Lennox SignatureStat 81M26 Programming And Application Manual
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Also See for SignatureStat 81M26:
- User manual (28 pages) ,
- Quick start installation manual (2 pages)
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E2007 Lennox Industries Inc.
Dallas, Texas, USA
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PROGRAMMING AND
APPLICATION GUIDE
SignatureStatt Thermostat
CONTROLS
505,232M
2
06/07
3
Supersedes 2/07
3
4
4
6
6
8
8
10
11
11
13
16
17
17
NOTE − This thermostat is equipped with automatic compressor protection
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to prevent potential damage due to short cycling or extended power out-
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ages. The short cycle protection provides a 5−minute delay between heat-
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ing or cooling cycles to prevent the compressor from being damaged.
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21
Shipping and Packing List
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1 − SignatureStatt thermostat
25
26
1 − Outdoor temperature sensor
Page 1
Litho U.S.A.
81M26 shown
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Table of Contents
Related Manuals for Lennox SignatureStat 81M26
Summary of Contents for Lennox SignatureStat 81M26
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Page 1: Table Of Contents
PROGRAMMING AND APPLICATION GUIDE E2007 Lennox Industries Inc. Dallas, Texas, USA SignatureStatt Thermostat Table of Contents CONTROLS 505,232M Litho U.S.A. SignatureStatt Thermostat ....... . . -
Page 2: Signaturestatt Thermostat
This document supports the following products: Do not short (jumper) across terminals on the gas valve or at the 81M26 − 1 stage heat / 1 stage cool, conventional or heat pump (When system control to test installation. This will damage the thermostat configured for a single−stage heat pump, no auxiliary backup heat is... -
Page 3: Date Code & Serial Number
Check equipment for shipping damage. If you find any damage, immediate- balance points. ly contact the last carrier. NOTE − Outdoor sensor must use twisted pair wiring (Lennox Cat, No. Date Code & Serial Number 84X49 [1000’] or X3790 [500’]). -
Page 4: Home Screen & Main Menu
Home Screen and Main Menu MAIN MENU MAIN MENU PROGRAM DAY / TIME The home screen displays the present time, indoor temperature, indoor rel- HEAT / COOL ative humidity, and outdoor temperature (if the outdoor sensor is installed). HUMIDIFY USER SETTINGS DEHUMIDIFY INSTALLER SETTINGS To access the main menu screen, press the menu button on the home... - Page 5 Programming for Full Week or Work Week 4. The time for the first event should MON−SUN PROGRAM HEAT COOL The programming process for MON TO SUN, MON TO FRI, and SAT TO be highlighted. Use the UP or WAKE 6:30 AM 70 SUN is identical.
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Page 6: Heating And Cooling Cycles
humidification signal (H terminal) to the humidifier is off when the thermo- Heating and Cooling Cycles stat is in the COOL mode. The H terminal controls humidification. When the thermostat is powered, NOTE − AUTO CHANGEOVER will appear in the HEAT/COOL menu only the H terminal is normally inactive (open circuit) in any mode (HEAT, if enabled via Installer Settings."... - Page 7 MAIN MENU SELECT side of the screen. right. Press DELAY to be reminded lat- LENNOX, INC. HUMIDIFY MENU er or RESET to reset the interval. The 1−800−9LENNOX 5. Use the UP/DOWN button to MODE...
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Page 8: Dew Point Control
HUMIDIFY MENU 4. The HUMIDIFY MENU screen re- Dew Point Control MODE BAS/DP appears, this time with an addi- DEW POINT ADJ tional option, DEW POINT ADJ. NOTE − Dew point control is only available when an outdoor sensor is at- MAIN MENU SELECT tached. - Page 9 Dehumidification Modes 1. From the home screen press MAIN MENU PROGRAM MENU. Use the UP or DOWN In BASIC mode, dehumidification occurs if these conditions are met and HEAT / COOL button to highlight DEHUMIDIFY. signals are present at specific terminals: HUMIDIFY Press SELECT for the DEHU- DEHUMIDIFY...
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Page 10: Humiditrol ® Accessory
® Humiditrol Accessory ® If a Humiditrol accessory is present in the equipment at hand, then the Calculating maximum allowable overcooling in cooling-only SignatureStatt thermostat must be configured to properly operate the Hu- mode START ® miditrol accessory as follows (see Figure 6 for the Humiditrol operation flowchart): Is the Maximum allowable over-... -
Page 11: Changing Time Of Day / Day Of Week
® Other Humiditrol Accessory Notes: Cycling the Fan ® If the outdoor sensor is disconnected while Humiditrol is enabled, thermo- stat will not allow operation in dehumidification mode. MAIN MENU Fan Settings Set point range: 45 to 60% Relative Humidity (RH). Factory default − 50%. DAY / TIME 1. - Page 12 Fan Program 3. Use the UP or DOWN buttons to SELECT PROGRAM DAYS MON TO SUN highlight the days or day you want ⏐ This function allows the user to select whether the indoor blower operates MON TO FRI to program. You can choose ↓...
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Page 13: User Settings And Options
User Settings and Options User settings allow you to personalize your thermostat and change the way SHOW SET TEMP setting Each event has a setpoint temperature, information is displayed on the home screen, and it helps to optimize the and the default is to display the setpoint on the HOME screen. Choose HVAC system to your comfort level. - Page 14 The default is 1.0°F but can be programmed between 0.5° and 3.0°F NOTE − On the 81M28 thermostat, the second−stage operation can be LOCKED OUT using the balance point settings. This second− in 0.5°F increments. See figure 4 for first−stage heating and cooling stage lockout will OVERRIDE the operation shown in figure 5.
- Page 15 5. Heating and cooling limits help USER SETTINGS RESTRICT ALL this disallows any changes to System, Fan, Pro- 2ND STAGE DELAY prevent user−settings to extreme gram, or setpoint. If security is activated, a screen pops up into which COOLING LIMIT 45°F temperatures.
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Page 16: Change Temperature Settings
3. After pressing SET TEMP or after SET AT 78 UNTIL 5:00 PM IMPORTANT 5 seconds, the home screen ºF AUTO FAN INT indicates new setpoint Stress to the homeowner the importance of remembering the Secu- duration. RESUME PROGRAM 27%RH OUTSIDE 95 rity Code if code is forgotten or misplaced, the universal code... -
Page 17: Setting Vacation Mode
Press SET DAY. SYSTEM SETUP Use SYSTEM SETUP HOME SET DAY 81M26 thermostat’s system set- FURNACE 4. The home screen will now indi- SET AT 78 FOR 45 DAYS up screen to choose the system HEAT PUMP cate the VACATION settings. - Page 18 NOTE − In addition to non−heat pump single-stage applications, the met by adjusting the residual cool setting. This is the amount of time 81M26 thermostat supports a single-stage heat pump with NO auxil- that the indoor blower will run after a call for cooling has been satis- iary heat source.
- Page 19 7. ENERGY EFFICIENT RECOVERY With energy efficient recovery From Home screen, press HUMIDITROL enabled, the recovery will start before the programmed time. When MENU, then DEHUMIDIFY, then disabled, the control will start a recovery at the programmed time. The DISABLE MODE, then HUMIDITROL.
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Page 20: Remote Outdoor Sensor
11. SERVICE INT These settings If RUN TIME is chosen, the ser- REMINDER PERIOD SERVICE MONITOR MENU establish criteria for service mes- vice reminder will be set in hours COOL MONITOR RUN TIME sages and alert the homeowner HEAT MONITOR and displayed on the INSTALLER CALENDAR TIME when filters or cooling/heating... -
Page 21: Display Lights
LEFT button at the same time. Hold for 8 seconds. The time Memory Protection of day will display 12:00 indicating a reset has occurred or until LENNOX or the software version is shown on LCD. The thermostat stores all the information concerning its programming NOTE −... -
Page 22: Thermostat−Specific Information
Table 3. 81M26 Terminal Designations Thermostat−Specific Information 24 Vac power input 81M26 1 Stage Heat / 1 Stage Cool, Heat Pump without 24 Vac common Auxiliary Heat, or Non−Heat Pump Energized on call for COOL Table 2. 81M26 LED Indicators... - Page 23 81M27 2 Stage Heat & Cool, Non−Heat Pump Fan ON The indoor blower is ON continuously regardless of whether the heating or cooling equipment is running. Table 4. 81M27 LED Indicators Thermostat Off" Mode In this mode, the heating and cooling and COOL Cooling mode (Y is active) H/D terminals are inactive.
- Page 24 NOTE − High−temperature PEPI disables W2, E and Y1 (in heat mode only) 1. Balance points are used only when the outdoor temperature sensor (46M98) is attached to the unit. when ambient temperature exceeds 95F. 2. When the thermostat is in heat mode and a heat demand exists, if the Table 8.
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Page 25: Flow Diagrams
Fan Auto cost heat pump satisfy the call. Both the compressor and auxiliary heat may In COOLING, the indoor blower cycles with calls for Cooling. not be disabled at the same time by the low and high balance points. In HEAT, and with the thermostat set for standard, the indoor blower (G) cycles with a call for first stage of heating. -
Page 26: Wiring Diagrams
Figure 7 shows a Dual Fuel Flowchart for 81M28 Thermostat. Wiring Diagrams Thermostat wiring connections with various units, including dual fuel, zone control, and applications that include the Humidi- Dual Fuel Flowchart ® trol accessory. See figures 8 and 9. for 81M28 Thermostat Indoor Abbreviations:... - Page 27 Wiring Diagrams Figure 9 SignatureStat t Thermostat Page 27...