Venting And Combustion Air Options; Test Procedure For Existing Vent System - Weil-McLain 4 Series Manual

insTallaTion

Venting and Combustion Air Options

1
Existing Category I Vent System
WARNING
!
Follow all venting and piping instructions. Failure
to follow all instructions can cause flue gas
spillage and carbon monoxide emissions, which
2
can result in severe personal injury or death.
For additional venting requirements, see page 45
Removal of the previous boiler may cause an issue
for the appliances that remain on the old common
3
vent as 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

Test Procedure for Existing Vent System

4
Perform this test when removing a boiler from the
common venting system The following steps shall be
followed with each appliance remaining connected
to the common venting system Test each appliance
separately while in operation Ensure all other
appliances connected to the common vent are not in
operation Seal any unused openings in the common
5
venting system before proceeding with the test
1 Visually inspect the venting system for proper
size and horizontal pitch Ensure there is no
blockage, restriction, leakage, corrosion, or other
deficiency that can cause an unsafe condition.
6
2 Close all building doors and windows as practical
Close all doors between the location of the
appliances connected to the common venting
system and other spaces of the building
7
8
40
sTeam series
94
3 Turn on the clothes dryer and any other appliance
not connected to the common venting system Turn
on all exhaust fans, except for a summer exhaust
fan, and operate at maximum speed Exhaust fans
include range hoods and bathroom fans Close
fireplace dampers.
4 Place the appliance being inspected into
operation Follow the lighting instructions Adjust
the thermostat so the appliance will operate
continuously
5 Test for spillage at the draft hood relief opening
after five minutes of main burner operation. Use
the flame of a match or candle, or smoke from a
smoke stick
6 After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as outlined
here, return doors, windows, exhaust fans,
fireplace dampers, and any other gas-burning
appliance to their previous conditions of use
Correct any improper operation of the common venting
system so the installation conforms with the National
Fuel Gas Code – ANSI Z223 1/NFPA 54, latest edition
When resizing any portion of the common venting
system, approach the minimum size as determined
using the appropriate tables in part 11 of the National
Fuel Gas Code – ANSI Z223 1/NFPA 54, latest edition
boiler manual
4
550-100-157/0523