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System Fan Coil Unit
HVAC Guide Specifications — 42B
Size Range: 600 to 4000 Nominal Cfm
Carrier Model Number:
42BHC (Horizontal Fan Coil Unit)
42BVC (Vertical Fan Coil Unit)
Part 1 — General
1.01 SYSTEM DESCRIPTION
Horizontal and vertical, 2-pipe or 4-pipe, belt-
driven, galvanized casing model fan coil unit for
ducted installation above the ceiling or within
floor mounted cabinet, with full access to internal
components.
1.02 QUALITY ASSURANCE
A. Unit performance shall be rated in accordance with
ARI Standard 440-2005.
B. Unit construction shall comply with ASHRAE (latest
edition) Safety Code and NEC.
C. Unit shall be constructed in accordance with ETL
and ETL, Canada standards. Factory-installed
motors and electric heaters shall be UL approved.
D. 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.
E. 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 genera-
tion. Factory-installed motors shall be UL approved.
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 and vertical, draw-
thru type fan coil unit for ducted installation above
the ceiling or floor mounting. Unit shall be complete
with water coils, fan(s), motor, belt drive, drain pan,
and filter.
B. Casing:
Construction shall be heavy-gage galvanized steel,
lined with one-in. thick fiberglass Tuf-Skin™ II
thermal/acoustical insulation. Knockouts shall be
provided for hanging the horizontal unit, that will
accept
3
/
8
-in. threaded rod at the top, and bottom
of all unit corners. Supply and return duct connec-
tion shall be 1 in. long. Removable side panels shall
be provided for access to the fan/motor assembly. A
double-sloped drain pan shall be constructed of
stainless steel, extending under the full length and
width of the coil(s) with a
3
/
4
-in. male nominal pipe
thread stainless steel drain connection and
1
/
2
-in.
male MPT stainless secondary drain connection
(capped when not required). The outside surface of
the drain pan shall be insulated with
1
/
8
-in. closed
cell insulation.
C. Fans:
Belt-driven, double-width fan wheels shall have
forward-curved blades and be statically and dynami-
cally balanced. Fan drive shall consist of variable-
pitch motor pulley, fixed-pitch fan pulley and V-belt.
Fans and scrolls shall be of galvanized steel.
D. Coils:
Standard unit shall be equipped with a 4-row coil for
installation in a 2-pipe system and additional rows of
coil shall be provided for installation in a 4-pipe sys-
tem as described in the Options and Accessories
section. Coils shall have
1
/
2
-in. copper tubes, alumi-
num fins bonded to the tubes by mechanical expan-
sion and have a working pressure of 250 psig at
200 F. Each coil shall have a manual air vent and
sweat connections for copper tubes.
E. 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.
F. Motor(s):
Fan motors shall be open, drip-proof, single-speed,
60 Hz, 1750 rpm 1 or 3 phase, suitable for contin-
uous duty at 104 F (40 C). Single phase motors are
capacitor start, include automatic reset thermal
overload protection and are available in 115, 208,
230, or 277 volts (60 Hz). Three-phase motors are
available in 208, 230, or 460 volts (60 Hz). Motors
are resilient base mounted (except 3 and 5 hp
motors, which are rigid base mounted).
G. Options and Accessories:
1. Factory-Installed Options:
a. Coils:
1) Unit coil(s) shall be equipped with auto-
matic air vent(s).
2) Unit shall be equipped with a high-
capacity 6-row or 8-row coil for installa-
tion in a 2-pipe system.
3) For installation in a 4-pipe system, unit
shall be equipped with either a 4-row
cooling/1-row hot water heating split-
circuit coil, or a 4/2, 6/1, or 6/2 split-
circuit coil as required.
4) Unit shall be equipped with either a 4-
row DX (direct expansion) cooling coil
or a 6-row DX cooling coil as required.
5) Unit coil(s) shall be copper fin, copper
tube with stainless steel tube and sheets.
b. Filters:
1) A two-in. pleated filter shall be installed
in the unit (standard).
Guide specifications