Technical Publication

SECTION 4. OUTDOOR UNIT IS BELOW THE INDOOR UNIT

Acce ssory Air Conditioner (AC) Heat Pump (HP)

Crankcase Heater (40 watts minimum) Yes Yes

Hard Start Assist

Yes

(See manual for each product)

Yes

(See manual for each product)

TXV (Indoor) Yes Yes

Liquid Line Solenoid at Outdoor

(Kit # LSK02*)

Yes Yes *See Note 5

Inverted Refrigerant Trap at Indoor Yes Yes

Oil Trap at Indoor No No

1. The maximum elevation (vertical) difference between the outdoor unit and the indoor unit is 80 feet

(24.4 m).

2. Suction line must be installed in a manner to prevent liquid migration to the outdoor unit from the

indoor unit (see following note 3).

3. An inverted suction line trap must be installed on the suction line just before the inlet to the indoor unit

(see Figure 4-1). The top of the inverted loop must be slightly above the top of the indoor unit coil and

can be created simply by brazing two 90° long radius elbows together if a bending tool is unavailable.

Properly support and secure the inverted loop to the nearest point on the indoor unit or adjacent structure.

4. An accumulator is required to be added (external to the outdoor unit, within 2 linear feet (61 linear

centimeters) of the outdoor unit) for air conditioning installations. See Table 4-1 for accumulator selection.

Adapter fittings at the accumulator connection may be required. Do NOT install an accumulator in the

suction line set in heat pump applications.

5. Liquid Line Solenoid not required if non-bleed TXV is used on the outdoor unit.

L = Length of trap must be more than Indoor Unit Height (H)

Figure 4-1. Indoor Unit with Inverted Suction

oz. lb.

kg.

Part Number Connection Part Number Connection

112 7 3.2 0151R00004P 3/4" 0151R00004P 3/4"

144 9 4.1 B1226206 3/4" 0151R00004P 3/4"

176 11 5.0 B1226207 7/8" B1226206 3/4"

208 13 5.9 0151L00008 7/8" B1226206 3/4"

240 15 6.8 0151L00009 7/8" B1226207 7/8"

288 18 8.2 0151L00001 1 1/8" 0151L00008 7/8"

352 22 10.0 0151L00010 7/8" 0151L00001 1 1/8"

480 30 13.6 0151L00010 7/8" 0151L00010 7/8"

Goodman Accumulator

Preferred Minimum

Total System Refrigerant Charge

Table 4-1. Accumulator Size