37MGHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
PRIOR TO INSTALLATION
Before installing the indoor unit, ensure compatibility with the outdoor
unit using the Product Data as a reference. It is also necessary to confirm
the proper application of the equipment and to perform a heat load calcu-
lation for proper sizing.
Table 3 — Releasable Charge Calculation
Table 4 — Pipe Specification
NOTE:
- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making a
downward arc in the connection pipe before it enters the wall to the indoor unit. This ensures that rain drips from the connection pipe
before it enters the wall.
- Piping and the interconnecting wiring are field supplied.
RELEASABLE CHARGE
OF INDOOR UNITS
BASIC RELEASABLE
CHARGE, OZ (G)
EXTRA RELEASABLE CHARGE TOTAL RELEASABLE CHARGE
Based on Table 2, add releas-
able charges of all connected
indoor units.
7.2 (204)
• 0 oz when connection pipe length for
each indoor unit is within 25 ft (7.6 m).
• 0.7 oz (20 g) per foot (meter) exceeding
25 ft (7.6 m) for each 6/9/12/18k unit.
• 1.8 oz (50 g) per foot (meter) exceeding
25 ft (7.6 m) for each 24/36k unit.
Add releasable charge of indoor units, basic
releasable charge, and any extra releasable charge
to get total releasable charge.
OUTDOOR MODEL 37MGHAQ18CA3 37MGHAQ24DA3 37MGHAQ30EA3 37MGHAQ36EA3 37MGHAQ48FA3 37MGHAQ55FA3
Power
supply
V;Ph;
Hz
208/230V;1Ph;60HZ
Piping and Refrigerant
Information
Refrigerant Type Type R454B
Charge Amount lb. (kg) 4.89 (2.22) 7.54 (3.42) 8.38 (3.8) 8.38 (3.8) 9.48 (4.3) 9.48 (4.3)
Liquid Pipe
(size - connection type)
In (mm) 3 x 1/4in (3 x 6.35mm) 4 x 1/4in (4 x 6.35mm) 5 x 1/4in (5 x 6.35mm) 6 x 1/4in (6 x 6.35mm)
Suction Pipe
(size - connection type)
In (mm) 3 x 3/8in (3 x 9.52mm)
3 x 3/8in + 1 x 1/2in
(3 x 9.52mm + 1 x
12.7mm)
3 x 3/8in + 2 x 1/2in
(3 x 9.52mm + 2 x 12.7mm)
4 x 3/8in + 2 x 1/2in
(4 x 9.52mm + 2 x 12.7mm)
Number of IDU ft. (m) 3 4 5 5 6 6
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