Orion System MODGAS II - Manual (Page 13)

MODGAS II Controller Section 1
Overview and Wiring 1-9
NOTE:
It is possible to create a “reverse acting” control sequence by setting the
DISCHARGE SETPOINT DIP Switch to 130 °F and the RESET LIMIT DIP
Switch to 70 °F. In this case the controller will maintain a 130°F discharge
temperature when the Reset Input signal is at 0 Volts and will reduce it to 70 °F
when the Reset Input signal is at 10 Volts.
Figure 1-5: MODGAS II Controller DIP Switch Settings
DIP Switch Setting Shown
Is For A Setpoint Of 120
DIP Switch Setting Shown
Is For A Setpoint Of 130
ADD
ADD
64 + 32 + 16 + 8 = 120 128 + 2 = 130
PHILIPS
EPROM
U3
U5
RAM
CX2
1
U2
R1 C3
U4
CX3
CX4 YS101818
552 PROCESSOR
BOARD
CX5 C1
U1
R2
CX1
CX6
WDOG
U6
PHILIPS
P1
C2
C4
V1 V3
K3
V2
K2
FT
K1 TB1
DISCHARGE
SETPOINT
F F
1 1
O O F F
RESET
LIMIT
AUX COM
AUX
LO
SPD FA
N
LO SPD FAN
ADD ADD
4 4
2 2
16 16
8 8
64 64
32 32
128 128
R4
GAS
VALVE
SER. #:
VOUT D9
V5 C13
GND
TB4
POWER
YS101826PREV 1
MODULATING
GAS BOARD
PJ1
SHLD
RV1
ST
ATUS
P1
R8
RST
IN J01
AUX
IN
GND HEA
T
EN
C2
R1
R3
R1 P D2 R9
C1
SA
T
+VDC
VR1
R7 D1
R15
P
I2C
IN
TB2
R
T
V4
GND
24VAC
D8
U5
C7
R25
R26
R26
C6
POWER
TB3
All Rocker Switches Depressed
In the Direction Of The ADD Arrow
Are Added Together To Total The Setpoint
Reset Limit DIP Switch Discharge Setpoint DIP Switch
MODGAS II Controller Board
Typical DIP Switch
Detail View
F
1
O F
ADD
4
2
16
8
64
32
128