Unit Start Up
RT-SVX36K-EN 149
installed over the condenser fans 2B1 & 2B4 (depending
on unit size). Refer to the illustration in Figure 59 for the
damper locations.
For field installation, mount the dampers over the
condenser fans at the locations shown in Figure 59 and
connect the actuator for each circuit. (Refer to the
Installation Instructions provided with each kit.)
Damper Adjustment (Factory or Field
Installed)
The UCM has a factory default setpoint of 90°F.This
setpoint can be adjusted using the Human Interface
programming procedures.
Inspect the damper blades for proper alignment and
operation. Dampers should be in the closed position
during the “Off” cycle. If adjustment is required;
1. Never depress the actuator clutch while the actuator is
energized.
2. At the Human Interface, program the actuator for 0%
on circuit #1 and/or circuit #2. (The output signal will go
to 0.0 VDC.)
3. Loosen the actuator clamp.
4. Firmly hold the damper blades in the closed position.
5. Retighten the actuator clamp.
To check damper operation, program the actuator for 100%
on circuit #1 and/or circuit #2. (The output signal will go to
10 VDC and the damper will drive to the full open position.
Filter Differential Pressure Gauge Adjustment
To re-zero the filter differential pressure gauge, unscrew
the front cover of the gage in a counterclockwise direction.
If it is difficult to loosen, use a small sheet of rubber placed
over the cover.The zero-adjustment screw is located
behind the scale on the lower left at the point marked
"zero". Use a small hex allen wrench and adjust the pointer
until it indicates zero. This must be done with the pressure
connections vented and the unit supply airflow off.
Electric, Steam and Hot Water Start-Up
(Constant Volume & Variable Air Volume
Systems)
1. Ensure that the “System” selection switch at the
remote panel is in the “Off” position.
2. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit's terminal
block 1TB1 or the unit mounted disconnect switch
1S14.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK
1TB1 OR UNIT DISCONNECT SWITCH 1S14.
3. Turn the 115 volt control circuit switch 1S1 and the 24
volt control circuit switch 1S70 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 appropriate programming manual for CV
or VAV applications for the SERVICETEST screens and
programming instructions.
5. Use Table 42, p. 96 to program the following system
components for operation by scrolling through the
Human Interface displays;
• Electric Heat
– Supply Fan (On)
– Variable Frequency Drive (100% Output, if
applicable)
– RTM Occ/Unocc Output (Unoccupied)
– Heat Stages1&2(On)
• Steam or Hot Water Heat
– Supply Fan (On)
– Variable Frequency Drive (100% Output, if
applicable)
– RTM Occ/Unocc Output (Unoccupied)
– Hydronic Heat Actuator (100% Open)
– Open the main steam or hot water valve supplying
the rooftop heater coils.
6. Once the configuration for the appropriate heating
system 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 theTEST START key is
pressed and the delay designated in this step has
elapsed. Press the ENTER key to confirm this choice.
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury.
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