Trane Intellipak 2 Service Manual

							Unit Startup
RT-SVX24K-EN111
internally connected for clockwise rotation with the
incoming power supply phased as A, B, C.
Proper electrical supply phasing can be quickly
determined and corrected before starting the unit by using
an instrument such as an Associated Research Model 45
Phase Sequence Indicator and following the steps below:
 [ ] Turn the field supplied disconnect switch that
provides power to terminal block or to the unit
mounted disconnect switch to the “Off” position.
 [ ] Connect the phase sequence indicator leads to the terminal
 block or unit mounted disconnect switch as
follows:
 [ ] Close the disconnect switch or circuit protector switc
 h that provides the supply power to the unit
terminal block or the unit mounted disconnect switch.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT
 DISCONNECT SWITCH.
 [ ] Observe the ABC and CBA phase indicator lights on the
 face of the sequencer. The ABC indicator light will
glow if the phase is ABC. If the CBA indicator light
glows, open the disconnect switch or circuit protection
switch and reverse any two power wires.
 [ ] Restore the main electrical power and recheck the phasing.
 If the phasing is correct, open the disconnect
switch or circuit protection switch and remove the
phase sequence indicator.
Voltage Supply and Voltage Imbalance
Voltage Supply
Electrical power to the unit must meet stringent
requirements for the unit to operate properly. Measure
each leg (phase-to-phase) of the power supply. Each
reading must fall within the utilization range stamped on
the unit nameplate. If any of the readings do not fall within
the proper tolerances, notify the power company to
correct this situation before operating the unit.
Voltage Imbalance
Excessive three phase voltage imbalance between phases
will cause motors to overheat and eventually fail. The
maximum allowable voltage imbalance is 2%. Measure
and record the voltage between phases 1, 2, and 3 and
calculate the amount of imbalance as follows:
% Voltage Imbalance = where;
AV (Average Voltage) =
V1, V2, V3 = Line Voltage Readings
VD = Line Voltage reading that deviates the farthest from the average voltage.
Example: If the voltage readings of the supply power
measured 221, 230, and 227, the average volts would be:
VD (reading farthest from average) = 221
The percentage of Imbalance equals:
The 2.2% imbalance in this example exceeds the maximum allowable imbalance of 2.0%. This much
imbalance between phases can equal as much as a 20%
current imbalance with a resulting increase in motor
winding temperatures that will decrease motor life. If the
voltage imbalance is over 2%, notify the proper agencies
to correct the voltage problem before operating this
equipment.Phase Sequence Leads Unit Power Terminal
Black (phase A) L1
Red (phase B) L2
Yellow (phase C) L3
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
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.
100xAV VD –
AV
----------------
-
Vo
lt1 Volt2 Volt3
++
3
-------------------------------------------------
211 230 227 ++
3
-----------------------------------
- 226 A v g=
100
x226 221 –
226
--------------------
- 2.2 pe r c e n t= 
						

							Unit Startup
11 2RT-SVX24K-EN
Table 37. Service test guide for component operation — part I of II
Component 
Being Tested COMPONENT CONFIGURATION
Supply Fan Return
Fan Exhaust
Fan Condenser
Fans Heat Stages
Compressor Stage
1231234
COMPRESSOR
90 - 105 Ton
1A  OFF    OFF   OFF  ALL OFF  OFF OFF OFF  ON OFF OFF OFF
1B  OFF    OFF   OFF  ALL OFF  OFF OFF OFF  ON ON OFF OFF
2A  OFF    OFF   OFF  ALL OFF  OFF OFF OFF  OFF OFF ON OFF
2B  OFF    OFF   OFF  ALL OFF  OFF OFF OFF  OFF OFF ON ON120 - 162 Ton
1A  OFF    OFF   OFF 1A-On /1B-Off/1C-Off/1D-Off  
2A-Off/2B-Off/2C-Off/2D-Off   OFF OFF OFF  ON OFF OFF OFF
1B  OFF    OFF   OFF  ALL OFF   OFF OFF OFF  ON ON OFF OFF
2A  OFF    OFF   OFF 1A-Off/1B-Off/1C-Off/1D-Off 
2A-On/2B-Off/2C-Off/2D-Off   OFF OFF OFF  OFF OFF ON OFF
2B  OFF    OFF   OFF  ALL OFF   OFF OFF OFF  OFF OFF ON ON  CONDENSER FANS 
 90 - 105 Ton  — Air Cooled
1A OFF OFF OFF 1A-On /1B-Off/1C-Off                                      
2A-Off/2B-Off/2C-Off  OFF OFF OFF   OFF OFF OFF   OFF
1B & 1C OFF OFF OFF 1A-Off/1B-On /1C-On                                    
2A-Off/2B-Off/2C-Off  OFF OFF OFF   OFF OFF OFF   OFF
2A OFF OFF OFF 1A-Off/1B-Off/1C-Off                                                                    \
                                                                        
2A-On /2B-Off/2C-Off  OFF OFF OFF   OFF OFF OFF   OFF
2B & 2C OFF OFF OFF 1A-On/1B-Off/1C-Off                                                                    \
           
2A-Off /2B-On /2C-On  OFF OFF OFF   OFF OFF OFF   OFF120 - 150 Ton — Air Cooled
1A OFF OFF OFF  1A-On /1B-Off/1C-Off/1D-Off                  
2A-Off/2B-Off/2C-Off/2D-Off  OFF OFF OFF   OFF OFF OFF   OFF
1B OFF OFF OFF  1A-Off/1B-On/1C-Off/ 1D-Off                  
2A-Off/2B-Off/2C-Off/ 2D-Off  OFF OFF OFF   OFF OFF OFF   OFF
1C & 1D OFF OFF OFF  1A-Off/1B-On/1C-On/ 1D-On                
2A-Off/2B-Off/2C-Off/ 2D-Off  OFF OFF OFF   OFF OFF OFF   OFF
2A OFF OFF OFF  1A-Off/1B-Off/1C-Off/ 1D-Off                  
2A-On /2B-Off/2C-Off & 2D-Off  OFF OFF OFF   OFF OFF OFF   OFF
2B & 2C OFF OFF OFF  1A-Off/1B-On/1C-Off/ 1D-Off                  
2A-Off/2B-On/2C-On/ 2D-Off  OFF OFF OFF   OFF OFF OFF   OFF
2D OFF OFF OFF  1A-Off/1B-On/1C-Off 1D-Off                  
2A-Off/2B-Off/2C-Off/ 2D-On  OFF OFF OFF   OFF OFF OFF   OFF
  100, 118, 128, 140, 162 Ton — Evaporative Condensing
1A OFF OFF OFF 1A 0 -100 %                                                            
2A  OFF  OFF OFF OFF   OFF OFF OFF   OFF
2A OFF OFF OFF 1A   OFF                                                                
2A 0 - 100%  OFF OFF OFF   OFF OFF OFF   OFF 
						

							Unit Startup
RT-SVX24K-EN11 3
 SUPPLY FAN  ON    ON    OFF    ALL OFF    OFF OFF OFF   OFF OFF OFF   OFF
 RETURN FAN  ON    ON    N/A    ALL OFF   OFF OFF OFF   OFF OFF OFF   OFF
 EXHAUST FAN  OFF    N/A    ON    ALL OFF   OFF OFF OFF   OFF OFF OFF   OFF
 GAS HEAT 
(Full Capacity)    ON     ON  OFF
 ALL OFF   ON ON ON  OFF OFF OFF   OFF
STAGE 1  ON     ON  OFF  ALL OFF   ON OFF ON  OFF OFF OFF   OFF
STAGE 2  ON     ON  OFF  ALL OFF   OFF  ON N/A  OFF OFF OFF   OFF
Full Modulating  ON     ON  OFF  ALL OFF  10% - 90% OFF OFF OFF   OFF
 ELECTRIC HEAT  ON   ON   OFF    ALL OFF   ON ON ON  OFF OFF OFF   OFF
Stage 1 ON  ON   OFF    ALL OFF  ON OFF OFF  OFF OFF OFF   OFF
Stage 2 ON  ON   OFF    ALL OFF  OFF ON OFF  OFF OFF OFF   OFF
Stage 3 ON  ON   OFF    ALL OFF  OFF OFF ON  OFF OFF OFF   OFF
 HYDRONIC HEAT  OFF    OFF    OFF    ALL OFF   100% Select   OFF OFF OFF   OFF
OUTSIDE AIR  DAMPERS  OFF    OFF    OFF  
 ALL OFF   100% Select   OFF OFF OFF   OFF
 EXHAUST  DAMPERS  OFF    OFF    OFF  
 ALL OFF   100% Select   OFF OFF OFF   OFF
EVAP COND Sump Pump  OFF    OFF    OFF    ALL OFF   100% Select   OFF OFF OFF   OFF
Sump Heater  OFF    OFF    OFF    ALL OFF   100% Select   OFF OFF OFF   OFF
Table 37. Service test guide for component operation — part I of II (continued)
Component 
Being Tested COMPONENT CONFIGURATION
Supply Fan Return
Fan Exhaust
Fan Condenser
Fans Heat Stages
Compressor Stage
1231234 
						

							Unit Startup
11 4RT-SVX24K-EN
Table 38. Service test guide for component operation — part II of II
Component 
Being Tested Component Configuration
Occ
Unocc Relay Sump Pump Sump Heater
Econo
Damper Exhaust
Damper VFD
Output
COMPRESSOR
90 - 105 Ton
1A Closed Closed 0%Default OFFOFF
1B Closed Closed 0%Default OFFOFF
2A Closed Closed 0%Default OFFOFF
2B Closed Closed 0%Default OFFOFF
120 - 162 Ton
1A Closed Closed 0%Default OFFOFF
1B Closed Closed 0%Default OFFOFF
2A Closed Closed 0%Default OFFOFF
2B Closed Closed 0%Default OFFOFF
 CONDENSER FANS 
 90 - 105 Ton  — Air Cooled
1A Closed Closed 0%Default OFFOFF
1B & 1C ClosedClosed 0%Default OFFOFF
2A Closed Closed 0%Default OFFOFF
2B & 2C ClosedClosed 0%Default OFFOFF
120 - 150 Ton — Air Cooled
1A Closed Closed 0%Default OFFOFF
1B Closed Closed 0%Default OFFOFF
1C & 1D ClosedClosed 0%Default OFFOFF
2A Closed Closed 0%Default OFFOFF
2B & 2C ClosedClosed 0%Default OFFOFF
2D Closed Closed 0%Default OFFOFF
  100, 118, 128, 140, 162 Ton — Evaporative Cooled
1A Closed Closed 0%Default OFFOFF
2A Closed Closed 0%Default OFFOFF
 SUPPLY FAN  ClosedClosed 100%Unocc OFFOFF
 RETURN FAN ClosedClosed 100%Default OFFOFF
 EXHAUST FAN ClosedClosed 100%Default OFFOFF
 GAS HEAT 
(Full Capacity)   Closed
Closed 100%Unocc OFFOFF
Stage 1 ClosedClosed 100%Unocc OFFOFF
Stage 2 ClosedClosed 100%Unocc OFFOFF
Full Modulating ClosedClosed 100%Unocc OFFOFF
 ELECTRIC HEAT ClosedClosed 100%Unocc OFFOFF
Stage 1 ClosedClosed 100%Unocc OFFOFF
Stage 2 ClosedClosed 100%Unocc OFFOFF
Stage 3 ClosedClosed 100%Unocc OFFOFF
 HYDRONIC HEAT ClosedClosed 100%Default OFFOFF
OUTSIDE AIR  DAMPERS Closed
Closed 100%Default OFFOFF
 EXHAUST DAMPERS ClosedClosed 100%Default OFFOFF
EVAP COND Sump Pump ClosedClosed 100%Default ONOFF
Sump Heater ClosedClosed 100%Default OFFON 
						

							Unit Startup
RT-SVX24K-EN11 5
Service Testing—Evaporative Condenser
Components
From the Compressor and Condenser Service Menu
screens—Head Pressure Control: AUTO or Head Pressure
Control: MANUAL
1. Select:
Head Pressure Control: MANUAL
Note: All outputs, Sump Control, Fan Stage Control and
Fan speed Control (per circuit where specified), will
be available for ON/OFF, OPEN/CLOSED, 0-100%
manual settings considering the stipulations in
Table 39 :
Notes:
 1. Sump Freeze Protection is active during AUTO but is inactive in service 
test modes (Head Pressure Control set to MANUAL). 
 2. Water Treatment Drain Request will be ignored in Service Test.
Verifying Proper Fan Rotation
Note: Fans controlled by VFD will run in the correct
direction even if phasing is incorrect.
1. Ensure that the “System” selection switch at the remote panel is in the “Off” position and the “Fan”
selection switch for constant volume units is in the
“Auto” position. (VAV and SZVAV units do not utilize a
“Fan” selection input.)
2. Close the disconnect switch or circuit protector switch that provides the supply power to the unit terminal
block 1TB1 or the unit mounted disconnect switch
1S14.
3. Turn the 115 volt control circuit switch 1S2 and the 24 v
 olt control circuit switch 1S3 to the “On” position.
4. Open the Human Interface access door, located in the unit
 control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate programming manual for
applications for the SERVICE TEST screens and
programming instructions. 5. Use
Table37, p.11 2to program the unit Fans for
operation by scrolling through the displays. All of the
F
 ans (Supply, Exhaust, and Condenser fans) can be
programmed to be “On”, if desired.
Refer to Figure69, p.11 6for the condenser fan
locations and the Human Interface designator.
6. Once the configuration for the Fans is complete, press the
 NEXT key until the LCD displays the “Start test in
__Sec.” screen. Press the + key to designate the delay
before the test is to start. This service test will begin
after theTEST START key is pressed and the delay
designated in this step has elapsed. Press the ENTER
key to confirm this choice.
7. Press the TEST START key to start the test. Remember that the delay designated in step 6 must elapse before
the fans will begin to operate.
8. Check the supply fan and the exhaust fans (if equipped) for
 proper rotation. The direction of rotation is
indicated by an arrow on the fan housings. Check the
condenser fans for clockwise rotation when viewed
from the top.
Table 39. Service test guide component operation—
ev
 aporative condenser
COMPONENT 
BEING TESTED Requirements (ON) Requirements 
(OFF)
Compressors Sump minimum level 
switch must be closed for 
a minimum of five minutes No Requirements
Sump Pump Sump minimum level 
switch must be closed for 
a minimum of five minutes No Requirements
Condenser Fans No Requirements No Requirements
Fill Valve Solenoid No Requirements No Requirements
Drain Valve Actuator No Requirements No Requirements Sump Heater No Requirements No Requirements
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury. 
						

							Unit Startup
11 6RT-SVX24K-EN
If all of the fans are rotating backwards;
a. Press the STOP key at the Human Interface Module
in the unit control panel to stop the fan operation.
b. Open the field supplied disconnect switch upstream of the rooftop unit. Lock the disconnect switch in the
open position while working at the unit.
c. Interchange any two of the field connected main power wires at the unit terminal block or the factory
mounted disconnect switch. Note:
Interchanging “Load” side power wires at the fan
contactors will only affect the individual fan
rotation. Ensure that the voltage phase sequence at
the main terminal block or the factory mounted
disconnect switch is ABC as outlined in the
“Electrical Phasing” section.
If some of the fans are rotating backwards;
a. Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation.
b. Open the field supplied disconnect switch upstream of the rooftop unit. Lock the disconnect switch in the
open position while working at the unit.
c. Interchange any two of the fan motor leads at the contactor for each fan that is rotating backwards.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.
Figure 69. Air-cooled (90-150 tons)/evaporative (100-162 tons) condenser fan locations with human interface designator
2B92B11
2B102B12
2B14
2B15
2B13 2B16
2B9
1K9
01K1
01B2
2B11 1K10
4K1
21B2
11K1
31B2
21K1
41B2
2B15 1K12
2B16 1K1
Condenser Fan Motor Designator Condenser Fan contactor 
Designator
120 TON
130 TON 
150 TON
2B5 2B6
2B5 1K4*
*1K1
6B2
Condenser Fan Motor Designator Condenser Fan contactor 
Designator
100 TON
118 TON 
128 TON
140 TON
162 TON
*Note: 2B5 and 2B6 are initiated with operation of 
1K4 and 1K1 compressor contactors. 
						

							Unit Startup
RT-SVX24K-EN11 7
System Airflow Measurements
Constant Volume Systems
1. Ensure that the “System” selection switch at the
remote panel is in the “Off” position and the “Fan”
selection switch for constant volume units is in the
“Auto” position.
2. Close the disconnect switch or circuit protector switch that provides the supply power to the unit terminal
block or the unit mounted disconnect switch.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT
 DISCONNECT SWITCH.
3. Turn the 115 volt control circuit switch and the 24 volt control
 circuit switch to the “On” position.
4. Open the Human Interface access door, located in the unit
 control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate programming manual for CV
applications for the SERVICE TEST screens and
programming instructions.
5. Use Table37, p.11 2to program the Supply Fan for
operation by scrolling through the displays.
6. Once the configuration for the Fan is complete, press the
 NEXT key until the LCD displays the “Start test in
__Sec.” screen. Press the +key to designate the delay
before the test is to start. This service test will begin
after theTEST START key is pressed and the delay
designated in this step has elapsed. Press the ENTER
key to confirm this choice.
7. Press the TEST START key to start the test. Remember that the delay designated in step 6 must elapse before
the fans will begin to operate.
8. With the system in the SERVICE MODE and the supply fan
 rotating in the proper direction, measure the amperage at the supply fan contactors. If the
amperage exceeds the motor nameplate value, the
static pressure is less than design and the airflow is too
high. If the amperage is below the motor nameplate
value, static pressure may be too high and CFM may be
too low. To determine the actual CFM (± 5%);
a. Measure the actual fan RPM
b.
 Calculate the Theoretical BHP
Actual Motor Amps X Motor HP Motor Nameplate Amps
c. Plot this data onto the appropriate Fan Performance Curve beginning with Figure 62, p. 100. Where the
two points intersect, read straight down to the CFM
line.
Use this data to assist in calculating a new fan drive if the
CFM is not at design specifications.
An alternate method with less accuracy is to measure the static pressure drop across the evaporator coil.This can be
accomplished by;
a. drilling a small hole through the unit casing on eachside of the coil.
Note: Coil damage can occur if care is not taken when
drilling holes in this area.
b. Measure the difference between the pressures at both locations.
c. Plot this value onto the appropriate pressure drop curve beginning with Figure 71, p. 120. Use the data
in Table 40, p. 127 (Component Static Pressure
Drops) to assist in calculating a new fan drive if the
CFM is not at design specifications.
d. Plug the holes after the proper CFM has been established.
9. Press the STOP key at the Human Interface Module in the
 unit control panel to stop the fan operation.
Variable Air Volume Systems
1. Ensure that the “System” selection switch at theremote panel is in the “Off” position.
2. Close the disconnect switch or circuit protector switch that
 provides the supply power to the unit terminal
block or the unit mounted disconnect switch.
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
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury. 
						

							Unit Startup
11 8RT-SVX24K-EN
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT DISCONNECT SWITCH.
3. Turn the 115 volt control circuit switch and the 24 volt
control circuit switch to the “On” position.
4. Open the Human Interface access door, located in the unit
 control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate Programming Manual for
VAV applications for the SERVICE TEST screens and programming instructions.
Use T
able 37, p. 112 to program the following system
components for operation by scrolling through the
displays:
Supply Fan,
Variable Frequency Drive (100% Output, if applicable), RTM Occ/Unocc Output (Unoccupied)
5. Once the configuration for the components is complete,
 press the NEXT key until the LCD displays
the “Start test in __Sec.” screen. Press the +key to
designate the delay before the test is to start. This
service test will begin after the TEST START key
is pressed and the delay designated in this step has
elapsed. Press the ENTER key to confirm this choice.
6. Press the TEST START key to start the test. Remember that the delay designated in step 6 must elapse before
the fan will begin to operate.
7. With the VFD at 100% and the supply fan operating at full
 airflow capability, measure the amperage at the
supply fan contactors. If the amperage exceeds the
motor nameplate value, the static pressure is less than
design and the airflow is too high. If the amperage is
below the motor nameplate value, static pressure may be too high and CFM may be too low.To determine the
actual CFM (± 5%);
a. Measure the actual fan RPM
b.
 Calculate the Theoretical BHP
Actual Motor Amps X Motor HP Motor Nameplate Amps
c. Plot this data onto the appropriate Fan Performance Curve beginning with Figure 62, p. 100. Where the
two points intersect, read straight down to the CFM
line.
Use this data to assist in calculating a new fan drive if the
CFM is not at design specifications.
An alternate method with less accuracy is to measure the static pressure drop across the evaporator coil.This can be
accomplished by:
a. drilling a small hole through the unit casing on eachside of the coil.
Note: Coil damage can occur if care is not taken when
drilling holes in this area.
b. Measure the difference between the pressures at both locations.
c. Plot this value onto the appropriate pressure drop curve beginning with Figure 71, p. 120. Use the data
in Table 40, p. 127 (Component Static Pressure
Drops) to assist in calculating a new fan drive if the
CFM is not at design specifications.
d. Plug the holes after the proper CFM has been established. Press the STOP key at the Human
Interface Module in the unit control panel to stop
the fan operation.
8. Press the STOP key at the Human Interface Module in
 the unit control panel to stop the fan operation.
Exhaust Airflow Measurement (Optional)
1. Close the disconnect switch or circuit protectorswitch that provides the supply power to the units
terminal block or the unit mounted disconnect
switch.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT DISCONNECT SWITCH.
2. Turn the 115 volt control circuit switch and the 24 volt control
 circuit switch to the “On” position.
3. Open the Human Interface access door, located in the
 unit control panel, and press the SERVICE MODE
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
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components 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. 
						

							Unit Startup
RT-SVX24K-EN11 9
key to display the first service screen. Refer to the
latest edition of the appropriate programming
manual for applications for the SERVICE TEST
screens and programming instructions.
4. Use Table37, p.11 2to program the following system
components for operation by scrolling through the
displays:
Exhaust Fan,
Exhaust Dampers (100% Open, if applicable),
Outside air dampers (100% Open),
Variable Frequency Drive (100%, if applicable), RTM Occ/Unocc Output (Default)
5. Once the configuration for the components is complete,
 press the NEXT key until the LCD displays
the “Start test in __Sec.” screen. Press the +key to
designate the delay before the test is to start. This
service test will begin after the TEST START
key is pressed and the delay designated in this step
has elapsed. Press the ENTER key to confirm this
choice.
6. Press the TEST START key to start the test. Remember
that the delay designated in step 5 must elapse before
the fans will begin to operate.
7. With the exhaust dampers open and the exhaust fan operating
 at full airflow capability, measure the
amperage at the exhaust fan contactor. If the
amperage exceeds the motor nameplate value, the
static pressure is less than design and airflow is too
high. If the amperage is below the motor nameplate
value, static pressure may be too high and CFM may be
too low. To determine the actual CFM (± 5%);
a. Measure the actual fan RPM
b.
 Calculate the Theoretical BHP
Actual Motor Amps X Motor HP Motor Nameplate Amps
Use appropriate figures beginning with Figure 71, p. 120
to calculate a new fan drive if the CFM is not at design
specifications.
8. Press the STOP key at the Human Interface Module in the
 unit control panel to stop the fan operation.
TRAQ™ Sensor Airflow Measurement
(Optional with all units equipped with an
economizer)
1. Open the Human Interface access door, located in theunit control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate programming manual for
applications for the SERVICE TEST screens and
programming instructions.
2. Use Table37, p.11 2to program the following system
components for Economizer operation by scrolling
through
 the displays;
Supply Fan (On)
Outside
 air dampers (Selected % Open)
Variable Frequency Drive (100% Output, if applicable) RTM Occ/Unocc Output (Unoccupied)
Outside Air CFM Setpoint
Outside Air Pre-Heater Operation (if applicable)
3. Once the configuration for the components is complete,
 press the NEXT key until the LCD displays
the “Start test in __Sec.” screen. Press the +key to
designate the delay before the test is to start. This
service test will begin after the TEST START key
is pressed and the delay designated in this step has
elapsed. Press the ENTER key to confirm this choice.
4. Press the TEST START key to start the test. Remember that
 the delay designated in step 3 must elapse before
the fans will begin to operate.
5. With the unit operating in the “TEST MODE”,
 the
amount of outside air flowing through the TRAQ
sensor can be viewed by switching to the “STATUS
MENU” screen “OA CFM.
6. Scroll to the “ECONOMIZER ENABLE/ECONOMIZER POSITION”
 screen by pressing the “NEXT” key and
read the corresponding damper opening percentage
(%).
7. Press the STOP key at the Human Interface Module in the
 unit control panel to stop the unit operation.
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury. 
						

							Unit Startup
120RT-SVX24K-EN
Performance Data
Supply Fan with or without Variable
Frequency Drive
Figure 70. Supply fan performance LOW CFM — 90/100 tons, 25” supply fan
Figure 71. Supply fan performance STANDARD CFM — 90/100 and 105/118 tons, 36” supply fan