Samsung EHS AE050RXYDEG/EU Manual page 182

10. Maintenance
– Make sure the water from the relief valve is clean. If it contains foreign objects or dust:
Open the valve until the drained water contains no more foreign objects.
Flush and clean the entire tank, including the piping between the relief valve and the cold water inlet.
– Check after the tank heat cycle to make sure this water is coming out of the tank.
Descaling
• Depending on the water quality and set temperature, scale may be attached to the heat exchanger inside the domestic
hot water tank, which may decrease the heat transfer efficiency. For this reason, it may be necessary to periodically
descale the heat exchanger.
Glycol
• Record and check the glycol concentration and the pH-value in the system at least once a year.
• A Ph-value below 8.0 indicates that a significant portion of the inhibitor has been depleted and that more inhibitor
needs to be added.
• When the Ph-value is below 7.0 then oxidation of the glycol occurred, the system should be drained and flushed
thoroughly before severe damage occurs.
• Make sure that the disposal of the glycol solution is done in accordance with relevant local and national regulation.
Recharging refrigerant
The heat pump unit is provided to the market with the correct amount of refrigerant (factory charge).
There can be loss of refrigerant compared to the initial factory amount by service work done to the refrigerant circuit only
or via unintended leakage (via the service valve or a defect).
To let the unit operate correctly, the correct amount of refrigerant as designated by Samsung must be maintained in the
refrigerant circuit.
The correct procedure for how to add an amount of refrigerant by a certified engineer is described hereafter:
WARNING
• R32 Shall be charged in the liquid phase.
• The charging ports shall be used for recharging the refrigerant circuit.
Recovery refrigerant procedure
The Mono HT Quiet or Mono HT are not equipped with valves, please make use of ball valves between circuit and hoses of
the manifold.
1 Weigh the recovery cylinder and recovery unit on beforehand. Connect the manifold to the refrigerant circuit with
closed ball valves at the high pressure side (red) and low pressure side (blue), also to the vacuum pump via the yellow
line. Connect the recovery unit to both the manifold and the empty recovery cylinder (placed on a digital scale).
Installer reference guide / Mono tank integrated type 181