OMEGA-VSHP.G-IOM-2205
11
8. CONTROLS
MICROPROCESSOR CONTROLLER
DIP Switch Settings (BLU Board Only)
Controller DIP switch contains 10 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 10 settings:
DIP 1= Set thermostat type used. Default is HeatPump
DIP 2 = Hybrid or Heat Pump Unit
DIP 3= Variable Flow (Control Valve Powered on Call for Com-
pressor; Constant Flow (Control Valve Always Powered to
Open Position)
DIP 4= Control Valve NO or NC (NC is default)
DIP 5= Reversing Energized to Heating or Cooling (Energized
to Cooling is default)
DIP 6= Fan speed control: 3-Speed slider switch (OFF/Manual);
or Thermostat (ON/Auto).
DIP 7= Condensate Overflow Switch - Enabled or Disabled.
DIP 8= Condensate Type switch used. Normally Open or Close.
Factory default is NO.
DIP 9= Spare. Not used unless custom configured.
DIP 10= ON or OFF monitoring of EWT & LWT sensors for
alarms. Factory default is OFF.
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:
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: “O/B” (0V) = Reversing Valve De-Energized
Cooling: “O/B” (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:
Thermostat Cable
Field wire thermostat cable pigtail to the control board
terminal blocks. A minimum 4-wire thermostat cable is
required for single fan speed thermostats where com-
mon wire is not required. A 5-wire cable is recommend-
ed for most modern thermostats.
Ensure thermostat provides 24V power to G (fan) termi-
nal during call for heating or cooling.
Fan Control with EC Motors (ECM)
Pulse Width Modulated (PWM) signal is utilized to con-
trol fan motor speeds 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.
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.
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)
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
5
Reversing Valve
(RV)
RV Energized to Heat RV Energized to Cool
6
FanMode
Fan Manual
Fan Auto
7
Condendate
Overflow
Enabled
Disabled
8
COS Type
NC
1
NO
2
9
Spare 1
Empty
Empty
10
Spare 2
Sensors Off
Sensors ON
NO = Normally Open and NC = Normall Closed
1) Condensate Alarm on Open - 2-wire Float Switch
2) Condensate Alarm on Close - 1-wire Electronic Switch