4
Safety
Important regulatory and installation requirements
The cascade control must only be used in conjunction with a CSA certified Vitocontrol-S or Vitocontrol-C boiler and system
control panel.
Power supply
Install power supply in accordance with
the regulations of the authorities hav-
ing jurisdiction or, in the absence of
such requirements, in accordance with
National Codes.
Note on connecting e xternal “potential-
free” contacts t o the cascade control
Ensure that all contacts have sufficient
insulation clearance to live parts and
are certified for these applications.
Working with an open c ontrol
No static discharge to the internal com-
ponentry must ever occur when work-
ing with opened c ontrol equipment.
About these instructions
Take note of all symbols and notations intended to draw attention to potential hazards or important product information.
These include ”WARNING”, ”CAUTION”, and ”IMPORTANT”. See below.
Warnings draw your attention to the
presence of potential hazards or
important product information.
Cautions draw your attention to the
presence of potential hazards or
important product information.
Helpful hints for installation,
operation or maintenance which per-
tain to the product.
This symbol indicates that additional,
pertinent information is to be found in
column three.
This symbol indicates that other
instructions must be referenced.
5285 565 v1.35285 565 v1.3
Indicates an imminently hazardous
situation which, if not avoided, could
result in death, serious injury or
substantial product/property damage.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or
product/property damage.
CAUTION
IMPORTANT
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