7
Retrofitting
When replacing a different brand of heater for an AUTOTERM FLOW heater, be sure
to first check the following things:
Diameter of the exhaust pipe.
The FLOW-5D and FLOW-5B have an exhaust pipe with an internal diameter of 24mm,
and the FLOW-14D has an exhaust pipe with an internal diameter of 38mm.
Some brands use exhaust pipes with different diameters. If so, it needs to be adjusted to
a diameter suitable for the heater in use. Larger diameters can be used if needed. (see
“Section 3.4”
, for more information on installing the exhaust pipe).
Disregarding these instructions can lead to an insufficient output of exhaust
gases due to backpressure, thus damaging the heater.
Fuel system.
When retrofitting a heater, all old fuel pipes and fuel pumps must be completely
removed, and a suitable fuel system for the AUTOTERM FLOW heater must be installed
in its place.
Different brands of fuel pumps may have different fuel outputs, and their fuel pipes may
have a different diameter. (see
“Section 3.5”
, for more information on installing the fuel
system).
Disregarding these instructions can cause fuel to overflow in the heater, or
lead to an insufficient flow of fuel, thus damaging the heater.
Electrical wiring.
All old wiring, electrical connections, control panels, etc. must be removed and installed
with new AUTOTERM FLOW components. (see “Section 3.9”, for more information on
installing the wiring of the heater).
Electrical related faults are common when using different and unsuitable
electrical components.
Coolant system.
When retrofitting a heater, all old coolant pipes and water pumps must be completely
removed, and a suitable coolant system for the AUTOTERM FLOW heater must be
installed in its place.
Different brands of circulation pumps may have different liquid output and coolant pipes
may have a different diameter. (see
“Section 3.2”
, for more information on installing the
coolant system).
Disregarding these instructions can cause the heater to overheat, thus
damaging it.