Lochinvar 51-211 manual Call for Heat

User’s Information Manual

4 SMART SYSTEM control module

Figure 4-2Status Display Screen

A

(BOILER

STATUS)

C

(OPERATIONAL

INFORMATION)

D

(LEFT SELECT

KEY)

E

B

(CALL FOR

HEAT)

F

(RIGHT SELECT KEY)

				(NAVIGATION DIAL)
			Status Display Screens
Section	Display				Description
	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.
A
		%			The unit has fired and is running at the displayed percentage.
(Boiler Status
					The call for heat has been satisfied and the unit runs the fan for an
Bar)	POSTPURGE				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.
					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.
					Room Thermostat 1 has a call for heat.
					Room Thermostat 2 has a call for heat.
B					Room Thermostat 3 has a call for heat.
(Call for Heat					The tank thermostat or sensor has a call for heat.
Indicators)
					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.

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