Installation Instructions

12
Installation (Cont.)
After Sales Support
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Fig.15
Air purging with a vacuum pump
After having connected the indoor and
outdoor units, make sure all pipes have
been properly connected, then bleed the
air and humidity from the refrigerant circuit
by following the below steps.
1. Remove the charging port cap and
connect the manifold gauge and the
vacuum pump to the charging valve by
service hoses, as illustrated (Fig.15).
2. Open the valve of the low pressure side
of the manifold gauge, then run the
vacuum pump. Vacuum the indoor unit
and the connecting pipes for about 10
minutes until the pressure in them has
dropped to below 1.5mmHg. When
the desired vacuum has been reached,
close the low pressure valve of the
manifold gauge and stop the pump.
3. Disconnect the service hoses and fit
the cap to the charging valve.
4. Remove the blank caps and fully open
the spindles of the 2-way and 3-way
valves with a service valve wrench.
5. Tighten the blank caps of the 2-way and
3-ways valves, applying the appropriate
torque as listed on page 11 (Table 1).
Adding refrigerant
Refrigerant must be added if the piping
measures more than 5 metres in length.
This operation can only be performed by a
professional technician. For the additional
amount of refrigerant required, see the
Table 2 below.
Table 2:
Piping length: 5m x 30g
(or 16ft x 0.3oz)
Piping length: 5m x 65g
(or 16ft x 0.7oz)