Service Test Guide For Component Operation - Trane TKD Installation Operation & Maintenance

Service Test Guide for Component Operation

Test and setup of the ERM is performed during the first two steps of the rooftop test sequence.
Step 1 of the test simulates normal ventilation mode of the unit.
Step 2 of the test simulates free cooling mode.
During step 1, adjust the return air damper position by turning the minimum position potentiometer on the Economizer module (ECA).
In case of plate heat exchanger version (PHE) adjust the exhaust fan speed minimum reference by changing the corresponding parameters. See
Exhaust Fan Setup section in this manual.
Heat Recovery Wheel (ERW)
Step Mode
1 Fan On
2 Econ. Free cooling
Plate Heat Exchanger (PHE)
Step Mode
1 Fan On
2 Econ. Free cooling
If the damper actuator is operating in the opposite way as it should be, reverse the direction of the rotation selector switch as shown in figure
below.
Figure 10a - Damper actuator direction
10
Operation
Economizer
Indoor Fan
module
ON Minimum
ON 100% Open
Economizer
Indoor Fan
module
ON Minimum
ON 100% Open
Exhaust fan
ERW motor
speed
Nominal ON
Nominal Off
Plate heat ex-
Exhaust fan
changer by-pass
speed
damper
Minimum OFF
Maximum By-pass
0
1
Return air
mixing damper
Minimum
Closed
Return air
mixing damper
Minimum
Closed
RT-SVX42B-E4