Heatmaster MF Series Operation And Maintenance Manual page 10

At least one pump must be circulating at all times or the
water in the furnace may boil. A continuous pump is also
useful for freeze protection in temperatures below 32
degrees F.
It is important to calculate the BTU's needed, line size,
size circulating pump is needed. Undersized lines or long
The best place to mount the main pump is on the supply
outlet. Placing the pump inside the building can lead to
cavitation and air-lock problems.
Building Connections
A hole large enough to accommodate the water lines,
insulation and PVC piping is important. Attention
sealing this point with a weather proof insulation on
both sides is also important.
Interior Connections
You may require either a water-to-water (tube and shell
or plate) or a water-to-air exchanger (rad) to transfer heat
energy from the hot water your furnace has produced.
Your plumber or dealer can design and install a system to
IMPORTANT: It is recommended to always have a back
up heating system installed in case of disruption in the
outdoor furnace heating system.
The following are examples of basic interior connections.
SteelTech Inc. carries the necessary parts for installation.
Contact us for more information!
DISCLAIMER: The following information in the interior
connections are examples and suggestions only. When
installing a furnace and its parts it is best to talk to your
To maintain pressure in an existing boiler while using an
outdoor furnace a water-to-water heat exchanger is used.
The water-to-water exchanger is installed in-line on the
return side of the existing pressurized boiler system.
Operate the (gas, oil, electric) boiler periodically to
ensure that it will operate satisfactorily when needed.
Do not relocate or bypass any of the safety controls in
the original (gas, oil, electric) boiler installation.
acceptable operation before and after installation of the
the regulatory authority.
Do not connect to any chimney or vent serving a gas
appliance.
The installation should comply with requirements of CAN/
CSA-B365, and changes to the installation should comply
Any installation of an add-on boiler shall:
be installed without interfering with the normal delivery
of heated water from the original boiler,
be installed without affecting the operation of the
electrical and mechanical safety controls of the original
boiler,
provide for a changeover from one fuel to the other
components other than the thermostats,
have provisions for preventing, or adequate water
capacity within the boiler to prevent damage from loss
of circulation due to electrical power failure,
be installed without changing the function of the
controls or rewiring the original boiler. A wiring
interconnection is permitted. The electrical system of
both boilers shall be powered from a single branch
circuit without exception.