Specifications

65
66
Twinning on the outdoor unit side
• The tilt angle of the twinning pipe
The tilt angle of the twinning pipe must be within ±15 ° with the horizontal plane.
Tilting the twinning pipe more than specified will cause damage to the unit.
• The piping connection
When connecting the twinning kit to the outdoor unit, note the following:
If the length of piping from the twinning kit to the outdoor unit is more than 2 m [6 ft.], install a trap
within 2 m [6 ft.] from the outdoor unit. The height of the trap must be 200 mm [7 in.] or higher.
Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards (towards the
twinning pipes).
• The length of the straight part of the pipe before the
branching
For the twinning kit, always use the accessory piping
parts.
The length of the straight part of pipe connected in
front of the twinning pipe must be 500 mm [19 in.] or
longer.
(Connect the field piping so that the length of the
straight part of pipe connected in front of the twinning
pipe can be 500 mm [19 in.] or longer.)
If the length is less than 500 mm [19 in.], it will cause
damage to the unit.
When installing the twinning kit in a higher position than the outdoor unit base, make sure that the
twinning kit is installed in a position lower than 200 mm [7 in.] from the outdoor unit base.
Reducer
±
15
°
The tilt angle of the reducer should be
within
± 15 ° with the horizontal plane.
Note: See the following drawing for the fitting
position of the twinning pipe.
To Indoor unit
Less than 2 m [6 ft.]
To Indoor unit
2m
200 mm [7 in.]
or over
Trap
(gas pipe only)
<2 m [6 ft.] or less>
<More than 2 m [6 ft.]>
To Indoor unit
Do not install traps other than the ones between outdoor units described on a separate sheet to prevent oil
backflow and compressor start-up failure.
Caution
•
Do not install solenoid valves to prevent oil backflow and compressor start-up failure.
•
Do not install a sight glass because it may show improper refrigerant flow.
If a sight glass is installed, inexperienced technicians that use the glass may overcharge the refrigerant.
•
<PUHY-P500YSHA>
Outdoor unit 1 Outdoor unit 2
200 mm [7 in.]
or less
Twinning pipe1
To Indoor unit