Piping Connection - Hisense Hi-FLEXi S Series Technical, Installation, Maintenance

4.4 Piping Connection

Perform piping connection for each outdoor unit.
NOTE:
Ensure that the refrigerant pipes are connected to a unit in the same refrigerant cycle.
● Prepare the refrigerant pipe in the field for the piping work.
● Piping Direction
Fix the pipes adequately in order to avoid vibration and excessive force to the valve.
(1) The pipes are available to connect in three directions from the bottom base.
Front side: gash the piping cover 1 with a boxcutter and connect directly through the service lid at the front unit.
Bottom side: connect directly from the piping cover 2 on the bottom base
Rear side: connect from the piping cover 2 on the bottom base, then pass through the bottom base to open a hole and
connect.
(2) Operation of the stop valve should be performed according to Item 4.4.1.
(3) If the piping is connected from the front side, completely seal the connecting piping with insulation pipe in order to
prevent the ingress of water or snow into the conduit.
(4) If the piping is connected from the bottom or rear side, completely seal the pipe passing through the bottom of outdoor
unit with insulation conduit in order to prevent ingress of water or snow into the conduit.
Front Side
Piping Cover 1
Bottom Base
Liquid Piping
Gas Piping
(High/Low Pressure)
Gas Piping
(Low Pressure)
Packing
Guard Plate
Seal
Rubber Bush
Apply insulation and check
that no clearance exists.
Rear Side
Bottom Side
Transmission Wiring
Power Supply Wiring
Seal
Rubber Bush
Conduit
Seal
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Refrigerant Piping Work