Preliminary checks
Unit OFF power supply
Yes / No
1
safe access
2
suitable frame to withstand unit weight + people weight
3
functional clearances
4
air flow: correct return and supply (no bypass, no stratification)
5
considered level to be reachable by snow
6
considered main winds
7
lack of chimneys/corrosive atmospheres/pollutants
8
structure integrity
9
fans run freely
10
unit on vibration isolators
11
The unit must be level.
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
refrigerant circuit visual check
20
earthing connection
21
power supply features
22
remote On-Off
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