CTC 71157P Programmable Thermostats Installer Manual

CTC 71157P Programmable Thermostats 

Warning
For installation by experienced service technicians only.
Caution

• A possible electric shock or damage to equipment can occur.
• Disconnect power before beginning installation.
  This thermostat requires 24 Volt AC Power or 2 properly installed “AA” Alkaline batteries for proper operation. When connecting 24 Volt AC Power the batteries may be installed as a backup.
  For use only as described in this manual. Any other use will void the warrant.

Specification

This thermostat is compatible with:

• Single-stage heat / cool conventional and heat pump systems
• Conventional systems up to 2 stages of heating and 2 stages of cooling (73257P only)
• Heat pump systems up to 3 stages of heating and 2 stages of cooling (73257P only)
• 250 – 750 millivolt heating-only systems
• 2 or 3-wire hydronic zone systems

Electrical and control specifications:

• Electrical Rating: 24 Volt AC
• 1 amp maximum load per terminal
• AC Power: 18 – 30 Volts AC
• DC Power: 3.0 Volt DC (2 “AA” Alkaline Batteries Included)
• Control Range: 45° – 90° F (7° – 32° C)
• Temperature Accuracy: +/- 1° F (+/- .5° C)
• Outdoor Temperature Display Range: -40° – 120° F (-40° – 49° C)

Terminations

• 71157P: Rc, Rh, G, W1, 0/B/V3, Y1, C, S1, S2
• 73257P: Rc, Rh, G, W1/E/W3, W2, 0/B/V3, Y1, Y2, L, C, S1, S2 71157P-100-01

Installation and Wiring

Install your new CTC® thermostat in 4 basic steps:

1. Install the sub-base
2. Provide Power
3. Connect your wires
4. Attach the thermostat to the sub-base

Install the Sub-Base

• Remove the sub-base from the body of the thermostat.
• Mount the sub-base as shown below:

Drill 3/16″ pilot holes in your desired location. Use supplied anchors for drywall or plaster.

Provide Power

For battery power, insert the 2 supplied “AA” type alka- line batteries into the battery compartment located in the rear housing of the thermostat. Make sure to position the Positive (+) and Negative (- sides of the batteries cor- rectly with the +/- symbols in the battery compartment. For 24 Volt AC power, you must connect the common side of the transformer to the C terminal on the thermostat sub-base. In dual transformer installations, the transformer common must come from the cooling transformer.

Connect Your Wires

Wiring Terminations for model 71157P

Wiring Terminations for model 73257P

Conventional Systems
Typical Wiring Configurations
NOTE: The “System Type” option will be configured in the Installer Settings section. The 71157P is a single-stage thermostat and not intended for multi stage equipment.

Heat Only or Millivolt
Set System Tune to 11CONV
1 HEAT / 1 COOL Single or Dual Transformer
Set System Type to 11CONV

Typical Wiring Configurations
NOTE: The “System Type” option will be configured in the Installer Settings section. The 71157P is a single-stage thermostat and not intended for multi stage equipment.
2 HEAT / 2 COOL Single or Dual transformer: Set System Type to 22CONVHydronic Heat Only
Set System Type to 1HD)
Hydronic Heat / 1 Cool
Set Svstem Tvpe to 11HD

NOTES – Conventional Systems

1. Optional 24 Volt AC common connection.
2. Remove factory-installed jumper for dual transformer systems.
3. In dual transformer systems, the transformer common must come from a cooling transformer.
4. If needed for the system.
   Provide disconnect and overload protection as required.

Additional Wiring Options
NOTE: Additional options are configured in the Installer Settings section.

s1: s2
Indoor or Outdoor Remote Sensor

NOTES – Additional Wiring Options

1. These terminals can be used to connect a CTC® indoor or outdoor remote sensor.

Heat Pump Systems
Typical Wiring Configurations
NOTE: The “System Type” option will be configured in the Installer Settings section. The 71157P is a single-stage thermostat and not intended for multi-stage equipment.
1 HEAT / 1 COOL – No Auxiliary Heat
Set System Type to 11HP

• Rh 24 Volt AC Power
• Rc Connected to Rh with supplied Jumper Wire
• 0/B: Changeover Valve note 21
• Y1 : Compressor Relay
• G : Fan Relay
• 24 : Volt AC Transformer Common [note 1]

2 HEAT / 2 COOL – No Auxiliary Heat
Set System Type to 32HP

• Rh 24 Volt AC Power
• Rc Connected to Rh with supplied Jumper Wire
• 0/B Changeover Valve [note 2]
• Y1 Compressor 1 Relay (1st stage heating/cooling)
• Y2 Compressor 2 Relay (2nd stage heating/cooling)
• G:Fan Relay
• C:24 Volt AC Transformer Common [note 11
• L : Optional System Fault Monitor [note 41

2 HEAT / 1 COOL – Including Auxiliary Heat
Set System Type to 22HP

• Rh 24 Volt AC Power
• RC : Connected to Rh with supplied Jumper Wire
• 0/B Changeover Valve [note 2]
• Y1 Compressor Relay (1st stage heating/cooling)
• W2 Auxiliary Heat Relay (2nd stage heating) [note 3]
• E: Emergency Heat Relay [note 3]
• G “: Fan Relay
• 24 Volt AC Transformer Common [note 11
• Optional System Fault Monitor [note 4]

3 HEAT / 2 COOL – Including Auxiliary Heat
Set Sustem Tvne to 32HP

• Rh :24 Volt AC Power
• Re:Connected to Rh with supplied Jumper Wire
• 0/B:Changeover Valve [note 2]
• Y1:Compressor 1 Relay (1st stage heating/cooling)
• Y2:Compressor 2 Relay (2nd stage heating/cooling)
• E/W3 Auxiliary Heat Relay (3rd stage heating) note 5]
• Fan Relay:24 Volt AC Transformer Common [note 11
• L:Optional System Fault Monitor [note 41

NOTES – Heat Pump Systems

1. Optional 24 Volt AC common connection.
2. O (cool active) or B (heat active) is selected in the Installer Settings menu.
3. Install a field-supplied jumper between the W2/AUX2 and W1/E/W3 terminals if there is no separate emergency heat relay installed.
4. If the L terminal is used, the 24 Volt AC common must be connected (C terminal).
5. If a separate emergency heat relay is installed, the W1/E/W3 terminal should have both the auxiliary heat 1 relay and emergency heat relay connected.

Provide disconnect and overload protection as required.

Additional Wiring Options
NOTE: Additional options are configured in the Installer Settings section.

Additional Wiring Options
NOTES

1. These terminals can be used to connect a CTC® indoor or outdoor remote sensor.

Attach Thermostat to Sub-Base

1. Line up the thermostat body with the sub-base.
2. Carefully push the thermostat body against the sub-base until it snaps in place.
3. Insert Quick Reference Card into slot on top of the thermostat.
   NOTE: This thermostat ships configured as a 1H/1C conventional thermostat. Confirm installer settings.

Quick Reference

Thermostat

1. Reset Button …Resets current time, program and user settings
2. YSTEM Button …Selects the system you want to control
3. DAY/TIME Button. .. Sets the current time and day of the week PROG Button.
4. Selects programming mode or press for 3 seconds to select quick-setting mode
5. BACK Button*. …..……………. The secondary function of the PROG button – moves back a setting
6. HOLD Button…………………….. Enters/Exits the HOLD mode (program bypass) NEXT Button*
   ..Secondary function of the HOLD button – moves to next setting
7. RETURN Button ..Returns to normal mode from program or setting modes
8. FAN Button…Selects the system fan mode
   Quick Reference Instructions …Stored in the slot located at top of the thermostat
9. Up/Down (/V) Buttons.. …Increases or decreases settings (time, temperature, etc.)
10. Outdoor Temperature ……. …..If a CTC® outdoor sensor was connected you can view the outdoor temperature by pressing the PROG and HOLD buttons at the same time.

Installer Clear Button …………….. Located on the back of thermostat body – clears all settings
Battery Compartment ……….. Located in the back of the thermostat
* BACK and NEXT are secondary functions of the PROG and HOLD buttons. When in programming or configuration modes, BACK and NEXT appear in the display, indicating that the PROG and HOLD buttons now function as BACK and NEXT.

Installer Settings

The Installer Settings must be properly configured in order for this thermostat to operate correctly. The Installer Settings are menu driven. The portion of these settings that do not apply to your setup will be skipped. These settings are indicated below with comments. More detail on each setting follows this table.

1. Press and hold down the RETURN and V buttons for 3 seconds.
2. Release both buttons and the first installer setting will be displayed.
3. Change settings as required using the A or V buttons.
4. Press NEXT (HOLD) or BACK (PROG) to move to the next or previous setting, press RETURN to exit.

NOTE: Shaded areas below do not apply to the 71157P.

*When a CTC outdoor sensor is connected, the thermostat automatically recognizes it. Press PROG and HOLD at the same time to display outdoor temperature.
NOTE: Additional options such as Service Monitors, setting the lock code, etc. are located in the
User Settings – See User manual for information on setting these options.
NOTES – Installer Settings

1. Only available if Residential profile was selected in option 1.
2. Only available if a 2 or 3-stage system type was selected in option 6.
3. Only available if a Conventional system was selected in option 6.
4. Only available if a 2 or 3-stage Heat Pump system was selected in option 6.
5. Only available if a Heat Pump system was selected in option 6.
6. Only available if the 24 Volt AC common wire is connected to the C terminal.
7. Not available if a heat-only hydronic system is selected in option 6.
8. Only available if a programmable profile was selected in option 2.
9. Only available if a CTC® indoor remote sensor was connected.
10. Only available if auto changeover was enabled in option 5.
11. Only available if a CTC outdoor sensor was connected.

Detailed Explanation of Installer Settings (also see NOTES above):

1. Profile – Select a residential (RES) or commercial (COMM) profile. If residential is selected, 4 programming events per day are available. If the commercial is selected, 2 event, 7 day programming is available.
2. Programming Mode [note 1] – Selects the programming mode, either full 7-day or 5-2 day (weekday/ weekend) programming or non-programmable.
3. Clock Type – Select either a 12-hour or 24-hour clock.
4. Temperature Scale – Select a temperature scale of either °F or °C.
5. Auto Changeover – Selects auto changeover on or off. When auto changeover mode is enabled and selected, the system automatically switches between heating and cooling modes. There is a 5-minute delay when switching from heating to cooling or cooling to heating in auto changeover mode.
   NOTE: Also see “Auto Changeover Dead Band” in option 21.
6. System Type – Select the system type for your installation.
   NOTE: Changes made to this option will reset options 7 through 15 back to their default values depending on the system type.
7. 1st Stage Differential – Selects a 1st stage temperature differential.
8. 2nd Stage Differential [note 2] Selects a 2nd stage temperature differential.
9. 3rd Stage Differential [note 2] – Selects a 3rd stage temperature differential.
10. 1st Stage Fan Control [note 3] – Selects a 1st stage fan control of either gas or electric heat.
11. Emergency Heat Fan Control [note 4] – Selects emergency heat fan control of either gas or electric heat.
12. Reversing Valve [note 5] – Selects the output state of the O/B terminal. Select O for this terminal to be active in the cool mode or select B for this terminal to be active in the heat mode.
13. Auxiliary Fossil Fuel Heat Pump Control [note 4] – When set to electric (AE AUX), both the compressor (1st stage) and auxiliary stages) will run when a call for auxiliary heat is made. When set to gas (AG AUX), the compressor stage(s) will be locked out one minute after a call for auxiliary heat.
    NOTE: This option can be overridden if setting an auxiliary heat balance point in Option 23.
14. Compressor Power Outage Protection [notes 4, 6] – Selects power outage protection on or off. When enabled, this thermostat will provide cold weather compressor protection by locking out the compressor stage(s) of heating for a period of time after a power outage greater than 60 minutes.
15. AC Power Interrupt Warning [note 6] – When enabled, the thermostat will display an outage warning when AC power to the thermostat is lost.
16. Short Cycle Protection [note 7] – Selects the number of minutes the cooling compressor will be locked out after turning off. This short cycle protection is also active in the heat mode if a heat pump system was selected in Option 6.
17. Residual Cooling Fan Delay [note 7] – Selects a delay for the system fan after the cooling compressor has turned off. This delay will help remove the remaining cool air from the ductwork providing additional efficiency.
18. Adaptive Recovery Mode (early recovery) [note 8] – Enables or disables the ARM™ (adaptive recovery mode) feature. During ARM, room temperature is recovered by turning on the heating or cooling before the end of the set-back period. The set point temperature is changed to that of the upcoming program temperature.
19. Indoor Remote Sensor Control [note 9] – If a CTC® indoor remote sensor is connected during installation, the thermostat will automatically detect the sensor. When an indoor sensor is detected, you may select between thermostat only (I SENS), the remote sensor only (E SENS), or combine the thermostat and the remote sensor (A SENS). NOTE: This option does not apply to a CTC outdoor sensor. When an outdoor sensor is connected the thermostat automatically recognizes it and no further configuration is necessary.
20. Lockout Security Level – Selects the level of keypad lockout when the thermostat is locked. Level 2 locks the entire thermostat (including the front reset button. Level 1 locks everything except the 1 / V buttons, allowing for temperature adjustment. NOTE: The lock code is set in the User Settings mode (see User Manual).
21. Auto Changeover Dead Band [note 10] – When auto changeover mode is enabled in option 5 and selected, the system automatically switches between heating and cooling when the room temperature meets the normal criteria for either a heating or cooling call. There is a forced separation (dead band) between the heating and cooling set points so that the systems do not work against each other. This option selects the amount of this dead band in degrees with the default being 3° F.
22. Compressor Balance Point [notes 4, 11] – Locks out the use of the compressor heat stage when the outside air temperature is less than the selected setting of 15° F to 50° F (-9° C to 10° C
23. Auxiliary Heat Balance Point [notes 4, 11] – Locks out the use of the auxiliary heat stage when the outside air temperature exceeds the selected setting of 70° F to 40° F (21° C to 4° C). NOTE: This balance point overrides the fossil fuel compressor lockout in option 13. If this option is set to gas and the outdoor temperature is over the auxiliary balance point, the compressor will remain on during a call for auxiliary heat.
24. Heat Set Point Upper Limit – Select the heating set point upper adjustment limit.
25. Cool Set Point Lower Limit [note 7] – Selects the cooling set point lower adjustment limit.

System Testing

Warning Read Before Testing

• Do not short (or jumper) across terminals on the gas valve or at the heating or cooling system control board to test the thermostat installation. This could damage the thermostat and void the warranty.
• Do not select the COOL mode of operation if the outside temperature is below 50° F (10° C). This could possibly damage the controlled cooling system and may cause personal injury.
• This thermostat includes an automatic compressor protection feature to avoid potential damage to the compressor from short cycling. When testing the system, make sure to take this delay into account.
  NOTE: The compressor delay can be bypassed by pressing the reset button on the front of the thermostat. All user settings will be returned to factory default, however, all Installer settings will remain as originally programmed in section 4.

1. Press the SYSTEM button until the thermostat is in HEAT mode.
2. Use the / button to raise the set temperature a minimum of 3 degrees above the current room temperature. The system should start within a few seconds. With a gas heating system, the fan may not start right away.
3. Press the SYSTEM until the thermostat is in the OFF mode. Allow the heating system to fully shut down.
4. Press SYSTEM until the thermostat is in the COOL mode.
5. Use the V button to lower the set temperature to a minimum of 3 degrees below the current room temperature. The system should start within a few seconds (unless compressor short cycle protection is active – See note above).
6. Press the SYSTEM until the thermostat is in the OFF mode. Allow the cooling system to fully shut down.
7. Press FAN until the thermostat is in FAN ON mode. The system fan should start within a few seconds.
8. Press FAN until the thermostat is in FAN AUTO mode. Allow the system fan to turn off.

CT Thermostats Limited Warranty

CT warrants your TC thermostat to be free from defects in material or workmanship for a period of three years from the date of sale to the original user or consumer purchaser. If your TC thermostat malfunctions or fails within the warranty period because \ of a defect in material or workmanship, we will replace it. THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS WARRANTIES. THE DURATION OF ANY IMPLIED WARRANTY, BUT NOT LIMITED TO. ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, INRESPECT TO YOUR CTC THERMOSTAT IS LIMITED TO THE PERIOD OF THE EXPRESS WARRANTY SET FORTH ABOVE. This warranty is voided if your TC thermostat is not purchased and used in the USA. This warranty excludes and does not cover defects, malfunctions or failures of your TC thermostat which were caused by repairs by persons not authorized by us, mishandling, improper installation, modifications or damage to the CTC thermostat while in your possession, or unreasonable use, including failure to provide reasonable and necessary maintenance.

REFERENCE:

DOWNLOAD MANUALS:

CTC 71157P Programmable Thermostats Installer Manual

OTHER MANUALS:

CTC 71157P Programmable Thermostats User Manual

CTC 71157P Programmable Thermostats Installer Manual