16
E
6. Cooling pipe and drain pipe
Notes:
•
Cooling pipes are available as an option. Read the manual before
beginning their installation.
•
Place insulation materials over cooling pipes and drain pipes to
prevent condensation.
•
If commercially available copper pipes are used, wrap liquid and
gas pipes with commercially available insulation materials (heat-
resistant to 100
°
C or more, thickness of 12 mm or more).
•
The indoor parts of the drain pipe should be wrapped with
polyethylene foam insulation materials (specific gravity of 0.03,
thickness of 9 mm or more).
6.1. Refrigerant and drainage pipe sizes
Refrigerant and Drainage Piping Sizes
Item
Model
PLH-2, 2.5
Liquid
ODø9.52 (3/8")
Gas
ODø15.88 (5/8")
Drainage piping
PVC pipe: VP-25 [ODø32 (1 1/4")]
Ordering numbers for separately sold refrigerant pipes
PLH-2, 2.5
5 m
PAC-05FFS-E
7 m
PAC-07FFS-E
10 m
PAC-10FFS-E
15 m
PAC-15FFS-E
6.2. Charging refrigerant
1
Refrigerant amount
This product needs no additional charging of refrigerant for a pipe length
of 30 m or less. If the pipe length is longer than 30 m, add refrigerant
according to the table shown below.
•
To add refrigerant, use the check valve connected to the low pressure
pipe inside the outdoor unit.
Models
Allowable pipe
Amount of additional refrigerant (kg)
length (m)
31 – 40 m
41 – 50 m
PLH-2
40
0.2
—
PLH-2.5
40
0.2
0.5
2
Air purge
Never air purge the refrigerant piping by releasing the refrigerant (gas)
contained in the outdoor unit. Always use a vacuum pump.
Warning:
Never use substances other than the specified refrigerant (R-22).
6.3. Refrigerant and Drainage Piping Lo-
cations
A
Drain pipe (Connect to VP-25)
B
Ceiling panel
C
Grille
D
Refrigerant pipe (liquid)
E
Refrigerant pipe (gas)
F
Drain plug
G
Water supply inlet (Drain lift-up mechanism)
H
Main unit
I
Viewed from unit ceiling
•
When the optional multi-functional casement is installed, add 135 mm
to all dimensions marked with
∗
.
Refriger-
ant piping
∗
243
∗
166
∗
156
42
75
65
C
D
E
H
A
G
B
6
77
70
68
I
F
Summary of Contents for 2.5KKC
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