AAON MODGAS-XWR User Manual

MODGAS-XWR2 Technical Guide
LCD DISPLAY SCREENS
27
Conguration Screens
Refer to the following map when navigating through the Conguration
Screens. From the CONFIG Screen, press
<ENTER> to scroll through
the screens and change setpoints. Use the <UP> and <DOWN> arrow
keys to change your selections. Press
<ENTER> to save any changes.
CONFIG
S/A MODE
AUTO or FORCED
STAND ALONE MODE
Auto or Forced. Default is Auto.
In order for the MODGAS-XWR2 to communicate with another
MODGAS-XWR2 or 12 Relay Expansion board, the MODGAS-XWR2
must be put in Forced Stand-Alone Mode.
STAGES
TOTAL 1 TO 19
NUMBER OF TOTAL STAGES
Range is 1 to 19. Default is 2.
Conguration Screens
OPRATION
NORMAL OR
MASTER
OPERATION MODE
Normal or Master. Default is Normal.
This screen is used to set a Primary MODGAS-XWR2 board as a
Master board. If only using one MODGAS-XWR2 board,
this should be set to Normal.
MODULATION
CONFIGURATION
MODULATION CONFIGURATION
Values are in the format xVyIGNzS, where x is the number of valves
(V), y is the number of ignitors (IGN) and z is the number of stages (S).
Values are 1V1IGN1S, 2V2IGN2S, 2V1IGN1S,
and 2V2IGN1S. Default is 1V1IGN1S.
The four congurations are explained in detail as follows:
1V1IGN1S: Valve conguration used to control one modulating gas
valve, which must be placed on the gas valve 1 header (attached to Heat
1 Relay). Additional stages may be added to Heat Relays 2, 3 & 4, or o󰀨
board if in a communication mode.
2V1IGN1S: Valve conguration used to control two modulating gas
valves (one on each header), in which the rst and second valves operate
together for one modulating stage. Both valves are connected to Heat 1
Relay, therefore, an additional xed stage may be added on board at the
Heat 2 Relay. Additional stages may be added on Heat Relays 3 & 4 or
o󰀨 board for this conguration if it is in a communicating mode. NOTE:
Since both valves are attached to Heat 1 Relay, only one proof of ame
is required for both valves.
2V2IGN1S: Valve conguration used to control two modulating gas valves
(one on each header), in which the rst and second valves operate together
for one modulating stage. One valve is connected to Heat 1 Relay and
the second valve is connected to Heat 2 Relay. Additional stages may be
added to Heat Relays 3 & 4 or o󰀨 board if it is in a communicating mode.
2V2IGN2S: Valve conguration used to control two modulating gas valves
(one on each header), in which the rst valve is modulating stage 1 (valve
1 header) and the second valve is modulating stage 2 (valve 2 header).
Additional stages may be added to Heat 3 & 4 Relays or o󰀨 board if it is
in a communicating mode.
ADDRESS
1(138)
CURRENT BOARD ADDRESS
The rst number is the board address.
The number in parentheses is the E-BUS address.
Use this screen to set the Address for a Slave board.
Set the Address to 2 for a Slave board. Default is 1(138).

AAON MODGAS-XWR Specifications

General

Brand	AAON
Model	MODGAS-XWR
Category	Controller
Language	English