It is crucial that the flow guard follows the direction of the water flow in order to work properly. So make sure you pay attention
on which way the arrow on the flow guard is pointing. The flow guard has to be installed on the return line to the outdoor unit.
1. Possibility of bubble formation, possibility of drain-off (measuring pipe
partly filled).
2. No danger due to accumulation of contaminants, air bubbles goes up-
stream.
3. Minimum 5 times the length of pipe diameter.
4. Possibility of drain-off, possibility of bubble formation. Make sure the
flow guard is always installed in a horizontal position.
5. Minimum 5 times the length of pipe diameter.
5.1.2 Charging water
After installation is completed, the following procedures shall be used to charge water into the outdoor unit.
▪
Connect water lines to water connections of the outdoor unit.
1. Water outlet to the heating/cooling system
2. Water inlet from the heating/cooling system
▪
Air vent valve must be open at least 2 turns so that air can be eliminated in the system.
▪
Open the shut-off & drain valve in the water supply connection.
▪
Water pressure of supply line must be between 0,8-1,5 bar for good charging work.
▪
Stop water supply when the pressure indicates around 0,8-1,5 bar.
Caution Water pipe and connections shall be cleaned by using water or cleaner
before operating the unit at first time.
Caution Considering external static pressure and water pump performance, se-
lect water plumbing specification and under floor loofs.
Caution Make sure to calculate the total resistance of piping system and deter-
mine the size of pipes before selecting the required head of pumps. If
the pressure loss of total water system is over than designed pressure,
an external water pump shall be installed on piping system in series.
Caution At initial installation or refill-installation, remove air by air vent valve in
the existing piping in the house, to prevent air trap in the system while
charging water.
Installation Guide iTec XT
Thermia AB AWIXT01IG0102
39
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