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SlimFit
Series 2
®
PVC Venting allowed per requirements specified below.
Figure 23
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 connected
after the existing boiler is removed.
Failure to follow all instructions can result in
flue gas spillage and carbon monoxide emis-
sions, causing severe personal injury or death.
When removing a boiler from an
existing common vent system
The SlimFit boiler cannot be common vented with any
other appliances See Category II venting requirements
for additional venting options
replaced with a SlimFit boiler, the SlimFit boiler CANNOT use
the existing common vent. The SlimFit boiler requires 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 other
appliances remaining connected to the common venting system
are not in operation. Seal any unused openings in the common
venting system.
26
commercial condensing gas
. When an existing boiler is
— Boiler Manual
-
fired water boiler
Both 5 feet
lengths of pipe
and fittings are
CPVC
PVC can only be used on the exhaust of a
boiler after 10 linear feet of CPVC pipe.
All fittings within the first 10 feet must be
CPVC.
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 hori-
zontal pitch and determine 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 appliances remaining connected to the common venting
system are located and other spaces of the building. Turn
on clothes dryers and any appliance not connected to the
common 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 appliance remaining
connected to the common 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.
Any improper operation of the common venting system should
be corrected so the installation conforms with the National Fuel
Gas Code - ANSI Z223.1/NFPA54 – latest edition, and/or the
Natural Gas and Propane Installation Code, Natural Gas and
Propane Installation Code - CAN/CSA B149.1. When resizing
any portion of the common venting system, the common venting
should be resized to approach the minimum size as determined
using the appropriate tables in Chapter 13 of the National Fuel
Gas Code - ANSI Z223.1/NFPA54 – latest edition, and/or the
Natural Gas and Propane Installation Code, CAN/CSA B149.1.
Exhaust ONLY after 10 linear feet, the
pipe and fittings can then be transitioned
from CPVC to PVC.
Part number 550-100-561/0224
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