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English
5.
REFRIGERANT PIPING WORK
Observe the requirements listed below for refrigerant tubing
sizes.
Liquid
Gas
Model
Tubing Size
CXTQ24/36/48/60
3/8"
5/8"
Completely insulate both the liquid and gas refrigerant piping in
order to prevent condensation and possible water damage.
Failing to insulate the pipes may cause leaking or burns. Be
sure to use the insulation which can withstand such tempera-
tures of 250°F (120°C) or more. Reinforce the insulation on the
refrigerant piping according to the installation environment. If
environmental conditions may reach 86°F and 80%RH, con-
densate may form on the surface of the insulation. To prevent
condensate leakage, reinforce the refrigerant piping insulation
according to the installation environment.
Follow the points below.
•
Use a tube cutter and flaring block suitable for the type or
refrigerant.
•
To prevent dust, moisture or other foreign matter from infil-
trating the piping, either pinch the end or cover it with tape.
•
Do not allow anything other than the designated refrigerant
(such as air) to get mixed into the refrigerant circuit. If any
refrigerant gas leaks while working on the unit, immediately
ventilate the room.
5.1 Cut off the spin closure.
•
This coil is shipped containing gas under 150 P.S.I.G.
Release pressure from the gas piping pressure-release device
before initiating piping work
Detail
Cap
After the work is finished,
Replace cap.
Sharp object
Gas piping
Front panel
Liquid piping
Pressure
release device
(2) Push
(1) Remove
Figure 5
•
Using a tube cutter, cut off the factory spun end of both the
liquid and gas line piping.
5.2 Disconnect Internal Control Wiring
•
Remove the left panel.
•
Disconnect the Control Panel wiring from component wiring
using the EEV and Thermistor connectors located on the
outside of the control panel. See Figure 6.
To prevent component wiring damage, the Control Panel
should be removed from the right front panel. Removing the
control panel will assist in allowing the wiring to be safely
pushed through the panel wire-way. The control panel is
detached from the left front panel by removing the four
mounting screws located on the four corners of the control
panel.
Internal Wiring Connectors
(EEV and Thermister)
Figure 6
