8. Test Run
19 _ Air-to-Water Heat Pump
Part 2. Desing and installation
8.2 Check List before Starting Operation
Turn off the power before changing wiring or handling unit.
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.
2 Protective devices • Install ELB (earth leakage breaker) with 30 mA.
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 of the unit) should be
tightened.
6
Water
Charged water pressure
• After water charging, the pressure gage (in front of the unit) should
indicate 200~250 kPa. Do not exceed 300 kPa.
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 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.
9
Unit Installation
Parts inspection • There should be no apparently damaged parts inside the unit.
10 Refrigerant leakage
• Refrigerant leakage degrades the performance. If leakage found,
contact qualified LG air conditioning installation person.
11 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.
To Next Page
Loading...
Need help?
General