400-280-007-B (TH146-N
Contents
1. 16 22 AWG 16 18 AWG D A AC146 410 O i i afe F i ele 5 n i AC144 03 PO o ien S ll iz DE H C system mm wil Dual Energy Si Geo Se 4 Vi H H cT241 saline e e 2 Z 281 IN Humidifier Ce eil zane 2 Dehumidifier Cooling Unit 1 Cooling Unit 2 Heating Unit 1 Heating Unit 2 Lac Heating Unit 3 400 280 007 B 5 24 07 Gbe technologies 7 10 Configuration Menu Item HP HVAC Parameters Display Options Default Description 1 V V Temperature format d IGE C F C Select the temperature display format Set the bP L limit see section 4 2 NOTE Lower bP L below its minimum if you do not wish to use this 2 V Balance point low hE l EC RE function rok 22 to 50 F 14 F 5 to 30 5C Set the bP H limit see section 4 2 3 H Balance point high Lo H a gt NOTE Raise bP H above its maximum if you do not wish to use this or on 23 to 86 F 41 F function Set the defrost point temperature see section 4 3 NOTE Raise the defrost point above its maximum if you do not wish to JEF 10 to 15 C 10 C CE S use this function 4 V Defrost point 14 to 59 F 50 F Set according to the type of heat pump installation see section 4 4 s Ad add on2. Use this setting when the indoor coils are located down stream of the auxiliary heat source This is generally the case for add on 5 y Installation type wie l Ad nr Ad installations nr normal Select this setting when the indoor coils are located upstream of the auxiliary heat source This is generally the case for new installations Auxiliary 6 d H EE 2 dp f interstage delay ch 5 to 90 min 30 min Set the interstage delay for the auxiliary stage see section 4 5 Set the low temperature limit of the plenum see section 4 6 NOTE This function is not used if you lower LLMT below its minimum or if the plenum temperature sensor is not connected to the controller 10 to 20 C 5 C 7 d Low temperature limit 14 to 68 F 41 F Gs a I Set the high temperature limit of the plenum see section 4 6 NOTE This function is not used if you raise HLMT above its maximum or if the plenum temperature sensor is not connected to the controller 30 to 90 C 70 C 8 d High temperature limit 86 to 194 F 158 F 4 aa Select the number of heating cooling cycles per hour For optimal heating control use the setting that matches your system as follows 3 20 min hot water 90 high efficiency furnace 4 15 min gas or oil 5 12 min gas or oil 6 10 min electric 9 V V Cycles per hour 2to6 4 m RS Z This setting determines the fan operation in automatic mode w
3. Ge i e H lenum sensor ili AC144 03 CS See alle 2 Dual Energy E LS Dual energy GC SEN A VI Unoccupied SE E H CT241 A Sieg Sch io r m K E wile 7 Humidifier GA H Dehumidifier SE ic H Ki Wo i CSL Dehumidifier S TH146 N U 400 280 007 B 5 24 07 5 10 Wiring Diagram 3H2C Heat Pump Add on Installation _ Dehumidifier TH146 N U ie OO 16 22 AWG D AC146 410 S GE We Plenum sensor ACI 44 03 Outdoor sensor os L i m Dual Energy SO ce Dual Energy U Le uw Unoccupied CT241 f a Ho Dehumidifier Humidifier O o m aube CT280 3H3C H C system 16 18 AWG 16 18 AWG fei S c od 2 r IB wn SE fresch mm m9081 O mm G S CSL w j nc i v H 16 22 AWG 16 18 AWG ER U i E Sg Set U g OOOO T fe Fer AR et E l o uw RC845 400 280 007 B 5 24 07 technologies 6 10 Wiring Diagram 3H2C HVAC TH146 N U
4. NOTE For gas operated HVAC systems there might be a delay before the fan starts or stops when heating is acti vated or deactivated e In continuous mode the fan runs continuously and the sym bol is displayed NOTE If Smart Fan is enabled when the ther mostat is in unoccupied mode the fan runs only when heating or cooling is activated TH146 N U 53 Indoor Humidity Outdoor Temperature Display The controller can display either the indoor humidity level or the out door temperature see page 8 item 13 JJ e De LL 5 CES Outdoor lt m Indoor temperature B 1 a0 m Ly E humidity Dr AUTO DA Temperature Adjustment The actual measured indoor temperature is normally displayed To view the setpoint temperature press one of the Got buttons once The setpoint is displayed for 5 seconds and is indicated by the symbol To modify the temperature setpoint press one of the Got buttons until the desired temperature is displayed NOTE If the controller is in automatic heat cool changeover see section 5 1 the setpoint is automatically reduced or raised by 1 1 8 when the controller switches to heating mode or to cooling mode respectively For example if the setpoint is 24 C 75 in heating mode it will become 25 77 F in cooling mode and will return to 24 C 75 when the controller switches back to heating mode 5 D Humidity Adjustment The humidity adjustment can b
5. heating to prevent overpres sure e New Installation In this type of installation as there is not already a furnace the auxiliary heat source is installed at the same time as the heat pump In this type of installation the indoor coils are located upstream of the auxiliary heat When TH146 N U the controller is configured for a new installation the heat pump and the auxiliary heat can operate simultaneously 4 5 Interstage Delay Interstage Delay is the time allocated for the temperature to return to an acceptable value when it deviates too far from the setpoint If this time has elapsed the next heating or cooling stage is activated The heating or cooling stage will be deactivated when the tempera ture returns to an acceptable value The Interstage Delay is fixed at 4 minutes if the controller is configured for an HVAC system and is user adjustable if it is configured for a heat pump see page 8 item 6 4 6 Low and High Temperature Limits Low Temperature Limit LLMT and High Temperature Limit HLMT are used to keep the plenum from becoming too cold or too hot During cooling if the plenum temperature is lower than LLMT a cooling stage is deactivated starting with the one that was last acti vated If after a while the temperature is still too low another cool ing stage is deactivated and so on Likewise during heating if the plenum temperature is higher than HLMT a heating stage is deacti vated starting with
6. is above the balance point high bP H the auxiliary heat is disabled and only the heat pump can be used see page 8 item 3 NOTE Balance Points cannot be used if the AC144 03 outdoor temperature sensor is not connected to the controller 4 3 Heating During Defrost heat pumps only The auxiliary heat is activated during defrost except under the fol lowing conditions When the outdoor temperature is above the defrost point see page 8 item 4 Note This condition will not apply if the AC 144 03 outdoor sensor is not connected to the controller e When the plenum temperature is above 40 C 104 F The auxiliary heat is re activated when the plenum temperature drops below 32 C 90 F Note This condition will not apply if the AC 146 410 plenum sensor is not connected to the control ler NOTE The auxiliary heat s short cycle protection is disabled during defrost 4 4 Types of Heat Pump Installations The controller can be configured for either of the following types of heat pump installations see page 8 item 5 e Add on Installation This type of installation is performed when adding a heat pump to an existing furnace When the heat pump is installed the furnace becomes the auxiliary heat source In this type of installation the indoor coils are usually installed downstream of the auxiliary heat source When the controller is configured for an add on installation the heat pump is disabled during auxiliary
7. the one that was last activated If after a while the temperature is still too high another heating stage is deacti vated and so on see page 8 items 7 and 8 WARNING LLMT and HLMT can be used in parallel with an UL353 approved device but they do not replace such device NOTE LLMT and HLMT cannot be used if the plenum temperature sensor is not connected to the controller 47 Smart Fan When Smart Fan is enabled see page 8 item 12 the fan operates as follows e During the unoccupied mode e when you are away from home the fan operates only when heating or cooling is acti vated e The fan operates continuously the rest of the time NOTE For Smart Fan to work set the fan to On see section 5 2 4 8 Automatic Humidification Dehumidification Changeover If a humidifier and a dehumidifier are both connected to the control ler the controller will automatically switch between the two devices to maintain the desired humidity level The changeover occurs when the humidity deviates from the setpoint by more than 3 for 30 min utes 400 280 007 B 5 24 07 3 10 Wiring Tables Heat Pump Terminal Device 1H1C 2H1C 3H1C 2H2C 3H2C 4
8. H2C 3H3C TH TH Console Connect the console between the TH terminals no polarity PS Plenum sensor Connect the plenum sensor between the PS and CS terminals no polarity cs Common S Common terminal for the plenum sensor and the outdoor sensor OS Outdoor sensor Connect the outdoor sensor between the CS and OS terminals no polarity DE Dual Energy Connect the dual register meter between the DE and CC terminals no polarity cc Common C Common terminal for the dual energy meter and the unoccupied mode input UN Unoccupied mode input Connect a dry contact between the UN and CC terminals no polarity H H Humidifier 24 Vac 1 A Connect the humidifier between the H terminals dry contact D A ER D Dehumidifier 24 Vac 1 A Connect the dehumidifier between the D terminals dry contact R S 2AN V V V V V V V c PWET PANSE J J J J J J J Y1 Compressor 1 24 Vac 1 A V V V V V y V Y2 Compressor 2 24 Vac 1 A V V V V Y3 Compressor 3 24 Vac 1 A V w1 Auxiliary heat 1 24 Vac 1 A V d d d W2 Auxiliary heat 2 24 Vac 1 A V V W3 0 B Reversing valve 24 Vac 1 A V V V d y V V G Fan 24 Vac 1A V d y V V y V L Fault 24 Vac 5 mA V y V V V y V Ww Defrost 24 Vac 5 mA V V V V V V V NC Not used HVAC Terminal Device 1H 2H 3H 1C 2C 3C 1H1C 1H2C 2H1C 2H2C 2H3C 3H1C 3H2C 3H3C TH TH Console Connect the console sensor between the TH terminals no polarity PS Plenum sensor Connect the plenum sensor between the PS and CS termin
9. Temporary Bypass If you change the temperature setpoint using the buttons in unoccupied mode the controller temporarily bypasses the current setpoint The new setpoint will be maintained for 2 hours after which the controller will return to the previous setpoint The p icon flashes during the bypass CT280 3H3C CONTROL MODULE Power supply 24 VAC Current consumption 150 mA Maximum load per output 1 A 24 VAC Short cycle protection 2 minutes Conirol cycles 2 to 6 per hour Operating temperature 0 C to 50 C 32 F to 122 F Storage temperature 20 C to 50 C 4 F to 122 F Humidity conditions 0 to 95 non condensing Dimensions 95 x 137 x 30 3 8 x 5 4 x 1 2 in TH146 USER CONSOLE Temperature setpoint range 5 C to 30 C 40 F to 86 F Humidity setpoint range 5 to 60 Indoor temperature display range 0 C to 70 C 32 F to 158 F Outdoor temp display range 50 C to 70 C 58 F to 158 F TH146 N U Temperature display resolution 0 5 C 1 F Program protection non volatile memory Operating temperature 0 C to 50 C 32 F to 122 F Storage temperature 20 C to 50 C 4 F to 122 F Humidity conditions 0 to 95 non condensing Dimensions 79 x 79 x 24 mm 3 1 x 3 1 x 1 in Aube warrants this product excluding battery to be free from defects in the workmanship or materials under normal use and service for a period of three 3 years from the date of purchase by t
10. als no polarity cs Common S Common terminal for both plenum sensor and outdoor sensor OS Outdoor sensor Connect the outdoor sensor between the OS and CS terminals no polarity DE Not used CC Common C Common terminal for the unoccupied mode input UN Unoccupied mode input Connect a dry contact between UN and R terminals no polarity H H Humidifier 24 Vac 1 A Connect the humidifier between the H terminals dry contact D aa om D Dehumidifier 24 Vac 1 A Connect the dehumidifier between the D terminals dry contact R e 24 Vac V V V V V V V V V V V V V V ower ac c VN A Ny y ERREECHEN RG a v Vi Cooling unit 1 24 Vac 1 A y V V V V V V V V V V Y2 Cooling unit 2 24 Vac 1 A V V V V V V Vy Y3 Cooling unit 3 24 Vac 1 A V V V w1 Heating unit 1 24 Vac 1 A V V V V V V V V V w2 Heating unit 2 24 Vac 1 A V V V V V Vy Vy V W3 0 B Heating unit 3 24 Vac 1 A V V V V G Fan 24 Vac 1 A V V V V V V V V V V V V V V Not used WW Not used NC Not used TH146 N U 400 280 007 B 5 24 07 4 10 Wiring Diagram 2H1C Heat Pump New Installation as be d technologies R OO c e 16 22 AWG 16 18 AWG o f AC146 410 fr ae f 2 comeressor
11. d technologies TH146 N U Installation Guide Non programmable H C Controller Removable Connector Removable Connector A U D SZ LO w Im won D L U Q 0000000000 Ls w Ne AC144 03 Outdoor TH146 User Console To remove a connector from the control module pry with a screwdriver CT280 3H3C Control Module Temperature Sensor 1 1 Applications The TH146 N U electronic controller can be used with any of the fol lowing heating cooling systems Heat pump 1H1C 2H1C 2H2C 3H1C 3H2C 3H3C 4H2C HVAC 1H 2H 3H 10 2C 3C 1H1C 1H2C 2H1C 2H2C 2H3C 3H1C 3H2C 3H3C The following devices can be connected to the controller air recirculation fan humidifier dehumidifier or air exchanger dual register meter dual energy remote control device for the unoccupied mode vvv v v 1 2 supplied Parts e CT280 3H3C control module e TH146 console with two wall anchors and mounting screws e AC144 03 outdoor temperature sensor 3 m or 10 ft with mount ing clip see section 2 7 1 A Accessories e RC845 relay see section 2 4 e AC146 410 plenum temperature sensor see section 2 8 e CT241 telephone contro
12. e placed in manual mode or in auto matic mode see page 8 item 16 Manual Adjustment In manual adjustment the user sets the humidity level 5 to 60 Automatic Adjustment In automatic adjustment the controller sets the humidity level based on the outdoor temperature to prevent ice formation or condensa 400 280 007 B 5 24 07 9 10 tion on windows However the user can apply an offset 9 to 9 For example the user can enter a negative offset if there is too much condensation on the windows Procedure The procedure to set the humidity level in manual mode or the off set in automatic mode is as follows 1 Press the Mode button for 3 seconds One of the following displays appears CT Offset set i l by user Humidity level set Ba IM IC lt g Humidity level by user IJL J 5 S set by controller SPH SPH 2 Set the humidity level or offset using the buttons e humidity level 5 to 60 e offset 9 to 9 3 Press the button to exit The symbol is displayed when the humidifier is On 5 6 Unoccupied Mode You can place the controller in the unoccupied mode using a remote control device such as Aube s CT241 telephone controller In this mode the temperature is lowered in heating mode or raised in cool ing mode see page 8 item 13 The gp icon appears during the unoccupied mode NOTE Automatic heating cooling changeover is disabled during the unoccupied mode 5 7
13. he consumer If at any time during the warranty period the product is determined to be defective or malfunctions Aube shall repair or replace it at Aube s option If the product is defective i return it with a bill of sale or other dated proof of purchase to the place from which you purchased it or ii contact Aube Aube will make the determination whether the product should be returned or whether a replacement product can be sent to you This warranty does not cover removal or reinstallation costs This warranty shall not apply if it is shown by Aube that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer Aube s sole responsibility shall be to repair or replace the product within the terms stated above AUBE SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY EXPRESS OR IMPLIED OR ANY OTHER FAILURE OF THIS PRODUCT Some provinces and states do not allow the exclusion or limitation of incidental or consequential damages so this limitation may not apply to you THIS WARRANTY IS THE ONLY EXPRESS WARRANTY AUBE MAKES ON THIS PRODUCT THE DURATION OF ANY IMPLIED WARRANTIES INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE THREE YEAR DURATION OF THIS WARRANTY Some provinces and states do not allow l
14. hen the sys tem is in heating mode see section 5 2 e EL electric heating The fan starts and stops at the same time as heat GA EL EL ing ae GC GA gas or oil heating The fan starts when the temperature inside the plenum rises above the Fan Limit see item 11 and stops when the tem perature drops 12 C below the Fan Limit Note The fan will not start if the plenum temperature sensor is not connected to the controller 10 d Heat type lt m E This parameter is available only when gas heating is selected see item 10 38 to 90 C 80 C WARNING FLMT can be used in parallel with an UL353 approved 100 to 194 F 176 F device but they do not replace such device NOTE The fan will not start if you raise FLMT above its maximum 11 d Fan limit C on On OF OF On Smart Fan is On see section 4 7 EE 12 d V Smart Fan SrA OF Smart Fan is Off 0 to 9 C 0 C Set the amount of temperature setback when the controller is placed in 13 Jr y Temperature setback Unac 0 to 16F 0F Unoccupied mode see section 5 6 Select between displaying the outdoor temperature or the indoor humidity level Displ h mperature d On OF On On isp ays the outdoor te pi u OF Displays the indoor humidity level NOTE To display the outdoor temperature the outdoor sensor must be connected 14 J af Outdoor temperature display ca Co conventional The humidifier will operate if the hu
15. imitations on how long an implied warranty lasts so the above limitation may not apply to you This warranty gives you specific legal rights and you may have other rights which vary by province or state If you have any questions about the product installation or operation or concerning the warranty contact us at the address shown below AIS 10 rue Amp re 705 Montrichard Saint Jean sur Richelieu Quebec 95500 Gonesse France J2X 5K8 Canada Tel 33 0 1 34 07 99 00 Tel 450 358 4600 Fax 33 0 1 34 07 99 19 Toll free 1 800 831 AUBE Email advaube comintes com Fax 450 358 4650 Email aube service honeywell com For more information on our products visit us at www aubetech com 400 280 007 B 5 24 07 10 10
16. ller see section 2 10 TH146 N U 2 1 Control Module CT280 3H3C Configure the control module according to your type of heating cool ing system using DIP switches on the back of the module Heat pump HVAC Heat Pump 0 Valve NWWNN e co Conventional DUREA 2 1 c WENN ee i Be NWES mie RUBE GE PURE DUBHA 7 co PURGE c ZE NURR nz cor PUAHA co Heat Pump B Valve Kee S PARRE ua co PAREN 272cc Weit Wee PEPEE BRRUR a s co Install the control module near the heating cooling system away from any heat source 2 2 User Console TH146 Install the console in a central location Avoid locations with air drafts e g top of staircase or air outlet or stagnant air behind a door Do not install the console on a wall hiding air ducts nor expose it to direct sunlight NOTE If this controller replaces an old thermostat any two of the wires that were connected to the thermostat can be used to connect the user console to the control module The maximum wiring length is 30 m 100 ft 400 280 007 B 5 24 07 1 10 Choose a location about 1 5 m 5 ft above the floor on an inside wall L
17. ly open NO dry contact Connect the con troller terminals DE and CC to the meter terminals yellow and red wires The contact closes when the outdoor temperature drops below the temperature setting on the meter When the contact is closed the heat pump is disabled and only the auxiliary heat can be used 2 1 0 Unoccupied Mode Input To use the unoccupied mode the controller requires a remote con trol device such as Aube s CT241 telephone controller equipped with a normally open NO dry contact placed between terminals UN and CC of the controller The unoccupied mode is activated when the contact closes See section 5 6 3 1 Configuration Switches To access the configuration switches loosen the captive screw under the console and separate the console from its base by pulling it from the bottom part 3 1 1 Backlight SW1 1 BL ON The screen is always backlit AUTO The screen is backlit only when a button is pressed The backlight remains on for 12 seconds 3 1 2 Access Mode SW1 2 INST Installer mode Gives access to all configuration parameters NOTE In installer mode the short cycle protection is disabled and the interstage delay is reduced to 1 minute USER User mode Gives access to configuration parameter 17 humidity setpoint or humidity offset only 3 1 3 Keypad Lock SW1 3 l The keypad is locked Settings cannot be changed O The keypad is unlocked 3 2 Software Configuration Place
18. midity is too low If the fan is not already On it will turn On at the same time as the humidi fier Co HE Fn Fn e HE heat The humidifier can operate only when heating is activated Fn fan The humidifier can operate as long as the fan is running whether heating is activated or not NOTE The humidifier is disabled when cooling is activated Humidifier 15 y d operating mode ac Allows you to set the humidity control to automatic mode On automatic The humidity level is automatically regulated by the con troller according to the outdoor temperature to avoid condensation or ice OF 8 A sat ne formation on windows while providing enough humidity for your comfort see item 17 OF manual The user manually sets the humidity level see item 17 16 a 4 Automatic humidity H AHT n adjustment HU RER Set the desired humidity level This parameter is available only when the Humidity setpoint 340 60 I humidity control is placed in manual mode see item 16 17 y y co H This parameter is available only when the humidity control is placed in auto Si E o matic mode see item 16 It allows the user to apply an offset to the auto Humidity offset 910 9 o matic humidity control For example the user can enter a negative offset if there is ice formation or condensation on the windows NOTE Only the humidity setpoint or humidity offset item 17 is available when the contr
19. oller is placed in user mode SW1 2 switch TH146 N U 400 280 007 B 5 24 07 8 10 d technologies TH146 N U User s Guide Non programmable H C Controller Emergency heat indicator System fault indicator Dual energy System operating i Fan operating mode selection mode selection Temperature adjustment Appears when the temperature setpoint is displayed E Auxiliary heat is On y E _t Indoor temperature Heating is On l 5 Cooling is On si LIE Outdoor temperature WI ef ey T or indoor humidity Fan is in ETA IL our continuous mode T rn ANTR System operating mode Unoccupied Humidifier modeisOn is On 5 1 System Operating Mode Press the Mode button to place the system in one of the following modes HEAT The system is in heating mode coo The system is in cooling mode The system is in automatic changeover mode The sys AUTO tem switches between heating mode and cooling mode to maintain the desired temperature OFF The system is off The system is in emergency heat mode Only auxiliary heating is used when there is a call for heat This mode EHEAT A applies only when the controller is connected to a heat pump equipped with auxiliary heating 0 2 Press the button to select the fan operating mode Fan Operating Mode e In automatic mode the fan runs only when heating or cooling is activated
20. oosen the captive screw under the console Detach the console from its base by pulling the bottom section Secure the base using the wall anchors and screws 0000 Connect the console to controller terminals TH and TH no polarity 2 3 Heating Cooling System The terminals used to connect the heating cooling system depend on the type of system See the appropriate wiring table on page 4 2 4 RC845 Relay If you have an add on installation you might need an RC845 relay to connect the furnace auxiliary heat and its fan to the controller Install the relay near the control module and connect the wires as follows e relay terminals W G and C to controller terminals W1 G and C e relay terminals T and T to the appropriate furnace terminals T and T oil TH and TH gas R and W electric NOTE Refer to the relay s installation instructions for more details If you have a 3H1C or 4H2C heat pump a second RC845 relay might be required to connect the second auxiliary heat 2 5 Humidifier Connect the humidifier in series with the power supply between controller terminals H and H dry contact 2 6 Dehumidifier Air Exchanger Connect the dehumidifier or air exchanger in series with the power supply between controller terminals D and D dry contact 2 1 Outdoor Sensor AC144 03 The outdoor sensor is required for the following e outdoor temperature display balance points heat pumps only see sec
21. the console in Installer mode INST using the SW1 2 switch on the back of the console Press the Mode button for 3 seconds to access the configuration menu see page 8 The first menu item parameter is displayed To view another menu item briefly press the Mode button To modify a parameter press either button To exit the configuration menu press eOo00 Return the console to User mode USER 400 280 007 B 5 24 07 2 10 4 1 Automatic Heating Cooling Changeover With automatic heating cooling mode changeover there s no need to adjust the controller at every change of season or weather condi tion The controller switches automatically between heating mode and cooling mode to maintain the desired temperature The mode changeover is triggered as follows s The controller switches to cooling mode when the indoor tem perature is higher than the setpoint by more than 1 5 C 2 5 F for 15 minutes s The controller switches to heating mode when the indoor tem perature is lower than the setpoint by more than 1 5 C 2 5 F for 15 minutes 4 2 Balance Points heat pumps only Balance points are used to disable the heat pump or the auxiliary heating when the outdoor temperature is below or above a set tem perature e When the outdoor temperature is below the balance point low bP L the heat pump is disabled and only auxiliary heating can be used see page 8 item 2 e When the outdoor temperature
22. tion 4 2 e defrost point heat pumps only see section 4 3 e automatic humidity control see section 5 5 When installing the sensor observe the following guidelines e Avoid locations where the sensor can be covered with snow or exposed to direct sunlight e Avoid air outlets and concealed chimneys or stove pipes Install the sensor using its mounting clip and connect it to controller terminals OS and CS no polarity NOTE The maximum wiring length is 30 m 100 ft 2 8 Plenum Sensor AC146 410 The plenum sensor is required for the following e low temperature limit inside the plenum HVAC only e high temperature limit inside the plenum HVAC only e fan limit if gas heating is used HVAC only e high pressure protection during defrost cycle This protection is generally needed for add on installations only It is not needed if the heat pump is not connected to the controller terminal WW TH146 N U Install the sensor on the side of the plenum and position it such that its aperture faces the air flow Connect the sensor to controller terminals PS and CS no polarity For more information refer A to the instructions provided with the sensor I aro NOTE The maximum wiring length is 20 m 100 l t boe 2 9 Dual energy Input NOTE The dual energy input can be used only with a heat pump equipped with auxiliary heat The dual energy input can be connected to the dual register meter equipped with a normal
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