Part number 550-143-010/1021
90
GV90+
series
2
gas-fired water boiler – boiler manual
Installation and service certificate
Boiler model _____________ Series ______ Consumer Protection (CP )number ___________ Date installed _______________
Measured Btuh input ____________
Installer ________________________ ________________________________ ______________________________
(company) (address) (phone)
_______________________________
(installer’s signature)
Installation instructions have been followed.
Check-out sequence has been performed.
Above information is certified to be correct.
Information received and left with owner/maintenance person.
CHART 8
Troubleshooting LWCO and POWER light Solid
and/or “LCO” shown on display
Electrical shock hazard
— Wherever you see TURN OFF POWER, follow the instructions. Failure to fol
-
low instructions could result in severe personal injury, death or substantial property damage.
Troubleshooting
(continued)
Is boiler pressurized?
Yes
No
•
System was low on water.
•
Check system fill piping for
leaks or damage.
•
System is losing
water.
•
Repair leak and retest.
•
Pressurize boiler to system design pressure.
IS light still solid?
No
Yes
•
Check system for leaks.
Is system leaking or not
maintaining pressure?
No
Yes
•
LWCO sensor is bad or fouled.
•
Clean LWCO sensor
•
Retest.
IS light still solid?
No
Yes
•
Sensor is bad. Replace sen
-
sor.
•
Retest.
•
Sensor was fouled.
•
Check water quality and
maintenance schedule.