Refriuerant Charge
The 38HDF and 38QRF units can be matched with multiple
outdoor units and thus additional charge might be required when
matched with the 40KMC or 40KMQ units,
Table 6 - Additional Charge
Additional Charge Ib (kg)
Unit Size 38HDF 38QRF
018 0 0
024 1.2 (0.55) 0
030 3.0 (1.40) 1.8 (0.82)
036 0.8 (0.36) 0
Note:The above additional charge is required amount for line lengths up to
25 ft (7.6m), For line lengths exceeding 25ft (7.6 m), additional charge will
be required. Referto the Duct Free SpfitsLong Line Guide.
Metering Device
The metering device(s) for these systems is a type B Accurator
installed with the outdoor unit. One Accurator is required for the
cooling only system and two are required for the heat pump
systems. The Accurators are supplied with the outdoor unit.
However, since the same outdoor unit can be matched with
multiple indoor units, the correct Accurator must be selected. Refer
to Table 7 for the correct Accurator size.
Table 7 - Accurator Sizes
Cooling
System Type Size Accurator
018 49
024 57
Cooling Only 030 61
036 74
018 51
024 55
Heat Pumps 030 63
036 70
Heating
Accurator
46
53
55
63
Power and Connecting Cables - Field Supplied
Power:
• The indoor and outdoor units require a dedicated power supply.
• Consult local building codes, NEC (National Electric Code) or
CEC (Canadian Electric Code) for any special requirements.
• Use Table 8 for the electrical requirements for the outdoor units
and Table 9 for the indoor units to correctly size the cables and
disconnect switches.
Table 8 - 38HDF
Unit
Size Voltage
018 208/230-1-60
024 208/230-1-60
030 208/230-1-60
035/36 208/230-1-60
035/36 208/230-3-60
035/36 460-3-60
QRF Electrical Requirements
38HDF
Min Ckt Amps/
Fuse HACR Bkr
Amps
12.1/20
16.8/25
18.4/30
23.8/40
18.0/30
8.3/15
38QRF
Min Ckt Amps/
Fuse HACR Bkr
Amps
12.1/20
16.8/25
18.4/30
23.3/35
14.5/20
8.7/15
Table 9 - 40KMC / KMQ Electrical Requirements
40KMC 40KMQ
Unit Voltage Min Ckt Amps/ Min Ckt Amps/
Size Fuse HACR Bkr Fuse HACR Bkr
Amps Amps
018 208/230-1-60 0.8/15 16.3/20
024 208/230-1-60 0.7/15 16.3/20
030 208/230-1-60 1.3/15 16.9/20
036 208/230-1-60 1.3/15 16.9/20
Control Wiring
Thermostat wires should be used for control wiring between the
indoor and outdoor units. A two conductor cable is required for
the cooling only units and a seven conductor cable is required on
heat pumps. 18 AWG is recommended for any length up to 50 ft
(15.2 m). 16 AWG is recommended for lengths between 50 and
200 ft (15.2 and 61.0 m).
User Interface
For 38HDF and 38QRF units matched with 40KMC and 40KMQ
units, the following accessories are available
• Wall mounted control. Up to 6 units can be daisy chained and
controlled by one wired control.
• Zone manager c@able of controlling up to 32 units divided up
to 8 different zones.
• Wireless remote control.
NOTE: Units are factory ready for wall mounted wired
controls. See User Interface Installation section in this
document.
Operating Range
Ensure that the system operates within the @plication guidelines
shown in the following tables,
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 (32.2) 74 (23.3) 62 (17.0) 56 (13)
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 81 (27.2) -- 62 (17.0) --
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.
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