Installation & Operation Manual
1
Determine boiler location
10
When removing a boiler from existing
common vent system:
Do not install the Crest into a common
vent with any other appliance except
as noted in Section 2 on page 19.
This will cause flue gas spillage or
appliance malfunction, resulting in
possible severe personal injury, death,
or substantial property damage.
Failure to follow all instructions can
result in flue gas spillage and carbon
monoxide emissions, causing severe
personal injury or death.
a. Seal any unused openings in the common venting
system.
b. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion, or other deficiencies,
which could cause an unsafe condition.
c. 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.
DANGER
WARNING
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.
d. Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
e. Test for spillage at the 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.
f. 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.
g. 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 and/or CAN/CSA B149.1, Natural Gas and Propane
Installation Code. When re-sizing any portion of the
common venting system, the common venting system
should be resized to approach the minimum size as
determined using the appropriate tables in Part 11 of
the National Fuel Gas Code, ANSI Z223.1/NFPA 54
and/or CAN/CSA B149.1, Natural Gas and Propane
Installation Code.
