Iec E055-71520317 Programmable Fan Coil Thermostat Owners Manual

IEC E055-71520317 Programmable Fan Coil Thermostat

FAN COIL PROGRAMMABLE DIGITAL THERMOSTAT

• 2- or 4-pipe configurable
• Dual or Single Setpoint
• 7 Day Programmable
• 3 Occupied, 1 Unoccupied
• Easy to program
• Large, easy-to-read display
• Soft-Glow Backlight
• Auto-Changeover
• Locking Keypad
• Override capable
• Auto-Changeover is available in 4-pipe systems, in 2-pipe systems with Electric Heat, or when used with G100-71520306 accessory, auto change-over sensor.

CAUTION
SELECTING THE HEAT OR COOL MODE 7
Follow Installation Instructions carefully. Disconnect the Power to the Heater/Air Conditioner before removing the old thermostat and installing the new thermostat.

Front Panel

1. Liquid Crystal Display
2. Up/Down Buttons
3. Mode Button
4. Fan/Override Button
5. Heat or Cool Indicator
   • Heat = Red,
   • Cool = Green

Display

1. Mode Indicators – Page 7-10
   Selects the operational mode of the equipment.
   • HEAT – Indicates the heating mode.
   • COOL – Indicates the cooling mode.
   • AUTO – Indicates the system will automatically changeover between heat and cool modes as the temperature varies.
   • PROGRAM ON – Indicates the time period program is enabled to run.
   • OFF – Indicates heating and cooling are turned off.
2. Clock with Day of the Week – Page 6
   • Indicates the current time and day. This clock is also used to program the time period schedules.
3. Room Temperature Display
   • Indicates current room temperature.
4. Desired Set Temperature – Page 11
   • Indicates desired room temperature(s).
5. Override icon – Pages 12 & 21
   • Indicates the program is currently being overridden for up to six hours.
6. Occupied & Unoccupied icons – Pages 13-16
   • Indicates the program number: Occupied 1,2,3 or Unoccupied.
7. Setup icon – Pages 18-22
   • Indicates the thermostat is in the advanced setup mode.
8. Fan icon – Page 11
   Indicates fan operation.
   • Fan = low speed
   • Fan = medium speed
   • Fan = high speed
     When only the Fan icon is displayed, the fan is in Auto mode and will run only when necessary to heat or cool.
9. Start & Stop icons – Pages 14-16
   • Appear when programming occupied time periods.
10. Locked icon – Page 30
    • Indicates the keypad has been locked.
11. Outside icon – Pages 21 & 31
    • Indicates the temperature displayed is from the optional outside sensor.

Quick Start Set the Clock and Go

The thermostat is preprogrammed from the factory to operate a 4 pipe system without the need for further programming. To optimize the installation of this thermostat for a 2 pipe system, follow the instructions in the Advanced Setup section,

Selecting the Heat or Cool Mode

Select Mode by Pressing the MODE Button

Selecting the Heat or Cool Mode 2-Pipe Operation

Heat Only
See Step #6 on page 19. In the Advanced Setup Section, select option 1: Heat only system.

Selecting the Heat or Cool Mode 2-Pipe Operation

Cool Only
See Step #6 on page 19. In the Advanced Setup Section, select option 2: Cool only system.

Selecting the Heat or Cool Mode 2-Pipe Operation

Heating and/or Cooling
Step #6 = 3 in Advanced Setup (page 19), and the accessory changeover sensor (G100-71520306) is used.
Step #6 = 4 or 5 in Advanced Setup (page 19). Operation is the same as a 4-pipe system (page 7).

Basic Operation

Selecting Your Desired Temperature (adjusting the setpoints)

AUTO OR PROGRAM MODE

Pressing the UP or DOWN button in Auto or Program mode will adjust both the heat and cool set temperatures simultaneously.

Overriding the Daily Schedule
Pressing and holding the FAN button for 5 seconds may be used to interrupt the normal time schedule programming of the thermostat. The override feature may only be used when the thermostat is running the time schedule, in Program On mode.

• Unoccupied Operation – During programmed, unoccupied periods pressing and holding the FAN button for 5 seconds will temporarily force the thermostat into Occupied 1 comfort settings for one to six hours (step #13, page 21). The Override icon will be illuminated during this time. If you press and hold the FAN button while the thermostat is currently overriding the daily schedule, this will reset the timer, returning the thermostat to the correct time period program for the day.
• Occupied Operation – Pressing and holding the FAN button for 5 seconds during a programmed Occupied time period will have no effect.

Programming Occupied & Unoccupied Periods

Press the MODE button. While holding MODE, press the UP button for two seconds to enter time period programming.

The copy command becomes available after the maximum # of occupied periods are programmed in a day. This example uses 1 as the maximum occupied periods ever programmed in one day.

If no is selected, as in previous steps flashing prompts for input will appear for start and stop times for Occupied 1. If more than one occupied period was selected on page 13, then cool/heat setpoints, and start/stop times for additional occupied periods will be prompted.

PROGRAMMING NOTES

• You will be prompted to enter both heat and cool setpoints even if the thermostat is configured for heat only, or cool only.
• If only 1 Occupied period is selected, the Occupied 2 & 3 steps will be skipped. Further, if only 2 Occupieds are selected, the Occupied 3 steps will be skipped.
• Heat & Cool setpoints for Occupied 1 are the same for each day. Heat & Cool setpoints for Occupied 2 & 3 can be adjusted differently for each day, if desired.
• If the start time is set for later than the stop time, the program will run from the start time to midnight and from midnight to the stop time on the same day.
  For example 9:00 pm start, 8:00 am stop, on MTWTF. This program will run from 12:00 am MTWTF to 8:00am MTWTF and again from 9:00pm MTWTF to 12:00pm MTWTF.
• The Unoccupied settings take effect at all times when: (1) the program is on and (2) the current time is outside a preset occupied period. For this reason start and stop times aren’t necessary for unoccupied.
• If the same start and stop times are programmed in for an occupied period, then it will run 24 hours.
• If one occupied period starts and stops within another occupied period, the lower occupied # has priority.
  For example: If Occupied 3 is programmed to be “on” 24 hours, and Occupied 2 is programmed to run that day, then Occupied 2 settings will take over from Occupied 3 between Occupied 2 start and stop times.
• When the time period programming for Unoccupied is in the Override mode (see page 12), the Heat & Cool setpoints for Occupied 1 are used.

Advanced Setup

Press the MODE and FAN buttons at the same time for 10 seconds to enter Advanced Setup screens.

NOTE: Each step # is located at the top right corner of the display for easy reference.

After programming is complete, press the MODE and FAN buttons at the same time for two seconds to leave the Setup screens. If no buttons are pressed, the display will leave the setup screens after 30 seconds.

About Advanced Features & Operation
CLOCK BACKUP – In the event of a power loss, the thermostat’s internal clock will continue to keep proper time for a minimum of 48 hours without external power or batteries.CALIBRATION – Under normal circumstances, it will not be necessary to adjust the calibration of the temperature sensor. If calibration is required, please contact a trained HVAC technician to correctly perform the following procedure.

About Advanced Features & Operation

DEADBAND OPERATION – Controls one Heat and one Cool stage with a three speed fan (see below). The medium speed fan for heat or cool is turned on when: The temperature spread from the setpoint is equal to or greater than: the setpoint plus the 1st stage deadband (step #8, page 20), plus the 2nd stage deadband. This 2nd stage deadband is fixed at one degree and is not adjustable.

The low-speed fan for heat or cooling is turned on when: The temperature spread from the setpoint is equal to or greater than the setpoint plus the 1st stage deadband (step #8, page 20). This 1st stage deadband is adjustable from 1-6 degrees and the default is two degrees.

The high-speed fan for heat or cool is turned on when: The temperature spread from the setpoint is equal to or greater than: the setpoint plus the 1st stage deadband (step #8, page 20), plus the 2nd stage deadband, plus the 3rd stage deadband. This 3rd stage deadband is fixed at one degree and is not adjustable.

The above figure assumes the minimum on time for the prior stage has been met to allow the next stage to turn on, once the dead bands have been exceeded.

DRY CONTACT SWITCH – This feature allows an external device such as a Central Time Clock, Occupancy Sensor, or a Telephone activated device to force one or more thermostats into Occupied 1 or Unoccupied (steps #14 and 15, page 21-22). When the CK1 and R terminals are shorted together, and the thermostat is programmed for Occupied operation (step #15, page 22) the thermostat will be forced into Occupied 1 setpoints and the Occupied 1 icon will blink.

Note: The thermostat must be in Program On mode for this feature to have any effect.

Dry Contact use note of caution

Auxiliary Input Control and Multiple HVAC Control Potential Phasing Problems

When using the auxiliary input (CK1 & R) or controlling multiple HVAC units with a single thermostat, it is possible to encounter transformer phasing problems that will interfere with thermostat operation. Connecting transformers that are not phased correctly may result in a direct short, which could damage transformers and/or the thermostat. Phasing problems are likely if the units share a common ground with secondary grounded transformers.

SOLUTION: If possible, phase all HVAC units together. If phasing is impractical, isolation relays may be used to isolate the transformers. To isolate the auxiliary input, use a separate transformer for the auxiliary control device, usually a time clock. Connect the device to an isolation relay coil. Connect one set of isolated contacts to each thermostat at CK1 and R. See diagram A.

Diagram A- Auxiliary Control

FACTORY DEFAULTS – If, for any reason, you desire to return all the stored settings back to the factory default settings, follow the instructions below.

WARNING: This will reset all Time periods and Advanced Programming to the default settings. Any information entered prior to this reset will be permanently lost.

FAN OPERATION – Fan operation is available in four different modes:

Fan: When only the fan icon is displayed, this indicates that the fan is in Auto mode, will only energize during a heating or cooling cycle, and will modulate fan speeds based on temperature demand Fan , Fan , or Fan : Pressing the FAN button will cause the low, medium or high-speed fan icon to appear (see page 11), indicating that the fan will run continuously. The fan will de-energize if the thermostat is placed in the Off mode or an unoccupied time period (see page 26).

1. If a Duct sensor is connected to this thermostat, then the fan should be programmed for continuous operation (step #7, page 20). This will provide airflow over the Duct sensor and provide more accurate temperature readings.
2. If the fan is programmed for continuous operation (step #7, page 20), the low-speed fan will run continuously when the fan is in the Auto mode and during occupied time periods but will de-energize if the thermostat is placed in the Off mode.

Notes:

MINIMAL DISPLAY – When the thermostat is programmed for a minimal display (step #3, page 18), only the time of day will appear. When a button is pressed the full, normal display will appear for 10 seconds.

ENERGY SAVING SMART FAN – This feature automatically de-energizes the fan during an Unoccupied time period, except when necessary to heat or cool (see page 28).

Note: The fan will not de-energize during an Unoccupied time period if it has been programmed for continuous operation (step #7, page 20).

HEAT/COOL DIFFERENTIAL – The Heat and Cool setpoints will not be allowed to come any closer to each other than the value set in Advanced Setup step #9, on page 20. This minimum difference is enforced during Auto-changeover and Program On operation.

Note: To increase the spread between the heating and cooling setpoints in the Auto-changeover mode press the MODE button until only the heat setpoint is displayed; adjust to the desired setpoint. Press the MODE button until only the cool setpoint is displayed; adjust to the desired setpoint. Press the MODE button again to enter the Auto-changeover mode where both the heat and cool setpoints are displayed.

KEYPAD LOCKOUT – To prevent unauthorized use of the thermostat, the front panel buttons may be disabled. To disable, or ‘lock’ the keypad, press and hold the MODE button. While holding the MODE button, press the UP and DOWN buttons together. The LOCKED icon will appear on the display, then release the buttons.

To unlock the keypad, press and hold the MODE button. While holding the MODE button, press the UP and DOWN buttons together. The LOCKED icon will disappear from the display, then release the buttons.

About Advanced Features & Operation

OUTSIDE SENSOR – To view an Outside Sensor (step #12, page 21), enter the Advanced Setup by pressing and holding the MODE button. While holding MODE, press the FAN button for 5 seconds to enter Setup screens. Advance to setup step #12 by repeatedly pressing the MODE button. If an optional outside sensor is connected, the outside temperature will appear in the clock display.

REMOTE SENSOR (P/N G100-71520313) – The thermostat is programmed from the factory to automatically recognize when a Remote Sensor is connected (step #12, page 21). The Remote Sensor measures indoor air temperature and sends this information to the thermostat; it measures temperature with a range of 32 to 99 F. The Remote Sensor should be connected to the thermostat using solid conductor CAT 5, CAT 5e, or CAT 6 type network communication cable. This is an unshielded cable with four twisted pairs of 24 gauge solid wire; DO NOT use stranded cable. The cable length should not exceed 250 feet. If less than 75 feet of cable is required to connect the thermostat to the Duct Sensor, a three-conductor thermostat cable (18-24 gauge) may be used; this cable is NOT suitable for any length greater than 75 feet.

Important: Do not use shielded wire. Do not run sensor wiring in the same conduit as the 24vac wiring. Electrical interference may cause the sensor to give incorrect temperature readings.

SINGLE SETPOINT BEHAVIOR – When configured for Single Setpoint operation (step #4, page 19), the degree icon will blink when the large number is displaying room temperature and will remain solid when displaying the heating or cooling setpoint. In the Auto and Program On modes the deadband is enforced both above and below the setpoint. To avoid short cycling, a deadband of at least two degrees is recommended (step #8, page 20). To display the room temperature press and hold the MODE button for two seconds. Release the MODE button to return to the normal display.

Warranty

INTERNATIONAL ENVIRONMENTAL CORPORATION – TERMS AND CONDITIONS

1. ORDER ACKNOWLEDGEMENTS SHALL ONLY BE BINDING UPON INTERNATIONAL ENVIRONMENTAL CORPORATION (HEREINAFTER REFERRED TO AS IEC) IF GENERATED AND AUTHORIZED BY A REPRESENTATIVE OF IEC AT ITS OFFICE IN OKLAHOMA CITY, OKLAHOMA.
2. IEC DOES NOT BUILD ITEMS TO PLANS AND SPECIFICATIONS. IEC AGREES TO FURNISH ONLY THE ITEMS AS DESCRIBED IN IEC’S ORDER ACKNOWLEDGEMENT UNLESS IEC’S OFFICE IN OKLAHOMA CITY, OKLAHOMA, HAS PREVIOUSLY RECEIVED AND ACCEPTED, IN WRITING, APPROVED SUBMITTALS FROM THE PURCHASER.
3. PRICES QUOTED ARE FIRM ONLY IF PURCHASER RELEASES THE GOODS COVERED BY THIS ORDER FOR IMMEDIATE PRODUCTION BY IEC WITHIN NINETY (90) DAYS FROM THE DATE OF THE PURCHASER’S OFFER TO PURCHASE AND FOR SHIPMENT BY IEC WITHIN THE ACKNOWLEDGED SHIPPING DATE WHICH SHALL NOT EXCEED SIX (6) MONTHS FROM THE DATE OF PURCHASER’S OFFER TO PURCHASE. IF PURCHASER DOES NOT MEET THE TERMS AND CONDITIONS OF THIS PARAGRAPH, THE PRICES ARE SUBJECT TO ESCALATION TO THOSE PRICES IN EFFECT AT TIME OF SHIPMENT WITHOUT NOTICE TO PURCHASER.
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   • IEC MAKES NO IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
   • IN THE EVENT OF A BREACH OF THE ABOVE WARRANTY OR NEGLIGENCE ON THE PART OF IEC, IEC SHALL ONLY BE OBLIGATED TO EITHER REPAIR OR REPLACE, AT IEC’S OPTION, THE GOODS, AND THE AFORESAID OBLIGATION OF IEC TO REPAIR OR REPLACE THE GOODS IS THE PURCHASER’S EXCLUSIVE REMEDY. IEC SHALL NOT, IN ANY MANNER WHATSOEVER, BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS, OR EXPENSES FOR BREACH OF WARRANTY, OR FOR NEGLIGENCE ON THE PART OF IEC.
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   • THIS WARRANTY SHALL BE VOID FOR ANY GOODS WHICH (1) HAVE BEEN REPAIRED OR ALTERED OUTSIDE IEC’S FACTORY IN ANY MANNER WITHOUT IEC’S WRITTEN AUTHORIZATION; OR (2) HAVE BEEN SUBJECT TO MISUSE, NEGLIGENCE, OR ACCIDENTS; OR (3) HAVE BEEN OPERATED IN A MANNER CONTRARY TO IEC’S PRINTED
     INSTRUCTIONS: OR (4) HAVE NOT BEEN PAID FOR WITHIN PAYMENT
     TERMS GRANTED BY IEC.
8. IEC SHALL HAVE NO SYSTEM DESIGN, APPLICATION OR MAINTENANCE RESPONSIBILITY OR RESPONSIBILITY FOR MOLD, FUNGUS OR BACTERIA TO THE PURCHASER OR ANY OTHER THIRD PARTY.
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15. ALL ORDERS ARE EXPRESSLY LIMITED AND MADE CONDITIONAL UPON ACCEPTANCE BY PURCHASER OF THE TERMS AND CONDITIONS LISTED ABOVE WITHOUT CHANGE. THERE SHALL BE NO UNDERSTANDINGS, AGREEMENTS, OR OBLIGATIONS (OUTSIDE THESE TERMS AND CONDITIONS) UNLESS SPECIFICALLY SET FORTH IN WRITING, AND ACCEPTED BY SIGNATURE OF AN AUTHORIZED REPRESENTATIVE OF IEC IN OKLAHOMA CITY, OKLAHOMA.

It is the responsibility of the end user to properly characterize and dispose of all waste materials according to applicable regulatory and legal entities. Where reasonable, safe, and compliant with local regulatory and legal requirements, IEC encourages recycling materials when disposing of its products.

5000 W I-40 Service Rd.
Oklahoma City, OK 73128
405.605.5000 [phone]
405.605.5001 [fax]
www.iec-okc.com
©2019 International Environmental Corporation (IEC).

Reference

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Iec E055-71520317 Programmable Fan Coil Thermostat Owners Manual

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