ventilation
(CO2)19
Digit 27 - Unit Hardware
Enhancements
0 = No Enhancements
1 = Stainless Steel Drain Pan
Digit 28 - Short Circuit Current
Rating
0 = Standard SCCR
A = 65kA SCCR Option22,23
Digit 31 - Advanced Unit
Controls
0 = Standard Unit Controls
1=HumanInterface
Note: Most Factory Installed Options
available for Downflow Air
Dischargeunitsonly. Pleaseverify
with ordering system for
availability.
Model Number Notes
1. Some field set up required.
2. RequiresReliaTelOptionsModule.
3. Requires Economizer.
4. All 22nd digit model numbers for
reheat coil (B) require additional
factory installed options: Frostat,
and 2” pleated filters.
5. Must be ordered with Through-
the-Base Electrical option or
Horizontal-Side Access and either
Unit Mounted Disconnect or
Circuit Breaker.
6. Available factory installed on
downflow AND horizontal units.
Verify with ordering system.
7. Cannot be fused.
8. Must be factory installed when
using Through-the-Base Options.
9. ReliaTel Options Module is
required when ordering the
following accessories: Clogged
Filter Switch, Fan Fail Switch,
Condensate Overflow Switch,
DischargeAirSensingKit,Frostat,
Ventilation Override, Smoke
Detector, Dehumidification and
Modulating Gas Heat Furnace.
10. Option cannot be ordered in
conjunction with field installed
economizer on downflow units.
Must be factory installed. The
returnair smokedetectormay not
fit up or work properly on the
Voyager units when used in
conjunction with 3rd party
accessories (such as bolt on heat
wheels, economizers, and power
exhaust). Do not order the return
air smoke detectors when using
this type of accessory.
11. Unit mounted disconnect and
circuit breakers are mutually
exclusive of each other.
12. Through-the-base electrical
option or Horizontal-Side Access
must be ordered with either unit
mounted disconnect or circuit
breaker. When adding heat, you
must order Electric Heat.
13. This option consists of the Novar
returnairsensor(Novar#WTS-10)
that is wired and shipped in the
return air section of the unit. The
sensor ships with approximately
15’ of extra wire for dropping
down the return air duct
(downflow only).
14. Available on high efficiency,
downflow units only.
15. All Factory Installed Options are
Built-to-Order. Check order
services for estimated production
cycle.
16. TheNovarcontroloptionincludes
thefollowingfactoryinstalledand
wireddevices:Novar ETM-2024or
Novar 3051rooftopcontroller,fan
proving switch, clogged filter or
unit shutdown switch, Cool 1,
Cool 2, Heat switch and discharge
air sensor (Novar 2024 is
downflow only).
Note: Option cannot be ordered in
conjunction with a factory
installed smoke detector.
17. For use with multi-speed and
SZVAV units only.
18. NovarisnotavailablewithSZVAV
products.
19. Demand Control Ventilation
Option includes wiring only. The
C02sensor is a field-installed only
option.
20. Frostat is standard on VAV units.
21. Supply and/or return smoke
detector may notbeused withthe
plenum smoke detector.
22. Only available where MOP is
above 60A.
23. 575 VAC option is 25kA.

RT-SVX26J-EN 7
General Information
Unit Description
Before shipment, each unit is leak tested, dehydrated,
charged with refrigerant and compressor oil, and run
tested for proper control operation.
Formajordesignsequence Funits,thecondensercoilsare
microchannel type aluminum coils.
Direct-drive, vertical discharge condenser fans are
provided with built-in thermal overload protection.
TheReliaTel™ControlModuleisamicroelectroniccontrol
system that is referred to as “Refrigeration Module”
(RTRM). The acronym RTRM is used extensively
throughout this document when referring to the control
system network.
This module through Proportional/Integral control
algorithms perform specific unit functions that governs
unitoperationinresponseto;zonetemperature,supplyair
temperature, and/or humidity conditions depending on
the application.
Thestages of capacitycontrolfor theseunitsare achieved
by starting and stopping the compressors.
The RTRM is mounted in the control panel and is factory
wired to the respective internal components. The RTRM
receives and interprets information from other unit
modules, sensors, remote panels, and customer binary
contacts to satisfy the applicable request for cooling.
Economizer Control Actuator ReliaTel™
Control
The ECA monitors the mixed air temperature, return air
temperature, minimum position setpoint (local or
remote), power exhaust setpoint, CO2setpoint, CO2, and
ambient dry bulb/ enthalpy sensor or comparative
humidity (return air humidity against ambient humidity)
sensors, if selected, to control dampers to an accuracy of
±5 percentofstroke.Theactuatorisspringreturnedtothe
closed position any time that power is lost tothe unit. It is
capable of delivering up to 25 in·lb of torque and is
powered by 24 Vac.
RTCI—ReliaTel™ Trane Communication
Interface (Optional)
ThismoduleisusedwhentheapplicationcallsforanICS™
building management type control system. It allows the
control and monitoring of the system through an ICS
panel. The module can be ordered from the factory or
ordered as akittobe fieldinstalled.Followthe installation
instruction that ships with each kit when field installation
is necessary.
RLCI—ReliaTel™ LonTalk Communication
Interface (Optional)
ThismoduleisusedwhentheapplicationcallsforanICS™
buildingmanagementtypecontrolsystemthatisLonTalk.
Itallowsthecontrolandmonitoringofthesystemthrough
anICSpanel. Themodulecanbe ordered fromthefactory
or ordered as a kit to be field installed. Follow the
installation instruction that ships with each kit when field
installation is necessary.
RBCI—ReliaTelBACnet™ Communications
Interface (Optional)
Thismoduleisusedwhentheapplicationcallsforanopen
BACnet protocol. It allows the control and monitoring of
the system through an ICS panel. The module can be
ordered from the factory or as a kit to be field installed.
Followtheinstallation instructionsthatshipswith each kit
when field installation is necessary.
RTOM—ReliaTel™ Options Module
(Optional)
TheRTOMmonitorsthesupplyfanproving,cloggedfilter,
supply air temperature, exhaust fan setpoint, supply air
tempering, Frostat™and smoke detector.Referto system
input devices and functions for operation.
RTAM—ReliaTel™ Air Handler Module
(Standard with Traditional VAV)
RTAM receives information from the supply duct static
pressure transducer. Attached to the module are the
supply air heating potentiometer, supply air cooling
setpoint potentiometer, supply pressure setpoint
potentiometer, static pressure deadband potentiometer,
morning warm-up setpoint potentiometer, reset setpoint
potentiometer, and 5 DIP switches.
System Input Devices &
Functions
TheRTRMmust havea zone sensoror thermostatinputin
order to operate the unit. The flexibility of having several
modecapabilitiesdependsuponthetypeofzonesensoror
thermostat selected to interface with the RTRM.
ThedescriptionsofthefollowingbasicInputDevicesused
withintheRTRMnetworkaretoacquainttheoperatorwith
their function as they interface with the various modules.
Refer to the unit’s electrical schematic for the specific
module connections. The following controls are available
from the factory for field installation.
Supply Fan Failure Input (Optional)
The Fan Failure Switch (FFS) can be connected to sense
indoor fan operation. If air flow through the unit is not

General Information
8RT-SVX26J-EN
provenbythedifferentialpressureswitchconnectedtothe
RTOM (factory set point 0.07“ w.c.) within 40 seconds
nominally, the RTRM will shut off all mechanical
operations, lock the system out, send a diagnostic to ICS,
andtheSERVICEoutputwill flash. The systemwillremain
locked out until a reset is initiated either manually or
through ICS.
Drain Pan Condensate Overflow Switch
(Optional)
This input incorporates the Condensate Overflow Switch
(COF) mounted on the drain pan and the ReliaTel Options
Module (RTOM). When the condensate level reaches the
trip point for 6 continuous seconds, the RTOM will shut
down all unit function until the overflow condition has
cleared. The unit will return to normal operation after 6
continuous seconds with the COF in a non-tripped
condition. If the condensate level causes the unit to
shutdownmorethan 2timesina3dayperiod,theunitwill
be locked-out of operation. A manual reset of the
diagnostic system through the Zone Sensor or Building
Automation System (BAS) will be required. Cycling unit
power will also clear the fault."
Clogged Filter Switch (Optional)
The unit mounted clogged filter switch monitors the
pressure differential across the return air filters. It is
mounted in the filter section and is connected to the
RTOM. A diagnostic SERVICE signal is sent to the remote
panelifthepressuredifferentialacrossthefiltersisatleast
0.5” w.c.
The contacts will automatically open when the pressure
differential across the filters decreases to approximately
0.4” w.c.
Theclogged filteroutputis energizedwhen the supplyfan
is operating and the clogged filter switch has been closed
forat least2 minutes.The systemwillcontinue tooperate
regardless of the status of the filter switch.
Please note that on units equipped with factory installed
MERV 13 filters, a clogged filter switch with different
pressure settings will be installed. This switch will close
when the differential pressure is approximately 0.8” w.c.
and open when the differential falls to 0.7” w.c.
Compressor Disable (CPR1/2)
This input incorporates the low pressure control (LPC) of
each refrigeration circuit and can be activated by opening
a field supplied contact installed on the LTB.
If this circuit is open before the compressor is started, the
compressor will not be allowed to operate. Anytime this
circuit is opened for 1 continuous second during
compressor operation, the compressor for that circuit is
immediately turned “Off”. The compressor will not be
allowed to restart for a minimum of 3 minutes should the
contacts close.
If four consecutive open conditions occur during the first
threeminutesof operation,thecompressorfor thatcircuit
will be locked out, a diagnostic communicated to the
remote panel (if installed), and a manual reset will be
required to restart the compressor.
Phase Monitor
The Phase Monitor is a three-phase line monitor module
thatprotectsagainstphaseloss,phasereversalandphase
unbalance. It is intended to protect compressors from
reverserotation.Ithasanoperatinginputvoltagerangeof
190–600 Vac, and LED indicators for ON and FAULT. There
arenofieldadjustmentsandthemodulewillautomatically
reset from a fault condition.
Low Pressure Control ReliaTel Control
When the LPC is opened for 1 continuous second, the
compressor for that circuit is turned off immediately. The
compressor will not be allowed to restart for a minimum
of 3 minutes.
If four consecutive open conditions occur during the first
three minutes ofoperation, the compressor will be locked
out,adiagnosticcommunicatedtoICS™ifapplicable,and
a manual reset will be required to restart the compressor.
Discharge Line Thermostat ReliaTel
Control
Thehighpressurecontrolsanddischargelinethermostats
arewiredinseriesbetweenthecompressoroutputsonthe
RTRM and the compressor contactor coils. If the high
pressurecontrolswitchordischargelinethermostatopen,
theRTRMsenses alackof currentwhile calling for cooling
andlocksthecompressorout.Thisisanautoresetlockout.
If the circuit is open three consecutive times when the
contactor coil should be on, the RTRM sets a manual
lockout for that compressor.
Power Exhaust Control (Optional)
Thepowerexhaustfan isstartedwhenever the positionof
the economizer dampers meets or exceed the power
exhaust setpoint when the indoor fan is on.
The setpoint panel is located in the return air section and
is factory set at 25 percent.
Lead/Lag Control (Dual Circuit Only)
Lead/Lag is a selectable input located on the RTRM. The
RTRM is configured from the factory with the Lead/Lag
controldisabled.ToactivatetheLead/Lagfunction,simply
cut the wire connected to J3-8 at the RTRM. When it is
activated, each time the designated lead compressor is
shut off due to the load being satisfied, the lead
compressor or refrigeration circuit switches. When the
RTRM is powered up, i.e. after a power failure, the control
will default to the number one circuit compressor.

General Information
RT-SVX26J-EN 9
Evaporator Frost Control
This input incorporates the Frostat™ control (FOS)
mountedintheindoorcoilandcanbeactivatedbyclosing
a field supplied contact installed in parallel with the FOS.
Ifthiscircuitisclosedbeforethecompressorisstarted,the
compressor will not be allowed to operate. Anytime this
circuit is closed for 1 continuous second during
compressor operation, the compressor for that circuit is
immediately turned “Off”. The compressor will not be
allowed to restart for a minimum of 3 minutes should the
FOS open.
Sensors
Note: Zone sensor required for units configured for
Single Zone VAV indoor fan system control to
enable Single Zone VAV functionality.
Zone Sensor Module (ZSM)
(BAYSENS106*)
This electronic sensor features three system switch
settings(Heat,Cool,and Off)andtwofansettings(Onand
Auto). It is a manual changeover control with single
setpoint. (Cooling Setpoint Only.)
Zone Sensor Module (ZSM)
(BAYSENS108*)
Thiselectronicsensorfeaturesfoursystemswitchsettings
(Heat, Cool, Auto, and Off) and two fan settings (On and
Auto). It is a manual or auto changeover control with dual
setpoint capability. It can be used with a remote zone
temperature sensor BAYSENS075*.
Zone Sensor (BAYSENS110*)
Thiselectronicsensorfeaturesfoursystemswitchsettings
(Heat, Cool, Auto, and Off) and two fan settings (On and
Auto) with four system status LEDs. It is a manual or auto
changeover control with dual setpoint capability. It can be
used with a remote zone temperature sensor
BAYSENS075*.
Programmable Zone Sensor
(BAYSENS119*)
ProgrammableNightSetback:Autoormanualchangeover
withseven-dayprogramming.KeyboardselectionofHeat,
Cool, Fan, Auto, or On. All programmable sensors have
System On, Heat, Cool, Service LED/indicators as
standard. Night Setback Sensors have one (1) Occupied,
one (1) Un-occupied, and one (1) Override program per
day.
Remote Zone Sensor (BAYSENS073*)
This electronic sensor features remote zone sensing and
timed override with override cancellation. It is used with a
Trane Integrated Comfort™ building management
system.
Remote Zone Sensor (BAYSENS074*)
This electronic sensor features single setpoint capability
and timed override with override cancellation. It is used
with a Trane Integrated Comfort™ building management
system.
Remote Zone Sensor (BAYSENS016*)
This bullet type temperature sensor can be used for
outside air (ambient) sensing, return air temperature
sensing, supply air temperature sensing, and remote
temperaturesensing(uncovered).Wiringproceduresvary
according to the particular application and equipment
involved. Refer to the unit’s wiring diagrams for proper
connections.
Remote Zone Sensor (BAYSENS075*)
This electronic sensor can be used with BAYSENS119*
Remote Panels. When this sensor is wired to a
BAYSENS119* Remote Panel, wiring must be 18 AWG
ShieldedTwistedPair(Belden 8760orequivalent).Referto
the specific Remote Panel for wiring details.
Wireless Zone Sensor (BAYSENS050)
Thiselectronicsensorfeaturesfivesystem settings(Auto,
Off, Cool, Heat, and Emergency Heat) and with On and
Autofansettings.Itisamanualorautochangeovercontrol
with dual setpoint capability. Other features include a
timed override function, lockable system settings, and
Fahrenheit or Celsius temperature display. Included with
the wireless zone sensor will be a receiver that is to be
mounted inside the unit, a mounting bracket, and a wire
harness.
High Temperature Sensor (BAYFRST003*)
This sensor connects to the RTRM Emergency Stop Input
ontheLTBandprovideshighlimit“shutdown”oftheunit.
The sensor is used to detect high temperatures due to fire
in the air conditioning or ventilation ducts. The sensor is
designedtomountdirectlytothesheetmetalduct.Eachkit
contains two sensors. The return air duct sensor
(X1310004001) is set to open at 135°F.
Thesupplyairductsensor(X1310004002)isset to open at
240°F. The control can be reset after the temperature has
been lowered approximately 25°F below the cutout
setpoint.
Thermostat (BAYSTAT150)
This thermostat is a multi-stage 3 heat/2 cool, auto-
changeover digital display thermostat. It is a
programmable thermostat, and a 7-day programmable
stat with night setback shall be available. In addition, it is
wall mounted.

General Information
10 RT-SVX26J-EN
Thermostat (BAYSTAT151)
This thermostat is a single-stage 1 heat/1 cool, auto-
changeover digital display thermostat. It is a non-
programmable, wall-mounted thermostat.
Thermostat (BAYSTAT155)
This thermostat is a multi-stage 3 heat/2 cool, auto
changeover digital display thermostat. It is a non-
programmable, wall-mounted thermostat, and it can be
used for Economizer Operation.
Smoke Detector Sensor (Optional)
This sensor is only applicable on units equipped with a
RTOM. It provides high limit “shutdown” of the unit and
requires a manual reset. The sensor is used to detect
smoke due to fire in the air conditioning or ventilation
ducts.
Notes:
•The supply and return air smoke detectors are
designed to shut off the unit if smoke is sensed in the
supply air stream or return air stream. This function is
performedbysamplingthe airflowenteringtheunitat
the return air opening. Follow the instructions
provided below to assure that the airflow through the
unit is sufficient for adequate sampling. Failure to
follow these instructions will prevent the smoke
detectors from performing it's design function.
•Airflow through the unit is affected by the amount of
dirt and debris accumulated on the indoor coil and
filters. To insure that airflow through the unit is
adequate for proper sampling by the return air smoke
detector, complete adherence to the maintenance
procedures, including recommended intervals
between filter changes, and coil cleaning is required.
•Periodic checks and maintenance procedures must be
performed on the smoke detector to insure that it will
functionproperly.Fordetailedinstructionsconcerning
these checks and procedures, refer to the appropriate
section(s) of the smoke detector Installation and
Maintenance Instructions provided with the literature
package for this unit.
In order for the supply air smoke detector or return air
smoke detector to properly sense smoke in the supply air
stream or return air stream, the air velocity entering the
smoke detector unit must be between 500 and 4000 feet
per minute.
Equipment covered in this manual will develop an airflow
velocitythatfallswithintheselimitsovertheentireairflow
range specified in the evaporator fan performance tables.
There are certain models, however, if operated at low
airflow,willnotdevelopanairflowvelocitythatfallswithin
the required 500 to 4000 feet per minute range. For these
models, the design airflow shall be greater than or equal
totheminimumcfmspecifiedinthetableprovidedbelow.
Failuretofollowtheseinstructionswill prevent thesmoke
detector from performing its design function.
Wall Mounted Relative Humidity Sensor
(BAYSENS036*)
Field installed, wall mounted humidity sensor is used to
control activation of the hot gas reheat dehumidification
option.
Humidity set points can be selected for relative humidity
levelsbetween40 percent and 60 percentby adjustingthe
DEHUMID setting on the ReliaTel Options Module; see
“RTOM—ReliaTel™ Options Module (Optional),” p. 7.
Duct Mounted Relative Humidity Sensor
(BAYSENS037*)
Field installed, duct mounted humidity sensor is used to
control activation of the hot gas reheat dehumidification
option.
Humidity set points can be selected for relative humidity
levelsbetween40 percent and 60 percentby adjustingthe
DEHUMID setting on the ReliaTel Options Module; see
“RTOM—ReliaTel™ Options Module (Optional),” p. 7.
Human Interface - 5 Inch Color
Touchscreen (Optional)
The5inchColorTouchscreenHumanInterfaceprovidesan
intuitive user interface to the rooftop unit that speeds up
unitcommissioning,shortensunittroubleshootingtimes,
and enhances preventative maintenance measures. The
human interface includes several features including:
• Data trending capabilities by means of time series
graphs
• Historical alarm messages
• Real-time sensor measurements
• On board system setpoints
• USB port that enables the downloading of component
runtime information as well as trended historical
sensor data
• Customized reports
Unit Model
Number Minimum Allowable Airflow with Return Air Smoke Detector
YHD180 5300 cfm

General Information
RT-SVX26J-EN 11
Unit Inspection
As soon as the unit arrives at the job site:
• Verifythatthenameplate datamatchesthedataon the
salesorderandbilloflading(includingelectricaldata).
• Verify that the power supply complies with the unit
nameplate specifications.
• Visually inspect the exterior of the unit, including the
roof, for signs of shipping damage.
• Visually inspect the internal components for shipping
damage as soon as possible after delivery and before
it is stored. Do not walk on the sheet metal base pans.
• If concealed damage is discovered, notify the carrier’s
terminal of damage immediately by phone and by
mail. Concealed damage must be reported within 15
days.
– Request an immediate joint inspection of the
damage by the carrier and the consignee.
– Do not remove damaged material from the
receiving location.
– Take photos of the damage, if possible. The owner
mustprovidereasonableevidencethatthedamage
did not occur after delivery.
• Notify the appropriate sales representative before
installing or repairing a damaged unit.
Precautionary Measures
• Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoidcontactwiththeskinoreyes.Wearlong-sleeved,
loose-fitting clothing, gloves, and eye protection.
• Wash clothes separately from other clothing: rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respiration in these situations.
First Aid Measures
• Eye Contact - Flush eyes with water to remove dust. If
symptoms persist, seek medical attention.
• Skin Contact - Wash affected areas gently with soap
and warm water after handling.
Storage
Take precautions to prevent condensate from forming
inside the unit’s electrical compartments and motors if:
• The unit is stored before it is installed; or,
• The unit is set on the roof curb, and temporary heat is
provided in the building. Isolate all side panel service
entrances and base pan openings (e.g., conduit holes,
S/A and R/ A openings, and flue openings) from the
ambient air until the unit is ready for start-up.
Note: Do not use the unit’s heater for temporary heat
without first completing the start-up procedure
detailed under “Start Up,” p. 38.
The manufacturer will not assume any responsibility for
equipment damage resulting from condensate
accumulation on the unit’s electrical and/or mechanical
components.
Unit Clearances
Figure 1, p. 12 illustrates the minimum operating and
service clearances for either a single or multiple unit
installation. These clearances are the minimum distances
necessary to assure adequate serviceability, cataloged
unit capacity, and peak operating efficiency.
Providing less than the recommended clearances may
result in condenser coil starvation, “short-circuiting” of
exhaust and economizer airflows, or recirculation of hot
condenser air.
WARNING
Fiberglass Wool!
Product contains fiberglass wool. Disturbing the
insulation in this product during installation,
maintenance or repair will expose you to airborne
particles of glass wool fibers and ceramic fibers known
to the state of California to cause cancer through
inhalation. You MUST wear all necessary Personal
Protective Equipment (PPE) including gloves, eye
protection, a NIOSH approved dust/mist respirator, long
sleeves and pants when working with products
containing fiberglass wool. Exposition to glass wool
fibers without all necessary PPE equipment could result
in cancer, respiratory, skin or eye irritation, which could
result in death or serious injury.

12 RT-SVX26J-EN
Unit Dimensions
Figure 1. Typical installation clearance for single and multiple unit applications
5' 8"
5' 0"

Unit Dimensions
RT-SVX26J-EN 13
Note: ½ NPT Gas Connection
Figure 2. Unit dimensional data for 12½ tons standard efficiency units
Figure 3. Unit dimensional data for 12½ tons standard efficiency units
2710 mm
(106 11/16”)
1273 mm
(50 1/8”)
168 mm
(6 5/8”)
651 mm
(25 5/8”)
1799 mm
(70 13/16”)
213 mm
(8 3/8”)
745 mm
(29 5/16”)
68 mm
(2 11/16”)
25 mm
(1”)
1453 mm
(57 3/16”)
152 mm
(6”)
(SEE NOTE)
22 mm (7/8”) DIA. HOLE
(UNIT CONTROL WIRE)
51 mm (2”) DIA. HOLE
(UNIT POWER WIRE)
DOWNFLOW CONDENSATE
DRAIN CONN 25 mm (1”) NPT
SERVICE GAUGE
PORT ACCESS

Unit Dimensions
14 RT-SVX26J-EN
Note: ½ NPT Gas Connection
Figure 4. Horizontal duct dimensional data 12½ tons standard efficiency units
Figure 5. Unit dimensional data 15–25 tons standard efficiency units
3091 mm
(121 11/16”)
1372 mm
(54”)
173 mm
(6 13/16”)
679 mm
(26 3/4”)
2138 mm
(84 3/16”)
227 mm
(8 15/16”)
25 mm
(1”)
830 mm
(32 11/16”)
1643 mm
(64 11/16”)
151 mm
(5 15/16”)
22 mm (7/8”) DIA. HOLE
(UNIT CONTROL WIRE)
51 mm (2”) DIA. HOLE
(UNIT POWER WIRE)
DOWNFLOW CONDENSATE
DRAIN CONN 25 mm (1”) NPT
(SEE NOTE)
68 mm
(2 11/16”)

Unit Dimensions
RT-SVX26J-EN 15
Note: ½ NPT Gas Connection
Note: ½ NPT Gas Connection
Figure 6. Unit dimensional data 12½ ton high efficiency units
Figure 7. Unit dimensional data 15–25 tons high efficiency units
3091 mm
(121 11/16”)
1372 mm
(54”)
679 mm
(26 3/4”)
2138 mm
(84 3/16”)
227 mm
(8 15/16”)
25 mm
(1”)
843 mm
(33 3/16”)
68 mm
(2 11/16”)
1643 mm
(64 11/16”)
152 mm
(6”)
GAS CONNECTION (SEE NOTE 1)
22 mm (7/8”) DIA. HOLE
(UNIT CONTROL WIRE)
76 mm (3”) DIA. HOLE
(UNIT POWER WIRE)
DOWNFLOW CONDENSATE
DRAIN CONN 25 mm (1”) NPT
3091 mm
(121 11/16”)
1629 mm
(64 1/8”)
679 mm
(26 3/4”)
2138 mm
(84 3/16”)
227 mm
(8 15/16”)
25 mm
(1”)
843 mm
(33 3/16”)
68 mm
(2 11/16”)
1643 mm
(64 11/16”)
152 mm
(6”)
GAS CONNECTION (SEE NOTE 1)
22 mm (7/8”) DIA. HOLE
(UNIT CONTROL WIRE)
76 mm (3”) DIA. HOLE
(UNIT POWER WIRE)
DOWNFLOW CONDENSATE
DRAIN CONN 25 mm (1”) NPT

Unit Dimensions
16 RT-SVX26J-EN
Figure 8. Unit dimensional data 15–25 tons standard efficiency units, 12½–25 tons high efficiency units
Figure 9. Horizontal duct dimensional data 15–25 tons standard efficiency units, 12½–25 tons high efficiency units

RT-SVX26J-EN 17
Unit Weights
Table 1. Typical unit weights and point loading data (lb)
Unit Models
Net
Weights
(25mm/
18mm)
Corner Weights (lb)
ABCD
YS*150F 1508 506 390 275 337
YH*150F 2126 676 555 406 487
YH*150F Reheat unit 2146 682 560 410 491
YS*155F 1958 628 534 387 406
YS*180F 1925 666 505 343 410
YH*180F 2129 677 556 407 488
YH*180F Reheat unit 2149 683 561 410 491
YS*175F 2007 637 547 400 421
YS*210F 2007 639 547 399 419
YH*210F 2201 700 574 420 504
YH*210F Reheat unit 2221 706 579 424 508
YS*200F 2069 659 551 402 455
YS*240F 2069 659 551 402 455
YH*240F 2203 701 575 421 504
YH*240F Reheat unit 2223 707 580 425 509
YS*250F 2054 655 555 403 442
YS*300F 2054 655 555 403 442
YH*300F 2207 702 579 422 507
Table 2. Typical unit weights and point loading data
(kg)
Unit Models
Net
Weights
(25mm/
18mm)
Corner Weights (kg)
ABCD
YS*150F 684 230 177 125 153
YH*150F 964 307 252 184 221
YH*150F Reheat unit 973 309 254 186 223
YS*155F 877 282 242 175 177
YS*180F 873 302 229 156 186
YH*180F 966 307 252 185 221
YH*180F Reheat unit 975 310 254 186 223
YS*175F 899 286 248 181 184
YS*210F 910 290 248 181 190
YH*210F 998 318 260 190 229
YH*210F Reheat unit 1007 320 263 192 230
YS*200F 924 295 250 182 197
YS*240F 938 299 250 182 206
YH*240F 999 318 261 191 229
YH*240F Reheat unit 1008 321 263 193 231
YS*250F 917 293 251 182 191
YS*300F 932 297 252 183 200
YH*300F 1001 318 263 191 230
Figure 10. Corner weights

Unit Weights
18 RT-SVX26J-EN
Rigging
Refer to Figure 11, p. 18 and Table 1, p. 17 and Table 2,
p. 17 for typical unit operating weights rigging before
proceeding.
1. Remove the shipping crate from around the unit. Do
not remove the crating from the top of the unit.
2. Rig the unit as shown in Figure 11, p. 18. Attach
adequate strength lifting slings to all four lifting
bracketsintheunitbaserail.Donotusecables,chains,
or slings except as shown.
3. Install a lifting bar, as shown in Figure 11, p. 18, to
protect the unit and to facilitate a uniform lift. The
minimum distance between the lifting hook and the
top of the unit should be 7 feet.
4. Test-lift the unit to ensure it is properly rigged and
balanced, make any necessary rigging adjustments.
5. Lift the unit and position it into place.
6. Downflow units; align the base rail of the unit with the
curb rail while lowering the unit onto the curb. Make
sure that the gasket on the curb is not damaged while
positioning the unit.
WARNING
Heavy Objects!
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift. Other lifting arrangements could cause
equipment or property damage. Failure to follow
instructions above or properly lift unit could result in
unit dropping and possibly crushing operator/
technician which could result in death or serious injury.
WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper
center of gravity lift point. To avoid dropping of unit,
reposition lifting point if unit is not level. Failure to
properly lift unit could result in unit dropping and
possibly crushing operator/technician which could
result in death or serious injury and possible equipment
or property-only damage.
Figure 11. Rigging and center of gravity data

RT-SVX26J-EN 19
Installation
Foundation
Horizontal Units
Notes:
•For units with optional Condensate Overflow Switch
(COF), the switch will not work properly if unit is not
level or slightly sloped toward switch.
•Toassurepropercondensateflowduringoperationthe
unit and the curb must be level.
If the unit is installed at ground level, elevate it above the
snow line. Provide concrete footings at each support
locationwitha“fullperimeter”supportstructureoraslab
foundationforsupport.Referto Table 1,p. 17and Table 2,
p. 17 for the unit’s operating and point loading weights
when constructing a footing foundation.
If anchoring is required, anchor the unit to the slab using
hold down bolts or isolators. Isolators should be installed
to minimize the transmission of vibrations into the
building.
For rooftop applications, if anchoring is required, anchor
the unit to the roof with hold-down bolts or isolators.
Check with a roofing contractor for proper waterproofing
procedures.
Ductwork
Elbows with turning vanes or splitters are recommended
tominimizeairnoiseduetoturbulenceandtoreducestatic
pressure.
When attaching the ductwork to the unit, provide a water-
tight flexible connector at the unit to prevent operating
sounds from transmitting through the ductwork.
All outdoor ductwork between the unit and the structure
should be weather proofed after installation is completed.
Note: For sound consideration, cut only the holes in the
roofdeck for theductworkpenetrations.Donot cut
out the entire roof deck within the curb perimeter.
If a Curb Accessory Kit is not used:
a. The ductwork can be attached directly to the
factory-provided flanges around the unit’s supply
andreturnairopenings.Besuretouseflexibleduct
connections at the unit.
b. For “built-up” curbs supplied by others, gaskets
must be installed aroundthe curb perimeter flange
and the supply and return air opening flanges.
General Unit Requirements
The checklist listed below is a summary of the steps
required to successfully install a commercial unit. This
checklist is intended to acquaint the installing personnel
withwhatisrequiredintheinstallationprocess.Itdoesnot
replace the detailed instructions called out in the
applicable sections of this manual.
• Check the unit for shipping damage and material
shortage; file a freight claim and notify appropriate
sales representative.
• Verify correct model, options and voltage from
nameplate.
• Verify that the installation location of the unit will
provide the required clearance for proper operation.
• Assembleandinstalltheroofcurb(ifapplicable).Refer
to the latest edition of the curb installers guide that
ships with each curb kit.
• Fabricate and install ductwork; secure ductwork to
curb.
• Rigging the unit.
• Set the unit onto the curb; check for levelness.
• Ensureunit-to-curbsealistightandwithoutbucklesor
cracks.
• Install and connect a condensate drain line to the
evaporator drain connection.
WARNING
Risk of Roof Collapsing!
Confirm with a structural engineer that the roof
structure is strong enough to support the combined
weight of the roofcurb and the unit. Refer to “Unit
Weights,” p. 17 for typical unit and curb weights. Failure
to ensure proper structural roof support could cause the
roof to collapse, which could result in death or serious
injury and property damage.
NOTICE:
Water Damage!
Non-factory penetrations through the base of this unit
are not allowed. Any penetration in the base of the unit
may affect the water tight integrity of the unit and lead
to water leaks into the conditioned space. Failure to
follow instructions could result in equipment and
property damage.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.

Installation
20 RT-SVX26J-EN
Factory Installed Economizer
• Ensure the economizer has been pulled out into the
operating position. Refer to the economizer installers
guide for proper position and setup.
• Install all access panels.
Main Electrical Power Requirements
• Verify that the power supply complies with the unit
nameplate specifications.
• Inspect all control panel components; tighten any
loose connections.
• Connect properly sized and protected power supply
wiring to a field-supplied/ installed disconnect switch
andtothemainpowerterminalblock(HTB1)intheunit
control panel.
• Install proper grounding wires to an earth ground.
Note: All field-installed wiring must comply with NEC
and applicable local codes.
Electric Heat Requirements
• Verify that thepower supply complies with theelectric
heaterspecificationsontheunitandheaternameplate.
• Inspect the heater junction box and control panel;
tighten any loose connections.
• Check electric heat circuits for continuity.
• Low Voltage Wiring (AC and DC) Requirements
• Install the zone thermostat, with or without switching
subbase.
• Connect properly sized control wiring to the proper
termination points between the zone thermostat and
the unit control panel.
Condensate Drain Configuration
An evaporator condensate drain connection is provided
on each unit. Refer to “Unit Dimensions,” p. 12 for the
appropriate drain location.
A condensate trap must be installed at the unit due to the
drainconnectionbeingonthe“negative pressure”sideof
thefan.InstalltheP-Trapusingthe guidelinesinFigure 12.
A condensate drain line must be connected to the P-Trap.
Pitch the drain lines at least ½-inch for every 10 feet of
horizontal run to assure proper condensate flow. Do not
allow the horizontal run to sag causing a possible double-
trap condition which could result in condensate backup
due to “air lock”.
Filter Installation
Eachunitshipswith2-inch filtersinstalled.Thequantityof
filters is determined by unit size. Access to the filters is
obtained by removing the indoor fan access panel. If
included, pull on filter removal tool to remove filters.
Refer to the unit Service Facts (shipped with each unit) for
filter requirements.
Note: Do not operate the unit without filters.
Field Installed Power Wiring
An overall dimensional layout for the standard field
installedwiringentranceintotheunitisillustratedin“Unit
Dimensions,” p. 12. To insure that the unit’s supply power
wiringisproperlysizedandinstalled,followtheguidelines
outlined below.
Note: All field installed wiring must conform to NEC
guidelines as well as state and Local codes.
Verify that the power supply available is compatible with
the unit’s nameplate ratings. The available supply power
mustbewithin10 percentoftheratedvoltagestampedon
thenameplate.Useonlycopperconductorstoconnectthe
power supply to the unit.
Note: If the unit is not equipped with an optional factory
installed nonfused disconnect switch or circuit
breaker,afield supplieddisconnectswitchmustbe
installed at or near the unit in accordance with the
National Electrical Code (NEC latest edition).
Figure 12. Condensate trap installation
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of
conductors. Failure to use copper conductors could
result in equipment damage.