intrOductiOn ................................................................................................................................................3
impOrtant safetY Warnings ................................................................................................................4-9
RISK OF EXPLOSION OR FIRE .....................................................................................................4
RISK OF ASPHYXIATION ...............................................................................................................5
RISK OF ELECTROCUTION OR ELECTRICAL SHOCK ............................................................... 6
RISK OF BURNS .............................................................................................................................8
RISK OF BURSTING .......................................................................................................................8
RISK FROM MOVING PARTS ........................................................................................................8
RISK OF BODILY INJURY ..............................................................................................................9
installatiOn ...........................................................................................................................................10-15
LOCATION AND PLACEMENT .....................................................................................................0
ELECTRICAL .................................................................................................................................0
GAS PIPING ..................................................................................................................................
WATER SUPPLY ...........................................................................................................................3
HIGH PRESSURE CONNECTION ................................................................................................3
PRE-OPERATION CHECKLIST ....................................................................................................5
preparatiOn ................................................................................................................................................16
ATTIRE ..........................................................................................................................................6
PRE-START ...................................................................................................................................6
PRE-START SAFETY INSPECTION .............................................................................................6
Operating instructiOns .........................................................................................................................18
FLUSHING THE SYSTEM ............................................................................................................8
HOT WATER OPERATION ............................................................................................................8
SHUTDOWN .................................................................................................................................8
maintenance ..........................................................................................................................................19-20
PREVENTIVE MAINTENANCE ....................................................................................................9
WINTERIZING ..........................................................................................................................9-20
maintenance cHarts ...............................................................................................................................20
trOuBlesHOOting .....................................................................................................................................21
statement Of WarrantY .........................................................................................................................22
nOtes ..............................................................................................................................................................23
natiOnal cOdes:
ansi Z223.1 (nfpa nO. 54) natiOnal fuel gas cOde.
nfpa nO. 70 (nec) natiOnal electrical cOde.
csa B149.1 gas installatiOn cOde.
csa c22.1 canadian electrical cOde part 1.
2
taBle Of cOntents
Warning: This product contains lead, a
chemical known to the State of California
to cause birth defects or other reproductive
harm.
Wash your hands after handling this product.
HGM-SERIES Hot Water Heater module Operator's Manual