Features Of Heating Operations; Basic Principles And Performances; Defrosting - Harbor Point HF-25GW Installation, Operation And Maintanance Manual

OPERATION SECTION FOR

Features of Heating Operations

Important:
Heating operation will cease at ap-
proximately 15° F outdoor tempera-
ture due to a sensor located in the
outdoor unit. This product does not
contain supplemental electric heat,
therefore other means of heat need to
used when this system ceases opera-
tion at low outdoor ambients.

Basic principles and performances

• The Heat Pumps absorb heat from the
outdoor air and transfers it indoors to
heat the indoor air. The heating capa-
bilities through this principle go up/down
with the increase/decrease of the tem-
perature of the outdoor air.
• When the outdoor air temperature is very
low, the system can be used together
with other heating devices. Good ven-
tilation should be maintained to ensure
safety and prevent accidents.
HF-25/HF-35 & HFR-25/HFR-35

Defrosting

When the outdoor air temperature is very
low and humidity is very high, frosting will
occur in the heat exchanger of the outdoor
unit, which has negative impacts upon the
efficiency of the heating performance. In
this case, the automatic defrosting function
will come into play. The heating operation
will be stopped for 5-10 minutes to do the
defrosting.
• The fans of both the outdoor and indoor
units are stopped. During the defrosting
operation, the run light will flash slowly.
• During defrosting, the outdoor unit might
generate some steam. It is caused by
fast defrosting, which is not a perfor-
mance failure.
• Upon the completion of the defrosting pro-
cess, the heating operation is resumed.
24