7 Check list
7.1 Checking the piping installation
Before filling the heating system, check the piping installation according to the checklist below.
Warning Make sure there is a flow guard installed! Otherwise the system will
not be able to function at all.
Piping checklist Yes No
Is there a flow guard installed?
Is there a magnetite filter installed?
Are the pipe connections in accordance with the connection diagram?
If flexible hoses are used, are they installed on the supply and return lines on the outdoor unit?
Is the strainer on return line mounted?
Is an expansion vessel installed?
Is a valve-pipe with safety valve and manometer installed?
Is a volume tank installed? See Volume tank table below
Is a filler cock with non-return valve heating system installed?
If the heating system itself holds the amount of water described in the table, a volume tank is not needed, but recommended.
If the amount of water in the heating system is not sufficient, alarms
may occur.
For iTec XT Total, also check:
Water heater checklist
Yes No
Bleed valve installed
For iTec XT Standard, also check:
External Water heater checklist
Yes No
Exchange valve installed
7.1.1 Check list before commissioning the unit
Caution Before commissioning the unit, make sure to check the following
points :
▪
The operating range of leaving water temperature is 25~65˚C at heating conditions and 5~25˚C at cooling conditions.
▪
The minimum required water flow for operation is 7 liters/min. At all times the required water flow-rates should remain. Otherwise,
the unit can stop due to a lack of water.
▪
Do not operate the system with closed valves because it results in damaging the heat pump.
Installation Guide
iTec XT
AWIXT01IG0102 Thermia AB
56
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