Carrier 42BHC, 42BVC User Manual
Product
Data
AIRSTREAM™
42BHC,BVC
System Fan Coils
600to4000Cfm
Carrier’s versatile belted fan coil units
satisfy design requirements:
• A selection of 8 sizes covers
capacities from 600 to 4000 cfm
• Choice of motors, from
eliminates oversizing
• Wide range of coil options for 2-pipe
or 4-pipe systems
• Optional DX coils with expansion
valve and distributor
• Single and three-phase electric
heat (1.0 to 40 kW)
1
/4to 5 hp,
42BHC UNIT
Features/Benefits
The 42BHC, BVC belt drive
fan coil units provide yearround comfort air
conditioning with central
station operating economy.
A variety of coil options
reduces first cost
Four, 6 or 8-row cooling coils combine
needed capacities with the most efficient heat transfer surface. For
4-pipe systems, select either of two
split-coil options. Coils consist of aluminum fins securely bonded to
OD seamless copper tubes. Each fin’s
aluminum collar ensures accurate control of the fin spacing, while completely covering the tubes to lengthen coil
life. All coils also feature manual air
vents, with automatic air vent available
as an option.
1
/2-in.
42BVC UNIT
Copyright 2005 Carrier Corporation Form 42B-1PD
Fan wheels are designed to
provide low operating costs
The forward-curved, centrifugal,
double-inlet fans are statically and
dynamically balanced at the factory to
minimize transmission of vibration
to the building structure.
The belt-driven motor (single or
three phase) has a variable-pitch pulley
which adjusts at the jobsite to accommodate limited ranges of air quantities
and pressures.
All motors (single and three phase)
are UL listed, factory wired, single
speed with thermal overload protection and are continuous duty rated.
Motors are supplied with permanently
lubricated bearings, class-B insulation
and are open drip-proof. The motor
mount has an adjustable platform for
easy belt adjustment. The motor and
its mounting are independently isolated
from the cabinet and the blower. An
adjustable pitch pulley allows cfm balancing to meet system requirements.
Motor drive packages are provided
with keyed pulleys.
Complete factory assembly
minimizes on-the-jobsite costs
and problems
Compact, lightweight units are designed
for easy mounting. Knockouts designed
to accept
3
/8-in. threaded rods are
provided on the top and bottom of each
corner of the unit One-in. duct collars
on discharge and on return are furnished standard. These integral duct
collars cut installation time and labor
expense.
Durable construction means
easy-to-maintain units
The 42BHC,BVC fan coils casings are
fabricated from heavy-gage galvanized
G90 steel, reinforced for maximum
rigidity and structural strength. Removable side panels with tool-less camlock
fasteners allow easy access for servicing interior components.
One-inch matte surface, fiberglass
thermal/acoustical insulation lines the
fan coil cabinets to prevent sweating
and to muffle sound transmission.
The stainless steel, double-sloped
condensate drain pan extends under
full coil surface to cut maintenance
costs.
Slide-in return-duct collar filter
makes it possible to remove and
replace the filter without disturbing
return air ductwork.
Table of contents
Page
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-18
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-21
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-33
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-36
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Guide Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39,40
INTERNAL FEATURES OF A 42BHC FAN COIL UNIT
2
Model number nomenclature
42BH C 08 L
42BH — Vertical Belt Drive Fan Coil Unit
42BV — Vertical Belt Drive Fan Coil Unit
C — Design
Coil —
Rows
B — 4, 2-Pipe
6, 2-Pipe
L —
H — 4/1, Same End Conn.
K — 4/2, Same End Conn.
N — 6/1, Same End Conn.
Q — 6/2, Same End Conn.
R — 8, 2-Pipe
1 — 4 With Electric Heat
Size — Nominal
—
06
600
—
08
800
—
1000
10
12 — 1200
Cfm
2 — 6 With Electric Heat
3 — 8 With Electric Heat
16 — 1600
20 — 2000
30 — 3000
40 — 4000
NOTE: Refer to current 42 Series Master Prices for
complete model definition, including motor, cfm and
total static pressure.
Physical data
UNIT SIZE 42BHC, BVC 06 08 10 12 16 20 30 40
NOMINAL CFM 600 800 1000 1200 1600 2000 3000 4000
42BHC SHIPPING WT (lb)
(no heat/ with heat)
42BVC SHIPPING WT (lb)
(no heat/ with heat)
FILTERS (2 in. pleated)
Number...Size (in.) 1...16
Face Area (sq ft) 2.8 2.8 4.2 4.2 5.5 6.3 8.9 11.7
COILS
Size (in.) 15 x 20 15 x 20 15 x 29 15 x 29 15 x 39 18 x 40 27 x 40 27 x 54
Face Area (sq ft) 2.1 2.1 3.0 3.0 4.1 4.9 7.7 10.3
Fins per inch
Coil Water Weight (approx. lb per
row of coil)
FANS
Number...Size (in.) 1...9 x 4 1...9 x 6 1...10 x 4 1...10 x 7 1...11 x 10 1...12 x 9 1...12 x 12 1...15 x 12
COPPER COIL CONN. 8 ROW
(in.) (Cooling)
COPPER COIL CONN. 4 AND 6 ROW
(in.) (Cooling)
COPPER COIL CONN. 1 AND 2 ROW
(in.) (Heating)
DRAIN CONN. SIZES (in.)
203/234 205/236 253/287 256/290 312/346 344/380 437/474 553/590
200/231 202/233 243/277 247/281 289/323 351/387 436/473 522/559
1
/2x 24 1...161/2x 24 1...181/4x 33 1...181/4x 33 2...181/4x211/22...203/4x 22 2...29 x 22 2...29 x 29
10
0.240 0.240 0.324 0.324 0.420 0.492 0.768 1.020
1OD 1
3
/4OD 1 OD 11/2OD
1
/2OD
3
/4MPT
1
/2OD
3
Options and accessories
42BHC, BVC OPTIONS AND ACCESSORIES
ITEM OPTION* ACCESSORY†
Automatic Air Vents X
Controls X
Electric Heat X
Filters X
Heating/Cooling Coils X
Insulation X
Mixing Boxes X
Motors X
Thermostats X
Valve Packages X
*Factory-installed option.
†Field-installed accessory.
The 42BHC and 42BVC fan coil units are designed to
offer maximum flexibility in an application, accessibility for
service, quiet operation and durability.
Factory-installed options
Automatic air vents — Automatic air vents have fiber-
washers, which allow air in the pipes to pass through,
automatically bleeding the system. The fiber washers eliminate the need to manually remove air from the system.
When wet, washers swell and seal the system.
Coils — Coils are available in a choice of two-pipe system
with 4-row cooling/heating or four-pipe system with 4, 6
or 8-row cooling and 1 or 2 row heating.
Reheat operation is standard. Preheat is available as an
option.
Controls
• Interlocking disconnect switch
• Heater power fusing
• 24 v Class 2 transformer (40 va)
• 8-pole control terminal strip
• Auto reset temperature limit switch
• Airflow safety switch
• Motor power fusing
• Motor control contactor
• 24 v condensate overflow switch
Electric heat — Total electric heat eliminates the require-
ment for a boiler. Heating and/or cooling may be available
on an individual basis throughout the year. Resistance
electric heat is available from 1.0 kW to 40.0 kW (refer to
electric heater data table for availability per unit) with
single-stage or multiple-stage, single power source.
Voltages:
• 115 v, 208 v, 230 v and 277 v single-phase 60 Hz
• 208 v, 230 v and 480 v three-phase 60 Hz
Electric heat is available with the following staging options
(3-phase staging is balanced).
• 1 to 12 kW 1 stage only — single phase
• 3 to 12 kW 1 or 2 stage only — single phase
• 1 to 40 kW 1 stage only — 3 phase
• 4 to 40 kW 1 or 2 stage only — 3 phase
• 12 to 40 kW 1, 2, or 3 stage — 3 phase
Heater coils are constructed of high-grade resistance
wire that is supported by ceramic insulators on plated steel
brackets. These heat elements are suspended directly in
front of the outlet after the blower and the coil. High limit
thermal cutouts protect the heater in the event of air
failure.
Filters — Two in. pleated filters are standard. One-in.
pleated, two 1-in. throwaway, or 2-in. MERV (minimum
efficiency reporting value) 11 filters with 2-in. pleated
pre-filter are available. The 2-in. MERV 11 filters with 2-in.
pleated pre-filter include a filter rack.
Insulation — Tuf-Skin™ II (1-in. thick) insulation is
standard. Units are available with ¾-in. closed cell, 1-in.
Tuf-Skin Rx™ edge sealed, or 1-in. foil-faced insulation.
Motors — A wide selection of standard motors provides
efficient operation in ducted applications with excellent
performance with up to 2 inches of total static pressure.
Available motor options:
• 115 v, 208 v, 230 v and 277 v single-phase 60 Hz
• 208 v, 230 v and 460 v three-phase 60 Hz
• Open drip-proof motors
• External junction box
Field-installed accessories
Mixing boxes — Mixing boxes can be used when outside
air is required for ventilation. Preassembled at the factory
and shipped separately with base rails for field installation,
mixing boxes include a linkage kit consisting of two crank
arms, 2 swivels and either a 25 in. long (for sizes 06-16) or
a 84 in. long (for sizes 20-40) rod for field installation of an
actuator.
4
Thermostats — Three thermostats are available for field
installation:
Honeywell T834C manual changeover, single-stage heat
thermostat features:
• off-cool-heat system switch
• on-auto fan mode switch
• single-stage electric heat
• outside air signal
Honeywell T8500 digital, automatic/manual changeover,
2-stage heat thermostat features:
• digital display of temperatures and all functions
• off-cool-heat-auto system mode buttons
• single speed fan operation
• on-auto fan mode button
• single or two stage electric heat signal
• outside air signal
• remote temperature sensor available
Sunne T170 single-stage heat, 2-pipe heat/cool auto
changeover thermostat features:
• digital display of ambient temperature and operating
mode
• single fan speed operation, power and operating mode
buttons
• continuous fan operation, cycling water control valve
• 4-pipe ACO/MCO (automatic changeover/manual
changeover) with “on-auto” fan mode button
• one or 2 stage electric heat signal available
• purge cycle and temperature sensor for 2-pipe cold
water/hot water systems
• programmable operating range, dead band, digital display, temperature set-back
THERMOSTAT FUNCTIONS
SYSTEM FUNCTION CHANGEOVER
2Pipe HW-Heat Only ACO — XX
2 Pipe CW-Cool Only ACO — XX
2Pipe
2Pipe
2Pipe
4Pipe
ACO — Automatic Changeover
Aux — Auxiliary
CW — Chilled Water
HW — Hot Water
MCO — Manual Changeover
CW/HW
Heat/Cool
CW/HW
Heat/Cool with
Aux. Electric Heat
CW-Cooling with
To t al Electric Heat
CW/HW
Heat/Cool
LEGEND
MCO ——X
ACO ——X
MCO ——X
ACO ——X
MCO X X X
ACO — XX
MCO X X X
ACO — XX
THERMOSTATS
Honeywell
T834C
Honeywell
T8500
Sunne
T170
Valve packages — Valve packages are factory assembled
for field installation. Motorized valves (24 v) can be operated with power on with spring return or power off/power
on.
It is recommended that basic motor controls are ordered
when valve packages are ordered.
5
Base unit dimensions
42BHC FAN COIL BASE UNIT (NO CONTROLS)
UNIT
42BHC
06 9x 4 36
08 9x 6 363/
10 10 x 4 373/
12 10 x 7 373/
16 11 x 10 3715/
20 12 x 9 40
30 12 x 12 403/
40 15 x 12 439/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
Fan Size Depth Width Height
3
/
2811/
16
2811/
16
371/
4
371/
4
471/
16
3
/
481/
8
481/
8
621/
16
1
/4in.).
16
16
16
16
16
16
16
16
181/
2
181/
2
201/
4
201/
4
201/
4
223/
4
31 157/
31 167/
DIMENSIONS (in.)
Supply Duct Return Duct Mounting Holes
AB CDEF J K
71/
89/
71/
915/161111/
135/
121/
109/
8
109/
16
1111/
2
1211/
16
133/
2
133/
8
161/
16
137/
16
137/
16
137/
16
137/
16
1613/
16
173/
4
161/
4
2213/
16
8
8
8
8
16
4
16
16
11/8241/
11/8241/
11/8331/
11/8331/
11/8431/
11/8441/
61/8441/
51/8581/
167/
16
167/
16
183/
16
183/
16
183/
16
2011/
16
2815/
16
2815/
16
273/
16
273/
16
363/
16
363/
16
463/
16
473/
16
473/
16
613/
16
351/
16
16
16
16
16
16
16
16
351/
3613/
3613/
37
397/
397/
425/
4
4
16
16
8
change without notice.
3. Right hand shown, left hand opposite.
4. Hanger rods, which are field-supplied, are shown for reference only.
16
16
6
42BHC FAN COIL WITH MOTOR CONTROL OPTION
UNIT
42BHC
06 9x 4 36
08 9x 6 363/
10 10 x 4 373/
12 10 x 7 373/
16 11 x 10 3715/
20 12 x 9 40
30 12 x 12 403/
40 15 x 12 439/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
Fan Size Depth Width Height
3
/
2811/
16
2811/
16
371/
4
371/
4
471/
16
3
/
481/
8
481/
8
621/
16
1
/4in.).
16
16
16
16
16
16
16
16
181/
2
181/
2
201/
4
201/
4
201/
4
223/
4
31 157/
31 167/
DIMENSIONS (in.)
Supply Duct Return Duct Mounting Holes
AB CDEF J K
71/
89/
71/
915/
135/
121/
109/
8
109/
16
1111/
2
1111/
16
1211/
16
133/
2
133/
8
161/
16
137/
16
137/
16
137/
16
137/
16
1613/
16
173/
4
161/
4
2213/
16
8
8
8
8
16
4
16
16
11/8241/
11/8241/
11/8331/
11/8331/
11/8431/
11/8441/
61/8441/
51/8581/
167/
16
167/
16
183/
16
183/
16
183/
16
2011/
16
2815/
16
2815/
16
273/
16
273/
16
363/
16
363/
16
463/
16
473/
16
473/
16
613/
16
351/
16
16
16
16
16
16
16
16
351/
3613/
3613/
37
397/
397/
425/
4
4
16
16
16
16
8
change without notice.
3. Right hand shown, left hand opposite.
4. Hanger rods, which are field-supplied, are shown for reference only.
7
Base unit dimensions (cont)
42BHC FAN COIL WITH ELECTRIC HEAT OPTION
UNIT
42BHC
06 9x 4 36
08 9x 6 363/
10 10 x 4 373/
12 10 x 7 373/
16 11 x 10 3715/
20 12 x 9 40
30 12 x 12 403/
40 15 x 12 439/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
change without notice.
Fan Size Depth Width Height
3
/
2811/
16
2811/
16
371/
4
371/
4
471/
16
3
/
481/
8
481/
8
621/
16
1
/4in.).
16
16
16
16
16
16
16
16
181/
181/
201/
201/
201/
223/
31 157/
31 167/
2
2
4
4
4
4
DIMENSIONS (in.)
Supply Duct Return Duct Mounting Holes
AB CDEF J K
71/
89/
71/
915/
135/
121/
109/
8
109/
16
1111/
2
1111/
16
1211/
16
133/
2
133/
8
161/
16
137/
16
137/
16
137/
16
137/
16
1613/
16
173/
4
161/
4
2213/
16
8
8
8
8
16
4
16
16
11/8241/
11/8241/
11/8331/
11/8331/
11/8431/
11/8441/
61/8441/
51/8581/
167/
16
167/
16
183/
16
183/
16
183/
16
2011/
16
2815/
16
2815/
16
273/
16
273/
16
363/
16
363/
16
463/
16
473/
16
473/
16
613/
16
351/
16
16
16
16
16
16
16
16
351/
3613/
3613/
37
397/
397/
425/
4
4
16
16
8
3. Right hand shown, left hand opposite.
4. Hanger rods, which are field-supplied, are shown for reference only.
16
16
8
42BVC FAN COIL BASE UNIT (NO CONTROLS)
UNIT
42BVC
06 9x 4 20 28
08 9x 6 20 281/
10 10 x 4 22 371/
12 10 x 7 22 371/
16 11 x 10 22 471/
20 12 x 9 24 481/
30 12 x 12 28 481/
40 15 x 12 28 621/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
change without notice.
Fan Size Depth Width Height
1
/
16
16
16
16
16
16
16
16
1
/4in.).
DIMENSIONS (in.)
361/
2
361/
2
393/
8
393/
8
393/
451/
543/
575/
8
8
16
8
135/
121/
157/
167/
Supply Duct Return Duct
AB CEF
71/
89/
71/
915/
8
16
2
16
16
2
8
16
109/
109/
1111/
1111/
1211/
133/
133/
161/
16
16
16
16
16
4
4
16
33/
33/
51/
51/
167/
1713/
161/
227/
4
4
2
2
8
16
8
8
241/
241/
331/
331/
431/
441/
441/
581/
167/
16
16
16
16
16
16
16
16
167/
183/
183/
183/
2011/
2815/
2815/
16
16
16
16
16
3. Right hand shown, left hand opposite.
4. Hanger rods, which are field-supplied, are shown for reference only.
16
16
16
9
Base unit dimensions (cont)
42BVC FAN COIL WITH MOTOR CONTROL OPTION
UNIT
42BVC
06 9x 4 20 28
08 9x 6 20 281/
10 10 x 4 22 371/
12 10 x 7 22 371/
16 11 x 10 22 471/
20 12 x 9 24 481/
30 12 x 12 28 481/
40 15 x 12 28 621/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
NOTES:
change without notice.
1. All dimensions are in inches (±
3. Right hand shown, left hand opposite.
2. Any modifications to product specifications by any person are
4. Hanger rods, which are field-supplied, are shown for reference only.
subject to acceptance of the factory. Product specifications are
subject to change without notice.
3. RH shown, LH opposite.
Fan Size Depth Width Height
1
/
16
16
16
16
16
16
16
16
1
/4in.).
1
/4in.).
DIMENSIONS (in.)
361/
2
361/
2
393/
8
393/
8
393/
451/
543/
575/
8
8
16
8
135/
121/
157/
167/
Supply Duct Return Duct
AB CEF
71/
89/
71/
915/
8
16
2
16
16
2
8
16
109/
109/
1111/
1111/
1211/
133/
133/
161/
16
16
16
16
16
4
4
16
33/
33/
51/
51/
167/
1713/
161/
227/
4
4
2
2
8
8
8
241/
16
241/
16
331/
16
331/
16
431/
16
441/
16
441/
581/
16
16
16
4. Hanger rods, which are field-supplied, are shown for reference
only.
167/
167/
183/
183/
183/
2011/
2815/
2815/
16
16
16
16
16
16
16
16
10
42BVC FAN COIL WITH ELECTRIC HEAT OPTION
UNIT
42BVC
06 9x 4 20 28
08 9x 6 20 281/
10 10 x 4 22 371/
12 10 x 7 22 371/
16 11 x 10 22 471/
20 12 x 9 24 481/
30 12 x 12 28 481/
40 15 x 12 28 621/
NOTES:
1. All dimensions are in inches (±
2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to
Fan Size Depth Width Height
1
/
16
16
16
16
16
16
16
16
1
/4in.).
DIMENSIONS (in.)
361/
2
361/
2
393/
8
393/
8
393/
451/
543/
575/
8
8
16
8
135/
121/
157/
167/
Supply Duct Return Duct
AB CEF
71/
89/
71/
915/
8
16
2
16
16
2
8
16
109/
109/
1111/
1111/
1211/
133/
133/
161/
16
16
16
16
16
4
4
16
33/
33/
51/
51/
167/
1713/
161/
227/
4
4
2
2
8
16
8
8
241/
241/
331/
331/
431/
441/
441/
581/
16
16
16
16
16
16
16
16
167/
167/
183/
183/
183/
2011/
2815/
2815/
change without notice.
3. Right hand shown, left hand opposite.
4. Hanger rods, which are field-supplied, are shown for reference only.
16
16
16
16
16
16
16
16
11
Base unit dimensions (cont)
42BHC UNIT CORNER WEIGHTS (lb)
1
3
4
RIGHT HAND UNIT
UNIT
42BHC
NOTE: Unit weights (shown in pounds) ±10%, are based on the 8-row coil and 1 Hp motor.
CONFIGURATION
06
08
10
12
16
20
30
40
No Heat 50 55 47 51 55 50 51 47 203
With Heat 50 58 59 67 58 50 67 59 234
No Heat 51 55 47 52 55 51 52 47 205
With Heat 50 59 59 68 59 50 68 59 236
No Heat 63 71 55 63 71 63 63 55 253
With Heat 62 76 68 81 76 62 81 68 287
No Heat 64 72 56 64 72 64 64 56 256
With Heat 63 76 68 82 76 63 82 68 290
No Heat 80 87 69 76 87 80 76 69 312
With Heat 79 91 82 95 91 79 95 82 346
No Heat 90 98 74 82 98 90 82 74 344
With Heat 90 102 88 100 102 90 100 88 380
No Heat 118 127 92 100 127 118 100 92 437
With Heat 118 131 106 119 131 118 119 106 474
No Heat 155 162 114 122 162 155 122 114 553
With Heat 155 166 129 140 166 155 140 129 590
2
RIGHT-HAND UNITS LEFT-HAND UNITS
12341234
1
3
LEFT HAND UNIT
2
4
TOTAL
WEIGHT
12
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