Functions To Be Implemented Locally - Toshiba HWS-P805HR-E Installation Manual

Air to Water Heat Pump
13
Functions to be
implemented
locally
 Handling existing pipe
When using the existing pipe, carefully check for the
following:
• Wall thickness (within the specified range)
• Scratches and dents
• Water, oil, dirt, or dust in the pipe
• Flare looseness and leakage from welds
• Deterioration of copper pipe and heat insulator
Cautions for using existing pipe
• Do not reuse a flare nut to prevent gas leaks.
Replace it with the supplied flare nut and then
process it to a flare.
• Blow nitrogen gas or use an appropriate means to
keep the inside of the pipe clean. If discolored oil or
much residue is discharged, wash the pipe.
• Check welds, if any, on the pipe for gas leaks.
When the pipe corresponds to any of the following, do
not use it. Install a new pipe instead.
• The pipe has been opened (disconnected from
Hydro unit or outdoor unit) for a long period.
• The pipe has been connected to an outdoor unit that
does not use refrigerant R22, R410A or R407C.
• The existing pipe must have a wall thickness equal
to or larger than the following thicknesses.
Reference outside
diameter (mm)
Ø9.5
Ø15.9
Ø19.0
• Do not use any pipe with a wall thickness less than
these thicknesses due to insufficient pressure
capacity.
23-EN
Wall thickness (mm)
0.8
1.0
1.0
– 23 –
 Recovering refrigerant
• Before recovering the refrigerant in the existing
system, perform a cooling operation for at least
30 minutes.
Procedure
1. Drain off the water in the Hydro unit or turn on the
water pump manually. (See operation check mode)
2. Turn on the power of the air to water heat pump.
▼ HWS-P805HR-E, HWS-P1105HR-E
Set SW804 on the P.C. board of the outdoor unit to
all OFF, and then press SW801 for 1 second or
more. The air to water heat pump enters the forced
cooling mode for up to 10 minutes.
▼ HWS-P805H8R-E, HWS-P1105H8R-E,
HWS-P1405H8R-E
Ensure the LED display shows the initial state. If not
then please ensure to return it to the initial state.
Push and hold down SW800 for at least 5 seconds.
D804 will start slowly flashing. Push SW800 until the
LED display becomes as follows. Push SW801, then
D805 will start flashing. Push and hold down SW801
for at least 5 seconds. D804 will start slow flashing
and D805 will change to on. The air to water heat
pump enters the forced cooling mode.
D800 D801
: Go OFF
3. Operate or handle the valve to recover refrigerant
during this time period.
4. Upon completion of refrigerant recovery,close the
valve.
▼ HWS-P805HR-E, HWS-P1105HR-E
Press SW801 for at least 1 second to stop operation.
▼ HWS-P805H8R-E, HWS-P1105H8R-E,
HWS-P1405H8R-E
Press and hold down SW800 and SW801 at the
same time for at least 5 seconds to stop operation.
5. Turn off the power.
Installation Manual
D802 D803 D804
: Go ON : Flash (5 times/sec)