6
Locating The Boiler
Select level location, central to piping systems served
1.
and close to vent and air intake terminals as possible.
Accessibility clearances, if more stringent (i.e. larger
2.
clearances) than required fi re protection clearances,
must be used for boiler installation. Accessibility
clearances may be achieved with use of removable
walls or partitions.
Clearances shown in Table 4 indicate required
3.
clearances per CSA listing. Minimum 1” (25 mm)
clearance must be maintained between combustible
construction and each of the right, top and back
surfaces of boiler. Minimum 8” (203 mm) clearance is
required on left side, to allow room for inlet air pipe.
18” (457 mm) clearance must be maintained at front
where passage is required for cleaning or servicing,
inspection or replacement of any parts that normally
require such attention. Allow 24” (610 mm) at front
and left side and 8” (203 mm) at top for servicing.
No combustible clearances are required to venting or
combustion air intake piping.
- BOILER CLEARANCES
Table 4
Unit
Combustible
Clearance
Accessibility, Cleaning,
and Servicing
Top
1” (25 mm)
8” (203 mm)
Left Side
8” (203 mm)
24” (610 mm)
Right Side
1” (25 mm)
-
Base
1” (25 mm)
-
Front
0” (0 mm)
24” (610 mm)
Back
1” (25 mm)
-
Intake/Vent
Piping
0” (0 mm)
-
Near Boiler Hot
Water Piping
1” (25 mm)
-
All distances measured from boiler cabinet.
Keep boiler area clean of debris and free of fl ammable
4.
and combustible materials, liquids and vapors.
Install equipment in location which facilitates operation
5.
of venting and combustion air intake piping systems as
described in this manual.
Advise owner to keep venting and combustion air
6.
intake passages free of obstructions. Both venting
and combustion air intake piping systems connected
to outdoors must permit fl ow through piping systems
without restrictions for boiler to operate.
Boiler shall be installed such that automatic gas
7.
ignition system components are protected from water
(dripping, spraying, rain, etc.) during operation and
service (circulator replacement, condensate trap,
control replacement, etc.).
Boiler must be located where ambient temperatures
8.
(minimum possible room temperatures where boiler
is installed assuming boiler is not in operation and
therefore contributes no heat to space) are always
at or above 32°F (0°C) to prevent freezing of liquid
condensate.
If boiler is not level condensate drain lines will not
9.
function properly. Adjustable feet are located on boiler
to make up for minor surface irregularities or tilt.
Wood frame or blocks may be used to raise boiler
10.
to maintain drain pitch or to be above external
condensate pump reservoir.
3 - LOCATING THE BOILER
Removal Of Existing Boiler From Common Vent
System
When an existing boiler is removed from a common
venting system, the common venting system is likely to be
too large for proper venting of the appliances remaining
connected to it. At the time of removal of an existing boiler,
the following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances remaining
connected to the common venting system are not in
operation.
Seal any unused openings in the common venting
1.
system.
Visually inspect the venting system for proper size and
2.
horizontal pitch and determine there is no blockage
or restriction, leakage, corrosion or other defi ciencies
which could cause an unsafe condition.
In so far as is practical, close all building doors and
3.
windows and all doors between the space in which the
appliances remaining connected to the common venting
system are located and other spaces of the building.
Turn on clothes dryer and any appliance not connected
to the common venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhaust, so
they will operate at maximum speed. Do not operate a
summer exhaust fan. Close fi re dampers.
Place in operation appliance being inspected. Follow
4.
lighting instructions. Adjust thermostat so appliances
operate continuously.
Test for spillage at draft hood relief opening after 5
5.
minutes of main burner operation. Use fl ame of match
or candle, or smoke from cigarette, cigar or pipe.