Using The Unit In Sub-Freezing Or Snowy Conditions - Mitsubishi Electric CAHV-P500YA-HPB Instruction Manual

[3] Using the Unit in Sub-freezing or Snowy Conditions

In areas where temperature drops to
freezing during the periods of non-use,
blow the water out of the pipes or fill the
pipes with anti-freeze solution.
Not doing so may cause the water to freeze,
resulting in burst pipes and damage to the unit
or the furnishings.
In areas where temperature drops to freezing,
use an anti-freeze circuit and leave the main
power turned on to prevent the water in the
water circuit from freezing and damaging the
unit or causing water leakage and resultant
damage to the furnishings.
・Remove the snow off the unit before switching on the ON/OFF switch.
・In areas where the outside air drops below freezing, leave the main switch turned on even when the unit
will not be operated for four days or longer. Leave the switch on the water circulation pump turned on if
the pump is connected to a separate circuit.
・ If the unit is left turned off for a while (e.g., overnight) when the outside temperature drops below
freezing, the water in the water circuit will freeze and damage the pipes and the heat exchanger.
・ The recommended electric circuit has an anti-freeze circuit. For this circuit to function, the main
power must be turned on.
・ If the water circulation pump is connected differently from the recommended way, make sure the
circuit has some type of anti-freeze function*.
(* A function that automatically operates the water circulation pump to prevent the water in the circuit
from freezing when the water temperature drops.)
In areas where temperature can drop low
enough to cause the water in the pipes to
freeze, operate the unit often enough to
prevent the water from freezing.
Frozen water in the water circuit may cause
the water to freeze, resulting in burst pipes and
damage to the unit or the furnishings.
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