Weil-McLain SVF 1500 Manual page 28

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Appliances remaining on an existing vent system
Figure 23 PVC
Exhaust ONLY after 10 linear feet,
transitioned from CPVC to PVC.
Vent connection is sized for DuraVent- FasNSeal
AL29-4C venting. Installers must provide the correct
PVC/CPVC adapters.
SVF 1500/2000 8" Duravent-FasNSeal
SVF 2500/3000 10" Duravent-FasNSeal
PVC can only be used on the exhaust of a boiler aft er 10
linear feet of CPVC pipe.
All fi tt ings within the fi rst 10 feet must be CPVC.
Do not install the SVF
vent with any other appliance. Th is will cause fl ue
gas spillage or appliance malfunction, resulting in
possible severe personal injury, death or substan-
tial property damage.
Existing common vent systems may be too large
for the appliances remaining connected aft er the
existing boiler is removed.
Failure to follow all instructions can result in fl ue
gas spillage and carbon monoxide emissions,
causing severe personal injury or death.
When removing a boiler from an
existing common vent system
The TM
SVF
TM TM
with a SVF boiler, the SVF
boiler CANNOT use the existing com-
TM
mon vent. Th e SVF
boiler requires its own vent and air piping, as
specifi ed in this manual. Th is may cause a problem for the appliances
that remain on the old common vent, because the vent may be too
large. Th e following test is intended to check for proper operation of
the appliances remaining on the old common vent system.
Vent system verifi cation
At the time of removal of an existing boiler, the following steps shall
be followed with each appliance remaining connected to the com-
mon 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.
28
Both 5 feet
lengths of pipe
CPVC
TM
boiler into a common
. When an existing boiler is replaced
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 determine there is no blockage or restriction, leakage, cor-
rosion or other defi ciencies 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 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 fi replace 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 aft er 5 minutes of main
burner operation. Use the fl ame of a match or candle, or smoke
from a cigarett e, cigar, or pipe.
5. Aft er it has been determined that each appliance remaining con-
nected to the common venting system properly vents when tested
as outlined herein, return doors, windows, exhaust fans, fi replace
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/NFPA 54 – latest edition, and/or the Natural
Gas and Propane Installation Code, Natural Gas and Propane Instal-
lation 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/NFPA
54 – latest edition, and/or the Natural Gas and Propane Installation
Code, CAN/CSA B149.1.
Part number 550-100-250/0819