Commissioning; Check List Before Starting Operation - LG HM121HF UB60 Installation Manual

COMMISSIONING

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COMMISSIONING
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
1
Electricity
2 Protective devices
3
4
5
6
7
Water
8
9
1
0
11
Product
Installation
12 Refrigerant leakage
13 Drainage treatment
Item
• All switches having contacts for different poles should be wired tightly
according to regional or national legislation.
• Only qualified person can proceed wiring.
Field 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.
• Install ELB (earth leakage breaker) with 30 mA residual current.
• ELB of Backup heater located inside of Hydro unit should be turned on
before starting operation.
• Earth should be connected. Do not earth to gas or city water pipe,
Earth wiring
metallic section of a building, surge absorber, etc.
Power supply • Use dedicated power line.
Terminal block • Connections on the terminal block (inside the control box of the unit)
wiring should be tightened.
Charged water • After water charging, the pressure gauge (in front of the unit) should
pressure indicate 2.0~2.5 bar. Do not exceed 3.0 bar.
• During water charging, air should be vented through air purges until
water is spilling out. After all air is released, check to close all air vents
Air purge
tightly. There should be no noise caused by circulating air bubbles in
any part of the system.
• Two shut-off valves (Field supply) - located at the end of water inlet
Shut-off valve
pipe and water outlet pipe of the unit) should be open.
• A device that ensures the minimum flow rate (e.g. Bypass valve,
hydronic separator, buffer tank) should be installed and adjusted to
By-pass valve
secure enough water flow rate. If water flow rate is low, flow switch
error (CH14) can occur.
• As the unit is hung on the wall, vibration or noise can be heard if the
Hang to the wall unit is not fixed tightly.
• If the unit is not fixed tightly, it can fall down during operation.
Parts inspection • There should be no apparently damaged parts inside the unit.
• Refrigerant leakage is a serious danger.
If leakage found, contact qualified LG air conditioning installation
person.
• 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.
Check Point