Operating instructions
Part number 550-141-887/0800
14
AHE Series 4 Direct Vent Wall-Mounted Boilers — Boiler Manual
3 Prepare boiler — placement and setup
Hang boiler on mounting panel
1. Remove crate top and wrapper. Leave bottom skid
attached to boiler to aid hanging boiler.
2. Cut bottom shipping strap located around boiler
base. Do not cut upper strap.
3. Place generous amount of silicone sealant around
plenum box openings on mounting panel. Set
gaskets (provided) in place. See Figure 11.
4. Carefully lift and hang boiler on mounting panel
hooks. Boiler hanger holes are located on upper
boiler back. Bottom skid may be adjusted to allow
boiler to hang on hooks.
Boiler is heavy. Care must be taken
to prevent personal injury or
damage to boiler.
5. Cut upper strap. Remove skid.
6. Fasten cotter pin in hole located in left mounting
panel hook to prevent boiler from lifting off hooks.
7. Use (1) #10 x ½" Phillips screw with holding bracket
to secure boiler. See Figure 11.
Inspect orifices and burners
1. Remove burner inlet plenum cover (see Figure 30,
item 9, page 42).
2. Carefully remove ignitor and ignitor gasket. Use
caution — ignitor is brittle and can break.
Wait several minutes until ignitor
cools down before removing. Failure
to do so will cause severe personal
injury.
3. Check for correctly-size burner orifices. See Table
3 for sizing. (The orifice size is stamped on the
orifice spud barrel.)
Correctly-sized manifold orifices
must be used. Failure to do so will
result in severe personal injury,
death or substantial property
damage.
4. Replace ignitor, ignitor gasket and burner inlet
plenum cover.
Figure 11
88706
Cotter pin
Holding bracket and screw (1)
1
1
1
2
2
2
2
Supplied with boiler
(in envelope)
Attached per venting instructions,
Manual Section 2
Table 3 Manifold orifice sizing
Location Natural gas Propane gas
U.S.
0-2,000 ft. over 2,000 ft. 0-2,000 ft. over 2,000 ft.
#48 (see Note) 1.15 mm (see Note)
Canada
0-2,000 ft. 2,000-4,500 ft. 0-2,000 ft. 2,000-4,500 ft.
#48 #49 1.15 mm #58
Note: For elevations above 2,000 feet, contact your local Weil-
McLain sales office for details.