ATTENTION
Follow local regulations with respect to CO detectors. Follow
all safety information from LP or gas supplier.
Combustion air supply (see Fig. 2)
This boiler needs fresh air for safe operation and must be
installed so there are provisions for adequate combustion and
ventilation air. Refer to requirements of local jurisdictions in
addition to the information in this manual.
All combustion air must come from the outside.
Provisions for combustion and ventilation air must be made in
accordance with section 5.3, Air for Combustion and
Ventilation, of the National Fuel Gas Code, ANSI Z223.1
(latest edition) or applicable provisions of the local codes. In
Canada follow CAN/CSA-B149.1 or .2 Natural Gas Installation
Codes (latest edition) for combustion and ventilation air
requirements.
Whenever possible install boiler near an outside wall so that it
is easy to duct fresh air directly to the boiler area. See
example in Fig. 2. Refer to national codes for duct sizing.
Round ducts can be used.
Outside air must enter the house to replace the air used by the
boiler. When the boiler operates, the burner needs a
continuous supply of oxygen which is supplied by the air
entering the structure. Without a continuous supply of oxygen
the flames will incompletely burn and can allow poisonous
carbon monoxide gas to circulate into the living space.
Any home with bathroom or kitchen exhaust fans or heat
recovery ventilator units should have outside air intake.
You must check with local authorities (municipal building
department, gas utility) for combustion air requirements
particular to your area.
Caution:
Whenever your boiler is installed in a structure with airtight
features such as vapor barrier or tight insulation, there must be
a combustion air duct installed to supply air from the outside
even though the boiler may be installed in a space with a
volume large relative to the boiler.
6
Fig. 1
ECD- (65-155) Closet installation minimum clearances
ECD-(65-155)
6˝
(150mm)
1˝
(25mm)
6
˝
(150mm)
6
˝
(150mm)
18
˝
(458mm)
Fresh combustion air
ventilation openings
2 openings 10 x 20 each
Side view
Fig. F
Alcove installation for ECD- (180, 200)
All dimensions shown are minimum
Vent pipe
Exp.
tank
Return
Supply
ECD-(180, 200)
1˝
Drain
valve
24˝
PRV
18˝
Concrete non-combustible floor
Left side view
Ventilation opening
Front of alcove must
be removable for
service access
Combustion air
opening
Each opening shall have an area
of one square inch per 1000 Btu/h
of input
ECD
Opening size
180
10 x 20
200
10 x 20
Warning:
Failure to provide an adequate supply of fresh
combustion air can cause poisonous flue gases to enter
living space which can cause severe personal injury or
loss of life.
Fig. 2
Boiler located in dedicated mechanical room
with combustion air ducted in from outside.
Electrical
on/off switch
for boiler
Vent
Outside
Air flow
Combustion
air ducted from
outside