10
INSTALLATION INSTRUCTIONS
Installation Instructions for Water Heaters
Approved for Space Heating &
Potable Water Heating
When using a water heater for space and potable
water heating, the instructions provided in this man-
ual and with the air-handling unit must be respected
and, in particular the following:
1) All piping and components that are used in the
system must be of a nonferrous type suitable for
potable water. This also applies to any sealant
used.
2) When used as a dual purpose water heater, it
must not be connected to any system that has
been previously used for non potable water heat-
ing. This includes any piping because, in all proba-
bility, existing piping would have been, in the past,
treated with chemicals for cleaning or sealing the
system.
3) If this water heater is to be used for space heat-
ing, make sure that all safety codes are respected.
Pay special attention to safety valve pressure and
expansion tanks.
4) Do not use toxic chemicals to clean the potable
water heating system.
5) Where water temperature in excess of 140
o
F
(60
o
C) is required for a space heating application,
a mixing valve must be installed in the potable
side of the system. This will temper the water, and
reduce the risk of scalding.
6) If the incoming water line to the heater is equipped
with a check valve, water meter, or pressure-reduc-
ing valve, an expansion tank must be installed in
the system. This will prevent weeping from the
water heater relief valve and premature failure of
the heater due to expansion of the water during
the heating cycle.
7) Before acquisition of a water heater for space heat-
ing application, it is necessary to have the area of
intended use sized by a qualified technician. This
will ensure that an adequate water heating capac-
ity will be available for both heating and potable
water supply, and that the application will meet all
local codes and public utility requirements.
Note:
It is good practice to oversize the water heater,
to ensure that all of the potential hot water
requirements are available.
Check Valve
Circulation Pump
Cold water supply
to water heater
Hot water
to house
Air handler
Water heater
Soupape d’arrêt
Pompe de circulation
Entrée d’eau froide
vers le chauffe-eau
Eau chaude
vers la maison
Échangeur d’air
Chauffe-eau
