Toshiba HWS-P1104HR-E, Instruction Manual

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Air to Water Heat Pump
Installation Manual
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.
• Do not use any pipe with a wall thickness less than
these thicknesses due to insufficient pressure
capacity.
 Recovering refrigerant
• Use refrigerant recovery switch SW801 on the P.C.
board of the outdoor unit to recover refrigerant when
the Hydro or outdoor unit is moved.
• 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.
3. 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.
Operate or handle the valve to recover refrigerant
during this time period.
4. Upon completion of refrigerant recovery, close the
valve and press SW801 for at least 1 second to stop
operation.
5. Turn off the power.
Operation check mode
(1) Preparation
1. Turn all of the remote controllers "OFF" for the hot
water supply and heating.
2. Turn off the hydro unit and the outdoor unit.
3. Remove the front panel of the hydro unit.
4. Set SW06_2 "ON".
(2) Operation check
1. Turn on the hydro unit and the outdoor unit.
2. Rotate switch DIP SW01 to position "1" and press
tactile switch SW07 for 5 sec. or longer.
3. Rotating the rotary SW01 to position "16". The pump
P1 will start.
4. Set the DIP SW06_02 "OFF" to finish.
DANGER
Be careful of electric shock because the P.C. board has
an electrical current running through it.
Reference outside
diameter (mm)
Wall thickness (mm)
Ø9.5 0.8
Ø15.9 1.0
Ø19.0 1.0
SW801
SW804
ON
1 2 3 4
Refrigerant
recovery switch
SW801
22-EN