4
Locating the Boiler
1. Select level location as centralized with piping system, and
as near chimney, as possible.
2. Place crated boiler at selected location, remove crate
by pulling crate sides from top and bottom boards.
Combustible floors: When boiler is to be installed on a
combustible floor, a Special Base Plate must be used -
146-14-031 (2-6 Section) or 146-14-032 (7-9 Section).
This boiler must not be installed on carpeting.
3. Boiler is to be level. Metal shims may be used under
base legs for final leveling.
4. Additional clearances for service may exceed clearances
for fire protection. Always comply with the minimum fire
protection clearances shown on the boiler. An 18 inch
clearance should be maintained on any side where
passage is required to access another side for cleaning,
servicing, inspection or replacement of any part that may
need attention. An 18-inch clearance is recommended
on the control side for servicing.
Figure 2 shows minimum clearances to combustible
construction. Rooms that are large in comparison with
the size of the boiler are defined as rooms having a
volume equal to or greater than 16 times the volume of
the boiler. Where the actual ceiling height of a room is
greater that 8', the volume of a room shall be figured on
the basis of a ceiling height of 8'. Determination of room
size should be based do the total volume of all gas fired
equipment installed in the room. Consult section 6.3.1
of the National Fuel Gas Code for further information,
including approved methods for reducing clearances in
large rooms.
5. Equipment shall be installed in a location in which the
facilities for ventilation permit satisfactory combustion
of gas, proper venting, and maintenance of ambient
temperature at safe limits under normal conditions of use.
Equipment shall be located so as not to interfere with
proper circulation of air. When normal infiltration does
not provide the necessary air, outside air shall be
introduced (See Page 4 - “Fresh Air for Combustion”).
6. Advise owner to keep air passages free of obstructions.
Ventilating and combustion air must enter boiler room
without restrictions.
7. The boiler shall be installed such that the automatic gas
ignition system components are protected from water
(dripping, spraying, rain, etc.) during appliance operation
and service (condensate trap, control replacement, etc.).
2-5 SECT. 6-9 SECT.
2-9 SECT.
Top
6"
6"
6"
Rear
6"
6"
6"
Control Side
8"
24"
6"
Opposite Side
6"
24"
6"
Front
18"
18"
18"
Flue/Vent Connector
6"
6"
6"
Near Boiler Piping
1"
1"
1"
Alcove, or Room Not
Large in Comparison
With Boiler
Room Large In
Comparison
With Boiler
FIG. 2 - MINIMUM CLEARANCE DIMENSIONS
Minimum Room
Boiler
Boiler
Volume Required
Size
Volume
To Be Large
(Cu. Ft.)
Room (Cu. Ft)*
2 sect.
3.8
61.6
3 sect.
5.4
86.6
4 sect.
7.0
111.6
5 sect.
8.5
136.6
6 sect.
10.1
161.7
7 sect.
11.7
186.7
8 sect.
13.2
211.7
9 sect.
14.8
236.7
*
FOR ROOM WITH SINGLE BOILER ONLY THIS UNIT MUST
BE SET ON A CONCRETE OR OTHER NON-COMBUSTIBLE
MATERIAL BASE OR FLOOR.
Summary of Contents for PVWB
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