Table of Contents
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Installation & Operation Manual
Snow Melting Control 654
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
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Automatic Snow / Ice Detection
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Supports Both Inslab & Retrofit Aerial Sensors
•
Manual Start With Timer
•
Programmable Schedule
®
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tekmarNet
Communication Compatible
•
Warm Weather Shut Down
•
Cold Weather Cut Out
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Idling
Snow Melt Zoning With Priority
•
•
Tandem Snow / Ice Detection
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Slab Protection
•
Storm
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EconoMelt
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Manual Override
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Snow Melt Zone Tracking
•
Scenes
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Away Key
•
Exercising
•
Alert Output
1 of 44
654_D
06/13
Snow Melting
Replaces: New
© 2013
654_D - 06/13
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Summary of Contents for Tekmar 654
- Page 1 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.
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Page 2: Table Of Contents
Table of Contents Important Safety Information ..........3 Sequence of Operation ............25 Snow Melting Overview ..........25 Installation .................4 Slab Temperature Control ..........25 Preparation ..............4 Melt Operation .............. 25 Physical Dimensions ............. 4 Melt - Manual Start and Timed Stop ......26 Installation Location ............ -
Page 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: •... -
Page 4: Installation
Materials Required - - - ---------------- ---------------- - ---------------------------------- -------------- - - - - -------------------------------- - ------------------------------------------------- • 18 AWG LVT Solid Wire (Low Voltage Connections) • tekmar 24 V (ac) Transformer 009 Physical Dimensions 29/32" Front View Side View... -
Page 5: Sizing The Transformer
Sizing the Transformer The control requires an external transformer. A tekmar The total power capacity of the power supply should be Transformer 009 can supply up to 40 VA, and includes an larger than the total load of all the devices connected to the in-line fuse to protect the transformer and control. - Page 6 tN4 Wiring Center or Zone Manager ------------- ------------- Alert Relay Output ----------------------- - -- -- -- ------------------------------ No Power No Power Aux Ht Yel Blu Red Out/ Aux Ht Yel Blu Red Out/ – Slab Bret – Slab Bret tN4 C R W tN4 C R W Zone 1 Zone 2 tN4 Wiring Center...
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Page 7: Sensor Wiring
Sensor Wiring Mounting the Outdoor Sensor ------------------- ------------- -------------------------------- ------ -- -- -------------------------------------------------------------------------- Notice: The temperature sensor (thermistor) is built into the • In order to prevent heat transmitted through the wall from sensor enclosure. affecting the sensor reading, it may be necessary to install an insulating barrier behind the enclosure. -
Page 8: Testing The Sensor Wiring
Immersion Well Retaining Clip If a Universal Sensor is mounted onto 1" (25 mm) diameter L type copper pipe, Universal there is approximately an 8 second delay between a sudden change in water Sensor temperature and the time the sensor measures the temperature change. This delay increases considerably when mild steel (black iron) pipe is used. -
Page 9: Manual Override - Maximum Heat
Step 5: Exit the Manual Override by selecting Auto. Switch Settings Switch Position Action 1058-01 LOCK ACCESS LEVEL Snow Melting Control 654 The control is locally locked and the access level cannot be changed. tekmarNet Electric or Hydronic Boiler/Mixing Set to Lock when installation has been completed. www.tekmarControls.com Power: 24 V (ac) ±10%, 60 Hz, Class 2,... -
Page 10: User Interface
User Interface Display Touch to display Run Time, Outdoor & Slab Temperature Status Field Touch to quickly enter the View menu Operation Field Touch to turn system Touch to go to the next setting off while away Home Button Touch to ENTER Return to the Home Screen Melt or Stop... -
Page 11: Programmable Settings
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 -------------------- -------------------- Setting Items ------------------------- -- -- -- -- -- - ------------------------------------... -
Page 12: View Menu
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 SNOW ZONE User The snow melt zone number on the tekmarNet ® 1 to 12 system. - Page 13 View Menu (2 of 2) Item Field Range Access Description Set to HEAT RELAY Current status of the heat relay. The boiler, pump or User electric cable is on when ON is displayed. The boiler, OFF or ON pump or electric cable is off when OFF is displayed. Installer Conditions: Application Mode is set to PWM, Boil, Mix, or Elec.
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Page 14: Set Temp Menu
Set Temp Menu The Set Temp menu items select the operating temperatures of the snow melt system. Item Field Range Access Description Set to MELTING 32 to 95°F Select the desired surface temperature of the snow melt User (0.0 to 35.0°C) surface when melting. -
Page 15: Time Menu
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 MINUTE 00 to 59 User Default = 00 Installer Select the current time minutes. -
Page 16: Schedule Menu
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. -
Page 17: Display Menu
Display Menu The Display menu items select the temperature units and backlight options. Item Field Range Access Description Set to UNITS °F or °C User Select Fahrenheit or Celsius as the temperature Default = °F Installer units. BACKLIGHT Select how the display backlight operates. ON MELT, ON = Always on. -
Page 18: Monitor Menu
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 HEAT HOURS User 0 to 9999 hours Records the number of running hours since the item was last reset. -
Page 19: Toolbox Menu
UNLOCK. SOFTWARE VERSION AND TYPE NUMBER Software J1226A User Select the access level of the control, which determines which menus Type 654 Installer and items are available. FACTORY DEFAULTS Not applicable Installer Loads the factory default settings. -
Page 20: Override Menu
Override Menu The Override Menu allows an operator to manually test each relay and manually start the system. Item Field Range Access Description Hydronic MANUAL OVERRIDE AUTO, HAND, Manually override the normal automatic operation of the control to test the equipment or operate the system at the maximum temperature MAX, PRGE, OFF limits. -
Page 21: System Menu
System Menu The System Menu provides settings on how to configure and operate the mechanical equipment. Item Field Range Access Description Set to APPLICATION MODE Select the control application mode. PWM = Hydronic Pulse Width Modulation. PWM, BOIL, MIX, BOIL = Hydronic boiler heats snow melting system. ELEC, 090 Installer MIX = Hydronic mixing valve or injection pump heats... -
Page 22: Boiler Menu
The type of boiler connected to the control. Default = MOD MOD = Modulating boiler. 1STG = Single one-stage on-off boiler. App Mode = Mix EMS1 = tekmar boiler staging controls. Installer OFF, ENBL, EMS2 = Viessmann modulating boilers with 0-10 V CTRL OpenTherm Module. -
Page 23: Mix Menu
Installer Default = 105 Mixing Injection Pump = 30 seconds tekmar Actuator Motor 741 = 105 seconds seconds Refer to actuating motor for correct setting. 80 to 180°F (26.5°C to 82.0°C), MIX MAXIMUM... -
Page 24: Tekmarnet ® Menu
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, ADDRESS... -
Page 25: Sequence Of Operation
Sequence of Operation Snow Melting Overview A snow melting system can offer a safe, convenient, and cost The snow melting control can operate in one of four effective way of removing snow and ice from the snow melting different ways: slab and similar surfaces. -
Page 26: Melt - Manual Start And Timed Stop
Melt - Manual Start and Timed Stop The snow melting system can be started manually in one of Once manually started, the snow melting system continues to three different methods: operate until the time set by the Manual Melt Run Time setting in the Set Temp menu elapses. -
Page 27: Melt - Economelt
Melt - EconoMelt When a Snow / Ice Sensor 090 or 094 is installed, the installer Touch START key can choose to select to either automatically or manually start the snow melting system. Selecting EconoMelt to On provides the option to remove the snow using a snow plow 090 and slab dry and ADD MELT time elapses or shovel and then use the snow melting system to melt the... -
Page 28: Melt - Tracked Start And Stop
Melt - Tracked Start and Stop The snow melting system can have multiple zones. Zones Track Melt Start and Stop have the option to track the melting run time of zone 1. This is useful in cases where zone 1 has an automatic Snow / Ice Zone 1 Zone 2 Zone 3... -
Page 29: Additional Melting Time
Additional Melting Time A Snow / Ice Sensor 090 or 094 automatically shuts off the snow melting system when the water sensor is dry. Due to Snow Ice Sensor the construction of the slab and the layout of the heating pipe or electrical cable, there may be areas that do not melt completely. -
Page 30: Warm Weather Shut Down
Warm Weather Shut Down During warm weather, the slab is warm enough to naturally Manual WWSD melt snow or ice. The control has a Warm Weather Shut The control enters WWSD when the outdoor air temperature Down (WWSD) setting in the Set Temp menu that prevents exceeds the WWSD setting by 1°F (0.5°C) and when the the control from entering Melt, Idle or Storm operation in order slab temperature exceeds 34°F (1°C). -
Page 31: Programmable Schedules
Programmable Schedules To provide greater energy savings, the control can operate on To follow a master schedule: a programmable schedule. The schedule is stored in memory • Assign the control to follow a master schedule by setting and is not affected by loss of power to the control. If tekmarNet ®... - Page 32 Hydronic Priority Levels -------------------- ------------- ---------------------------------------- -- --- -- -------------------------------------------------------------------------------- Priority = None MELT All zones have the same priority and can operate at the same time. Zone 1 This setting is recommended when the boiler plant capacity is sized larger than the heat loss of all zones at design conditions.
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Page 33: Slab Protection
Slab Protection In a hydronic snow melting system, the boiler or heating plant capacity may be much larger than the load of the snow tensile stresses melting zones. This can result in large temperature differentials between the supply water temperature and the slab creating large tensile stresses on the slab. - Page 34 - - - - - - - - - - - - - - - - - --------------------------- The EMS1 signal is a method for the snow melting control to send the boiler target temperature to a tekmar Boiler Control 268. The control provides a 0-10 V (dc) signal proportional to the boiler target and turns on the heat relay to operate the boiler to maintain the Boiler Target temperature.
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Page 35: Mixing Operation
---------------- or a mixing injection pump is installed to regulate the supply The 654 provides a 0-10 V (dc) signal to operate an actuator water temperature to the snow melting system. The boiler or motor for mixing using a 3 or 4-way mixing valve. -
Page 36: Tandem Snow / Ice Detection
Snow Zone that critical, it is possible to install two Snow / Ice Sensors 090 the 654 is to operate. There can be up to 12 different or 094 into a single snow melt zone. Both sensors are used Snow Zones. -
Page 37: Melt And Storm Groups
Melt and Storm Groups The snow melting control is able to respond to a setpoint enable Melt Group 1 signal from a User Switch or Gateway to remotely activate ® or deactivate the storm or melt operation. The tekmarNet Zone 1 Zone 2 communication system supports setpoint enable signals 1 Melt... -
Page 38: Troubleshooting
Troubleshooting It is recommended to complete all wiring to ensure trouble free operation. Should an error occur, simply follow these steps: 1. Find: If the control flashes on the screen, it is indicating a problem on the system. 2. Identify: Hold the Home button for 3 seconds, touch the NEXT key to locate the Toolbox Menu, then touch the ENTER key. The error code should appear as the first item. - Page 39 Error Messages (2 of 4) Error Message Description ADDRESS TAKEN ERROR Two devices (thermostats, setpoint controls, snow melting controls) have been manually set to the same ® address. The device continues to operate with this error but does not communicate with the tekmarNet system.
- Page 40 Error Messages (3 of 4) Error Message Description BOILER RETURN SENSOR SHORT CIRCUIT ERROR Due to a short circuit, the control is unable to read the Boiler Return Sensor 082. The control continues operation but does not provide any boiler return protection. Check the boiler return sensor wire for short circuits according to the sensor installation manual.
- Page 41 Error Messages (4 of 4) Error Message Description SNOW / ICE SENSOR ERROR The control is unable to properly detect the Snow / Ice Sensor 090 or 094. The control can no longer automatically detect snow or ice but manual start of the snow melting system is still available. Check the Snow / Ice Sensor brown, yellow, red and black wires according to the sensor installation manual.
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Page 42: Frequently Asked Questions
Frequently Asked Questions Symptom Look For... Corrective Action LCD display is Use electrical meter to measure 24 V (ac) voltage on input power R and C Power to control terminals. System pump Idle operation requires that the system pump operate continuously while below the Display shows Idle always on melting temperature setting. - Page 43 Set Temp Menu Settings Item Setting Item Setting MELTING STORM RUN TIME WATER SENSITIVITY IDLING STORM WARM WEATHER SHUT DOWN MANUAL MELT RUN TIME COLD WEATHER CUT OUT ADDITIONAL MELT TIME System Menu Settings Item Setting Item Setting APPLICATION MODE ECONOMELT SNOW / ICE SENSOR tekmarNet...
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Page 44: Technical Data
Representative. tekmar Control Systems Ltd., A Watts Water Technologies Company. Head Offi ce: 5100 Silver Star Road, Vernon, B.C. Canada V1B 3K4, 250-545-7749, Fax. 250-545-0650 Web Site: www.tekmarControls.com Product design, software and literature are Copyright ©2013 by...
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