About this manual
Read all sections of this manual and keep the manual
for future reference.
WARNING: Cancer and Reproductive Harm –
www.P65Warnings.ca.gov.
Contact information
To contact us online, go to www.york.com, click Contact
Us, and follow the instructions.
To contact us by mail, use the following address:
Johnson Controls Ducted Systems
Consumer Relations
5005 York Drive
Norman, OK 73069
Certification
Safety
It is important to understand the safety symbols used in
this manual. Read safety information carefully and follow
all safety requirements.
Understanding safety symbols and
instructions
This is a safety alert symbol. When you see this
symbol on labels or in manuals, be alert to the
potential for personal injury.
Understand and pay particular attention to the signal
words DANGER, WARNING, CAUTION, as well as the
NOTICE, Important, and Note alerts.
DANGER indicates an imminently hazardous situation,
which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation,
which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation,
which, if not avoided may result in minor or moderate
injury. It is also used to alert against unsafe practices and
hazards involving only property damage.
NOTICE indicates information considered important, but
not hazard-related, such as messages relating to property
damage.
User's Information Manual: HH8 Series - 18 SEER2
Horizontal Discharge Variable Speed Heat Pump
Important indicates information that is essential to
complete a task or may result in damage to the device if
not followed.
Note indicates something of special interest or
importance. Notes can contain any type of information
except safety information.
Safety requirements
How your system works
Cooling cycle
During the cooling cycle, your system removes heat and
humidity from your home and transfers this heat to the
outdoor air.
Heating cycle, for heat pump units
During the heating cycle, your system removes heat and
humidity from the outdoor air and transfers this heat to
your home. This is possible because even 0°F outdoor air
contains a great deal of heat. Remember that your heat
pump does not generate much heat; it merely transfers it
from one place to another.
System operation
Your thermostat gives you full control of the heating and
cooling levels in your home, and can also allow you to
control these remotely using a smart device. Do not switch
your thermostat on and off rapidly or switch between
the heating and cooling mode of operation rapidly. This
could damage your equipment. Always allow at least 5 min
between changes.
Johnson Controls Ducted Systems
WARNING
Risk of fire
This unit uses a mildly flammable (A2L) refrigerant.
The unit must only be repaired or serviced by trained
service personnel. Before attempting to repair or
service the unit, consult the Installation Manual. Follow
all safety precautions.
6464782-UUM-B-0524
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