Controls; Microprocessor Controller; Dip Switch Settings; Thermostat Cable - Omega VSHP Series Installation And Operation Manual

OMEGA-VSHP.F-IOM-1907

8. CONTROLS

MICROPROCESSOR CONTROLLER

DIP Switch Settings

Controller DIP switch contains 6 switches for setting up
thermostat, Fan, and system settings. Microprocessor
DIP settings are factory set. Make changes if warranted
by site conditions. Below are the 6 settings:
Table 3: DIP Switch Settings
DIP DESCRIPTION
1 Tstat Type Heat/Cool Tstat
2 HP Type Hybrid HP
3 FlowType Variable Flow
4 Coax Valve Coax Valve NO
HeatCoil Valve NO
Reversing Valve
5
(RV)/ HeatCoil
RV Energized to Heat
6 FanMode Fan Auto
NO = Normally Open and NC = Normall Closed
Heat Pump Thermostat
Set DIP #1 to the "ON" position for Heat Pump Thermo-
stat. Refer to the following table for connecting thermo-
stat to unit terminal blocks:
Table 4: Heat Pump Thermostat Connections
DIP 1 (ON) = HeatPump Thermostat
TERMINAL
WIRE
BLOCK
TB1 #4 R
TB1 #3 G1
TB1 #2 G2 Fan Speed 2 - Medium Speed
TB1 #1 G3
TB2 #3 Y
TB2 #2 O/B
TB2 #1 C
Heat/Cool Thermostat
Set DIP #1 set to the "OFF" position for conventional
HEAT/COOL Thermostat. Refer to the following wiring
table for connecting HEAT/COOL thermostats to unit
terminal blocks:
Table 5: Heat/Cool Thermostat Connections
DIP 1 (OFF) = HEAT/COOL Thermostat
TERMINAL
WIRE
BLOCK
TB1-4 R
TB1-3 G1
TB1-2 G2 Fan Speed 2 - Medium Speed
TB1-3 G3
TB2-3 Y
TB2-2 O/B
TB2-1 C
www.omega-heatpump.com
OFF ON
HeatPump Tstat
Std Heat Pump
Constant Flow
Coax Valve NC
Heat Coil Valve NC
RV Energized to Cool
Fan Manual
DESCRIPTION
24VAC – Line (R)
Fan Speed 1 - Low Speed
Fan Speed 3 - High Speed
Call for Compressor
Call for Reversing Valve
Common
DESCRIPTION
24VAC – Line – (R)
Fan Speed 1 - Low Speed
Fan Speed 3 - High Speed
Call for Cooling
Call for Heating
Common

Thermostat Cable

Unit comes with a 24 inch long standard 6-wire thermo-
stat cable. This cable is factory wired to TB1 and TB2
terminal blocks on the controller board. Wire other end
of pigtails to thermostat. A minimum 4-wire thermostat
cable is required for single speed thermostats. A field
supplied 7-wire thermostat cable is required if 3-speed
fan control is required from a 3-speed thermostat. See
Figure 24: Thermostat Wiring Detail.
Multi Fan Speed Thermostat
If connecting thermostats with 3 speed control at the
thermostat, DIP switch #6 (FanMode) should be set to
the "ON" position. This will ignore the position of the unit
mounted fan speed selector switch. Fan speed will be
controlled by thermostat. Connect thermostat fan speed
control wiring to the G1,G2, and G3 terminals as shown
below. Fan speed is determined by the G1,G2, and G3
signals from the thermostat:
G1 Signal = LOW fan speed enabled.
G2 Signal = MEDIUM fan speed enabled.
G3 Signal = HIGH fan speed enabled.
Single Speed Thermostat
If connecting thermostats with single speed control at
the thermostat set DIP switch #6 to the "OFF" position,
In this mode thermostat can be connected to any of the
G1,G2, and G3 terminals and a "Run Fan" request from
thermostat will energize the fan to a speed determined
by the position of the unit mounted 3-speed fan selector
switch:
L = LOW fan speed
M = MEDIUM fan speed
HI = HIGH fan speed

Fan Control with PSC Motors

Fan speed for units with PSC motors is set using each of
the built-in motor speeds and are selected by either set-
ting the fan speed using the unit mounted fan speed
selector switch or a thermostat with 3-speed fan control
capability. See electrical schematic in Figure 22.
Fan Control with EC Motors (ECM)
Low voltage PULSE WIDTH MODULATED (PWM) sig-
nal is utilized to control motor speed between 0 and
100% of full speed. The controller has been pro-
grammed to use 3 preprogrammed speeds for Low, Me-
dium and High. See electrical schematic in Figure 23.

Whisper Mode (ECM Only)

Whisper mode runs fan a pre-determined low fan speed
for continuous air circulation. Field wire R1 and G1 with
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