Installation Details; Wrench Torque Sheet For Installation; Connecting The Cables; Pipe Length And The Elevation - Pioneer WYC009AMFI20 Service Manual

6 Installation Details

6.1 Wrench torque sheet for installation

Outside diameter Torque
Ф6.35mm 1/4in 1500N.cm(153kgf.cm)
Ф9.52mm 3/8in 2500N.cm(255kgf.cm)
Ф12.7mm 1/2in 3500N.cm(357kgf.cm)

6.2 Connecting the cables

The power cord should be selected according
to the following specifications sheet.
Appliance Amps
10
13
18
25
30
The cable size and the current of the fuse or
switch are determined by the maximum
current indicated on the nameplate which
located on the side panel of the unit. Please
refer to the nameplate before selecting the
cable, fuse and switch.

6.3 Pipe length and the elevation

Models
WYC009AMFI20
WYC012AMFI20
Standa
Models
length
7.5m
WYC009AMFI20
(24.6ft)
Additional tightening
torque
1600N.cm(163kgf.cm)
2600N.cm(265kgf.cm)
3600N.cm(367kgf.cm)
AWG Wire Size
18
16
14
12
10
Pipe size
Gas
3/8in
(Ф9.52mm) (Ф6.35mm)
1/2in
(Ф12.7mm) (Ф6.35mm)
Max.
Max. Additional
rd Length
Elevation refrigerant
A
10m 25m
(32.8ft) (82.0ft)
WYC012AMFI20

6.4 Installation for the first time

Air and moisture in the refrigerant system have
undesirable effects as below:
● Pressure in the system rises.
● Operating current rises.
● Cooling or heating efficiency drops.
● Moisture in the refrigerant circuit may
freeze and block capillary tubing.
● Water when mixed with the refrigerant and
oil will create an acid that will damage the
motor windings and components in the
refrigerant system.
Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak
tested and evacuated to remove gas and
moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral
detergent on the indoor unit connections or
outdoor unit Connections with a soft brush to
check for leakage of the connecting points of
the piping. If bubbles come out, the pipes have
leakage.
1. Air purging with vacuum pump
Liquid
1/4in
1/4in
15g/m
1) Completely tighten the flare nuts of the
(0.16oz/ft)
indoor and outdoor units, confirm that both
the 2-way and 3-way valves are set to the
12
7.5m 10m 25m
(24.6ft) (32.8ft) (82.0ft)
15g/m
(0.16oz/ft)