Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual page 133

dampers are closed, can overload the supply fan motor and cause building pressurization control
problems due to improper CFM being delivered to the space.
The fresh air/return air damper linkage is connected to a crank arm with a series of holes that allows
the installer or operator to modify the amount of fresh air damper travel in order to match the return
static pressure. Refer to
Table 48, p. 134
illustrated in
To Adjust the Fresh Air Damper Travel:
1. Drill a 1/4" hole through the unit casing up stream of the return air dampers. Use a location that
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.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1S14.
2. Close the disconnect switch or circuit protector switch that provides the supply power to the
3. Turn the 115 volt control circuit switch 1S1 and the 24 volt control circuit switch 1S70 to the "On"
4. Open the Human Interface access door, located in the unit control panel, and press the SERVICE
5. Use
6. Once the configuration for the components is complete, press the NEXT key until the LCD
7. Press the TEST START key to start the test. Remember that the delay designated in step 6 must
8. With the fresh air dampers fully closed and the supply fan operating at 100% airflow
9. Press the STOP key at the Human Interface Module in the unit control panel to stop the fan
RT-SVX36G-EN
for the equivalent return air duct losses that correspond to each of the holes
Figure 56, p. 123.
will produce an accurate reading with the least amount of turbulence. Several locations may
be necessary, and average the reading.
unit's terminal block 1TB1 or the unit mounted disconnect switch 1S14.
position.
MODE key to display the first service screen. Refer to the latest edition of the applicable
programming manual for CV or VAV applications for the SERVICE TEST screens and
programming instructions.
Table 35, p. 108 to program the following system components for operation by scrolling
through the displays;
– Supply Fan (On)
– Variable Frequency Drive (100% Output, if applicable)
– RTM Occ/Unocc Output (Unoccupied)
– Fresh Air Dampers (Closed)
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 fan will begin to operate.
requirements, measure the return static pressure at the location determined in step 1.
operation.
WARNING
Unit Start Up
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