24
2
General venting
Installation & Service Manual
WARNING
Outdoor models MUST be installed
outdoors and MUST use the vent cap
supplied by the manufacturer. Personal
injury or product damage may result if
any other cap is used or if an outdoor
model is used indoors. All covers, doors
and jacket panels must be properly
installed to ensure proper operation
and prevent hazardous condition.
CAUTION
Appliances which are shut down or
will not operate may experience
freezing due to convective air flow in
the outdoor vent cap installed on the
appliance. In cold climates, continuous
pump operation or pump delay is
recommended to help prevent freezing
of water on outdoor systems. Proper
freeze protection must be provided. See
Freeze Protection.
Outdoor Vent/Air Inlet Location
Keep venting areas free of obstructions. Keep area clean
and free of combustible and flammable materials. Maintain
a minimum clearance of 3" (76 mm) from the rear of the
outdoor vent cap to combustible surfaces and a minimum
clearance of 1" (25 mm) from the back of the unit. To avoid
a blocked air inlet or blocked flue condition, keep the air
inlet, flue outlet and drain slot clear of snow, ice, leaves,
debris, etc.
Do not locate appliance so that high winds can deflect off of
adjacent walls, buildings or shrubbery causing recirculation.
Recirculation of flue products may cause operational
problems, bad combustion or damage to controls. Locate
appliance at least 3 feet (0.91m) from any wall or vertical
surface to prevent adverse wind conditions from affecting
performance.
Multiple appliance outdoor installations require 48" (1.22m)
clearance between each vent cap.
The outdoor cap must be located 4 feet (1.22m) below and 4
feet (1.22m) horizontally from any window, door, walkway,
or gravity air intake.
The combustion air inlet of the outdoor cap must be located
at least 1 foot (0.30m) above grade and above normal snow
levels.
Locate appliance at least 10 feet (3.05m) away from any
forced air inlet.
Locate appliance at least 3 feet (0.91m) outside any
overhang.
Clearances around outdoor installations can change with
time. Do not allow the growth of trees, shrubs or other
plants to obstruct the proper operation of the outdoor vent
system.
Figure 2-19 Outdoor Kit Installed on Appliance
The Outdoor Kit
The required outdoor kit part numbers are listed by
appliance size. The venting kit must be furnished by the
manufacturer in accordance with CSA International and
ANSI requirements. Each kit includes the outdoor vent
cap / top assembly, gas valve cover assembly, deflectors, and
weatherproof junction box assembly.
TABLE 2E
OUTDOOR KITS
Input
Btu/hr
Outdoor Kit w/
Pump Cover
Outdoor Kit
without
Pump Cover
150,000
ODK3062
ODK3069
199,999
ODK3063
ODK3070
250,000
ODK3067
ODK3071
300,000
ODK3068
ODK3072
CAUTION
Appliances which are shut down or will
not operate may experience freezing due
to convective air flow in the outdoor vent
cap installed on the appliance. In cold
climates, continuous pump operation
or pump delay is recommended to help
prevent freezing of water on outdoor
systems. Proper freeze protection must
be provided. See Freeze Protection.
Do not install in locations where rain from building runoff
drains will spill onto the appliance.
Flue gas condensate can freeze on exterior walls or on the
vent cap. Frozen condensate on the vent cap can result in
a blocked flue condition. Some discoloration to exterior
building or appliance surfaces can be expected. Adjacent
brick or masonry surfaces should be protected with a rust
resistant sheet metal plate.
Содержание Efficiency-Pac EW 150 -- 300
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