Preliminary checks
Unit power supply OFF
Yes / No
1
safe access
2
suitable frame to withstand unit weight + people weight
3
functional clearances
4
condensaon drain
5
air flow: correct return and supply (no bypass, no stratification)
6
considered level to be reachable by snow
7
considered main winds
8
Lack of chimneys/corrosive atmospheres/pollutants
9
Structure integrity
10
Fans run freely
11
Unit on vibration isolators
12
Unit input water filter + shut-off valves for cleaning
13
vibration dampeners on hydraulic connections
14
expansion tank (recommended volume = 10% system content)
15
minimum system water content
16
clean system
17
loaded system + possible glycol solution + corrosion inhibitor
18
System under pressure + vented
19
TW temperature probe: installed, hydraulically connected
20
refrigerant circuit visual check
21
earthing connection
22
power supply features
23
Remote On-Off: electrical connected, configuration
24
Modular unit only:
bus connecon, unit addressing, controller addressing, TW probe on master
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