Application Brochure

ManualsBrandsTekmar ManualsThermostats & ControlsSnow Detector & Melting Control - Outdoor Temp. Reset - Two Zone - Two Stage Boiler - Mixing

1 of 12 © A 664 - 12/09

- Application Brochure

Snow Detector & Melting Control 664

A 664

12/09

Application

The Snow Detector & Melting Control 664 is designed to control up to two zones in a snow melting system.

The control automatically adjusts the mixed supply water to the snow melting system by controlling up to two

boilers and a single mixing device. For mixing, the 664 can use a variable speed injection pump, a floating

action mixing valve or a 4-20 mA device. The snow melting system may be started manually or automatically

through the use of a Snow / Ice Sensor 090.

120 V (ac)

24 V (ac)

Melt Demand

Idle Demand

WWSD

Minimum

Maximum

Water

Melting

Snow Detector & Melting Control 664

Two Zone, Two Stage Boiler, Mixing

158033

Start Stop

Item

Features of the Snow Detector & Melting Control 664

Please refer to Essay E 005: Control Functions and Benefits for a detailed description of these features.

■ Boiler Differential (Automatic)

■ Boiler Minimum Supply

■ PID Staging

■ Equal Run Time Rotation

■ Fire Delay

■ Boiler Mass

■ Boiler Enable

■ Floating Action Output

■ Modulating Output

■ Variable Speed Output

■ Boiler Protection

■ System Protection

■ Snow / Ice Detection

■ Slab Protection

■ Viscosity Compensation

■ Slab Outdoor Reset

■ Snow Melting Setpoint

■ Snow Idling Setpoint

■ Warm Weather Cut Off

■ Cold Weather Cut Off

■ Pump / Integrated Exercising

Summary of content (12 pages)

PAGE 1
- Application Brochure A 664 Snow Detector & Melting Control 664 12/09 Melt Demand Idle Demand WWSD Minimum Maximum Water Melting Start Menu Stop Item Snow Detector & Melting Control 664 Two Zone, Two Stage Boiler, Mixing 158033 120 V (ac) 24 V (ac) Features of the Snow Detector & Melting Control 664 Please refer to Essay E 005: Control Functions and Benefits for a detailed description of these features.
PAGE 2
© 2009 A 664 - 12/09 2 of 12 120 V (ac) Snow/Ice Sensor (S1) 090 Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 3
of 12 © 2009 A 664 - 12/09 120 V (ac) L N Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 4
© 2009 A 664 - 12/09 4 of 12 Snow/Ice Sensor (S4) 090 120 V (ac) Mix Supply Sensor (S1) 082 V1 M C1 Boiler Supply P1 Sensor (S2) 082 Outdoor Sensor (S5) 070 12/09 A 664-2 tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.com Head Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650 System Operation The Snow Detector & Melting Control 664 provides snow melting for a single zone system.
PAGE 5
of 12 © 2009 A 664 - 12/09 120 V (ac) L N 24 V (ac) Class 2 Transformer C R 1 Com C 2 Opn 3 Cls Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 6
© 2009 A 664 - 12/09 6 of 12 Snow/Ice Sensor (S3) 090 120 V (ac) D1 Mix Return Sensor (S1) 082 Mix Supply Sensor (S2) 082 664 Mechanical P1 V1 M Outdoor Sensor (S4) 070 12/09 A 664-3 tekmar Control Systems Ltd., Canada; tekmar Control Systems, Inc., U.S.A.; www.tekmarcontrols.com Head Office: 4611-23rd Street, Vernon, B.C. Canada, V1T 4K7; (250) 545-7749 Fax (250) 545-0650 System Operation The Snow Detector & Melting Control 664 provides snow melting for a single zone system.
PAGE 7
of 12 © 2009 A 664 - 12/09 120 V (ac) L N Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 8
© 2009 A 664 - 12/09 8 of 12 Slab Sensor (S4) 072/073 120 V (ac) P4 Snow/Ice Sensor (S5) 090 Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 9
of 12 © 2009 A 664 - 12/09 120 V (ac) L N Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 10
© 2009 A 664 - 12/09 10 of 12 Slab Sensor (S4) 072/073 120 V (ac) Z2 M Slab Sensor (S5) 072/073 Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 11
of 12 © 2009 A 664 - 12/09 120 V (ac) L N 24 V (ac) Class 2 Transformer C R Concept Drawing This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system.
PAGE 12
Speciﬁcations The following are the recommended specifications for the Snow Detector & Melting Control 664 • The system water temperature shall be based on the outdoor temperature and feed back from sensors located in the snow melting slabs. • The control shall have an adjustable Minimum Supply water temperature setting to help prevent condensation of flue gases and subsequent corrosion and blockage of the boiler’s heat exchanger and chimney.