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5
Refrigerant Charge
The 38HDF and 38QRF units can be matched with multiple
outdoor units and thus additional charge might be required when
matched with the 40QNC or 40QNQ units.
Table 6 – Additional Charge
Additional Charge lb (kg)
Unit Size 38HDF 38QRF
018 1.2 (0.55) 0.8 (0.36)
024 1.0 (0.45) 0.5 (0.23)
030 2.4 (1.1) 0
036 0 0
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 Duct Free Splits Long 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
System Type Size
Cooling
Accurator
Heating
Accurator
Cooling Only
018 49 ---
024 55 ---
030 63 ---
036 70 ---
Heat Pumps
018 49 45
024 55 49
030 63 53
036 70 63
Power and Connecting Cables -- Field Supplied
Power:
S The indoor and outdoor units require a dedicated power supply.
S Consult local building codes, NEC (National Electric Code) or
CEC (Canadian Electric Code) for any special requirements.
S 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 / QRF Electrical Requirements
Unit
Size
Voltage
38HDF 38QRF
Min Ckt Amps/
Fuse HACR Bkr
Amps
Min Ckt Amps/
Fuse HACR Bkr
Amps
018 208/ 230---1---60 12.1/20 12.1/20
024 208/ 230---1---60 16.8/25 16.8/25
030 208/ 230---1---60 18.4/30 18.4/30
036 208/ 230---1---60 23.8/40 23.8/40
036 208/ 230---3---60 18.0/30 18.0/30
036 460 --- 3 --- 60 8.3/15 8.3/15
Table 9 – 40QNC / QNQ Electrical Requirements
Unit
Size
Voltage
40QNC 40QNQ
Min Ckt Amps/
Fuse HACR Bkr
Amps
Min Ckt Amps/
Fuse HACR Bkr
Amps
018 208/ 230---1---60 0.48/15 0.48/15
024 208/ 230---1---60 0.48/15 0.48/15
030 208/ 230---1---60 0.48/15 0.48/15
036 208/ 230---1---60 0.55/15 0.55/15
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
The indoor unit is supplied with a wireless remote control. The
following accessories are also available
S Wall mounted control. Up to 6 units can be daisy chained and
controlled by one wired control.
S Zone manager capable of controlling up to 32 units divided up
to 8 different zones.
Operating Range
Ensure that the system operates within the application guidelines
shown in Table 10.
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.