Quick Start Guide

CONTROLS QUICK START GUIDE

2012 Lennox Industries Inc. 506919−01 Dallas, Texas, USA THIS MANUAL MUST BE LEFT WITH THE icomfort Wi-Fit Thermostat 08/12 HOMEOWNER FOR FUTURE REFERENCE Supersedes 04/12 INSTALLATION INSTRUCTIONS

Installation D. Feed the thermostat wires through the opening in the baseplate. Align the thermostat mounting bracket with the anchors and fasten to wall with four icomfort Wi-Fit 1. Unpack the thermostat and separate the baseplate from the thermostat by outdoor away screws being sure to maintain level. indoor temperature set temp temperature mode using hand slot (shown in figure 4) and pulling apart, tilting away from the Communicating E. Trim 1/4" insulation from end of each wire (figure 3, wiring detail A). Insert heat 80 75 or top. Open to 45 degrees and separate the two halves. Thermostat, cool−to cool the trimmed ends of the wires in the appropriate holes on the bottom of the Touch Screen, 2. When determining the location for the Wi−Fi thermostat, be sure it is in an thermostat’s terminal block and tighten the screws to secure the wires (fig- 72 fan is area near enough to the homeowner’s router to ensure good communica- AUTOfan is heat to ure 3, wiring detail B). 7−Day AUTOOFF indoor humidity is 41% tions signal between the thermostat and the router. (Hint: use a smart Programmable phone with Wi−Fi to find and determine signal strength.) THERMOSTAT

system is cooling 3. Install thermostat using wall mounting instructions (figures 1 through 4). TERMINAL BLOCK

9:39 am January 23, 2012 4. Connect wiring between thermostat, indoor unit, and outdoor unit and other devices as shown in the wiring diagrams (figures 5). THERMOSTAT 1/4" B WIRES Wall mounting instructions *2P0812* *P506919-01* A A. Use a level to align the thermostat baseplate against the wall where the thermostat will be installed (see figure 1). Mark an appropriate hole location Figure 3. Wiring details on the wall for routing the wires and mark (4) mounting holes at the same F. After running the thermostat wire through the hole, seal to prevent air from time. the wall cavity from affecting the thermostat’s temperature sensor. NOTICE LEVEL G. Align the tabs on the thermostat with the slots on the base, holding it at Before beginning installation, note the type of equipment, number of about a 45 degree angle to the wall. When the tabs seat into the slot, rotate MAKE A HOLE the thermostat upward until it snaps into place (see figure 4). stages, and any accessories being installed. The icomfort Wi-Fit ther- JUST LARGE mostat is a 24VAC Class 2 thermostat and requires a common wire to ENOUGH TO the thermostat to operate. BRING FOUR 6 HOLE THERMOSTAT LOCATIONS; WIRES MARK 4 FOR HAND SLOT NOTE: Return mercury-switch thermostats, intact, to participating re- THROUGH MOUNTING cycling wholesalers at hundreds of locations across the nation. For a list WALL BASEPLATE. of participating wholesalers, see www.nema.org/trc. If your wholesaler is not participating, ask them to start now. Figure 1. Hole locations DO B. Drill (4) 3/16" holes in wall for anchors. Insert wall anchors in holes (see fig- Shut off all power to system before installing. ure 2) and tap the anchor until flush with the wall. THERMOSTAT WIRE Read this entire document, noting which instructions pertain to your equipment & system requirements. Also, consult Installer’s Guide 506920−01. BASE- Make sure that all wiring conforms to local and national building and electrical INSERT WALL PLATE codes and ordinances. ANCHORS IN Use 18 gauge thermostat wire or larger. HOLES. TAB Install all sensors and accessories before powering up. NOTE − If electric heat strips are used, the strips MUST be configured on the air TAP ANCHORS handler control (AHC) board before beginning the discovery" sequence as de- SCREWS THERMO- SLOT UNTIL STAT scribed in the Installer’s Guide. FLUSH WITH (USE AT WALL. LEAST 4) DO NOT Figure 4. Installing thermostat onto bracket Install on voltages higher than 30VAC. Date Revision History Install on outside walls or in direct sunlight. Figure 2. On−wall mounting Install in commercial applications unless used with approved split-system C. Route the thermostat wire and feed approximately six inches of wire 04−2012 Preliminary release matches. through the hole and into the room. 08−2012 Minor changes 08/12 506919−01 *2P0812* *P506919-01* CONTROLS QUICK START GUIDE 2012 Lennox Industries Inc. Dallas, Texas, USA icomfort by Lennoxt icomfort by Lennoxt Communicating Indoor Unit Optional Accessories for use with any icomfort by Lennoxt system Communicating Systems / non−Communicating Outdoor Unit NOTE: icomfort Wi-Fi THERMOSTAT SENSES HUMIDITY & CONTROLS 24V H" OUTPUT (& 120V HUM" OUTPUT) TO icomfort Wi-Fi Thermostat icomfort Wi-Fi Thermostat CYCLE HUMIDIFIER BASED ON DEMAND. NO OTHER CON- icomfort Wi-Fi Thermostat icomfort by Lennox TROL OR HUMIDISTAT REQUIRED. icomfort by Lennox Air Handler icomfort by Lennox Indoor Furnace or SLP98 & G71MPP icomfort by Lennox Indoor Furnace or Air Handler OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDI- Standard Outdoor Heat Pump Air Handler FURNACE (IFC) OR FIER (IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNC- HCWH−01 icomfort by Lennox Outdoor Condensing Unit or AIR HANDLER (AHC) Standard Outdoor Condensing Unit TIONS. BUILT INTO ALL icomfort by Lennox OUTDOOR UNITS). DEHUMIDIFIER CONTROL Heat Pump icomfort by Lennox DISCHARGE AIR (SEE OAS NOTE) W Rf Cf FURNACE (IFC) SENSOR (RE- HVAC EQUIP For SL290 & EL296, see HUMIDIFIER diagram below OR icomfort by Lennox icomfort by Lennox QUIRED FOR Gs

AIR HANDLER (AHC) AIR HANDLER (AHC) FURNACE (IFC) OR EVEN HEAT) Gh OPTIONAL AIR HANDLER (AHC) (SEE DAS NOTE) OPTIONAL DISCHARGE AIR OPTIONAL DH OUTDOOR SENSOR (SEE icomfort Wi-Fi HVAC DISCHARGE AIR OPTIONAL DIS- EQUIPMENT AIR SENSOR DAS NOTE) THERMOSTAT NC SENSOR (SEE CHARGE AIR (SEE OAS DAS NOTE) SENSOR (SEE NOTE) DAS NOTE) AUXILIARY DEHUMIDIFIER 090 & 135 OPTIONAL capacities only (065 not compatible) OUTDOOR AIR SENSOR (SEE icomfort Wi-Fi RSBus THERMOSTAT icomfort Wi-Fi OAS NOTE) OPTIONAL THERMOSTAT Maximum total icomfort Wi-Fi OUTDOOR AIR length of all con- icomfort by Lennox SL280, EL296 FURNACE THERMOSTAT SENSOR (SEE nections on the OAS NOTE) RSBus is limited icomfort to 1500ft. Wi-Fi thermostat RSBus Wire gauge of icomfort by Lennox Maximum total RSBus wire is 18. OUTDOOR AIR CON- length of all connec- icomfort DITIONING OR HEAT tions on the RSBus enabled PUMP UNIT is limited to 1500ft. RSBus STANDARD outdoor unit Wire gauge of OUTDOOR HEAT STANDARD RSBus wire is 18. PUMP UNIT − 1 OUTDOOR AIR OR 2 STAGE CONDITIONING 48G96 Relay UNIT − 1 OR 2 GND STAGE IN

RSBus

120VAC<−−−−−−−HUMIDIFIER CONNECTIONS−−−−−−> 24VAC IMPORTANT! − Thermostat does not icomfort by Lennox support a NON−communicating 2−STAGE FURNACE HEAT PUMP with communicating icomfort by Lennox OUTDOOR AIR FURNACE (dual fuel). DS Maximum total length of all CONDITIONING OR icomfort by Lennox connections on the RSBus is limited HEAT PUMP UNIT FURNACE OR AIR to 1500 ft. (450 m). CUT icomfort by Lennox LVCS VENTILATION HANDLER R−DS FURNACE (IFC) OR CONTROL SYSTEM Max. length between components is W914 R AIR HANDLER (AHC) 300 ft. (90 m). icomfort by Lennox HEPA Bypass Filter X2680 HEPA NOTE: 24V UV LIGHT APPLICATIONS FURNACE OR STANDARD IMPORTANT! Interlock Kit AIR HANDLER 1 OR 2 STAGE In an icomfort by Lennox system, nei- AC OR HP UNIT (POWER COMPANY BEFORE POWERING THERMOSTAT Pass indoor ther furnace nor air handler transformer icomfort Wi-Fi INTERRUPTION blower motor will have adequate VA to power 24V UV THERMOSTAT SYSTEMS ARE WIRED NOTE − If electric heat strips are used, the strips common wire SAME AS OVERFLOW MUST be configured on the air handler control through cur- light applications. An additional transform- SWITCH) rent loop. er for UV light applications is required. UV (AHC) board before beginning the discovery" se- 26L56 Currrent sensing relay kit. quence as described in the Installer’s Guide. See HEPA In- light wiring connections are independent icomfort by Lennox terlock Kit for installation of HVAC system operation; see UV light RSBus NOTE: Pass the blower motor L1 wire Furnace or Air Handler details installation instructions for transformer VA through the current loop on the cur- DAS NOTE The discharge air sensor is intended to be requirements and wiring details. rent sensing relay as shown. mounted downstream of the heat exchang- HVAC Heat or Cool call, or the fan is er and air conditioning coil. It must be in continuous operation, the ventila- placed in free airflow, where other accesso- Thermostat wire termination in communicating system Communicating systems using the icomfort Wi-Fi thermostat require four thermostat wires between the thermostat and the tion controller will open OA damper to ries (such as humidifiers, UV lights, etc.) Outdoor Unit Indoor Unit furnace/air handler control and four wires between the outdoor ventilate if the outdoor temperature will not interfere with its accuracy. Wiring Controller icomfort Wi- unit and the furnace/air handler control. When a thermostat and indoor humidity are within the lim- distance between the IFC or AHC and the Fi thermostat cable with more than four wires is used, the extra wires must its of the ventilation controller. discharge air sensor should not exceed 10 Single wire be properly connected to avoid electrical noise. The wires LVCS. Set cycle time to 1 hour; set feet when wired with 18−gauge thermostat Single wire to terminal C must not be left disconnected. to terminal C ventilation time to 60 minutes. wire. Unused wires Use wire nuts to bundle the unused wires at each end of the OAS NOTE The outdoor temperature sensor wiring dis- cable. A single wire should then be connected to the indoor NOTE: Use the icomfort circulate tance between the IFC or AHC should not unit end of the wire bundle and attached to the C" terminals as fan percentage of ON* TIME to control exceed 200 feet when wired with 18−gauge Unused wires shown in the diagram above. ventilation time. thermostat wire. This is not an issue in non−communicating systems.

Figure 5. Wiring Diagrams