Unit Startup
146 RT-SVX24J-EN
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 44,
p. 148 for the appropriate actuator position for the unit and
operating airflow (CFM).
To Adjust DamperTravel
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.
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 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 applicable programming manual for
applications for the SERVICETEST screens and
programming instructions.
5. Use Table 29, p. 77 to program the following system
components
for operation by scrolling
through the
displays:
Supply Fan (On)
VFD Cmd (100%,
if applicable)
RTM Occ/Unocc Output
(Unoccupied)
OA Damper Pos (0%)
Outside Air Bypass Damper Pos (0%)
Exhaust Air Bypass Damper Pos (0%)
Table 43. Standard unit (no ERW) (economizer) outside
air damper travel adjustment/pressure drop
(inches w.c.)
Damper Position
Economizer
Linkage Set-up 1 2 3 4 5 6
Jackshaft rod
end location 1 1 2 2 2 2
Damper lever
configuration A B B B B B
Damper lever
rod end location 1 2 3 4 5 6
120-162 Ton w/Economizer (includes mist eliminator)
CFM Pressure Drop (inches w.c.)
58500 0.80 1.64 2.96 - - -
54000 0.68 1.40 2.52 - - -
45500 0.48 0.99 1.79 2.22 2.62 -
42000 0.41 0.85 1.53 1.89 2.23 2.69
38000 0.34 0.69 1.25 1.55 1.83 2.20
34000 0.27 0.56 1.00 1.24 1.46 1.76
30000 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.)
47250 0.81 1.88 - - - -
40500 0.60 1.39 2.62 - - -
36750 0.49 1.14 2.16 2.71 - -
31500 0.36 0.84 1.59 1.99 2.36 2.87
28000 0.28 0.66 1.25 1.57 1.87 2.27
25000 0.22 0.53 1.00 1.25 1.49 1.81
23000 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.)
58500 1.10 1.52 2.16 2.73
54000 0.93 1.28 1.83 2.33
45500 0.64 0.89 1.28 1.64 2.14
42000 0.54 0.75 1.09 1.40 1.83
38000 0.44 0.60 0.88 1.14 1.50
34000 0.35 0.47 0.69 0.90 1.20
30000 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.)
47250 1.37 1.89 2.72
40500 0.99 1.35 1.97 2.54
36750 0.80 1.09 1.60 2.08 2.74
31500 0.58 0.77 1.15 1.51 2.01
28000 0.46 0.59 0.89 1.17 1.58
25000 0.37 0.45 0.69 0.92 1.24
23000 0.31 0.37 0.57 0.76 1.04
WARNING
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.
To Next Page
Loading...
