Function
Automatic address resetting for twin systems
•
• •
•
This clears the current twin addresses which have been set automatically, and causes automatic twin address setting to be
carried out once more.
Procedure: Press the ADDRESS RESET switch SW3 (push button switch) on the outdoor unit circuit board continuously until LEDs 2 to 8 on
the outdoor unit circuit board are all illuminated (takes approx. 3.5 seconds).
Operation: The outdoor unit will reset the addresses for the indoor units which it is connected to, and will send an instruction to carry out
automatic address setting again. If the indoor unit DIP switches have not been manually set for twin address setting, the indoor
units receive this command and they then clear their existing settings and carry out automatic address setting.
If an indoor unit has had its address set by the DIP switch (DIP switch 1-8 is ON), or if the remote control unit is connected to one
of the indoor units, then the addresses for those indoor units cannot be reset.
•
• •
•
The indoor units will not run for approximately 1 minute while automatic twin address resetting is being carried out.
•
• •
•
Do not turn off the power supply for at least 1 minute after automatic twin address resetting has been carried out.
18.2. Piping connections
•
• •
•
The following table shows the pipe diameters for a twin-type system.
Outdoor unit main pipe diameter (mm) Indoor unit combinations
43BB Indoor unit capacity (HP) 24BD 24BD
Liquid side: ø 9.52 Branch pipe
diameter
Liquid side ø 6.35 ø 6.35
Gas side: ø 19.05 Gas side ø 15.88 ø 15.88
•
• •
•
The following table shows the equivalent pipe lengths and height differences for twin-type systems
Equivalent length L + la + lb Within 50 m
Branch pipe diameter la, lb Within 15 m
Branch pipe difference la - lb Within 10 m
Height difference H1 Within 30 m Height difference between indoor units H2 Within 1 m
NOTE:
1. Use the main pipe to gain any rise or fall required for the pipes.
2. The number of bends should be 8 or less in a single system (L + la, L + Ib), and 15 or less overall.
3. Branch pipes should be positioned horizontally.
68
To Next Page
Loading...
Need help?
General
