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Installation of flow switch
• The flow switch must be installed at the horizontal pipe of the heat water supply out-
let of the product and check the direction of the heat water flow before the installa-
tion. (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 con-
necting 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.)
- Reference flow rate : 29kW – 96LPM, 58kW – 192LPM)
• When the product operates while the flow switch touches the contact point at the flow rate range out of the permitted
range, it can cause product performance deterioration or serious product problem.
• Must use the normal closed type flow switch
- Circuit of outside unit is normal closed type
Product protection device
Picture 1
Picture 2
Picture 3
Picture 4
Installation Manual 31
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