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Fan Coil Unit — Horizontal Models
HVAC Guide Specifications — 42C
Size Range: 200 to 1200 Nominal Cfm
Carrier Model Numbers:
42CA (Furred-in)
42CE (Furred-in with Plenum)
42CG (Cabinet)
42CK (Furred-in, Telescoping Panel)
Part 1 — General
1.01 SYSTEM DESCRIPTION
Horizontal, 2-pipe or 4-pipe (or electric heat), room
fan coil unit with furred-in, above ceiling cabinet
for ducting, or with cabinet for exposed ceiling
installations.
1.02 QUALITY ASSURANCE
Units shall be tested and certified in accordance with
AHRI (Air-Conditioning, Heating, and Refrigeration
Institute) standard 440, latest edition. All units shall
have C-ETL-US listing signifying the units have been
examined by ETL and are in compliance with both
the US and Canadian applicable standards. Each
coil shall be factory tested for leakage at 300 psig air
pressure with coil submerged in water. Insulation
and adhesive shall meet NFPA (National Fire Protec-
tion Association) 90A requirements for flame spread
and smoke generation. All equipment wiring shall
comply with NEC (National Electrical Code) require-
ments.
1.03 DELIVERY, STORAGE AND HANDLING
Each unit shall be individually packaged from point
of manufacture. Unit shall be handled and stored in
accordance with the manufacturer’s instructions.
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory-assembled, horizontal, blow-thru type fan
coil for furred-in, exposed ceiling or ducted installa-
tions. Unit shall be complete with water coil(s),
fan(s), motor(s), drain pan, and all required wiring,
piping, controls and special features. Standard insu-
lation shall be dual density fiberglass insulation.
B. Furred-in Base Unit (42CA):
1. Casing is 18-gage galvanized steel, lined on the
inside with
1
/
2
-in. thick fiberglass insulation,
with a 1 in. long collar for supply duct connec-
tion. NO filter installed in base unit.
2. The drain pan shall be constructed of galva-
nized steel extending the entire length and
width of the coil(s) and shall be pitched for
drainage. The inside surface of the drain pan
shall be coated with closed-cell fire-retardant
foam insulation. An extension drain pan shall
be provided for installation under factory-
provided water valves at the job site.
C. Furred-in Units with Plenum (42CE):
Base unit with factory-installed plenum section and
1-in. fiberglass throwaway filter as shown on equip-
ment drawings. The plenum shall be bottom or rear
air return, shall enclose the fan/motor assemblies,
and shall be lined with
1
/
2
-in. fiberglass insulation.
Unit shall have a removable panel to provide access
to fan/motor assemblies and unit identification label.
D. Cabinet Units (42CG):
Base unit with stamped discharge grille, removable
bottom access panel with stamped return-air grille,
filter rack and 1-in. fiberglass throwaway filter. The
panel shall be fastened with slotted head, positive-
locking quarter-turn fasteners. The cabinet shall be
coated with an Arctic White baked finish.
E. Ceiling, Furred-in with 2-in. Telescoping Ceiling
Panel (42CK):
Base unit with full galvanized upper casing, adjust-
able height, hinged return-air ceiling panel, and
1-in. fiberglass throwaway filter. Panel shall be
coated with an Arctic White baked finish.
F. Fans:
Direct-driven, double-width fan wheels with forward-
curved blades shall be statically and dynamically
balanced. Scrolls shall be constructed of galvanized
steel. Fan wheels shall be constructed of galvanized
steel.
G. Coils:
Standard base unit shall be equipped with a 3-row or
4-row coil for installation in a 2-pipe system.
Additional coil depth and circuiting shall be provided
for installation in a 4-pipe system as described in the
Special Features section. All coils shall have
1
/
2
-in.
copper tubes and aluminum fins (10 fins per inch)
spacing. Coil fins are mechanical bonded to tube
joints. The copper tubes comply with the ASTM
(American Society for Testing and Materials) B-75.
The fin thickness is 0.0045-in. and tube thickness is
0.016 inch. All coils are tested with air under water
and are suitable for design working pressures of 250
psig at 220 F. Burst tested at 300 psig.
H. Controls and Safeties:
The fan motor(s) shall be equipped with integral
automatic temperature reset for motor protection.
I. Operating Characteristics:
1. A one-coil unit installed in a 2-pipe system shall
be capable of providing heating or cooling as
determined by the operating mode of the cen-
tral water supply system.
2. A double-circuit coil unit installed in a 4-pipe
system shall be capable of providing sequenced
heating and cooling.
Guide specifications — 42C series
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