HAWAIR – Installation Operation Manual (IOM HAW 01 N 3GB)

8.3. INSTALL THE CONNECTION PIPE

1. Align the center of the piping flare with the relevant valve.

2. Screw in the flare nut by hand and then tighten the nut

with spanner and torque wrench:

Firstly connect the connection pipe to the unit, then to the outside unit; pay attention to the piping bending, do not

damage the connection pipe; the joint nut couldn't tighten too much, otherwise it may cause leakage.

HEX NUT

DIAMETER

TIGHTENING

TORQUE

6 15-20 Nm

9.52 31-35 Nm

12 50-55 Nm

16 60-65 Nm

19 70-75 Nm

Indoor unit pipe

Connection nut

Pipe by contractor

Torque wrenchSpanner

8.4. EXTERNAL WATER PIPE CONNECTION SKETCH

8.4.1. PIPE CONNECTION SKETCH

FAN COIL (Rear view)

Two-Way valve

provided by contractor or installer

Connection nut

provided by factory

Connection pipe

provided by contractor/installer

Water inlet/outlet pipe

Ø=12mm

Indoor unit pipe

Connection nut

Pipe by contractor

Torque wrench

Wrench

8.4.2. MOTORIZED VALVE

All units must be equipped with a motorized valve because of the following main reasons

1. There would be a water flood risk for some units without motorized valves in the event that they stop

under the cooling conditions

2. Under the cooling and heating conditions, energy loss would happen to the chilled water and hot water.

² The pipe must be wrapped by heat insulation material to prevent condensing water drips.

² It is prohibited to bind directly the water valve wire and sponge up with the copper tube, as there

would be probably a short circuit or even electric leakage. The right way is letting the water valve

wire go through the pipe sleeve and then binding the sponge and pipe sleeve.

² It is prohibited to put the valve core upside down.

Note