Weil-McLain SVF 1500 Manual page 9

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Prepare boiler
Provide air openings to room
Air openings — General
Follow the National Fuel Gas Code - ANSI Z223.1/NFPA54 – latest
edition (U.S.) or Natural Gas and Propane Installation Code - CAN/
CSA B149.1 (Canada) and all applicable codes to size/verify size of
the combustion/ventilation air openings into the space. See the vent-
ing instructions section of this manual for required air openings and
sizing for either direct vent or direct exhaust installation.
TM
SVF
Air openings — boiler alone in boiler room
1. DIRECT VENT — For direct vent installations (air piped to
boiler), no air ventilation openings into boiler room are needed
if clearances around the boiler are at least equal to the SERVICE
clearances shown in Figure 2, page 7. For spaces that DO NOT
supply the minimum service access clearances, see the direct
vent venting instructions in this manual for required openings,
see page 38.
2. DIRECT EXHAUST — For direct exhaust installations (combus-
tion air from inside, see page 32), provide air openings as specified
in the direct exhaust venting section of this manual.
SVF
TM
Air openings — boiler in same room with
other gas or oil-fired appliances
For direct vent installations (combustion air
1. DIRECT VENT —
piped to boiler), size openings only on the basis of the other appli-
ances in the space. No additional air opening free area is needed for
TM
the SVF
boiler because it takes its combustion air from outside.
For direct vent installations, when the boiler is located
in the same room as other appliances, provide combus-
tion air openings correctly sized for all appliances in the
room except the SVF
Failure to comply with the above warnings could result
in severe personal injury, death or substantial property
damage.
For direct exhaust installations, combus-
2. DIRECT EXHAUST —
tion air openings into the room must be sized to handle the SVF
boiler and all other appliances. See the direct exhaust venting
instructions in this manual for required openings.
The boiler control has the ability to operate a combustion air
damper. Refer to the "Aux/Pump Output" in the controls section.
Part number 550-100-250/0819
TM
boiler.
exhaust installations, the boiler draws combustion
air from the boiler room. If other appliances are
installed in the same room, provide combustion
air openings correctly sized for
including the SVF
Failure to comply with the above warnings could
result in severe personal injury, death or substantial
property damage.
Vent and air piping requirements
(starting on page 24 through page 45)
TM
1. The SVF
boiler requires a special vent system.
TM
a. SVF
boilers are ANSI Z21.13 rated as Category II , see
page 29.
(negative pressure vent, likely to condense in the vent).
from inside.
TM
. SVF
boilers are ANSI Z21.13 rated as Category IV, see
page 38.
(positive pressure vent, likely to condense in the vent).
TM
SVF
commercial boilers can be either:
from inside or . . .
— both vent and air piped outside.
c. See instructions beginning on page 24 for vent/air configura-
tion options and installation requirements.
2. Note "Prevention of combustion air contamination" on page 26
when considering vent/air terminations and boiler room condi-
tions when using inside air (direct exhaust installation).
3. Be sure to locate the boiler such that the vent and air piping can be
routed through the building and properly terminated. The vent/air
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piping lengths, routing and termination method must all comply
with the methods and limits in instructions beginning on page 31.
4. Also locate the boiler such that you have the ability to inspect
the vent pipes for leaks or any signs of deterioration. Repair or
replace as necessary. Inspect and replace any existing vent pipes
before installing boiler.
— On direct
ALL
appliances,
TM
boiler.
— vent to the outside, combustion air
— vent to the outside, combustion air
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