Recognize safety information. This is the safety-alert symbol .When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and CAUTION. These
words are used with the safety-alert symbol.
DANGER identies the most serious hazards which will result in severe personal injury or death.
WARNING signies hazards which could result in personal injury or death.
CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
WARNING
!
!
PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal injury, death and/or property damage. For your safety, the
information in this manual must be followed to minimize the risk of re or explosion, electric shock, or to prevent
property damage, personal injury, or loss of life.
• This unit must be properly installed in accordance with the Installation Instructions before it is used.
• Immediately repair or replace all electric service cords that have become frayed or otherwise damaged.
• Unplug or disconnect the unit at the fuse box or circuit breaker before making any repairs.
NOTE: We strongly recommend that any servicing be performed by a qualied individual.
GENERAL INFORMATION
Heat Controller package terminal air conditioners and heat pumps provide a high standard of quality in performance, workmanship, durability and appearance as they heat and cool the occupied air space year round.
This manual provides information for ease of installation, operation and maintenance. All models are designed for through-thewall installation. Separate installation instructions are included with all accessory components.
BEFORE YOU BEGIN
Read these instructions completely and carefully.
IMPORTANT: Save these instructions for local inspector’s use.
IMPORTANT: Observe all governing codes and ordinances.
NOTE TO INSTALLER
Be sure to leave these instructions with the owner.
NOTE TO OWNER
Keep these instructions for future reference. Be sure to write down the model and serial number of unit on space provided
on back page. The model and serial number can be located on the serial number plate attached to unit. These numbers are
required for service. See Fig. 1.
This unit has many exciting features which are different than those found on
standard PTAC models. The owner must be familiar with these features in order to
fully understand the operation and capability of the unit.
• SELF DIAGNOSITICS—The unit has an onboard computer that utilizes real-
time diagnostics to prolong the life of your unit. There is an LED indicator on
the control board located behind the front panel, that will ash an error code
if the unit has detected some kind of fault condition. In many cases, the unit
will automatically clear the fault condition and continue operating with no
interruption. In some cases, the condition cannot be cleared and the unit will
require service. In those cases, an “Fx” failure mode will be displayed on the
digital display. For a detailed list of all error codes and “Fx” conditions, see
Table 6—Status LED Indicator Denitions for further details.
• AUTO RESTART—If power is lost, all of the control settings (setpoint, mode,
fan speed, on/off and conguration) are stored. So when power is restored, the unit will start back up in the mode (and conguration) it was in when power was lost.
• QUIET OPERATION—The unit has 2 fan motors and a tangential blower wheel to reduce noise. The indoor fan will always run
a minimum of 10 seconds before the compressor, to help reduce any compressor starting noise.
• RANDOM COMPRESSOR RESTART—To help prevent power surges after a power outage (from many of your PTAC/HPs starting
at the same time), the compressor is equipped with a 2:45 to 3:15 minute random restart delay feature.Whenever the unit is
plugged in, or power has been restarted, a random compressor restart will occur between the random restart time frame.
• COMPRESSOR PROTECTION—To prevent short cycling of the compressor and maximize it’s life, there is a random start--up
delay of 3 minutes on the compressor and a minimum compressor run time of 3 minutes.
•AUTOMATIC ROOM FREEZE PROTECTION—The unit will automatically will keep the temperature in the room from getting
too cold, where water pipes might freeze. If the unit is congured for the freeze protection feature to be active (which is the
default condition), and while power is supplied to the unit, if the unit senses temperature below 40°F, the fan motor and
electric heater are turned on and will warm the room to 50°F. If Freeze protection is not required, change the conguration
switch to turn the feature off (see section on unit conguration).
• AUTOMATIC DEFROST PROTECTION (FOR HEAT PUMP MODELS ONLY)—When the outdoor temperature gets too cold (ap-
prox. 35°F) and the unit can no longer effectively heat with the compressor, the unit will automatically switch to electric heating. The unit will then heat with electric heat until the outside temperature rises enough (approx. 40°F), so the compressor
can be used to effectively heat again.
• AUTOMATIC QUICK WARM-UP (FOR HEAT PUMP MODELS ONLY)—If the room temperature falls to 5°F below the set point
temperature, the reverse cycle heat is shut off and the electric strip heat is turned on for one cycle, until heating is satised.
•LED INDICATOR’S AND BUTTONS—The touch pad has buttons for MODE, FAN SPEED, ON/OFF, SETPOINT UP and SETPOINT
DOWN. It also has LEDs that correspond to the mode, fan speed and setpoint operation, to indicate the unit’s status. The
LEDs below the mode button, FAN, COOL, and HEAT, indicate which operating mode is active. The LEDs below the Fan button,
Low, Med and Hi, indicate the fan speed that is selected. The LED located in the lower right corner is the unit On/Off status
LED. If the unit is in ON mode, the LED will be green. If the unit is OFF, the LED will be red.
• CONFIGURE FAN TO OPTIMIZE SELECTED APPLICATION—This unit can be optimized to specic applications by conguring
the fan to run in a continuous mode or to cycle on and off with the compressor and electric heater (can be different for both
heating and cooling modes). In cycle mode, fan will continue to run after compressor or electric heater stops in order blow off
any residual heat or cool left on coil. In continues mode, the fan remains on at all times even when the compressor is off.
Table 6—STATUS LED Indicator Denitions
1 Indoor air temp sensor open/short 7Segment display ‘F1’, with STATUS light ash 1 time,off 2 seconds
2 Indoor coil sensor open/short 7Segment display ‘F2’, with STATUS light ash 2 times and off 2 seconds
3 Outdoor coil sensor open/short 7Segment display ‘F4’, with STATUS light ash 4 times and off 2 seconds
4 Freeze Guard protection 7Segment display ‘FP’
5 Thermostat wiring errorSTATUS light ash 9 times and off 3 sec, repeat
6 Indoor coil high temp protectionSTATUS light ash 8 times and off 3 sec, repeat
7 Defrost (heat pump type)STATUS light ash 7 times and off 3 sec, repeat
8 Outdoor coil high temp protectionSTATUS light ash 6 times and off 3 sec, repeat
9 Indoor coil freeze protectionSTATUS light ash 5 times and off 3 sec, repeat
NOTE: When status light is ashing, it will be ON for 0.5 seconds and OFF for another 0.5 seconds.
• Unit Conguration —There are many different conguration possibilities, through both dipswitches and the digital keypad,
that allow you to congure the unit for your exact application. See section on unit conguration for more details. Following
are the conguration selections that have not previously been mentioned:
• °F or °C—The unit can display in either °F or °C
• Indoor Temperature Sensor Biasing —Optimize the room temperature sensor reading to your exact
application (one for cooling and another for heating).
• Emergency Heat (forHeat Pump Only)—Disable the compressor during heating mode operation (heat
only with Electric Heat).
• Display Setpoint OR Room Temperature—The unit can be congured to display the room temperature
OR setpoint only, during heating and cooling modes. See section on unit conguration for more details.
• Limit the Setpoint Range—The unit can be congured to limit the controlling setpoint range.The display
will always show the complete setpoint range, but the controlling setpoint will be limited to the congured
minimum and maximum setpoint selected. See section on unit conguration for more details.
• Energy Management—Sometimes known as Front Desk Control, an input is provided so that the unit can
be manually disabled from a different location. If the unit detects 24 vac on this input, it will automatically
turn itself off. If no voltage is detected on the input, the unit will run normally.
• Wall Thermostat Control—A wired wall thermostat can be connected to the unit. If it is, the unit must be
congured to disable the keypad. See section on wired inputs and unit conguration for more details.
UNIT NOMENCLATURE
EKTC—Cooling only with Electric Heat
EKTH—Heat Pump with Electric Heat
EKTC 07 - 1 G
BTU/H
07K
09K
12K
15K
Fig. 3 – Unit Nomenclature
VOLTAGE CODE
1=208/230V-60Hz
2=265V-60Hz (consult factory)
Failure to follow this warning could result in personal injury or death and/or property damage. DO NOT alter cord or plug or use an extension cord.
POWER CONNECTION OPTIONS
Appropriate power cord accessory kit is determined by the voltage, and amperage of the branch circuit. The unit does not come
with a power cord (or hard wire kit). An accessory power cord kit must be ordered to connect the unit to the outlet. If the unit is
to be hard wired, an accessory hard wire kit must be ordered.
IMPORTANT: For 265V units, if a power cord is selected, it must plug into the 265V subbase accessory.
Be sure that your outlet matches the appropriate blade conguration of the plug and that it is within reach of the service cord.All
wiring, including installation of the receptacle, must be in accordance with the NEC and local codes, ordinances and regulations.
National codes require the use of an arc fault or leakage current detection device on all 208/230V power cords. Be sure to select
the correct cord for your installation.
ALL UNITS
Wire Size
Use recommended wire size given in Table 1 and install a single branch circuit.All wiring must comply with local and national
codes. All units are designed to operate off ONE single branch circuit only.
NOTE: Use copper conductors only.
Table 1—SUGGESTED BRANCH CIRCUITWIRE SIZES*
NAMEPLATE AMPS
7.0 to 1214
12.1 to 1612
16.1 to 2410
AWG WIRE SIZE
LEGEND
AWG --- American Wire Gauge
* Single circuit from main box.
Based on copper wire at 60°C temperature rating.
Grounding
For safety and protection, the unit is grounded through the service cord plug or through separate ground wire provided on
hard wired units. Be sure that the branch circuit or general purpose outlet is grounded.
VOLTAGE SUPPLY
Check voltage supply at outlet. For satisfactory results, the voltage range must always be within the ranges found on the
data information plate.
Cord-connected Units
The 250V eld supplied outlet must match the plug for the standard 208/230V units and be within reach of the service
cord. The standard cord-connected 265V units require an accessory electrical subbase for operation. Refer to Table 2 for
proper receptacle and fuse type.
Power Cord Protection
The power cord for 230/208v units provide power cord re protection.Unit power automatically disconnects when unsafe conditions are detected. Power to the unit can be restored by pressing the reset button on plug head. Upon completion of unit instal-
lation for 230/208V models, an operational check should be performed using the TEST/RESET buttons on the plug head.
NOTE: The 265V models do not incorporate this feature as they require use of the electrical subbase accessory.
Table 2—RECEPTACLES AND FUSE TYPES: 250, 265 VOLTS
LEGEND
HACR—Heating, Air Conditioning, Refrigeration * May be used for 15 amp applications
Proper installation is the responsibility of the installer.
Product failure due to improper installation is not covered under the Warranty. See the warranty card enclosed with your
unit for more details.
CHASSIS INSTALLATION
Units are shipped without a sleeve. In applications where unit is a replacement, it is recommended that a Heat Controller sleeve
be used.
These units can retrot General Electric, Amana, Carrier, Trane, Friedrich and many other eld installed sleeves/grilles (be sure
outdoor grille is installed on the sleeve). See Table 3 for details.
For any sleeve retrot applications, be sure that the foam seals (factory--installed on the tube sheets) provide a good seal between the grille and outdoor coil tube sheets. These foam seals provide a barrier to separate outdoor coil leaving air from mixing
with the outdoor incoming air (known as air recirculation).
Table 3—Retrot Wall Sleeves
CAUTION
!
UNIT DAMAGE AND/OR OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
For retrot applications, foam seals on outdoor coil tube
sheets must make a seal between the coil and the grille or
loss of performance and premature damage to the major
components can result.
ManufacturerWall Sleeve Part Number
General Electric
Carrier
Amana
Trane
Friedrich
* FR-SLEEVE-EXT accessory is required for retrot into Friedrich (T -Series)
IMPORTANT: Please read following electrical safety data carefully.
WARNING
!
ELECTRICAL SHOCK AND/OR UNIT OPERATION AND DAMAGE HAZARD
Failure to follow this warning could result in personal injury or death and/or unit operation and damage.
• Follow the National Electrical Code (NEC) or local codes and ordinances.
• For personal safety, this unit MUST BE properly grounded.
• Protective devices (fuses or circuit breakers) acceptable for unit installations are specied on the nameplate of each unit.
• Do not use an extension cord with this unit.
• Aluminum building wiring may present special problems -- consult a qualied electrician.
• When unit is in STOP position, there is still voltage to electrical controls.
• Disconnect power to unit before servicing by:
1. Removing power cord (if it has one) from wall receptacle.
2. Removing branch circuit fuses or turning circuit breakers off at panel.
1. Remove front panel. See Fig. 7.
2. Remove junction box.
• Remove junction box cover by removing three screws from front. Remove junction box by taking out top, rear and side
screws. See Fig. 10.
3. Connect accessory power supply cord or hard wire connector to unit connector. See Fig. 11.
• Units must be installed using the appropriate power supply kit. See Table 4—POWER CONNECTION CHART. These
connections must be followed.
4. Reinstall junction box and cover.
S Use wire clamp to attach power cord to basepan. Secure with screws (included) See Fig. 12.
S Relace junction box and cover with screws removed from Step 2. Tighten securely.
5. Replace front panel. See Fig. 9.
6. Connect power to unit.
Fig. 10—Junction Box Location
Fig. 12—Wire Clamp
Fig. 11—Power Connection
Table 4—Power Connection Chart
CODE OF POWER SUPPLY KIT
UNIT MODEL
EKTC07-1G
EKTH07-1G
EKTC09-1G
EKTH09-1G
EKTC12-1G
EKTH12-1G
EKTC15-1G
EKTH15-1G
EKTC07-2G
EKTH07-2G
EKTC09-2G
EKTH09-2G
EKTC12-2G
EKTH12-2G
EKTC15-2G
EKTH15-2G
* Using 30A on these units could result in damage to your unit.
Auxiliary dip switch controls are located behind front panel,
through an opening below the control panel. To access, remove front panel. See Fig. 7.
Dip switches are accessible without opening the control box.
Unit must be powered OFF to effectively change their status.
Factory settings for dip switches will be in the DOWN position.
See Table 5—Dip Switch Functions for functions of each dip
switch position.
Fig. 15—Dip Switches
Fig. 16—Dipswitch Location on Unit
Table 5—DIP SWITCH FUNCTIONS
d
d
d
d
Electric Heating Only / Emergency Heat (For Heat Pump Units Only)
This setting is typically used for EmergencyHeating.
Wall Thermostat Enable
A wired wall thermostat can be connected to the unit. If it is, this dipswitch must be moved to the Wall Thermostat Enable
Position, before the wall thermostat will begin control.
Heat and Cool Fan CON/CYC Dip--switches
Allows the fan to operate in continuous or cycle modes while the unit is in heating or cooling mode (continuous or cycle):
CON (Continuous)
Allows fan to run continuously, circulating air even when the temperature setting has been satised. This switch helps to
maintain the room temperature closer to the thermostat setting.
CYC (Cycle)
This setting allows the fan to cycle on and off with the compressor or electric heater. The fan stops a short time after the temperature
setting is satised.
Setpoint Temperature Limits
Provides a restricted range of temperature control.
Room Freeze Protection
If unit senses a room temperature below 40°F, the fan motor and electric strip heat will turn on and warm the room to 50°F. The
fan stops a short time after the temperature is satised.
Allows further conguration of system to desired application such as whether th unit displays in °F or °C, whether the display
shows the set point or room air temperature, and to set controls for sensor biasing. Changes do not take affect until power is
cycled on the unit.
To enter Keypad conguration
Cycle power to unit. Press and hold the Fan Speed Button and the COOLER button for 5 continuous seconds, within 30
seconds of the unit being powered up. If the unit has had power for more than 30 continuous seconds, keypad conguration
cannot be entered. When keypad conguration mode is rst entered, it will default to Fahrenheit/ Celsius Display Mode.
To scroll through the Keypad Conguration Options
Press and release the Fan Speed button. The stored value will be displayed.
To modify conguration settings
Press and release the Setpoint Up or Setpoint Down buttons.
To exit Keypad Conguration
Keypad Congurationwill end on its own 30 seconds after the last button press or when the MODE button on the Keypad is
pressed.
Fahrenheit/ Celsius Display Switch:
Change between degrees Fahrenheit and Celsius on the display. An “F” indicates Fahrenheit display and ‘C’ indicates
Celsius. Default is degrees “F”.
Indoor Air Temperature Sensor Biasing for Cooling mode:
Sometimes known as an anticipator, the air temperature sensor bias is used to adjust the room air temperature
reading when in cooling mode. (Not normally required.)
Indoor Air Temperature Sensor Biasing forHeating mode:
Sometimes known as an anticipator, the air temperature sensor bias is used to adjust the room air
temperature reading when in heating mode. (Not normally required.)
Indoor Temperature Display:
Change between showing setpoint only on the display during heating and coolingmodes “SP” or displaying
room temperature during heating and cooling modes “AA”. “SP” mode is the default mode.
• If “SP” is selected, only the setpoint will be displayed during heating and cooling modes, regardless of what the
real temperature is in the room.
• If “AA” mode is selected, the room temperature will be displayed during heating, cooling and fan only modes.
— If the mode button has been changed to either heating or coolingmodes, setpoint will be displayed for 10 seconds. After the
10 seconds, the room temperature will again be displayed.
— If the on/off button is depressed (when the unit is off) and the last mode was either cooling or heating mode, the setpoint
will be displayed for 10 seconds before displaying room temperature.
— During heating and cooling modes, if either the up or down setpoint key is depressed, the display will show the setpoint until
10 seconds after the last up or down key press. Then the room temperature will be displayed again.
Turn unit off and disconnect power supply.
To clean, use water and a mild detergent. DO NOT use bleach or abrasives. Some commercial cleaners may damage the plastic parts.
OUTDOOR COIL
Coil on outdoor side of unit should be checked regularly. Unit will need to be removed to inspect dirt build-up that will occur on
the inside of the coil. If clogged with dirt or soot, coil should be professionally cleaned.
NOTE: Never use a high-pressure spray on coil.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Airow restriction may cause damage to the unit.
Fig. 18—Outdoor Coil
BASE PAN
In some installations, dirt or other debris may be blown into unit from outside and settle in base pan (bottom of unit). Check
base pan periodically and clean, if necessary.
AIR FILTERS
IMPORTANT: TURN UNIT OFF BEFORE CLEANING
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Do not operate unit without lters in place. If a lter becomes torn or damaged, it should be replaced immediately.
Operating without lters in place or with damaged lters will allow dirt and dust to reach indoor coil and reduce
cooling, heating, airow and efciency of unit. Airow restriction may cause damage to unit.
Themost important thing you can do to maintain unit efciency is to clean the lters at least every 30 days (or sooner depending
on application). Clogged lters reduce cooling, heating and airow.
Preventative maintenance is essential to proper unit operation, efciency and longevity.
To ensure equipment operates properly, it must be properlymaintained. Equipment operation should be checked and veried
several times during each year. During regular unit inspection and maintenance, follow the guidelines below:
• Clean both sides of outdoor coil. (Never use high pressure spray on coils.)
• Clean basepan and outdoor vent lter.
• Clean outdoor orice and fan.
• Clean indoor coil. (Never use high pressure spray on coils.)
• Clean indoor fan, wire screen and front panel.
• Clean or install new indoor-air inlet lter(s).
• Clean wall sleeve and outdoor grille.
• Inspect cord and receptacle.
• Secure electrical connections.
• Ensure front panel is properly mounted and not damaged.
• Check that plug is plugged securely in wall receptacle.
Note :Plug has a test/reset button on it. Make sure that the plug
has not tripped.
• Replacethefuse.SeeNote1.
• Reset circuit breaker. See Note 1.
• Turn unit on (bottom right button on keypad).
Note: If the unit turns on, the LED will be green. If the unit is off,
the LED will be red. If there is no LED on, there is a problem
with power or damage to the control.
Check dipswitch settings
S Unit air discharge section is blocked
S Temperature setting is not high or low enough
Note: Setpoint limits may not allow the unit to heat
or cool the room to the temperature desired.
Check section on dipswitch settings.
S Unit air filters are dirty.
S Room is excessively hot or cold when unit is started.
S Vent door left op en
S Unit may be in a protection or diagnostic failure
Unit may be in protection or diagnostic failure mode.
Check section on self diagnostics.
Compressor is in time delay mode. There is a protective
S Compressorisintimedelay.Thereisaprotective
time delay (approx. 3 minutes) on starting the
compressor after a power outage (or restarting
after it has been turned off), to prevent tripping of
the compressor overload.
DISPLAY HAS STRANGE
NUMBERS/CHARACTERS ON IT
UNIT MAKING NOISES• Clicking, gurgling and whooshing noises are normal during
WATER DRIPPING OUTSIDE• If a drain kit has not been installed, condensation runoff during
WATER DRIPPING INSIDE
• Wall sleeve is not installed level• Wall sleeve must be installed level for proper drainage of
ICE OR FROST FORMS ON INDOOR COIL
• Low outdoor temperature
• Dirty filters
S Make sure that curtains, blinds or furniture are not restricting or
blocking unit airflow.
S Reset to a lower or higher temperature setting.
S Remove and clean filters.
S Allow sufficient amount of time for unit to heat or cool the room.
Start h eating or cooling early before outdoor temperature, cooking
heat or gatherings of people make room uncomfortable.
S Close vent door.
S Check dipswitch settings for desired comfort.
Wait approximately 3 minutes for compressor to start
The unit may be in a diagnostic condition. Check self diagnostic
• The unit may be in a diagnostic condition. Check Intelligent Self---
section to determine if the unit has had a failure.
• The unit may be set for _C (instead of _F), see the keypad
configuration section
operation of unit.
very hot and humid weather is normal. See Note 2. If a drain kit has
been installed and is connected to a drain system, check gaskets
and fittings around drain for leaks and plugs.
condensation. Check that installation is level and make any
necessary adjustments.
• When outdoor temperature is approximately 55_F or below, frost
may form on the indoor coil when unit is in Cooling mode. Switch
unit to FAN operation until ice or frost melts.
• Remove and clean filters.
COMPRESSOR PROTECTION
• Power may have cycled, so compressor is in a
restart protection.
NOTES:
1. If circuit breaker is tripped or fuse is blown more than once, contact a qualified electrician.
2. If unit is installed where condensation drainage could drip in an undesirable location, an accessory drain kit should be installed and connected to drain
system.
• Random Compressor restart --- Whenever the unit is plugged in,
or power has been restarted, a random compressor restart will
occur. After a power outage, the compressor will restart after
approximately 3 minutes.
• Compressor Protection --- To prevent short cycling of the
compressor, there is a random startup delay of 3 minutes and a
minimum compressor run time of 3 minutes.
16
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9/2013
Design, specications, performance data and materials subject to change without notice.