8
MODGAS-XWR2 Technical Guide
STAND-ALONE WIRING
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S)
This configuration is used to control one modulating valve, which
must be placed on Gas Valve 1 (attached to Heat 1 (RLY3)).
If using an MHGRV-X along with the MODGAS-XWR2 in
Stand-Alone Mode, the SAT Sensor always attaches to the
MODGAS-XWR2.
Fan Enable
Low Speed Fan
Connect SAT Input
to Reheat Board’s SAT
Input if applicable.
Modulating
Gas Valve 1
Proof of Ignition
Signal 1 (24 VAC)
Heat Valve 1
-
0-10VDC
External
Reset Signal
Check your Fan Relay Wiring (RLY1)
Schematic for proper wiring.
Fixed Heat Stage 2
Fixed Heat Stage 3
Fixed Heat Stage 4
ALARM
UP
DOWN
ENTER
MENU
MODGAS-XWR2
AAON P/N: ASM01695
LABEL P/N:
G041530
E-BUS
DUAL
I2C
CONNECT
+24
VA
C
GND
@ 24 VAC
1 AMP MAX
CONTACT
RATING IS
COMMON
RELAY
OUTPUTS
GAS VALVE
TERMINALS
GAS
VA
LVE
1
GAS
VA
LVE
2
INPUT TERMINALS (TYPE)
HEAT ENABLE (BI)
AUX. (BI)
GND
RESET IN (AI)
SAT IN (AI)
GND (AI)
GND
AUX. (AI)
www.aaon.com
LOW SPEED
HEAT 1
HEAT 2
HEAT 3
HEAT 4
PROOF OF IGNITION 1
PROOF OF IGNITION 2
FAN
See SAT OPTIONS Tables for Jumper Settings.
Only one Supply Air Temperature Sensor can be
used per application.
Notes:
1. 24 VAC must be connected so that all ground wires
remain common.
2. All wiring to be in accordance with local and national
electrical codes and specifications.
E-BUS cable can connect to
12 Relay E-BUS Expansion Port
GV1
CR1
CR2
H1
Line
40 VA
transformer
minimum
Supply Air
Temperature
Sensor
Mount in unit
supply air duct
Heat Enable
Signal (24 VAC)
W1
GND
18-30
VAC
Figure 2: Stand-Alone Wiring - One Modulating Valve, One Ignitor, One Stage
NOTE:
Up to three additional fixed heat stages can be
configured by using Heat 2 (RLY4), Heat 3
(RLY5) and Heat 4 (RLY6). Up to 12 additional
fixed stages can be added by using the 12 Relay
E-BUS Expansion Module. (
Figure 8, page 14
).
