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505047 09/06
Requirements
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.
Installation and service must be performed by a
qualified installer or service agency.
Installation of Lennox CBWMV unit must conform with lo-
cal building codes. Refer to the electrical section (Page 8)
for US and Canadian electrical regulations.
When paired with a water heating device, refer to local
building codes for special considerations. Refer to water
heating device for agency and service clearances. Clear-
ances to combustibles for the CBWMV unit only is zero
inches on all sides. Table 1 lists recommended service
clearances.
Table 1
CBWMV Unit Service Clearances
Clearances Location Inches (mm)
Recommended
Service Access
Front Access
Panel
30 (762)
NOTE − Service access clearance must be maintained.
Accessibility and service clearances must take prece-
dence over fire protection clearances.
For installation in a residential garage, unit must be lo-
cated or protected to avoid physical damage by vehicles.
The CBWMV unit must be installed so that its electrical
components are protected from water.
When the CBWMV unit is used with an air conditioner, the
air handler shall be installed on the upstream side of the
cooling evaporator coil to avoid freeze−up of water system
and condensation. With a parallel flow arrangement, a
damper (or other means to control the flow of air) must ad-
equately prevent chilled air from entering the air handler. If
the damper is manually operated, it must be equipped to
prevent operation of either the heating or the cooling unit,
unless it is in the full HEAT or COOL setting.
NOTE − CBWMV series units must not be used in or for the
following applications:
S construction heater − during any phase of construction
S unit heater
S mobile home heater
S potable water applications
Application
The CBWMV unit is designed for use in non−potable water
boiler systems. The water heating device must be ade-
quate to provide enough heat according to the Engineering
Handbook specifications. The water heating device must
provide a minimum of 6 gallons/minute for small units
(CBWMV−040, −070) and 9 gallons/minute for large units
(CBWMV−090, −100, −120).
Installation − Setting Equipment
WARNING
This product contains fiberglass wool.
Disturbing the insulation during installation, main-
tenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass wool is known to the State of California to
cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
The boiler installation must conform to the requirements of
the authority having jurisdiction or, in the absence of such
requirements, to the latest revision of the National Fuel
Gas Code, ANSI Z223. (Available from the American Gas
Association, 8501 E. Pleasant Valley Road, Cleveland,
OH 44134). Reference should also be made to local gas
utility regulations and other codes in effect in the same
area in which the installation is to be made. When installed
in Canada: The latest revision of the CAN1/CSA−B149.1
and/or B149.2 Installation Codes for Gas-Burning Equip-
ment and/or local codes.
Determine the CBWMV unit installation location and posi-
tion units so that door panels are accessible. Keep in mind
routing of the water and plumbing lines and electrical con-
nections.
The CBWMV unit is multi−positional. No adjustment is nec-
essary to apply unit for upflow or horizontal discharge. A
downflow base is available and provides clearance for
routing the inlet/outlet water lines when the CBWMV unit is
applied without an add−on cooling coil. Downflow applica-