106636-04 - 8/22
7
X-2
Installation, Operating & Service Manual
After Removing Existing Boiler
When an existing boiler is removed from a
common venting system, the common venting
system is likely to be too large for proper venting
of appliances remaining connected to it.
At 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:
1. Seal any unused openings in the common venting
system.
2. Visually inspect venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion, and
other deficiencies which could cause an unsafe
condition.
3. 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 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 maxi mum speed. Do not operate a
summer exhaust fan. Close fireplace dampers.
Before Removing Existing Boiler
Take pictures and measure and/or mark existing
steam and condensate return piping to ensure
proper re-piping of new boiler. Support existing
piping before disconnecting to prevent change in
pitch.
4. Place in operation appliance being inspected.
Follow Operating Instructions. See Figure 10-
1. Adjust thermo stat so appliance will operate
continuously.
5. Test for spillage at draft hood relief opening after 5
minutes of main burner operation. Use flame of a
match or candle, or smoke from a cigarette, cigar
or pipe.
6. After it has been determined that each appliance
remain ing connected to the common venting
system properly vents when tested as outlined
above, return doors, win dows, exhaust fans,
fireplace dampers and any other gas-burning
appliance to their previous condition of use.
7. 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. When resizing any portion of the
common venting system, the common venting
system should be resized to approach minimum
size as determined using appropriate tables in
Chapter 13 of the
National Fuel Gas Code,
ANSI
Z223.1/NFPA 54.
4
Locating Boiler
(continued)
