TB80 ommercial VisionPO Programmable Thermostat VISIONPO 8000 TOUHSEEN PODUT DT FETUES PPITION The TB80 ommercial VisionPO 8000 Touchscreen Programmable Thermostat is an effortless, seven-day programmable thermostat that provides universal system compatibility, precise comfort control and is easy-to-program. arge, clear display with backlight shows the current and set temperature and time even in the dark. Menu-driven programming make setup effortless. Beautiful ergonomic design is smart and sophisticated to match your customers lifestyle. Touchscreen interaction eal-time clock keeps time during power failures and automatically updates to daylight savings. Saving hanges notification lets you know when the schedule changes have been saved. hange reminders let you know when to replace the batteries. Holiday Override options allow you to override the program schedule, as desired. Speedy same-schedule programming no need to copy multiple days. rmchair programming allows you to remove the thermostat from the wall for programming. The TB80 provides temperature control for gas, oil, electric and heat pumps for up to heat, cool systems. ontents pplication... Specifications... Ordering Information... Installation... 4 Wiring... 5 Installer Setup... Operation... 8 Troubleshooting (Table )... 6-65
SPEIFITIONS Thermostat Description: See Table. Electrical atings: See Table. Temperature: atings: Operating mbient: TB80: 0 F to 0 F (-8 to 49 ). 7089U, 789U: 5% to 95%. Shipping: -0 F to 50 F (-4.4 to 65.6 ). Display ccuracy: ± F (±0.5 ). Setpoint: ange: Heating: 40 F to 90 F (4 to ). ooling: 50 F to 99 F (0 to 7 ). Default Settings: See Table. Humidity atings (H, non-condensing): TB80 VisionPO Thermostats: 5% to 90%. 7089U, 789U: 5% to 95%. Feature Powering methods System types (up to heat/ cool) hangeover System setting Fan setting Table. Thermostat Description. Description Battery only 4 Vac only 4 Vac with battery backup as or electric heat with air conditioning Warm air, hot water, high-efficiency furnaces, and heat pumps Heat only Heat only with fan ool only Manual or uto changeover selectable Heat-Off-ool-uto uto-on Table. Electrical atings Terminal Voltage (50/60 Hz) unning urrent W (Heating) 0-0 Vac 0.0 -.0 (ooling) 0-0 Vac 0.0 -.0 (Fan) 0-0 Vac 0.0-0.60 (Economizer/TOD) 0-0 Vac 0.0 -.0 ODEIN INFOMTION Table. Energy Star Default Program Settings. Schedule Setpoints Fan Period Time Heat ool Setting Occ 8:00am 70 F ( ) 75 F (4 ) On Unocc 0:00pm 55 F (0 ) 85 F (9.5 ) uto Occ Unocc ycle ates (at 50% oad): Heating: Selectable - cycles per hour. ooling: Selectable - 6 cycles per hour. Interstage Differential: Droopless control. Once the first stage is running at 90% load, the thermostat energizes the second stage. ool Indication: Displays ool On when ool is activated. Heat Indication: Displays Heat On when Heat is activated. uxiliary Heat Indication: Displays ux. Heat On when uxiliary Heat is activated. lock ccuracy: ± minute per month. Finish: TB8000: Premier White color. 789U Wall Mount emote Indoor Sensor: Premier White color. T7770 Wall Mount emote Indoor Sensor: Premier White color. Batteries: Three replaceable alkaline batteries: Power thermostat when 4 Vac common is not used. Non-replaceable lithium battery with ten-year life: Under normal conditions holds calendar and time settings. lkaline batteries keep calendar and time if lithium battery is no longer functional. esistance haracteristics of emote Sensors: 7089U Outdoor Sensor: 0K ohm NT. 789U emote Indoor Sensor: 0K ohm NT. 777 Flush-Mount emote Indoor Sensor: 0K ohm NT. T7770006 Wall-Mount emote Indoor Sensor: 0K ohm NT. T777000 Wall-Mount emote Indoor Sensor: 0K ohm NT. When purchasing replacement and modernization products from your TDEINE wholesaler or distributor, refer to the TDEINE atalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:. our local Honeywell utomation and ontrol Products Sales Office (check white pages of your phone directory).. Honeywell ustomer are 885 Douglas Drive North Minneapolis, Minnesota 554-486 In anada Honeywell imited/honeywell imitée, 5 Dynamic Drive, Scarborough, Ontario MV 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in ustralia, anada, Finland, France, ermany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.. 6-65
alibration (TB80, 7089U, 789U, T7770): No field calibration required. Mounting Means: TB80: Direct wall-mount using mounting screws and anchors provided. Fits standard vertical or horizontal in. x 4 in. junction box. 7089U: Mounts outside of living space with mounting clip and screws provided. 789U, T7770: Mounts directly on the wall using mounting screws and anchors provided. Fits a vertical x 4 in. junction box. 5-/ (40) -5/6 (84) 7-7/8 (00) -5/6 (84) over Plate: 00796-00 over Plate is used to cover marks left on the wall by the old thermostat. Dimensions: TB80 Touchscreen Thermostat: See Fig.. 7089U Outdoor Sensor Mounting lip: See Fig.. 789U emote Indoor Sensor: see Fig. 5. T7770: See Fig. 4. 00796-00 over Plate: See Fig.. Fig.. 00796-00 over Plate dimensions in in. (mm). -/ (8) M9 WPTE -/8 (86) -/8 (86) M4488 Fig.. 7089U Outdoor Sensor Mounting lip dimensions in in. (mm). THEMOSTT 6 (5) THEMOSTT ND WPTE -/8 (5) KNOKOUTS FO EUOPEN PPITIONS 4-9/6 (6) -/8 (60) STNDD UTIIT ONDUIT BOX ( X 4) MOUNTIN HOES 5-/6 (8) M4 Fig.. TB80 Touchscreen Thermostat dimensions in in. (mm). -/8 (60) -/6 (80) 5/6 () M96 Fig. 4. T7770 dimensions in in. (mm). 6-65
ES NO 4-5/8 (7) NO NO 5 FEET [.5 METES] M4465 -/4 (70) FONT VIEW Fig. 5. 789U Indoor Sensor dimensions in in. (mm). MEU NOTIE If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Dispose of properly. ontact your local waste management authority for instructions regarding recycling and the proper disposal of an old control. INSTTION -/8 (9) SIDE VIEW When Installing this Product.... ead these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. heck ratings given in instructions and on the product to ensure the product is suitable for your application.. Installer must be a trained, experienced service technician. 4. fter installation is complete, check out product operation as provided in these instructions. UTION Electrical Shock or Equipment Damage Hazard. an shock individuals or short equipment circuitry. Disconnect power supply before installation. Select Thermostat ocation Select a location for the thermostat about 5 ft (.5m) above the floor in an area with good air circulation at average temperature. See Fig. 6. Fig. 6. Select thermostat location. Do not install the thermostat where it can be affected by: Drafts or dead spots behind doors and in corners. Hot or cold air from ducts. adiant heat from sun or appliances. oncealed pipes and chimneys. Unheated (uncooled) areas such as an outside wall behind the thermostat. Separate Wallplate from Thermostat. Separate the wallplate from the thermostat. See Fig. 7. WPTE WIE HOE THEMOSTT M67 Fig. 7. Separate wallplate from thermostat. M58 Install Wallplate (See Fig. 8) Mount the thermostat horizontally on the wall:. Pull the wires through the wire hole on the wallplate.. Position the wallplate on the wall with the arrow pointing up. evel the wallplate for appearance only.. Use a pencil to mark the mounting holes. 4. emove the wallplate from the wall and drill two /6 in. holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/ in. holes. Tap the wall anchors (provided) into the drilled holes until flush with the wall. 5. Pull the wires through the wire hole on the wallplate and position the wallplate over the wall anchors. 6. Insert the mounting screws into the wall anchors and tighten. 6-65 4
W. Insert the wires into the terminal block and tighten each screw terminal. See Fig. 0. WIES THOUH W ND WIE SOT W NHOS () MOUNTIN HOES MOUNTIN SEWS () M996 M997 Fig. 0. Insert wires into terminal block. 4. Push excess wire back into the wall opening and restrict wires to the shaded area. See Fig.. 5. Plug the wall opening with nonflammable insulation to prevent drafts from affecting the thermostat. Fig. 8. Install wallplate. WIE WPTE WIIN UTION Electrical Shock Hazard. an cause electrical shock or equipment damage. Disconnect power supply before connecting wiring. IMPOTNT ll wiring must agree with applicable codes, ordinances and regulations. Use 8 gauge thermostat wire. Shielded cable is not required. NOTES: efer to Table 5 for terminal designation descriptions. See Fig. through for wiring diagrams for specific equipment applications.. Select set of terminal identifications that correspond to your system type (conventional or heat pump). See Fig. 9. W W HET PUMP ONVENTION W SEW TEMINS O/B M780 Fig. 9. Terminal identifications for system type.. oosen screw terminals used for the application. W OPENIN SHDED E Fig.. estrict wires to shaded area of wire hole. Table 4. Wiring Diagrams. M66 System Type Wallplate Terminal Identifications Wiring Diagram Figure Standard Heat/ool onventional, Heat Only onventional 4 Heat Only with Fan onventional 5 ool only onventional 6 Standard Multistage onventional 7, 8 up to Heat/ ool Heat Pump Heat Pump 9, 0 (No uxiliary Heat) Heat Pump Heat Pump, (with uxiliary Heat) Multiple T7770 7, 8, 9 Sensors Multiple 789U Sensors 0 5 6-65
Terminal Designation c (see Note ) (see Note ) (see Note ) W W O/B (see Note ) (see Note 4) Table 5. Terminal Designation Descriptions. Description Power for cooling connect to secondary side of cooling system transformer. Power for heating connect to secondary side of heating system transformer. ompressor output. ommon wire from secondary side of cooling system transformer. Heat relay. Fan relay. Second stage heat relay. Second stage cooling. hangeover valve for heat pumps. Economizer/Time-Of-Day (TOD) output powered via terminal. Optional outdoor or indoor remote sensor. (See Note 5) Optional outdoor or indoor remote sensor. (See Note 5) Powers red ED behind plastic in upper right corner of the thermostat. NOTES:. When used in a single-transformer system, leave metal jumper wire in place between c and. If used on a two-transformer system, remove metal jumper wire between c and.. ommon wire is optional when thermostat is used with batteries. When using separate transformers for heating and cooling, the common must come from the cooling transformer.. If thermostat is configured for a heat pump in the Installer Setup, configure changeover valve for cool (O-factory setting) or heat (B). 4. eference economizer literature for wiring details. When set for economizer operation, the terminal provides the occupancy signal. (Power indicates occupied.) 5. Sensor wires must have a cable separate from the thermostat control cable. Terminal Wiring Details for Economizers Wire the terminal to the W7 N terminal, or the W7459 T terminal. When using dual transformers at the thermostat, the heating transformer must power the economizer. The signal is powered from the terminal and energizes the economizer to signal occupied status and drive the damper to the set minimum position. onventional System Wiring W W 4 V W W 4 V OUTDOO/INDOO TEMPETUE SENSO EONOMIZE FN E OMPESSO ONTTO HET E POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. M78 Fig.. Typical wiring of single transformer H/ system. OUTDOO/INDOO TEMPETUE SENSO EONOMIZE FN E OMPESSO ONTTO HET E POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. EMOVE FTO INSTED JUMPE. 4 V WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. WHEN USED, THE OMMON MUST ONNET TO THE OOIN TNSFOME SEOND. M78 Fig.. Typical hookup of dual transformer H/ system. 6-65 6
OUTDOO/INDOO TEMPETUE SENSO W W HET E POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. EONOMIZE WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. M78 Fig. 4. Typical hookup of heat-only system. 4 V OUTDOO/INDOO TEMPETUE SENSO W HET E EONOMIZE W FN E POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. OO E WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. Fig. 7. Typical hookup of single transformer multistage system (up to H/). OO E HET E 4 V M786 OUTDOO/INDOO TEMPETUE SENSO W W FN E HET E EONOMIZE POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. M784 Fig. 5. Typical hookup of heat-only system with fan. 4 V OUTDOO/INDOO TEMPETUE SENSO W HET E EONOMIZE W FN E POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. EMOVE FTO INSTED JUMPE. OO E OO E HET E 4 V 4 V W W 4 V WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. WHEN USED, THE OMMON MUST ONNET TO THE OOIN TNSFOME SEOND. M787 Fig. 8. Typical hookup of dual transformer multistage system (up to H/). OUTDOO/INDOO TEMPETUE SENSO FN E OMPESSO ONTTO EONOMIZE POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. M785 Fig. 6. Typical hookup of cool-only system. 7 6-65
Heat Pump System Wiring W O/B 4 4 V W O/B 4 4 V OUTDOO/INDOO TEMPETUE 5 SENSO EONOMIZE OMPESSO ONTTO HNEOVE VVE FN E OUTDOO/INDOO TEMPETUE 5 SENSO UXII HET E FN E OMPESSO ONTTO HNEOVE VVE EONOMIZE POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. FTO INSTED JUMPE. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. 4 "O/B" TEMIN SET TO ONTO S EITHE "O" O "B" IN THE INSTE SETUP. 4 "O/B" TEMIN SET TO ONTO S EITHE "O" O "B" IN THE INSTE SETUP. 5 OPTION OUTDOO O INDOO EMOTE SENSO. WIES MUST HVE BE SEPTE FOM THE THEMOSTT BE. M788B 5 OPTION OUTDOO O INDOO EMOTE SENSO. WIES MUST HVE BE SEPTE FOM THE THEMOSTT BE. M790B Fig. 9. Typical hookup of single-stage heat pump with no auxiliary heat (H/). Fig.. Typical hookup of single-stage heat pump with auxiliary heat (H/). W O/B 4 4 V W O/B 4 4 V OUTDOO/INDOO TEMPETUE 5 SENSO EONOMIZE OMPESSO HNEOVE VVE FN E OMPESSO OUTDOO/INDOO TEMPETUE 5 SENSO UXII HET E EONOMIZE FN E OMPESSO HNEOVE VVE OMPESSO POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. POWE SUPP. POVIDE DISONNET MENS ND OVEOD POTETION S EQUIED. FTO INSTED JUMPE. FTO INSTED JUMPE. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. WHEN USIN BTTEIES, THE 4V OMMON ONNETION IS OPTION. 4 "O/B" TEMIN SET TO ONTO S EITHE "O" O "B" IN THE INSTE SETUP. 4 "O/B" TEMIN SET TO ONTO S EITHE "O" O "B" IN THE INSTE SETUP. 5 OPTION OUTDOO O INDOO EMOTE SENSO. WIES MUST HVE BE SEPTE FOM THE THEMOSTT BE. M789B Fig. 0. Typical hookup of multistage heat pump with no auxiliary heat (H/). 5 OPTION OUTDOO O INDOO EMOTE SENSO. WIES MUST HVE BE SEPTE FOM THE THEMOSTT BE. M79B Fig.. Typical hookup of multistage heat pump with auxiliary heat (H/). 6-65 8
POWE THE THEMOSTT ou can choose from three methods to power the thermostat: Batteries only ( alkaline). 4 Vac direct connection only. 4 Vac direct connection with battery backup ( alkaline). Wiring 4 Vac ommon Single-Transformer System onnect the common side of the transformer to the screw terminal of the thermostat wallplate. eave the metal jumper wire in place between c and. Two-Transformer System onnect the common side of the cooling transformer to the screw terminal of the thermostat wallplate. emove the metal jumper wire between c and. Installing Batteries. Install three alkaline batteries on the back of the thermostat as marked. See Fig.. ocate and Mount 7089U Outdoor Temperature Sensor (Optional) Mount the sensor where (see Fig. 5): cannot tamper with settings. there is good air circulation. it can measure true outdoor ambient temperature. surface is flat. wire distance between 7089U and thermostat is less than 00 feet. Do not mount the sensor: in direct sunlight. where hot or cold air blows on the sensor. Discharge line from an outdoor compressor unit, vent or fan causes inaccurate temperature readings. where snow, ice or debris can cover it. Use the following steps to mount the sensor:. emove the sensor from the mounting clip.. Mark the area on the location selected for mounting the sensor mounting clip.. Mount the clip. BTTEIES () M998 Fig.. Installing batteries.. ocate and remove tab labeled emove. See Fig. 4. IMPOTNT This tab must be removed in order to set the real-time clock. EMOVE TB EMOVE DUIN INSTTION Fig. 5. Typical locations for 7089U Outdoor Sensor. Wire 7089U Outdoor Sensor M754 EMOVE DUIN INSTTION M990 Fig. 4. emove tab labeled EMOVE from thermostat back. UTION Electrical Interference (Noise) Hazard. an cause erratic system operation. Keep wiring at least one foot away from large inductive loads such as motors, line starters, lighting ballasts and large power distribution panels. Use shielded cable to reduce interference when rerouting is not possible. 9 6-65
. Wire 7089U Outdoor Sensor to and terminals on the thermostat. If leadwire provided is not long enough (60 in.), run a cable to a hole at 7089U location. a. Using color-coded, 8-gauge thermostat wire is recommended. For example of general wiring of 7089U, see Fig. 6.. Mount 7089U in its mounting clip.. Plug wiring hole using nonhardening caulk or putty. onsider the following as well:. Be sure wire distance between sensor and thermostat is less than 00 feet.. Mark the area on the wall selected for mounting the sensor or junction box.. Sensor wire must be separate from the thermostat cable. 4. un wire cable to a hole at the selected wall location. 5. Pull approximately three inches of wire through the opening. 7089 WIIN HOE THOUH STUTUE Wire Indoor Sensor olor-coded, 8-gauge wire is recommended. UTION Electrical Interference (Noise) Hazard. an cause erratic system operation. Keep wiring at least one foot away from large inductive loads such as motors, line starters, lighting ballasts and large power distribution panels. USE PPOPITE MOUNTIN MENS FO THE TPE OF STUTUE. PU WIIN HOE WITH NON-HDENIN UK O PUTT. M9970 Fig. 6. Wire 7089U Outdoor Sensor to the thermostat. ocate and Mount T7770 or 789U emote Indoor Temperature Sensor (Optional) ocate and mount the sensor in the same fashion as the thermostat. See the Select Thermostat ocation section.. heck Installer Setup Number (ISU) 40 to ensure it is set to the desired value. (See Table 6.). Wire sensor to and thermostat terminals.. Push excess wire back into the hole. Plug the hole using nonhardening caulk, putty or insulation to prevent drafts from affecting performance. 4. emove sensor cover. 5. Mount sensor to the wall or junction box using the screws and anchors provided. 6. evel the sensor for appearance only. Device functions correctly even when not level. 7. Install sensor cover. Sensor Wiring for Temperature veraging SUBBSE SUBBSE T7770 T7770 T T T T T4 T T4 T T7770 T T T7770 T T T777000 T777000 THE T777000 IS 0K OHM SENSO. M9 M8 Fig. 8. Wiring two T777000 (0K ohm) Sensors to provide a temperature averaging network. Fig. 7. Wiring four T7770006 (0K ohm) Sensors. 6-65 0
T7770006 SUBBSE T T T4 T W 789 789 T777000 T7770006 789 789 T T WIES MUST HVE BE SEPTE FOM THE THEMOSTT BE. M95 THE T777000 IS 0K OHM SENSO. M94 Fig. 9. Wiring two T7770006 (0K ohm) Sensors and one T777000 (0K ohm) sensor to provide a temperature averaging network Fig. 0. Wiring four 789U (0K ohm) Sensors to provide a temperature averaging network. SET END ND TIME This thermostat is designed to, under normal use, automatically keep current time and day in memory for up to ten years once the calendar is set. There are two ways to set the calendar for this thermostat: Setting alendar Once Functioning See steps through 4, in the dvanced Settings section, to set year, month and day. Setting alendar When First Powered When first powered, the thermostat proceeds through a sequence of screens to set the calendar. When first powered, the thermostat proceeds through a sequence of screens to set the calendar. See Fig.. SET UENT D SET MONTH MON TUE WED THU FI S SUN MON WED THU FI S SUN OK TO PIK MUTIPE DS SEEN OKED HNE FITE UV MP HUMIDIFIE PD OK TO PIK MUTIPE DS SEEN OKED HNE FITE UV MP HUMIDIFIE PD PM DONE DONE USE OWS TO SET E ND TIME M76 Fig.. Setting calendar and time when thermostat is first powered. 6-65
INSTE SETUP dvanced Settings The thermostat has advanced settings to match the HV system. These settings can be adjusted to match specific needs. There are two different groups of settings: complete set designed for the installation use. simple set to limit accessibility for typical users. Installer Settings (omplete Set) ccess to the installer settings is obtained as follows:. From the main screen, press SSTEM. Five blank touch keys show on the bottom of the screen between DONE and NE.. Press and hold the two blank keys on either side of the center blank key for approximately five seconds. (See Fig..). The Setup Number displays to the lower-left area of the screen. It is a four-digit code beginning with zero. The current setting is displayed to the right. To cycle through the Setup Numbers, press the up or down arrow. User Settings (Simple Set) ccess to the user settings is obtained as follows:. From the main screen, press SSTEM. Five blank touch keys show on the bottom of the screen between DONE and NE.. Press and hold the center blank key approximately five seconds.. The Setup Number displays to the lower-left area of the screen. It is a four-digit code beginning with zero. The current setting is displayed to the right. To cycle through the Setup Numbers, press the up or down arrow. TUE MO TU WE TH F S SU HNE FITE UV MP Inside Inside Set To SSTE M EM HET Following Schedule SSTEM OFF OO PM Following Schedule OFF DONE NE DONE N M766 Fig.. Entering User Setup. M99 Fig.. Entering Installer Setup. 6-65
INSTE SETUP NUMBES (ISU), SETTINS, ND TESTS (TBE 6) Use the Installer System Test to test the heating, cooling and fan. efer to the latter portion of Table 6. UTION Equipment Damage Hazard. Minimum compressor off time is bypassed during Installer System Test void cycling compressor quickly. IMPOTNT Use Installer System Test to test heating, cooling and fan. The setting chosen for System Type (ISU 070) can prevent some System Test Numbers from appearing. Unless otherwise noted, setup items are accessible through only the Installer setup and not the User setup. Installer Setup Number Installer Setup Name Table 6. Installer Setup Menu. Default Setting ll Settings Notes 00 a Date (ear Upper) 0 0 0xx vailable year range: 00-78 xx 00 a Date (ear ower) 04 00-99 vailable year range: 00-78 040 a Date (Month) 6-050 a Date (Day) 5 - (Month Dependent) 060 a Schedule Options 4 0 Non-Programmable 4 Programmable 070 System Selection 8 H/ onv H/ HP H w/o fan 4 H with fan 6 7 H/ HP 8 H/ onv 9 H/ onv 0 H/ onv H/ HP H/ HP 075 TOD/Economizer output 0 0 Unused TOD Economizer 080 Heat Fan Operation 0 0 Fossil Electric 085 Pre-occupancy Purge Duration 0 0 no duration one hour two hours three hours 090 eversing Valve O/B 0 0 O (O/B On ool) B (O/B On Heat) 00 ycles Per Hour (PH) for first stage compressor 00 PH for second stage compressor 040 PH for first stage conventional heat 050 PH for second stage conventional heat Economizer energizes during a call for cool. TOD energizes during Occupied period, and deenergizes during Unoccupied. Only shown for conventional system with heat stages and fan capability selected. If heat pump is selected, fan defaults to electric. Shown only if system has fan and schedule programmable. Pre-occupancy purge enabled by nonzero duration (and sends economizer to minimum position). Only shown with heat pump system selected. -6 Only shown for system with cool stages. Selection in this stage changes default PH of second stage cool. -6 Only shown if two stages of cool selected. 5 - Only shown if system is conventional with heat stages. Selection in this stage changes default PH of second stage heat. 5 - Only shown with at least two stages conventional heat or H/ heat pump selected. a Setting available for modification in both the Installer and User setup modes. 6-65
Installer Setup Number Installer Setup Name 060 PH for third Stage Heat 070 PH for uxiliary Heat 080 ontinuous Backlight 9 - Only shown if H/ heat pump is selected. 9 - Only shown if multi-stage heat pump is selected (heat pump with more heat than cool stages). 0 0 No es 000 hangeover 0 Manual uto 00 Deadband F ( ) 00 a Temperature Indication Scale 0 0 F (.5) F (.5 ) (.0) F (.0 ) 4 (.5) 4 F (.5 ) 5 (.0) 5 F (.0 ) 6 (.5) 6 F (.5 ) 7 (4.0) 7 F (4.0 ) 8 (4.5) 8 F (4.5 ) 9 (5.0) 9 F (5.0 ) 00 a Daylight Saving 0 Disabled Enabled (US) 040 emote Temperature Sensor 050 Heat Pump ompressor ockout 060 Heat Pump uxiliary ockout 055 Temporary Occupied Duration imit 0 0 None Outdoor for Display Outdoor for ontrol emote 0K Indoor 4 emote 0K Indoor 0 0 None 5(-9.5) 5 F(-9.5 ) 0(-6.5) 0 F(-6.5 ) 5(-4.0) 5 F(-4.0 ) 0(-.0) 0 F(-.0 ) 5(.5) 5 F(.5 ) 40(4.5) 40 F(4.5 ) 45(7.0) 45 F(7.0 ) 0 0 None 40(4.5) 40 F(4.5 ) 45(7.0) 45 F(7.0 ) 50(0.0) 50 F(0.0 ) 55(.0) 55 F(.0 ) 60(5.5) 60 F(5.5 ) 0 no duration one hour two hours three hours 4 four hours 0540 a Number of Periods 4 Periods 4 4 Periods 0580 Minimum ompressor Off Time Table 6. Installer Setup Menu. (ontinued) Default Setting ll Settings Notes 5 0 Off minutes minutes 4 4 minutes 5 5 minutes lways shown. If power not present the option is overridden and normal backlight operation occurs. Only shown if system has both heat and cool stages. Only shown if utomatic hangeover Selected veraging would not include on-board sensor. It is accomplished by series/parallel combinations. applies only to Heat Pump applications (allowing compressor lockout while displaying temperature). Only shown for heat pump systems with more heat stages than cool selected and remote sensor selection is outdoor for control. Must enforce a dead band between this and uxiliary ockout Only shown for heat pump systems with more heat stages than cool selected and remote sensor selection is outdoor for control. Must enforce a dead band between this and Heat Pump ompressor ockout. 0 means no limit Does not appear if Non-programmable is chosen. pplies to all days of the week. With selected the ancel Period option does not appear on the display. Only shown if system has cool stages. 0600 Heat Temperature 90 40 to 90 F (4 to ) Only shown if system has heat stages. ange Stops 060 ool Temperature ange Stops 50 50 to 99 F (0 to 7 ) Only shown if system has cool stages. a Setting available for modification in both the Installer and User setup modes. 6-65 4
Installer Setup Number 0640 a lock Format Hour 4 4 Hour 0650 Extended Fan On time Heat 0660 Extended Fan On time ool 0 0 Off 90 90 seconds 0 0 Off 40 40 seconds 0670 Keypad ockout 0 0 Unlocked Partial ockout Partial ockout Fully ocked 0680 Temperature ontrol Heat 0685 ecovery Heat amp ate 0690 Temperature ontrol ool 0695 ecovery ool amp ate 0700 Temperature Display Offset 070 estore Factory Defaults ess ggressive Standard More ggressive Not displayed with fan set to fossil or with cool-only systems Only shown if system has cool stages. Unlocked: ll functions accessible. Partial : ocks all but Holiday, Override, and Up/Down. Partial : ocks all but Holiday and Override. Full: Entire interface locked/non-functional. Only shown if system has heat stages. Only integral gains affected. ffects control operation in all control regimes (not just recovery or setpoint change). More ggressive stops signal prior to reaching the setpoint. (For use with oversized equipment.) 5 0-0 F/hour Only shown if system has heat stages. 0 disables ramped recovery (step setpoint change at period start time) ess ggressive Standard More ggressive Only shown if system has cool stages. Only integral gains affected. ffects control operation in all control regimes (not just recovery or setpoint change). More ggressive stops signal prior to reaching the setpoint. (For use with oversized equipment.) 0-0 F/hour Only shown if system has cool stages. 0 disables ramped recovery (step setpoint change at period start time) 0 - (-.5) - F (-.5 ) - (-.0) - F (-.0 ) - (-0.5) - F (-0.5 ) 0 (0.0) 0 F (0.0 ) (0.5) F (0.5 ) (.0) F (.0 ) (.5) F (.5 ) 0 0 No es INSTE SSTEM TEST ITEMS Test Installer Test ool 0 0 Off ool Stage ool Stage Test Test Test 4 Test 8 Installer Setup Name Installer Test Fan Installer Test Heat Installer Test uxiliary Heat Installer Test TOD/Economizer Table 6. Installer Setup Menu. (ontinued) Default Setting ll Settings Notes 0 0 Off Fan On 0 0 Off Heat Stage Heat Stage and Heat Stage, and 0 0 uxiliary Heat Off uxiliary Heat On 0 0 TOD/Economizer Off TOD/Economizer On a Setting available for modification in both the Installer and User setup modes. This offset applies to both the control temperature and to the display temperature for indoor sensor (and remote indoor sensor) esets all Installer Setup parameters to default values and resets the schedule to default Energy Star. etains only calendar settings and time. Press the Done button to exit the Installer System Test. 5 6-65
MIN SEEN FN SEETS ON/UTO SSTEM SEETS EM. HET/HET/OFF/ OO/UTO FN UTO SSTEM HET TUE Inside Following Schedule UP OW ISES TEMPETUE SETTIN DOWN OW OWES TEMPETUE SETTIN M SHEDUE ENTES SHEDUIN MODE HOID HNES TEMPETUE SETTIN FO DESINTED NUMBE OF DS SHEDUE HOID OK SEEN OVEIDE Fig. 4. Main screen selections. OVEIDE SET TEMPO OVEIDE SEEN OKS OUT THE SEEN TO OW FO ENIN OK SETS THE TIME FOWD O BK M748 TUE SHOWS UENT D OF THE WEEK FN SHOWS FN SETTIN SSTEM SHOWS UENT SSTEM POSITION TIME DISP UENT TIME OF D, HOD TIME EMININ O NUMBE OF HOID DS EMININ FN UTO SSTEM HET Inside TUE Occupied M INSIDE TEMPETUE SHOWS THE UENT INSIDE TEMPETUE SET TO TEMPETUE SHOWS THE UENT SET TEMPETUE Following Schedule SHEDUE HOID OK SEEN OVEIDE FOOWIN SHEDUE SHOWS THE THEMOSTT IS FOOWIN THE POMMED SHEDUE M749 Fig. 5. Main screen display. POMMIN Table 7 shows default program settings. Table 7. Energy Star Default Program Settings. Schedule Setpoints Fan Period Time Heat ool Setting Occ 8:00am 70 F ( ) 75 F (4 ) On Unocc 0:00pm 55 F (0 ) 85 F (9.5 ) uto Occ Unocc Fan Settings uto: Fan runs only when heating/cooling system is on. See the Fan Schedule section for more information. On: Fan runs continuously. 6-65 6 System Settings Heat: Thermostat controls the heating system. Off: Both heating and cooling systems are off. ool: Thermostat controls the cooling system. uto: Thermostat automatically changes between heat and cool operation, depending on indoor temperature. Programming Heating and ooling Schedule The thermostat can control up to four different schedule periods per day: O : Work arrival time. Period to keep space at a comfortable temperature. UNO: Work exit time. Period to keep space at an energy-saving temperature. O : Second occupied period. UNO: Second unoccupied period. vailable schedule times are at 5-minute intervals.
Editing Schedule. Press SHEDUE.. Press EDIT. NOTES: The first time a change is made, the screen appears mostly blank. (See Fig. 6.) Multiple days can be selected. MON TUE WED THU FI ST SUN OK TO PIK MUTIPE DS 9. When complete, press DONE. SVIN HNES appears on the screen to indicate changes are being saved to the day(s) modified. To schedule the remaining days of the week, repeat steps -9. 0. To exit schedule without saving changes, press NE any time. ancelling a Schedule Period To accommodate special needs, a period can be cancelled. EXMPE: space is always unoccupied during the weekend. ancel all Saturday and Sunday (occupied and unoccupied) periods. The thermostat then controls to the final Friday UNNO temperature until Monday O period. Fig. 6. Initial schedule edit screen.. Select any combination of days to edit. heckmarks appear next to selected days. These are scheduled with identical times and temperatures. 4. Press O. Once pressed, O flashes to show it is selected. 5. Press Up and Down to modify time and temperatures from this screen. (See Fig. 7.) NE M9954 Fan settings for the selected period can be programmed for ON or UTO. See Fan Schedule section for more information.. Press SHEDUE.. Press EDIT.. Select the Day(s) of the week desired. 4. Press the schedule period to cancel (O, UNO, O or UNO). Once selected, the period flashes. 5. Press NE PEIOD. 6. The time, temperature(s) and fan setting disappear. The bar above the selected period is removed, indicating the scheduled period was cancelled. (See Fig. 8.) To reinstate a schedule period, press an arrow to set desired time and temperatures. 7. Press DONE. FN MON TUE WED THU FI ST SUN OK TO PIK MUTIPE DS HET MON TUE WED THU FI ST SUN OK TO PIK MUTIPE DS FN ON UTO NE PEIOD DONE O UNO O UNO NE Fig. 7. Screen to edit existing settings. 6. Press UNO and repeat step 5. 7. Press O and repeat step 5. 8. Press UNO and repeat step 5. M HET OO M750 DONE O UNO O UNO NE Fig. 8. Screen displayed when a period is cancelled. Setting Time. Press OK.. Use arrows to set current time.. Press DONE. OO M75 IMPOTNT The current day of the week should already be set correctly. If not, see the dvanced Settings section to set the day. 7 6-65
OPETION Setting Temperature Overrides There are three temperature override options: Hold Temperature Until Override, and Holiday. HOD TEMPETUE UNTI Holds the temperature temporarily until the time set by the user, or the next scheduled period time.. Press the Up or Down arrow next to the temperature to adjust. The Hold Temperature Until time appears on the screen. The time defaults to the next scheduled period start time. Time Up and Down arrows are shown for approximately seven seconds. Pressing the screen time (where the Hold Temperature Until time displays) causes arrows to reappear.. Press Up or Down arrow next to the hold time to set desired time for the thermostat to resume schedule. The installer setup can limit the length of time for an override to,,, or 4 hours beyond the current time.. Press NE or SHEDUE to cancel Hold Temperature Until and resume the schedule. Once the Hold Temperature Until time is reached, the thermostat displays Following Schedule to indicate that the Hold (Override) has ended. OVEIDE hanges temperature setting until the next period takes effect. For use during Unoccupied periods.. Press OVEIDE. The settings change by default to the next Occupied period. hanges are limited to those allowed by the lockout level.. Press Up or Down arrow to change the override time and temperature. HOID hanges temperature setting for a designated number of days. Press HOID. The screen shows Hold Temperature Until DS.. Press Up or Down arrow to change the number of days desired for the thermostat to override the schedule.. Press the Up or Down arrow to change the desired temperature for the duration of the holiday. When the number of Holiday Override days expires, the screen shows Following Schedule to indicate that the Holiday Override has ended. Fan Schedule Press FN while in the SHEDUE screen to program the system fan. hoices available from the SHEDUE screen: UTO (default position): Fan runs with equipment. Programmable for all SHEDUE periods: O, UNO, O, and UNO. ON: Fan runs continuously. Programmable for all SHEDUE periods). Fan Status Displayed on Main Screen If the fan program is scheduled, the scheduled mode (UTO or ON) appears. When the thermostat is running the fan, the fan blade symbol appears next to FN to indicate the thermostat has the fan on. If the thermostat is not controlling the fan typical for many gas, forced-air heating systems the fan blade symbol will not appear even though the fan may be running. Manual Override of Fan Schedule UTO fan is automatically following the FN schedule (choices are UTO and ON). ON overrides FN schedule. The fan is continuously on. eplacing Batteries Not all thermostat models require batteries. If the thermostat has batteries, a low battery warning (see fig) flashes on the main screen for approximately 0 days. NOTES: If batteries are not replaced when the ow Battery warning is flashing, the O batt screen displays continuously and the thermostat stops operating until batteries are replaced. The thermostat has a low battery indicator. However, it is recommended that the batteries be replaced once each year. Do this to prevent leakage and prevent the thermostat and HV system from shutting down due to lack of thermostat battery power. The DS Up and Down arrows appear for approximately seven seconds. Pressing the screen just below Hold Temperature Until allows the DS Up and Down arrows to reappear.. To cancel the Holiday Override early, press NE. M755 Fig. 9. ow battery signal. 6-65 8
eplace the batteries as follows:. emove the thermostat from the base by pulling it straight out. (See Table 40.). Install three new alkaline batteries with proper polarization. NOTES: lways use alkaline batteries. ll programming (Schedule, Date and Time) information is retained during battery replacement.. Place thermostat back on subbase by aligning terminal screw blocks with the pins on the back of the thermostat. (See Table 4.) 4. Push the thermostat straight onto the base. W leaning Thermostat Screen The thermostat has a touch screen interface. Follow these steps to clean the screen without making thermostat changes:. Press SEEN. Thermostat locks out the keypad for 0 seconds to allow for cleaning. IMPOTNT Do not spray any liquid directly on the screen. If using household glass cleaner, spray cleaner on cloth. Then use the cloth wipe the screen clean.. Use damp cloth slightly moistened with water or household glass cleaner to clean the screen.. epeat above steps, as necessary. 4. Press DONE to return to the main screen and normal operation. If no button is pressed for two minutes, the device automatically returns to the main screen. eading emote Indoor Temperature If connected to an installed remote indoor temperature sensor, the thermostat displays the indoor temperature from the remote sensor(s). If connected to an installed remote indoor temperature sensor, the thermostat internal sensor is not used. EMOVE DUIN INSTTION M999 ONE EMOTE INDOO SENSO INSTED If one remote indoor temperature sensor is used, the screen showing the Inside temperature reading displays the temperature at the indoor remote sensor location. MUTIPE EMOTE INDOO SENSOS INSTED If more than one remote indoor sensor is used, the screen showing the Inside temperature reading displays the average of all the remote indoor sensors. Fig. 40. emoving thermostat from subbase. WPTE PINS ON BK OF THEMOSTT eading Outdoor Temperature If connected to an outdoor sensor, the thermostat displays the Outside temperature. VIEW OUTSIDE TEMPETUE The Outside temperature is located in the lower right corner of the main screen. If it is not on the main screen, view the outdoor temperature by pressing MOE until the outside temperature shows. TEMIN SEW BOK M Fig. 4. Placing thermostat back onto subbase. 9 6-65
Screen ocked Portions of the touch screen interface can be fully or partially locked. See the dvanced Settings section for information to use these features. When the thermostat displays SEEN OKED, the touch screen interface is either fully or partially locked. Fully ocked Screen In this mode, the entire interface is locked and not functional. To unlock screen, see the dvanced Settings section. The screen continuously displays SEEN OKED. Partially ocked Screen When partially locked: Pressing a locked key prompts the screen to indicate SEEN OKED for five to seven seconds. Pressing an unlocked key with SEEN OKED active removes SEEN OKED from the display. PTI OKOUT This mode locks all keys except HOID, OVEIDE, and temperature Up/Down arrows: User can change the temperature setpoint, but cannot change schedule settings. The temporary temperature change lasts until next scheduled period. The screen displays that time. User can change the temperature setpoint, but cannot change schedule settings. Pressing HOID sets the temperature to the Unoccupied setting for the selected period of time. The next Occupied period switches back to the program settings. Pressing OVEIDE sets the temperature to the Occupied setting for the selected period of time. The next Unoccupied period switches back to the program settings. To cancel the temperature override and follow the programmed schedule, press NE. To unlock the screen, see dvanced Settings section. PTI OKOUT This mode locks all keys except HOID and OVEIDE: Pressing HOID sets the temperature to the Unoccupied setting for the selected period of time. The next Occupied period switches back to the program settings. Pressing OVEIDE sets the temperature to the Occupied setting for the selected period of time. The next Unoccupied period switches back to the program settings. To cancel the temperature override and follow the programmed schedule, press NE. To unlock the screen, see dvanced Settings section. Temperature ecovery The thermostat is equipped with a feature to eliminate guesswork when setting a schedule. That is, the user need not know the amount of time for the HV system to bring the space to temperature (without overshoot) prior to the scheduled time.the thermostat manages that automatically. Simply set the program schedule to the desired time to have the space at comfort temperature. In addition, program the temperature to this comfort temperature. The thermostat activates the heating or cooling at the proper time to reach the scheduled temperature at the scheduled time. The setpoint changes gradually to use economical stages and avoid overshoot. For example the space will be occupied at 8:00 M and the desired temperature is 70 F. Set the O period for 8:00 M and 70 F. The thermostat turns on the heat prior to 8:00 M to raise the temperature to 70 F by 8:00 M. The thermostat provides an alert that the heating or cooling system is coming on before a scheduled time by displaying ecovery on the screen. Minimum-Off Timer ompressor Protection The thermostat has an adjustable Minimum-Off Timer that can be set from zero to five minutes (Factory Setting five minutes). The Minimum-Off Timer can be bypassed through the Installer System Test or it can be bypassed permanently by setting the Minimum-Off Timer to 0 minutes in the Installer Setup. The Minimum-Off Timer is activated after the compressor turns off: If the thermostat is system powered (common wire), the Minimum-Off Timer is also activated upon initial startup and after power interruptions. If there is a call for cooling or heating during the Minimum- Off Time, the thermostat displays Wait. When the Minimum Off Timer expires, ool On or Heat On (heat pumps only) appears solidly in the display and the compressor and fan turn on. Economizer/TOD ogic (Table 8) Table 8. Operation of Terminal. Effective Occupancy all for ool Terminal Economizer TOD Occupied Energized Energized Unoccupied es Energized De-energized No De-energized De-energized Override Energized Energized Heat Pump Temperature ockouts Dual Fuel Heat Pump and Outdoor Temperature Sensor In this operation, there is no external fossil fuel kit (dual fuel kit) installed; the thermostat controls this function:. hoose correct heat pump application in ISU 070.. hoose Outdoor Temperature Sensor for Heat Pump Temperature ockouts Option in ISU 040.. hoose appropriate Balance Point Temperature in ISU 050. OPETION IN HET MODE BOVE BNE POINT (OUTDOO TEMPETUE) When the outdoor temperature is above the selected Balance Point Temperature (ISU 050), only the compressor operates and the fan ( terminal) energizes when the thermostat calls for heat. OPETION IN HET MODE BEOW BNE POINT (OUTDOO TEMPETUE) When the outdoor temperature is below the selected Balance Point Temperature (ISU 050), only the Fossil Fuel (auxiliary heat) operates and the fan ( terminal) does not energize when the thermostat calls for heat. 6-65 0
Heat Pump with uxiliary (Backup) Heat and Outdoor Temperature Sensor. hoose correct heat pump application in ISU 070.. hoose Outdoor Temperature Sensor for ontrol Option in ISU 040.. hoose ompressor ockout Temperature in ISU 050. 4. hoose uxiliary ockout Temperature in ISU 060. There is a 5 F deadband between ompressor and uxiliary Heat lockout temperatures Operation in Heat Mode When the outdoor temperature is: Below ompressor ockout Temperature: only uxiliary Heat operates. bove uxiliary ockout Temperature: only the ompressor operates. See Fig.. Between the two temperatures: both the ompressor and uxiliary Heat operate. OUTDOO TEMPETUE 50 5 Fig. 4. Heat Pump Operation with ockout Temperatures Set. Operating Sequence The thermostat energizes specific terminal(s), depending on the demand for heating, cooling or fan. The thermostat screen shows the time, inside temperature, system and fan selections. dditional indicators are shown when the heating, cooling or fan is energized. See Tables 9 and 0 for specification information. Table 9. Sequence of Operation for onventional Systems. System Setting Fan Setting all for ction Energize Terminals Off uto ool uto ool or uto ool or uto uto Stage ooling uto Stages and ooling Screen Message, ool On, a, ool On Heat uto Heat or uto Heat or uto OMPESSO ON BOTH OMPESSO ND UXII HET UXII ON uto Stage Heating uto Stages and Heating UXII OKOUT TEMPETUE OMPESSO OKOUT TEMPETUE M9950 W, b Heat On W, W c, b Heat On a If Installer Setup System type is set to two stages of cooling. b energizes only if Installer Setup 080 is set to Electric. c If Installer Setup System type is set to two stages of heating. Table 0. Sequence of Operation for Heat Pump Systems. System Setting Fan Setting all for ction Energize Terminals Screen Message Off uto O/B a ool ool or uto a onfigure O/B in Installer Setup. Based on last piece of equipment called (cooling = O; heating = B). b If Installer Setup System Type is set to Heat/ool Heat Pump with uxiliary Heat. c If Installer Setup System Type is set to Heat/ool Heat Pump with uxiliary Heat. d This terminal does not energize if Installer Setup System type is set to Heat/ ool Heat Pump with no uxiliary Heat. Second Stage Heat and ool ontrol While maintaining setpoint, several factors affect when nd stage energizes such as load conditions, environmental conditions, P+I control, and home insulation. The second stage energizes when the thermostat senses st stage is running at 90% capacity. This operation is droopless control. Temperature Sensor Operation and heckout llow outdoor or indoor temperature sensor to absorb the air for a minimum of five minutes before taking a reading. See the Sensor instructions for more information. uto Stage ooling,, O/B a ool On Stages and ooling, b,, O/B a Heat uto None O/B a Heat or uto uto Stage Heating,, O/B a Heat On Stages and Heating Stages, and Heating, W c,, O/B a, b, W d,, O/B a The 7089U, 789U, and T7770 Temperature Sensors are calibrated at the factory and cannot be recalibrated in the field. 7089U Outdoor Temperature Sensor uxiliary Heat On Operation When installed with Thermostat ISU 040 set to or, the thermostat can display outside temperature. heckout llow 7089U Outdoor Sensor to absorb outdoor air for a minimum of twenty minutes before taking a reading. With an accurate thermometer (± F [0.5 ]) measure the temperature at the sensor location, allowing time for the thermometer to stabilize before reading. To verify sensor resistance, remove one wire from one of the 7089U 60-in. leadwires. Use an ohmmeter to measure the resistance across the sensor. Then compare sensor accuracy with the temperature/resistance curve in Fig. 4. 6-65
789U emote Indoor Temperature Sensor Operation When installed with Thermostat ISU 040 set to, the remote inside temperature is displayed on the Thermostat Home Screen as Inside Temperature. The thermostat internal temperature sensor is not used. The 789U can be used to provide one remote sensor input or as a temperature averaging network with multiple 789U Sensors connected, as shown in Fig. 0. heckout For best results, allow 789U Wall Mount Temperature Sensor to absorb the air moving through the room for a minimum of twenty minutes before taking a resistance measurement. With an accurate thermometer (± F [0.5 ]) measure the temperature at the sensor location, allowing time for the thermometer to stabilize before reading. To verify sensor resistance, remove one wire from one of 789U wiring terminals. Use an ohmmeter to measure the resistance across the sensor. Then compare sensor accuracy with the temperature/resistance curve in Fig. 4. T7770 emote Temperature Sensor Operation When installed with Thermostat ISU 040 set to or 4, the remote inside temperature is displayed on the Thermostat Home Screen as Inside Temperature. The thermostat internal temperature sensor is not used. The T7770 can be used to provide one remote sensor input or as a temperature averaging network with multiple T7770 Sensors connected, as shown in Fig. 7 through 9. heckout For best results, allow T7770 Wall Mount Temperature Sensor to absorb the air moving through the room for a minimum of twenty minutes before taking a resistance measurement. With an accurate thermometer (± F [0.5 ]) measure the temperature at the sensor location, allowing time for the thermometer to stabilize before reading. To verify sensor resistance, remove one wire from one of the wiring terminals. Use an ohmmeter to measure the resistance across the sensor. Then verify the sensor accuracy with the temperature/resistance in Fig. 44. 0K 90K 80K 70K ESISTNE (OHMS) 60K 0K 00K 90K 60K ESISTNE (OHMS) 60K 50K 40K 0K 0K 0K OHM T 77 o F (5 o ) 0K 0K OHM T 77 o F (5 o ) 0K 0K -40-0 0 0 40 60 80 00 0-40 -0-0 -0 0 0 0 0 40 50 TEMPETUE (DEEES) M8 Fig. 4. 0K ohm sensor resistance versus temperature. o F o 0 40 50 60 70 80 90 00 0 0 0 0 0 40 TEMPETUE (DEEES) o F o M5874 Fig. 44. 0K ohm sensor resistance versus temperature. 6-65