Lennox COWB2

5
Complete all of the following prior to installing the
boiler.
A. Check to be sure you have selected the right size
boiler with the proper capacity. The I=B=R rating of
the boiler selected should be greater than or equal
to the calculated peak heating load (heat loss) for
the building or area(s) served by the boiler and
associated hot water heating systems. See boiler
rating and capacity table previously listed in this
manual. Any heat loss calculations used should be
based on approved methods.
B. Boiler must be supplied with the proper oil supply
and oil piping, sufcient fresh combustion air, and a
suitable electrical supply.
C. Boiler must be connected to a suitable venting
system and a piping system adequate to distribute
the heating load.
D. A thermostat must be properly located and installed
for control of the heating system.
If there are any doubts as to the various requirements,
check with local authorities and obtain professional help
where needed. The OPERATING INSTRUCTIONS,
FINAL CHECKS AND ADJUSTMENTS, and
MAINTENANCE sections in this manual are vital to
the proper and safe operation of the heating system.
Take the time to be sure they are all done.
1. Place the boiler in a location centralized with the piping
system and as close to the chimney as possible.
2. The boiler must be level. If necessary use metal
shims beneath the boiler’s feet.
3. Use a raised base if the oor can become wet or
damp.
4. Maintain clearances for re safety as well as servicing.
An 18” clearance must be maintained at a side where
passage is required for access to another side for
cleaning, servicing, inspection, or replacement of
any parts that normally may require such attention.
Boilers must be installed at least 6” from combustible
material on all sides and above. Allow at least 24”
front clearance for servicing.
5. Fresh air for combustion must be available at the
front of the boiler. Fresh air for ventilation must
be available to the front and rear of the boiler. Air
passages must be free of obstructions at all times.
Ventilating and combustion air must enter boiler
room without restrictions.
6. The oor supporting the boiler must be noncombustible
and sufciently stable. If it is combustible, place the
boiler on 2” concrete patio blocks or 2” Cladlite
Pad™. The blocks or pad must be under the entire
boiler to protect the oor.
7. Be sure installation is in accordance with the
requirements of the local authorities having
jurisdiction. Compliance with these regulations
is required. In the absence of local codes, follow
NFPA 31 Installation of Oil Burning Equipment,
latest revision.
BeFOre YOU sTarT
lOCaTiNg THe BOiler
BOILER CLEARANCES
Unit
Combustible
Clearance
Accessibility,
Cleaning, and
Servicing
Flue to
Combustible
Clearance
Top 6” 18”
18”
Left Side 24” 24”
Right Side 6”
Base noncombustible
Front 18”
Back 6”
All distances measured from the cabinet of the boiler.
24” Min.
6”
Min.
6”
Min.
6” Min./18” With Coil
Boiler
Front
MiNiMUM ClearaNCe diMeNsiONs