Flow Switches And Solenoid Valves - LG Multi V water mini Series Installation Operation & Maintenance

WATER CIRCUIT INSTALLATION

Flow Switches and Solenoid Valves

• The flow switch must be installed at the horizontal pipe of the water source unit's heat
water-supply outlet. Verify the direction of the water flow before installation. (Picture 1)
• Remove the jumper wire and connect to the communication terminals (4[A] and 4[B]) of
the water source unit's control box. (Pictures 2, 3) Open the flow switch cover and check
the wiring diagrams before connecting the wires. Wiring methods can vary by flow switch
manufacturer.
• If necessary (and after consulting with an LG representative), use the flow rate detection
contact to adjust flow rate to within the minimum range. (Picture 4)
Minimum flow rate range of this product is 50%. Adjust the flow switch to the contact
point when the flow rate reaches 50%.
(Minimum flow rate range is 50%; Reference flow rate: 3-ton - 10.6 gpm, 4-ton - 13.2
gpm, 4.4-ton - 15.9 gpm.)
Note:
• If the product operates while the flow switch contact point is out of the
permitted range, it can result in performance deterioration or system failure.
• A normally closed type of flow switch must be used.
Solenoid Valves (Optional)
Solenoid valves may be installed to shut off water flow to the water source unit when the
unit turns off. Solenoid valves are field supplied, must be rated for 208-230V, and shall be
wired to terminals L1 and L2 on the water source unit PCB.
Note:
Field-supplied solenoid valve must be a normally closed type.
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Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Picture 1
Picture 1
Picture 2
Picture 2
3(B) 4(A) 4(B)
Picture 3 Picture 3
Picture 4