tekmar 654 Snow Melting Control User Manuals - Manual (Page 2)

© 2013 654_U - 05/13 2 of 4 A Watts Water Technologies Company
Snow Melting Operation
Snow melting operation can be started manually or automati-
cally depending on which sensors are installed. Automatic
start and stop operation requires a Snow / Ice Sensor 090,
or 094. Automatic start with a timed stop requires a Snow
Sensor 095.
Manual Operation -------------------------------- --------------------------------
Touch the Melt key on the control display. The control uses a
timer to operate the snow melting system and shuts off when
the timer has expired.
Press
Melt
Automatic Start and Stop ------------------------- -------------------------
The system automatically starts as soon as snow or ice is
detected and stops when the slab is dry. A Snow / Ice Sensor 090
or 094 is required for automatic start and stop operation.
EconoMelt --------------------------------------------------------------- ---------------------------------------------------------------
When a Snow / Ice Sensor is installed, the control has the
option to EconoMelt. This allows the snow to be mechanically
removed using a plow or shovel and then manually starting
the snow melting system to melt the remaining last thin layer
of snow or ice. The system operates until the sensor is dry.
Tracked Start and Stop ---------------------------------------- ----------------------------------------
The snow melting system can have multiple zones. Zones
without a snow / ice sensor or snow sensor can repeat the
run time of zone 1.
Zone 1
Track Melt Start and Stop
Records
Run Time
Snow / Ice
Sensor
Slab
Sensor
Slab
Sensor
Zone 2 Zone 3
Repeats
Zone 1 Run
Time + Add
Melt Time
Repeats
Zone 1 Run
Time + Add
Melt Time
Scheduled Start and Stop ------------------------ ------------------------
The snow melting system can start and stop based upon a
programmable schedule. While the schedule is in Event 1
(wake) or 3 (occupied), the control is in melt operation. When
the schedule is in Event 2 (unoccupied) or 4 (sleep) the control
is in idle or off operation.
Idle Operation ------------------------------------ ------------------------------------
Idle operation pre-heats the slab whenever the slab is below
freezing. This allows the slab to quickly warm up to the
melting temperature in case snow or ice is detected. Idling
requires a large amount of energy and is recommened for
commercial or institutional installations where safety concerns
are paramount.
Snow / Ice
Sensor
090 or 094
Snow
Sensor
095
Automatic Start and Timed Stop ------------------ ------------------
The system automatically starts as soon as snow or ice is
detected and stops when the Manual Melt Run Time counter
has elasped. The Manual Melt Run Time setting is adjustable
in the Set Temp menu. A Snow Sensor 095 is required for
automatic start and timed operation.