Product data

ManualsBrandsCarrier ManualsFanAIRSTREAM 42BHC

Hydronic ceiling cassette units offer:

• 6 chilled water cooling models to

properly match job

• Optional electric heat or hot water

coil

• Wall-mounted thermostat

• Installation cost savings through

use of exisiting piping and/or wiring

• Low noise level construction

• Optional microprocessor based

controller with infrared transmitter

Features/Benefits

Ceiling cassette units make

each served area an

independent controlled

temperature zone to suit

diverse requirements.

Construction

Cases are constructed of lightweight

galvanized sheet steel with integral fan

mounting rails for added strength. Fire

resistant foam insulation (rated to

UL94 VO) is fitted internally to provide

both thermal and acoustic insulation.

The pearl-gray fascia is constructed

of high-impact polystyrene.

Chilled water coil

Units use large surface area coils posi-

tioned to optimize heat transfer and

airflow. Each coil is manufactured from

copper tubes with mechanically bond-

ed aluminum fins and is circuited from

headers to ensure low water pressure

drops.

Airstream™

42WKN08-36

Hydronic Ceiling Cassettes

50/60 Hz

to 3 Nominal Tons

(2.6 to 10.6 kW)

Product

Data

UNIT SIZES 08-12

UNIT SIZES 18-36

a42-4013

a42-4014

Summary of content (16 pages)

PAGE 1
Product Data Airstream™ 42WKN08-36 Hydronic Ceiling Cassettes 50/60 Hz 3/ 4 to 3 Nominal Tons (2.6 to 10.
PAGE 2
Features/Benefits (cont) Fan Condensate pump The backward-curved, centrifugal fans are statically and dynamically balanced for quiet operation. Fan impellers are made from either aluminum or fire-retardant plastic (UL94 VO) for lightweight and corrosion-resistant operation. Enclosed multi-speed external rotor fan motor allows good heat dissipation and increased motor efficiency. Fans come complete with thermal overload protection and sealed-for-life lubricated bearings.
PAGE 3
Physical data 42WKN UNIT SIZE NOMINAL TONS COOLING CAPACITY (Btuh) DIMENSIONS/WEIGHTS Height – Chassis/Fascia (in.) (not additive) Width – Chassis/Fascia (in.) Depth – Chassis/Fascia (in.) Weight – Chassis/Fascia (lb) CHILLED WATER COIL Type Quantity Face Area (sq ft) Nominal Airflow (cfm) High Medium Low Discharge Unit Water Volume (gal) FAN Type Quantity Diameter (in.) Horsepower per fan (Hp) CONNECTIONS (Sweat) Chilled Water Inlet, OD (in.) Chilled Water Outlet, OD (in.) Condensate, ID (in.
PAGE 4
Options and accessories ITEM Electro-Mechanical Controls Microprocessor Controls Electric Heat Hot Water Coil Hot Water Coil Freeze Protection Sensor Disconnect Switch Chilled Water/Hot Water Control Valve Fresh Air Intake Duct Collar Branch Duct Collars Spare Filters Shroud Wall-Mounted Pendant Thermostats Aquastat FACTORY-INSTALLED OPTIONS X X X X FIELD-INSTALLED ACCESSORIES X X X X X X X X X X Factory-installed options Electro-mechanical controls include an electromechanical controller with a 24-v tr
PAGE 5
a total of four knockouts are available and are arranged in pairs along two of the unit sides (two per side). NOTE: On the 08,12 size units, it is recommended that only one of the three branch duct knockouts is utilized, due to the small capacity of the unit. Spare filters accessories include either a cleanable wire mesh filter or a throwaway MERV 8 filter. Shroud is a sheet metal cover used to cover unit housing when the unit is not mounted in a drop or false ceiling.
PAGE 6
Dimensions 42WKN08 AND 42WKN12 UNIT 25 3/16 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 25 3/16 CW Inlet CW Outlet HW Coil Inlet (Optional) HW Coil Outlet (Optional) Branch Duct Opening (x3) Fresh Air Intake (x2) Pump Inspection Port Condensate Drain Control Panel Mounting Bracket 1 11/16 10 11/16 1 1/8 2 3/4 5 2 3/4 9 13/16 11 1/4 6 22 1/2 A 19 9/16 5 O 5 3/16 A 11 5/16 VIEW A-A 22 1/2 22 15/16 4 11/16 3 11/16 7 2 5/8 8 8 13/16 9 7/8 10 12 9/16 19 1/2 1 7/16 6 1/2 5 1/8 3 3/4 3 3/8 a42-4319.
PAGE 7
42WKN18 AND 42WKN20 UNIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
PAGE 8
Dimensions (cont) 42WKN33 AND 42WKN36 UNIT 37 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
PAGE 9
Selection procedure (42WKN12 unit example) I Determine job requirements. Given: Room Sensible Cooling Load . . . . . . . .8,200 Btuh Room Total Cooling Load . . . . . . . . .11,000 Btuh Entering-Air Temperature . . . . . . 80 F at 50% RH Entering Water Temperature . . . . . . . . . . . . .45 F Temperature Rise . . . . . . . . . . . . . . . . . . . . .10 F Nominal Air Delivery . . . . . . . . . . . . . . . . 350 cfm II Determine unit size and nominal cfm.
PAGE 10
Performance data CHILLED WATER UNIT COOLING CAPACITIES 42WKN UNIT SIZE ENTERING DB AIR TEMPERATURE (F) at 50% RH TC (Btuh) 72 75 80 72 75 80 72 75 80 72 75 80 72 75 80 72 75 80 5,236 6,528 10,037 8,723 10,831 14,435 13,728 17,478 24,588 14,810 18,956 26,569 23,570 29,100 41,598 27,054 33,895 47,991 08 12 18 20 33 36 DB RH SC TC — — — — CHILLED WATER ENTERING/LEAVING TEMPERATURE 40/50 F 45/55 F Flow Flow Pressure TC (Btuh) SC (Btuh) SC (Btuh) (gpm) (gpm) Drop (psi) 5,156 1.1 2.4 3,999 3,999 0.
PAGE 11
CHILLED WATER UNIT — TWO-PIPE CHANGEOVER HEATING CAPACITIES 42WKN UNIT SIZE ENTERING DB AIR TEMPERATURE (F) at 50% RH 50 60 70 50 60 70 50 60 70 50 60 70 50 60 70 50 60 70 08 12 18 20 33 36 Heating Capacity (Btuh) 28,389 25,903 23,605 33,471 30,715 27,995 60,388 55,127 49,706 65,350 59,887 54,118 99,476 91,494 82,986 114,225 105,132 95,896 HOT WATER INLET 180F/160F Flow Rate (gpm) 3.0 2.7 2.5 3.5 3.2 2.9 6.3 5.8 5.2 6.8 6.3 5.7 10.4 9.6 8.7 11.9 11.0 10.0 Pressure Drop (psi) 11.0 9.4 8.0 4.6 4.
PAGE 12
Electrical data 42WKN NOMINAL CAPACITY (Digit 4,5) PERFORMANCE (WITH ELECTRIC HEAT)* SUPPLY VOLTAGE (Digit 6) PERFORMANCE (NO ELECTRIC HEAT) FLA MCA Recommended Fuse Size FLA MCA Recommended Fuse Size — — — 0.70 0.88 15 B: 208-60-1 6.25 7.81 15 C: 230-60-1 6.87 8.59 15 0.35 0.44 15 K: 220-50-1 6.59 8.24 15 H: 277-60-1 — — — 0.29 0.36 15 — — — 1.10 1.38 15 B: 208-60-1 12.35 15.44 20 C: 230-60-1 13.59 16.99 20 0.55 0.69 15 K: 220-50-1 13.03 16.
PAGE 13
Controls Sequence of operation Electro-mechanical controls — A 24-v signal from the thermostat to terminal G supplies power to the blower motor(s), condensate pump and vane motor (if equipped). A toggle switch on the control box can be used to switch the oscillating vanes on or off. The condensate pump will run continuously, as long as the blower is energized.
PAGE 14
Guide specifications Commercial Hydronic Cassette Fan Coil HVAC Guide Specifications Size Range: ¾ to 3 Tons 7,000 to 36,000 Btuh, Nominal Cooling 15,000 to 66,000 Btuh, Nominal Heating Carrier Model Number: 42WKN Part 1 — General 1.01 SYSTEM DESCRIPTION Indoor, in-the-ceiling mounted, chilled or hot water coil, to be matched with a commercial chiller, water source heat pumps, or hot water boiler (180 F maximum). 1.02 QUALITY ASSURANCE Base unit shall be certified by UL (Underwriters Laboratories).
PAGE 15
3. Thermostat: The thermostat shall be commercial grade to control unit operation and shall provide single speed fan capability. Automatic changeover from cooling or heating shall be provided (4-pipe systems only). 4. Motorized Valve Accessory: The motorized valve shall be a two-position, spring return two or three-way valve. 5. Microprocessor Control: a.
PAGE 16
Carrier Corporation • Syracuse, New York 13221 10-14 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Pg 16 Catalog No. 04-52420017-01 Printed in U.S.A.