Orion System MHGRV II - Manual (Page 6)

Technical Guide
MHGRVII Controller 6
Controller Installation & Wiring
V1
K1
V2
K2
V3
K3 K4
V4
YS101894 REV 1
HOT GAS REHEAT
SERIAL #
R2 R17
R23 FA
N
COMP VA
LV
E
AUX
U5
CX5
STEP
C2
C4
R9
R8
R7
R13
R5
R6
D4
D3
R4
D2
PU
R12
D6
R11
R1
D5
R3
R3
R20
R19
R18
L1
D1
16 16
F
RESET LIMIT
O F
4 4
2 2
1 1
8 8
64 64
32 32
128 128
ADD
SETPOINT
ADD
F O F
R40
R39
ST
A
TUS
POWER
VA
LV
E
AUX FA
N
COMP
COM
TB5
SW1 SW2
U1
0-10V 4-20MA THERM
AUX
IN
SETUP
C15
PJ1
+VDC
GND
GND
AUX IN
RST IN
HTG OVR
CLG OVR
GND
SAT
RHT EN
T
SHLD
R
TB3
COMM
VR1
RV
1
C13
R31
D1
D11
C3
U2
V5
C8
L2
C12
C1
+24VAC
GND
TB4
R38
R2
D1
WDOG
CX6 U6
U1
CX1
C3
R1
U2
1
EPROM
CX2
RAM
U5
C2 P1
C4
YS101818 552
PROCESSOR
BOARD
C1
X1
CX5
U3
U4
CX4
CX3
I
C
OUT
2
IC
IN
2
RAM Chip
EPROM Chip
Black
White
Red
Green
HGR Solenoid Valve
2 Position HGR Valve (Optional)
24 VAC
Line
GND
24V
AC
40 VA
Transformer
Minimum
Modulating
HGR Valve
C1
C2
Modular Cable
Connect To
HVAC Unit
Controller
Setpoint
DIP Switch
(Not Used
For This
Application)
Reset Limit
DIP Switch
(Not Used
For This
Application)
Supply
Air Temperature
Sensor
Mount In Supply
Air Duct
Not Required if Using
MODGAS II Controller
On HVAC Unit
Fan
“POWER” LED
“STATUS” LED
Compressor
CR/HG
CW/HW
CB/HB
CG/HR
“VALVE” Relay LED
“AUX” Relay LED
“COMP” Relay LED
“FAN” Relay LED
Black
White
Red
Green
Reheat
Modulating
HG Valve
Figure 3: MHGRV II Controller Wiring When Used In Conjunction With A HVAC Controller