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D 545 - 06/05

D 545

06/05

tekmarNet

4 Thermostat 545

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Data

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Control settings

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operation

•

tN4 Compatible

•

Automatic Heat / Cool Switchover

•

2 Auxiliary Temperature Sensor Inputs

•

Pulse Width Modulation

•

Programmable Setback and Setup Scheduling

•

Scenes

•

Cooling Group

•

Radiant Base Load

The tekmarNet

4 thermostat 545 operates two stages of heating equipment, one stage of cooling equipment, and one fan.

The fan operation includes logic to operate ventilation. The 545 can operate as a stand alone device, or communicate with
a group of tekmarNet

4 thermostats.

Introduction

Features

Y1 Rc G1 G1

tN4

Com

Rh1

Rh2 W2

Summary of Contents for 545 tekmarNet 4

Page 1: ...chure Control settings and sequence of operation 5 tN4 Compatible Automatic Heat Cool Switchover 2 Auxiliary Temperature Sensor Inputs Pulse Width Modulation Programmable Setback and Setup Scheduling Scenes Cooling Group Radiant Base Load The tekmarNet 4 thermostat 545 operates two stages of heating equipment one stage of cooling equipment and one fan The fan operation includes logic to operate ve...

Page 2: ...witches Y1 Rc G1 G1 R C tN4 S1 S2 Com W1 Rh1 Rh2 W2 tN4 System Control DIP Switch 2 A tN4 System Control is a control not a thermostat that the 545 thermostat connects to through the tN4 bus All tN4 compatible Outdoor Reset Modules are tN4 System Controls If the thermostat is connected to a tN4 System Control set the tN4 System Control DIP switch to tN4 System Control If the thermostat is not conn...

Page 3: ...Misc menu 3 Use the Item button to select the Access menu item 4 Use the Up and Down button to select the required Access Level Display Item Field Displays an abbreviated name of the selected item Number Field Displays the current value of the selected item Status Field Displays the current status of the control s inputs outputs and operation Menu Field Displays the current menu Symbols Descriptio...

Page 4: ...e Up or Down button to adjust the setting Default Item To set the default item in the View Menu display the item for more than five seconds After navigating menus the display reverts back to the default item after 60 seconds of button inactivity Copy Settings To save time in setting thermostats you can copy the settings from one tN4 thermostat to a second tN4 thermostat Refer to the COPY item in t...

Page 5: ... or Sensor 1 or 2 is set to Room if no recent message 58 to 212 F 50 0 to 100 0 C SEC LTD USER INST ADV OUTDOOR SECTION A Current temperature at the outdoor sensor Note This item is only available when an outdoor sensor is connected to the tN4 network 58 to 212 F 50 0 to 100 0 C SEC LTD USER INST ADV FLOOR SECTION A Current floor temperature Note This item is only available when Sensor 1 or 2 is s...

Page 6: ...YES NO Default NO USER INST ADV CLEAR FILTER SECTION J Indicates when to reset the air filter timer Note This item is only available when Filter is set to ON the air filter timer has expired and the Fan Mode is set to 1 or 2 OFF HEAT AUTO COOL Default AUTO USER INST ADV MODE OF OPERATION SECTION B Mode of operation of the thermostat or cool group 40 to 95 F 4 5 to 35 0 C LTD USER INST ADV SET HEAT...

Page 7: ...Floor At the Limited Access Level you can only adjust the temperature 3 F 1 5 C from the last setting Wake Default 70 F 21 0 C UnOccupied Default OFF Occupied Default 70 F 21 0 C Sleep Default OFF 40 to 122 F 4 5 to 50 0 C Default 85 F 29 5 C ADV FLOOR MAXIMUM SECTION F Maximum floor temperature Note This item is only available when Sensor 1 or 2 is set to Floor OFF ROOM FLOR Floor REM Remote Defa...

Page 8: ...tem Control is delayed to allow a first stage heat thermal motor zone valve to open Select On for thermal motor select Off for zone pump or motorized zone valve Note This item is only available when the H1 Terminal item is set to CTRL HRF1 HRF2 Fan Coil Convector Radiator or Baseboard NONE CTRL HRF1 HRF2 COIL CONV RAD BASE OTHR FURN Default CTRL INST ADV HEAT 2 TERMINAL SECTION E Select the type o...

Page 9: ...is thermostat is not a cool group member Note This item is only available when the thermostat is connected to a tN4 network Cool Master is set to NONE and the Cool Stage is set to NONE NONE 1 Default 1 INST ADV COOL STAGES SECTION G Select the number of cooling stages Select None if cooling is not used 0 30 to 6 00 min Default 2 00 ADV MINIMUM COOL RUN TIME SECTION G Select the minimum running tim...

Page 10: ...e minimum percentage of time the ventilation fan operates during each event Auto operates with heat or cool On operates continuously sets a minimum On time for each cycle Note This item is only available when the Fan Mode is set to 1 or F1 Vent is set to On Wake UnOccupied Occupied Sleep OFF 70 to 180 F OFF 21 0 to 82 0 C Default 110 F 43 0 C ADV HEAT COIL MINIMUM SECTION I Set the minimum coil te...

Page 11: ...1 0 C Default 60 F 15 5 C ADV COOL PURGE FAN SECTION I Setthemaximumducttemperature Thispurgescooling from the coil after the call for cooling is removed Note This item is only available when Cool Stage is set to 1 Sensor 2 is set to Duct and Fan Mode is set to 1 or 2 OFF 200 to 2000 hr Default 500 hr INST ADV FILTER SECTION J Set the number of hours Fan 1 should operate before you replace the fil...

Page 12: ...ts Note This item is only available when Cool Stage is set to 1 HEAT COOL H C OFF Default H C INST ADV OPTIMUM START STOP SECTION M Select whether to use Optimum Start Stop for heating cooling or both Note This item is only available when either a heating schedule and or a cooling schedule is selected Lo 2 3 Hi Default Hi ADV RADIANT BASE LOAD SECTION P Select the radiant heating load relative to ...

Page 13: ...o 59 Default 12 00 AM USER INST ADV CLOCK MINUTES SECTION K Set the minutes 12 00 AM to 11 59 PM or 00 00 to 23 59 Default 12 00 AM USER INST ADV CLOCK HOURS SECTION K Set the hours SUNDAY WEDNESDAY SATURDAY Default SUNDAY USER INST ADV DAY OF THE WEEK SECTION K Set the day of the week ON to OFF Default OFF INST ADV DAYLIGHT SAVINGS TIME SECTION K Selects whether to use Daylight Savings Time The t...

Page 14: ...ay PERM1 PERM Away 2 PERM UnOcc 3 PERM 4 PERM5 TMPY Occ 6 TMPY7 TMPY 8 Default Occ PERM 1 USER INST ADV SELECT SECTION N Select the scene for the building Note Only Occ and AWAY are available when either no schedule is selected or the SCENE menu is set to OFF INF 1 to 180 days Default INF USER INST ADV AWAY HOLD SECTION O Set the number of days for the Permanent Away 2 scene When the scene is sele...

Page 15: ...ary 7 scene The scene lasts for 4 hours before reverting to the previous permanent scene Note This item is only available when SCENE menu is set to ON and a schedule has been selected Schd8 Wake8 Occ8 UnOcc8 Sleep8 Away8 Default SCHD INST ADV SET TEMPORARY 8 SECTION N Select an action for the Temporary 8 scene The scene lasts for 8 hours before reverting to the previous permanent scene Note This i...

Page 16: ...schedule is only used by this thermostat select ZONE If the schedule is shared with other thermostats select MST1 to MST4 If the schedule is set on another thermostat select MBR1 to MBR4 Note This item is only available when the HEAT SCH is set to either NONE or MBR1 to MBR4 This item can be viewed in the USER and INST access levels but can only be adjusted in the ADV access level 24 hr 5 2 5 11 7...

Page 17: ...o 5 2 or 5 11 Wake Default 6 00 AM UnOccupied Default 8 00 AM Occupied Default 6 00 PM Sleep Default 10 00 PM to 11 50 PM or to 23 50 PM USER INST ADV SATURDAY AND SUNDAY SECTION L Select the times for the scheduled events Note This item is only available when the Schedule Type is set to 5 2 Wake Default 6 00 AM UnOccupied Default 8 00 AM Occupied Default 6 00 PM Sleep Default 10 00 PM to 11 50 PM...

Page 18: ... to 7dAY Wake Default 6 00 AM UnOccupied Default 8 00 AM Occupied Default 6 00 PM Sleep Default 10 00 PM to 11 50 PM or to 23 50 PM USER INST ADV TUESDAY SECTION L Select the times for the scheduled events Note This item is only available when the Schedule Type is set to 7dAY Wake Default 6 00 AM UnOccupied Default 8 00 AM Occupied Default 6 00 PM Sleep Default 10 00 PM to 11 50 PM or to 23 50 PM ...

Page 19: ...HEDULE MENU Item Field Range Access Description 76 to 149 F 60 0 to 65 0 C LTD USER INST ADV OUTDOOR HIGH SECTION A Records the highest outdoor temperature Press Up and Down buttons to clear Note This item is only available when an outdoor sensor is connected to the tN4 network 76 to 149 F 60 0 to 65 0 C LTD USER INST ADV OUTDOOR LOW SECTION A Records the lowest outdoor temperature Press Up and Do...

Page 20: ...east one active room sensor 0 to 9999 hr INST ADV HEAT 1 RUN TIME SECTION F Records the number of hours that first stage heat runs Press Up and Down buttons to clear 0 to 9999 hr INST ADV HEAT 2 RUN TIME SECTION F Records the number of hours that second stage heat runs Press Up and Down buttons to clear Note This item is only available when the thermostat is used for two stage heating 0 to 9999 hr...

Page 21: ...anual OFF ON Default OFF ADV HEAT 2 RELAY Manually turn on Heat 2 Relay for up to 5 minutes Note This item is only available when Heat 2 Terminal is not set to None and Test Mode is manual OFF ON Default OFF ADV COOL RELAY Manually turn on Cool Relay for up to 5 minutes Note This item is only available when Cool Stage is set to 1 and Test Mode is manual OFF ON Default OFF ADV FAN RELAY Manually tu...

Page 22: ... 1 F increments 3 0 to 3 0 C in 0 1 C increments Default 0 0 F ADV OFFSET SECTION Q Fine tune the current room temperature Adjustments are in tenths of a degree bus 01 bus 24 DEF Default INST ADV COPY SETTINGS SECTION V Copy settings from another thermostat to this thermostat 1 Select the address of the thermostat to copy from Select DEF to load the factory default settings 2 Wait for 3 seconds an...

Page 23: ...USER INST ADV TYPE Product number of this thermostat Hold the Up button to view the software version Misc Miscellaneous Menu 2 of 2 After the last item the control returns to the first item in the menu MISC MENU The thermostat s Test menu allows you to test each relay While testing the word USERTEST is displayed 1 Set the Access Level to Advanced See the Access Levels section for detailed instruct...

Page 24: ...in the zone that the thermostat controls Floor temperature operates in a range between the Floor Minimum and Floor Maximum settings Locate the Floor Minimum and the Floor Maximum settings in the Adjust Menu Remote Sensor A single remote sensor can be connected to the thermostat The temperature measured by a remote sensor does not affect the heating and cooling operation and is only used for displa...

Page 25: ...ary Temperature Adjustment You can temporarily adjust the temperature above or below the scheduled temperature To temporarily adjust the temperature 1 Use the Up or Down button to adjust the temperature This action holds the temperature above or below the scheduled temperature for the period of time designated in the Temporary Zone Hold setting The default hold time is 3 hours In Heat Mode each pr...

Page 26: ...s the thermostat to adopt the tN4 System Control s terminal unit setting Hydronic Radiant Floor 1 HRF1 Terminal type for a heavy or high mass hydronic radiant floor system This type of a hydronic radiant floor is embedded in either a thick concrete or gypsum pour This heating system has a large thermal mass and is slow acting Hydronic Radiant Floor 2 HRF2 Terminal type for a light or low mass hydr...

Page 27: ...nsor the thermostat calculates an on time for the Heat 1 relay to satisfy the floor sensor and an on time to satisfy the room sensor The Heat 1 relay operates for the longer of these two on times During light heating loads overheating can occur due to the minimum floor temperature setting During heavy heating loads the maximum floor temperature setting limits the on time of the Heat 1 relay In thi...

Page 28: ...relay In this situation the Heat 2 relay may be on while the Heat 1 relay is off Note During light heating loads overheating can occur due to the minimum floor temperature requirements Zone Group Heat 1 Pump OFF Zone Manager Zone Group DIP On Operated by Zone Manager Operated by tN4 System Control Heat 1 Pump On Zone Manager Zone Group DIP OFF Zone Group 1st Stage 2nd Stage Mix Water Temperature B...

Page 29: ...p must be satisfied for heating before the interlock time allows the thermostat to automatically switch over to cooling If any heating is required cooling is terminated and heating resumes If set to cooling the operation is reversed The thermostat can operate with other thermostats on a tN4 network in a cool group When operating as a cool group the air temperature readings of all the thermostats i...

Page 30: ...alled Operation During a call for heating the fan turns on after the coil temperature exceeds the Heat Coil Minimum temperature setting During a call for cooling the fan turns on after the coil temperature falls below the Cool Coil Maximum temperature setting After Heating the fan turns off after the Fan Purge time setting expires After Cooling the fan immediately turns off Duct Sensor Installed O...

Page 31: ...F 3 C the fan shuts off The thermostat records the number of hours that the Fan contact runs When Fan 1 run time exceeds the Filter time then a Filter symbol displays Once you replace the filter the Filter timer can be reset using the Clear Filter item To reset the Filter item go to the Adjust menu and select the Clear Filter item Time Clock Section K The thermostat has a built in time clock to al...

Page 32: ...network Master schedules simplify installation since one master schedule may be used by multiple devices To create a master schedule 1 Assign a thermostat as a schedule master by setting the Heat Schedule or Cool Schedule item in the Schedule menu to Master MST 1 to 4 Once a thermostat is the master schedule a clock symbol and number appear on the display in the View menu The number identifies the...

Page 33: ... use the scene function go to the Scene menu and set the Scene setting to On Scenes are a method of changing the temperature throughout an entire building from a single thermostat A thermostat must be using a schedule to participate with Scenes A permanent scene remains in place until another scene is selected When a temporary scene is selected Scenes 6 7 8 a timer counts down and when it times ou...

Page 34: ...tairs thermostats Scene Permanent 1 is set to Schedule Scene Temporary 7 is set to Occupied To set the temperature while the occupants are away use the PermanentAway2scene Thisscenechangesallthermostats on the network to the Away temperature setting If there is an Outdoor Reset Module on the tN4 communication bus the boiler no longer responds to domestic hot water calls for heat Setpoint demands c...

Page 35: ...st menu and set the H1 Load item In the Hi setting the radiant floor heating tries to fully heat the entire heating load In the Lo setting the radiant floor heating only makes up a small portion of the overall heating load The thermostat also includes a 2 and a 3 setting that provides intermediate steps between the Lo and Hi settings Offset Section Q Warm Weather Shut Down Section R This thermosta...

Page 36: ...access level must be set to Advanced before checking the settings in the Scene menu SCHEDULE ERROR The thermostat failed to read the Schedule menu settings from memory and has reloaded the factory default settings The thermostat continues to operate while displaying this error Note To clear the error the access level must be set to Advanced before checking the settings in the Schedule menu Error M...

Page 37: ...set to the same address The thermostat continues to operate with this error but does not communicate with the tN4 bus To clear this error select an unused address This can be done automatically by setting the Address item to Auto DEVICE LIMIT You have installed more than 24 devices on the tN4 bus You must remove the additional devices and move them to a different bus if possible DIP SWITCH 2 MODE ...

Page 38: ...her Floor sensors are available and the Floor Maximum is not set to Off then the H1 contact no longer operates Locate and repair the problem as described in the Data Brochure D070 Once the error is corrected press any button to clear the error SENSOR 2 OPEN CIRCUIT Due to an open circuit the thermostat failed to read Sensor 2 The thermostat displays the error and continues to operate unless No oth...

Page 39: ...no longer detect its schedule master Check the communication connections for open or short circuits Once the schedule master has been detected the error message clears ROOM HOT WARNING The room temperature has exceeded the Room Hot setting in the Monitor menu ROOM COLD WARNING The room temperature has fallen below the Room Cold setting in the Monitor menu Error Messages 4 of 4 The thermostats s ex...

Page 40: ...kmar during the warranty period This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defective Product or to reinstall the repaired or replacement Product all such costs and expenses being subject to Purchaser s agree ment and warranty with its customers Any representations or warranties about the Products made by Purchaser to its customers which are diffe...

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