Hitachi Set Free mini-HNRQ1 Series, Service Manual

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42
OPERATION
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The drain cap is used exclusively for the drain hole of the outdoor unit bottom base (φ24mm). Do not use it
for the hole of the drain adaptor.
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Use a rubber cap when securing the drain adaptor and drain cap. (No rubber cap should allow water
leakage.) After securing, ensure that there is no water leakage from the drain cap by pouring water into the
bottom base and then draining it from the drain adaptor.
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Securely fix the drain adaptor, rubber cap and drain cap at the bottom base so it does not become loose
when connecting the drain pipe.
(5) Utilization in Cold Area
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Do not use the Drain Adaptor in an area where drain water may be frozen. (If the drain water in the drain pipe
is frozen and then the drain pipe may crack.)
(A) In a snow area, water from the heat exchanger may be frozen on the surface of the bottom base. This
may lead to poor drainage. Therefore, do not use the drain adaptor in this type of area.
(B) In the drainage method, according to this manual, some of the defrost drain water dripped from the inlet
protection grille may flow out over the bottom base of the product.
To prevent this, provide a drain pan larger than the bottom surface of the product. Secure the drain pan
and the discharge pipe between the bottom part of the product and the foundation prior to discharge.
CAUTION
!
CAUTION
!