Cut Off The Spin Closure; Disconnect Internal Control Wiring; Connect Piping - Daikin CHPE Series Installation Instructions Manual

8.2 Cut Off The Spin Closure

• This coil is shipped containing gas under 150 P.S.I.G. Re-
lease pressure from the gas piping pressure-release device
before initiating piping work.
Sharp object
(2) Push
Detail
Pressure
release device
Gas piping
Liquid piping
• Using a tube cutter, cut off the factory spun end of both
the liquid and gas line piping.
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
infiltrating the piping, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant to
get mixed into the refrigerant circuit. If an refrigerant gas leaks
while working on the unit, immediately ventilate the room.

8.3 Disconnect Internal Control Wiring

• Disconnect the control panel wiring from component wir-
ing using the EEV, pressure sensor and thermistor connec-
tors located on the outside of the control panel. See Figure
7.
• Remove the control panel. The control panel is detached
from the front panel by removing the fourn mounting
screws located on the four corners of the control panel.
• Remove the top front panel.
Cap
After the work is finished,
Reinstall cap.
(1) Remove
Front panel
Figure 6

8.4 Connect Piping

• Slide bottom front panel along field tubing while cautiously
guiding component wiring back through panel wire-way. (See
Figure 8.)
• Braze up to the field piping fitting port while cooling the sen-
sor, EEV, service valve and the thermal insulation. Braze joints
should be made only with the connectors provided external to
the cabinet. Do not alter the cabinet nor braze inside the cabi-
net. To avoid overheating after brazing, quench all brazed joints
with water or a wet rag.
NOTE: To prevent damage caused by heat when brazing the field
piping, cover the pipe insulation, the internal wiring, and the ther-
mal sensors inside the insulation with a damp cloth. Otherwise,
the sensors, EEV and service valve may be damaged by heat of
brazing, which leads to a failure of normal operation.
INTERNAL WIRING
6
INTERNAL WIRING CONNECTOR
(EEV, PRESSURE SENSOR, AND
THERMISTER)
Figure 7
FIELD PIPING
FITTING PORT
(BRAZED)
FIELD PIPING
Figure 8