McQuay 5CKY20E, Installation Manual

Page: 21 / 188

1-19
English
As shown in Figure above, it is recommended to move the
unit by grabbing the left and right grip. Place your hands on
the corner to avoid deforming of the casing.
Figure 1
A total of 4 direction options (refer fi gure 2a) for connecting
pipe (w, x, y, z) are available for your convenience.
Cutting out the 2 slits with a metal saw make it possible to
install as shown in Figures 2a.
In order to make the connecting pipe in a downward direction
(refer Figure 2b), make a knockout hole by drilling through
the center area around the knockout hole.
It is recommended to use a Ø6mm drill for this process
(refer Figure 2c).
After completing the knockout process, it is recommended
to apply repair paint to the edge and surrounding surfaces to
prevent rusting.
Z
Y
X
W
Figure 2a
Figure 2b
Figure 2c
1. Handling
2. Refrigerant piping
Cover the pipe through-holes with
insulation material to conceal all gaps
to prevent small animals or insects from
entering the outdoor unit which may
result short circuit in the control box.
Figure 3
3. Caution for handling service port
To be able to recover all remaining refrigerant at charge
hose, always use a
fl exible charge hose with a push-rod and
valve. After the work, tighten the valve cover in place with
tightening torque: 11.5~13.9N.m
4. Charging refrigerant
For cases where complete recharge of refrigerant is required,
vacuuming via service part is mandatory, do not use stop valve
port in this case because vacuuming through this stop valve
port can not be executed completely.
Outdoor units have 1 port on the piping. It is between the heat
exchanger and the 4-way valve.
5. Pump-down operation
Never by-pass the low pressure switch or low pressure sensor
during pump down operation.
Power supply must be cut off before pump-down operation.
After opening the front panel, cover the PCB and terminal
board with insulation sheet to avoid electric shock by
accidental touching of LIVE parts.
Do not leave the unit unattended if the front panel is open.
Close the front panel before leaving the outdoor unit.
Turn on the power supply and carry out pumping-down
operation according to the steps written at front panel.
6. Electrical wiring work
BELOW INFORMATION IS APPLICABLE FOR 5SLY40/50FR ONLY
Figure 4
Secure the ground wire to the stop valve attachment plate
(refer Figure 4) so that it does not slide.
Ensure the front cover does not rise up after the wiring work
is down. Close the front cover securely.
1
2
1
2
Figure 5
When cables are routed from the unit, a protection sleeve for
the conduits can be inserted at the knock-out hole.
It there is no wire conduit, do protect the wires with
vinyl tubes to prevent cutting the wires by sharp edges of
knock-out hole.
1 Power supply wiring and earth wire
2 Interconnection
wire
1 EN 5CKYER-1009(1).indd 19 1 EN 5CKYER-1009(1).indd 19 4/21/11 9:11:23 AM 4/21/11 9:11:23 AM