Hydronic Heating Boilers and Domestic Water Heaters Installation and Service Manual

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" (76mm) to combustible surfaces and a minimum
of 3" (76mm) clearance to the air inlet. 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 install outdoor models directly on the ground. You must
install the outdoor unit on a concrete, brick, block, or other
non-combustible pad.
Do not locate unit 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 unit
at least 3 feet (0.91m) from any wall or vertical surface to
prevent wind conditions from affecting performance.
Multiple outdoor unit installations require 48" (1.22m)
clearance between each vent cap. Locate the outdoor cap at
least 48" (1.22m) below and 48" (1.22m) horizontally from
any window, door, walkway or gravity air intake.
Locate the unit at least 10 feet (3.05m) away from any forced
air inlet.
Locate the unit 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.
Do not install in locations where rain from building runoff
drains will spill onto the unit.
TABLE-C
Input Kit* Kit*
Btu/hr w/ Pump without
Cover Pump Cover
495,000 ODK3023 ODK3014
645,000 ODK3024 ODK3015
745,000 ODK3024 ODK3015
985,000 ODK3046 ODK3043
1,255,000 ODK3047 ODK3044
1,435,000 ODK3047 ODK3044
1,795,000 ODK3048 ODK3045
2,065,000 ODK3048 ODK3045
* These kits include an outdoor vent cap, air inlet hood(s), and gasket.
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 unit
surfaces can be expected. Adjacent brick or masonry surfaces
should be protected with a rust resistant sheet metal plate.
The Outdoor Vent Kit
The optional outdoor vent kit is available from the appliance
manufacturer. The outdoor kit part numbers are listed by unit
size. See TABLE-D for kit numbers.
You can install the outdoor vent cap and combustion air inlet
panel(s) on the unit (see Figures 15 and 16).
Figure 15 - Outdoor Vent Cap Installed on
495,000 - 1,435,000 Btu/hr Models
Figure 16 - Outdoor Vent Cap Installed on 1,795,000 and
2,065,000 Btu/hr Models
Installation and
Service Manual
15
TABLE - D
Outdoor Vent Kits