Carrier AIRSTREAM 42BHE06 Dimensions and installation guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53420028-01 Printed in U.S.A. Form No. 42B-6SI Pg 1 1-24 Replaces: 42B-5SI
Installation, Start-Up and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 1 — Unpack and Inspect Unit . . . . . . . . . . . . . . 2
Step 2 — Protect Unit from Damage . . . . . . . . . . . . . 2
Step 3 — Prepare Jobsite . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 — Prepare Unit . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 5 — Position Unit . . . . . . . . . . . . . . . . . . . . . . . . 9
• TOTAL WEIGHT UNIT CORRECTION FACTOR (LB)
Step 6 — Make Piping Connections . . . . . . . . . . . . 11
•DRAIN
• WATER SUPPLY/RETURN CONNECTIONS
• WATER TREATMENT
• HYDROSTATIC TEST
• INSULATION
• MAXIMUM EXTERNAL STATIC PRESSURES
Step 7 — Make Electrical Connections . . . . . . . . . . 15
• SERVICE SWITCHES:
Step 8 — Make Duct Connections . . . . . . . . . . . . . 16
Step 9 — Install Mixing Box . . . . . . . . . . . . . . . . . . . 16
Step 10 — Make Final Preparations . . . . . . . . . . . . 18
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Air System Balancing . . . . . . . . . . . . . . . . . . . . . . . . 19
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Clean Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Check Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fan and Motor Bearings . . . . . . . . . . . . . . . . . . . . . . 19
Align Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Adjust Fan Belt Tension . . . . . . . . . . . . . . . . . . . . . . 20
Clean Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean or Replace Air Filters . . . . . . . . . . . . . . . . . . . 20
Recommended Maintenance . . . . . . . . . . . . . . . . . . 20
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 20
Excessive Condensation on Fan Coil Unit Parts . . 20
Motor Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Air-handling equipment is designed to provide safe and reliable
service when operated within design specifications. To avoid inju-
ry to personnel and damage to property or equipment, use good
judgment and follow safe practices as outlined below when in-
stalling and operating this equipment.
See Fig. 1 Proposition 65 warning label. Fig. 1 — Proposition 65 Warning Label
DANGER
NEVER REACH INTO a unit while the fan is running.
LOCK OPEN AND TAG the fan motor power disconnect
switch before working on unit. In addition, remove the fuses
and take them with you after noting this on tag.
DISCONNECT ALL POWER before attempting any
installation or service. More than one power source may be
supplied to a unit. Power to remote mounted control devices
may not be supplied through the unit.
CHECK THE WEIGHT of assembly and components to be
sure that rigging equipment can handle them safely.
NEVER PRESSURIZE a coil with a non-liquid for leak
testing. A dangerous burst may occur.
DO NOT STEAM-CLEAN coils until you are sure all
personnel are clear of the area.
Failure to follow these warnings will result in severe personal
injury or death.
IMPORTANT: Children should be supervised to ensure that they
do not play with the appliance.
This product can expose you to chemicals
including Acrylamide, which is known to the
State of California to cause cancer and birth
defects or other reproductive harm.
For more information, go to
www.P65Warnings.ca.gov
WARNING
!
!
!
AVERTISSEMENT
ADVERTENCIA
Ce produit peut vous exposer à des produits
chimiques, y compris l’acrylamide, qui est
connu dans l’État de Californie pour causer
le cancer et des malformations congénitales
ou d’autres problèmes de reproduction. Pour
de plus amples informations, prière de
consulter www.P65Warnings.ca.gov
Este producto puede exponerlo a productos
químicos como la acrilamida, que en el
estado de California es causante de cáncer
y defects de nacimiento u otros daños
reproductivos. Para mayor información, visite
www.P65Warnings.ca.gov
343839-101 REV.A
AirStream™
42BHE,BVE06-40
System Fan Coil Air Conditioners

2
INTRODUCTION
The following contains general installation instructions for the
42BHE, BVE fan coil units. See Fig. 2 for components. Refer to
the unit wiring diagram installed on the blower housing or specific
manufacturer literature for any other type of factory-mounted
controls.
See drawings for unit configurations, dimensions, clearances, and
pipe connections. Refer to unit wiring label for all electrical con-
nections. Follow NEC (National Electrical Code) and local codes.
INSTALLATION
Step 1 — Unpack and Inspect Unit
Remove shipping wraps from unit and check shipment against
shipping list. Check for concealed shipping damage. If ship-
ment is damaged or incomplete, file claim with transportation
company and contact your local Carrier representative
immediately.
Step 2 — Protect Unit from Damage
To maintain warranty, protect unit against adverse weather condi-
tions, theft or vandalism on the jobsite.
The described equipment IS NOT suitable for outdoor installa-
tions. The equipment should never be stored or installed where it
may be subjected to a hostile environment such as rain, snow, or
extreme temperatures.
Step 3 — Prepare Jobsite
To save time and to reduce the possibility of costly errors, set up a
complete sample installation in a typical room at jobsite. Check all
critical dimensions such as pipe, wire and duct connection require-
ments. Refer to job drawings and product dimension drawings as
required. Instruct all trades in the appropriate part of the installa-
tion. For unit component identification, refer to Fig. 2. For unit di-
mensions, refer to Fig. 3-5 for 42BHE units. Refer to Fig. 6-8 for
42BVE units.
Fig. 2 — Component Identification (42BHE Units Shown)
a42-3984

3
Fig. 3 — Unit Dimensions — 42BHE Fan Coil Base Unit (No Controls)
Drawing is provided for reference only.
Dimensions may vary with options ordered.
NOTES:
1. Unit measurements on drawings and in tables are shown in inches and (millimeters).
2. Right hand shown, left hand opposite.
3. All dimensions are in inches ±1/4 in.(6 mm).
4. Product specifications are subject to change without notice.
5. Right hand shown, left hand opposite.
6. Allow adequate spacing for maneuverability around unit to allow service through recommended access area.
7. “C” dimension is measured from coil side of unit.
8. Mixing Box option will vary return duct dimensions, refer to mixing box details, Fig. 19 page 18.
UNIT
42BHE
DIMENSIONS — in. (mm)
M
Fan
Size Depth Width Height Supply Duct Return Duct Mounting Holes
ABCDEFGJK
06 9 x 4 36
(914)
28
(711)
19-3/4
(502)
7-1/8
(181)
10-1/2
(267)
14-1/2
(368)
2-1/4
(57)
24-1/4
(616)
14
(356)
2-3/4
(70)
27-1/4
(686)
35-1/4
(895)
2
(51)
08 9 x 6 36
(914)
28
(711)
19-3/4
(502)
8-1/2
(216)
10-1/2
(267)
14
(356)
2-1/4
(57)
24-1/4
(616)
14
(356)
2-3/4
(70)
27-1/4
(686)
35-1/4
(895)
2
(51)
10 10 x 4 37-1/2
(953)
37
(940)
21-1/2
(546)
7-1/8
(181)
11-5/8
(295)
15-1/4
(387)
2-1/4
(57)
33-1/4
(845)
15-3/4
(401)
2-7/8
(73)
36-1/4
(921)
37
(940)
2
(51)
12 10 x 7 37-1/2
(953)
37
(940)
21-1/2
(546)
10
(254)
11-5/8
(295)
14
(356)
2-1/4
(57)
33-1/4
(845)
15-3/4
(401)
2-7/8
(73)
36-1/4
(921)
37
(940)
2
(51)
16 11 x 10 37-3/4
(959)
47
(1194)
21-1/2
(546)
13-3/8
(340)
12-3/4
(324)
16-3/4
(425)
2-1/4
(57)
43-7/8
(1115)
15-3/4
(401)
2-7/8
(73)
46-1/4
(1175)
37
(940)
1-1/2
(38)
20 12 x 9 40-1/4
(1022)
48
(1219)
24
(610)
12-1/2
(216)
13-3/4
(349)
17-3/4
(451)
2-1/4
(57)
44-1/4
(1124)
18
(457)
2-7/8
(73)
47-1/4
(1200)
39-1/2
(1033)
2
(51)
30 12 x 12 40-1/4
(1022)
48
(1219)
32-1/4
(819)
15-7/8
(403)
13-3/4
(349)
16
(406)
7-1/4
(184)
44-1/4
(1124)
26-1/2
(673)
1-1/4
(32)
47-1/4
(1200)
39-1/2
(1033)
2
(51)
40 15 x 12 43-1/2
(1105)
62
(1575)
32-1/4
(819)
16-3/8
(416)
16-1/8
(410)
22-3/4
(578)
6-1/4
(159)
58-1/4
(1480)
26-1/2
(673)
1-1/4
(32)
61-1/4
(1556)
42-1/2
(1080)
2
(51)

4
Fig. 4 — Unit Dimensions — 42BHE Fan Coil Base Unit with Motor Control Option
Drawing is provided for reference only.
Dimensions may vary with options ordered.
NOTES:
1. Right hand shown, Left hand opposite.
2. All dimensions are +/- 1/4” (+/- 6 mm).
3. Drain pan removal is on the piping side of the unit.
4. Allow adequate spacing or maneuverability of unit to allow service through recommended access area.
5. Dimensions in parenthesis are in millimeters.
6. “C” dimension is measured from coil side of unit.
7. Product specifications are subject to change without notice.
8. Mixing Box option will vary return duct dimensions, refer to mixing box details, Fig. 19 page 18.
UNIT
42BHE
DIMENSIONS — in. (mm)
Supply Duct M
AB C D
06 8-7/8 (225) 10-1/2 (267) 14-1/2 (368) 2-1/4 (57) 2 (51)
08 8-7/8 (225) 10-1/2 (267) 14 (356) 2-1/4 (57) 2 (51)
10 10-3/8 (264) 11-5/8 (295) 15-1/4 (387) 2-1/4 (57) 2 (51)
12 10-3/8 (264) 11-5/8 (295) 14 (356) 2-1/4 (57) 2 (51)
16 13-7/8 (352) 12-3/4 (324) 16-3/4 (425) 2-1/4 (57) 1-1/2 (38)
20 13 (330) 13-3/4 (349) 17-3/4 (451) 2-1/4 (57) 2 (51)
30 16-1/4 (413) 13-3/4 (349) 16 (406) 7-1/4 (184) 2 (51)
40 16-3/4 (425) 16-1/8 (410) 22-3/4 (578) 6-1/4 (159) 2 (51)

5
Fig. 5 — Unit Dimensions — 42BHE Fan Coil Base Unit with Electric Heat Option
Drawing is provided for reference only.
Dimensions may vary with options ordered.
NOTES:
1. Right hand shown, Left hand opposite.
2. All dimensions are +/- 1/4” (+/- 6 mm).
3. Drain pan removal is on the piping side of the unit.
4. Allow adequate spacing or maneuverability of unit to allow service through recommended access area.
5. Dimensions in parenthesis are in millimeters.
6. “C” dimension is measured from coil side of unit.
7. Product specifications are subject to change without notice.
8. Mixing Box option will vary return duct dimensions, refer to mixing box details, Fig. 19 page 18.
UNIT
42BHE
DIMENSIONS — in. (mm)
Supply Duct M
AB C D
06 8-7/8 (225) 10-1/2 (267) 14-1/2 (368) 2-1/4 (57) 2 (51)
08 8-7/8 (225) 10-1/2 (267) 14 (356) 2-1/4 (57) 2 (51)
10 10-3/8 (264) 11-5/8 (295) 15-1/4 (387) 2-1/4 (57) 2 (51)
12 10-3/8 (264) 11-5/8 (295) 14 (356) 2-1/4 (57) 2 (51)
16 13-7/8 (352) 12-3/4 (324) 16-3/4 (425) 2-1/4 (57) 1-1/2 (38)
20 13 (330) 13-3/4 (349) 17-3/4 (451) 2-1/4 (57) 2 (51)
30 16-1/4 (413) 13-3/4 (349) 16 (406) 7-1/4 (184) 2 (51)
40 16-3/4 (425) 16-1/8 (410) 22-3/4 (578) 6-1/4 (159) 2 (51)

6
Fig. 6 — Unit Dimensions — 42BVE Fan Coil Base Unit (No Controls)
Drawing is provided for reference only.
Dimensions may vary with options ordered.
NOTES:
1. Right hand shown, Left hand opposite.
2. All dimensions are +/- 1/4” (+/- 6 mm).
3. Drain pan removal is on the piping side of the unit.
4. Allow adequate spacing or maneuverability of unit to allow service through recommended access area.
5. Dimensions in parenthesis are in millimeters.
6. “C” dimension is measured from coil side of unit.
7. Product specifications are subject to change without notice.
8. Mixing Box option will vary return duct dimensions, refer to mixing box details, Fig. 19 page 18.
UNIT
42BVE
DIMENSIONS — in. (mm)
Fan Size Depth Width Height Supply Duct Return Duct
AB CEF
06 9 x 4 20
(508)
28
(711)
36-1/2
(927)
7-1/8
(181)
10-1/2
(267)
16-3/4
(425)
24
(610)
16-1/2
(419)
08 9 x 6 20
(508)
28
(711)
36-1/2
(927)
8-1/2
(216)
10-1/2
(267)
15-1/4
(387)
24
(610)
16-1/2
(419)
10 10 x 4 22
(559)
37
(940)
39-3/8
(1000)
7-1/8
(181)
11-9/16
(294)
24-1/2
(622)
33
(838)
18-1/4
(464)
12 10 x 7 22
(559)
37
(940)
39-3/8
(1000)
9-15/16
(252)
11-9/16
(294)
21-1/2
(546)
33
(838)
18-1/4
(464)
16 11 x 10 22
(559)
47
(1194)
39-3/8
(1000)
13-3/8
(340)
12-3/4
(324)
16-3/4
(425)
43
(1092)
18-1/4
(464)
20 12 x 9 24
(610)
48
(1219)
45-1/8
(1146)
12-1/2
(318)
13-3/4
(349)
17-3/4
(451)
44
(1118)
20-3/4
(527)
30 12 x 12 28
(711)
48
(1219)
54-3/16
(1376)
15-7/8
(403)
13-3/4
(349)
16
(406)
44
(1118)
29
(737)
40 15 x 12 28
(711)
62
(1575)
57-5/8
(1464)
16-7/16
(418)
16-1/16
(408)
22-3/4
(578)
58
(1473)
29
(737)

7
Fig. 7 — Unit Dimensions — 42BVE Fan Coil Base Unit with Motor Control Option
Drawing is provided for reference only.
Dimensions may vary with options ordered.
NOTES:
1. Right hand shown, Left hand opposite.
2. All dimensions are +/- 1/4” (+/- 6 mm).
3. Drain pan removal is on the piping side of the unit.
4. Allow adequate spacing or maneuverability of unit to allow service through recommended access area.
5. Dimensions in parenthesis are in millimeters.
6. “C” dimension is measured from coil side of unit.
7. Product specifications are subject to change without notice.
UNIT
42BVE
DIMENSIONS — in. (mm)
Fan Size Depth Width Height Supply Duct Return Duct
ABCEF
06 9 x 4 20
(508)
28
(711)
36-1/2
(927) 7-1/8 (181) 10-1/2 (267) 16-3/4 (425) 24 (610)
16-1/2
(419)
08 9 x 6 20
(508)
28
(711)
36-1/2
(927) 8-1/2 (216) 10-1/2 (267) 15-1/4 (387) 24
(610)
16-1/2
(419)
10 10 x 4 22
(559)
37
(940)
39-3/8
(1000) 7-1/2 (191) 11-9/16 (294) 24-1/2 (622) 33 (838)
18-1/4
(464)
12 10 x 7 22
(559)
37
(940)
39-3/8
(1000) 9-15/16 (252) 11-9/16 (294) 21-1/2 (546) 33 (838)
18-1/4
(464)
16 11 x 10 22
(559)
47
(1194)
39-3/8
(1000) 13-3/8 (340) 12-3/4 (324) 16-3/4 (425) 43
(1092)
18-1/4
(464)
20 12 x 9 24
(610)
48
(1219)
45-1/8
(1146) 12-1/2 (216) 13-3/4 (349) 17-3/4 (451) 44 (1118)
20-3/4
(527)
30 12 x 12 28
(711)
48
(1219)
54-3/16
(1376) 15-7/8 (403) 13-3/4 (349) 16 (406) 44
(1118)
29
(737)
40 15 x 12 28
(711)
62
(1575)
57-5/8
(1464) 16-7/16 (418) 16-1/16 (408) 22-3/4 (578) 58 (1473)
29
(737)

8
Fig. 8 — Unit Dimensions — 42BVE Fan Coil Base Unit with Electric Heat Option
NOTES:
1. Right hand shown, Left hand opposite.
2. All dimensions are +/- 1/4” (+/- 6 mm).
3. Drain pan removal is on the piping side of the unit.
4. Allow adequate spacing or maneuverability of unit to allow service through recommended access area.
5. Dimensions in parenthesis are in millimeters.
6. “C” dimension is measured from coil side of unit.
7. Product specifications are subject to change without notice.
UNIT
42BVE
DIMENSIONS — in. (mm)
Fan Size Depth Width Height Supply Duct Return Duct
ABC E F
06 9 x 4 20
(508)
28
(711)
36-1/2
(927) 8-7/8 (225) 10-7/8 (276) 16-3/4 (425) 24
(610)
16-1/2
(419)
08 9 x 6 20
(508)
28
(711)
36-1/2
(927) 8-7/8 (225) 10-7/8 (276) 15-1/4 (387) 24 (610)
16-1/2
(419)
10 10 x 4 22
(559)
37
(940)
39-3/8
(1000) 10-3/8 (264) 12 (305) 24-1/2 (622) 33 (838)
18-1/4
(464)
12 10 x 7 22
(559)
37
(940)
39-3/8
(1000) 10-3/8 (264) 12 (305) 21-1/2 (546) 33 (838)
18-1/4
(464)
16 11 x 10 22
(559)
47
(1194)
39-3/8
(1000) 13-7/8 (352) 13 (330) 16-3/4 (425) 43
(1092)
18-1/4
(464)
20 12 x 9 24
(610)
48
(1219)
45-1/8
(1146) 13 (330) 14-1/8 (359) 17-3/4 (451) 44 (1118)
20-3/4
(527)
30 12 x 12 28
(711)
48
(1219)
54-3/16
(1376) 16-1/4 (413) 14-1/8 (359) 16 (406) 44 (1118)
29
(737)
40 15 x 12 28
(711)
62
(1575)
57-5/8
(1464) 16-3/4 (425) 16-3/8 (416) 22-3/4 (578) 58
(1473)
29
(737)

9
Step 4 — Prepare Unit
Be sure that unit power requirements match available power
source. Refer to unit nameplate and wiring diagram. Check all
tags on unit to determine if any shipping screws are to be re-
moved. Remove screws as directed. Install the mixing box if the
unit is ordered with one. Follow the mixing box installation in-
structions found on Step 9 page 16.
Step 5 — Position Unit
1. The horizontal blower coil units have 5/8 in. (15.88 mm)
knockouts in each corner of the top and bottom panels for
1/2 in. (12.70 mm) all thread (not supplied with unit) to
pass through (see Fig. 9 and 10). Be sure to support the
unit from underneath until mounting is complete.
2. Install vibration isolators (recommended for all sizes).
Field-supplied and field-installed accessories must be
independently supported or suspended. It is recommended
that a trapeze suspension be used on 42BHE size 30 and
40 units.
3. To ensure proper drainage and operation, be sure unit is
level. DO NOT mount the unit on a slope. The pitch of a
suspended unit can change after coil is filled; recheck
after filling. Drain pan has built-in slope to ensure proper
drainage.
4. Sufficient clearance must be maintained for service and
maintenance. Ensure that there is a minimum clearance of
24 in. (609.60 mm) on access side for motor, pulley and
belt access. Filter shall be removed from side or top of the
filter rack on vertical unit (42BVE) and side or bottom of
the filter rack on horizontal unit (42BHE). If side access to
filter is desired, the minimum clearance required is the
width of the filter rack plus 6 inches (154.40 mm).
5. A minimum of 48 in. (121.92 cm) clearance is required
between factory supplied electric heater and a field sup-
plied combustible component placed downstream of the
unit.
6. Protect unit from damage from jobsite debris. Do not
allow foreign material to fall into drain pan. Prevent dust
and debris from being deposited on motor or fan.
7. Maximum operating altitude for units is 13,400 ft. (4 km).
All units are IPX0 rated.
TOTAL WEIGHT UNIT CORRECTION FACTOR (LB)
See Fig. 11 and 12 for 8-row water-filled coils and double wall
construction (see Table 1). For a different number of rows, total
unit weight can be determined by:
1. Identify the size of unit and number of rows
2. From Fig. 11 or 12, identify the total weight of the unit
3. From Table 1, identify the correction factor and deduct this
factor from the total weight.
See Fig. 11 and 12 for operating weight information. Weight infor-
mation is based on 8-row water-filled coils and double wall cabi-
net construction. For a different coil and cabinet options, use the
weight correction factor table, Table 1.
Fig. 9 — 42BHE Threaded Rod Suspension
5/8” KNOCKOUTS
FOR SUSPENSION
RODS(4 PLACES
TOP AND 4
PLACESBOTTOM
OF UNIT
ISOLATORS- 4
PER UNIT (FACTORY
FURNISHED AND FIELD
INSTALLED)
3/8” THREADED ROD
SUSPENSION
(FIELD
FURNISHED AND
INSTALLED)
WASHER AND DOUBLE
NUT (FIELD
FURNISHED AND
INSTALLED)
TRAPEZE - REQUIRED ON
42BHE UNIT SIZES30 AND 40.
1.5” x 1.5” x 1/4” ANGLE
FIELD-SUPPLIED AND INSTALLED
ALONG BOTH LONG EDGES.

10
Fig. 10 — 42BHE Units Mounting Details - Threaded
Rod Suspension
Fig. 11 — 42BHE Horizontal Unit — Operating/Distributed Weight Calculations
Washer
Double Nuts
Trapeze
Bolt
Table 1 — Total Weight Unit Correction Factor (lb)a
NOTE(S):
a. Unit weights (shown in pounds), ± 10%, are based on the largest water-filled
coil and a 1 HP motor.
OPTIONS 6 8 10 12 16 20 30 40
4-Row Coil -21-21-28-28-39-46-74-98
5-Row Coil -16-16-21-21-29-35-55-74
6-Row Coil -11-11-14-14-20-23-37-49
7-Row Coil -5 -5 -7 -7 -10 -12 -18 -25
Single Wall
Construction -31-31-40-40-47-58-67-82
Corner Weights — Horizontal Units (42BHE)a
NOTE(S):
a. Operating weight information is based on 8-row water-filled coils and double wall cabinet construction. For a different coil and cabinet option, use Table 1 Total Weight
Unit Correction Factor.
UNIT
42BHE
NO ELECTRIC HEAT (lb) WITH ELECTRIC HEAT (lb)
A B C D TOTAL A B C D TOTAL
06 58 63 55 59 235 58 66 67 75 266
08 59 64 55 59 237 58 67 67 76 268
10 73 81 65 73 292 72 86 78 91 327
12 74 82 66 74 296 73 86 78 92 329
16 92 99 81 88 360 91 103 94 107 395
20 105 113 89 97 404 105 117 103 115 440
30 135 144 109 117 505 135 148 123 136 542
40 176 183 135 143 637 176 187 150 161 674
AB
DC
LH COIL
A
B
D C
RH COIL

11
Fig. 12 — 42BVE Vertical Unit — Operating/Distributed Weight Calculations
Step 6 — Make Piping Connections
DRAIN
The unit has a double-sloped condensate drain pan to ensure prop-
er drainage. The condensate drain must be at least 3/4 in.
(19.05 mm) copper, galvanized, black iron, or PVC piping. Install
the trapped drain line in accordance with all applicable codes.
Slope drain away from unit to prevent overflowing and insulate
the line to prevent sweating.
Drain piping should be sloped a minimum of 1/8 in. (3.175 mm)
per ft away from the unit. See Table 5 and Fig. 3-8. Condensate
drain must be trapped for proper drainage and odor control. The
differential height of the trap inlet to outlet must be at least 1 in.
wg greater than the total static pressure of the unit. The differential
height of the outlet to the bottom of the trap must not be less than
the total static pressure of the unit.
The 42BVE units should be installed on a pad. The height of the
pad should be adequate to allow for a proper condensate trap. The
condensate trap shown in Fig. 13 is for a unit with a total static
pressure (TSP) of 2-in. wg (0.50 kPa) with a 1-in. wg (0.25 kPa)
safety factor for any change in operating conditions. The A dimen-
sion must equal the system TSP plus 1-in. wg (0.25 kPa). The B
dimension is one half of A, and C is the total of A + B + pipe
diameter.
The unit drain pan is equipped with a secondary connection that
must be piped to an open-site drain. This will prevent overflow
and possible building damage if the primary drain is blocked. The
secondary drain connection can be capped if potential overflow
will not damage the building or unit.
Fig. 13 — Condensate Trap
WATER SUPPLY/RETURN CONNECTIONS
Install piping in accordance with all applicable codes. The sup-
ply and return connections are marked on the coil stub ends with
an “S” on the supply (inlet) and an “R” on the return (outlet).
Blue letters mark chilled water connections, red letters indicate
steam or hot water connections. Install valves in lines in accor-
dance with valve manufacturer’s instructions. Be sure valves are
in proper operating position and are easily accessible for
adjustment. See Fig. 14 and Table 2 for hydronic coil piping con-
nection specifications.
Corner Weights — Vertical Units (42BVE)a
NOTE(S):
a. Operating weight information is based on 8-row water-filled coils and double wall cabinet construction. For a different coil and cabinet option, use Table 1 Total Weight
Unit Correction Factor.
UNIT
42BVE
NO ELECTRIC HEAT (lb) WITH ELECTRIC HEAT (lb)
A B C D TOTAL A B C D TOTAL
06 60 62 59 51 232 66 73 69 55 263
08 61 63 59 51 234 66 74 70 55 265
10 73 79 71 60 283 79 91 82 64 316
12 74 80 72 61 287 80 92 83 65 320
16 86 97 84 70 337 92 110 96 73 371
20 105 123 101 83 412 110 138 114 86 448
30 127 156 123 98 504 132 172 137 110 541
40 152 193 146 115 606 156 211 161 116 644
LH COIL
A
B
D
C
RH COIL
D
C
A
B
CAUTION
Residue and loose particles resulting from manufacturing
and field piping techniques such as joint compounds,
soldering flux, and metal shavings may be present in the
unit and the piping system. Ensure system cleanliness when
connecting to water systems.
42BHE/BVE
UNIT
CASING 3.0"
(7.62 cm)
1.5"
(3.81 cm)
CLEAN-OUT
ALLOW A MINIMUM OF
“C” INCHES FROM BOTTOM
OF UNIT TO FINISHED FLOOR
(42BVE UNIT) OR TO FALSE
CEILING (42BHE UNIT).
C
B
A
NOTE: Dimension C is the total of A + B + the pipe diameter.

12
Fig. 14 — Hydronic Coil Piping Connection Diagram
0
0
2(51)
B
C
6-7/8(175)
8-5/8(219)
E
D
1-5/8(41)
A
2-11/16(68)
G
F
10-3/8(264)
CR - Cold Water Return
HR - Hot Water Return
CS - Cold Water Supply
HS - Hot Water Supply
RH - Right Hand
LH - Left Hand
Horizontal, left hand unit with re-heat coil shown.
Coil Header Connection Size
42BHE/
BVE
DIMENSIONS - INCHES (MILLIMETERS)
8 Row 6 Row 4 Row 2 Row HW 1 Row HW
Nom. Size Actual OD Nom. Size Actual OD Nom. Size Actual OD Nom. Size Actual OD Nom. Size Actual OD
06-12 1
(25.400)
1-1/8
(28.575)
3/4
(19.050)
7/8
(22.225)
3/4
(19.050)
7/8
(22.225)
1/2
(12.700)
5/8
(15.875)
1/2
(12.700)
5/8
(15.875)
16-22 1
(25.400)
1-1/8
(28.575)
1
(25.400)
1-1/8
(28.575)
1
(25.400)
1-1/8
(28.575)
1
(25.400)
1-1/8
(28.575)
1/2
(12.700)
5/8
(15.875)
30-40 1-1/2
(38.100)
1-5/8
(41.275)
1-1/2
(38.100)
1-5/8
(41.275)
1-1/2
(38.100)
1-5/8
(41.275)
1-1/2
(38.100)
1-5/8
(41.275)
1-1/2
(38.100)
1-5/8
(41.275)

13
WATER TREATMENT
Proper water treatment is a specialized industry. Carrier recom-
mends consulting an expert in this field to analyze the water for
compliance with the water quality parameters listed below, and
to specify the appropriate water treatment regimen. The expert
may recommend typical additives such as rust inhibitors, scal-
ing preventative, antimicrobial growth agents, or algae preven-
tatives. Anti-freeze solutions may also be used to lower the
freezing point.
Water coil tubes and headers are constructed of pure copper.
Multiple brass alloys may be present in the valve package, de-
pending on unit configuration. It is the user’s responsibility to
ensure the tube and piping materials furnished are compatible
with the treated water.
Failure to provide proper water quality may affect the fan coil
unit’s warranty. See Table 3 for water quality parameters. NOTE: Maximum water operating temperature 190°F (87°C). Maximum
allowable water pressure selectable in Carrier's Fan Coil Builder.
Table 2 — Hydronic Coil Piping Connections
42BHE/
BVE
COIL ROWS DIMENSIONS - INCHES (MILLIMETERS)
Cool Heat A B C D E F G
06/08
4
— — 6-1/8 (155.575) 12-3/4 (323.850) — — — 5-15/16 (150.813)
1 3-1/2 (88.900) 6-1/8 (155.575) 12-3/4 (323.850) 15-1/2 (393.700) 7
(177.800)
7
(177.800) 5-15/16 (150.813)
2 3-13/16 (96.838) 6-1/8 (155.575) 12-3/4 (323.850) 15-13/16 (401.638) 7-9/16 (192.088) 7-9/16 (192.088) 5-15/16 (150.813)
6
— — 6-1/8 (155.575) 12-3/4 (323.850) — — — 8-1/8 (206.375)
1 3-1/2 (88.900) 6-1/8 (155.575) 12-3/4 (323.850) 15-1/2 (393.700) 9-3/16 (233.363) 9-3/16 (233.363) 8-1/8 (206.375)
2 3-13/16 (96.838) 6-1/8 (155.575) 12-3/4 (323.850) 15-13/16 (401.638) 9-3/4 (247.650) 9-3/4 (247.650) 8-1/8 (206.375)
8 — — 6-1/8 (155.575) 12-3/4 (323.850) — — — 10-1/4 (260.350)
10/12
4
— — 7-3/4 (196.850) 14-3/8 (365.125) — — — 5-15/16 (150.813)
1 5-1/8 (130.175) 7-3/4 (196.850) 14-3/8 (365.125) 17-1/8 (434.975) 7 (177.800) 7 (177.800) 5-15/16 (150.813)
2 5-7/16 (138.113) 7-3/4 (196.850) 14-3/8 (365.125) 17-7/16 (442.913) 7-9/16 (192.088) 7-9/16 (192.088) 5-15/16 (150.813)
6
— — 7-3/4 (196.850) 14-3/8 (365.125) — — — 8-1/8 (206.375)
1 5-1/8 (130.175) 7-3/4 (196.850) 14-3/8 (365.125) 17-1/8 (434.975) 9-3/16 (233.363) 9-3/16 (233.363) 8-1/8 (206.375)
2 5-27/61 (138.243) 7-3/4 (196.850) 14-3/8 (365.125) 17-7/16 (442.913) 9-3/4 (247.650) 9-3/4 (247.650) 8-1/8 (206.375)
8 — — 7-3/4 (196.850) 14-3/8 (365.125) — — — 10-1/4 (260.350)
16
4
— — 7-3/4 (196.850) 15-5/8 (396.875) — — — 5-15/16 (150.813)
1LH 10-5/8 (269.875) 7-3/4 (196.850) 15-5/8 (396.875) 12 (304.800) 9-5/8 (244.475) 7 (177.800) 5-15/16 (150.813)
RH 13-3/8 (339.725) 7-3/4 (196.850) 15-5/8 (396.875) 12 (304.800) 9-5/8 (244.475) 7 (177.800) 5-15/16 (150.813)
2 12 (304.800) 7 (177.800) 16-3/8 (415.925) 13-5/8 (346.075) 10-3/8 (263.525) 7-9/16 (192.088) 5-15/16 (150.813)
6
— — 7-3/4 (196.850) 15-5/8 (396.875) — — — 8-1/8 (206.375)
1LH 10-5/8 (269.875) 7-3/4 (196.850) 15-5/8 (396.875) 12 (304.800) 11-13/16 (300.038) 9-3/16 (233.363) 8-1/8 (206.375)
RH 13-3/8 (339.725) 7-3/4 (196.850) 15-5/8 (396.875) 12 (304.800) 11-13/16 (300.038) 9-3/16 (233.363) 8-1/8 (206.375)
2 12 (304.800) 7 (177.800) 16-3/8 (415.925) 13-5/8 (346.075) 12-1/2 (317.500) 9-3/4 (247.650) 8-1/8 (206.375)
8 — — 9-1/2 (241.300) 15-5/8 (396.875) — — — 10-1/4 (260.350)
20
4
— — 7-13/16 (198.438) 18-3/16 (461.963) — — — 5-15/16 (198.438)
1LH 11-15/16 (303.213) 7-13/16 (198.438) 18-3/16 (461.963) 13-5/16 (338.138) 9-5/8 (244.475) 7 (177.800) 5-15/16 (198.438)
RH 14-11/16 (373.063) 7-13/16 (198.438) 18-3/16 (461.963) 13-5/16 (338.138) 9-5/8 (244.475) 7 (177.800) 5-15/16 (198.438)
2 11-9/16 (293.688) 7-7/8 (200.025) 18-3/16 (461.963) 15-13/16 (401.638) 9-1/16 (230.188) 7 (177.800) 5 (127.000)
6
— — 7-13/16 (198.438) 18-3/16 (461.963) — — — 8-1/8 (206.735)
1LH 11-15/16 (303.213) 7-13/16 (198.438) 18-3/16 (461.963) 13-5/16 (338.138) 11-13/16 (300.038) 9-3/16 (233.363) 8-1/8 (206.735)
RH 14-11/16 (373.063) 7-13/16 (198.438) 18-3/16 (461.963) 13-5/16 (338.138) 11-13/16 (300.038) 9-3/16 (233.363) 8-1/8 (206.735)
2 11-9/16 (293.688) 7-7/8 (200.025) 18-3/16 (461.963) 15-13/16 (401.638) 11-1/4 (285.750) 9-3/16 (233.363) 7-1/8 (180.975)
8 — — 7-13/16 (198.438) 18-3/16 (461.963) — — — 10-1/4 (260.350)
30/34
4
— — 5-15/16 (150.813) 26-5/16 (668.338) — — — 5-15/16 (150.813)
1 7-1/16 (179.388) 5-15/16 (150.813) 26-5/16 (668.338) 25-13/16 (655.638) 9 (228.600) 7 (177.800) 4-7/8 (123.825)
2 10-5/16 261.938) 5-15/16 (150.813) 26-5/16 (668.338) 23-13/16 (604.838) 9-1/8 (231.775) 7 (177.800) 4-7/8 (123.825)
6
— — 5-15/16 (150.813) 26-5/16 (668.338) — — — 8-1/8 (206.375)
1 7-1/16 (179.388) 5-15/16 (150.813) 26-5/16 (668.338) 25-13/16 (655.638) 11-1/8 (282.575) 9-1/8 (231.775) 7-1/16 (179.388)
2 10-5/16 (261.938) 5-15/16 (150.813) 26-5/16 (668.338) 23-13/16 (604.838) 11-5/16 (287.338) 9-1/8 (231.775) 7-1/16 (179.388)
8 — — 5-15/16 (150.813) 26-5/16 (668.338) — — — 10-1/4 (260.350)
Table 3 — Water Quality Parameters
WATER CONTAINING REQUIRED CONCENTRATION
Sulphate Less than 200 ppm
pH 7.0 – 8.5
Chlorides Less than 200 ppm
Nitrate Less than 100 ppm
Iron Less than 4.5 mg/l
Ammonia Less than 2.0 mg/l
Manganese Less than 0.1 mg/l
Dissolved Solids Less than 1000 mg/l
CaCO3 Hardness 300 - 500 ppm
CaCO3 Alkalinity 300 - 500 ppm
Particulate Quantity Less than 10 ppm
Particulate Size 800 micron max

14
HYDROSTATIC TEST
When all joints are completed, perform hydrostatic test for leaks.
Hydronic systems should be tested with water (some components
are not designed to hold gas). If gas testing is necessary, pressure
must NOT exceed 80 psig. All chilled water piping and valves not
located over drain pans or drip lips must be insulated to prevent
damage from sweating. Vent all coils during final preparations.
(See Step 10, section 6 on page 18.)
Check interior unit piping for signs of leakage from shipping dam-
age or mishandling. If leaks are found, notify your local Carrier
representative before initiating any repairs.
INSULATION
Following the hydrostatic test, insulate all piping to unit to prevent
sweating.
MAXIMUM EXTERNAL STATIC PRESSURES
See Table 4 for maximum external static pressure information
when units are running at minimum airflow.
Table 5 — Unit Physical Data
LEGEND
WARNING
Never pressurize unit beyond the specified test pressure.
Always pressure test with an inert gas or fluid (nitrogen or
clear water) to avoid possible unit damage or personal injury in
the event of a leak during testing.
CAUTION
All water coils must be protected from freezing after initial
filling with water. Even if system is drained, unit coils may
still hold enough water to cause damage when exposed to
temperatures below freezing.
Table 4 — Maximum External Static Pressures at
Minimum Airflow
42BHE/BVE MINIMUM CFM MAXIMUM ESP
(in. wg)
06 300 0.17
08 400 1.35
10 700 1.75
12 900 0.87
16 1000 1.73
20 1800 1.19
30 2200 1.36
40 3200 1.73
UNIT SIZE 42BHE, BVE 06 08 10 12 16 20 30 40
NOMINAL CFM 600 800 1000 1200 1600 2000 3000 4000
FILTERS (2-in. [50.8 mm] pleated)
Qty 11 1 1 2 2 2 2
Number...Size in. (mm) 16-1/2 x 24
(419 x 610)
16-1/2 x 24
(419 x 610)
18-1/4 x 33
(464 x 838)
18-1/4 x 33
(464 x 838)
18-1/4 x 21-1/2
(464 x 546)
20-1/2 x 22
(521 x 559)
29 x 22 (737
x 559)
29 x 29 (737
x 737)
Face Area (sq ft) 2.8 (0.26) 2.8 (0.26) 4.2 (0.39) 4.2 (0.39) 5.5 (0.51) 6.3 (0.59) 8.9 (0.83) 11.7 (1.09)
HYDRONIC COILS
Size in. (mm) 15 x 20
(381 x 508)
15 x 20
(381 x 508)
15 x 29
(381 x 736)
15 x 29
(381 x 736)
15 x 39
(381 x 991)
18 x 40
(457 x 1016)
27 x 40
(686 x 1016)
27 x 54
(686 x 1372)
Face Area sq ft (sq m) 2.1 (0.195) 2.1 (0.195) 3.0 (0.279) 3.0 (0.279) 4.1 (0.381) 4.9 (0.455) 7.7 (0.715) 10.3 (0.957)
Fins per inch 10 10 10 10 10 10 10 10
Coil Water Volume approx. gal. 
per row of coil (liters)
0.240
(0.908)
0.240
(0.908)
0.324
(1.226)
0.324
(1.226
0.420
(1.590)
0.492
(1.862)
0.768
(2.907)
1.020
(3.861)
FANS
Qty...Size (in.) 1...9 x 4
(229 x 109)
1...9 x 6
(229 x 152)
1...10 x 4
(254 x 102)
1...10 x 7
(254 x 178)
1...11 x 10
(279 x 254)
1...12 x 9
(305 x 229)
1...12 x 12
(305 x 305)
1...15 x 12
(381 x 305)
DX COIL CONN. LIQUID LINE (in.) 1/4 nominal, 0.375 OD 1/2 nominal, 0.625 OD
DX COIL CONN. SUCTION LINE 3/4 in. (19.05 mm) nominal, 0.875 OD 1 nominal, 1.125 OD 1-1/2 nominal,
1.625 OD
DX— Direct Expansion

15
Step 7 — Make Electrical Connections
Refer to the unit rating plate for supply voltage, motor and heater
amperage, and required circuit ampacities. (See Tables 6-8.) The
unit wiring diagram shows all factory and field wiring. Most of the
unit motors are dual-voltage that are factory-wired for a specified
voltage. The motors should be checked to ensure that they are
wired for the correct voltage and rotation.
Units equipped with factory-installed motor controls and discon-
nect will comply with NEC requirements for disconnect, motor
controller and motor overload protection. Separate disconnect and
motor starter are not required to comply with NEC requirements.
All field wiring should be done in accordance with all applicable
local and national codes. Any factory wiring modifications with-
out factory authorization will void all factory warranties and nulli-
fy any agency listings.
The manufacturer assumes no responsibility for any damage and/
or injuries resulting from improperly installed or wired
components.
Install fan switches, thermostats and other accessories in accor-
dance with accessory manufacturer’s instructions and applicable
wiring diagram.
Table 6 — 42BHE, BVE Electric Heater Availability
LEGEND
NOTES:
1. Stages available:
a. Single phase: 1 to 12 kW, 1 stage only
3 to 12 kW, 1 stage or 2 stage
b. Three phase: 1 to 39.9 kW, 1 stage only
4 to 39.9 kW, 1 or 2 stage
12 to 39.9 kW, 1, 2 or 3 stage
2. Electric Heating Capacities (Btuh) = Heater kW x 3413
3. Electric Heater Amperage for Single-phase Power = (Heater kW x
1000)/Applied Voltage 
Electric Heater Amp. for 3-phase Power = (Heater kW x 1000)/
(Applied Voltage x 1.73).
Table 7 — 42BHE, BVE Electric Heater Data
Table 8 — Motor Performance Data (Full Load Amps)
NOTES:
1. Motor full load amps refer to National Electric Code (NEC) amps;
actual motor nameplate amps may vary.
2. NEC data extrapolated for 277-v.
3. Motors are open drip proof, ball bearing, single speed, 1750 rpm
rated at continuous duty, 104°F ambient with reversible rotation.
4. 5HP motors available only on size 40 units.
SERVICE SWITCHES:
The service switch is an On/Off switch on incoming power supply
to unit. Proper amperage load must be determined before switch
can be selected. The range of the fused or non-fused service
switch is 0 to 40 amps.
MCA (minimum circuit amps) = 1.25 x sum of all loads.
MFS (maximum fuse size = MCA rounded up to next avail-
able fuse size.
kW 42BHE UNIT SIZE
06 08 10 12 16 20 30 40
1.0 ··——————
1.5 ····————
2.0 ····————
2.5 ·····———
3.0 ·····———
3.5 ······——
4.0 ······——
4.5 ······——
5.0 ······——
6.0 ········
7.0 —·······
8.0 —·······
9.9 —— ······
12.0 ——— ·····
14.0 ———— ····
15.0 ———— ····
16.0 ———— ····
18.0 ————— ···
19.9 ————— ···
25.0 —————— ··
30.0 —————— ··
35.0 ——————— ·
39.9 ——————— ·
·— Standard Offering
— — Not Offered
kW
FULL LOAD AMPS
Single-Phase Three-Phase
115-v 208-v 240-v 277-v 208-v 240-v 480-v
1.0 8.3 4.8 4.2 3.6 2.8 2.4 1.2
1.5 12.5 7.2 6.3 5.4 4.2 3.6 1.8
2.0 16.7 9.6 8.3 7.2 5.6 4.8 2.4
2.5 20.8 12.0 10.4 9.0 6.9 6.0 3.0
3.0 25.0 14.4 12.5 10.8 8.3 7.2 3.6
3.5 29.2 16.8 14.6 12.6 9.7 8.4 4.2
4.0 33.3 19.2 16.7 14.4 11.1 9.6 4.8
4.5 37.5 21.6 18.8 16.2 12.5 10.8 5.4
5.0 — 24.0 20.8 18.1 13.9 12.0 6.0
6.0 — 28.8 25.0 21.7 16.7 14.4 7.2
7.0 — 33.7 29.2 25.3 19.4 16.8 8.4
8.0 — 38.5 33.3 28.9 22.2 19.2 9.6
9.9 — — — 35.7 27.5 23.8 11.9
12.0 — — — 43.3 33.3 28.9 14.4
14.0 ————38.933.716.8
15.0 ————41.636.118.0
16.0 —————38.519.2
18.0 ——————21.7
19.9 ——————23.9
25.0 ——————30.1
30.0 ——————36.1
35.0 ——————42.1
39.9 ——————48.0
VOLTAGE
V-Ph-Hz
Nominal HP
1/4 1/3 1/2 3/4 11-1/2 2 3 5
115-1-60 5.2 6.0 8.6 13.3 14.4 — — — —
208-1-60 3.0 3.6 4.8 6.6 7.4 9.4 11.0 — —
230-1-60 2.5 3.0 4.2 5.1 6.0 9.0 10.9 — —
277-1-60 2.1 2.5 3.6 5.1 5.4 8.5 8.0 — —
208-3-60 — — 2.4 3.6 3.8 6.0 6.5 8.2 14.0
230-3-60 — — 2.2 3.0 3.2 4.8 6.2 8.0 13.2
460-3-60 — — 1.1 1.5 1.9 2.8 3.1 4.0 6.6

16
Step 8 — Make Duct Connections
Install all ductwork to and from unit in accordance with all appli-
cable codes. Duct construction must allow unit to operate within
the limits of the unit external static pressure as shown on job sub-
mittals.
Units designed to operate with ductwork may be damaged if oper-
ated without the intended ductwork attached. Units configured to
bring in outside air should have some method of low temperature
protection to prevent coil freeze-up.
Insulate all ductwork as required. Use flexible connections to min-
imize duct-to-duct alignment problems and noise transmission
where specified. Acoustic lining of main supply and return duct
should be considered for noise control. Noise transmission will be
reduced when return grilles are located as far as possible from the
unit.
Install ductwork, accessory grilles, and plenums so that they do
not restrict access to filter.
NOTE: Prevent dirt, dust, and debris from settling in unit.
Step 9 — Install Mixing Box
Mixing boxes are preassembled from the factory. A linkage kit
consisting of 2 crankarms, 2 swivels, and either a 25-in. (635.00
mm) (unit sizes 06-16) or a 34-in. (863.60 mm) (unit sizes 20-40)
length of 5/16-in. (7.94 mm) rod is provided for field installation
of the actuator.
To install the mixing box:
1. Assemble the mixing box base rails using the provided
hardware. The base rails are marked with identifying let-
ters. See Fig. 15.
2. Place unit on the base rails. Install mixing box and attach
to base rails using the no. 8 x 1/2 in. fasteners at the loca-
tions shown in Fig. 16 (42BHE units) or Fig. 17 (42BVE
units). See Fig. 18 and 19 for base rail and mixing box
details.
3. Seal the connection between the mixing box and the return
duct flange.
NOTE: Be careful not to tape or seal the filter access panel.
Fig. 15 — Assemble Base
Fig. 16 — Install Mixing Box - 42BHE Units
SEE DETAIL A
SEE DETAIL B
DETAIL A DETAIL B
MOUNTING
LOCATION
MOUNTING
LOCATION

17
Fig. 17 — Install Mixing Box — 42BVE units
Fig. 18 — Base Rail Details
SEE DETAIL A
SEE DETAIL B
DETAIL A DETAIL B
MOUNTING
LOCATION MOUNTING
LOCATION
1(25)
W
FRONT VIEW
D
3(76)
A
1(25)
SIDE VIEW
HORIZONTAL UNITS – DIMENSIONS - INCHES (MILLIMETERS)
Unit Type
and Size WD A
BHE06 28 (711) 51.6 (1311) 16.1 (409)
BHE08 28 (711) 51.6 (1311) 16.1 (409)
BHE10 37 (940) 55.2 (1402) 18.1 (460)
BHE12 37 (940) 55.2 (1402) 18.1 (460)
BHE16 47 (1194) 55.4 (1407) 18.1 (460)
BHE20 48 (1219) 57.8 (1468) 18.1 (460)
BHE30 48 (1219) 59.8 (1519) 20.1 (511)
BHE40 62 (1575) 63.0 (1600) 20.1 (511)
HORIZONTAL UNITS – DIMENSIONS - INCHES (MILLIMETERS)
Unit Type
and Size WD A
BVE06 28 (711) 35.5 (902) 16.1 (409)
BVE08 28 (711) 35.5 (902) 16.1 (409)
BVE10 37 (940) 39.5 (1003) 18.1 (460)
BVE12 37 (940) 39.5 (1003) 18.1 (460)
BVE16 47 (1194) 39.5 (1003) 18.1 (460)
BVE20 48 (1219) 41.5 (1054) 18.1 (460)
BVE30 48 (1219) 47.5 (1207) 20.1 (511)
BVE40 62 (1575) 47.5 (1207) 20.1 (511)

18
Fig. 19 — Mixing Box Details
Step 10 — Make Final Preparations
1. TURN POWER OFF. (Open unit electrical disconnect.)
2. Clean unit thoroughly. Remove dirt and debris from unit,
especially drain pan, drain line, motor, and fan. Pour water
into drain pan to check that drain operates properly.
3. Rotate fan wheel by hand to be sure wheel is free and does
not rub housing. The 42BHE, BVE belt drives are factory-
set at the speed required for the design specifications spec-
ified when ordered. These drives may be adjusted to
achieve different speed by qualified personnel during air
system balancing. Refer to the Start-Up section on page 19
before energizing the unit. Check fan belt tension as
described in the Service section which follows.
4. Check that a clean air filter of proper type and size is
installed in unit filter rack after commissioning. See
Table 5 and Clean or Replace Air Filters section on
page 20. Do NOT operate unit without filter.
5. Turn on water supply. Open all valves. Check for leaks.
Recheck pitch of suspended unit.
6. Vent all air from unit coil and related piping. If air vent is
manual, release air by turning air-vent screw 1-1/2 turns
counterclockwise with screwdriver. When a steady stream
of water begins to escape, close valve. If vent is automatic,
trapped air will be released automatically. Vent releases air
3(76)
A
C
2.4(61)
4(102)
H
2.4(61)
3(76)
1(25)
2(51)
2(51)
WB
TOP VIEWS
BTM/REAR INLET - 42BHE
BTM/FRONT INLET FOR - 42BVE
TOP/REAR INLET - 42BHE
TOP/FRONT INLET FOR - 42BVE
W
4(102)
2.4(61)
C
1(25)
H
A
A
B
A
2.4(61)
DIMENSIONS - INCHES (MILLIMETERS)
42BHE,BVE H W A B C
06 18.5 (470) 28 (711) 6 (152) 24 (610) 11 (279)
08 18.5 (470) 28 (711) 6 (152) 24 (610) 11 (279)
10 20.25 (514) 37 (940) 8 (203) 33 (838) 13 (330)
12 20.25 (514) 37 (940) 8 (203) 33 (838) 13 (330)
16 20.25 (514) 47 (1194) 8 (203) 43 (1092) 13 (330)
20 22.75 (578) 48 (1219) 8 (203) 44 (1118) 13 (330)
30 31.0 (787) 48 (1219) 10 (254) 44 (1118) 15 (381)
40 31.0 (787) 62 (1575) 10 (254) 58 (1473) 15 (381)

19
slowly, usually dripping water into the drain pan in the
process.
7. TURN POWER ON. (Close unit electrical disconnect.)
NOTE: Be sure power is off before making any adjustments inside
unit.
8. Check fan and motor operation. Motor to fan wheel rota-
tion must match airflow direction shown in Fig. 3-8.
Set unit air delivery for required blower rpm per job submit-
tals or product data catalog. Adjust fan motor pulley
(Fig. 20) as follows:
a. Loosen setscrew on movable pulley flange.
b. Screw flange toward fixed flange to increase fan speed
and away from fixed flange to decrease speed.
c. Reset setscrew.
d. Check belt tension. The drive belt should be tensioned to
allow 1/2 to 3/4-in. deflection at the midpoint between
pulleys with moderate pressure.
Fig. 20 — Fan Pulley Adjustments
Inspect the unit for loose wires, correct blower wheel operation,
and loose or missing access panels or doors. Unless otherwise re-
quired for balancing and start-up procedures, units should not be
operated without proper ductwork, supply/return air grilles, and
access panels and/or doors in place.
START-UP
Start-up procedures vary depending upon the time of year (sum-
mer or winter) and building characteristics (new building or old
building, occupied or unoccupied, etc.).
Start-up in the cooling mode requires that proper care be given to
avoid condensation problems. Condensation forms on surfaces
that are colder than the dew point of the surrounding air. If a unit is
started and is fed low-temperature chilled water in a hot, humid
setting, condensation will form on many parts of the unit. In order
to avoid excessive condensation, water of higher temperature
should be used, approximately 65°F to 70°F. Also, the building
should be as completely enclosed as possible and outside-air sup-
ply fans and toilet and kitchen exhaust fans should be off.
As the building temperature drops, the chilled water temperature
can gradually be reduced until it reaches 50°F. At this point, the
outside-air fans can be turned on. When the chilled water tem-
perature is reduced to its design point, the exhaust fans can be
turned on.
Air System Balancing
All ductwork, air grilles, filters, and access doors and panels
must be complete and connected to establish actual system oper-
ating conditions before air system balancing procedures are
started.
NOTE: Units are factory set for system designed operating condi-
tions specified at the time of order entry.
Proper belt drive alignment and tension must be maintained when
adjusting the unit fan drive speed. The drive belt tension should
not exceed 3/16-in. (4.76 mm) deflection midway between the
pulleys under 8 lb of force. New belts tend to stretch during their
initial period of use. After 5 days of operation, check and readjust
belt tension and pulley alignment if necessary. Failure to do so
may result in excessive unit noise and/or premature belt/bearing
failure.
SERVICE
Clean Coils
1. Brush between coil fins with a stiff wire brush. Do not
bend fins. Follow up by cleaning with a vacuum cleaner. If
coil is cleaned with an air hose, take care not to drive dirt
and dust into other components.
2. Install clean air filters.
Check Drain
Check drain pan, drain line and trap at start of each cooling sea-
son. A standard type pipe cleaner for 3/4 in. (19.05 mm) ID pipe
can ensure removal of obstructions so that condensate is carried
away. Check the drain line at filter cleaning time during the cool-
ing season.
Fan and Motor Bearings
Fan shaft bearings are permanently lubricated and sealed, and
need no attention. Check tag on motor for motor bearing lubrica-
tion instructions (if any). Most motors furnished with these units
are permanently lubricated.
CAUTION
The air vent provided on the unit is not intended to replace the
main system vents and may not release air trapped in other
parts of the system. Inspect the entire system for potential air
traps and vent those areas as needed. Some systems may
require repeated venting over a period of time to properly
eliminate air from the system. Failure to do so could result in
equipment damage.
CAUTION
Do not exceed motor nameplate FLA (full load amps).
Operator must confirm motor current draw before putting unit
into service and again after air balancing the system. Failure to
do so could result in equipment damage.
CAUTION
Follow all safety considerations previously outlined. Failure to
do so could result in personal injury or equipment damage.
WARNING
Lock open and tag electrical disconnect before servicing
equipment. Failure to do so could result in personal injury or
death.

20
Align Pulley
Loosen pulley setscrew(s). Align pulleys by using a straight edge
as shown in Fig. 20. Re-tighten setscrew(s).
Adjust Fan Belt Tension
Loosen fan motor base mounting screws. Reposition the motor so
that belt deflection does not exceed 3/16-in. at belt midpoint under
8 lb of force. Re-tighten motor mounting screws and recheck fan
belt tension.
Clean Fan Wheel
Use a stiff brush or vacuum to remove dirt and debris from scroll.
Wipe all fan surfaces with a damp cloth.
Clean or Replace Air Filters
Each unit is equipped with return air filters. At the start of each
cooling season and after each month of operation (more or less de-
pending on operating conditions), replace unit filter.
Unit filters are 1 in. (25.40 mm), 2 in. (50.80 mm) or 4 in.
(101.60 mm) thick. Filters can be easily accessed from the side or
bottom of the filter rack (see Fig. 21).
To remove filters from the side of the filter rack:
1. Remove the side access panel of the filter rack by pulling tab
at the bottom of the panel to free from magnets, and lower it
out of the slot in the top of the filter frame
2. Pull out dirty filters.
3. Replace with new appropriate size filters.
4. To re-install side access panel into filter rack
a. Insert the tab of panel into the slot in filter frame’s top.
b. Rotate panel toward the frame, ensure magnets are
engaged.
To remove filters from the bottom of the filter rack:
1. Open hinged bottom access panel - pull down to disengage
magnets.
2. Pull out dirty filters.
3. Replace with new appropriate size filters.
4. Secure bottom access panels, make sure magnets are re-
engaged.
Units are designed to accept various filter sizes depending on job
requirements. Each filter frame is equipped with Filter Support
Angle Brackets and 1 in. (25.40 mm) or 2 in. (50.80 mm) filter
slots on all four sides of filter frame. The Filter Support Angle
Brackets are designed to provide guidance and support to the new
filter as it is being inserted.
In order to accommodate 1 in. (25.40 mm) and 2 in. (50.80 mm)
filters, the bracket should be inserted into corresponding slots on
all sides of the filter frame (See Fig. 21) and secured with screws.
When 4 in. filter is installed, the brackets should be stored for fu-
ture use with different filter thickness, or discarded if 4 in. filter
will be always used.
Recommended Maintenance
Quarterly
• Lubricate motor and blower bearings (if applicable)
• Check and adjust belt tension
• Change air filter
Annually (in addition to quarterly maintenance)
• Inspect all wiring connections and tighten if necessary
• Check and tighten set screws on pulleys
• Clean coil and drain pan
• Clean blower wheel as needed
Fig. 21 — Horizontal Unit Filter Rack
TROUBLESHOOTING
Excessive Condensation on Fan Coil Unit Parts
Excessive condensation can be caused by running chilled water
through a fan coil unit with its fan off. If fan cycling control is
used, a water-flow control valve should be installed to shut off the
water when the fan stops.
The following two practices will also help avoid condensation
problems:
1. Continuous fan operation with motorized chilled water
valve controlled by thermostat.
2. Continuous fan operation with thermostat control to
switch fan from high to low speed (instead of switching it
off).
Motor Overload
The following are causes and remedies for motor trip-out on over-
load:
Cause:
Fan delivers too much air because external static pressure is
lower than the design pressure.
Remedy:
Reduce fan speed by adjusting motor pulley or changing
fan shaft pulley to larger diameter.
Cause:
Air temperature across fan motor is too high (heating
mode).
Remedy:
Check ambient temperature on motor’s nameplate. Com-
pare to actual air temperature at the motor or at the fan dis-
charge. If motor’s nameplate lists and ambient temperature
of 104°F and the actual air temperature is higher, either low-
er the air temperature or obtain a special motor rated for
high ambient temperatures.
1” Filter
2” Filter
4” Filter
Magnet
See Detail X
Detail X