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

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.
be present when installing the electrical portion of the
hook-up.
ee Pages 1 -1 for the furnace wiring diagrams.

FURNACE CONNECTION

Connections to the furnace are clearly marked.
Return (from the building) are the top ports, Supply (to the
building) 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

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" diameter, although 1" is most
common, 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."
are added to the system. Your main power is connected
NOTE: A supply of fresh air is necessary for combustion
and ventilation. Do not block fresh air intake located at the
back of the furnace.