Whirlpool W2GH3, Installation Instructions Manual

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5
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Adjustment of the refrigerant charge will be necessary based
on the system combination and line length. To adjust the
refrigerant size for increased line lengths and the following
amount of refrigerant.
For line set lengths greater than 15 ft:
1. Add refrigerant by weighing in 0.60 oz per ft of
³⁄₈
" O.D.
liquid line.
2. Add refrigerant by weighing in 1.2 oz per ft of
¹⁄₂
" O.D.
liquid line.
■
If necessary, adjust the refrigerant charge for compatibility
with the evaporator coil.
■
In heat pump systems, horizontal suction lines should be
slightly sloped toward the heat pump. Piping must avoid dips
or low spots which can collect oil.
Suction Line Sizes
Installations exceeding 100 ft are not recommended.
Liquid Line Sizes
Installations exceeding 100 ft are not recommended.
Make Electrical Connections
IMPORTANT:
■
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer to the
rating plate for the maximum over-current protection,
minimum circuit ampacity, and operating voltage. See wiring
diagrams later in this section.
■
Install an adequately sized branch circuit disconnect, per the
NEC, within sight of and readily accessible from heat pump.
■
The cable or conduit and fittings connected from the
disconnect to the heat pump shall be rated for outdoor use.
BTU/HR Line Set Size (in. OD)
18,000
³⁄₄ ³⁄₄ ³⁄₄
24,000
³⁄₄ ³⁄₄ ³⁄₄
30,000
³⁄₄ ³⁄₄ ³⁄₄
36,000
⁷⁄₈ ⁷⁄₈ ⁷⁄₈
42,000
⁷⁄₈ ⁷⁄₈ ⁷⁄₈
48,000
⁷⁄₈ ⁷⁄₈ ⁷⁄₈
60,000 1
¹⁄₈
1
¹⁄₈
1
¹⁄₈
Line Set Length Less than
25 ft 25 ft Over 25 ft
and up to
50 ft
BTU/HR Line Set Size (in. OD)
18,000
³⁄₈ ³⁄₈ ³⁄₈
24,000
³⁄₈ ³⁄₈ ³⁄₈
30,000
³⁄₈ ³⁄₈ ³⁄₈
36,000
³⁄₈ ³⁄₈ ³⁄₈
42,000
³⁄₈ ³⁄₈ ³⁄₈
48,000
³⁄₈ ³⁄₈ ³⁄₈
60,000
³⁄₈ ³⁄₈ ³⁄₈
Line Set Length Less than
25 ft 25 ft Over 25 ft
and up to
50 ft
WARNING
Rating Plate Ampacity
Less than 15
16 - 20
21 - 30
AWG
14
12
10
8
31 - 50
Electrical Shock Hazard
Electrically ground condensing unit or heat pump.
Connect ground wire to ground lug.
Use copper wire for supply connection.
Correct wire gauge is shown in the chart below.
Failure to follow these instructions can result in
death or electrical shock.