Wiring; Hydronic Lines; Furnace Connection - Heatmaster G100 Operation And Maintenance Manual

G Series Outdoor Furnaces

WIRING

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 installation.
See Page 28 and 29 for the furnace wiring diagram.
UNDERGROUND HYDRONIC LINES
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" inside
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 ground at both ends for a relaxed connection. Red lines are generally "hot" while
blue are usually "cold".

FURNACE CONNECTION

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 addi-
tional 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 HEAT EXCHANGE TUBE
ACCESS COVER
PUMP PLUG IN AND
MAIN POWER SWITCH
SMOKE BYPASS
LEVER
DRAFT INDUCER
FAN
HEAT EXCHANGE
TUBE CLEAN OUT
LEVER
LEAD IN POWER BOX
RETURN LINE (BLUE)
CIRCULATION PUMP
SUPPLY LINE (RED)
FURNACE
DRAIN VALVE
UNDERGROUND PIPE
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