LAARS HP-M2 Series - Installation, Operation and Maintenance Instructions - Manual (Page 32)

Page 32 LAARS Heating Systems
Figure 27. Checking Blower (You Must Complete Figure 26 First).
RESET BOILER CONTROL BY
SWITCHING BOILER SWITCH OFF
FOR 15 SECS, THEN BACK ON.
REFER TO GENERAL TROUBLE
SHOOTING SECTION FIGURE 24
CONNECT MANOMETER TO "PRESSURE TAP"
ON GAS VALVE - PRESSURE DURING BLOWER
OPERATION WITHOUT GAS FLOW (VALVE
LIGHT NOT LIT) IS - 2.5 IN W.C.
CHECK FOR VOLTAGE 120 VAC
AT BLOWER WIRE CONNECTOR
(WITHIN 5 MINS. AFTER GREEN
LIGHT)
BLOWER O.K. CHECK FOR FLUE
OBSTRUCTIONS
BLOWER STARTS
YES
YES NO
YES
NO
NO
REPLACE BLOWER
0 VOLTS 120 VAC
CHECK TT, LIMITS,
STACK SWITCH
REPLACE BOILER
CONTROL 2400-224 REFER TO FIGURE 25
REFER TO FIGURE 28
OK OPEN
Р
Р Р
Р
Р
Р Р
Р Р
Р Р
WITH A CALL FOR HEAT / HOT WATER, AFTER TWO
SECONDS DOES GREEN POWER LIGHT COMES ON.
REPLACE
BLOWER CLEAR / REMOVE
OBSTRUCTION
Ð
CLEAR
OBSTRUCTED
Ð
OUT OF
PRODUCTION