Removal Of An Existing Category I Appliance From A Common Vent System - Delta Performance PG-25 Installation And Maintenance Manual

Combustion Air and Venting
DANGER
Do not install the PERFORMANCE into
a common vent with other gas appliances
when venting as a Category III appliance.
This may cause flue gas spillage or appli-
ance malfunction, resulting in possible
severe personal injury, death or substan-
tial property damage.
Removal of an Existing Boiler from a
Common Vent System
BEST PRACTICES
For installations in which the PERFOR-
MANCE is installed as a category I
Appliance and is replacing an existing
boiler / hot water heater system, connect-
ed to a common vent system with other
appliances, the following steps shall be
conducted with each remaining appliance
connected to the common venting system:
1. Any unused openings in the common
venting system must be sealed.
2. A visual inspection of the venting sys-
tem must be conducted for proper siz-
ing and horizontal pitch. The inspec-
tion should ensure no blockage or
restriction is within the vent system,
and there is no leakage, corrosion or
other items, which could cause an
unsafe condition.
3. To adequately test the venting system,
close all exterior doors and windows
and all doors between the area contain-
ing the remaining appliances connected
to the common vent system and other
areas of the building.
clothes dryers and any other gas appli-
ance not connected to the common vent
system. Turn on all exhaust fans, i.e.
range hoods and bathroom exhaust
fans, preferably at maximum speed.
Close any fireplace dampers.
4. Place in operation the first appliance
5. Test for spillage at the draft hood relief
6. Once it has been determined that each
Should any improper operation of the common
venting system be detected in the outline test,
the condition should be corrected so the vent
system conforms with the National Fuel Gas
Code, NFPA 54/ ANSI Z223.1 - latest edition.
Canadian installations must conform with
B149.1 or 149.2 Installation Code.
Turn on any
11
being inspected that is connected to the
common vent system. The remaining
appliances should not be in operation.
Follow the appliance's lighting instruc-
tions and adjust the thermostat to allow
the appliance to operate continuously.
opening after 5 minutes of main burner
operation. Spillage can be detected
using the flame of a match or candle or
with smoke from a cigarette.
remaining appliance connected to the
common vent system is properly vent-
ed, return doors, windows, exhaust
fans, fireplace dampers and any operat-
ing gas appliance to their previous con-
dition.