Return Plenum Pressure Control (Units Equipped With Return Fan) - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Commercial single-zone rooftop air conditioners with cv, vav, or szvav controls
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Unit Start Up
3. Once the configuration for the components is complete, press the NEXT key until the LCD
4. Press the TEST START key to start the test. Remember that the delay designated in step 3 must
5. With the unit operating in the "TEST MODE" , the amount of outside air flowing through the Traq
6. Scroll to the "ECONOMIZER ENABLE/ECONOMIZER POSITION" screen by pressing the
7. Press the STOP key at the Human Interface Module in the unit control panel to stop the unit

Return Plenum Pressure Control (Units equipped with Return Fan)

"Return Plenum Pressure Max Setpoint" determination:
1. Open the Human Interface access door, located in the unit control panel, and press the SERVICE
2. If not already STOPPED, press the STOP key on the Human Interface (HI)
3. Under HI Service Menu, insure all outputs are OFF or CLOSED.
4. Press the Start Service Test key.
5. Adjust the Exhaust Damper Position to approx. 85%.
6. Start the Supply Fan and Return Fan.
7. Adjust the Supply Fan and Return Fan speeds to 100%.
8. Slowly adjust the Outside Air Damper to approx. 100%.
9. While measuring the building static pressure, slowly adjust the Return Fan Speed down until
10. Make note of the return plenum pressure reading on the HI.
11. Set the "Return Plenum Pressure Max Setpoint" parameter on the HI to the value noted in the
"OA Normalization" determination (Units equipped with TRAQs):
1. Perform a normal airflow balance of the unit.
2. Insure Exhaust Damper is approx. 85%, and the Supply Fan and Return Fan speed is 100%, and
3. Make note of the total TRAQ airflow reading on the Human Interface (HI).
4. Set the "OA Normalization" parameter on the HI to the value noted in the previous step.
118
– Variable Frequency Drive (100% Output, if applicable)
– RTM Occ/Unocc Output (Unoccupied)
– Outside Air CFM Setpoint
– Outside Air Pre-Heater Operation (if applicable)
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.
elapse before the fans will begin to operate.
sensor can be view by switching to the "STATUS MENU" screen "OA CFM" .
"NEXT" key and read the corresponding damper opening percentage (%).
operation.
MODE key to display the first service screen. Refer to the latest edition of the appropriate
programming manual for CV or VAV applications for the SERVICE TEST screens and
programming instructions.
the building pressure reaches design conditions.
previous step.
the Outdoor Air Damper is approx. 100%.
RT-SVX36G-EN

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