Trane Intellipak 2 Service Manual

							Installation
RT-SVX24K-EN81
Power Wire Sizing and Protection Devices
To correctly size electrical service wiring for a unit, find the
appropriate calculations listed below. Each type of unit has
its own set of calculations for MCA (Minimum Circuit
Ampacity), MOP (Maximum Overcurrent Protection), and RDE (Recommended Dual Element fuse size). Read the
load definitions that follow and then find the appropriate
set of calculations based on unit type.
Note: Set 1 is for cooling only and cooling with gas heat
units, and set 2 is for cooling with electric heat
units.
Load Definitions: (To determine load values, see the
Electrical Service Sizing Data Tables on the following
page.)
LOAD1 = CURRENT OF THE LARGEST MOTOR
(COMPRESSOR OR FAN MOTOR)
LOAD2 = SUM OF THE CURRENTS OF ALL REMAINING
MOTORS
LOAD3 = CURRENT OF ELECTRIC HEATERS
LOAD4 = ANY OTHER LOAD RATED AT 1 AMP OR MORE
Set 1. Cooling Only Rooftop Units and Cooling
with Gas Heat Rooftop Units
MCA = (1.25 x LOAD1) + LOAD2 + LOAD4
MOP = (2.25 x LOAD1) + LOAD2 + LOAD4
Select a fuse rating equal to the MOP value. If the MOP
value does not equal a standard fuse size as listed in NEC
240-6, select the next lower standard fuse rating.
Note: If selected MOP is less than the MCA, then select
the lowest standard maximum fuse size which is
equal to or larger than the MCA, provided the
selected fuse size does not exceed 800 amps.
RDE=(1.5xLOAD1)+LOAD2+LOAD4
Select a fuse rating equal to the RDE value. If the RDE value
does not equal a standard fuse size as listed in NEC 240-6,
select the next higher standard fuse rating.
Note: If the selected RDE is greater than the selected MOP
value, then select the RDE value to equal the MOP
value.
Set 2. Rooftop units with Electric Heat
To arrive at the correct MCA, MOP, and RDE values for
these units, two sets of calculations must be performed.
First calculate the MCA, MOP, and RDE values as if the unit
was in cooling mode (use the equations given in Set 1).
Then calculate the MCA, MOP, and RDE values as if the unit were in the heating mode as follows.
(Keep in mind when determining LOADS that the
compressors dont run while the unit is in the heating
mode).
MCA = 1.25 x (LOAD1 + LOAD2 + LOAD4) + LOAD3
The nameplate MCA value will be the larger of the cooling mode MCA value or the heating mode MCA value
calculated above.
MOP = (2.25 x LOAD1) + LOAD2 + LOAD3 + LOAD4
The selection MOP value will be the larger of the cooling mode MOP value or the heating mode MOP value
calculated above.
Select a fuse rating equal to the MOP value. If the MOP
value does not equal a standard fuse size as listed in NEC
240-6, select the next lower standard fuse rating.
Note: If selected MOP is less than the MCA, then select
the lowest standard maximum fuse size which is
equal to or larger than the MCA, provided the
selected fuse size does not exceed 800 amps.
RDE=(1.5xLOAD1)+LOAD2+LOAD3+LOAD4
The selection RDE value will be the larger of the cooling mode RDE value or the heating mode RDE value calculated
above.
Select a fuse rating equal to the RDE value. If the RDE value
does not equal a standard fuse size as listed in NEC 240-6,
select the next higher standard fuse rating.
Notes:
 If the selected RDE is greater than the selected MOP
value, then select the RDE value to equal the MOP
value.
 On 90 to 162 ton rooftops, the selected MOP value is
stamped in the MOP field on the nameplate.
Table 22. Electrical service sizing data
Nom Tons Compressor
Nominal Voltage
460 V 575 V 380 V
Size Number 
per Unit Capacity kW (ea.)
RLA 
(ea.) LRA 
(ea.) RLA 
(ea.) LRA 
(ea.) RLA 
(ea.) LRA 
(ea.)
60 Hz 50 Hz
Std. Coil High Cap 
Std. CoilHigh Cap 
90/100 240 4 21.3 21.6 17.6 17.9 34.1 215 27.3 175 34.0 215
105/118 240 2 24.2 24.5 20.2 20.3 34.1 215 27.3 175 34.0 215
300 2 25.0 25.3 20.9 21.0 44.7 260 35.8 210 44.6 260
120/128 300 4 26.9 27.8 22.4 23.0 44.7 260 35.8 210 44.6 260
130/140 300 2 28.5 28.8 23.8 23.8 44.7 260 35.8 210 44.6 260
380 2 33.7 34.2 28.2 28.2 52.1 320 41.1 235 52.0 320
150/162 380 4 34.7 -- 28.7 -- 52.1 320 41.1 235 52.0 320 
						

							Installation
82RT-SVX24K-EN
Table 23. Electrical service sizing data—motors
Condenser Fan Motors
Nominal  Tons  No. of Fans 460 V 575 V 380 V
FLA FLA FLA
90, 105 6 16.2 13.2 15
120, 130,  150 8 21.6 17.6 20
100 2 11.8 N/A N/A
118, 128,  140, 162 2 11.8 N/A N/A
Supply Fan Motors
Motor 
Horsepow er 460 V 575 V 380 V
FLA FLA FLA
15 18.5 15.1 24
20 24.7 19.6 29
25 3124.5 38
30 36.6 29.2 47
40 49.0 3954
50 60.5 4868
60 71.5 57.2 81
75 9072103
100 115 92N/A
Exhaust/Return Fan Motors
Motor 
Horsepow er 460 V 575 V 380 V
FLA FLA FLA
7.5 9.47.8 13.6
10 12.6 10.1 16
15 18.5 15.1 24
20 24.7 19.6 29
25 3124.5 38
30 36.6 29.2 47
40 49.0 3954
50 60.5 4868
60 71.5 57.2 81
Table 24. Electrical service sizing data—electric heat
module (electric heat units only)
Voltage
460 575 380
Module kW FLA FLA FLA
90 / 56 108.386.685.1
140 / 88 168.4134.7133.7
265 / 166 318.8255252.2
300 / 188 360.8288.7285.6
Table 25. Electrical service sizing data—control power
transformer (heating mode only)
Nominal Tons  Digit 2 Unit 
Function Voltages
460 575 380 FLA FLA FLA
90-150/100-162 E, L, S, X 3 3 4
90, 105/100, 118 F (850 MBH) 4 4 5
90, 105/100, 118 F (1100 MBH) 4 4 5
90, 105/100, 118 F (1800 MBH) 4 4 5
120-150/128-162 F (1100 MBH) 4 4 5
120-150/128-162 F (1800 MBH) 4 4 5
120-150/128-162 F (2500 MBH) 4 4 5
Table 26. Electrical service sizing data—crankcase heater
Nominal Tons Voltage
460 575 380
FLA (add) FLA
(add) FLA
(add)
90-162 11 1
Table 27. Voltage utilization range
Unit Voltage
460/60/3 414-506
575/60/3
(a)
(a) Units with air-cooled condensers only. 
517-633
380/50/3
(i)342-418
Table 28. Electrical service sizing data—evaporative condenser
Unit Part kwHPVoltage 
460FLA
Pump 
1.5 2.7
Sump Heater3 3.8
Table 29. Electrical service sizing data—energy recovery
wheel motor
Nominal Tons Unit Function Voltages
460 575 FLA FLA
90-128 1 (Low CFM ERW) 1.2 0.95
130-162 1 (Low CFM ERW) 1.7 1.4 90-162 2 (Std. CFM ERW) 1.7 1.4 
						

							Installation
RT-SVX24K-EN83
Field Installed Control Wiring
The Rooftop Module (RTM) must have a mode input in
order to operate the rooftop unit. The flexibility of having
several system modes depends upon the type of sensor
and/or remote panel selected to interface with the RTM. An
overall layout of the various control options available, with
the required number of conductors for each device, is
illustrated beginning with Figure 57, p. 89.
Note: All field wiring must conform to NEC guidelines as
well as state and local codes.
The various field installed control panels, sensors, switches, and contacts discussed in this section require
both AC and DC consideration. These diagrams are
representative of standard applications and are provided
for general reference only. Always refer to the wiring
diagram that shipped with the unit for specific electrical
schematic and connection information.
Controls using 24 VAC
Before installing any connecting wiring, refer to Figure 10,
p. 23 for the electrical access locations provided on the unit and
Table 32, p. 83 for AC conductor sizing guidelines,
and;
a. Use copper conductors unless otherwise specified.
b. Ensure that the AC control wiring between thecontrols and the units termination point does not
exceed three (3) ohms/conductor for the length of
the run.
Note: Resistance in excess of 3 ohms per conductor may
cause component failure due to insufficient AC
voltage supply.
c. Be sure to check all loads and conductors for grounds, shorts, and miswiring.
d. Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring.
Controls using DC Analog Input/Outputs
Before installing any connecting wiring between the unit
and components utilizing a DC analog input\output signal,
refer to the appropriate illustration in Figure 10, p. 23for
the electrical access locations provided on the unit and
Table 33, p. 83 for conductor sizing guidelines and;
e. Use standard copper conductor thermostat wire unless otherwise specified.
f. Ensure that the wiring between the controls and the unit termination point does not exceed two and a
half (2.5) ohms/conductor for the length of the run.
Note: Resistance in excess of 2.5 ohms per conductor can
cause deviations in the accuracy of the controls.
g. Do not run the electrical wires transporting DC signals in or around conduit housing high voltage
wires.
Units equipped with a Trane BACnet® Communication
Interface (BCI) or LonTalk® communication Interface (LCI)
option which utilizes a serial communication link; a. Must be 18 AWG shielded twisted pair cable(Belden 8760 or equivalent).
b. Must not exceed 5,000 feet maximum for each link.
Table 30. Electrical service sizing data—convenience
outlet transformer
Nominal Tons Voltage
460 575
FLA (add) FLA (add)
90-162 3.32.6
Table 31. Compressor data
Unit Size Number 
of 
Compress ors Compress
or Size Compress
or 
Designat or Compress
or Type
90/100 Ton Std &  Hi-Capacity 2 CSHN250 1A, 2A Scroll
2 CSHN250 1B, 2B Scroll
105/118 Ton Std &  Hi-Capacity 2 CSHN250 1A, 2A Scroll
2 CSHN315 1B, 2B Scroll
120/128 Ton Std &  Hi-Capacity 2 CSHN315 1A, 2A Scroll
2 CSHN315 1B, 2B Scroll
130/140 Ton Std &  Hi-Capacity 2 CSHN315 1A, 2A Scroll
2 CSHN374 1B, 2B Scroll
150/162 Ton Std  2 CSHN374 1A, 2A Scroll
2 CSHN374 1B, 2B Scroll
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.
Table 32. AC conductors
Distance from Unit to Control Recommended Wire Size
000-460 feet 18 gauge
461-732 feet 16 gauge
733-1000 feet 14 gauge
Table 33. DC conductors
Distance from Unit to Control Recommended Wire Size
000-150 feet22 gauge
151- 240 feet 20 gauge
241- 385 feet 18 gauge
386- 610 feet 16 gauge
611- 970 feet 14 gauge 
						

							Installation
84RT-SVX24K-EN
c. Must not pass between buildings.
Constant Volume System Controls
Remote Panel w/o NSB—BAYSENS110*
This electronic sensor features four system switch settings
(Heat, Cool, Auto, and Off) and two fan settings (On and
Auto) with four system status LEDs. It is a manual or automatic changeover control with dual setpoint
capability. It can be used with a remote zone sensor
BAYSENS077*. Refer to Table 34, p. 87for the
Temperature vs. Resistance coefficient.
Constant Volume Zone Panel -BAYSENS108*
This electronic sensor features four system switch settings (Heat, Cool, Auto, and Off) and two fan settings (On and
Auto). It is a manual or automatic changeover control with dual setpoint capability.
Variable Air Volume System Controls
VAV Changeover Contacts
The changeover input is used with modulating gas heat, electric heat, or hydronic heat. When the contacts are
closed, the unit will control to the discharge heating
setpoint. Refer to the unit wiring diagram for the field
connection terminals in the unit control panel. The switch
must be rated at 12 ma @ 24 VDC minimum.
Constant Volume or Variable Air Volume
System Controls
Remote Human Interface Module
The remote Human Interface module enables the operatorto set or modify the operating parameters of the unit using
a 16 key keypad and to view the operating status of the unit
on the 2 line, 40 character LCD screen without leaving the
building. However, the Remote Human Interface module
can not be used to perform any service functions.
One remote panel is designed to monitor and control up to
four units providing each of the units are equipped with an
IPCB module. Use the installation instructions that
shipped with the module to install it, and the appropriate
illustrations beginning with Figure 57, p. 89to connect it to
the unit.
Remote Panel w/ NSB -BAYSENS119*
This 7 day programmable sensor features four periods for Occupied\Unoccupied programming per day. Either one
or all four periods can be programmed. If the power is
interrupted, the program is retained in permanent
memory. If power is off longer than 2 hours, only the clock
and day may have to be reset.
The front panel allows selection of Occupied/Unoccupied periods with two temperature inputs (Cooling Supply Air
Temperature and Heating Warm-up temperature) per occupied period.
The occupied cooling setpoint ranges between 40 and 80°F. The warm-up setpoint ranges between 50 and 90°F
with a 2 degree deadband. The Unoccupied cooling
setpoint ranges between 45 and 98°F.The heating setpoint
ranges between 43 and 96°F.
The liquid crystal display (LCD) displays zone temperature, temperature setpoints, week day, time, and operational
mode symbols.The DIP switches on the subbase are used
to enable or disable applicable functions, i.e.; Morning
warm-up, economizer minimum position override during
unoccupied status, heat installed, remote zone
temperature sensor, 12/24 hour time display, and daytime
warm-up. Refer to Table 34, p. 87for the Temperature vs.
Resistance coefficient. During an occupied period, an
auxiliary relay rated for 1.25 amps @ 30 volts AC with one
set of single pole double throw contacts is activated.
Remote Zone Sensor (BAYSENS073*)
This electronic analog sensor features remote zone sensing and timed override with override cancellation. It is
used when the RTM has been programmed as the source
for zone temperature control. Refer to Table 34, p. 87for
the Temperature vs. Resistance coefficient.
Remote Zone Sensor (BAYSENS074*)
This electronic analog sensor features single setpoint capability and timed override with override cancellation. It
is used with a Trane Integrated Comfort
TMsystem. Refer to
Table 34, p. 87 for the Temperature vs. Resistance
coefficient.
Remote Zone Sensor (BAYSENS016*)
This bullet type analog Temperature sensor can be used for; outside air (ambient) sensing, return air temperature
sensing, supply air temperature sensing, remote
temperature sensing (uncovered), morning warm-up
temperature sensing, and for VAV zone reset. Wiring
procedures vary according to the particular application
and equipment involved. When this sensor is wired to a
BAYSENS119* Remote Panel, wiring must be 18 AWG
ShieldedTwisted Pair (Belden 8760 or equivalent). Refer to
Table 34, p. 87 for the Temperature vs. Resistance
coefficient.
Remote Zone Sensor (BAYSENS077*)
This electronic analog sensor can be used with BAYSENS119* or 021* Remote Panels. When this sensor is
wired to a BAYSENS119* Remote Panel, wiring must be 18
AWG Shielded Twisted Pair (Belden 8760 or equivalent). Refer to the specific Remote Panel for wiring details.
CO2Sensing—Space or Duct
The CO2sensor shall have the ability to monitor space
occupancy levels within the building by measuring the
parts per million of CO
2in the air. As the CO2levels
increase, the outside air damper modulates to meet the
CO
2space ventilation requirements. 
						

							Installation
RT-SVX24K-EN85
Remote Minimum Position Potentiometer
(BAYSTAT023*)
The remote minimum position potentiometer is used on
units with an economizer. It allows the operator to
remotely set the economizer minimum position (which
controls the amount of outside air entering the unit). Use
the installation instructions that shipped with the
potentiometer to install it, and the appropriate illustrations
beginning with Figure 57, p. 89to connect it to the unit.
Single Zone Variable Air Volume & Rapid
Restart System Control
Remote Zone Sensor (BAYSENS016*)
This bullet-type, analog temperature sensor can be used
for supply air and return air temperature sensing. Wiring
procedures vary according to application and equipment.
When this sensor is wired to a BAYSENS119* Remote Panel, wiring must be 18 AWG Shielded Twisted Pair
(Belden 8760 or equivalent). Refer to Table 34, p. 87for the
Temperature vs. Resistance coefficient.
External Auto/Stop Switch
A field supplied single pole single throw switch may be used to shut down the unit operation. This switch is a
binary input wired to the RTM. When opened, the unit
shuts down immediately and can be cancelled by closing
the switch. Refer to the appropriate illustrations beginning
with Figure 57, p. 89 for the proper connection terminals in
the unit control panel. The switch must be rated for 12 ma
@ 24 VDC minimum.
Emergency Override
When a Lontalk®/BACnet® communication module is installed, the user can initiate from the Trane Tracer
Summit or 3rd party BAS one of five (5) predefined, not
available to configure, Emergency Override sequences. All
compressors, condenser fans and the Humidification
output are deenergized for any Emergency Override
sequence. Each Emergency Override sequence
commands the unit operation as follows:
1. PRESSURIZE_EMERG:
– Supply Fan - On
– Supply Fan VFD Open/Max (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if soequipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so equipped) – Return VFD - Min (if so equipped)
2. EMERG_DEPRESSURIZE:
– Supply Fan - Off
–
Supply Fan VFD - Closed/Min (if so equipped)
– Exhaust Fan - On; Exhaust Dampers Open/Max (if so equipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so equipped)
– Return VFD - Max (if so equipped)
3. EMERG_PURGE:
– Supply Fan - On
–
Supply Fan VFD - Open/Max (if so equipped)
– Exhaust Fan - On; Exhaust Dampers Open (if so equipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so equipped)
– Return VFD - Max (if so equipped)
4. EMERG_SHUTDOWN:
– Supply Fan - Off
–
Supply Fan VFD - Closed/Min (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if so equipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so equipped)
– Return VFD - Min (if so equipped)
5. EMERG_FIRE - Input from fire pull box/system:
– Supply Fan - Off
–
Supply Fan VFD - Closed/Min (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if so equipped) 
						

							Installation
86RT-SVX24K-EN
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so
equipped)
– Return VFD - Min (if so equipped)
Ventilation Override Module (VOM)
Important: The ventilation override system should not
be used to signal the presence of smoke
caused by a fire, as it is not intended nor
designed to do so.
The user can customize up to five (5) different override sequences for purposes of ventilation override control. If
more than one VOM sequence is being requested, the
sequence with the highest priority is initiated first.
Sequence hierarchy is the sequence “A” (UNIT OFF) is first,
with sequence “E” (PURGE with Duct Pressure Control)
last. A ventilation override mode can be initiated by
closing any of the five (5) corresponding binary inputs on
the VOM module. A binary output is provided on the VOM
module to provide remote indication of an active VOM
mode. All compressors, condenser fans and the
Humidification output are deenergized for any VOM
sequence. The factory default definitions for each mode
are as follows:
1. UNIT OFF sequence “A”
When complete system shutdown is required the following sequence can be used.
– Supply Fan - Off
– Supply Fan VFD - Closed/Min (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if soequipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Deenergized
– VOM Relay - Energized
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so equipped)
– Return VFD - Min (if so equipped)
– OA Bypass Dampers - Open (if so equipped)
– Exhaust Bypass Dampers - Open (if so equipped)
2. PRESSURIZE sequence “B”
Perhaps a positively pressurized space is desired instead
of
 a negatively pressurized space. In this case, the supply fan should be turned on with VFD at 100% speed and
exhaust fan should be turned off.
– Supply Fan - On
– Supply Fan VFD - Max (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if soequipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so equipped)
– Return VFD - Min (if so equipped)
– OA Bypass Dampers - Open (if so equipped)
– Exhaust Bypass Dampers - Open (if so equipped)
3. EXHAUST sequence “C”
With only the exhaust fans running (supply fan off), the space
 that is conditioned by the rooftop would become
negatively pressurized. This is desirable for clearing the
area of smoke from the now-extinguished fire, possibly
keeping smoke out of areas that were not damaged.
– Supply Fan - Off
– Supply Fan VFD - Closed/Min (if so equipped)
– Exhaust Fan - On; Exhaust Dampers - Open (if soequipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Deenergized
– VOM Relay - Energized
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so equipped)
– Return VFD - Max (if so equipped)
– OA Bypass Dampers - Open (if so equipped)
– Exhaust Bypass Dampers - Open (if so equipped)
4. PURGE sequence “D”
Possibly this sequence could be used for purging the air
out
 of a building before coming out of Unoccupied mode
of operation on VAV units or for the purging of smoke or
stale air if required after a fire.
– Supply Fan - On
– Supply Fan VFD - Max (if so equipped)
– Exhaust Fan - On; Exhaust Dampers - Open (if soequipped)
– OA Dampers - Open; Return Damper - Closed 
						

							Installation
RT-SVX24K-EN87
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so
equipped)
– Return VFD - Max (if so equipped)
– OA Bypass Dampers - Open (if so equipped)
– Exhaust Bypass Dampers - Open (if so equipped)
5. PURGE with duct pressure control sequence “E”
This sequence can be used when supply air control is required
 for smoke control.
– Supply Fan - On
– Supply Fan VFD - (If so equipped) Controlled by Supply Air Pressure Control function; Supply Air
Pressure High Limit disabled
– Exhaust Fan - On; Exhaust Dampers Open (if so equipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so equipped)
– Return VFD - Max (if so equipped)
– OA Bypass Dampers - Open (if so equipped)
Exhaust Bypass Dampers - Open (if so equipped)
Temperature vs. Resistance Coefficient
The UCM network relies on various sensors located throughout the system to provide temperature
information in the form of an analog input. All of the
sensors used have the same temperature vs. resistance
co-efficient and are made from Keystone Carbon D97
material with a 1 degree Centigrade tolerance.
Emergency Stop Input
A normally closed (N.C.) switch wired to the RTM may beused during emergency situations to shut down all unit
operations. When opened, an immediate shutdown
occurs. An emergency stop diagnostic is entered into the
Human Interface and the unit must be manually reset.
Refer to the appropriate illustrations in Figure 57, p. 89
Figure 59, p. 91 for the proper connection terminals in the
unit control panel. The switch must be rated for 12 ma @
24 VDC minimum.
External Stop Input
A normally closed (N.C.) switch wired to the RTM may be used during emergency situations to shut down all unit
operations. When opened, an immediate shutdown
occurs. When the contacts are closed, the unit will resume
normal operation after minimum delays have occurred.
Refer to the appropriate illustrations in Figure 57, p. 89for
the proper connection terminals in the unit control panel.
Occupied/Unoccupied Contacts
To provide Night Setback control if a remote panel with
NSB was not ordered, a field supplied contact must be
installed. This binary input provides the Occupied/
Unoccupied status information of the building to the RTM.
It can be initiated by a time clock, or a Building Automation
System control output. The relay’s contacts must be rated
for 12 ma @ 24 VDC minimum. Refer to the appropriate
illustrations in Figure 58, p. 90 Figure 59, p. 91 for the
proper connection terminals in the unit control panel.
Demand Limit Relay
If the unit is equipped with a Generic BAS Module, a
normally open (N.O.) switch may be used to limit the
electrical power usage during peak periods. When
demand limit is initiated, the mechanical cooling and
Table 34. Temp vs. resistance
Temp (F)
Resistance (in. 
1000 Ohms) Temp (F) Resistance (in. 
1000 Ohms)
-40 346.10 7111.60
-30 241.70 7211.31
-20 170.10 7311.03
-10 121.40 7410.76
-5 103.00 7510.50
0 87.56 7610.25
5 74.65 7710.00
10 63.80 789.76
15 54.66 799.53
2046.94 809.30
25 40.40 858.25
30 34.85 907.33
35 30.18 1005.82
40 26.22 1055.21
45 22.85 1104.66
50 19.96 1203.76
55 17.47 1303.05
60 15.33 1402.50
65 13.49 1502.05
66 13.15 1601.69
67 12.82 1701.40
68 12.5 1801.17
69 12.19 1900.98
70 11.89 2000.83
Table 34. Temp vs. resistance (continued)
Temp (F)Resistance (in. 
1000 Ohms) Temp (F) Resistance (in. 
1000 Ohms) 
						

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88RT-SVX24K-EN
heating operation is limited to either 50% or 100%.
Demand limit can be initiated by a toggle switch closure,
a time clock, or an ICS
TMcontrol output. These contacts
must be rated for 12 ma @ 24 VDC minimum.
Outside Air Sensor—BAYSENS016*
This device senses the outdoor air temperature and sends this information in the form of an analog input to the RTM.
Its factory installed on units with an economizer, but can
be field provided/installed and used for informational
purposes on units without an economizer. Refer to the
appropriate illustrations in Figure 58, p. 90 Figure 59, p. 91
for the proper connection terminals in the unit control
panel. Refer to Table 34, p. 87for Temperature vs.
Resistance coefficient.
Generic Building Automation System
The Generic Building Automation System (GBAS) module allows a non-Trane building control system to
communicate with the rooftop unit and accepts external
setpoints in form of analog inputs for cooling, heating,
demand limiting, and supply air pressure parameters.
Refer to Figure 61, p. 93 &Table 35, p. 94 for the input
wiring to the GBAS module and the various desired
setpoints with the corresponding DC voltage inputs for
VAV, SZVAV and CV applications. 
						

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RT-SVX24K-EN89
Figure 57. Typical field wiring diagram for 90 to 162 ton CV control options 
						

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90RT-SVX24K-EN
Figure 58. Typical ventilation override binary output for 90 to 162 ton CV control options