AAON MODGAS-XWR2 - Configuration Screens

34
MODGAS-XWR2 Technical Guide
LCD SCREENS
Conguration Screens
MOD CNFG
xVyIGNzS
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
and4, 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 and 4 or o󰀨 board for this conguration if it is
in a Communications 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 and 4 or o󰀨 board if
it is in a Communications 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 and 4
Relays or o󰀨 board if it is in a Communications Mode.
STG DOWN
DLY 1
STAGE DOWN DELAY
Range is 1 to 10 minutes. Default is 1.
STG UP
DLY 1
STAGE UP DELAY
Range is 1 to 10 minutes. Default is 3.
IGN RTRY
DLY XX m
IGNITION RETRY DELAY
Range is 1-60 minutes. Default is 30
TMP SCL
FAHRENHT
TEMPERATURE SCALE
Fahrenheit (default) or Celsius.
This setting is only used in Stand-Alone Mode.
VLV STRT
POS XX%
VALVE START POSITION
Range is 55-100% in 5% increments. Default is 70%.
LOSAT SU
XX°F
LOW SUPPLY AIR TEMPERATURE START-UP
Range is 0ºF-45ºF. Default is 40ºF
If the Supply Air Temperature is less than the dened value, the
stage up delay is reduced from three minutes to one minute.
St@MinDb
XXº
MIN MODE DEADBAND
Range: 0-30 degrees.
NOTE: If it is set to 0, Min Mode will not initialize and the sequence
will continue to Heating Mode.
MinPosTP
XXXs
MIN MODE RUN TIME
Range: 0-500 seconds.