Carrier 42C Series Product Data page 123

Guide specifications — 42D series
Fan Coil Unit — Ducted Models
HVAC Guide Specifications — 42D
Size Range: 600 to 2000 Nominal Cfm
Carrier Model Numbers:
42DA (Ceiling Furred-in)
42DC (Ceiling Furred-in with Plenum)
42DD (Vertical with Galvanized Casing)
42DE (Ceiling with Galvanized Casing)
42DF (Ceiling Exposed Cabinet)
Part 1 — General
1.01 SYSTEM DESCRIPTION
Horizontal, 2-pipe or 4-pipe or electric heat fan coil
unit for ducted installations; horizontal furred-in or
exposed ceiling model, ceiling cabinet, or vertical
model with galvanized casing for closet or utility
room installation.
1.02 QUALITY ASSURANCE
Units shall be ETL approved, except for 42DF. All
units shall be CSA approved, including 42DF. Each
coil shall be factory tested for leakage at 350 psig air
pressure with coil submerged in water. Insulation
and adhesive shall meet NFPA 90A requirements for
flame spread and smoke generation. All equipment
wiring shall comply with NEC requirements. The
42DF model shall be tested and certified in accor-
dance with AHRI Standard 440, latest edition.
1.03 DELIVERY, STORAGE AND HANDLING
Unit shall be handled and stored in accordance with
the manufacturer's instructions.
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory assembled, horizontal or vertical blow-thru
ducted fan coil unit. Unit shall be complete with
water coil(s), fan(s), motor(s), drain pan, and
all required wiring, piping, controls and special
features. Standard insulation shall be dual density
fiberglass insulation.
B. Horizontal, Furred-in Base Unit (42DA):
1. Outside panels shall be galvanized steel, lined
on the inside with
tion and a 1 in. long collar for supply duct
connection.
2. The drain pan shall be constructed of 18-gage
galvanized steel extending the entire length and
width of coil(s) and pitched for drainage. The
inside surface of the drain pan shall be coated
with closed-cell, fire retardant foam. An exten-
sion drain pan shall be provided for installation
at the jobsite under the factory-furnished elec-
tric water valves.
C. Horizontal Base Unit with Plenum for Concealed
Installation (42DC):
Unit shall have a factory-installed, 18-gage galva-
nized steel plenum section and 1-in. throwaway fil-
ter. The plenum shall be either bottom or rear
1
/ -in. thick fiberglass insula-
2
return, lined with 1 /
2
and include a removable panel to provide access to
the fan/motor assembly.
D. Horizontal, Enclosed Unit for Concealed Installation
(42DE):
Unit shall be constructed of galvanized steel with
removable panels for access to internal compo-
nents. Units have 1 /
2
track with 1-in. throwaway filter, 1-in. supply collar,
1
and 2 / -in. return-air collar on rear of unit for duct
2
connection.
E. Horizontal Cabinet Unit for Exposed Installation
(42DF):
Unit shall be constructed of steel with arctic white
re-coatable baked enamel finish. Cabinet shall be
lined with 1 / -in. fiberglass insulation and have
2
removable bottom access panel. Unit shall include
hinged bar type return-air grille on rear of unit with
1-in. throwaway filter and integral double deflection
supply-air grille.
F. Vertical, Enclosed Unit for Closet Installation
(42DD):
Unit shall be constructed of galvanized steel with
1
/ -in. fiberglass insulation. Unit shall include front
2
return-air opening with 1-in. throwaway filter and
1-in. supply-air duct collar.
G. Fans:
Direct-driven, double-width fan wheels shall have
forward-curved blades, and be statically and dynami-
cally balanced, with scrolls and fans constructed of
galvanized steel.
H. Coils:
Standard base unit shall be equipped with a 4-row
coil for installation in a 2-pipe system. Additional
coil depth and circuiting shall be provided for instal-
lation in a 4-pipe system as described in the Special
Features section. All coils shall have
tubes and aluminum fins spacing; Coil fins are
mechanical bonded to tube joints. The copper tubes
comply with the ASTM B-75. The fin thickness is
0.0045-in. and tube thickness is 0.016-in. All coils
are tested with air under water and are suitable for
design working pressures of 250 psig at 220 F.
Burst tested at 350 psig.
I. Controls and Safeties:
Unit shall be furnished with a 3-speed, 4-position
fan switch on a wall plate for field mounting. The
fan motor(s) shall be equipped with integral, auto-
matic reset thermal overload motor protection.
J. Operating Characteristics:
A single-circuit coil unit installed in a 2-pipe system
shall be capable of providing heating or cooling as
determined by the operating mode of the central
water supply system. A double circuit coil unit
installed in a 4-pipe system shall be capable of pro-
viding sequenced heating and cooling.
-in. thick fiberglass insulation
-in. fiberglass insulation, filter
1
/ -in. copper
2
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