ESIE17-19C
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Part 3. Repair
3.1. Refrigerant repair procedures
19/08/19
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Version 1.1
Page 67
Optimized Heating 4
Figure 3-2: 3 service ports at the stop valves
3.1.3. Refrigerant pump down
This unit is equipped with an automatic pump down operation which will collect all refrigerant from the field piping and indoor unit
in the outdoor unit. To protect the environment, make sure to perform the following pump down operation when relocating the unit.
3.1.3.1. Small outdoor unit
1. Remove the valve lid from liquid stop valve and gas stop valve.
2. Carry out pump down operation.
1. Vacuum pump
2. To recovery pump
I
NFORMATION
See instruction of the recovery pump supplier how to recover the refrigerant.
W
ARNING
: R
ISK
OF
EXPLOSION
• When the refrigeration circuit has a leak, do not execute pump down with the compressor.
• Use recovery system into separate cylinder.
• Warning, explosive hazard exists when executing pump down.
• Pump down with compressor can lead to self-combustion due to air entering during pump down.
I
NFORMATION
Some outdoor units are equipped with a low pressure switch to protect the compressor by switching it off.
Never short-circuit the low pressure switch during pump down operation!
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