IDLING MODE (IDLING)
(See fig. r)
Extra time may be required when the snow melting system
starts from a cold temperature.
• To decrease the start up time, the slab can be maintained at
an “Idling” temperature
• Idle feature is also useful for preventing frost and light ice
formation
• When control is in idling mode, the word IDLE appears in the
STATUS item in the View Menu
• IDLING setting in the Adjust Menu sets the theoretical slab
surface temperature that is kept while control is in idling
mode
There are four ways in which the snow melting system can be
enabled on the SYSTEMpro 311:
• External Mix Demand
• Snow Melt Enable Module
• Remote Display Module
• Using Start / Stop buttons on the SYSTEMpro 311
EXTERNAL MIX DEMAND
An external snow melting demand is generated when a
voltage between 24 and 240 VAC is applied across the Mix
Demand terminals (1 and 2).
• An external demand must be present for at least 4 seconds
to start snow melting system
• Once started, slab temperature is increased to MELTING
setting and maintained at MELTING temperature until RUN
TIME reaches 0:00
• If RUN TIME reaches 0:00 and external demand is still
present, control continues at MELTING temperature until
external demand is removed or system is stopped
Section E4: Snow Melt Enable
78
CONTROL FUNCTION
OVER
VIEW
CONTROL FUNCTION OVERVIEW -
CONTROL FUNCTION OVERVIEW - Section E - Snow Melting
Adjust
r
Access Level
LTD
USER
INST
ADV
Содержание SYSTEMpro 311
Страница 1: ...SYSTEMpro 311 Installation Manual...
Страница 44: ...PROGRAMMING THE ADJUST MENU B DHW SETTINGS 42 PROGRAMMING PROGRAMMING Step 1 Programming the Control...
Страница 52: ...PROGRAMMING THE ADJUST MENU D SNOW MELTING SETTINGS 50 PROGRAMMING PROGRAMMING Step 1 Programming the Control...
Страница 56: ...PROGRAMMING THE ADJUST MENU E BOILER OPERATION 54 PROGRAMMING PROGRAMMING Step 1 Programming the Control...
Страница 90: ...88 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Страница 91: ...89 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Страница 92: ...90 APPENDIX III APPENDIX III Application Drawings...
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