Spec Sheet

31-5000409 Rev. 0 13
ENGLISH
SYSTEM
Part 3: Installation Requirements
3.1 Lineset
A. The connecting refrigerant lines between the indoor and outdoor units are to be supplied by the installer.
B. The tubing must be annealed ACR-type copper, meeting ASTM B280 standards.
C. The connecting tubing between the outdoor and indoor units shall be continuous in all possible situations.
D. The tubing ends must be reamed inside and out, and must be flared using a 45° flaring tool approved for
R-410A.
E. Connections to the indoor and outdoor units shall be made with flare nuts that are supplied with the individual
units.
F. The flare nuts must be attached to indoor and outdoor units using a torque wrench and
back -up wrench.
Pipe Size Torque A (inch) Flare Shape
1/4 12 lb/ft 16.3 Nm 0.327-0.343
A
3/8 27 lb/ft 36.6 Nm 0.472-0.488
1/2 40 lb/ft 54.2 Nm 0.488-0.654
5/8 50 lb/ft 67.8 Nm 0.732-0.748
3/4 80 lb/ft 108.5 Nm 0.902-0.917
G. Each tube must be insulated with a minimum of 1/2 inch (12.7mm) closed-foam insulation that is UV resistant
and meets ASTM Standard E84 25/50 flame spread/smoke development.
H. The lineset between the indoor and outdoor must not exceed the listed maximum length and maximum height
difference. See chart below.
Outdoor
Models
Minimum
Branch Length
Maximum
Branch Length
Maximum Total
Length
Maximum Height
Difference
Maximum Height
Difference
2U18MS2VHB 6ft (1.8m) 65ft (20m) 100ft (30m) 50ft (15m) 50 ft (15.25)
3U24MS2VHB 6ft (1.8m) 82ft (25m) 200ft (60m) 50ft (15m) 50 ft (15.25)
4U36MS2VHB 6ft (1.8m) 82ft (25m) 230ft (70m) 50ft (15m) 50 ft (15.25)
Part 4: Electrical Requirements
4.1 Electrical Supply
A. The operating electrical requirements shall be 208/230 volts AC, single-phase, 60 hertz. Voltage supplied to
the outdoor unit must be between 187-253 volts.
B. Power supply must be installed in accordance to NEC standards.
4.2 Connecting Wire to Indoor
A. Connecting cable between the indoor unit(s) must be made with 4 conductor - 14 AWG stranded copper wire.
B. Connecting wire must be continuous (without break) unless local code requires power disconnect next to
indoor unit. See indoor electrical section 3.1 for the specification.