Lochinvar Wall Mount Boiler WH 55-399 - Manual (Page 71)

71
Installation & Operation Manual
11
Operating information
(continued)
Status Display Screens
Section Display Description
A
(Boiler Status
Bar)
STANDBY
The unit has not received a call for heat from a remote thermostat nor
has it received a call for heat from a DHW thermostat.
START The unit has begun a burn cycle and is checking all safety circuits.
PREPURGE The unit has initiated a prepurge period on a call for heat.
IGNITION The unit has begun a spark period to ignite the main burner.
The unit has fired and is running at the displayed percentage.
POSTPURGE
The call for heat has been satisfied and the unit runs the fan for an
additional postpurge period to clear the combustion chamber and
vent system of residual flue products.
SHUTDOWN The unit has been placed in the OFF position.
SETPOINT MET The controlled temperature has exceeded its set point and its offset.
BLOCKED
The unit has detected a condition that has temporarily interrupted
the current call for heat.
B
(Call for Heat
Indicators)
Heat/Loop Demand 1 has a call for heat.
Heat/Loop Demand 2 has a call for heat.
Heat/Loop Demand 3 has a call for heat.
The tank thermostat or sensor has a call for heat.
Indicates which heat/loop demand shows priority.
The unit is being controlled by a 0 - 10V BMS signal.
The member unit is supplying heat while in Cascade Mode.
A
C
D
B
F
E
(BOILER
STATUS)
(OPERATIONAL
INFORMATION)
(LEFT SELECT
KEY)
(RIGHT SELECT KEY)
(NAVIGATION DIAL)
(CALL FOR
HEAT)
Figure 11-2 Status Display Screen
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