Moving the outdoor unit with a fork lift
▪
Insert the fork into the wooden pallet at the bottom of the outdoor unit carefully. Be careful that the fork does not damage the
outdoor unit. Note that the side for lifting is on the compressor side, the right side when facing the front of the unit.
1. Center of gravity
2. Fastening screws
3. Fork lift side
4.3.1
Check list before installing
Before installing the unit, make sure to check the following points :
▪
The maximum water pressure of the unit is 2.8 bar static pressure.
▪
The operating range from outdoor unit is 20~70˚C in heating conditions and 7~25˚C in cooling conditions.
▪
The minimum required water flow for operation is 12 liters/min.
▪
Water quality must be according to VDI 2035.
▪
If the unit and the pipes are exposed to freezing temperature, It can cause damage to the hydraulic system. Special care must be
taken to prevent freezing of the total water system.
▪
The unit is designed to be used in a closed-loop system. Do not use any other components which are designed only for a open-loop
system.
▪
All hydraulic parts including field piping must be insulated to reduce heat loss and condensation.
▪
It is recommended to install the make-up water assembly to feed small quantities of water to the system automatically, replacing
the minor water losses and maintaining the system pressure.
▪
Drain taps must be provided at all low points of the system to permit complete drainage of the circuit for maintenance use.
▪
Make sure that the check valves are correctly installed in the system (field supply).
▪
Flush pipes out with clean water to remove contaminants in pipes during installation.
▪
The strainer(water filter) must be cleaned after flushing the pipes, and it should be cleaned periodically. Replace strainer when nec-
essary.
▪
Charging : Charge the water until a pressure of 1.0~1.5 bar by using make-up water assembly (Field supply). (The water pressure
indicated on the manometer will vary depending on the water temperature) The nominal water pressure in the system should re-
main about 1.0 bar at all times to avoid air entering the water system.
▪
Air purging; Make sure that air should be vented from the system at start-up or after installing/ servicing. The air vent valve must be
opened during charging the water (at least 2 turns) in order to remove all air in the circuit, and a make-up water assembly allows
water into the system continuously.
▪
In case that the water piping would be located in a higher position than the air vent of the unit, it is necessary to add an additional
ones in the highest position of water circuit. The air vent should be located both where water temperatures are the highest and
where the height of pipes are the highest.
▪
Always use materials which are compatible with water used in the system and with the materials used on the indoor unit.
▪
Select piping diameter in relation to required water flow and available external static pressure of the pump.
▪
Use chemical cleaning agents(Begin with acid , finish with alkali).
▪
Do not operate the system with closed valves because it results in damaging the heat pump.
Installation Guide
iTec XT
AWIXT01IG0102 Thermia AB
26
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