Tekmar 665 Installation & Operation Manual
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Tekmar 665 Installation & Operation Manual

Snow detector & melting control
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Installation & Operation Manual
Snow Detector & Melting Control 665
The Snow Detector & Melting Control 665 is a microprocessor-based control which operates a single zone snow melting system.
The control can operate automatically when a Snow / Ice Sensor 090 is installed or the user can manually enable and/or disable the
system. When the control is in the melting mode, the slab is maintained at a "Melting" temperature through an on/off output which
operates a contactor for electrical cables, a boiler, an injection pump or an injection valve. When the control is not in the melting mode,
the melt system can either be shut down or it can be maintained at an idle temperature for faster response and improved safety. The
665 control includes a large Liquid Crystal Display (LCD) in order to view system status and operating information.
Additional features include:
•
Slab Outdoor Reset
•
Automatic snow detection and melt control (with 090 sensor)
•
Temporary Idle
•
Manual Override
•
Warm Weather Shut Down
Input
Snow/Ice Sensor
090 installed with
Sensor Socket
091 Optional
or
Input
Slab Sensor
Optional
Input
Outdoor
Sensor
Included
© 2016 tekmar 665 _ D - 06/16
Start
Menu
Item
Snow Detector & Melting Control 665
Pulse Width Modulation
Do not apply power
Do not apply power
1
2
3
4
5
Red
Blk
Blu
Yel
Brn/
Slab
OR
Input
Remote Display Module (RDM)
or
Remote Start / Stop Module
•
Cold Weather Cut Out
•
Remote display and adjustment capabilities
•
Test sequence to ensure proper component operation
•
Equipment Exercising
•
CSA C US certified (approved to applicable UL standards)
Melt Demand
Idle Demand
WWSD
Water
Melting
Stop
900-03
Designed and assembled in Canada by
tekmar Control Systems Ltd.
Power
Relays
Demand
Signal wiring must be rated at least 300 V.
6
7
8
9
10 11
12
Out
Com
tN2
Melt/Idle
Heat
Demand
OR
Input
Melt/Idle
Output
Turn on injection
Demand
Boiler
Snow Melting Replaces: 04/12
Idle Demand
Melt Demand
Test
off
not testing
red
testing
red
testing paused
For maximum heat,
press and hold Test
button for 3 seconds.
Meets Class B:
Canadian ICES
FCC Part 15
115 V ± 10% 50/60 Hz 600 VA
230 V (ac) 5 A 1/3 hp
20 to 260 V (ac) 2 VA
13
14
15
16
17
Melting
Sys
Power
P1
L
N
OR
Output
Output
Turn on relay for
pump
electric cables
665 _ D
06/16
Input
115 V (ac)
Power
Supply
Output
System
Pump
Output
Melt Relay

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  • Page 1 Snow Melting Replaces: 04/12 The Snow Detector & Melting Control 665 is a microprocessor-based control which operates a single zone snow melting system. The control can operate automatically when a Snow / Ice Sensor 090 is installed or the user can manually enable and/or disable the system.

  • Page 2: Table Of Contents

    User Interface The 665 uses a Liquid Crystal Display (LCD) as the method of supplying information. You use the LCD in order to setup and monitor the operation of your system. The 665 has four push buttons (Menu, Item, (Start), (Stop)) for selecting and adjusting settings. As you program your control, record your settings in the ADJUST Menu table which is found in the second half of this brochure.

  • Page 3: Description Of Display Elements

    - Warning Symbol: Indicates presence of hazards which can cause severe personal injury, death or substantial property damage if ignored. - Double insulated INSTALLATION - Local level, appliances CATEGORY II © 2016 tekmar 665 _ D - 06/16 3 of 28...

  • Page 4: Sequence Of Operation

    EXERCISING (EXERCISE) The 665 has a built-in pump exercising function. The exercising period is adjustable and is factory set at 70 hours. If a pump output has not been operated at least once during every exercising period, the control turns on the output for 10 seconds. This minimizes the possibility of a pump or valve seizing during a long period of inactivity.
  • Page 5 The system pump (Sys P1) and zoning device continue to operate for 20 seconds after the last demand is removed. This purges the residual heat from the boiler(s) into the snow melting slab. © 2016 tekmar 665 _ D - 06/16 5 of 28...

  • Page 6: Section C: Melting Enable / Disable

    Once the snow melting system is enabled, the word STRT is displayed for at least 5 seconds in the STATUS item while in the VIEW menu. Start Stop © 2016 tekmar 665 _ D - 06/16 6 of 28...
  • Page 7 Melt Demand AUTOMATIC MELTING ENABLE (Snow / Ice Sensor 090) The 665 uses the Snow / Ice Sensor 090 to provide an automatic melting enable signal to start the snow melting system. The control continually monitors the 090 for the presence of moisture.

  • Page 8: Section D: Melting Operation

    Idling mode. The table on page 14 describes how the control responds to enable and disable signals. SLAB TEMPERATURE CONTROL The 665 uses a snow / ice sensor or slab sensor to provide slab temperature control. Slab Sensor...

  • Page 9: Section E: Idling Operation

    When the snow melting system starts from a cold temperature, the time required for the system to reach the melting temperature may be excessive. To decrease this start up time, the 665 has an idling feature which can maintain the zone at a lower temperature.

  • Page 10: Installation

    ––––––––––– STEP ONE GETTING READY Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar sales representative for assistance. Type 665 includes: One Snow Detector & Melting Control 665, One Outdoor Sensor 070, Data Brochures D 665, User Brochure U 665, and Application Brochure A 665.
  • Page 11 If using Attach the conduit, base to the remove the wall, soffit flexible plug or electrical from the box. base bottom. © 2016 tekmar 665 _ D - 06/16 11 of 28...

  • Page 12: Electrical Connections

    This connection provides power to the microprocessor and display of the control. As 115 V (ac) well, this connection provides power to the Sys P1 terminal (15) from the Power L terminal (16). © 2016 tekmar 665 _ D - 06/16 12 of 28...
  • Page 13 If a Snow / Ice Sensor 090 is not used, a slab sensor can be used. If a slab sensor is used, connect the two wires from the slab sensor to the Blk and Brn / Slab terminals (2 and 5). The slab sensor is used by the 665 to measure the slab temperature of the zone.

  • Page 14: Testing The Wiring

    (tN2) input. Connect the Com terminal from the ® appropriate tN2 device to the Com terminal (7) on the 665. Connect the tN2 terminal from the appropriate tN2 device to the tN2 terminal (8) on the 665. Note: The wires from the RDM and Remote Start / Stop Module are polarity sensitive.
  • Page 15 Apply power to the control. The operation of the control on power up is described in the Sequence of Operation section of the brochure. © 2016 tekmar 665 _ D - 06/16 15 of 28...

  • Page 16: Dip Switch Settings

    Access Levels The tekmar Snow Detector & Melting Control 665 comes with four Access Level settings. These Access Levels restrict the number of Menus, Items and Adjustments that can be accessed by the user. The four access levels are Limited (LTD), User (USER), Installer (INST) and Advanced (ADV).

  • Page 17: Control Settings

    -58 to 167°F Slab Current slab sensor temperature. (-50 to 75°C) STRT, STOP, IDLE, EXT, 0:00 to 23:59 hr, – – –, Status Operating status. INF, WWSD, CWCO, DET, IDLE © 2016 tekmar 665 _ D - 06/16 17 of 28...

  • Page 18: Adjust Menu

    Exercise The frequency with which the control 30 to 240 hours, exercises the pumps and valves that are operated (in 10 hour steps) by the control. Default = 70 hr © 2016 tekmar 665 _ D - 06/16 18 of 28...

  • Page 19: Monitor Menu

    ® run in a noisy electrical environment, this can cause interference in the communication between the control and the tN2 device. © 2016 tekmar 665 _ D - 06/16 19 of 28...

  • Page 20: Schedule Menu

    Default = ON returns to the default display. Access The access level that is to be used by the control. ADV, INST, USER, LTD DIP switch = Unlock Default = INST © 2016 tekmar 665 _ D - 06/16 20 of 28...

  • Page 21: Testing And Troubleshooting

    MAX HEAT The Snow Detector & Melting Control 665 has a function called Max Heat. In this mode, the 665 turns on and operates the system up to the maximum set temperatures, and the mixing device at the set percentage. The control continues to operate in this mode for up to 24 hours or until either the Item, Menu or Test button is pressed.
  • Page 22 Allow the system and the control to operate over a known period of time and then System record the Monitor items. Use this information to help diagnose any remaining problems. © 2016 tekmar 665 _ D - 06/16 22 of 28...

  • Page 23: Error Messages

    665 Error Messages (1 of 2) 665 Error Messages (1 of 2) Error Displayed Description of Error The control was unable to store a piece of information into its EEPROM. This error can be caused by a noisy power source. The control will display the error message and will continue to operate as normal.
  • Page 24 The time limit is set using the NO HEAT item in the MONITOR menu. To clear this warning, press either the Menu or Item button. © 2016 tekmar 665 _ D - 06/16 24 of 28...
  • Page 25 Notes © 2016 tekmar 665 _ D - 06/16 25 of 28...
  • Page 26 Notes © 2016 tekmar 665 _ D - 06/16 26 of 28...
  • Page 27 White PVC plastic, NEMA type 2 Operating range -60 to 140°F (-51 to 60°C) Sensor NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 Warranty Limited 3 Year (See D070 for full warranty) © 2016 tekmar 665 _ D - 06/16 27 of 28...

  • Page 28: Technical Data

    The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURA- sole discretion: the cost of parts and labor provided by tekmar to repair defects in BILITY OR DESCRIPTION OF THE PRODUCT, ITS NON-INFRINGEMENT OF materials and / or workmanship of the defective product;...

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