Samsung AE050RXYDEG Installation Manual page 25

• Before installing/commissioning the unit, make sure to check the following points :
CAUTION - The maximum water pressure of the unit is 2 . 9 bar static pressure .
- The operating range of leaving water temperature is 15~65˚C at heating conditions and 5~25˚C at cooling
conditions .
- The minimum required water flow for operation is 16 liters/min . At all times the required water flow-rates
should remain . Otherwise, the unit can stop due to a lack of water .
- Water quality must be according to EN directive 98/83 EC .
- 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 .
- Never use Zn-coated parts in the water circuit .
- 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 necessary .
- Charging : Charge the water until a pressure of 1 . 5 ~2 . 0 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 remain 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 removeall air in the
circuit, and a make-up water assembly allows water into the system continuosly .
- 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 ESP 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 .
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