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OMEGA-VSHP.G-IOM-2103
10
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
Heat Pump Thermostat
When using Heat Pump Thermostat (recommended
setting) set DIP #1 to the “ON” position. See table below
for connecting thermostat to unit terminal blocks:
Table 4: Heat Pump Thermostat Connections
When setting thermostat to HEAT PUMP mode check
the following:
“G” Terminal Close (24V) = call for fan
“Y” Terminal Closed (24V) = call for compressor
Heating Mode: “O/B” Terminal Open (0V) = Reversing
Valve De-Energized
Cooling Mode: “O/B” Terminal Closed (24V) = Reversing
Valve Energized
Heat/Cool Thermostat - Requires Power to G (Fan)
Ensure thermostat provides 24V power to G (fan) termi-
nal during call for heating or cooling. When using HEAT/
COOL thermostat set DIP #1 set to the “OFF” position.
See table below for connecting thermostat to unit termi-
nal blocks:
Table 5: Heat/Cool Thermostat Connections
Fan Control with EC Motors (ECM)
PULSE WIDTH MODULATED (PWM) signal is utilized
to control motor speed between 0 and 100% of full
speed. The controller has been programmed to use 3
pre-programmed speeds for Low, Medium and High.
With optional Whisper Mode when there is a no request
for cooling or heating, unit will operate in ‘Whisper Mode’
for ultra low fan speed air circulation.
Thermostat Cable
Units come with a 24 inch long standard 6-wire thermo-
stat cable pigtail factory wired to the control board termi-
nal blocks. A minimum 4-wire thermostat cable is re-
quired for single fan speed thermostats where common
wire is not required.
Ensure thermostat provides 24V power to G (fan) termi-
nal during call for heating or cooling.
Fan Speed Set by Thermostat
Wire thermostat wire to required fan speed terminal and
set DIP Switch #6 on the board to (ON) Auto. Fan speed
will be determined by wiring to the G1,G2, or G3 termi-
nals:
G1 Signal = LOW fan speed enabled.
G2 Signal = MEDIUM fan speed enabled.
G3 Signal = HIGH fan speed enabled.
Manual Fan Speed Control - 3-Speed Selector Switch
Enable the unit mounted 3-speed selector switch by
setting DIP Switch #6 to OFF (Manual). Run fan wire
from thermostat to any of the G1, G2, G3 terminals. Fan
speed will be determined by the position of the unit
mounted 3-speed fan selector switch:
L = LOW fan speed
M = MEDIUM fan speed
H = HIGH fan speed
(not available with Whisper Mode)
DIP
DESCRIPTION
OFF
ON
1
Tstat Type
Heat/Cool Tstat
HeatPump Tstat
2
HP Type
Hybrid HP
Std Heat Pump
3
FlowType
Variable Flow
Constant Flow
4
Coax Valve
Coax Valve NO
Coax Valve NC
HeatCoil Valve NO
Heat Coil Valve NC
RV Energized to Heat
RV Energized to Cool
6
FanMode
Fan Manual
Fan Auto
NO = Normally Open and NC = Normall Closed
5
Reversing Valve
(RV)/ HeatCoil
DIP 1 (ON) = HeatPump Thermostat
TERMINAL
BLOCK
WIRE
DESCRIPTION
TB1 #4
R
24VAC – Line (R)
TB1 #3
G1
Fan Speed 1 - Low Speed
TB1 #2
G2
Fan Speed 2 - Medium Speed
TB1 #1
G3
Fan Speed 3 - High Speed
TB2 #3
Y
Call for Compressor
TB2 #2
O/B
Call for Reversing Valve
TB2 #1
C
Common (Optional)
DIP 1 (OFF) = HEAT/COOL Thermostat
TERMINAL
BLOCK
WIRE
DESCRIPTION
TB1-4
R
24VAC – Line – (R)
TB1-3
G1
Fan Speed 1 - Low Speed
TB1-2
G2
Fan Speed 2 - Medium Speed
TB1-1
G3
Fan Speed 3 - High Speed
TB2-3
Y
Call for Cooling
TB2-2
O/B
Call for Heating
TB2-1
C
Common (Optional)