TM 9-4520-271-14
0004 00
ASH CONTROL PANEL AND ASH FRONT SIDE CONTROLS AND INDICATORS
Continued
Table 1. ASH Control Panel and ASH Front Side Controls and Indicators.
CONTROL OR
KEY
INDICATOR
FUNCTION
1
Fresh air damper assembly
Allows fresh air to enter circulating airflow system when open.
2
HOURMETER
Indicates total number of hours burner has been operated.
(total time (TT))
3
Remote lockout
Prevents inadvertent selection of AUTO MODE.
4
MODE SWITCH
Places ASH in VENT, COOL DOWN, HEAT, or OFF mode.
MANUAL MODE
Places ASH in COOL DOWN or REMOTE CONTROL mode.
AUTO MODE
5
POWER indicator
Lights when power is connected and MODE SWITCH is set to any mode
other than OFF.
6
HIGH TEMP indicator
Lights when ASH discharge air temperature exceeds limit of temperature limit
switch setting.
7
FLAME OUT indicator
Lights when burner flameout occurs.
8
Fuel pressure gage
Indicates fuel system pressure.
9
CARBON MONOXIDE
ALARMS
Lights when carbon monoxide is detected in circulating airflow system.
LIGHT
10
FLAME RESET switch
Resets combustion control relay K1.
11
PURGE SWITCH
Purges air from fuel system.
12
CARBON MONOXIDE
ALARMS
Emits audible alarm when carbon monoxide is detected in circulating airflow
ALARM
system.
13
CONTROLS CIRCUIT
Trips when overcurrent condition exists within ASH control circuitry. Must
BREAKER
be manually reset to up position.
14
POWER CIRCUIT BREAKER
Trips to protect main power circuits within ASH during overcurrent condition.
Must be manually reset by pressing button.
15
Test/silence button
Tests or resets carbon monoxide detector alarms.
0004 00-3
