Trane YHC092E Installation and operating instructions

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
Precedent™ — Gas/Electric
3 – 10 Tons – 60 Hz
July 2012 RT-SVX21K-EN
Installation, Operation,
and Maintenance
Model Numbers YSC036E - YSC060E YHC036E - YHC067E
YSC072F - YSC120F YHC092E - YHC120E
YHC048F - YHC060F YHC072F - YHC092F

© 2012 Trane All rights reserved RT-SVX21K-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 death or personal injury. Cautions are designed to alert
personnel to hazardous situations that could result in
personal injury, while notices indicate a situation that
could 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.
Readthismanualthoroughlybeforeoperatingorservicing
this unit.
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.
Revision Summary
RT-SVX21K-EN (18 July 2012)
• MERV 8 filter with filter removal tool
• Stainless steel drain pan, condensate overflow switch
• Updated Model Number Description, Maintenance,
Troubleshooting
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
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.
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.
ALWAYSrefertoappropriateMSDSsheetsandOSHA
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 recommendations could result in death
or serious injury.

RT-SVX21K-EN 3
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . 3
Model Number Description . . . . . . . . . . . . . . . 5
Model Number Notes . . . . . . . . . . . . . . . . 6
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Nameplate . . . . . . . . . . . . . . . . . . . . . 7
Compressor Nameplate . . . . . . . . . . . . . . . 7
Microchannel Condenser Barcode ID . . . . 7
Unit Description . . . . . . . . . . . . . . . . . . . . . 7
Economizer Control Actuator (Optional) . 7
System Input Devices & Functions . . . . . . 8
Low Pressure Control . . . . . . . . . . . . . . . . . 9
High Pressure Control . . . . . . . . . . . . . . . . 9
Power Exhaust Control (Optional) . . . . . . 9
Lead/Lag Control (Dual Circuit Only) . . . . 9
Evaporator Frost Control . . . . . . . . . . . . . 10
Smoke Detector Sensor (Optional) . . . . . 11
Phase Monitor . . . . . . . . . . . . . . . . . . . . . 11
Single Zone Variable Air Volume / Displace-
ment Ventilation (Optional) . . . . . . . . . . . 11
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . 19
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Horizontal Units . . . . . . . . . . . . . . . . . . . . 21
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Downflow . . . . . . . . . . . . . . . . . . . . . . . . . 23
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
General Unit Requirements . . . . . . . . . . . . 24
Factory Installed Economizer . . . . . . . . . 24
Temperature Limit Switch Usage for Gas
Heat Units . . . . . . . . . . . . . . . . . . . . . . . . . 25
HorizontalDischargeConversion(3Through5
Ton Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TCO-1 Instructions . . . . . . . . . . . . . . . . . . . . 26
Horizontal Discharge Conversion (6 Through
10 Ton Units) . . . . . . . . . . . . . . . . . . . . . . . . 27
TCO1 Instructions . . . . . . . . . . . . . . . . . . . . 28
Return Air Smoke Detector . . . . . . . . . . . . .28
Main Electrical Power Requirements . . . . .29
Through the Base Gas Installation . . . . . . .29
Requirements for Gas Heat . . . . . . . . . . . . .30
Condensate Drain Configuration . . . . . . . . .30
Filter Installation . . . . . . . . . . . . . . . . . . . . . .31
Field Installed Power Wiring . . . . . . . . . . . .31
Main Unit Power . . . . . . . . . . . . . . . . . . . . . .31
Standard Wiring . . . . . . . . . . . . . . . . . . . . .32
Optional TBUE Wiring (Through the Base
Electrical Option) . . . . . . . . . . . . . . . . . . . .32
Field Installed Control Wiring . . . . . . . . . .32
Control Power Transformer . . . . . . . . . . .33
Controls Using 24 VAC . . . . . . . . . . . . . . .33
Controls using DC Analog Input/Outputs
(Standard Low Voltage Multi
conductor Wire) . . . . . . . . . . . . . . . . . . . . .33
DC Conductors . . . . . . . . . . . . . . . . . . . . . .33
Smoke Detector Customer Low Voltage Wir-
ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Space Temperature Averaging (ReliaTel™ On-
ly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Voltage Imbalance . . . . . . . . . . . . . . . . . . . . .42
Electrical Phasing (Three Phase Motors) . .42
Compressor Crankcase Heaters (Optional) 43
ReliaTel™ Controls . . . . . . . . . . . . . . . . . .43
Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .44
ReliaTel Controls . . . . . . . . . . . . . . . . . . . .44
Electromechanical Controls Test
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .44
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Verifying Proper Air Flow . . . . . . . . . . . . . . .46
Units with 5-Tap Direct Drive Indoor Fan .46
Units with Belt Drive Indoor Fan . . . . . . . .46
Units with Direct Drive Indoor Fan - Electro-
mechanical Control . . . . . . . . . . . . . . . . . .47
ReliaTel Units with Direct Drive Indoor Fan
(7.5 - 8½ Ton High Efficiency, 10 Ton) . . .47
Units with Constant CFM Direct Drive Indoor
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Table of Contents
4RT-SVX21K-EN
Return Air Smoke Detector . . . . . . . . . . . . . 48
Economizer Start-Up . . . . . . . . . . . . . . . . 49
Compressor Start-Up . . . . . . . . . . . . . . . . . 50
Dehumidification Option . . . . . . . . . . . . . . . 50
Gas Heat Units . . . . . . . . . . . . . . . . . . . . . . . 50
Final System Setup . . . . . . . . . . . . . . . . . . . 50
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Fan Belt Adjustment - Belt Drive Units . . . 51
Monthly Maintenance . . . . . . . . . . . . . . . . . 51
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Return Air Smoke Detector Maintenance 51
Condensate Overflow Switch . . . . . . . . . 52
Cooling Season . . . . . . . . . . . . . . . . . . . . 52
Heating Season . . . . . . . . . . . . . . . . . . . . 52
Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . 52
Annual Maintenance . . . . . . . . . . . . . . . . . . 53
Final Process . . . . . . . . . . . . . . . . . . . . . . . 54
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 55
ReliaTel™ Control . . . . . . . . . . . . . . . . . . . . 55
System Status Checkout Procedure . . . . . 55
Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Resetting Cooling and Ignition Lockouts . 56
Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Zone Temperature Sensor (ZTS) Service Indi-
cator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Clogged Filter Switch . . . . . . . . . . . . . . . . . 57
Fan Failure Switch . . . . . . . . . . . . . . . . . . . . 57
Condensate Overflow Switch . . . . . . . . . . . 57
Zone Temperature Sensor (ZTS) Tests . . 57
Test 1 - Zone Temperature Thermistor
(ZTEMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Test 2 - Cooling Set Point (CSP) and Heating
Set Point (HSP) . . . . . . . . . . . . . . . . . . . . . 57
Test 3 - System Mode and Fan Selection 57
Test 4 - LED Indicator Test, (SYS ON, HEAT,
COOL & SERVICE) . . . . . . . . . . . . . . . . . . 57
Relative Humidity Sensor Test . . . . . . . . 58
Programmable & Digital Zone Sensor
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
ReliaTel Refrigeration Module (RTRM) De-
fault Chart . . . . . . . . . . . . . . . . . . . . . . . . . .58
Unit Operation without a Zone Sensor . .58
Unit Economizer Control (ECA) Troubleshoot-
ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
ReliaTel Control . . . . . . . . . . . . . . . . . . . . .58
Electromechanical Control . . . . . . . . . . . .59
Heating Failure . . . . . . . . . . . . . . . . . . . . . .59
Cooling Failure . . . . . . . . . . . . . . . . . . . . . .59
Resetting Cooling and Ignition Lockouts . .59
Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Unit Economizer Control (ECA) Test Proce-
dures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Electromechanical Control . . . . . . . . . . . .59
Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Troubleshooting procedures for Direct Drive
Plenum Fan . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Unit Wiring Diagrams Numbers . . . . . . . . . . .61
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . .63
Combination Gas Electric Air Conditioner .63
YCC, YCD, YCH, YCP, YSC and YHC (Parts On-
ly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Models Less Than 20 Tons for Residential
Use* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Combination Gas Electric Air Conditioner .63
YCZ, YCY, YCX, YCC, YCD, YCH, YCP, YHC
and YSC (Parts Only) . . . . . . . . . . . . . . . . .63
Models Less Than 20 Tons for Commercial
Use* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

RT-SVX21K-EN 5
Model Number Description
Digit 1 - Unit Type
Y DX Cooling, Gas Heat
Digit 2 - Efficiency
S Standard Efficiency
HHighEfficiency
Digit 3 - Airflow
C Convertible
Digit 4,5,6 - Nominal Gross
Cooling Capacity (MBh)
036 3 Ton
048 4 Ton
060 5 Ton
072 6 Ton
090 7½ Ton, Single Compressor
092 7½ Ton, Dual Compressor
102 8½ Ton
120 10 Ton
Digit 7 - Major Design Sequence
E R-410A Refrigerant
F Microchannel Type Condenser
Coils24
Digit 8 - Voltage Selection
1 208/230/60/1
3 208-230/60/3
4 460/60/3
W 575/60/3
Digit 9 - Unit Controls
E Electromechanical
R ReliaTel™ Microprocessor
Digit 10 - Heating Capacity
L Low Heat
M Medium Heat
H High Heat
X Low Heat, Stainless Steel Heat
Exchanger
Y Medium Heat, Stainless Steel Heat
Exchanger
Z High Heat, Stainless Steel Heat
Exchanger
Digit 11 - Minor Design
Sequence
A First Sequence21
B Second Sequence20
Digit 12,13 - Service Sequence
** Factory Assigned
Digit 14 - Fresh Air Selection
0NoFreshAir
A Manual Outside Air Damper 0-50%4
B Motorized Outside Air Damper
0-50%28
C Economizer, Dry Bulb 0-100%
without Barometric Relief7
D Economizer, Dry Bulb 0-100%
with Barometric Relief7
E Economizer, Reference Enthalpy
0-100% without Barometric Relief3,7
F Economizer, Reference Enthalpy
0-100% with Barometric Relief3,7
G Economizer, Comparative
Enthalpy 0-100% without
Barometric Relief3,7
H Economizer, Comparative
Enthalpy 0-100% with Barometric
Relief3,7
Digit 15 - Supply Fan/Drive Type/
Motor
0 Standard Drive6
1 Oversized Motor
2 Optional Belt Drive Motor18
6 Single Zone VAV26
7 Multi-Speed Indoor Fan27
Digit 16 - Hinged Service
Access/Filters
0 Standard Panels/Standard Filters
A Hinged Access Panels/Standard
Filters
B Standard Panels/2” MERV 8 Filters
C Hinged Access Panels/2” MERV 8
Filters
D Standard Panels/2” MERV 13 Filters
E Hinged Access Panels/2” MERV 13
Filters
Digit 17 - Condenser Coil
Protection
0 Standard Coil
1 Standard Coil with Hail Guard
2 Black Epoxy Pre-Coated Condenser
Coil25
3 Black Epoxy Pre-Coated
Condenser Coil with Hail Guard25
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 Electric8
B Through-the-Base Gas Piping16
C Through-the-Base Electric and Gas
Piping16
Digit 19 - Disconnect/Circuit
Breaker (three-phase only)
0 No Disconnect/No Circuit Breaker
1 Unit Mounted Non-Fused
Disconnect8
2 Unit Mounted Circuit Breaker8
Digit 20 - Convenience Outlet
0 No Convenience Outlet
A Unpowered Convenience Outlet
B Powered Convenience Outlet
(three-phase only)9
Digit 21 - Communications
Options3
0 No Communications Interface
1 Trane Communications Interface
2 LonTalk® Communications Interface
3 Novar 2024 Controls30
4 Novar 3051 Controls without Zone
Sensor30
5 Novar 3051Controls Interface with
DCV30
6 BACnet™ Communications Interface
Digit 22 - Refrigeration System
Option
0 Standard Refrigeration System10
B Dehumidification Option22,23
Digit 23 - Refrigeration Controls
Note: Applicable to Digit 7 = E, F
0 No Refrigeration Control5
1Frostat
11,29
2 Crankcase Heater2
3Frostat
11,29 and Crankcase Heater2
Digit 24 - Smoke Detector17
0 No Smoke Detector
A Return Air Smoke Detector12,13
B Supply Air Smoke Detector
C Supply and Return Air Smoke
Detectors12,13
D Plenum Smoke Detector
Digit 25 - System Monitoring
Controls
0 No Monitoring Control14
1 Clogged Filter Switch14
2 Fan Failure Switch14
3 Discharge Air Sensing Tube14
4 Clogged Filter Switch and Fan
Failure Switch14
5 Clogged Filter Switch and Discharge
Air Sensing Tube14
6 Fan Failure Switch and Discharge Air
Sensing Tube14
7 Clogged Filter Switch, Fan Failure
Switch and Discharge Air
Sensing Tube14
8 Novar Return Air Sensor
(NOVAR 2024)15,30
9 Novar Zone Temp Sensor
(NOVAR 3051)19,30
A Condensate Drain Pan Overflow
Switch
B Clogged Filter Switch14 and
Condensate Drain Pan Overflow
Switch
C Fan Failure Switch14 and Condensate
Drain Pan Overflow Switch
D Discharge Air Sensing14 and
Condensate Drain Pan Overflow
YSC 036 E 3 R Z B **
123 456 7 8 9 10 11 1213

Model Number Description
6RT-SVX21K-EN
Switch
E Clogged Filter Switch14, Fan Failure
Switch14 and Condensate Drain Pan
Overflow Switch
F Clogged Filter Switch14, Discharge
Air Sensing Tube14 and Condensate
Drain Pan Overflow Switch
G Fan Failure Switch, Discharge Air
Sensing Tube14 and Condensate
Drain Pan Overflow Switch
H Clogged Filter Switch14, Fan Failure
Switch14, Discharge Air Sensing14
and Condensate Drain Pan Overflow
Switch
Digit 26 - System Monitoring
Controls
0 No Monitoring Controls
A Demand Control Ventilation
(CO2)31,32
Digit 27 - Unit Hardware
Enhancements
0 No Enhancements
1 Stainless Steel Drain Pan
Model Number Notes
1. Available on 3-5 ton models.
2. Standard on 4-5 Ton E3,4,W and
6-10 TonHeatPumpsandall High
Efficiency models.
3. Not available with
electromechanical controls.
4. Manual outside air damper will
ship factory supplied within the
unit, but must be field installed.
5. Highpressurecontrolisstandard
on all units.
6. On 3-5 ton, multispeed direct
drive is standard on single phase
and 15 SEER. On 6-10 ton,
multispeed direct drive is
standard on all 10 ton and 7.5-8.5
ton high efficiency. Belt drive is
standard on all other units.
7. Economizer with Barometric
Reliefis fordownflowconfigured
units only. Order Economizer
without Barometric Relief for
horizontal configuration.
Barometric Relief for horizontal
configuredunitsmustbeordered
as field installed accessory.
8. Through the base electric
required when ordering
disconnect/circuit breaker
options.
9. Requires use of Disconnect or
Circuit Breaker.
10. Standard metering devices are
TXVs.
11. Frostatcannotbefieldinstalledin
electro-mechanical units.
12. The return air smoke detector
maynotfituporworkproperlyon
thePrecedentunits 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.
13. Return Air Smoke Detector
cannot be ordered with Novar
Controls.
14. Theseoptionsarestandardwhen
ordering Novar Controls.
15. This option is used when
ordering Novar Controls.
16. Includes gas piping and shutoff
(field assembly required).
17. Not available with high
temperature duct sensor
accessory.
18. Digit 15 = 2
19. Novar Sensor utilized with
Digit21=(4)Novar3051Controls
without Zone Sensor.
20. Available for 10 ton standard
efficiency models only.
21. Available for 3, 4, 5, 6, 7½, 8½ ton
standard/high efficiency models
only.
22. Requires selection of 2” Pleated
Filters (option B or C) for Digit 16.
23. Not available on 6 ton units and
all single phase or standard
efficiency.
24. Standard on YSC 6, 7½ (single
and dual systems), 8½, 10 ton
standard efficiency models and
YHC4,5,6,7½tonhighefficiency
models (except for
dehumidification models).
25. Epoxy coil and epoxy with
hailguard options are not
available for units with
microchannel condenser coil.
26. SingleZoneVAVisonlyavailable
on 7.5-10 ton high efficiency and
10 ton standard efficiency
productswithReliaTel™controls.
27. Multi-speed indoor fan available
only on 7.5 & 8.5 ton high
efficiency, and 10 ton products
with ReliaTel™ controls.
28. Motorized Outside Air Damper is
not available on Multi-Speed or
SZVAV (Single Zone Variable Air
Volume) products.
29. Frostat standard on Multi-Speed
andSZVAV (SingleZoneVariable
Air Volume) products.
30. NovarisnotavailablewithSZVAV
products.
31. Demand Control Ventilation not
available with electromechanical
controls.
32. Demand Control Ventilation
Option includes wiring only. The
C02sensorisafield-installedonly
option.
Digit 15 = 0
Standard Efficiency
1 Phase = High Efficiency Multispeed Direct
Drive Motor
3 Phase (3-8½ Ton) = Belt Drive
3 Phase (10 Ton) = Ultra High Efficiency Direct
Drive Plenum Fan
High Efficiency
1 Phase = High Efficiency Multispeed Direct
Drive Motor
3Phase(3-5 ton) = HighEfficiencyMultispeed
Direct Drive Motor
3 Phase (3-5 ton w/Dehumidification) = Belt
Drive Motor
3 Phase (7½-10 ton) = Ultra High Efficiency
Direct Drive Plenum Fan
Not Available
Standard Efficiency
10 Ton w/575V
High Efficiency
3-5 ton w/Standard Indoor Motor w/460V
Standard Efficiency
1 Phase = Not Available
3 Phase = Not Available
High Efficiency
1 Phase = Not Available
3 Phase (3-5 ton) = May be Ordered
3 Phase (3-5 ton w/Dehumidification) = Not
Available
3 Phase (6-10 ton) = Not Available

RT-SVX21K-EN 7
General Information
Unit Inspection
As soon as the unit arrives at the job site
• Verifythat thenameplate datamatchesthe dataon the
salesorderandbill oflading(includingelectrical data).
• 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.
If the job site inspection of the unit reveals damage or
material shortages, file a claim with the carrier
immediately.Specifythetypeandextentofthedamageon
the “bill of lading” before signing.
• 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 must
provide reasonable evidence that the damage did not
occur after delivery.
• Notify the appropriate sales representative before
installing or repairing a damaged unit.
Storage
Take precautions to prevent condensate from forming
inside the unit’s electrical compartments and motors if:
1. the unit is stored before it is installed; or,
2. 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,
Supply Air and Return Air 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 ““Unit Start-Up,” p. 46”.
The manufacturer will not assume any responsibility for
equipment damage resulting from condensate
accumulation on the unit’s electrical and/or mechanical
components.
Unit Nameplate
A Mylar unit nameplate is located on the unit’s corner
support next to the filter access panel. It includes the unit
model number, serial number, electrical characteristics,
refrigerant charge, as well as other pertinent unit data.
Compressor Nameplate
Thenameplateforthecompressorsarelocatedontheside
of the compressor.
Microchannel Condenser Barcode ID
Barcode decal used for condenser coil part identification
canbe locatedon the verticalheader and topof coil's inlet/
outlet side.
Unit Description
Before shipment, each unit is leak tested, dehydrated,
charged with refrigerant and compressor oil, and run
tested for proper control operation.
Thecondensercoilsareeitheraluminumfin,mechanically
bonded to copper tubing or all aluminum microchannel.
Direct-drive, vertical discharge condenser fans are
provided with built-in thermal overload protection.
Therearetwo control systems offeredfor theseunits. The
electromechanical control option uses a thermostat to
performunitfunctions.TheReliaTel™ ControlModuleisa
microelectronic control 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.
These modules through Proportional/Integral control
algorithms perform specific unit functions that governs
unitoperationinresponseto;zonetemperature,supplyair
temperature, and/or humidity conditions depending on
the application. The stages of capacity control for these
units are 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 (Optional)
Electromechanical Control
TheECAmonitorsthemixedairtemperature,ambientdry
bulb temperature and local minimum position setpoint
sensors, if selected, to control dampers to an accuracy of
+/- 5% of stroke. The actuator is spring returned to the
closed position any time that power is lost to the unit. Itis
capable of delivering up to 25 inch pounds of torque and
is powered by 24 VAC.
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)

General Information
8RT-SVX21K-EN
sensors, if selected, to control dampers to an accuracy of
+/- 5% of stroke. The actuator is spring returned to the
closed position any time that power is lost tothe unit. It is
capable of delivering up to 25 inch pounds of torque and
is powered by 24 VAC.
RTCI - ReliaTel™ Trane Communication
Interface (Optional)
This module is used when the application calls for an
ICSTM 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 a kit to be field installed. Follow the
installation instruction that ships with each kit when field
installation is necessary.
RLCI - ReliaTel™ LonTalk Communication
Interface (Optional)
This module is used when the application calls for an
ICSTM building management type control system that is
LonTalk.Itallowsthecontrolandmonitoringofthesystem
throughanICSpanel.Themodulecanbeorderedfromthe
factory or ordered as a kit to be field installed. Follow the
installation instruction that ships with each kit when field
installation is necessary.
RBCI - ReliaTel™ BACnet 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.
Follow the installationinstructionsthat ships witheach kit
when field installation is necessary.
RTOM - ReliaTel™ Options Module (Standard
on 17 Plus, 7.5 Ton & 8.5 Ton High Efficiency
with ReliaTel, 10 Ton with ReliaTel)
TheRTOMmonitorsthesupply fanproving,cloggedfilter,
supply air temperature, exhaust fan setpoint, supply air
tempering,Frostat™,smoke detector,and Variable Speed
Fan Control (17 Plus units only). Refer to system input
devices and functions for operation.
System Input Devices & Functions
TheRTRMmusthave a zonesensororthermostat inputin
order to operate the unit. The flexibility of having several
modecapabilitiesdependsuponthetypeofzonesensoror
thermostat selected to interface with the RTRM.
Thedescriptions ofthefollowingbasicInputDevices used
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 can be connected to sense indoor
fan operation:
FFS (Fan Failure Switch) If air flow through the unit is not
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,
andtheSERVICE outputwillflash.The system willremain
locked out until a reset is initiated either manually or
through ICS.
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. The clogged filter output is
energized when the supply fan is operating and the
cloggedfilterswitchhasbeenclosedforatleast2minutes.
The system will continue to operate regardless of the
status of the filter switch.
Note: 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.
Condensate Drain Pan Overflow Switch
(Optional)
ReliaTel Option
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 functions 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 unit shutdown
more than 2 times in a 3 days period, the unit will be
locked-out of operation requiring manual reset of
diagnostic system through Zone Sensor or Building
Automation System (BAS). Cycling unit power will also
clear the fault.
Electromechanical Option
This input incorporates the condensate overflow switch
(COF), COF Relay, COF Time Delay. When the condensate
level reaches the trip point, the COF relay energizes and
opens the 24VAC control circuit which disables the unit.
Oncethe24VACcontrolcircuitisopened,adelaytimerwill
prevent unit start-up for three minutes.

General Information
RT-SVX21K-EN 9
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
threeminutesofoperation,thecompressorforthatcircuit
will be locked out, a diagnostic communicated to the
remote panel (if installed), and a manual reset will be
required to restart the compressor.
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.
Iffourconsecutiveopenconditionsoccurduringanactive
call for cooling, the compressor will be locked out, a
diagnostic communicated to ICS™, if applicable, and a
manual reset required to restart the compressor. On dual
compressor units only the affected compressor circuit is
locked out.
Electromechanical Control
WhentheLPC isopened, thecompressorforthat circuitis
turned off immediately. The compressor will restart when
the LPC closes.
High Pressure Control
ReliaTel Control
Thehighpressurecontrolsarewiredinseriesbetweenthe
compressor outputs on the RTRM and the compressor
contactor coils. If the high pressure control switch opens,
theRTRMsenses alack ofcurrent while calling forcooling
and locks the compressor out.
Iffourconsecutiveopenconditionsoccurduringanactive
call for cooling, the compressor will be locked out, a
diagnostic communicated to ICS™, if applicable, and a
manual reset required to restart the compressor. On dual
compressor units only the affected compressor circuit is
locked out.
Electromechanical Control
WhentheHPCisopened,thecompressorfor thatcircuitis
turned off immediately. The compressor will restart when
the HPC closes.
Power Exhaust Control (Optional)
ReliaTel Control
Thepowerexhaust fanis startedwhenever thepositionof
the economizer dampers meets or exceed the power
exhaust setpoint when the indoor fan is on.
With the optional ventilation override accessory, the
power exhaust fan is independent of the indoor fan.
The setpoint panel is located in the return air section and
is factory set at 25%.
Electromechanical Control
The power exhaust fan is started whenever the indoor fan
isonandtheadjustabledamperlimitswitchDLSisclosed.
Lead/Lag Control (Dual Circuit Only)
ReliaTel Control 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. Lead/
Lag is not available on Multi-Speed Indoor Fan, or Single
Zone Variable Air Volume (SZVAV) products.
Zone Sensor Module (ZSM) (BAYSENS106*)
This electronic sensor features three system switch
settings (Heat, Cool, and Off) and two fan settings (On
and 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 BAYSENS077*.
Zone Sensor (BAYSENS110*)
Thiselectronicsensorfeaturesfoursystemswitchsettings
(Heat, Cool, Auto, and Off) and two fan settings (On and
Auto) with four system status LED’s. It is a manual or auto
changeover control with dual setpoint capability. It can be
used with a remote zone temperature sensor
BAYSENS077*.
Wall Mounted Relative Humidity Sensor
(BAYSENS036*)
Field installed, wall mounted humidity sensor is used to
control activation of Enhanced Dehumidification and the
Hot Gas Reheat Dehumidification options. Humidity set
pointscanbeselectedforrelativehumiditylevelsbetween

General Information
10 RT-SVX21K-EN
40% and 60% by adjusting the DEHUMID setting on the
ReliaTel Options Module. See Figure 42, p. 34.
Duct Mounted Relative Humidity Sensor
(BAYSENS037*)
Field installed, duct mounted humidity sensor is used to
control activation of Enhanced Dehumidification and the
hot gas reheat dehumidification options. Humidity set
pointscanbeselectedforrelativehumiditylevelsbetween
40% and 60% by adjusting the DEHUMID setting on the
ReliaTel Options Module. See Figure 42, p. 34.
Programmable Zone Sensor - (BAYSENS119*)
This7dayprogrammablesensorfeatures 2,3or4periods
for Occupied or Unoccupied programming per day. If the
power is interrupted, the program is retained in
permanentmemory.If poweris offforanextendedperiod
of time, only the clock and day may have to be reset.
The Zone Sensor allows selection of 2, 3 or 4 system
modes(Heat,Cool,Auto,and Off),twofanmodes(Onand
Auto). It has dual temperature selection with
programmable start time capability.
The occupied cooling set point ranges between 45 and 98
º F. The heating set point ranges between 43 and 96ºF.
A liquid crystal display (LCD) displays zone temperature,
temperature set points, day of the week, time, and
operational mode symbols.
The Option Menu is used to enable or disable applicable
functions, i.e.; Morning Warm-up, Economizer minimum
position overrideduringunoccupied status, Fahrenheitor
Centigrade, Supply air tempering, Remote zone
temperature sensor, 12/24 hour time display, Smart fan,
and Computed recovery.
Duringanoccupiedperiod,anauxiliaryrelayratedfor1.25
amps @ 30 volts AC with one set of single pole double
throw contacts is activated.
Status Inputs (4 Wires Optional)
The ZSM can be wired to receive four (4) operating status
signals from the RTRM (HEAT, COOL, SYSTEM “ON”,
SERVICE).
Four (4) wires from the RTRM should be connected to the
appropriate terminals (7, 8, 9 & 10) on the ZSM.
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, 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 (BAYSENS077*)
This electronic sensor can be used with BAYSENS106*,
108*, 110*, 119*RemotePanels. Whenthis sensoriswired
to a BAYSENS119* Remote Panel, wiring must be 18 AWG
ShieldedTwistedPair(Belden8760orequivalent).Referto
the specific Remote Panel for wiring details.
Wireless Zone Sensor (BAYSENS050)
Thiselectronicsensor featuresfive systemsettings(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.
Electromechanical Control
The unit must have a thermostat to operate.
•BAYSTAT151
•Single Stage - 1 Heat/1 Cool
•BAYSTAT155
•Multi Stage - 3 Heat/2 Cool - Can be Used for
Economizer Operation
• BAYSENS150
•Multi stage - 3 Heat/2 Cool Programmable
Thermostat
High Temperature Sensor (BAYFRST001*)
This sensor connects to the RTRM Emergency Stop Input
ontheLTBandprovideshighlimit“shutdown”oftheunit.
The sensor is used to detect high temperatures due to a
high thermal event in the air conditioning or ventilation
ducts. The sensor is designed to mount directly to the
sheetmetalduct.Eachkitcontainstwosensors.Thereturn
air duct sensor (X1310004001) is set to open at 135ºF. The
supply air duct sensor (X1310004002) is set to open at
240ºF. The control can be reset after the temperature has
been lowered approximately 25ºF below the cutout
setpoint.
Evaporator Frost Control
ReliaTel™ Option
This input incorporates the Frostat™ control (FOS)
mounted in the indoor coil circuit and can be activated by

General Information
RT-SVX21K-EN 11
closing a field supplied contact installed in parallel with
the FOS.
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
FOS close.
Frostat is standard on multi-speed indoor motors and
single zone VAV products (SZVAV).
Electromechanical Option
This input incorporates the Frostat™ control (FOS)
mounted in the indoor coil circuit and can be activated by
openingafieldsuppliedcontactinstalledinserieswiththe
FOS.
If this circuit is open before the compressor is started, the
compressor will not be allowed to operate. Anytime this
circuit is opened during compressor operation, the
compressorforthatcircuitisimmediatelyturned“Off”.The
compressor will restart when the FOS closes.
Discharge Line Temp Switch (DLTS)
TheDLTSisloopedinserieswithHPCandLPC.It prevents
compressor from overheating (over 300 Fº dome temp) in
case of indoor fan failure (cooling) or outdoor fan failure
(heating).
Smoke Detector Sensor (Optional)
Thissensorprovideshighlimit“shutdown”oftheunitand
requires a manual reset. The sensor is used to detect
smoke in the air conditioning or ventilation ducts.
Notes:
•Thesupply air smoke detector samplessupplyair.The
return and plenum air smoke detectors sample return
air. The smoke detectors are designed to shut off the
unit if smoke is sensed. This function is performed by
sampling the airflow entering the unit at the return air
opening. Follow the instructions provided below to
assurethat theairflowthroughthe unit issufficient for
adequatesampling.Failuretofollowtheseinstructions
will prevent the smoke detectors from performing its
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 velocity that falls within these limits
over the entire airflow range specified in the evaporator
fan performance tables.
Phase Monitor
Thissensormonitorsvoltagebetweenthe3conductorsof
the 3 phase power supply. Two LED lights are provided:
• The green light indicates that a balanced 3 phase
supply circuit is properly connected.
• The red light indicates that unit operation has been
prevented. There are two conditions that will prevent
unit operation:
•The power supply circuit is not balanced with the
proper phase sequence of L1, L2, L3 for the 3
conductors of a 3 phase circuit.
•Thelinetolinevoltageisnotbetween180voltsand
633 volts.
Single Zone Variable Air Volume /
Displacement Ventilation (Optional)
This sensor offers full supply fan modulation across the
available airflow range. In addition to full supply fan
modulation, the unit controls the discharge air
temperature to a varying discharge air temperature
setpoint in order to maintain Space Temperature.

12 RT-SVX21K-EN
Unit Dimensions
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.
Figure 1. Typical installation clearances for single & multiple unit applications
YSC036-060E & YHC036E,YHC037E Units YSC072-120F,YHC048-092F,YHC047-120E Units

Unit Dimensions
RT-SVX21K-EN 13
Figure 2. 3-5 ton standard efficiency, 3 ton high efficiency
Notes:
1. All dimensions are in inches/millimeters.
2. ½ NPT Gas Connection
Figure 3. 3-5 ton standard efficiency, 3 ton high efficiency - roof curb
Note: All dimensions are in inches/millimeters.
7
4444 MMMM
4444 MMMM
10381038 MMMM
10531053 MMMM

Unit Dimensions
14 RT-SVX21K-EN
Figure 4. 3-5 ton standard efficiency, 3 ton high efficiency - unit clearance and roof opening
Note: All dimensions are in inches/millimeters.
CLEARANCE 36” (914 MM)
Figure 5. 6, 7½ (single) ton standard efficiency, 4-5 ton high efficiency
Note: All dimensions are in inches/millimeters.

Unit Dimensions
RT-SVX21K-EN 15
Figure 6. 6, 7½ (single) ton standard efficiency, 4-5 ton high efficiency - roof curb
Note: All dimensions are in inches/millimeters.
(2130 MM)
(356 MM)
Figure 7. 6, 7½ (single) ton standard efficiency, 4-5 ton high efficiency - unit clearance and roof opening
Note: All dimensions are in inches/millimeters.

Unit Dimensions
16 RT-SVX21K-EN
Figure 8. 7½ ton (dual) - 10 ton standard efficiency, 6 - 7½ (MCHE) ton high efficiency
Note: All dimensions are in inches/millimeters.
(TC MODELS)
2” ELECTRICAL CONNECTION
(SINGLE POINT POWER
WHEN HEAT INSTALLED)
1/2 NPT GAS CONNECTION
(80 mbh, 120 mbh)
3/4 NPT GAS CONNECTION
(150 mbh, 200 mbh, 250 mbh)
(YC MODELS)
Figure 9. 7½ ton (dual) - 10 ton standard efficiency, 6 - 7½ (MCHE) ton high efficiency - roof curb
Note: All dimensions are in inches/millimeters.
(2130 MM)
(356 MM)

Unit Dimensions
RT-SVX21K-EN 17
Figure 10. 7½ ton (dual) - 10 tons standard efficiency, 6 - 7½ (MCHE) ton high efficiency - unit clearance and roof
opening
Note: All dimensions are in inches/millimeters.
Figure 11. 7½ (dehumidification) - 10 ton high efficiency
Notes:
1. All dimensions are in inches/millimeters.
2. ½ or ¾ NPT Gas Connection
ALTERNATE CONDENSATE DRAIN
CONNECTION 3/4-14 NPT DIA.HOLE
50 7/8”
1292 MM
63 3/16”
1605 MM
99 11/16”
2532 MM
CONDENSER COIL
UNIT POWER WIRE
1 3/8”
(
35MM
)
DIA. HOLE
EVAPORATOR SECTION
ACCESS PANEL
47 7/8”
1216 MM
27 5/8”
701 MM
1/2 NPT GAS CONNECTION
˄80 mbh, 120mbh˅;
3/4 NPT GAS CONNECTION
(
150mbh
,
200mbh
,
250mbh
)
COMPRESSOR ACCESS PANEL
SERVICE GAUGE PORT
ACCESS 1 3/8” (35MM) DIA.
HOLE
CONTROL BOX SECTION
ACCESS PANEL
UNIT CONTROL WIRE
7/8”
(
22MM
)
DIA HOLE
INDOOR TOP PANEL
OUTDOOR TOP PANEL
2” ELECTRICAL CONNECTION
(SINGLE POINT POWER WHEN
HEAT INSTALLED)
or

Unit Dimensions
18 RT-SVX21K-EN
Figure 12. 7½ (dehumidification) - 10 ton high efficiency - roof curb
Notes:
1. All dimensions are in inches/millimeters.
13/4”
(
44 MM
)
2”
(
51 MM
)
84 1/2”
(2146 MM)
83 7/8”
(2130 MM)
60 3/8”
(1534 MM)
59 7/8”
(
1521 MM
)
14”
(
356 MM
)
2”
(
51 MM
)
56 3/8”
(1432 MM)
34 3/8”
(873 MM)
34 3/8”
(873 MM)
18 1/2”
(470 MM)
18 1/2”
(470 MM)
1”
(
25 MM
)
1”
(
25 MM
)
1”
(
25 MM
)
65/8”
(
168 MM
)
80 1/2”
(2045 MM)
CLEARANCE 18” (457 MM)FORHORIZONTAL
CLEARANCE36”(914 MM)FORDOWNFLOW
Figure 13. 7½ (dehumidification) - 10 ton high efficiency- unit clearance and roof opening
Notes:
1. All dimensions are in inches/millimeters.
99 11/16”
(2532 MM)
63 3/16”
(1605 MM)

RT-SVX21K-EN 19
Installation
Pre-Installation
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 -Washaffectedareasgentlywith soapand
warm water after handling.
Remove power to the unit and gain access to the electric
heat elements by removing the horizontal supply cover.
Visually inspect the heater elements for the following:
• Elements that are no longer secured to the white
ceramic insulator.
• Elements touching each other or touching metal.
• Severely kinked, drooping, or broken elements.
If an element has detached from its ceramic insulator,
carefully put it back into place.
Replace the heater elements if they present symptoms
noted in item 2 or 3 above.
Procedure
.
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, mask, 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.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
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 14. Corner weights

Installation
20 RT-SVX21K-EN
Table 1. Maximum unit & corner weights (lbs) and center of gravity dimensions (in.) - gas/electric models
Unit
Model No.
Maximum Model Weights(a) Corner Weights(b) Center of Gravity (in.)
Tons Shipping Net A B C D Length Width
3 YSC036E/YHC036E 607 532 165 137 95 134 31 19
4 YSC048E 638 563 175 145 101 142 31 19
5 YSC060E 688 613 190 158 110 155 31 19
6 YSC072F 805 710 222 217 121 150 41 22
7½ YSC090F 862 767 243 221 155 149 45 21
7½ YSC092F 990 847 265 249 173 160 46 21
8½ YSC102F 1047 904 279 252 187 186 44 22
10 YSC120F 1156 1058 345 242 258 213 41 23
3 YHC037E 676 606 178 162 126 139 33 19
4 YHC048E/YHC047E 858 763 238 200 148 176 40 23
4 YHC048F 806 711 226 199 144 143 44 22
5 YHC060E/YHC067E 917 822 261 218 156 187 40 22
5 YHC060F 850 755 239 214 152 151 44 21
6 YHC072F 965 822 250 245 174 153 47 21
7½ YHC092E 1552 1335 373 368 295 299 50 28
7½ YHC092F 1124 1026 340 233 249 204/ 50 28
8½ YHC102E 1579 1362 385 374 297 306 49 28
10 YHC120E 1589 1372 384 378 302 308 49 28
(a) Weights are approximate.
(b)Corner weights are given for information only.
Figure 15. Rigging and center of gravity
Table 2. Factory installed options (fiops)/accessory net weights (lbs)(a),(b)
YSC036E-060E
YHC036E,YHC037E YHC047E-067E YHC048F-060F YSC072F-102F YHC072F YHC092F, YSC120F YHC092E-120E
Net Weight Net Weight Net Weight Net Weight Net Weight
Accessory 3-5 T 4-5 T 6-8½ T 7½, 10 T 7½-10 T
Barometric Relief 7 10 10 10 10
Belt Drive Option (3 phase only) 31 31 — — —
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