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MODGAS-XWR2-B Technical Guide
LCD SCREENS
Status Screens
Status Screens
Refer to the following map when navigating through the Status
Screens. From the STATUS Screen, press
<ENTER>
to scroll
through the screens.
STATUS
MODE STATE
This screen displays the current mode of operation. They are as follows:
OFF_MODE:
This mode will display when there is no call for Heat and
Heating has been disabled. All relays are off, all fixed stages are off, and
the valves are moved to the home position. This is the default mode.
IGNITE_MODE:
Each time Heat is activated, the unit will first go into
Ignition Mode. During this mode, the valve moves to the start position
and Stage 1 is ignited. Once Proof of Flame (POF) is established, the unit
will go into Heat. Proof of Flame is established when the POF signal has
been present for the ignition hold time. The ignition position and proof of
flame time can both be set in the hidden configuration screen.
FORCE_MODE:
If the valves are being forced for testing, the board
moves into this mode. This mode maintains the normal heating sequence
for each modulation configuration, but instead of using the PID Loop
it uses the forced position (set from either the Force Menu or through
Modbus). After 10 minutes of no keypad input, the Force Mode will
disengage.
MOD HEAT STAGE ##:
After Ignition Mode, the unit will enter the Heat
Mode and will begin to modulate the gas valve(s) to maintain the Heating
Supply Air Setpoint. Once the call for heat goes away, the unit will leave
the Heat Mode.
SLAVE_HEATING:
If the module is secondary to another MODGAS-
XWR2 series module, then this mode replaces MOD HEAT STAGE ##
Mode. If the board is in this mode, then that means there is a MASTER
XWR2 series board running the PID Loop control. A secondary module
in this mode simply mimics the operation of the MASTER XWR2 series
board.
TEST_MODE:
If the module is being tested through Prism, the module
will move into this mode to operate (e.g. turn relays on/off).
VALVE 1
100%
VALVE 1 POSITION
0% to 100% or Closed
VALVE 2
100%
VALVE 2 POSITION
0% to 100% or Closed
SA TEMP
XX.X
SUPPLY AIR TEMPERATURE
40ºF to 150ºF or 4ºC to 65ºC.
If no sensor is detected, screen will display “NO SENSR”
ACTIV SP
XX.X
ACTIVE SUPPLY AIR SETPOINT
Calculated from SAT Setpoint and Reset Setpoint in Stand-Alone Mode.
In Communications Mode, the main controller sends the setpoint.
The SAT Setpoint is set by the LCD Display in Stand-Alone Mode and is
set by the main controller in Communications Mode.
FAN SPEED
OFF
FAN SPEED STATUS
Low, High, Off
