Clearances - - Indoor; Clearances - - Outdoor; System Requirements - Carrier 40MKCB**C/24AHA4 Installation Instructions Manual

CLEARANCES - - INDOOR

CLEARANCES - - OUTDOOR

1. Single Unit Applications: With coil facing wall: Allow 6"
(152.4mm) minimum clearance on coil side and coil end and
20" (504.0 mm) minimum clearance on fan side. Allow 24"
(609.6 mm) minimum clearance on compressor end for
service.
2. With fan facing wall: Allow 8" (203.2 mm) minimum
clearance on fan side and coil end and 20" (504.0 mm)
minimum clearance on coil side. Allow 24" (609.6 mm)
minimum clearance on compressor end for service when units
are stacked or there is less than 40" (1016 mm) of clearance
above the unit. If there is 40" (1016 mm) clearance above unit
and the top panel is accessible for removal allow 8" (203.2
mm) minimum clearance on compressor end for service.
3. Multi- -unit Applications: Allow 24" (609.6 mm) minimum
clearance between fan and coil sides of multiple units. Arrange
units so discharge of one does not enter inlet of another. Allow
24" (609.6 mm) minimum clearance on compressor end when
units are stacked or there is less than 40" (1016 mm) of
clearance above the unit. If there is 40" (1016 mm) clearance
above unit and the top panel is accessible for removal allow 8"
(203.2 mm) minimum clearance on compressor end for
service. When two units are installed end to end with the coil
ends facing each other allow 12" (304.8 mm) minimum
clearance between units.
IMPORTANT: When installing multiple units, ensure the
discharge air from one unit is not drawn into another unit. When
installing single or multiple units in an alcove, roof well, or
partially enclosed area, ensure there is adequate ventilation to
prevent recirculation of discharge air.
Fig. 9 - - 40MKC**B, 40MKQ**B Unit Clearance
7

SYSTEM REQUIREMENTS

Clearances
Allow sufficient space around the indoor and outdoor unit for
proper airflow circulation and servicing. Refer to Fig.9 and the
outdoor unit clearance section for minimum required clearances.
Piping: Piping and insulation is field supplied.
Piping Lengths
The minimum length between the indoor and outdoor units is 10 ft
(3 m). Refer to table 9 for the maximum lengths allowed.
Table 9 – Maximum Refrigerant Line Lengths
Max Line
Unit Size
Length* ft(m
18K-34K 250 (76.2)
Note:For lengths greater than 25 ft (7.6 m), refer to the Residential Long
Line Guide.
Pipe Sizes
In some models, indoor unit and/or outdoor unit pipe sizes may
differ from those in TXV connections. Coupling is required in
those cases. See Table 10 for complete list of tube sizes to identify
coupling needs.
Table 10 – Pipe Sizes
Indoor Unit Tube
Sizes (in)
Indoor Unit Outdoor Unit
Liquid
24AHA418
40MKCB18C- - - - 3
124ANS018
24AHA424
40MKCB34C- - - - 3
124ANS024
24AHA430
40MKCB34C- - - - 3
124ANS030
24AHA436
40MKCB34C- - - - 3 3/8
124ANS036
25HHA424
40MKQB34C- - - - 3
224ANS024
25HHA430
40MKQB34C- - - - 3
224ANS030
25HHA436
40MKQB34C- - - - 3
224ANS036
Note:Both lines need to be insulated using at least 1/2 inch closed foam
insulation.
A150152
Max Elevation Max
(ID over OD) Elevation (OD
ft ( m) over ID) ft (m)
65 (19.8) 200 (61)
TXV Kit Tube Outdoor Unit
Sizes (in) Tube Size (in)
Vapor Liquid Vapor Liquid Vapor
5/8 5/8 5/8
3/4 3/4 3/4
3/4 3/4 3/4
3/4 3/8 3/4 3/8 7/8
3/4 3/4 3/4
3/4 3/4 3/4
3/4 3/4 7/8