140
RT-SVX073A-EN
Table 51. Standard unit (no ERW) (economizer)
outside air damper travel adjustment/pressure drop
(inches w.c.) (continued)
45,500
0.48 0.99 1.79 2.22 2.62 -
42,000
0.41 0.85 1.53 1.89 2.23 2.69
38,000
0.34 0.69 1.25 1.55 1.83 2.20
34,000
0.27 0.56 1.00 1.24 1.46 1.76
30,000
0.21 0.43 0.78 0.97 1.14 1.37
90-118 Ton w/Economizer (includes mist eliminator)
CFM
Pressure Drop (inches w.c.)
47,250
0.81 1.88 - - - -
40,500
0.60 1.39 2.62 - - -
36,750
0.49 1.14 2.16 2.71 - -
31,500
0.36 0.84 1.59 1.99 2.36 2.87
28,000
0.28 0.66 1.25 1.57 1.87 2.27
25,000
0.22 0.53 1.00 1.25 1.49 1.81
23,000
0.19 0.45 0.85 1.06 1.26 1.53
Damper Position
Jackshaft rod end
location 1 1 1 2 1
Damper lever rod
end location 1 2 3 5 4
Jackshaft rod end
location 1 1 1 2 1
120-162 Ton w/Traq™ Damper (includes mist eliminator)
CFM
Pressure Drop (inches w.c.)
58,500
1.10 1.52 2.16 2.73
54,000
0.93 1.28 1.83 2.33
45,500
0.64 0.89 1.28 1.64 2.14
42,000
0.54 0.75 1.09 1.40 1.83
38,000
0.44 0.60 0.88 1.14 1.50
34,000
0.35 0.47 0.69 0.90 1.20
30,000
0.27 0.35 0.53 0.69 0.93
90-118 Ton w/Traq™ Damper (includes mist eliminator)
CFM
Pressure Drop (inches w.c.)
47,250
1.37 1.89 2.72
40,500
0.99 1.35 1.97 2.54
36,750
0.80 1.09 1.60 2.08 2.74
31,500
0.58 0.77 1.15 1.51 2.01
28,000
0.46 0.59 0.89 1.17 1.58
25,000
0.37 0.45 0.69 0.92 1.24
23,000
0.31 0.37 0.57 0.76 1.04
Standard Unit with Energy Recovery
Wheel
Economizer Damper Adjustment - ERW units
Outside & Return Air Damper Operation
The outside air and return air damper actuators are
accessible through from the filter section of the unit. The
outside air and return air dampers have individual actuators
that are linked electronically. The actuators are preset to 0
degrees from the factory. Refer to “Table 46, p. 170,” for the
appropriate actuator position for the unit and operating
airflow (CFM).
To Adjust the Outside Air Damper Travel
1. Drill a 1/4" hole through the unit casing up stream of the
return air dampers and below the energy recovery
wheel. Use a location that will produce an accurate
reading with the least amount of turbulence. Several
locations may be necessary, and average the reading.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Important: HIGH VOLTAGE IS PRESENT AT
TERMINAL BLOCK OR UNIT
DISCONNECT SWITCH.
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.
3. Turn the 115 volt control circuit switch and the 24 volt
control circuit switch to the “On” position.
4. Open the user interface access door, located in the unit
control panel, and use the Manual override to operate
the Supply fan and Outdoor air damper position.
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.
Unit Startup
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