Islandaire EZ Series 25 Installation and operation manual

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Islandaire Manual Model # EZ Series 25

Operating & Maintenance Manual for Islandaire Packaged
Terminal Thru-Wall Air Conditioners & Heat Pumps
*THIS BOOK CONTAINS INFORMATION ON THE OPERATION OF YOUR UNIT. KEEP IN A SAFE
PLACE FOR READY REFERENCE. SHOULD YOU REQUIRE ANY FURTHER INFORMATION, CONTACT YOUR DEALER OR

OUR TECHNICAL SUPPORT DEPARTMENT AT 1-800-886-2759.
THE INFORMATION IN THIS MANUALMUSTBE FOLLOWED. IMPROPER INSTALLATION,ADJUSTMENT,ALTERATION,SERVICE,
OR MAINTENANCE CAN VOID WARRANTY, CAUSE PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE. AQUALIFIED
INSTALLER OR SERVICEAGENCY MUST PERFORM INSTALLATION OR SERVICE. ALL LOCALAND NATIONALCODES MUSTBE
ADHERED TO WHEN INSTALLING THIS PRODUCT!
TO MAINTAIN WARRANTY COVERAGE THE CONDENSER COIL SURFACE MUST BE CLEANED REGULARLY, AND THE ROOM
AIR FILTER MUST BE CLEANED REGULARLY. USE OF EXTENSION CORDS IS NOT RECOMMENDED AND WILL VOID WAR-
RANTY COVERAGE. CAUTION: USE OF EXTENSION CORDS CAN CAUSE FIRE, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE. HAZARDOUS MOVING PARTS. DO NOT OPERATE WITH FRONT PANEL REMOVED. ELECTRIC SHOCK HAZARD
DISCONNECT POWER BEFORE SERVICING THE UNIT.

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Table of Contents
Page
Contents
Section
2
Receiving Units
1
3
Installation Checklist & Notes
2
7
Operating Instructions
3
17
Electronic Board Diagnosis/Test
4
22
Heat Pump Units
5
23
Start Up Checklist
6
24
Routine Maintenance
7
24
Operational Practices
8
26
Troubleshooting Guide
9

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RECEIVING UNITS
Upon receipt of equipment, check carton for visible damage. Make a notation on the shipper’s delivery
ticket of any damages before signing. If there is any evidence of rough handling, the cartons should
be opened at once to check for concealed damage. If any damage is found, notify the carrier within 48
hours to establish your claim, and request an inspection report from the carrier. The warranty claims
department should then be contacted.
Do not store or transport the unit on end. For proper storing, each carton is marked with “up” arrows.
Upon receipt of this equipment, if you notice that the units were not stacked properly during
transportation, make a notation on the shipper’s delivery ticket, and be sure the unit is in normal upright
position 24 hours before operating.
In the event that elevator transfer makes up-ended positioning unavoidable, absolutely insure that the
unit is in the normal upright position for at least 24 hours before operating. IGNORING THIS
INSTRUCTION MAYVOID THE WARRANTY.
The units must be handled with care at all times. Rough handling can damage internal electrical and
refrigeration components.

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INSTALLATION CHECKLIST
The following instructions cover the installation of replacement PTAC units where existing wall sleeves are
utilized. Instructions for the installation of a new wall sleeve are not covered in this manual. In-
stallation and maintenance should be performed by qualified personnel who are familiar with local
codes and regulations, and are experienced with this type of equipment.
• All electrical connections and circuits must be installed in compliance with and conform to the National
Electrical Code (USA), Canadian Electrical Code (Canada), and local codes that have jurisdiction.
• Inspect existing wall sleeve. (Refer to installation note 1; 4.)
• Ensure that supply air outlet is properly sealed to discharge of enclosure. (Refer to installation note 2;
4.)
• Electrical power is disconnected during installation or service.
• Condenser air inlet and outlet MUST be clear and free of obstructions. (Refer to installation note 3;
4.)
• Condenser seals and baffles, where applicable, must be installed. (Refer to installation notes 4 & 5;
4.)
• Ensure that drapes, bed, bedspread, furniture, etc. DO NOT block either return or discharge air open-
ings. (Refer to installation note 6; 5.)

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INSTALLATION NOTES
1- Inspect the existing wall sleeve to insure it is not damaged and that it is securely mounted in the wall. Use a level gauge
to insure the sleeve is pitched properly. Be sure that any gaskets originally mounted on the wall sleeve that are missing
or worn be replaced.
2- Any gaps between the discharge and the enclosure outlet will cause the unit to short cycle. This condition will shorten
compressor life. Small gaps should be sealed with foam rubber gaskets. Larger gaps may require a sheet metal collar
(consult installing contractor).
3- A Packaged Thru-Wall Air Conditioner must reject its heat to the outside air in the cooling mode. As a result, any ob-
struction that impedes this heat transfer will shorten compressor life. Warranty issues related to compressor failure as a
result of these conditions will not be covered under warranty.
4- Some Thru-Wall units may be shipped from the factory with foam rubber seals applied to the plate flanges of the
condenser coil. The purpose of these seals is to fill the gap between the condenser coil and the outdoor louver. The
unit must be slid completely into the wall sleeve to insure proper seating of these seals. It is important that these seals
remain intact during installation. Without these seals, compressor life may be shortened. Warranty issues re-
lated to compressor failure due to missing condenser coil seals will not be covered underwarranty.
5- Certain installations with extended sleeves will require the use of baffles. These sheet metal baffles are attached to the
condenser coil flange and have seals on their outer surface. These seals will seat against the outdoor grill when the
unit is slid into an extended wall sleeve. It is important that units installed in extended wall sleeves have these baffles
installed. Without these baffles, compressor life may be shortened. Warranty issues related to compressor failure due
to missing condenser coil baffles will not be covered under warranty.

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(Installation Notes, continued)
6- Ensure that there is adequate clearance for servicing and proper operation. Aminimum of 18 inches in front of the
chassis is required. Provide additional space for service technician to work on the unit.
7- Units must be installed in accordance with all applicable codes.
8- Toprevent damage, this unit should NOT be operated to provide supplementary heating & cooling during the
construction period. The unit is designed for operation in a normal indoor environment. Operating this unit in unen-
closed space and exposure to construction environment may result in permanentdamage.
9- Inspect the unit specification label in order to identify the model number. At this time voltage, capacity, and other
special features should be noted.
10- Be sure that the amperage of the dedicated electrical service to the unit is correct. Use of extension cord is NOT
recommended and will void warranty. (Refer to Table 1)
11- After the unit is installed in the sleeve, the shipping carton can be cut down and secured to the unit to protect it during
the construction phase.

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Electrical Circuit Ratings
Line
Voltage
Rated
Amperage
Receptacle
Configuration
Receptacle
Number
Maximum
Amperage
115
15
NEMA 5-15P
12
115
20
NEMA 5-20R
16
208/230
15
NEMA 6-15R
12
208/230
20
NEMA 6-20R
16
208/230
30
NEMA 6-30R
24
277
20
NEMA 7-20R
16
Note: Use HACR circuit breaker or time delay fuse.
Table 1

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OPERATING INSTRUCTIONS
This manual will describe the three types of control systems found on most Islandaire units:
1. Mechanical Push button Switch (5 button)
2. Base Electronic Controls (keypad switch)
3. Intellitemp Electronic Controls (keypad switch)
Note: For operation of systems other than those referenced above consult installing contractor.
1- Mechanical Pushbutton Switch Operation (5 button) (Refer to Fig. 1)
Overview: Mode selection is determined by pushbutton switch. In heating and cooling modes, desired
room temperature is maintained by the thermostat setting. Set thermostat to desirable comfort level.
Mechanical Pushbutton Switch Modes (5 button):
OFF–All modes are off. If you turn the unit off in cooling or heat pump mode, wait 2 minutes before
restarting.
HI COOL–Enables cooling mode. Compressor will cycle based on thermostat setting. Fan will be on
constant high speed.
LO COOL–Enables cooling mode. Compressor will cycle based on thermostat setting. Fan will be on
constant low speed.
HEAT–Enables heating mode. Heating and low fan speed will cycle based on thermostat setting.*
FAN–Enables high fan speed operation only.
* Note: On certain models, fan is constant in heating mode. Consult factory.

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2- Base Electronic Control Operation (Refer to Fig. 2)
Turning Unit ON for Heating and Cooling:
1- Press POWER button.
2- Press the MODE button, select the operation mode: heat/cool/fan.
3- Press WARM or COLD button, to set your desired temperature. The setting temperature range is
60 - 90 °F (16 - 32 °C).
4- Press the FAN SPEED button, to set your desired air flow rate: high/low/auto.
NOTE: When unit is shut off, current settings are saved in memory. When unit is turned back on, these settings are re-
stored.

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3. Intellitemp Electronic Control Operation (Refer to Fig. 3)
Turning Unit ON for Heating and Cooling:
1- Press ON/OFF key (room temperature will appear in display)
2- Adjust set point by pressing WARM (up arrow) or COLD (down arrow) key. (While adjusting, temperature set point will
appear in display.)
3- Mode operation (HEAT or COOL) will automatically be selected based on room temperature and set point
temperature.
4- Select fan mode by pressing FAN key. Select constant fan operation (1 of 4 speeds LOW to HIGH speed). Selecting
AUTO will turn fan off.
Turning Unit OFF:
1- Press ON/OFF key (temperature display disappears).
2- To turn fan off, press FAN key until fan is in AUTO.
Fan Only Operation:
1- Turn unit off by pressing ON/OFF key (temperature display disappears).
2- Select fan mode by pressing FAN key. Select constant fan operation (1 of 4 speeds LOW to HIGH speed). Selecting
AUTO will turn fan off.
Accessing Outside Air Temperature:
Hold OUTSIDE TEMP key. Outside air temperature will appear in display whenever this key is held down and unit is on.
Opening Outside Air Vent:
Pushing the VENT key while the unit is in the cooling mode will open the outside air vent.

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NOTE: When unit is shut off, current settings are saved in memory. When unit is turned back on, these settings
are restored.
Fig. 3

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Intellitemp Mode Selection (Refer to Fig. 4)
On the Intellitemp control, the mode of operation (cool, heat, or auto) may be selected by the user by pressing and holding
the VENT and ON/OFF keys simultaneously. The display will scroll through the modes described below. When the desired
mode is in the display, release the keys and that mode will be locked in. In AU (auto) the control will automatically cycle
between either heating or cooling to maintain set point temperature.
Fig. 4

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Fig. 5
For all units equipped with electronic controls - Low Temperature Protection (Refer to Fig. 5)
A standard feature of the Islandaire electronic control system is the ‘Low Temperature Protection’ option. If an indoor
temperature of 50 degrees Fahrenheit (or lower) is detected then the heat cycle will automatically activate (even if the unit
is in the OFF position). While the ‘Low Temperature Protection’ feature is activated, the letters ‘LO’ will be displayed.
The heat cycle will continue until the room temperature reaches 55 degrees Fahrenheit, at which time the unit will satisfy
and shut down. All control functions will be locked-out while ‘LO’ is displayed.
Note: Cutting power to the unit is the only way to interrupt unit function while the ‘Low Temperature Protection’ feature is activated.
If desired, this feature may be disabled by your qualified service provider.

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PROGRAMMABLE CAPABILITIES
1) Temperature shift key: Press + and - button at the same time for 3 seconds, the temperature is
shifted between Fahrenheit and Centigrade.
2) Temperature setting limiting: Press + and SPEED button at the same time to enter the maxi-
mum and minimum temperature setting. R1~R8 will be displayed every 3 seconds. Release the two keys
to ensure the setting is effective and the figures will last for 5 seconds. The temperature setting range is
between 60 °F ~ 90 °F as the factory default.
Chart 1. Temperature setting limiting
R1
R2
R3
R4
R5
R6
R7
R8
Heating Temperature Limits (°F)
86
86
90
74
92
90
72
90
Cooling Temperature Limits (°F)
63
65
72
72
67
69
68
60

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Remote Thermostat Change:
On standby off mode, press MODE and + button for 3 seconds, the buzzer will chime and LED display will read “ P ” or “ r ”.
P: Unit control has control of unit
r: Wall thermostat has control of unit
RED-24VAC
Purple-LS control
Green-High fan speed
Blue-Reversing valve
Yellow-Compressor
White-Heater
Orange-Low fan speed
Black-Common ground R LS GH B Y W GL C
WALL MOUNTED THERMOSTAT INTERFACE
R LS GH B Y W GL C

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ELECTRONIC BOARD DIAGNOSIS/TEST
Each unit has two ‘built-in’ tools to assist the technician in the troubleshooting of the entire system. The
first tool is the ‘Continuous System Diagnostics’, and the second tool is the ‘Automatic System
Component Test’.
1- Continuous System Diagnostics: (Base or Intellitemp)
The control incorporates continuous self-diagnostic checking of several system parameters and reports
the status by an LED blink code on the main board.
1- Unplug or disconnect the power to the unit.
2- Gain access into the electric box on the chassis and locate the main boardwithin.
3- Locate the LED labeled ‘DIAGNOSTIC STATUS’ on the main board, near the center of the board.
4- Reapply power to the unit, wait approximately 10 seconds, after which the unit will enter its normal
operating mode. At this time the diagnostic indicator LED will blink repeatedly. These ‘blink codes’
will repeat approximately every 5 seconds with a delay between bursts and are readable as follows:
a. 0 blinks = no power
b. 1 blink = normal
c. 2 blinks = IAT(indoor air temperature) probe failure (check connection –replace)
d. 3 blinks = OAT(outdoor air temperature) probe failure (check connection –replace)
e. 4 blinks = Between board communications failure
f. 5 blinks = Keypad failure (stuck key) or interconnect & ribbon cable failure
g. 6 blinks = Remote thermostat input failure (bad input combination) check thermostat wiring
h. 7 blinks = Inadequate ground
i. 8 blinks = Outdoor coil low temperature switch open (only if Heat Pump configured by DIPswitch)
–Disables compressor operation