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SlimFit
Series 3
Venting/combustion air — options
Use only the materials listed below, ensuring that all materials meet local codes
Duravent / M&G – Polypro
Centrotherm Eco Systems – InnoFlue
be connected. Adapter is available from Dura-Vent or Weil-McLain (see page 109 for part number).
Appliances remaining on an existing vent system
Do not install the SlimFit boiler into a common vent with any other appliance. This
will cause flue gas spillage or appliance malfunction, resulting in possible severe
personal injury, death or substantial property damage.
Existing common vent systems may be too large for the appliances remaining con-
nected after the existing boiler is removed.
Failure to follow all instructions can result in flue gas spillage and carbon monoxide
emissions, causing severe personal injury or death.
When removing a boiler from an
existing common vent system
an existing boiler is replaced with an SlimFit
boiler, the SlimFit boiler CANNOT use the
existing common vent. The SlimFit boiler re-
quires its own vent and air piping, as specified
in this manual. This may cause a problem for
the appliances that remain on the old common
vent, because the vent may be too large. The
following test is intended to check for proper
operation of the appliances remaining on the
old common vent system.
Vent system verification
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
Part number 550-100-168/0516
COMMERCIAL CONDENSING GAS
®
Single-wall
PVC schedule 40
PVC-DWV schedule 40
CPVC schedule 40
PVC
CPVC
Dura-Vent – FasNSeal™
— Install Dura-Vent – FasNSeal™ adapter at each boiler fitting where stainless steel pipe will
other appliances remaining connected to the
common venting system are not in operation.
Seal any unused openings in the common vent-
ing system.
. When
Existing vent test procedure
(The following is intended to test
whether the appliances remaining on
an existing vent system will operate
satisfactorily.)
1. Visually inspect the venting system for
proper size and horizontal pitch and de-
termine there is no blockage or restriction,
leakage, corrosion or other deficiencies
which could cause an unsafe condition.
2. Test vent system — Insofar as is practical,
close all building doors and windows and all
doors between the space in which the appli-
ances remaining connected to the common
venting system are located and other spaces
—
-
FIRED WATER BOILER
Certified for Category IV and
direct vent appliance venting.
Certified for Category IV and
direct vent appliance venting.
ANSI/ASTM D1785
ANSI/ASTM D2665
ANSI/ASTM F441
ANSI/ASTM D2564/F656
ANSI/ASTM F493
Certified for Category IV and
direct vent appliance venting.
of the building. Turn on clothes dryers and
any appliance not connected to the com-
mon venting system. Turn on any exhaust
fans, such as range hoods and bathroom
exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust
fan. Close fireplace dampers.
3. Place in operation the appliance being
inspected. Follow the lighting instructions.
Adjust thermostat so appliance will operate
continuously.
4. Test for spillage at draft hood relief opening
after 5 minutes of main burner operation.
Use the flame of a match or candle, or
smoke from a cigarette, cigar, or pipe.
5. After it has been determined that each ap-
pliance remaining connected to the com-
mon venting system properly vents when
tested as outlined herein, return doors,
windows, exhaust fans, fireplace dampers,
and any other gas-burning appliance to
their previous conditions of use.
6. Any improper operation of common
venting system should be corrected so the
installation conforms with the National
Fuel Gas Code, ANSI Z223.1 — latest edi-
tion. Correct by re-sizing to approach the
minimum size as determined using the
appropriate tables in Part 13 of that code.
Canadian installations must comply with
B149.1 or B149.2 Installation Code.
Boiler Manual
Certified for Category IV and direct vent
appliance venting.
Certified for Category IV and direct vent
appliance venting.
ULC S636
PVC, PVC-DWV,
NA
CPVC
ULC S636
Use only cement
ULC S636
and primer
suitable for piping
ULC S636
material used.
Certified for Category IV and direct vent
appliance venting.
23
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