Install Instructions

Figure 21 Corrosive contaminants and sources
Venting/air piping — general
Part number 550-100-191/0917
22
®
gas-fired water boiler — 70/110/155 Boiler Manual
When removing a boiler from an existing
common vent system
The Evergreen
®
boiler cannot be common vented with any other
appliance
. When an existing boiler is replaced with an Evergreen
®
boiler,
the Evergreen
®
boiler CANNOT use the existing common vent. The boiler
requires its own vent and air piping, as specifi ed in this manual. This may
cause a problem for the appliances that remain on the old common vent,
because 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.
Vent system verifi cation
Perform the test sequence below for each appliance remaining on the
original common vent system. Operate each appliance individually, with
other appliances turned off. This procedure will test whether the common
vent system can properly vent each appliance.
Existing vent test procedure
(The following is intended to test whether the appliances remaining
on an existing vent system will operate satisfactorily.)
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch
and determine there is no blockage or restriction, leakage, corrosion or
other defi ciencies which could cause an unsafe condition.
3. 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
fi replace dampers.
4. Place in operation the appliance being inspected. Follow the lighting
instructions. Adjust thermostat so appliance will operate continuously.
5. Test for spillage at draft hood relief opening after 5 minutes of main
burner operation. Use the fl ame of a match or candle, or smoke from
a cigarette, cigar, or pipe.
6. 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, 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, CAN/CSA B149.1. When resizing 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 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.
Do not install the Evergreen
®
boiler into a common vent
with any other appliance. This will cause fl ue gas spillage or
appliance malfunction, resulting in possible severe personal
injury, death or substantial property damage.
Existing common vent systems may be too large for the
appliances remaining connected after 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.
Products to avoid
Spray cans containing chloro/fl uorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Adhesives used to fasten building products and other
similar products
Excessive dust and dirt
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refi nishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
You must pipe combustion air to the
boiler air intake
.
Install air inlet piping for the Evergreen
®
boiler as described in this manual.
The air termination fitting must
be installed with the clearances and
geometry relative to the vent outlet
depicted in this manual to ensure that
fl ue products do not enter the air intake.
Ensure that the combustion air will
not contain any of the contaminants
in Figure 16. Do not pipe combustion
air near a swimming pool, for example.
Avoid areas subject to exhaust fumes
from laundry facilities. These areas will
always contain contaminants.
Contaminated combustion air will
damage the boiler, resulting in possible
severe personal injury, death or
substantial property damage.