York Latitude NM, NM, NM Latitude R410A Owner's Manual
USER’S INFORMATION
MANUAL
SINGLE PACKAGE AIR CONDITIONER
ELECTRIC/ELECTRIC
ISO 9001
Certified Quality
Management System
TABLE OF CONTENTS
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
THERMOSTATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
YOUR KEY TO COMFORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
COOLING ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
COOLING AND HEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
MANUAL CHANGE-OVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
PROGRAMMABLE ELECTRONIC THERMOSTATS . . . . . . . . . . . . .2
FAN OPERATION SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
POWER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Congratulations . . .
On your purchase of one of the most versatile comfort conditioning
systems available in the industry today. This high efficiency system
has been precision designed, manufactured of high quality materials
and has passed many vigorous inspections and tests to ensur e years of
satisfactory service.
This booklet is meant to increase your understanding of your system,
tell you how to operate it efficiently and how to obtain the greatest
measure of comfort at the lowest operating expense. Please read this
booklet thoroughly.
We appreciate your interest in our product and your decision to purchase our system. Enjoy your comfort.
The manufacturer recommends that the user read all sections of this manual and keep the manual for future reference.
SECTION I: SAFETY
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.
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MANUAL CHANGE-OVER THERMOSTAT . . . . . . . . . . . . . . . . . . 2
ELECTRONIC THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CARE OF SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
COIL CARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SERVICE CALLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FILTER CARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PARTS INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SOME EFFICIENCY DO’S & DON’TS . . . . . . . . . . . . . . . . . . . . . . . . 3
SECTION II: THERMOSTATS
YOUR KEY TO COMFORT
Though thermostats may vary widely in appearance they are all
designed to perform the same basic function, to control the operation of
your air conditioning system. Regardless of size or shape, each thermostat will feature a temperature indicator; a dial, arm, or push button for
selection of the desired temperature; a fan switch to choose the indoor
fan operation; and a comfort switch for you to select the system mode
of operation.
COOLING ONLY
If your air conditioning system is designed to provide cooling only (AC),
with no capability for heating operation (electric heat), a single-stage
cooling only thermostat, with a manual, one-position “Cool” and “Off”
comfort switch is all that is required for system operation.
NOTE: If you have an independent heating system (with a separate
thermostat), always be sure the heating control is turned “Off”
before turning on the cooling system.
COOLING AND HEATING
If your system has been designed to allow both cooling and heating
operation, you may have either a manual change-over type, or a programmable electronic type thermostat.
MANUAL CHANGE-OVER
Manual change-over simply means that the comfort switch must be
manually positioned every time you wish to switch from the cooling to
heating or heating to cooling modes of operation.
131001-YUM-C-0712
131001-YUM-C-0712
SECTION III: PROGRAMMABLE ELECTRONIC THERMOSTATS
The computerized electronic thermostat is actually a sophisticated electronic version of a manual change-over type. This thermostat includes
features which allow “set-back” temperature variations for periods of
sleep, or while you are away during the day, and means energy savings
for you. The thermostat also features a digital clock.
FIGURE 1: PROGRAMMABLE ELECTRONIC THERMOSTAT
FIGURE 2: PROGRAMMABLE ELECTRONIC THERMOSTAT
FAN OPERATION SELECTION
A multi-position fan switch allows you to choose the type of fan operation of the indoor fan.
AUTO
With the thermostat fan switch set to “AUTO”, the fan will run intermittently as required for either heating or cooling. This position will provide
the lowest operating cost. If you purchased one of our thermostats, they
have an Intelligent fan mode which continually circulates the air during
occupied modes or when you are at home, and can cycle the fan during
unoccupied mode or during the night while you sleep to further conserve energy.
ON
CONTINUOUS FAN OPERATION: With the thermostat fan switch set to
“ON”, the indoor fan will not shut off. However, the cooling (AC) or heating (electric heat) systems will still operate as required by room temperatures. This provides continuous air filtering and more even
temperature distribution to all conditioned spaces.
FAN ONLY OPERATION: On moderate days, usually during spring and
fall, when neither heating nor cooling is required, you may want to run
only the fan to ventilate, circulate and filter the air in your home or building. Set the comfort control switch to “OFF” and the fan switch to “ON”.
Be sure to return the switches to their original positions for normal operation.
SECTION IV: START-UP
The comfort control switch is assumed to be in the “OFF” position. If the
main power supply to the unit is off, turn the appropriate disconnects to
the “ON” position. Place the system into operation as follows:
1. Set temperature adjustment to the desired temperature on your thermostat.
COOLING - The higher the setting, the lower the amount of energy consumed. Federal Guidelines recommend a setting of 78°F.
HEATING - The lower the setting, the lower the amount of energy consumed. Federal guidelines recommend a setting of 65°F or lower.
NOTE: If your cooling and heating temperature adjustments are sepa-
rate, be sure to set both.
2. After considering “Fan Operation Selection” above, select and set the fan operation mode you desire.
3. Move the comfort control switch to the desired mode of operation (Cooling or Heating) found on your particular thermostat.
POWER FAILURE
When accidents, wind storms, etc. disrupt electrical power supply to
your house, switch thermostat to “OFF” position.
SECTION V: SYSTEM OPERATION
MANUAL CHANGE-OVER THERMOSTAT
COOLING YOUR HOME: With the comfort control switch in the
“COOL” position, the system will operate as follows: When the indoor
temperature rises above the level indicated by the temperature adjustment setting, the system will start. The unit will operate and the fan will
circulate the cooled, filtered air. When the room temperature is lowered
to the setting selected, the system will shut off.
HEATING YOUR HOME: If your system includes a electric heat section
and the comfort control switch is in the “HEAT” position, the system will
operate as follows: When the indoor temperature drops below the level
indicated by the temperature adjustment setting, the system will start.
The heating system will operate and the fan will circulate the filtered air.
When the room temperature rises to the setting selected, the system
will shut off. Whether heating or cooling, the fan will continue to operate
if the fan switch was set in the “ON or Intelligent” position. The “AUTO”
setting on the fan switch will allow the fan to shut off when your system
does.
ELECTRONIC THERMOSTAT
The computerized electronic thermostat, when programmed, will function automatically to operate the system as follows: When the indoor
temperature rises above the higher (COOL) setting, the unit will operate
and the fan will circulate the cooled, filtered air. When the room temperature is lowered to the selected level, the system will shut off. The
indoor fan will either shut off or run continuously, depending upon your
choice of fan switch setting. When the indoor temperature drops below
the lower (HEAT) setting, the heating system will operate, and the fan
will circulate the heated, filtered air. When the indoor temperature rises
to the selected setting, the system will shut off. The indoor fan will either
shut off or run continuously, depending upon your choice of fan switch
setting.
SECTION VI: CARE OF SYSTEM
It is strongly recommended that regular periodic preventative maintenance be performed on this equipment. The person most familiar with
the equipment in your H.V.A.C. system is a dealer. The dealer can
ensure your maintenance program meets the conditions of the Warranty”, maximize the efficiency of the equipment, and service your unit
within the federally mandated guidelines with regard to unlawful discharge of refrigerants into the atmosphere.
COIL CARE
Keep the outdoor unit free of foliage, grass clippings, leaves, paper, and
any other material which could restrict the proper air flow in and out of
the unit. The coil may be vacuumed to remove any debris from between
the fins. If the coil becomes excessively dirty, turn the main disconnect
switch to “Off” and wash the coil with your garden hose. Avoid getting
water into the fan motor and control box. Flush dirt from base pan after
cleaning the coil.
2 Unitary Products Group
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