4.2 Frost protection
■ Freezing Protection
• In areas of the country where entering water temperatures drop below specified temperature, the water pipe must be
protected by using an approved antifreeze solution.
- For Medium Temperature : below 15℃ (59℉)
- For High Temperature : below 0℃
(32℉)
•
Consult your AWHP unit or
Hydro Kit unit supplier for locally approvedsolutions in your area.
• Calculate the approximate volume of water in the system. (Except the AWHP or Hydro Kit unit.) And add antifreeze solution
to the total volume to allow for the water contained in AWHP unit or Hydro Kit unit.
• Circulate the water with the pump before dropping the temperature.
Anti freeze type
Minimum temperature for anti freezing(℃)
Med. Temp. : 15℃
High Temp. : 0℃
-5 -10 -15 -20 -25
Methanol (%) 0 6 12 16 24 30
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
<!> CAUTIONS
• Use only one of the above antifreeze.
• If a antifreeze is used, pressure drop and capability degradation of the system can occur
.
• If one of antifreezes is used, corrosion can occur. So please add corrosion inhibitor.
• Please check the concentration of the antifreeze periodically to keep same concentration.
• When the antifreeze is used (for installation or operation), take care to ensure that antifreeze must not betouched.
• Ensure to respect all laws and norms of your country about Anti-freeze usage.
• When hydro kit is applied for cooling, the antifreeze must be added in the water circuit to prevent freezing.
• Set the DIP S/W and short key to Anti Freeze mode only after the addition of brine(Anti-freeze). Or else theproduct may get
damage due to freezing and bursting.
• Do not add brine(Anti-freeze) to the water circuit when it is used for hot water.
Installation of Outdoor Unit
4. Water Control
Installation
7
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