Furnace Connections - Heatmaster G100 Operation And Maintenance Manual

All wiring must conform to local codes. Use an electrical wire rated and approved for
underground installations. This wiring can be placed in the same trench below the
water lines. A qualified technician must perform the electrical portion of the installa-
tion.
See Page 22 for the furnace wiring diagram.
Hydronic lines (hot water heating lines) whenever buried or encased in cement should
not be spliced. Take the necessary steps to ensure they stay dry. This ensures that
minimal heat loss occurs. Supply and return lines should be a minimum of ¾" diameter
and have a rating of 100 PSI capacity at 180 degrees Fahrenheit. This pipe should be
listed for potable water.
Hint: Mark your feed and return lines prior to covering and allow enough pipe above
Hint:
ground at both ends for a relaxed connection. Red lines are generally "hot" while blue
are usually "cold".
Connections to the furnace are clearly marked. Return (from the house) are the top
ports, Supply (to the house) are the bottom ports. The installation of isolation valves at
both ends of the pump is recommended as well as a valve at the return line. This will
allow you to shut off water supply if repairs or additional heating components are added
to the system. Your main power is connected to the junction box at the back of furnace
and should be connected by a qualified technician.
CHIMNEY
DRAFT INDUCER
FAN
LEAD IN POWER BOX
FURNACE
DRAIN VALVE
www.heatmasterss.com
WIRING
WIRING
UNDERGROUND HYDRONIC LINES
UNDERGROUND HYDRONIC LINES
FURNACE CONNECTION
FURNACE CONNECTION
G Series Outdoor Furnaces
HEAT EXCHANGE TUBE
ACCESS COVER
PUMP PLUG IN AND
MAIN POWER SWITCH
HEAT EXCHANGE
TUBE CLEAN OUT
LEVER
RETURN LINE (BLUE)
CIRCULATION PUMP
SUPPLY LINE (RED)
UNDERGROUND PIPE
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