Installer reference guide / Mono tank integrated type 62
6.2 Connecting water piping
About the piping work
Water connections must be made in accordance with the Water Piping and Wiring diagram delivered with the unit,
respecting the water inlet and outlet. If air, moisture or dust gets in the water circuit, problems may occur. Therefore,
always take into account the following when connecting the water circuit:
• Use clean pipes only.
• Hold the pipe end downwards when removing burrs.
• Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
• Use a good thread sealant for the sealing of the connections.
• The sealing must be able to withstand the pressures and temperatures of the system.
When using non-brass metallic piping, make sure to insulate both materials from each other to prevent galvanic
c
orrosion.
• Because brass is a soft material, use appropriate tooling for connecting the water circuit.
Inappropriate tooling will cause damage to the pipes.
CAUTION
• Be careful not to deform the unit piping by using excessive force when connecting the piping.
Deformation of the piping can cause the unit to malfunction.
• Always use two wrenches (spanners) for tightening or loosening the water connections, and tighten
connections with a torque wrench as specified in below table. If not, connections and parts can be
damaged and leak.
• The unit is only to be used in a closed water system. If applications are in open water circuit, it will
generate heat exchangers fouling, corrosion, leak.
Name Tightening torque
BSPP1 350~380 kgf•cm 34~37N•m
Connecting the water pipes
Connecting the water piping typically follow the below procedure:
1 Connecting the water piping to the outdoor unit.
2 Connecting the water piping to the indoor unit.
3 Connecting the recirculation piping.
4 Connecting the drain hose to the drain.
5 Filling the water circuit.
6 Filling the DHW tank.
7 Insulating the water piping.
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