6345396-UUM-A-0123

User's Information Manual: HMH7 Series - 17 SEER2

Horizontal Discharge Modulating Heat Pump

General

The units are tested in accordance with the following:

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

Safety

Read all sections of this manual and keep the manual

for future reference.

WARNING: Cancer and Reproductive Harm –

www.P65Warnings.ca.gov.

WARNING

This product must be installed and serviced by

a qualified installer or service agency. Improper

installation, adjustment, alteration, service, or

maintenance can cause injury or property damage.

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 (heat pumps)

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.

Setting the thermostat

CAUTION

The main power to the system must be kept on

at all times to prevent damage to the outdoor unit

compressor. If necessary, use the thermostat control

switch to turn the system off. Should the main power

be disconnected or interrupted for 8 h or longer, do not

attempt to start the system for 8 h after the power has

been restored to the outdoor unit. If heat is needed

during this 8 h period, use emergency heat.

Thermostat

Your key to comfort

Although thermostats may vary widely in appearance,

they are all designed to perform the same basic function:

to control the operation of your air conditioning or

heat pump system. Regardless of size or shape, each

thermostat features the following:

• a temperature indicator

• a dial, arm, or push button for selection of the required

temperature

• a fan switch to choose the indoor fan operation

• a comfort switch for selection of the system mode of

operation

Note: Only approved thermostats have been tested

and are fully compatible with this equipment. Many

different thermostats operate on batteries or power

stealing principals. These types of thermostats

cannot be supported as trouble-free when used with

this product.

If your system is designed to allow both cooling and

heating operation, you may have either a manual

changeover type of thermostat or a programmable

electronic type of thermostat.

Manual changeover means that the comfort switch must

be manually positioned every time you want to switch

from the cooling to heating mode of operation or heating

to cooling mode of operation.

A complete operating instruction is provided by the

manufacturer for each thermostat.

Johnson Controls Ducted Systems

Johnson Controls HMH7 Series - Page 27

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