174
COMMISSIONING
ENGLISH
COMMISSIONING
If everything is going well until now, it is time to start the operation and to take advantages of
.
Before starting operation, pre-check points are described in this chapter. Some comments about
maintenance and how to do troubleshooting are presented.
Check List before Starting Operation
CAUTION
!
Turn off the power before changing wiring or handling product.
No Category Item Check Point
1
Electricity
Field wiring
• All switches having contacts for different poles should be wired
tightly according to regional or national legislation.
• Only qualified person can proceed wiring.
• Wiring and local-supplied electric parts should be complied with
European and regional regulations.
• Wiring should be following the wiring diagram supplied with the
product.
2
Protective devices
• Install ELB (earth leakage breaker) with 30 mA.
• ELB inside the control box of the unit should be turned on before
starting operation.
3
Earth wiring
• Earth should be connected. Do not earth to gas or city water pipe,
metallic section of a building, surge absorber, etc.
4
Power supply • Use dedicated power line.
5
Terminal block wiring
• Connections on the terminal block (inside the control box of the unit)
should be tightened.
6
Water
Charged water
pressure
• After water charging, the pressure gauge (in front of the unit) should
indicate 2.0~2.5 bar. Do not exceed 3.0 bar.
7
Air purge
• During water charging, air should be taken out through the hole of
the air purge.
• If water does not splash out when the tip (at the top of the hole) is
pressed, then air purging is not completed yet. If well purged, the
water will splash out like fountain.
• Be careful when testing air purge. Splashed water may make your
dress wet.
8
Shut-off valve
• Two shut-off valves (located at the end of water inlet pipe and water
outlet pipe of the unit) should be open.
9
By-pass valve
• By-pass valve should be installed and adjusted to secure enough
water flow rate. If water flow rate is low, flow switch error (CH14)
can be occurred.
10
Product
Installation
Hang to the wall
• As the unit is hung on the wall, vibration or noise can be heard if the
unit is not fixed tightly.
• If the unit is not fixed tightly, it can fall down during operation.
11
Parts inspection • There should be no apparently damaged parts inside the unit.
12
Refrigerant leakage
• Refrigerant leakage degrades the performance. If leakage found,
contact qualified LG air conditioning installation person.
13
Drainage treatment
• While cooling operation, condensed dew can drop down to the
bottom of the unit. In this case, prepare drainage treatment (for
example, vessel to contain condensed dew) to avoid water drop.
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