Bryant BW9, Installation, Start-Up, And Operating Instructions Manual, Page: 35 / 52

Fig. 27—Initial Service Checks
A99349
1. IN A RESET FROM LOOKOUT CONDITION, ALL ELECTRICAL METER READINGS ARE THE
GAS CONTROL VALVE (24 VAC) MUST BE TAKEN WITHIN THE TRIAL FOR IGNITION PERIOD.
2. IF ANY COMPONENT DOES NOT FUNCTION PROPERLY, MAKE SURE IT IS CORRECTLY
INSTALLED AND WIRED BEFORE REPLACING IT.
3. STATIC ELECTRICITY DISCHARGE CAN DAMAGE THE INTEGRATED BOILER CONTROL (IBC).
TOUCH METAL SURFACE TO DISCHARGE STATIC ELECTRICITY BEFORE TOUCHING IBC.
4. THE IBC CANNOT BE REPAIRED. IF IT MALFUNCTIONS IT MUST BE REPLACED.
5. ONLY TRAINED, EXPERIENCED SERVICE TECHNICIANS SHOULD SERVICE THE IBC SYSTEMS.
FOLLOWING TROUBLESHOOTING, CHECK OUT THE SYSTEM FOLLOWING THE SEQENCE
OF OPERATION SECTION OF THIS CHAPTER FOR NORMAL LIGHT OFF SEQUENCE.
6. ALL CONTROLS ARE FACTORY TESTED AT LEAST ONCE IN THE ASSEMBLY PROCESS AND
DEFECTIVE CONTROL IS GENERALLY THE LEAST LIKELY CAUSE. IF YOU SUSPECT YOU
HAVE A DEFECTIVE CONTROL, DOUBLE CHECK YOUR PATH THROUGH THE
TROUBLESHOOTING CHART BEFORE YOU REPLACE IT.
7. IT IS ALSO IMPORTANT TO REMEMBER THAT THE LIKELIHOOD OF COMING ACROSS TWO
IDENTICAL DEFECTIVE CONTROLS IN A ROW IS ALMOST NIL. IF IT SEEMS TO BE HAPPENING,
CHANCES ARE THAT EITHER THERE IS NOTHING WRONG WITH THE CONTROL OR IT IS
BEING DAMAGED BY SOME OTHER PROBLEM (A SHORT BURNIGN OUT A TRANSFORMER,
FOR EXAMPLE).
1. BEFORE TROUBLESHOOTING
A. MAKE SURE THAT CIRCUIT BREAKER IS ON OR FUSE IS OK AT ELECTRICAL
PANEL
B. MAKE SURE THAT SERVICE SWITCH IS ON .
C. MAKE SURE THAT GAS IS ON AT THE GAS METER, AT ALL APPROPRIATE MANUAL
SHUTOFF VALVES AND AT THE GAS CONTROL VALVE.
D. MAKE SURE THAT THE THERMOSTAT IS CALLING FOR HEAT
E. CHECK THAT WIRE CONNECTORS AT THE INTEGRATED BOILER CONTROL AND
AT THE ORIGINATING CONTROL ARE SECURELY PLUGGED IN OR CONNECTED
F. CHECK THE HOSES ARE SECURELY CONNECTED AND ARE NOT PLUGGED OR
DAMAGED.
2. TROUBLE-SHOOTING TOOLS:
A. VOLTMETER TO CHECK 120 VAC AND 24 VAC.
B. CONTINUTIY TESTER
C. INCLINED MANOMETER OR PRESSURE GAUGE WITH 0 - 20” RANGE (0.01” SCALE)
FOR MEASURING SECTION PRESSURES AT PRESSURE SWITCH.
D. U-TUBE MANOMETER OR DIFFERENTIAL PRESSURE GAUGE WITH 0 - 14” RANGE
(O.1” SCALE) FOR MEASURING INLET AND MANIFOLD GAS PRESSURES.
3. WHAT IS SYSTEM STATUS?
A. CONSULT THE CHART ON THE FOLLOWING PAGE.
B. FIGURE 16 SHOWS THE LOCATION ON THE BOILER OF THE DIAGNOSTIC
INDICATOR LAMPS.
INITIAL SERVICE CHECKS
IMPORTANT
TROUBLE SHOOTING
B
FIRE, EXPLOSION OR SHOCK HAZARD MAY CAUSE
PROPERTY DAMAGE, SEVER INJURY OR DEATH.
DO NOT ATTEMPT TO MODIFY THE PHYSICAL OR
ELECTRICAL CHARACTERISTICS OF THIS
BROILER IN ANY WAY.
! ! WARNING ! !
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