McQuay 5CEY40ER Installation Manual page 15

BELOW INFORMATION IS APPLICABLE FOR 5SLY40/50ER ONLY
1. Handling
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.
2. Refrigerant piping
Z
W
Y
X
Figure 2a
A total of 4 direction options (refer figure 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.
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.
3. Caution for handling service port
To be able to recover all remaining refrigerant at charge hose,
always use a flexible 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.
Figure 1
Figure 2b
Figure 2c
Figure 3
1-13
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
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.
Figure 4