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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, or applicable provisions of the local
codes. In Canada follow CAN/CGA-B149.1 or .2
Installation Codes. Always use latest edition of codes.
The following guideline is taken from the
CAN/CGA-B149 Code:
Combustion air supply shall have a cross sectional area
of not less than 100 in
in excess of 400,000 Btu/h. This opening(s) shall be
either located at, or ducted to, a point neither more than
18 inches nor less than 6 inches above the floor level.
In addition to the combustion air supply, a ventilation air
supply connection shall be made at the highest practical
point communicating with outdoors with a minimum
area of 10% of the combustion supply opening area.
ATTENTION
The boiler must not be located in areas or rooms where
chemicals are stored, or aggressive vapors (for
example: bleach, hair spray, methyl chloride, carbon
tetrachloride or perchloroethylene) or high dust levels or
humidity levels are present. Heat exchanger corrosion
might occur and reduce the lifetime of the boiler
significantly. If above criteria are not properly observed
and boiler damage results, any warranty on the
complete boiler and related components will be null and
void.
Fig. 6
Draft hood – exploded view
6
2
plus 1 in
2
for each 14,000 Btu/h
3
2.4.1 Assembly (see Figs. 6, 7, 11, 23, 26)
These instructions cover the assembly of the standard
boiler with right hand water and left hand gas
connections. Prior to installing the jacket assembly,
ensure that the boiler well(s), plug, and flanges are
tight. Refer to sections 8.2 and 8.4 for burner assembly
instructions.
2.4.2 Draft hood
The draft hood is made up from four separate panels,
refer to Fig. 6
a)
Place top panel upside down on floor.
b)
Attach the side panels to the top panel using the
self-tapping screws (12 x
socket is required.
c)
Attach the front panel using the self-tapping
screws.
Note: On RS-14 models only, install the downdraft
deflector inside the draft hood using 2 Phillips screws.
Ensure that there are no visible gaps where the panels
are fastened together.
Mounting draft hood
The draft hood is mounted to the boiler using four M8 x
30 bolts and nuts. Refer to Fig. 7 for further details.
2.4.3 Boiler jacket assembly (see Fig. 26)
Install pilot burner (section 8.4) and wiring prior to
assembling jacket.
5
4
1
⁄
˝). An 8 mm or
2
6
1
2
1 Top panel
2 Right side panel
3 Left side panel
4 Front panel. Removable
for inspection and cleaning
5 Self-tapping screw – 12 x
6 Downdraft deflector (RS-14 only)
5
⁄
˝
1 6
1
⁄
˝
2
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