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6 - START-UP
PRELIMINARY CHECKS
Checks before the unit starting-up.
√
Preliminary checks - unit OFF power supply
1
safe access
2
functional clearances
3
air flow: free return and supply
(no bypass, no stratification)
4
structure integrity
5
the fans turn freely
6
unit on antivibrations
7
unit input water filter + shut-off valves for cleaning
8
antivibrating joints on water connections
9
expansion tank
(indicative volume = 5% of system content)
10
cleaned system
11
loaded system + possible glycoled + corrosion
inhibitor
12
system under pressure
13
vented system
14
Refrigerant circuit visual check
15
earthing connection
16
power supply features
17
electrical connections by customer
START-UP SEQUENCE
√
Start-up sequence - unit ON power supply
Compressor cranckase resistances operating at
least since 8 hours
1
No-load voltage measure 2
Phase sequence check 3
Pump manual start-up and flow check 4
Unit ON 5
Measure of full load voltages and absorptions 6
Check of liquid light (no bubbles) 7
Check of all fan operating 8
Return and supplì water temperature measure 9
Super-heating and sub-cooling measure 10
Check that no anomalous vibrations are present 11
Date- hour setting 12
option settings 13
Set-point personalization 14
Scheduling personalization 15
Complete and available unit documentation 16
Operations to perform for the unit start-up.
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