23
Step 10 — Configure Unit Control Components
UNIT PROTECTION MODULE (UPM)
All units with Complete C, Deluxe D, or WSHP Open are factory
provided with a unit protection module (UPM) controls the com-
pressor and has built safeties. See Fig. 20.
Freeze Sensor
The default setting for the freeze limit trip is 30°F for applications
without anti-freeze. This can be changed to 15°F for applications
with anti-freeze by cutting the R30 resistor located on top of the
DIP switch SW1.
Fig. 20 — Unit Protection Module (UPM)
Table 6 — Low Voltage VA Draw
WARNING
To avoid possible injury or death due to electrical shock, open
the power supply disconnect switch and secure it in an open
position during installation.
CAUTION
If unit is employing a fresh water system (no anti-freeze pro-
tection), it is extremely important to have the Freeze1 R30
resistor set to 30°F in order to shut down the unit at the appro-
priate leaving-water temperature and protect your heat pump
from freezing if a freeze sensor is included.
1
2
3
4
5
6
7
9
10
11
1213
17
14
15
16
8
1 Board Power Indicator
2 UPM Status LED Indicator
3
Water Coil Freeze Protection Temperature Selection
[R30]
4 Air Coil Freeze Protection Temperature Selection
5 UPM Settings
6 Water Coil Freeze Connection
7 Air Coil Freeze Connection
8 LED Status-Diagnostic Connection
9 24VAC Power Input
10 Compressor Contact Output
11 High Pressure Switch Connection
12 Call for Compressor Y1
13 Low Pressure Switch Connection
14 24VAC Power Common
15 Condensate Overflow Sensor
16 Dry Contact
17 UPM Ground Standoff
STANDARD CONSTRUCTION HOT GAS REHEAT OR ECONOMIZER OPTIONAL COMPONENTS
Component VA Component VA Component VA
Blower Relay
(PSC Motors Only)
6-7 Total from ‘Standard’ 22-26
Monitor Relay (VA draw
per relay)
6-7
Reversing Valve
Solenoid
8-9
Additional Control
Relays
12-14
Internal 2 Way
Motorized Valve
7
Compressor Contactor 6-8
Hot Gas Reheat
Solenoid
8-9
UPM Board 2 — —
Total VA Draw 22-26 Total VA draw 42-49
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