Operating instructions

Part number 550-141-887/0800
8
AHE Series 4 Direct Vent Wall-Mounted Boilers — Boiler Manual
2a Venting — vent/air intake pre-installation
General information
Installations must comply with all
local, state and national codes
including National Fuel Gas Code,
ANSI Z223.1–latest edition.
Canadian installations must comply
with B149.1 or B149.2 Installation
Codes.
1. Two venting options are available for AHE boilers
— side venting and back venting.
2. Refer to Section 1, pages 4-7, of this manual
regarding requirements for:
• vent system
• clearances
• air openings
Vent/air intake termination
1. Vent/air intake must not be obstructed.
Boiler will not operate if vent/air
intake is plugged. Be sure that the
vent/air intake is unobstructed to
avoid possibility of severe personal
injury, death or substantial property
damage.
2. Locate or guard the vent to prevent accidental
contact by people or pets.
3. Gases will form a white plume in winter. Plume
could obstruct window view of nearby windows in
multi-story buildings.
4. Prevailing winds could cause freezing of condensate
and water/ice buildup on buildings or plants.
5. Locate or guard vent termination to prevent
condensate from damaging exterior surfaces.
6. Do not terminate vent above any door or window.
Condensate can freeze, causing ice formations.
7. Do not terminate vent in window well or stairwell.
8. Vent must terminate:
a. AHE-45 — 9" from any opening where gases
could enter building.
b. AHE-60 — 12" from any opening where gases
could enter building.
c. Bottom of vent/air intake terminal — 12"
above expected snowline.
d. Adjacent to public walkways — not less than 7
feet above grade.
e. At least 4 feet horizontally (and in no case
above or below unless a 4 foot horizontal
distance is maintained) from electric meters,
gas meters, regulators, relief valves and other
equipment.
Wall preparation
1. Boilers cannot be recessed into a wall. Back vented
boilers must be mounted on an outside wall.
2. Boiler can be mounted directly on wall, but not on
or over carpeting, when conventional framing with
16" stud spacing available or wall is masonry.
Be sure wall structure will support
boiler and its piping. If wall does not
have 16-inch stud spacing or is not
masonry, provide solid mounting
surface. Use ½" plywood cut 26"
high and width large enough to
overlap two studs (minimum 22½"
width). Refer to dimensions table on
page 46 and note boiler weight.
Purchase 3" x
5
/
16
" toggle bolts to
anchor boiler to plywood.
3. See page 46 for boiler dimensions.