Guide Specifications - 42S Series - Carrier 42C Series Product Data

Guide specifications — 42S series
Fan Coil Unit — Vertical Stack Models
HVAC Guide Specifications — 42S
Size Range: 300 to 1200 Nominal Cfm
Carrier Model Numbers:
42SGA (Furred-in)
42SHA (Cabinet)
42SJA (Furred-in, Back-to-Back)
Part 1 — General
1.01 SYSTEM DESCRIPTION
Stack fan coil units, 2-pipe, 4-pipe or electric heat
for furred-in or exposed cabinets that are floor
mounted in multi-story buildings.
1.02 QUALITY ASSURANCE
Units shall be tested and certified in accordance with
ARI standard 440, latest edition. All units shall be
UL and CSA approved. 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 com-
ply with NEC requirements.
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, stack fan coil units. Units are
complete with water coil(s), fan(s), motor(s), drain
pan, and all required wiring, piping, controls, and
special features.
B. Cabinet Stack Unit (42SH):
Outside panels are made of 18-gage galvanized steel
coated with baked-on enamel finish and are fabri-
cated with no exposed fasteners. The interior sur-
faces shall be lined with ½-in. thick fiberglass
Tuf-Skin™ II insulation. The standard cabinet unit
has factory-installed double deflection discharge
grille(s) and stamped supply grille. Controls are fac-
tory wired and mounted in small access panel at
front of unit.
C. Furred-In Stack Unit (42SG):
The unit shall be constructed of 18-gage galvanized
steel frame and 18-gage galvanized steel back panel.
The fan coil is open or enclosed for furred-in instal-
lation. These units are designed to have the wall-
board applied directly to the unit surface and all
openings have standard ½-in. thick fiberglass Tuf-
Skin II insulation. Units have double deflection alu-
minum discharge grille(s) and painted, stamped
(standard) or bar-type aluminum (optional) return-air
grille panel. Removable return-air grille provides
access to all internal piping and wiring. Controls are
provided with a quick disconnect plug for field-
mounting on front of unit.
D. Back-To-Back Furred-In Stack Units (42SJ):
The open unit shall be constructed of 18-gage galva-
nized steel frame and 18-gage galvanized steel back
panel. These units are similar to the 42SG but are
actually two completely separate units contained in
one cabinet that share a common set of risers.
These units are designed to have the wallboard
directly applied to the unit surface and openings
have standard ½-in. drywall flanges. The interior
surfaces shall be lined with ½-in. thick fiberglass Tuf-
Skin II insulation. Units have double deflection alu-
minum supply grille(s) and painted, stamped (stan-
dard) or bar-type aluminum (optional) return-air
grille panel. Removable return-air grille provides
access to all internal piping and wiring. Controls are
provided with a quick disconnect plug for field-
mounting on front of unit.
E. Drain Pan:
Drain pan shall be formed of 18-gage steel and shall
be coated inside with fire-retardant closed-cell foam
insulation. Water never touches the metal pan elimi-
nating the possibility of corrosion. The drain is fac-
tory piped to the drain riser that has a removable
"P-trap" allowing easy cleaning.
F. Filter:
A filter track complete with 1-in. fiberglass throw-
away filter shall be installed in the unit. Optional per-
manent filters are available.
G. Fan:
1. Centrifugal fan shall be directly-driven by an
electric motor.
2. Fan wheel shall be double-width type with
forward-curved blades and shall be statically and
dynamically balanced.
3. Fan wheel and scroll shall be constructed of gal-
vanized steel.
H. Coil:
1. Standard base unit shall be equipped with a
3-row for installation in a 2-pipe system. Addi-
tional coil depth and circuiting shall be provided
for installation in a 4-pipe system as described
in the Special Features section.
2. All coils shall have ½-in. copper tubes and alu-
minum 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.
3. Coil shall be equipped with a manual air vent
and shall be piped to supply and return
risers with valves as specified on the equipment
drawings.
4. Piping between coil and risers shall include
loops to compensate for maximum riser expan-
sion and contraction of 1
1
/ inches.
2
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