WattMaster WCC II - Manual (Page 239)

Section 5: Installation Guide
WCC II Operator’s Guide
Operator Interfaces 5-37
Room Temperature Sensor
The WRS-1FVR fl ush mount or the TRS-VR wall thermostat may
be use with the TUC-VR. Both units require 4 wires from the sensor
to the TUC-VR. Use 18-22 gauge 4 conductor cable (stranded or
solid) for runs up to 100 feet. The wire should be twisted with a
minimum of 1½ turns per foot.
CAUTION: Do not install the cable in the same conduit as
power wiring. If it is necessary to install the cable in areas of
high RFI/EMI, the cable must be installed in conduit. Do not
use shielded cable of any kind.
Isolation Transformer
Each TUC-VR must be powered by its own transformer. A
24V/24V isolation transformer is provided with each TUC-VR.
CAUTION: Do not ground the secondary of the transformer.
Transformer frame must be grounded via ground wire or
conduit.
Aux, Max and Min Potentiometers
The TUC-VR also has 3 potentiometers labeled “AUX,” “MAX,”
AND “MIN.” The AUX potentiometer provides the “LOCAL SET
SETPOINT” for different items, depending on the position of the
function switches as shown below:
VAV Box Aux Set Point
1. Cooling Only MWU
2. Staged Reheat Reheat
3. Time Prop. Reheat Reheat
4. Prop Reheat Valve Reheat
Parallel Fan Box
5. Cooling Only Fan
6. Staged Reheat Fan
7. Time Prop. Reheat Fan
8. Prop. Reheat Valve Fan
Series Fan Box
9. Cooling Only Reheat
10. Staged Reheat Reheat
11. Time Prop. Reheat Reheat
12. Prop. Reheat Valve Reheat
The MAX potentiometer is adjusted for the maximum air fl ow
allowed through the terminal unit. The MIN potentiometer is
adjusted for the minimum air fl ow allowed through the terminal
unit.