Carrier 40MKCB**C/124ANS, Installation Instructions Manual, Page: 8 / 24

8
Condensate Drain Pipe Sizes
Refer to table 11 for the required sizes.
Table 11 – Drain Pipe Sizes
Indoor Unit Size
BTU/Hr
Outside Diameter
in (mm)
18K 1 (25.4)
24K – 34K 1 (25.4)
Refrigerant Charge
The outdoor units can be matched with multiple indoor units and
thus a different amount of charge might be required when matched
with the 40MKCB**C or 40MKQB**C units. Charge to
Sub--cooling Delta from Rating Plate Value as stated below.
Table 12 – Charge Requirements
System
Type
Nominal
Capacity
kBTU/Hr
Outdoor Unit Indoor Unit
Charge to
Sub--cooling Delta
from Rating Plate
Value
Cooling
Only
018 24AHA418A003 124ANS018000 40MKCB18C----3 12
024 24AHA424A003 124ANS024000 40MKCB34C----3 12
030 24AHA430A003 124ANS030000 40MKCB34C----3 12
034 24AHA436A003/5/6 124ANS036000 40MKCB34C----3 8
Heat
Pump
024 25HHA424A003 224ANS024000 40MKCB34C----3 14
030 25HHA430A003 224ANS030000 40MKCB34C----3 11
034 25HHA436A003/5/6 224ANS036000 40MKCB34C----3 14
NOTE
: :
The above additional charge is required amount for
line lengths up to 25 ft (7.6 m). For line lengths exceeding 25 ft
(7.6 m), additional charge will be required. Refer to the
Residential Long Line Guide .
Metering Device
The 40MKC(Q)*C unit uses a TXV while the outdoor unit uses a
type B accurator. The cooling metering device is installed with the
indoor unit. The heating metering device is installed with the
outdoor unit. One metering device is required for the cooling only
system and two are required for the heat pump systems. Refer to
Table 13 for a breakdown of each unit’s metering devices.
Table 13 – Metering Devices
System Size
kBTU/hr
Cooling Only Heat Pumps
40MKCB**C 40MKQB**C 25HHA4/224ANS
018 TXV - -
024 TXV TXV 0.049"
030 TXV TXV 0.055"
034 TXV TXV 0.063"
Power and Connecting Cables -- Field Supplied
Recommended Connection Method for Power and
Communication Wiring (To minimize communication
wiring interference)
Power Wiring:
The main power is supplied to both the indoor and the outdoor
units. The field supplied connecting cable consists of three (3)
wires. Two wires are high voltage AC power and one is a ground
wire.
Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.
All wires must be sized per NEC or CEC and local codes. Use
Electrical Data table MCA (minimum circuit amps) and MOCP
(maximum over current protection) to correctly size the wires and
the disconnect fuse or breakers respectively.
Per caution note, only copper conductors with a minimum 300 volt
rating and 2/64--inch thick insulation must be used.
Communication Wiring:
A separate shielded copper conductor only with a minimum 300
volt rating and 2/64--inch thick insulation must be used as the
communication wire from the outdoor unit to the indoor unit. To
minimize voltage drop of the communication wire, use the wire
size and maximum lengths shown in table 14.
Table 14 – Maximum Lengths
Wire Size Length ft. (m)
18AWG 50 ft. (15 m)
16AWG 50 ft. (15 m) to 100 ft. (30 m)
EQUIPMENT DAMAGE HAZARD
Failure to follow the following caution may result in
equipment damage or improper operation.
Wires should be sized based on NEC and local codes.
Use copper conductors only with a minimum 300 volt
rating and 2/64 inch thick insulation.
CAUTION
!
User Interface
The indoor unit is supplied with a wireless remote control to
operate the unit (an Owner’s Manual is supplied with the unit). The
following accessories are available.
S
Wall mounted control.
Operating Range
Ensure that the system operates within the application guidelines
shown in the following tables.
Table 15 – Cooling Operating Range
Maximum Minimum
DB °F (°C) WB °F (°C) DB °F (°C) WB °F (°C)
Outdoor
Unit
125 (51.7) - 55 (12.8) -
Indoor Unit 90 (32) - 64 (18) -
Table 16 – Heating Operating Range
Maximum Minimum
DB °F (°C) WB °F (°C) DB °F (°C) WB °F (°C)
Outdoor
Unit
75 (23.9) 67 (19.4) 17 (-8.3) -
Indoor Unit 80(27) 32 (0) -
Accessories
An extensive list of field installed accessories is available for both
indoor and outdoor units. Identify what accessories, if any, are
required for the application at hand and consult the separate
installation instructions for the accessories. Some of the
accessories, especially on the indoor units, can be installed much
easier if planned ahead.