Section 4. Outdoor Unit Is Below The Indoor Unit - Daikin RR20AVAK9 Installation & Service Reference

SECTION 4. OUTDOOR UNIT IS BELOW THE INDOOR UNIT

Crankcase Heater (40 watts minimum)
Liquid Line Solenoid at Outdoor
Inverted Refrigerant Trap at Indoor
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 accumula-
tor 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.
Total System Refrigerant Charge
oz.
112
144
176
208
240
288
352
480
Accessory
Hard Start Assist
TXV (Indoor)
(Kit # LSK02*)
Oil Trap at Indoor
L
L = Length of trap must be more than Indoor Unit Height (H)
Figure 4-1. Indoor Unit with Inverted Suction
kg.
lb. Part Number
7 3.2 0151R00004P
9 4.1
11 5.0
13 5.9 0151L00008
15 6.8 0151L00009
18 8.2 0151L00001
22 10.0 0151L00010
30 13.6 0151L00010
Table 4-1. Accumulator Size
Air Conditioner (AC)
Yes
Yes
(See manual for each product)
Yes
Yes
Yes
No
Goodman Accumulator
Preferred
Connection
3/4"
B1226206 3/4"
B1226207 7/8"
7/8"
7/8"
1 1/8"
7/8"
7/8"
31
Heat Pump (HP)
Yes
Yes
(See manual for each product)
Yes
Yes *See Note 5
Yes
No
H
Minimum
Part Number Connection
0151R00004P 3/4"
0151R00004P 3/4"
B1226206 3/4"
B1226206 3/4"
B1226207 7/8"
0151L00008 7/8"
0151L00001 1 1/8"
0151L00010 7/8"