. INSTALLATION INSTRUCTIONS E2007 Lennox Industries Inc. Dallas, Texas, USA 3 Heat / 2 Cool Programmable Touch Screen Thermostat WARNING This thermostat is to be installed by a qualified service technician or other qualified agency in accordance with the manufacturer’s instruc- tions, all codes, and requirements of the authority having jurisdiction. Troubleshooting.Page 20 Electrical tape General Thermostat Location The Lennox X4147 programmable Install the thermostat about 5 feet touch-screen thermostat provides (1.5m) above the floor in an area with control for up to three stages of heating good air circulation. carried on the replacement wall- Remove Existing Thermostat plate.

If this thermostat is being used to re- Do not allow the thermostat wires place an existing thermostat, remove to fall behind the drywall. The old thermostat: 1 − Turn off power at the heating and/ WARNING or cooling system or fuse/circuit breaker panel. 6 − Position the wallplate over the an- Thermostat Installation chors and pull the thermostat The thermostat may be installed hori- wires back through the wiring zontally in a 4 in.

(101.6 mm X opening. 50.8 mm) wiring box or on the wall us- 7 −. 1 − Make wiring connections per the the loosened screws. Securely appropriate wiring diagram on tighten each screw. Refer to the table TERMINAL below for terminal designations. BLOCK LETTER DESIGNATIONS Terminal Description Second−stage cooling WALLPLATE Second−stage heating W2 (AUX) (or auxiliary heating) WIRE HOLE.

Field Wiring Diagrams TYPICAL CONVENTIONAL MULTI−STAGE APPLICATION TWO−STAGE HEAT / TWO−STAGE COOL TYPICAL MULTI−STAGE HEAT PUMP APPLICATION NO AUXILIARY HEAT TYPICAL MULTI−STAGE HEAT PUMP APPLICATION WITH AUXILIARY HEAT Page 6. Field Wiring Diagrams (Continued) TYPICAL SINGLE−STAGE HEAT PUMP SYSTEM WITH AUXILIARY HEAT TYPICAL SINGLE−STAGE HEAT PUMP SYSTEM WITHOUT AUXILIARY HEAT Page 7. WALLPLATE Install Batteries 1 − Install three provided AAA alkaline batteries in the back of the thermo- PINS ON stat as shown. BACK OF THERMOSTAT BACK OF THERMOSTAT TERMINAL SCREW BLOCK Set Calendar and Clock This thermostat is designed to auto- BATTERIES matically keep the current time and date in memory for up to ten years, un. Heating Mode Operation Advanced Heat Pump Features Outdoor Temp. Below Balance Point When the outdoor temperature is be- The thermostat installer set−up may be low the selected balance point, only configured in several different ways to the furnace (fossil fuel) operates to sat- ensure the desired system operation.

Heat Pump Application When the outdoor temperature is Electric Auxiliary Heat above the auxiliary lock−out tempera- with Outdoor Temperature Sensor ture (balance point), only the compres- sor operates. Installer set−up number 0170 −− heat pump.

When the outdoor temperature is be- tween the two temperatures, both the Installer set−up number 0200 −−. Installer Set−Up Use the following steps and the Install- ADVANCE TO NEXT INSTALLER INSTALLER SET−UP er Set−Up menu to match the thermo- SET−UP NUMBER CURRENT stat to the HVAC system. SETTING 1 − Press and release the SYSTEM key. 2 − Press and hold the two blank keys on either side of the center blank key for approximately five sec- onds.

Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No. Name Select first two digits of current calendar Date year (20 for 2007, etc.) 0120 (Year/ first) Factory setting = 20. Date Select last two digits of current calendar 0130 (Year/ year (07 for 2007, etc.). Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No. Name Available only if 0 − Gas or Oil Heat −− Heating system conventional controls fan during heating demand. System chosen.

Factory setting. Control 0180 Setting defaults Heating to electric heat 1 −. Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No. Name Cycles per Hour 1 − Recommended for use with steam and (cph) 2nd gravity. Stage Conven- 3 − Recommended for use with hot water tional heat and high−efficiency (90% or higher) Shown only Heating. Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No.

Lennox Thermostat Manual Commercial

Name 0 − Manual changeover from heating mode to cooling mode. Factory setting. Change- 0300 over 1 − Auto−changeover from heating mode to cooling mode. 2 − 2°F (1.5°C) Dead- 3 −.

Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No. Name 0 − No auxiliary heat lock−out. Factory Shown only if setting.

Electric is se- Heat 40°F (4.5°C). Lected for back− Pump up heat source 45°F (7°C) 0360 Auxiliary and outdoor. Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No. Name Heat Settings of 40 − 90 available in 1°F in- Tempera- Shown in 1/2°C creme. 0600 ture increments Range Factory setting = 90.nts. (°F) Cool Settings of 50 −. Instal- Installer Selection Description lerSet− Set−Up Notes (Factory setting in bold print) Up No.

Lennox Thermostat Manual X4147

Name 1 − Less aggressive control. (Cooling may Cooling turn off before setpoint reached). Mode Applies to re- 2 − Standard control. Factory setting. 0690 Tempera- covery ramp. System Test The system test function allows the in- 4 − The installer test number is dis- staller to check the HVAC system after played on the upper portion of the the thermostat set−up has been com- screen. Press the up or down ar- pleted.

Troubleshooting Symptom Possible Cause Action 1− Check to see that there is 24V between R and C terminals. Display does not come Thermostat is not being powered. 2− Check to see that bat- teries are properly installed. 1− Check temperature set- points.

Note: This article is scheduled for a complete re-write. In the meantime, the following Q and A may address a very common issue.

Q: I installed my new programmable thermostat, but it won’t turn on. A: If you plan to upgrade to a new thermostat make sure you have the proper number of wires available, otherwise your new thermostat won’t work (most advanced Honeywell thermostats require a common (C) wire to power on). If you do need additional wires, you will want to consider how difficult installing new wires will be for your application, and if you need to budget for an electrician or HVAC tech to install the proper wiring. NOTE: This article provides the basics of what to expect and look for when wiring a new or existing thermostat. With the many brands and models of thermostats existing, along with the numerous issues that could arise with corresponding devices, we suggest contacting the thermostat manufacturer technical department or have a professional local service tech do an inspection of your system if not operating properly. 5 Wire Honeywell Thermostat Wiring Some programmable thermostats (e.g. Honeywell Prestige wiring requirements) need a minimum of 5 wires, and maybe more depending on what features you want to operate (humidifier, etc).

The additional 5th wire will be for common; providing stepped down power from a transformer. G – Fan (green wire). R – 24 VAC / R and Rc (red wire).

Thermostat

C – 24 VAC Common (color can vary per manufacturer – may be blue, purple, brown. Etc.). Y – Compressor / air conditioner (yellow wire). W – Heat (white wire) Furnace Electrical Board Connections Going into your furnace may sound intimidating, but if you have the basic knowledge of wiring, and know how to remove the proper furnace panels to access the electronics, then you should be fine. The COM 24V terminal will be connected to the C (24 VAC common) of the thermostat. How to Install Thermostat Wire If you have easy access to the existing thermostat wires, just remove and follow the same path with the new set of wires.

Manual

You can use cable ties, electrical tape, or staples. Be sure to take a very conservative measurement on how long your new set of wires should be. You don’t want to start over, if you come up short. Any home improvement store should carry thermostat wiring. Also check local electrical and lighting supply houses.

Lennox

If wires pass through a floor and up into a wall cavity before reaching a thermostat. Try the following. Start at the thermostat location. (i) A simple trick for pulling new wires to replace existing ones: tape one end of the new wires to the end of the existing wires coming through the electrical box or wall opening. Make sure to tape completely over the wire ends, so no edges are present that can snag something. ( image below). Slowly pull the new set of the wires down through the wall from the basement.

(i) Use any object larger than the hole in the wall, and tie or fasten to the end of your new wires, so you don’t pull all the wire through the wall. Pencil or flat washer, to act as a stop.

Use electrical tape to secure if necessary. In a situation where the original thermostat wires may have been stapled to an interior wall stud, and not run through conduit, you may be better off leaving the existing set of wires, and cutting them off at the entry and exit points of the wall. Then feed new wires with a fish tape. Check your local home improvement stores, or local tool rental, for rental availability.