B70U CommercialPO Programmable hermostat PPLICION INSLLION INSUCIONS he B70U Programmable hermostat provides electronic control of 4 Vac heating and cooling systems. See able for a description. able. B70U hermostat Description. Feature Description Powering Methods Battery only Direct connection to a 4 Vac transformer only Direct connection to a 4 Vac transformer with battery backup System ypes Conventional (up to Heat, Cool stages) Heat Pump (up to Heat, Cool stages) Changeover Manual or automatic changeover (selectable) System Setting Heat-Off-Cool-uto Fan Setting uto-on MEU NOICE 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. Select hermostat Location 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.. Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control. INSLLION hen Installing this Product.... ead these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. Check 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. CUION Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry. Disconnect power supply before installation. NO NO ES 5 FEE [.5 MEES] Fig.. Select thermostat location. M58 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. Concealed pipes and chimneys. Unheated (uncooled) areas such as an outside wall behind the thermostat. NO 6-0
B70U COMMEILPO POMMBLE HEMOS Separate allplate from hermostat. Separate the wallplate from the thermostat. See Fig.. LLPLE IE HOLE. 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. ap 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. DILLED HOLES () LL NCHOS () HEMOS M67 Fig.. Separate wallplate from thermostat. Install allplate (See Fig. ) 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. Level the wallplate for appearance only. M68 LLPLE Fig.. Install wallplate. MOUNIN SCES () IIN IMPON ll wiring must agree with applicable codes, ordinances and regulations. Use 8 gauge thermostat wire. Shielded cable is not required. NOES: Sensor wires must have a cable separate from the thermostat control cable. efer to able for terminal designation descriptions. See Fig. 6 through 6 for wiring diagrams for specific equipment applications.. Loosen screw terminals used for the application.. Insert the wires into the terminal block and tighten each screw terminal. 4. Push excess wire back into the wall opening and restrict wires to the shaded area. See Fig. 5. 5. Plug the wall opening with nonflammable insulation to prevent drafts from affecting the thermostat. IE LLPLE. Select set of terminal identifications that correspond to your system type (conventional or heat pump). (See Fig. 4). SCE EMINLS C O/B C S S S S LL OPENIN SHDED E M66 Fig. 5. estrict wires to shaded area of wire hole. CONVENIONL HE PUMP M00 Fig. 4. erminal identifications for system type. 6-0
B70U COMMEILPO POMMBLE HEMOS erminal Designation (see Note ) (see Note ) C (see Note ) O/B (see Note ) (see Note 4) S (See Note 5) S (See Note 5) able. erminal 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. Compressor output. Common wire from secondary side of cooling system transformer. Heat relay. Fan relay. Second stage heat relay. Second stage cooling. Changeover valve for heat pumps. Economizer/ime-Of-Day (OD) output powered via terminal. Optional outdoor or indoor remote sensor. Optional outdoor or indoor remote sensor. NOES:. hen used in a single-transformer system, leave metal jumper wire in place between and. If used on a two-transformer system, remove metal jumper wire between and.. Common wire is optional when thermostat is used with batteries. hen 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. hen 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. able. iring Diagrams. System ype allplate erminal Identifications iring Diagram Figure Standard Heat/Cool Conventional 6, 7 Heat Only Conventional 8 Heat Only with Fan Conventional 9 Cool only Conventional 0 Standard Multistage Conventional, up to Heat/ Cool Heat Pump Heat Pump, 4 (No uxiliary Heat) Heat Pump Heat Pump 5, 6 (with uxiliary Heat) Multiple 7770 Sensors 7, 8, 9 Multiple C789U Sensors 0 erminal iring Details for Economizers ire the terminal to the 7 N terminal, or the 7459 terminal. hen using dual transformers at the thermostat, the cooling transformer must power the economizer. he signal is powered from the terminal and energizes the economizer to signal occupied status and drive the damper to the set minimum position. 6-0
B70U COMMEILPO POMMBLE HEMOS Conventional System iring L L 4 VC HE EL COMPESSO CONCO FN EL C S S OUDOO/INDOO EMPEUE SENSO L L 4 VC HE EL ECONOMIZE C S S OUDOO/INDOO EMPEUE SENSO POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. ECONOMIZE FCO INSLLED JUMPE. POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. M0 FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. M0 Fig. 8. ypical hookup of heat-only system. Fig. 6. ypical wiring of single transformer H/C system. L 4 VC L COOLIN NSFOME C S S L L 4 VC HE EL C FN EL ECONOMIZE S S OUDOO/INDOO EMPEUE SENSO L L HEIN NSFOME 4 VC FN EL COMPESSO CONCO HE EL OUDOO/INDOO EMPEUE SENSO ECONOMIZE POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. M04 Fig. 9. ypical hookup of heat-only system with fan. EMOVE FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. HEN USED, HE COMMON MUS CONNEC O HE COOLIN NSFOME SECOND. M0 Fig. 7. ypical hookup of dual transformer H/C system. L L 4 VC C S S COMPESSO CONCO FN EL OUDOO/INDOO EMPEUE SENSO ECONOMIZE POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. M05 Fig. 0. ypical hookup of cool-only system. 6-0 4
B70U COMMEILPO POMMBLE HEMOS L L 4 VC C S S L 4 VC L COOLIN NSFOME C S S COOL EL FN EL HE EL COOL EL OUDOO/INDOO EMPEUE SENSO HE EL ECONOMIZE POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. Fig.. ypical hookup of single transformer multistage system (up to H/C). M06 L L HEIN NSFOME COOL EL FN EL COOL EL OUDOO/INDOO EMPEUE SENSO HE EL HE EL 4 VC ECONOMIZE POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. EMOVE FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. HEN USED, HE COMMON MUS CONNEC O HE COOLIN NSFOME SECOND. M07 Fig.. ypical hookup of dual transformer multistage system (up to H/C). 5 6-0
B70U COMMEILPO POMMBLE HEMOS Heat Pump System iring L L 4 VC C 4 O/B S S L L 4 VC C 4 O/B S S CHNEOVE VLVE COMPESSO CONCO FN EL OUDOO/INDOO EMPEUE 5 SENSO ECONOMIZE POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. 4 "O/B" EMINL SE O CONOL S EIHE "O" O "B" IN HE INSLLE SEUP. 5 OPIONL OUDOO O INDOO EMOE SENSO. IES MUS HVE CBLE SEPE FOM HE HEMOS CBLE. M08 Fig.. ypical hookup of single-stage heat pump with no auxiliary heat (H/C). CHNEOVE VLVE COMPESSO CONCO FN EL ECONOMIZE OUDOO/INDOO EMPEUE 5 SENSO UXILI HE EL POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. 4 "O/B" EMINL SE O CONOL S EIHE "O" O "B" IN HE INSLLE SEUP. 5 OPIONL OUDOO O INDOO EMOE SENSO. IES MUS HVE CBLE SEPE FOM HE HEMOS CBLE. M00 Fig. 5. ypical hookup of single-stage heat pump with auxiliary heat (H/C). L L 4 VC FN EL C 4 O/B CHNEOVE VLVE COMPESSO COMPESSO S S OUDOO/INDOO EMPEUE SENSO 5 ECONOMIZE L L 4 VC C 4 O/B CHNEOVE VLVE COMPESSO FN EL S S OUDOO/INDOO EMPEUE 5 SENSO UXILI HE EL POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. COMPESSO ECONOMIZE FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. 4 "O/B" EMINL SE O CONOL S EIHE "O" O "B" IN HE INSLLE SEUP. 5 OPIONL OUDOO O INDOO EMOE SENSO. IES MUS HVE CBLE SEPE FOM HE HEMOS CBLE. M09 Fig. 4. ypical hookup of multistage heat pump with no auxiliary heat (H/C). POE SUPPL. POVIDE DISCONNEC MENS ND OVELOD POECION S EQUIED. FCO INSLLED JUMPE. HEN USIN BEIES, HE 4V COMMON CONNECION IS OPIONL. 4 "O/B" EMINL SE O CONOL S EIHE "O" O "B" IN HE INSLLE SEUP. 5 OPIONL OUDOO O INDOO EMOE SENSO. IES MUS HVE CBLE SEPE FOM HE HEMOS CBLE. Fig. 6. ypical hookup of multistage heat pump with auxiliary heat (H/C). M0 6-0 6
Sensor iring for emperature veraging B70U COMMEILPO POMMBLE HEMOS 7770 SUBBSE S S 7770 SUBBSE S S 7770006 4 777000 7770 7770 7770006 M8 Fig. 7. iring four 7770006 (0K ohm) Sensors. SUBBSE S S HE 777000 IS 0K OHM SENSO. M94 Fig. 9. iring two 7770006 (0K ohm) Sensors and one 777000 (0K ohm) sensor to provide a temperature averaging network SUBBSE S S 4 4 C789 C789 777000 777000 HE 777000 IS 0K OHM SENSO. M9 C789 C789 Fig. 8. iring two 777000 (0K ohm) Sensors to provide a temperature averaging network. IES MUS HVE CBLE SEPE FOM HE HEMOS CBLE. M07 Fig. 0. iring four C789U (0K ohm) Sensors to provide a temperature averaging network. 7 6-0
B70U COMMEILPO POMMBLE HEMOS POE HE HEMOS 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). iring 4 Vac Common Single-ransformer System Connect the common side of the transformer to the C screw terminal of the thermostat wallplate. Leave the metal jumper wire in place between and. wo-ransformer System Connect the common side of the cooling transformer to the C screw terminal of the thermostat wallplate. emove the metal jumper wire between and. Installing Batteries. Install two alkaline batteries on the back of the thermostat as marked. See Fig.. BEIES () BE HOLDE EMOVE B EMOVE DUIN INSLLION EMOVE DUIN INSLLION M60 Fig.. emove tab labeled EMOVE from thermostat back. Mount hermostat to allplate. lign the terminal screw blocks with the pins on the back of the thermostat.. Push the thermostat straight onto the wallplate until it snaps into place. See Fig.. LL BCK OF HEMOS M59 Fig.. Installing batteries.. Locate and remove the tab labeled emove. See Fig.. M04 IMPON his tab must be removed in order to set the real-time clock. Fig.. Mount thermostat to wallplate. 6-0 8
SEIN CLEND ND IME B70U COMMEILPO POMMBLE HEMOS his 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. here are two ways to set the calendar and time for this thermostat: SEIN DE/IME HEN HEMOS IS FIS POEED hen the thermostat is first powered, the display is ready to set the calendar and time. he thermostat proceeds through a sequence of setup screens. See Fig. 4. SEIN DE/IME FE HEMOS IS LED FUNCIONIN Use the installer setup to set year, month and day. See the Installer Setup Numbers, Settings, and ests section. E MONH D UP ND DON BUONS CHNES MONH, D, E ND IME ue PM DeSelect Day System & Fan FanUseEdit Schedule View Clock & More Done O BCK BUON OES BCK O LS SEIN NEX BUON DVNCE O NEX SEIN DONE BUON DVNCES O IME SEIN SCEEN ND HOME SCEEN M0 Fig. 4. Setting calendar and time after initial powerup. DVNCED SEINS he thermostat has advanced settings to match the HVC system. hese settings can be adjusted to match specific needs. See the following section (Installer Setup Numbers, Settings, and ests) for details. 9 6-0
B70U COMMEILPO POMMBLE HEMOS INSLLE SEUP NUMBES, SEINS, ND ESS (BLE 4) Configure Installer Setup. Press and release the System key.. Press System and Done keys simultaneously.. Hold keys for approximately five seconds, until the screen changes. 4. hen the display changes, release the System and Done keys. NOE: See able 4 for installer setup (ISU) numbers and settings. Installer System ests Use the Installer System est section to test the heating, cooling and fan. efer to the latter portion of able 4. CUION Equipment Damage Hazard. Minimum compressor off time is bypassed during Installer System est void cycling compressor quickly. IMPON Use Installer System est to test heating, cooling and fan. he setting chosen for System ype (Installer Setup Number 070) can prevent some System est Numbers from appearing. Installer Setup Number Installer Setup Name able 4. Installer Setup Menu. Default Setting ll Settings Notes 00 Date (ear Upper) 0 0 0xx vailable year range: 00-78 xx 00 Date (ear Lower) 04 00-99 vailable year range: 00-78 040 Date (Month) 6-050 Date (Day) 5 - (Month Dependent) 060 Schedule Options 4 0 Non-Programmable 4 Programmable 070 System Selection 8 H/C Conv H/C HP H w/o fan 4 H with fan 6 C 7 H/C HP 8 H/C Conv 9 H/C Conv 0 H/C Conv H/C HP H/C HP 075 OD/Economizer output (terminal ) 0 0 Unused OD Economizer 080 Heat Fan Operation 0 0 System controls fan hermostat controls fan (ON during call for heat) 085 Pre-occupancy Purge Duration 090 eversing Valve O/B 00 Cycles Per Hour (CPH) for first stage compressor 00 CPH for second stage compressor 0 0 no duration one hour two hours three hours 0 0 O (O/B On Cool) B (O/B On Heat) Economizer energizes during a call for cool. OD energizes during Occupied period, and deenergizes during Unoccupied. Only shown for conventional system with heat stages (ISU 070) and fan capability selected. If heat pump is selected, fan always operates with hermostat control. he only thing that allows the fan to turn off during occupied periods is a manual override of the fan from On to uto. Only shown if thermostat is programmable (ISU 060). 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 (ISU 070). Selection in this stage changes second stage cool default CPH. -6 Only shown for system with two stages of cool (ISU 070). 6-0 0
Installer Setup Number Installer Setup Name 040 CPH for first stage conventional heat 050 CPH for second stage conventional heat 060 CPH for third Stage Heat 070 CPH for uxiliary Heat 080 Continuous Backlight B70U COMMEILPO POMMBLE HEMOS 5 - Only shown for conventional system with heat stages (ISU 070). Selection in this stage changes default CPH of second stage heat. 9 - Only shown for conventional system with at least two stages conventional heat or H/C heat pump (ISU 070). 9 - Only shown for H/C heat pump system (ISU 070). 9 - Only shown for multi-stage heat pump system with more heat than cool stages (ISU 070). 0 0 No es 000 Changeover 0 Manual uto 00 Deadband F ( C) 00 emperature Indication Scale 0 0 F C (.5) F (.5 C) (.0) F (.0 C) 4 (.5) 4 F (.5 C) 5 (.0) 5 F (.0 C) 6 (.5) 6 F (.5 C) 7 (4.0) 7 F (4.0 C) 8 (4.5) 8 F (4.5 C) 9 (5.0) 9 F (5.0 C) 00 Daylight Saving 0 Disabled Enabled (US) 040 emote emperature Sensor 050 Heat Pump Compressor Lockout 060 Heat Pump uxiliary Lockout 055 emporary Occupied Duration Limit 0 0 None Outdoor for Display Outdoor for Control emote 0K Indoor 4 emote 0K Indoor 0 0 None 5(-9.5) 5 F(-9.5 C) 0(-6.5) 0 F(-6.5 C) 5(-4.0) 5 F(-4.0 C) 0(-.0) 0 F(-.0 C) 5(.5) 5 F(.5 C) 40(4.5) 40 F(4.5 C) 45(7.0) 45 F(7.0 C) 0 0 None 40(4.5) 40 F(4.5 C) 45(7.0) 45 F(7.0 C) 50(0.0) 50 F(0.0 C) 55(.0) 55 F(.0 C) 60(5.5) 60 F(5.5 C) 0 no duration one hour two hours three hours 4 four hours 0540 Number of Periods 4 Periods 4 4 Periods 0580 Minimum Compressor Off ime 0600 Heat emperature ange Stops able 4. Installer Setup Menu. (Continued) Default Setting ll Settings Notes 5 0 Off minutes minutes 4 4 minutes 5 5 minutes lways shown. If C power not present the option is overridden and normal backlight operation occurs. Only shown for system with both heat and cool stages (ISU 070). Only shown for uto Changeover system (ISU 000). 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 (ISU 070) and remote outdoor control sensor (ISU 040 is ). Must enforce a dead band between this and uxiliary Lockout. Only shown for heat pump systems with more heat stages than cool (ISU 070) and remote outdoor control sensor (ISU 040 at ). Must enforce a dead band between this and Heat Pump Compressor Lockout. 0 means no limit. Does not appear if Non-programmable is chosen (ISU 060). pplies to all days of the week. Only shown if system has cool stages (ISU 070). 90 40 to 90 F (4 to C) Only shown if system has heat stages (ISU 070). 6-0
B70U COMMEILPO POMMBLE HEMOS Installer Setup Number 060 Cool emperature 50 50 to 99 F (0 to 7 C) Only shown if system has cool stages (ISU 070). ange Stops 0640 Clock Format Hour 4 4 Hour 0650 Extended Fan-on time Heat 0660 Extended Fan-on time Cool 0 0 Off 90 90 seconds 0 0 Off 40 40 seconds 0670 Keypad Lockout 0 0 Unlocked Partial Lockout Partial Lockout Fully Locked 0680 emperature Control Heat 0685 ecovery Heat amp ate 0690 emperature Control Cool 0695 ecovery Cool amp ate 0700 emperature Display Offset 070 estore Factory Defaults INSLLE ESS est Installer est Cool est est est 4 est 8 Installer Setup Name Installer est Fan Installer est Heat Installer est uxiliary Heat Installer est OD/Economizer able 4. Installer Setup Menu. (Continued) Default Setting ll Settings Notes Less ggressive Standard More ggressive Not displayed with cool-only systems (ISU 070) or with fan set to system control (ISU 080 at 0). Only shown for systems with cool stages (see ISU 070). Unlocked: ll functions accessible. Partial : Locks all but Holiday, Override, and Up/ Down. Partial : Locks all but Holiday and Override. Full: Entire interface locked/non-functional. Only shown if system has heat stages (ISU 070). 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 (ISU 070). 0 disables ramped recovery (step setpoint change at period start time). Less ggressive Standard More ggressive Only shown if system has cool stages (ISU 070). 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 (ISU 070). 0 disables ramped recovery (step setpoint change at period start time). 0 - (-.5) - F (-.5 C) - (-.0) - F (-.0 C) - (-0.5) - F (-0.5 C) 0 (0.0) 0 F (0.0 C) (0.5) F (0.5 C) (.0) F (.0 C) (.5) F (.5 C) 0 0 No es 0 0 Off Cool Stage Cool Stage 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 OD/Economizer Off OD/Economizer On his offset applies to both the control temperature and to the display temperature for indoor sensor (and remote indoor sensor). esets all ISU parameters to default values and resets the schedule to default Energy Star (see able 5). etains only calendar settings and time. NOE: Press the Done key to exit the Installer System est. 6-0
B70U COMMEILPO POMMBLE HEMOS OPEION System Settings Heat hermostat controls the heating system. Off Both heating and cooling systems are off. Cool hermostat controls the cooling system. uto hermostat automatically changes between heat and cool operation, depending on indoor temperature. Fan Settings uto Fan runs only when heating/cooling system is on. On Fan runs continuously. able 5 shows default program settings. See Owner s uide for complete instructions to change the program. able 5. Energy Star Default Program Settings. Schedule Period ime Heat Occ 8:00am 70 F ( C) Unocc 0:00pm 55 F (0 C) Occ :00pm 70 F ( C) Unocc :00pm (Noon) 55 F (0 C) Setpoints Cool 75 F (5.5 C) 85 F (4 C) 75 F (5.5 C) 85 F (4 C) Minimum-Off imer (Compressor Protection) he thermostat has an adjustable Minimum-Off imer that can be set from zero to five minutes (Factory Setting five minutes). he Minimum-Off imer can be bypassed through the Installer System est or it can be bypassed permanently by setting the Minimum-Off imer to 0 minutes in the Installer Setup. he Minimum-Off imer is activated after the compressor turns off: If the thermostat is system powered (common wire), the Minimum-Off imer is also activated upon initial startup and after power interruptions. If there is a call for cooling or heating during the Minimum-Off ime, the thermostat displays ait. hen the Minimum Off imer expires, Cool On or Heat On (heat pumps only) appears solidly in the display and the compressor and fan turn on. Outdoor or Indoor emperature Sensor 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. Economizer/OD Logic (able 6) able 6. Operation of erminal. Fan Setting On uto On uto Effective Occupancy Call for Cool erminal Economizer OD Occupied Energized Energized Unoccupied es Energized De-energized No De-energized De-energized Override Energized Energized Heat Pump emperature Lockouts Dual Fuel Heat Pump and Outdoor Sensor In this operation, there is no external fossil fuel kit (dual fuel kit) installed; the thermostat controls this function:. Choose correct heat pump application in Installer Setup Number 070.. Choose Outdoor emperature Sensor for Heat Pump emperature Lockouts Option in Installer Setup Number 040.. Choose appropriate Balance Point emperature in Installer Setup Number 050. OPEION IN HE MODE BOVE BLNCE POIN (OUDOO EMPEUE) hen the outdoor temperature is above the selected Balance Point emperature (ISU 050), only the compressor operates and the fan ( terminal) energizes when the thermostat calls for heat. OPEION IN HE MODE BELO BLNCE POIN (OUDOO EMPEUE) hen the outdoor temperature is below the selected Balance Point emperature (ISU 050), only the Fossil Fuel (auxiliary heat) operates and the fan ( terminal) does not energize when the thermostat calls for heat. Heat Pump with uxiliary (Backup) Heat and Outdoor emperature Sensor. Choose correct heat pump application in Installer Setup Number 070.. Choose Outdoor emperature Sensor for Control Option in Installer Setup Number 040.. Choose Compressor Lockout emperature in Installer Setup Number 050. 4. Choose uxiliary Lockout emperature in Installer Setup Number 060. NOE: here is a 5 F deadband between Compressor and uxiliary Heat lockout temperatures. Operation in Heat Mode hen the outdoor temperature is: Below the Compressor Lockout emperature, only the uxiliary Heat operates. bove the uxiliary Lockout emperature, only the Compressor operates. See Fig.. Between the two temperatures, both the Compressor and uxiliary Heat operate. OUDOO EMPEUE 50 5 COMPESSO ONL BOH COMPESSO ND UXILI HE UXILI ONL UXILI LOCKOU EMPEUE COMPESSO LOCKOU EMPEUE Fig. 5. Heat Pump Operation with Lockout emperatures Set. M9950 6-0
B70U COMMEILPO POMMBLE HEMOS OUBLESHOOIN (BLE 7) able 7. roubleshooting. Symptom Possible Cause ction Display does not come on. hermostat is not being powered. Check for 4 Vac between C and. Check that batteries are installed correctly and are good. emperature settings do not change. Heating or cooling does not come on. hermostat is calling for Heat (Heat on) or Cool (Cool on) but no heating or cooling is running. Heat does not turn on (Heat On is solid in the display). Heat pump puts out cool air in the heat mode and warm air in the cool mode. Both the heating and cooling equipment are running at the same time. Cooling does not turn on (Cool On is solid in the display). he upper or lower temperature limits were reached. he keypad is fully locked. hermostat minimum off-time is activated. System selection not set to Heat or Cool. System type Selection is incorrect. Heating or cooling equipment is not operating. Heating equipment failure. Loose or broken wire connection between thermostat and heating equipment. Changeover Valve (Installer Setup Number 090) is not configured to match the changeover required by the installed heat pump. he heating equipment is not a heat pump but the System ype (Installer Setup Number 070) is set to Heat Pump. Heating and cooling wires are shorted together. Cooling equipment failure. Check temperature setpoints. Check Installer Setup Numbers 0600 and 060; modify as needed. Check Installer Setup Number 0670 to change keypad locked options. ait up to five minutes for the system to respond. Set system Selection to correct position. Check Installer Setup Number 070 and make sure correct System type is chosen. Check wiring. Check Installer Setup Number 070 and make sure correct system type is chosen. Verify operation of equipment in System est mode. Check for 4 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem. Check for 4 Vac between the heat terminal () and transformer common. If 4 Vac is present, the thermostat is functional. Check the heating equipment to find the cause of the problem. Check for 4 Vac between the heat terminal () and transformer common. If voltage is not present, check wire connection (loose or broken) between the thermostat and the heating equipment. Set Changeover Valve (Installer Setup Number 090) to match the changeover required by the installed heat pump. Set System ype (Installer Setup Number 070) to match the installed heating and/or cooling equipment. Separate the shorted heating and cooling wires. Check for 4 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem. Loose or broken wire connection between thermostat and cooling equipment. Check for 4 Vac between the cool terminal () and transformer common. If 4 Vac is present, the thermostat is functional. Check the cooling equipment to find the cause of the problem. Check for 4 Vac between the cool terminal () and transformer common. If voltage is not present, check the wire connection (loose or broken) between the thermostat and the cooling equipment. 6-0 4
Fan does not turn on in a call for heat (electric furnace). Heating equipment is running in the cool mode. B70U COMMEILPO POMMBLE HEMOS able 7. roubleshooting. (Continued) Symptom Possible Cause ction Heating equipment does not turn off and heat temperature setting is set below room temperature (Heat On is not in the display). Cannot set the system setting to Heat. Fan Control in Heating is set to as or Oil Furnace (Setting 080). Heating equipment is not a heat pump but System ype (Installer Setup Number 070) is set to Heat Pump. Heating equipment is not a heat pump but System ype (Installer Setup Number 070) is set to Heat Pump. System ype (Installer Setup Number 070) is set to Cool Only. Set Fan Control in Heating to Electric Furnace (Setting 080). Set System ype (Installer Setup Number 070) to match the installed heating and/or cooling equipment. Set System ype (Installer Setup Number 070) to match the installed heating and/or cooling equipment. Set System ype (Installer Setup Number 070) to match the installed heating and/or cooling equipment. Cannot set the system setting to Cool. Heat On is not in the display. Cool On is not in the display. ait is in the display. System ype (Installer Setup Number 070) is set to Heat Only or Heat Only with Fan. System setting is not set to Heat and/or temperature setting is not set above room temperature. System setting is not set to Cool and/or the temperature setting is not set below room temperature. Compressor minimum off timer is active. Set System ype (Installer Setup Number 070) to match the installed heating and/or cooling equipment. Set the system setting to Heat and set the temperature setting above the room temperature. Set the system setting to Cool and set the temperature setting below the room temperature. ait up to five minutes for the cooling or heating (heat pump) equipment to turn on. 5 6-0
B70U COMMEILPO POMMBLE HEMOS SPECIFICIONS Electrical atings: erminal Voltage (50/60 Hz) unning Current (Heating) 0-0 Vac 0.0 -.0 (Cooling) 0-0 Vac 0.0 -.0 (Fan) 0-0 Vac 0.0-0.60 (Economizer/OD) 0-0 Vac 0.0 -.0 emperature Setting ange: Heating: 40 F to 90 F (4.5 C to C). Cooling: 50 F to 99 F (0 C to 7 C). Operating mbient emperature: 0 F to 0 F (-8 C to 49 C). Shipping emperature: -0 F to 50 F (-4.4 C to 65.6 C). Operating elative Humidity (Non-condensing): 5% to 90%. hermostat Dimensions: -/4 in. (95 mm) high x 6 in. (5 mm) wide x -/8in. (5 mm) deep. ccessories: C7089U Outdoor Sensor: 0K ohm NC. C789U emote Indoor Sensor: 0K ohm NC. C777 Flush-Mount emote Indoor Sensor: 0K ohm NC. 7770006 all-mount emote Indoor Sensor: 0K ohm NC. 777000 all-mount emote Indoor Sensor: 0K ohm NC. utomation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 985 Douglas Drive North 5 Dynamic Drive olden Valley, MN 554 Scarborough, Ontario MV 4Z9 customer.honeywell.com U.S. egistered rademark 005 Honeywell International Inc. 6-0 B.B. ev. 07-05