5
PRE- INSTALLATION
6- LOCATING COMBINATION HEATER
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Direct, sidewall venting
Give special attention to location of combi-
nation heater vent to avoid possibility of
severe personal injury, death, or substantial
property damage.
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Flue gases will form a white plume in
winter.
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Plume could obstruct favorite window
view.
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Prevailing winds could cause freezing
of condensate and water/ice build-up on
building, plants or roof.
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Excessive winds may cause nuisance
Combination Heater shutdowns when
unit is sidewall vented.
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Locate or guard the vent to prevent
accidential contact by people or pets.
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Vent must terminate at least 4 feet
below, 4 feet horizontally from any
door, window or gravity air inlet to the
building. This vent must not be less
than 7 feet above grade when located
adjacent to public walkways.
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DO NOT terminate vent into window
well, stairwell, alcove, courtyard or
other recessed area.
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DO NOT terminate vent above any door,
window or gravity air inlet. Condensate
can freeze causing ice formations.
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Terminate vent at least 6 feet from adja-
cent walls.
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Terminate vent at least 1 foot above
grade, including normal snowline.
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This combination heater is not approved
for outdoors installation. It should be
located indoors in an area with above
freezing temperatures.
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The combination heater should be located
so that any leakage from the tank or water
connections will not cause damage to the
area adjoining the combination heater or
to lower floors in the structure.
- When such a location is unavoidable
a suitable drain pan with adequate
drainage, should be placed under the
combination heater. The pan must
not restrict combustion air flow.
7- OPERATING RESTRICTIONS
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Maximum working pressure for inner
(domestic water) tank is 150 psig.
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Maximum working pressure for outer
(primary water) tank is 45 psig.
•
Maximum domestic hot water tempera-
ture is 180ºF (use only for special high-
temperature operational requirements).
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Inner tank has factory installed
Temperature & Pressure Relief Valve
with an AGA rating of 100,000 Btu/hr
for G-25 and 200,000 Btu/hr. for G-30.
•
Outer tank has a factory installed 30
psig relief valve rated at 535,000 Btu/hr
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Electrical rating:120 V, 60 Hz, less
than 12 amperes
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Single wall heat exchanger in combina-
tion heater complies with National
Standard Plumbing Code, provided that:
- Outer tank water (including addi-
tives) is practically non-toxic, hav-
ing toxicity rating or class of 1, as
listed in Clinical Toxicology of
Commercial Products,
- Outer tank pressure is limited to
maximum 30 psig by approved
relief valve.
•
pH & chloride limits for combination
heater are:
- Chloride, less than 80 mg/l.
- pH, 6-8.
NOTICE
WARNING
