AAON Orion VCCX2 User Manual

62
VCCX2 Controller Technical Guide
MODGAS-XWR2 Controller Wiring
The ASM01695 MODGAS-XWR2 Controller is designed to
be used with White-Rogers
®
valves only. It will modulate up to
two White-Rogers
®
gas valves to maintain a desired Discharge
(Supply) Air Temperature (up to four modulating gas valves
may be controlled when a second MODGAS-XWR2 Controller
congured as a slave module). The controller also controls the
speed of the induced draft fan to maintain proper combustion in
the heat exchanger. The controller can be used as a stand-alone
unit or be connected to the 12 Relay E-BUS Expansion Module
(stand-alone only) or VCCX2 Controller using an EBC E-BUS
cable. See Figure 43, this page.
The following information will be passed between the MODGAS-
XWR2 Controller and the VCCX2 Controller:
• Heat activation command
• Heating Discharge Setpoint
• The oset for the Supply Air Temperature Sensor
• High Limit Temperature Setpoint
• If the communication is interrupted between the
MODGAS-XWR2 Controller and the VCCX2
Controller, the MODGAS-XWR2 controller will revert
to stand-alone operation.
For more information, refer to the MODGAS-XWR2 Controller
Technical Guide.
Proof of Ignition
Signal 1 (24 VAC)
Fan Enable
Low Speed Fan
Heat Valve 1
Heat Valve 2
Fixed Heat Stage 3
Fixed Heat Stage 4
Proof of Ignition
Signal 2 (24 VAC)
Note:
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.
CR1-B
N.O.
N.O.
N.C.
CR2-1
SC
Speed
Control
Motor
Induced
Air Blower
N.O.
CR1-A
L2
L1
Connect Supply Air Temperature sensor
to AI2 (VCM-X and VCB-X) or AI3 (VCCX2)
and GND on main controller.
Mount in supply
air duct
Supply Air
Temperature
Sensor
The SAT OPTIONS jumper setting should
be set to 1. Only one Supply Air Temperature
sensor can be used per application.
Line
Voltage
40 VA
Transformer
Minimum
GND
18-30
VAC
Check your fan
relay wiring (RLY1)
schematic for proper
wiring.
EBC E-BUS cable connects to VCCX2
or VCB-X controllers expansion port
Modular cable connects to VCM-X E-BUS
controllers expansion port.
Modulating
Gas Valve 2
(Modulates with
Valve 1 as 1 stage)
Modulating
Gas Valve 1
(Modulates with
Valve 2 as 1 stage)
Figure 43: MODGAS-XWR2 Controller to VCCX2 Controller Wiring Diagram
WIRING
MODGAS-XWR2 Controller

AAON Orion VCCX2 Specifications

General

Brand	AAON
Model	Orion VCCX2
Category	Controller
Language	English