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Mitsubishi Electric CAHV-P500YA-HPB Service Handbook Page 34

Hot water heat pump.
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[ II Restrictions ]
3. Installing the strainer and flow switch
(1) Installing the strainer
Install the supplied strainer on the inlet water pipe near the unit to filter out suspended solids and prevent clogging or
corrosion of the heat exchanger.
Install the strainer in a way that allows for easy access for cleaning, and instruct the user to clean it regularly.
Operating the units with a clogged strainer may cause the units to make an abnormal stop.
Select a location to install a strainer, taking into consideration the installation angle, insulation thickness, and
maintenance space.
* The dimensions given below indicate the amount of space necessary when screwing in a Y-shaped strainer.
Rc1 1/2
Y-shaped strainer
Y-shaped strainer
maintenance access space
Sample installation 1
(2) Installing a flow switch
Install a flow switch that meets the following specifications on the water pipe.
Connect the flow switch to the flow switch contact on the unit.
Minimum flow rate= 7.5 m³/h (125 L/min)
Unit usage range (water flow rate): 7.5 - 15.0 m³/h
4. Water pipe hole size and location
Min. 110
Water outlet <Rc1-1/2B>
Water inlet <Rc1-1/2B>
- 27 -
Y-shaped strainer
Y-shaped strainer
maintenance access space
Max. 25º
Sample installation 2
<Unit: mm>
Pipes (field-supplied)
Min. 110


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