Weil-McLain SVF 1500 Manual page 29

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Venting/combustion air — options
Category II Requirements
TM
In addition to the SVF
boilers Category IV rating (positive pres-
sure, likely to condense), SVF
II (negative pressure, likely to condense) as well.
Th is venting option includes / requires:
Th e Vent system for a Category II SVF
Designed / Engineered vent system and should be designed by a
professional using accepted engineering practices in accordance to
local authority having jurisdiction.
Vertical Vent termination only.
other appliances.
bustion Air opening requirements on page 33 .
straight pipe directly aft er the vent/air adapter before any diam-
eter or direction changes in the vent. See chart below for Boiler
Model specifi c vent size.
vertical vent pipe immediately following the boiler is between the
ranges provided in the Table 2 below, during all operating condi-
tions i.e., High Fire, Low Fire, etc.
Flue gas temperature should not exceed 210°F, the boiler will shut
down and recycle if it does, at a fl ue temperature of 200°F, the
boiler will start to reduce the fi ring rate. Th e fl ue gas temperature
should typically be within 20°F - 30°F of the return water tem-
perature of the boiler. If there is the potential for a wide variation
in return water temperatures, the lowest possible temperature
should be used for any calculations.
Stack / Vent Flow Rate for each individual boiler model is listed
in the table below. Th is fl ow rate is based on the unit running at
9.0% CO and the maximum fl ue gas temperature of 200°F. Th e
2
values can vary depending on the location of the installation and
operating conditions.
Table 2 Rating and Vent Data
Boiler
Model
SVF 1500
SVF 2000
SVF 2500
SVF 3000
Boiler vent and air connections:
The SVF boiler vent/air connection is sized for the following vent sizes/ materials:
1. SVF 1500/2000 8" Duravent-FasNSeal
2. SVF 2500/3000 10" Duravent-FasNSeal
Installer must provide the correct adapters/reducers needed to connect to other approved vent manufacturer's products.
Part number 550-100-250/0819
TM
boilers are approved for Category
TM
boiler is considered a
Stack / Vent
Input
Btuh scfm
1,500,000 415
1,999,000 553
2,499,000 692
3,000,000 830
A carbon monoxide detector(s) is required in the boiler
TM
room for SVF
boilers installed in a Category II confi guration.
Th e carbon monoxide detector must be wired on the same
electrical circuit as the boiler. Check your local codes for any
additional requirements of carbon monoxide detectors.
Venting
Figure 24
8" or 10" diameter straight pipe
minimum 3 ft . height
Negative Pressure to be
maintained at
Vent Connection of the boiler
-0.001 to -0.100
-0.001 to -0.100
-0.001 to -0.100
-0.001 to -0.100
Connection/Minimum
Vent Diameter
required for
Category II
(See Note 1)
8"
8"
10"
10"
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