Giant PV1 - Water and Gas Connections Procedures

13
INSTALLATION INSTRUCTIONS
Installation Instructions for Water Heaters
Approved for Space Heating and
Potable Water Heating (see Figure 13)
When using a water heater for space and pota-
ble water heating, the instructions provided in this
manual and with the air-handling unit must be respect-
ed 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 previ-
ously used for non-potable water heating. This includes
any piping because, in all probability, 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 heating,
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-reducing valve, an expansion tank
must be installed in the system. This will prevent
weeping from the water heater relief valve and pre-
mature failure of the heater due to expansion of the
water during the heating cycle.
7) Before acquisition of a water heater for space
heating application, it is necessary to have
the area of intended use sized by a qualified
technician. This will ensure that an adequate water
heating capacity will be available for both heating
and potable water supply and that the application
will meet all local codes and public utility require-
ments.
Note: It is good practice to oversize the water heater,
to ensure that all of the potential hot water require-
ments 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
Figure 13