Guide specifications
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
1.01SYSTEM 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.
1.02QUALITY 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.
1.03DELIVERY, STORAGE AND HANDLING
Unit shall be handled and stored in accordance with the manufacturer’s instructions.
Part 2 — Products
2.01EQUIPMENT
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).
