10
INSTALLATION INSTRUCTIONS
and the end of the pipe sealed with a female cap. If
the testing is to be undertaken at a test pressure less
than 1/2 psig (3.5 kPa), the gas supply manual shut-off
valve must be closed. For purposes of adjustement,
the minimum inlet pressure should be one (1) inch
water column above the operating manifold pressure. If
manifold pressure is tested at the outlet pressure tap of
the gas control, results should show 4” w.c.
-+
0,3” w.c..
A high altitude orifice
MUST BE
installed for water
heaters operating above 2,000 feet (609.6 m) of
altitude. Failure to follow this instruction can result
in property damage, personal injury, or death.
Installation Instructions for Water Heaters Approved
for Space Heating & Potable Water Heating
A water heater cannot be used for space heating
only. When using a water heater for space and
potable water heating, the instructions provided in
this manual 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
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°F
(60°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 premature
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 requirements.
Note: It is good practice to oversize the water heater,
to ensure that all of the potential hot water require-
ments are available. Always refer to local plumbing
codes for proper installation.
Check Valve Circulation Pump
Cold water supply to water heater
Hot water
to house
Air handler
Water heater
Clapet de retenue
Entrée d’eau pour
le circuit de chauffage
Pompe circulatrice
Entrée d’eau froide vers le chauffe-eau
Eau chaude
vers la maison
Sortie d’eau
pour le circuit
de chauffage
Échangeur d’air
Chauffe-eau
Outlet to the space
heating circuit
Inlet from
the space heating
circuit
