Trane INTELLIPAK ™ ™ ™ ™ ™ Commercial Single-Zone Rooftop Air Conditioners with CV or VAV Control - Manual (Page 68)

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Unit Start-Up (Continued)
Exhaust Airflow Measurement
(Optional with all Units)
1. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit's terminal
block 1TB1 or the unit mounted disconnect switch 1S14.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote discon-
nects before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be inadvert-
ently energized. Failure to disconnect power before ser-
vicing could result in death or serious injury.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK
1TB1 OR UNIT DISCONNECT SWITCH 1S14.
2. Turn the 115 volt control circuit switch 1S1 and the 24
volt control circuit switch 1S70 to the "On" position.
3. 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 SAHF-PTG manual for CV or VAV ap-
plications for the SERVICE TEST screens and program-
ming instructions.
4. Use Table 4-1 to program the following system compo-
nents for operation by scrolling through the displays;
Exhaust Fan
Exhaust Dampers (100% Open, if applicable)
Fresh 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 desig-
nated in this step has elapsed. Press the ENTER key to
confirm this choice.
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshoot-
ing of this product, it may be necessary to work with live
electrical components. Have a qualified licensed electri-
cian 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.
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 op-
erating at full airflow capability, measure the amperage at
the exhaust fan contactor 1K17. If the amperage ex-
ceeds 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 Tables 4-3 & 4-4 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 TM Sensor Airflow Measurement
(Optional with all units equipped with an economizer)
1. 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 SAHF-PTG manual for CV or VAV ap-
plications for the SERVICE TEST screens and program-
ming instructions.
2. Use Table 4-1 to program the following system compo-
nents for Economizer operation by scrolling through the
displays;
Supply Fan (On)
Inlet Guide Vanes (100% Open, if applicable)
Fresh 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 desig-
nated 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 view
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.