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MULTI V Water IV
7. Device protection unit
7.2 Flow switch work
•
The flow switch must be installed at the horizontal water pipe of the outside unit outlet connection.
(Flow switch acts as the 1st protection device when the heat water is not supplied. If a certain level of water does
not flow after installing the flow switch, an error sign of CH24 error will be displayed on the product and the
product will stop operating.)
•
When setting the flow switch, it is recommended to use the product with default set value to satisfy the minimum
flow rate of this product.
(The minimum flow rate range is 50% of product rated water flow. Refer to the specification of each model)
•
Select the flow switch with the permitted pressure specification considering the pressure specification of the heat
water supply system.
(Control signal from outside unit is AC 220V.)
7.3 Installation of flow switch
•
The flow switch must be installed at the horizontal pipe of the heat water supply outlet of the product and check
the direction of the heat water flow before the installation. (Picture 1)
•
When connecting the flow switch to the product, remove the jump wire to connect to the communication terminal
(5(A) and 5(B)) of the outside unit control box. (Picture 2, 3) (Open the cover of the flow switch and check the
wiring diagram before connecting the wires. The wiring method can differ by the manufacturer of the flow switch.)
•
If necessary, adjust the flow rate detection screw after consulting with an expert and adjust to the minimum flow
rate range. (Picture 4) (Minimum flow rate range of this product is 50%. Adjust the flow switch to touch the
contact point when the flow rate reaches 50% of the flow rate.)
– Refer to the specification of each model.
Picture 1
Heat Pump
Picture 2
Cover
Micro-switch
Adjustment screw
Vibration plate
Bellows
1 inch or
3/4 inch
socket
Pad
Picture 3
Installation of Outside Units
Picture 4
17
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