Lochinvar WH 55 - 399 - Manual (Page 13)

User’s Information Manual
13
4
SMART SYSTEM control module
(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 10 second purge period on a call for heat.
IGNITION The unit has begun a 4 second 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 10 seconds 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)
Room Thermostat 1 has a call for heat.
Room Thermostat 2 has a call for heat.
Room Thermostat 3 has a call for heat.
The tank thermostat or sensor has a call for heat.
Indicates which room thermostat 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 4-2 Status Display Screen
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