FEATURES
Completely Tested —
Blower coil units are tested with match-
ing condensing units in the Lennox Research Laboratory envi-
ronmental test room in accordance with ARI Standard
210/240-89. Optional electric heaters are rated in accordance
with U.S. Department of Energy (DOE) test procedures and
Federal Trade Commission (FTC) labeling regulations. Blower
performance data is according to actual unit tests conducted
in Lennox air test chamber. Blower-coil units and components
within are bonded for grounding to meet safety standards for
servicing required by U.L., C.S.A., CEC and NEC.
Cabinet —
Constructed of heavy gauge galvanized steel and
completely insulated with thick fiberglass insulation. The pre-
painted steel cabinets have a finish of mildly textured enamel
with a primer coat on the unpainted side of all panels. Remov-
able panels provide complete service access. Electrical inlets
are provided in both sides of cabinet. Return air entry is pos-
sible in either side or bottom of cabinet on up-flow units.
Drain Pan —
Deep, corrosion resistant drain pan has dual
pipe drains extended outside of cabinet for ease of connec-
tion. See dimension drawings.
Direct Drive Blower —
Equipped with a Lennox designed and
built direct drive blower. Each blower is statically and dynami-
cally balanced as an assembly before it is installed in the
unit. Multi-speed motor is resiliently mounted. A choice of
blower speeds is available. See blower performance tables.
Change of blower speeds is easily accomplished by a simple
change in wiring.
Refrigerant Line Connections —
Suction (vapor) and liquid
lines have sweat connections and extend outside of the cabinet
for ease of connection. See dimension drawings for locations.
Check and Expansion Valve Furnished —
Check and expan-
sion valve furnished and factory installed on all models.
Copper Tube/Enhanced Fin Evaporator Coil —
Lennox de-
signed twin coils, assembled in a ‘V’ configuration, provides
extra large surface and contact area, excellent heat transfer
and low air resistance for maximum efficiency. Precise cir-
cuiting gives uniform refrigerant distribution. Lennox fabri-
cated coil is constructed of precisely spaced ripple-edged alu-
minum fins fitted to durable seamless copper tubes. Fins are
strengthened to resist bending and are equipped with collars
that grip tubing for maximum contact area. Lanced fins pro-
vide maximum exposure of fin surface to air stream. Flared
shoulder tubing joints and silver soldering provide tight, leak-
proof joints. Long life copper tubing is easy to field service.
Coil is thoroughly factory tested under high pressure to in-
sure leakproof construction.
Transformer and Blower Cooling Relay —
A 24 volt trans-
former and blower cooling relay are furnished as standard
equipment and are factory installed in the unit control box.
A terminal strip is also furnished as standard.
OPTIONAL ACCESSORIES (Must Be Ordered Extra)
Electric Heat (Optional) —
Additive electric heaters field install
internal to the unit cabinet and are available in several kw sizes,
see Electric Heat table. The helix wound nichrome bare heat-
ing elements are exposed directly in the air stream resulting in
instant heat transfer, low element temperatures and long ser-
vice life. Each heating element is equipped with accurately lo-
cated limit control with fixed temperature off setting and auto-
matic reset. In addition, elements have supplemental thermal
cutoff safety fuses providing positive protection in case of ex-
cessive temperatures. Cutoff fuses are mounted external to
the element face plate for quick and easy replacement. Ther-
mal sequencer relay brings the heating elements on and off line,
in sequence and equal increments, with a time delay between
each element. Sequencer also initiates and terminates blower
operation. Heating control relay(s), is furnished as standard.
Control box and access cover are constructed of heavy gauge
galvanized steel. Heaters are factory assembled with controls
installed and wired and only require plug-in field connection.
Circuit Breakers — ECB19-12.5,-15,-20,-25 and -30 kw
(208/240v-1ph) and ECB19-15,-20 and -25 kw (208/240v-3ph)
electric heaters are equipped with circuit breakers to provide
overload and short circuit protection. Breakers are factory
wired and mounted on electric heat unit. Circuit breakers are
current sensitive and temperature actuated to shut off heater if
current draw is excessive. Must be reset manually. Circuit
breakers qualify as the disconnect means at unit in many
areas and eliminate the need for a field provided disconnect.
Consult local electrical code in your area.
Single-Point Power Source Control Box (Optional) —
Control
Box
(21H39)
may be used with optional electric heat when
two or three circuits (if required by code) are specified. Field
installs external to the unit cabinet on either side or top. Pro-
vides single power service connection to the unit.
Constructed of heavy gauge steel with baked enamel finish,
prepunched mounting holes, electrical inlet knockouts, and
terminal strip. Removeable cover provides easy access.
Box is 7” x 7” x 4” deep (178mm x 178mm x 102mm), shipping
weight is 5 lbs. (2 kg.)
CCB1 EfficiencyPlus
Humidity Control (Optional) —
The
CCB1 Humidity Control
(35H00)
is an electronic control which
installs next to the room thermostat and allows the selection of
the desired indoor humidity level in the cooling mode. During
the heating season the control is inoperable. The CCB1 controls
the indoor humidity by alter-
ing the indoor blower speed
and the compressor speed.
Humidity level desired may be
accomplished by adjusting a
vertical slide to a set point on
a scale of 40% thru 60% with
50% recommended as the ini-
tial set point. Five indicator
lights (MIN — MAX) in a bar
graph configuration indicate
the difference in the actual rel-
ative humidity and the set point. This indicates the demand
imposed on the system equipment, the more lights on, the
longer the equipment will operate to obtain the desired hu-
midity level. If no lights are on, the humidity is at or below the
set point. Control is not furnished and must be ordered extra.
Requires EBR1 Blower Relay Kit
EBR1 Blower Relay Kit (Optional) —
EBR1 Blower Relay Kit
(75H90)
allows CCB1 to be used with CB19/CBH19 blower
coil units.
Down-Flow Additive Base (Optional) —
An optional additive
base is required for models with electric heat installed in the
down-flow position on combustible floors. Base is not furnished
and must be ordered extra for field installation. See Specifica-
tions table and dimension drawing.
Air Filters (Not Furnished) —
Filters must be ordered extra. See
Specifications tables for sizes. Filter rails are provided in return
air opening of unit. See dimension drawings.
CB19 Up-Flow Side Return Air Filter Adaptor (Optional) —
Field installs on either side return air opening of up-flow cabi-
net. Constructed of heavy gauge galvanized steel with a baked-
on paint finish. Equipped with flanges for ease of duct connec-
tion. Access panel allows easy removal an replacement of
filter(s). One inch thick (25mm) frame type filter is furnished as
standard. Media is washable or vacuum cleanable oil coated
polyurethane. CB19-21 thru 41 adaptor requires one filter.
CB19-51 and CB19-65 model has two. See Specification table
for sizes. CB19-51 and CB19-65 fiberglass insulated adaptor is
shipped knocked down and must be field assembled.
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