AAON MODGAS-XWR2 User Manual

9
MODGAS-XWR2 Technical Guide
STAND-ALONE WIRING
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S)
This conguration is used to control two modulating gas valves.
The rst valve is modulating stage 1 (Gas Valve 1) and the
second valve is modulating stage 2 (Gas Valve 2).The rst valve
is attached to Heat 1 (RLY3) and the second valve is attached
to Heat 2 (RLY4).
If using an MHGRV-X along with the MODGAS-XWR2 in
Stand-Alone Mode, the SAT Sensor always attaches to the
MODGAS-XWR2.
Figure 3: Stand-Alone Wiring - Two Modulating Valves, Two Ignitors, Two Stages
NOTE: Up to two additional xed heat stages can be
congured by using Heat 3 (RLY5) and Heat 4
(RLY6). Up to 12 additional xed stages can be
added by using the 12 Relay E-BUS Expansion
Module. (Figure 8, page 14).
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.
Heat Valve 2
Fixed Heat Stage 3
Fixed Heat Stage 4
ALARM
UP
DOWN
ENTERMENU
MODGAS-XWR2
AAON P/N:ASM01695
LABEL P/N:
G041530
E-BUS
DUAL
I2C
CONNECT
+24 VAC
GND
@ 24 VAC
1 AMP MAX
CONTACT
RATING IS
COMMON
RELAY
OUTPUTS
GAS VALVE
TERMINALS
GAS
VALVE 1
GAS
VALVE 2
INPUT TERMINALS (TYPE)
HEAT ENABLE (BI)
AUX. (BI)
GND
RESET IN (AI)
SAT IN (AI)
GND (AI)
GND
AUX. (AI)
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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 a
secondary MODGAS-XWR2 or to a
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
H2
Modulating
Gas Valve 2
Proof of Ignition
Signal 2 (24 VAC)
GV2

AAON MODGAS-XWR2 Specifications

General

Brand	AAON
Model	MODGAS-XWR2
Category	Controller
Language	English