Domestic Hot Water - Heatmaster G Series Operation And Maintenance Manual

system of both boilers shall be powered from a single
branch circuit without exceptions.
Boiler Safety
Operate the boiler periodically to ensure that it will
—
operate satisfactorily when needed .
Do not relocate or bypass any of the safety controls in
—
the original boiler installation.
The operation of the boiler must be verified for
—
acceptable operation before and after installation of the
add-on appliance by a gas fitter who is recognized by
the regulatory authority .
Do not connect to any chimney or vent serving a gas
—
appliance .
Overhead boiler installation example
Installation should comply with requirements of CAN/
CSA-B365, and changes to the installation should comply
with CSA-B139 (for oil-fired boilers), C22.1 (for electric
boilers), or CAN/CSA B149.2 (for gas-fired boilers).

DOMESTIC HOT WATER

Flat plate exchanger systems used to pre-heat domestic
water tanks are generally more reactive to hot water
demands then tube and shell systems. However, tube
and shell exchangers hold up better when hard water is
present .
Forced Air Furnace (Water-To-Air Exchanger)
The water-to-air heat exchanger must be mounted so that
air blows through the fins (coils). The exchanger should be
mounted below the A/C coil if possible. The exchanger
should be sized to fit existing duct-work and should
produce about as many BTU's as the existing heat source.
An exchanger that produces too many BTU's will result
in uneven heat and the fan stopping too quickly while a
heat exchanger that is undersized will not produce the
necessary BTU's. The heat exchanger can also be placed
into the cold air portion of the duct-work but it is not
recommended because some furnaces have an overheat
shut off if the fan overheats as a result of blowing hot air
instead of cold air .
It is important that the warm-air supply-duct system is
constructed of metal in accordance with NFPA 90B-1993,
2-1 .1 . If the outlet-air temperature of a central furnace
exceeds 250 degrees F (121 degrees C) when it is tested
in accordance with the requirements for simultaneous
firing in 56.4.1 and 56.4.2 of the standard. It is also
important that the plenums installed to the furnaces are
constructed of metal in accordance with NFPA 90B-1993,
2-1 .3 .
Example of hookup for a forced air furnace and hot water.
G
SERIES
13