Installation & Operation Manual
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1 Snow Melting Control 654 Installation & Operation Manual 654_D 06/13 Snow Melting Replaces: New Introduction The Snow Melting Control 654 is designed to operate electric or hydronic equipment to melt snow or ice from any surface including driveways, walkways, patios, business entrances, parking ramps, loading docks, hospital entrances, helipads or car wash bays. The surface temperature for snow melting is controlled automatically to reduce operating energy costs. The 654 has an automatic start and stop function when used with the Snow/Ice Sensor 090 or 094. Automatic start with a timed stop is available when used with the Snow Sensor 095. The 654 can operate a dedicated hydronic boiler or a mixing device. Isolation relays are required to operate line voltage pumps. Electric systems require a separate GFCI and electrical relay contactor. Features Automatic Snow / Ice Detection Supports Both Inslab & Retrofit Aerial Sensors Manual Start With Timer Programmable Schedule tekmarnet Communication Compatible Warm Weather Shut Down Cold Weather Cut Out Idling Snow Melt Zoning With Priority Tandem Snow / Ice Detection Slab Protection Storm EconoMelt Manual Override Snow Melt Zone Tracking Scenes Away Key Exercising Alert Output 1 of _D - 06/13
2 Table of Contents Important Safety Information...3 Installation...4 Preparation... 4 Physical Dimensions... 4 Installation Location... 4 Rough-In Wiring... 4 Sizing the Transformer... 5 Control Wiring... 5 Sensor Wiring... 7 Testing the Sensor Wiring... 8 Testing the Control Wiring... 8 Manual Override - Maximum Heat... 9 Manual Override - Test... 9 Manual Override - Purge... 9 Manual Override - Off... 9 Switch Settings...9 Interface...10 Display Operation Field Status Field Symbols Programmable Settings...11 Programming Menus Access Levels and Access Level Lock View Menu Set Temp Menu Time Menu Schedule Menu Display Menu Scene Menu Monitor Menu Toolbox Menu Override Menu System Menu Boiler Menu Mix Menu tekmarnet Menu Sequence of Operation...25 Snow Melting Overview Slab Temperature Control Melt Operation Melt - Manual Start and Timed Stop Melt - Automatic Start and Stop Melt - EconoMelt Melt - Automatic Start and Timed Stop Melt - Tracked Start and Stop Melt - Scheduled Start and Stop Additional Melting Time Idle Operation Storm Operation Warm Weather Shut Down Cold Weather Cut Out Away Scene Programmable Schedules Time Clock Snow Melt Zones and Priority Slab Protection Application Modes Electric Operation Pulse Width Modulation Operation Boiler Operation Mixing Operation Tandem Snow / Ice Detection Exercising Alert Relay Pump Post Purge Melt and Storm Groups Switch Setup Troubleshooting Error Messages Frequently Asked Questions Job Record...42 Technical Data Limited Warranty and Product Return Procedure Getting Started Congratulations on the purchase of your new Snow Melting Control! This manual covers the complete installation, programming and sequence of operation for this control. You will also find instruction on testing, commissioning, and troubleshooting the control and system that it operates _D - 06/13 2 of 44
3 Important Safety Information It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. tekmar is not responsible for damages resulting from improper installation and/or maintenance. To avoid serious personal injury and damage to the equipment: Read Manual and all product labels BEFORE using the equipment. Do not use unless you know the safe and proper operation of this equipment. Keep this Manual available for easy access by all users. Replacement Manuals are available at tekmarcontrols.com Disconnect all power before opening the control. It is the installers responsibility to ensure that this control is safely installed according to all applicable codes and standards. Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury or death. This electronic control is not intended for use as a primary limit control. Other controls that are intended and certified as safety limits must be placed into the control circuit. Do not attempt to service the control. There are no user serviceable parts inside the control. Attempting to do so voids warranty. Radio Frequency Interference The installer must ensure that this control and its wiring are isolated and/or shielded from strong sources of electromagnetic noise. Conversely, this Class B digital apparatus complies with Part 15 of the FCC Rules and meets all requirements of the Canadian Interference-Causing Equipment Regulations. However, if this control does cause harmful interference to radio or television reception, which is determined by turning the control off and on, the user is encouraged to try to correct the interference by re-orientating or relocating the receiving antenna, relocating the receiver with respect to this control, and/or connecting the control to a different circuit from that to which the receiver is connected. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. 3 of _D - 06/13
4 Installation Preparation Tools Required tekmar or jeweller screwdriver Needle-nose Pliers Phillips head screwdriver Wire Stripper Materials Required AWG LVT Solid Wire (Low Voltage Connections) tekmar 24 V (ac) Transformer 009 Physical Dimensions Front View Side View Mounting Base 29/32" (23 mm) 1-7/8" (47 mm) 9/16" (14 mm) CL CL 2-1/2" (64 mm) 13/16" (20 mm) 5" (127 mm) 4" (102 mm) 3/4" (19 mm) 3-1/4" (83 mm) 654 No Power Aux Ht R C tn4 Mod Brn Yel Blu Red Blk Out/ Sup Com + Slab Com Bret CL 3-1/4" (82 mm) Installation Location 15/16" (23 mm) 1-1/2" (38 mm) When choosing the location for the control, consider the following: Interior Wall. Keep dry. Avoid potential leakage onto the control. Relative Humidity less than 90%. Non-condensing environment. No exposure to extreme temperatures beyond -4 to 122 F (-20 to 50 C). No draft, direct sun, or other cause for inaccurate temperature readings. Away from equipment, appliances, or other sources of electrical interference. Easy access for wiring, viewing, and adjusting the display screen. Approximately 5 feet (1.5 m) off the finished floor. The maximum length of wire is 500 feet (150 m). Strip wire to 3/8" (10 mm) for all terminal connections. Use standard 8 conductor, 18 AWG wire. Rough-In Wiring Low Voltage Wiring Each cable must be pulled from the equipment to the control s plastic enclosure. All low voltage wiring connections enter the enclosure through the square knockout on the rear. It is recommended to label each cable for easy identification. All low voltage wires are to be stripped to a length of 3/8" (9 mm) to ensure proper connection to the control. Pull four conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment: Snow Sensor 095 Pull five conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment: Snow / Ice Sensor 090 or _D - 06/13 4 of 44 Pull two conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment: 24 V (ac) power from transformer Outdoor temperature sensor Supply sensor (if applicable) On/off boiler (if applicable) Modulating boiler 0-10 V (dc) or 4-20 ma (if applicable) Mixing valve or mixing injection pump 0-10 V (dc) or 4-20 ma (if applicable) Boiler return temperature sensor (if applicable) Alert output (if applicable) tekmarnet 4 communication to other devices
5 Sizing the Transformer The control requires an external transformer. A tekmar Transformer 009 can supply up to 40 VA, and includes an in-line fuse to protect the transformer and control. The total power capacity of the power supply should be larger than the total load of all the devices connected to the control. This total load must not exceed 100 VA. Control Wiring See Application Brochure 654_A for specific application wiring diagrams. Snow / Ice Sensor Snow and Slab Sensor Snow / Ice Sensor 090 or 094 Snow Sensor 095 Slab Sensor 072 or 073 Snow Sensor 095 Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret Outdoor, Supply and Boiler Return Sensor Modulating Output and tn4 Communication Modulating Boiler Mixing Valve or Mixing Injection Pump 0-10 V (dc) Signal + Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret Supply Sensor 082 Outdoor Sensor 070 or Boiler Return Sensor 082 tn4 C tekmarnet 4 Communication Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret 5 of _D - 06/13
6 tn4 Wiring Center or Zone Manager Alert Relay Output No Power Aux Ht R C tn4 Mod Brn Yel Blu Red Blk Out/ Sup tn4 C R W tn4 C R W + Slab Com Bret Zone 1 Zone 2 tn4 Wiring Center or Zone Manager Alert Equipment Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret Transformer and Relays Transformer 009 L N R C Relay Relay Aux Ht R C No Power tn4 Mod Brn Yel Blu Red Blk Out/ Sup + Slab Com Bret T T System Pump On/Off Boiler G N L 115 V (ac) _D - 06/13 6 of 44
7 Sensor Wiring Mounting the Outdoor Sensor Notice: The temperature sensor (thermistor) is built into the sensor enclosure. Remove the screw and pull the front cover off the sensor enclosure. The outdoor sensor can either be mounted directly onto a wall or a 2" x 4" electrical box. When the outdoor sensor is wall mounted, the wiring should enter through the back or bottom of the enclosure. Do not mount the outdoor sensor with the conduit knockout facing upwards as rain could enter the enclosure and damage the sensor. In order to prevent heat transmitted through the wall from affecting the sensor reading, it may be necessary to install an insulating barrier behind the enclosure. The outdoor sensor should be mounted on a wall which best represents the heat load on the building (a northern wall for most buildings and a southern facing wall for buildings with large south facing glass areas). The outdoor sensor should not be exposed to heat sources such as ventilation or window openings. The outdoor sensor should be installed at an elevation above the ground that will prevent accidental damage or tampering. Sensor with rear entry wiring Sensor with bottom entry wiring Sensor mounted onto 2" x 4" electrical box Wiring the Outdoor Sensor Connect 18 AWG or similar wire to the two terminals provided in the enclosure and run the wires from the outdoor sensor to the control. Do not run the wires parallel to telephone or power cables. If the sensor wires are located in an area with strong sources of electromagnetic interference (EMI), shielded cable or twisted pair should be used or the wires can be run in a grounded metal conduit. If using shielded cable, the shield wire should be connected to the Com or Com Sen terminal on the control and not to earth ground. Follow the sensor testing instructions in this brochure and connect the wires to the control. Replace the front cover of the sensor enclosure. Wires from outdoor sensor to control s outdoor sensor and sensor common terminals Sensor is built into the enclosure Mounting the Universal Sensor NOTICE: These sensors are designed to mount on a pipe or in a temperature immersion well. The Universal Sensor should be placed downstream of a pump or after an elbow or similar fitting. This is especially important if large diameter pipes are used as the thermal stratification within the pipe can result in erroneous sensor readings. Proper sensor location requires that the fluid is thoroughly mixed within the pipe before it reaches the sensor. Strapped to Pipe The Universal Sensor can be strapped directly to the pipe using the cable tie provided. Insulation should be placed around the sensor to reduce the effect of air currents on the sensor measurement. 7 of _D - 06/13
8 Immersion Well If a Universal Sensor is mounted onto 1" (25 mm) diameter L type copper pipe, there is approximately an 8 second delay between a sudden change in water temperature and the time the sensor measures the temperature change. This delay increases considerably when mild steel (black iron) pipe is used. In general, it is recommended that a temperature well be used for steel pipe of diameter greater than 1-1/4" (32 mm). Temperature wells are also recommended when large diameter pipes are used and fluid stratification is present. Conduit Connection The Universal Sensor and Universal Sensor Enclosure 080 (sold separately) are specifically designed to mount onto a 3/8" (10 mm) ID temperature well that is supplied with an end groove. To install the well, plumb a T into the pipe and fix the well into the T. The 080 enclosure has a 7/8" (22 mm) back knockout that must be removed and fitted over the temperature well. The universal sensor is then inserted into the well and the retaining clip supplied with the enclosure is snapped onto the well end groove. If the well has a threaded end, the installer must supply a standard threaded conduit retaining ring. The two wires from the sensor are connected to the terminal block provided in the enclosure. The other side of the terminal block is used to connect wires from the control. Retaining Clip Universal Sensor Sensor Well Universal Sensor Bottom of Enclosure 080 Cable Tie Testing the Sensor Wiring A good quality test meter capable of measuring up to 5,000 kω (1 kω = 1000 Ω) is required to measure the sensor resistance. In addition to this, the actual temperature must be measured with either a good quality digital thermometer, or if a thermometer is not available, a second sensor can be placed alongside the one to be tested and the readings compared. First measure the temperature using the thermometer and then measure the resistance of the sensor at the control. The wires from the sensor must not be connected to the control while the test is performed. Using the chart below, estimate the temperature measured by the sensor. The sensor and thermometer readings should be close. If the test meter reads a very high resistance, there may be a broken wire, a poor wiring connection or a defective sensor. If the resistance is very low, the wiring may be shorted, there may be moisture in the sensor or the sensor may be defective. To test for a defective sensor, measure the resistance directly at the sensor location. Do not apply voltage to a sensor at any time as damage to the sensor may result. Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance F C F C F C F C , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Testing the Control Wiring Testing the Power Remove the front cover from the control. 2. Use an electrical test meter to measure (ac) voltage between the R and C terminals. The reading should be 24 V (ac) +/ 10%. 3. Install the front cover _D - 06/13 8 of 44
9 Testing the Relay Outputs The control includes an Override menu to check if the control s relays are operating and that the control is wired correctly to the snow melting equipment. Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu. Step 4: Select Manual Override to Hand. Step 5: For hydronic systems, set System Pump to On. The system pump should now be operating. Manual Override - Maximum Heat In hydronic application modes, the control includes a Maximum Heat operation where the control operates the snow melting system to maintain the maximum allowed heating setpoints. This allows testing of the snow melting system during warm weather. Manual Override - Test When operating an electric snow melting system, the control includes a Test operation where the electrical heating cables can be energized for 10 minutes after which the control resumes normal operation. This allows testing of the electric snow melting system during warm weather. Step 6: Set Heat Relay to On. The boiler or electric heating cables should start heating. Step 7: For modulating boilers change the Boiler Percent from 0 to 100%. The boiler should be firing. Step 8: For a mixing valve or mixing injection pump, change the Mix Percent from 0 to 100%. The mixing valve should open or the mixing injection pump should increase speed. Step 9: Select the Override Time after which the control resumes normal operation. Step 10: Exit the Manual Override by selecting Auto. Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu. Step 4: Select Manual Override to Max. Step 5: Select the Maximum Heat Time after which the control resumes normal operation. Step 6: Exit the Manual Override by selecting Auto. Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu. Step 4: Select Manual Override to Test. Step 5: Exit the Manual Override by selecting Auto. Manual Override - Purge When operating a hydronic snow melting system, it is necessary to purge and bleed all air out of the system. The control includes a Purge operation where the System Pump as well as pumps operated by the tekmarnet system are all turned on to assist in purging air from the system. Manual Override - Off The snow melting system can be manually turned off and the control remains off until manually changed back to Auto. This allows the installer or end user to permanently disable the snow melting system without removing power from the control. Switch Settings Switch Settings H1220A Lock ON 1 2 Unlock Unused Snow Melting Control 654 tekmarnet Electric or Hydronic Boiler/Mixing Power: 24 V (ac) ±10%, 60 Hz, Class 2, 16 VA standby, 100 VA fully loaded Relays: 24 V (ac) 2 A, 3.5 A combined Designed and assembled in Canada Meets Class B: ICES & FCC Part 15 Back of Control Switch Position Action 1 2 ON OFF ON OFF Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu. Step 4: Select Manual Override to Purge. Step 5: Select the Maximum Purge Time after which the control resumes normal operation. Step 6: Exit the Manual Override by selecting Auto. Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu. Step 4: Select Manual Override to Off. Step 5: Exit the Manual Override by selecting Auto. LOCK ACCESS LEVEL The control is locally locked and the access level cannot be changed. Set to Lock when installation has been completed. UNLOCK ACCESS LEVEL The control is unlocked and the access level may be changed. Go to the Toolbox menu to change the access level. Set to Unlock during the installation process. Note: tekmarnet system controls include a Global Lock that locks all connected snow melt controls, and thermostats. Set the tekmarnet system control to unlock to allow access level adjustment on all connected devices. Not used Not used 9 of _D - 06/13
10 Interface Display Status Field Operation Field Touch to display Run Time, Outdoor & Slab Temperature Touch to quickly enter the View menu Touch to turn system off while away Touch to Melt or Stop Touch to adjust settings Home Button ENTER Touch to go to the next setting Home Button Return to the Home Screen Press and hold for 3 seconds to access the programming menus. Operation Field MELT IDLE System is melting snow or ice. System is idling. STRM OFF System is in storm operation. System is off. Status Field WWSD Warm Weather Shut Down. The slab is naturally warm enough to melt snow or ice. PEND Pending. The system has detected water but it is too cold to operate or the schedule is in Idle or Off. CWCO Cold Weather Cut Out. Too cold to melt. WAIT Zone priority in effect. Zone must wait until higher priority zone finishes melting. TIMED Timed melting operation. System operates until time has elapsed. SENSOR Tandem 090 sensor. WARM AWAY Slab is warming up to the melting temperature. Away scene. No melting until the away scene is exited. TRACK This zone tracks the melting operation of zone 1. Symbols HEAT ON Heat is turned on. tekmarnet Communication is present. WARNING SYMBOL Indicates an error is present. ARROWS Adjust the displayed setting _D - 06/13 10 of 44
11 Programmable Settings Programming Menus Press and hold the Home button for 3 seconds to enter the programming menus. The control returns to the last programming menu previously used. Press and hold for 3 seconds to access the programming menus. Select a Programming Menu Touch NEXT to advance (clockwise in above illustration) to the next menu. Touch BACK to go backwards (counterclockwise in above illustration) through the menus. Touch ENTER to enter a menu. Setting Items Touch or arrow to adjust the setting if required. Touch NEXT ITEM to advance to the next item within the menu. Touch BACK ITEM to go backwards to the previous item within the menu. To return to the parent menu after changing a setting, press and release the Home button. To return to the Home screen, press and release the Home button twice or wait 30 seconds to automatically return to the Home screen. Access Levels and Access Level Lock The control is shipped pre-programmed with common settings. The control has an access level that allows full access to all settings and a access level that restricts the number of settings available. The control defaults to the access level after 12 hours of operation. Notice: tekmarnet system controls include a Global Lock that locks all connected snow melting controls and thermostats. Set the tekmarnet system control to unlock to allow access level adjustment on all connected devices. To change to the access level: In the Toolbox menu, locate Access Adjust the access level to by pressing the up or down button. This will permit setting changes to the control. 11 of _D - 06/13
12 View Menu (1 of 2) The View menu items display the current operating temperatures and status information of the system. Item Field Range Access Description Set to 1 to 12 SNOW ZONE The snow melt zone number on the tekmarnet system. Conditions: tekmarnet communication available., -76 to 149 F (-60 to 65 C), -76 to 149 F (-60 to 65 C) -76 to 149 F (-60 to 65 C) DRY or WET ---, 70 to 200 F (21.0 to 93.5 C) ---, 70 to 200 F (21.0 to 93.5 C) -58 to 212 F (50.0 to C) -58 to 212 F (50.0 to C) OUTDOOR Current outdoor air temperature as measured by the local or remote outdoor sensor. The outdoor air temperature is shared to all devices in the tekmarnet system. is displayed when no outdoor sensor is available. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. SLAB TARGET The calculated slab target of the snow melting system. is displayed when the snow melt control is off. Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a snow/ice sensor or slab sensor is installed. SLAB Current slab temperature as measured by the control. Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a snow/ice sensor or slab sensor is installed. WATER SENSOR Current status of the water detection sensor. Conditions: A snow/ice sensor or snow sensor is installed. BOILER TARGET The calculated boiler target of the snow melt system. is displayed when the snow melt control is not operating the boiler. Conditions: Application Mode is set to Boil. MIX TARGET The calculated mix target of the snow melt system. is displayed when the snow melt control is not operating the mixing valve or mixing injection pump. Conditions: Application Mode is set to Mix. SUPPLY Current system supply temperature as measured by the control. Conditions: Application Mode is set to PWM, Boil or Mix. BOILER RETURN Current boiler return temperature as measured by the control. Conditions: Application Mode is set to PWM, Boil or Mix and Out/Bret Sensor is set to Bret (boiler return sensor). 0 to 100% 0 to 100% MIX RATE Current position of the mixing valve or mixing injection pump speed. Conditions: Application Mode is set to Mix. BOILER RATE Current firing rate of the modulating boiler. Conditions: Application Mode is set to Boil and Boiler Type is set to Mod (modulating boiler) _D - 06/13 12 of 44
13 View Menu (2 of 2) Item Field Range Access Description Set to OFF or ON HEAT RELAY Current status of the heat relay. The boiler, pump or electric cable is on when ON is displayed. The boiler, pump or electric cable is off when OFF is displayed. Conditions: Application Mode is set to PWM, Boil, Mix, or Elec. 0 to 100% PWM RATE Current duty cycle rate of the zone or boiler for each 20 minute cycle. Conditions: Application Mode is set to PWM or Elec. Not visible when Manual Override is not Auto. OFF or ON OFF or ON 00:00 to 24:00 hours 00:00 to 6:00 hours SYSTEM PUMP RELAY Current status of the system pump relay. Conditions: Application Mode is set to PWM, Boil or Mix and Auxiliary Relay is set to SYS (system pump). ALERT RELAY Current status of the alert relay. Conditions: Application Mode is set to PWM, Boil or Mix and Auxiliary Relay is set to ALRT (alert) or Application Mode is set to Elec. MANUAL MELT TIME When manually started, the display shows the remaining run time before shutting off. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. ADDITIONAL MELT TIME When automatically started by a Snow/Ice Sensor 090 or 094, the display shows the remaining run time before shutting off. Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a snow / ice sensor 090 or 094 is installed. 13 of _D - 06/13
14 Set Temp Menu The Set Temp menu items select the operating temperatures of the snow melt system. Item Field Range Access Description Set to 32 to 95 F (0.0 to 35.0 C) Default = 36 F (2.0 C) OFF, 20 to 95 F (-6.5 to 35.0 C) Default = OFF OFF, 20 to 95 F (-6.5 to 35.0 C) Default = 28 F (-2.0 C) 0:30 to 24:00 hours Default = 4:00 hours 0:00 to 6:00 hours Default = 0:00 hours 0:30 to 24:00 hours Default = 8:00 hours AUTO, MIN, -2, -1, MID, +1, +2, MAX Default = AUTO AUTO, 32 to 95 F (0.0 to 35.0 C) Default = AUTO OFF, -30 to 50 F (-34.5 to 10.0 C) Default = 10 F (-12.0 C) MELTING Select the desired surface temperature of the snow melt surface when melting. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. IDLING Select the desired surface temperature of the snow melt surface when idling. Idling pre-heats the slab when the slab is dry but cold and allows faster reaction time to reach the melting temperature. Recommended for commercial use only. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. STORM Select the desired surface temperature of the snow melt surface while operating in the storm operation. Storm operation temporarily pre-heats the slab to allow faster reaction time to reach the melting temperature. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. MANUAL MELT RUN TIME Select the amount of running time when manually starting the system. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. ADDITIONAL MELT TIME Select the amount of additional melting time after the Snow / Ice Sensor 090 or 094 is dry. This allows low spots on the slab to fully dry before the snow melting system is shut off. Conditions: Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a Snow / Ice Sensor is installed or Track Zone is set to On. STORM RUN TIME Select the amount of storm run time to pre-heat the slab when advised of a winter storm warning. Conditions: Application Mode is set to PWM, Boil, Mix or Elec and Storm is set to a temperature. WATER SENSITIVITY Select how sensitive the Snow / Ice Sensor 090 or 094, or the Snow Sensor 095 is to water detection. Conditions: Snow / Ice Sensor is set to 090 or 095. WARM WEATHER SHUT DOWN Select the temperature at which to shut down the snow melting system during warm weather. This allows the snow or ice to melt off the slab naturally. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. COLD WEATHER CUT OUT Select the temperature at which to shut down the snow melting system during extremely cold weather. Below this temperature, the heat loss of the slab exceeds the capacity of the boiler or heating appliance _D - 06/13 14 of 44
15 Time Menu Time settings are only required when using a programmable schedule. The Time menu is not available when the Application Mode is set to 090. Item Field Range Access Description Set to 00 to 59 Default = 00 MINUTE Select the current time minutes. 12 AM to 11 PM 00 to 23 Default = 12 AM Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday JANUARY to DECEMBER HOURS Select the current time hours. DAY OF WEEK Select the current day of the week. MONTH Select the current month. Conditions: Available when Daylight Savings Time is On. 1 to 31 Default = 1 DAY OF MONTH Select the day of the current month. Conditions: Available when Daylight Savings Time is On to 2038 Default = 2013 YEAR Select the current year. Conditions: Available when Daylight Savings Time is On. OFF or ON Default = ON DAYLIGHT SAVINGS TIME Select if daylight savings time is observed. 12 or 24 hour Default = 12 hour TIME MODE Select either 12 or 24 hour time format. OFF or ON Default = OFF CLOCK Select whether or not to show the time clock on the display. 15 of _D - 06/13
16 Schedule Menu The Schedule menu can operate on a 24 hour or 7 day repeating schedule. When a 24 hour schedule is selected, SuMoTuWeThFrSa is shown on the top of the screen to show that the event time applies to all days of the week. When a 7 day schedule is selected, each individual day of the week is shown with the event time. The Schedule menu is not available when the Application Mode is set to 090. Item Field Range Access Description Set to SuMoTuWeThFrSa 12:00 AM to 11:50 PM, SKIP or 00:00 to 23:50, SKIP Default = 6:00 AM EVENT 1 The first programmable schedule time period of the day. During Event 1 the control operates in MELT operation. SuMoTuWeThFrSa 12:00 AM to 11:50 PM, SKIP or 00:00 to 23:50, SKIP Default = 10:00 PM when Event/Day is 2 8:00AM when Event/Day is 4 EVENT 2 The first programmable schedule time period of the day. During Event 2 the control operates in OFF or IDLE operation. SuMoTuWeThFrSa 12:00 AM to 11:50 PM, SKIP or 00:00 to 23:50, SKIP Default = 6:00 PM EVENT 3 The first programmable schedule time period of the day. During Event 3 the control operates in MELT operation. SuMoTuWeThFrSa 12:00 AM to 11:50 PM, SKIP or 00:00 to 23:50, SKIP Default = 10:00 PM EVENT 4 The first programmable schedule time period of the day. During Event 4 the control operates in OFF or IDLE operation. Always available OFF, ZONE Available with tekmarnet OFF, ZONE, Master 1, 2, 3, 4, Member 1, 2, 3, 4 Default = OFF SCHEDULE Select if the control should change the temperature automatically using a programmable schedule. OFF = Programmable schedule is not used. Zone = Applies to this control only. Master 1, 2, 3, 4 = In charge of one of four available network schedules. Member 1, 2, 3, 4 = Follows selected network schedule. 2 or 4 Default = 2 EVENT PER DAY Select the number of temperatures per day. 24 hour or 7 day Default = 24 hour 24 HOUR / 7 DAY Select between a 24 hour schedule or a 7 days per week schedule _D - 06/13 16 of 44
17 Display Menu The Display menu items select the temperature units and backlight options. Item Field Range Access Description Set to F or C Default = F ON, ON MELT, OFF Default = ON MELT UNITS Select Fahrenheit or Celsius as the temperature units. BACKLIGHT Select how the display backlight operates. ON = Always on. ON MELT = On when melting, off when not melting. This provides a visual indicator to occupants that the snow melting system is currently melting. OFF = Always off. Scene Menu The Scene menu items selects if the away scene and the away key are available. The Scenes menu is not available when the Application Mode is set to 090. Item Field Range Access Description Set to NONE or AWAY Default = NONE OFF or ON Default = OFF SCENES Enable or disable the use of scenes (building overrides) on this control. AWAY KEY Enable or disable the away touch key on the home screen. Condition: Scenes must be set to Away. 17 of _D - 06/13
18 Monitor Menu The Monitor menu items provide information about the system s operation and performance. The Monitor menu is not available when the Application Mode is set to 090. Item Field Range Access Description 0 to 9999 hours HEAT HOURS Records the number of running hours since the item was last reset. Touch the number and then the ENTER key to reset to zero. 0 to 9999 hours HEAT CYCLES Records the numbers of cycles of the heat relay since the item was last reset. Touch the number and then the ENTER key to reset to zero. 0 to 9999 hours -58 to 167 F (-50.0 to 75.0 C) -58 to 167 F (-50.0 to 75.0 C) -58 to 212 F (-50.0 to C) SYSTEM PUMP HOURS Records the system pump running hours since the item was last reset. Touch the number and then the ENTER key to reset to zero. Conditions: Auxiliary Relay is set to SYS (system pump). SLAB HIGH Records the highest slab temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Snow / Ice Sensor is set to 090 or Slab Sensor is set to On. SLAB LOW Records the lowest slab temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Snow / Ice Sensor is set to 090 or Slab Sensor is set to On. OUTDOOR HIGH Records the highest outdoor temperature since the item was last reset. Touch the number and then the ENTER key to reset. -58 to 212 F (-50.0 to C) -58 to 212 F (-50.0 to C) -58 to 212 F (-50.0 to C) -58 to 212 F (-50.0 to C) -58 to 212 F (-50.0 to C) OUTDOOR LOW Records the lowest outdoor temperature since the item was last reset. Touch the number and then the ENTER key to reset. SUPPLY HIGH Records the highest supply temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Application Mode is set to PWM, Boil or Mix. SUPPLY LOW Records the lowest supply temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Application Mode is set to PWM, Boil or Mix. BOILER RETURN HIGH Records the highest boiler return temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Application Mode is set to PWM, Boil or Mix and Out/Bret Sensor is set to RET (return). BOILER RETURN LOW Records the lowest boiler return temperature since the item was last reset. Touch the number and then the ENTER key to reset. Conditions: Application Mode is set to PWM, Boil or Mix and Out/Bret Sensor is set to RET (return) _D - 06/13 18 of 44
19 Toolbox Menu The Toolbox Menu is a location for system information and Test functions. If any errors are present on the system, they will be located at the beginning of this menu. Item Field Range Access Description (INST) (USER) Default = INST ACCESS LEVEL Select the access level of the control, which determines which menus and items are available. Conditions: Adjustable only when control switch setting set to UNLOCK or tekmarnet system control switch setting set to UNLOCK. Software J1226A Type 654 SOFTWARE VERSION AND TYPE NUMBER Select the access level of the control, which determines which menus and items are available. Not applicable FACTORY DEFAULTS Loads the factory default settings. Press ENTER to load defaults. See Troubleshooting Guide HISTORY - 1 THROUGH 5 Displays a history of any past errors that have occurred on the system. Will clear after 30 days, or press Up and Down buttons for 1 second to manually clear. The last 5 history items will display if present. 19 of _D - 06/13
20 Override Menu The Override Menu allows an operator to manually test each relay and manually start the system. Item Field Range Access Description Hydronic AUTO, HAND, MAX, PRGE, OFF Electric AUTO, HAND, TEST, OFF Default = AUTO OFF or ON Default = OFF MANUAL OVERRIDE Manually override the normal automatic operation of the control to test the equipment or operate the system at the maximum temperature limits. AUTO = Normal operation HAND = Manual override of each relay output MAX = Operate hydronic system at maximum heat TEST = Operate electric system for 10 minutes PRGE = Hydronic system purge operates pumps to help bleed air from the system SYSTEM PUMP RELAY Manually turn on the system pump during the HAND Manual Override. OFF or ON Default = OFF HEAT RELAY Manually turn on the heat during the HAND Manual Override. 0 to 100% Default = 0% 0 to 100% Default = 0% OFF or ON Default = OFF 0:10 to 72:00 hours Default = 0:10 hours 0:10 to 72:00 hours Default = 24:00 hours 0:10 to 72:00 hours Default = 24:00 hours BOILER PERCENT Manually set the modulating boiler firing rate during the HAND Manual Override. Conditions: Application Mode is set to Boil. MIX PERCENT Manually set the mixing valve or mixing injection pump output during the HAND Manual Override. Conditions: Application Mode is set to Mix. ALERT RELAY Manually turn on the alert relay during the HAND Manual Override. Conditions: Application Mode is set to PWM, Boil or Mix and Alert Relay is set to ALRT (alert) or the Application Mode is set to Elec. OVERRIDE TIME Select the amount of time that the HAND Manual Override is in effect before returning to Automatic operation. MAXIMUM PURGE TIME Select the amount of time that the PURGE Manual Override is in effect before returning to Automatic operation. Conditions: Application Mode is set to PWM, Boil or Mix. MAXIMUM HEAT TIME Select the amount of time that the MAX HEAT Manual Override is in effect before returning to Automatic operation. Conditions: Application Mode is set to PWM, Boil or Mix _D - 06/13 20 of 44
21 System Menu The System Menu provides settings on how to configure and operate the mechanical equipment. Item Field Range Access Description Set to PWM, BOIL, MIX, ELEC, 090 Default = PWM APPLICATION MODE Select the control application mode. PWM = Hydronic Pulse Width Modulation. BOIL = Hydronic boiler heats snow melting system. MIX = Hydronic mixing valve or injection pump heats snow melting system. ELEC = Electric snow melt. 090 = Tandem Snow/ Ice Detection using 090 or 094 NONE, 090 (or 094), 095 Default = 090 OFF or ON Default = ON OFF or ON Default = ON OFF, OUT (Outdoor) or BRET (Boiler Return) Default = OUT OFF or ON Default = OFF OFF or ON Default = ON SYS (System Pump) or ALRT (Alert) Default = SYS 0.5 to 7.0 days, OFF Default = 3.0 days SNOW / ICE SENSOR Select if a Snow / Ice Sensor 090 or 094, or Snow Sensor 095 is installed. SLAB SENSOR Select if a Slab Sensor 072 or 073 is installed to measure the slab temperature. Conditions: Application Mode is set to PWM, Boil or Mix and Snow / Ice Sensor is set to None or 095. SLAB PROTECTION Select if the slab should be protected from large temperature differentials to avoid cracking the concrete due to high tensile stress. Conditions: Application Mode is set to Boil or Mix and Snow / Ice Sensor is set to 090 or Slab Sensor is set to On. OUTDOOR OR BOILER RETURN SENSOR Select if the Out/Bret wiring terminal is connected to an outdoor sensor or a boiler return sensor. Conditions: Application Mode is set to PWM, Boil or Mix or Elec. ECONOMELT EconoMelt allows the user to mechancially remove snow then manually start the system to melt the thin snow layer or ice. Conditions: Application Mode is set to PWM, Boil or Mix or Elec. tekmarnet SYSTEM PUMP Select if the system pump located on the tekmarnet System Control should operate when the snow melt zone is heating. Conditions: Application Mode is set to PWM, Boil or Mix and Boiler Type is set to CTRL (tn4 control). AUXILIARY RELAY Select if the auxiliary relay should function as system pump or as an alert. Conditions: Application Mode is set to PWM, Boil or Mix. MAXIMUM MELT TIME Select to limit the amount of melting run time after snow is automatically detected by a Snow / Ice Sensor 090 or 094, or a Snow Sensor 095. Conditions: Application Mode is set to PWM, Boil or Mix or Elec. 21 of _D - 06/13
22 Boiler Menu The Boiler Menu provides settings on how to configure and operate the boiler. Item Field Range Access Description Set to App Mode = Boil MOD, 1STG, EMS1, EMS2 Default = MOD App Mode = Mix OFF, ENBL, CTRL Default = OFF App Mode = PWM OFF, CTRL Default = OFF BOILER TYPE The type of boiler connected to the control. MOD = Modulating boiler. 1STG = Single one-stage on-off boiler. EMS1 = tekmar boiler staging controls. EMS2 = Viessmann modulating boilers with 0-10 V OpenTherm Module. CTRL = tekmarnet System Control operates boiler. ENBL = When operating a mixing valve or mixing injection pump, the heat relay is closed to fire the boiler or 4-20 Default = to 50% Default = 0% OFF, 10 to 180 seconds Default = OFF 30 to 230 seconds Default = 30 seconds AUTO, 2 to 42 F (1.0 to 23.5 C) Default = AUTO OFF, 50 to 180 F (10.0 to 82.0 C) Default = OFF BOILER MODULATION TYPE Select if the modulating boiler accepts a 0-10 V (dc) or 4-20 ma input signal to control the boiler firing rate. Conditions: Boiler Type is set to MOD (modulating boiler). BOILER MINIMUM MODULATION The minimum percent modulation of the boiler burner. Conditions: Boiler Type is set to MOD (modulating boiler). BOILER MODULATION DELAY Delay time between the burner firing and the boiler releasing to modulation. Conditions: Boiler Type is set to MOD (modulating boiler). BOILER MOTOR SPEED The time required for the modulating actuating motor to fully open the gas valve or ramp the burner fan from off to full speed on a modulating boiler. Set to 30 seconds unless otherwise recommended by the boiler manufacturer. Conditions: Boiler Type is set to MOD (modulating boiler). BOILER DIFFERENTIAL The temperature differential that the control is to use to cycle the boiler on and off (half above and half below target). Conditions: Boiler Type is set to MOD (modulating boiler) or 1STG (one stage). BOILER MINIMUM The minimum allowed boiler target temperature and boiler return protection temperature. Check the boiler manufacturer s manual for recommended supply water temperatures. Conditions: Application Mode is set to Boil or Application Mode is set to Mix and the Boiler Type is set to CTRL (tn4 Control) and Out/Bret Sensor is set to RET (return) _D - 06/13 22 of 44
23 Mix Menu The Mix Menu provides settings on how to configure and operate the mixing valve or mixing injection pump. The Mix menu is only available when the Application Mode is set to Mix. Item Field Range Access Description Set to 0-10 or 4-20 Default = 0-10 MIX TYPE Select the type of mixing analog signal = 0 to 10 V (dc) 4-20 = 4 to 20 ma 30 to 230 seconds Default = 105 seconds 80 to 180 F (26.5 C to 82.0 C), OFF Default = 140 F (60 C) MIX MOTOR SPEED The time that the mix actuating motor requires to operate from fully closed to fully open. Mixing Injection Pump = 30 seconds tekmar Actuator Motor 741 = 105 seconds Refer to actuating motor for correct setting. MIX MAXIMUM Select the maximum operating temperature of the system supply water. 23 of _D - 06/13
24 tekmarnet Menu The tekmarnet menu includes settings of how the snow melting control communicates and operates together with other controls. The tekmarnet menu is only available when communication is detected. Item Field Range Access Description Set to Range: AUTO, 01 to 24, b:01 to b:24, 1:01 to 1:24, 2:01 to 2:24, 3:01 to 3:24 ADDRESS The tekmarnet address of this control. To manually set the address, use the up or down arrow buttons. 1 to 24 DEVICE COUNT Provides a count of all the tekmarnet thermostats, setpoint controls and snow melting controls on the tekmarnet system. 1 to 12 Default = 1 OFF or ON Default = OFF 1 to 12 Default = 1 1 to 12 Default = 12 OFF, COND, FULL Default = OFF OFF or ON Default = OFF SNOW ZONE Select the Snow Zone that this control operates. Snow Zone 1 has the highest priority while Snow Zone 12 has the lowest priority. TRACK ZONE Select to track and record the running hours of Snow Zone 1 and repeats this run time on this control. This allows snow zones without a snow / ice sensor to automatically start. Conditions: Snow Zone must be set 2 through 12 (cannot be Snow Zone 1) and Application Mode is set to PWM, Boil, Mix or Elec. MELT GROUP A Switch may be used to manually start melting the snow zone. Set the Melt Group number to the corresponding Setpoint Enable number on the Switch. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. STORM GROUP A Switch may be used to manually start storm operation of the snow zone. Set the Melt Group number to the corresponding Setpoint Enable number on the Switch. Conditions: Application Mode is set to PWM, Boil, Mix or Elec. PRIORITY Select the priority operation of the snow melting system. Conditions: Application Mode is PWM, Mix or Elec. LOCAL NETWORK GROUP Select if scenes and time clock are shared when connected to a tekmarnet system. OFF = Send and receive messages. ON = Receive messages only. Conditions: Application Mode is set to PWM, Boil, Mix or Elec _D - 06/13 24 of 44
25 Sequence of Operation Snow Melting Overview A snow melting system can offer a safe, convenient, and cost effective way of removing snow and ice from the snow melting slab and similar surfaces. Safety is increased by activating the snow melting system as soon as the snow falls rather than waiting for mechanical snow removal after snow has accumulated. This eliminates slip hazards and reduces the risk of injury by mechanized snow melting equipment, thereby reducing potential liability costs. The elimination of snow plow equipment and corrosive salts also reduces damage to the slab surface and to the environment. Snow melting systems when controlled correctly can be cost competitive compared to mechanical snow removal. The snow melting control can operate in one of four different ways: Melt Heats the slab to melt snow or ice Idle Pre-heats the slab just below freezing to shorten the time required to melt snow Storm Temporarily pre-heats the slab just below freezing to shorten the time required to melt snow Off Snow melting system is off The control display shows the control operation in the home screen. Slab Temperature Control Controlling the slab temperature is critical to minimizing the cost of snow melting. This requires that either a Snow / Ice Sensor 090 or 094 or a Slab Sensor 072 or 073 is installed. The Snow / Ice Sensor contains a built-in slab temperature sensor. While the control will continue to operate without a slab sensor installed, operating costs will be much higher. The slab is operated using slab outdoor reset. As the outdoor temperature gets colder, the heat loss of the slab increases. In order to keep the slab surface at a constant temperature while operating, the inner core of the slab must be heated above the melt, idle or storm temperature setting. The amount that the slab inner core temperature is above the melt, idle or storm setting is proportional to the outdoor temperature. Since the slab sensor is installed below the surface of the slab, it is not measuring the true slab surface temperature but rather the inner core temperature. The control automatically compensates for this temperature difference. However, the Slab item in the View menu displays the actual measured temperature, so it is normal to view slab temperatures that exceed the melt, idle, or storm temperature settings. Surface temperature = 35 F Core (sensor) is warmer Slab Outdoor Reset Decreasing Air Temperature Increasing Slab Core Temperature Slab Surface Temperature is Constant Melt Operation The snow melting system operates the heating equipment to heat the slab from a cold start or from the idle or storm temperature to reach the melt temperature setting to melt snow or ice. Melt operation can be triggered automatically using a snow / ice sensor, by tracking the run time of another zone, manually by pressing a button, or by a programmable schedule. The melt temperature setting affects calculated targets such as the slab target, boiler target and mix target. 25 of _D - 06/13
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