7-3. Maintenance during off-season
(1) If the operation needs to be stopped, to reduce the machine pressure and possibility of leakage, remove the re-
frigerant to a separate refrigerant container.
(2) To prevent intake of air into the machine, store the machine with about 5kg of refrigerant inside, and 0.5kg of ni-
trogen charged with pressure.
(3) If the temperature of the place where the machine is installed goes below 0°C frequently, to prevent freezing,
drain the chilled water, cooling water and condensed water, and the water box(room) should be left open.
(4) Leave the oil filled in the machine, and in order to maintain the minimum oil tank temperature, supply power to
the oil heater.