163
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.