Technical data

Important Precautions / General Information
7
Important regulatory and installation requirements
Power supply
Install power supply in accordance with
the regulations of the authorities
having jurisdiction or, in the absence of
such requirements, in accordance with
National Codes. Viessmann
recommends the installation of a
disconnect switch to the 120 VAC
power supply outside of the boiler
room. The installer must provide
maximum 15 A overcurrent protection
for the 120 VAC power supply (fuse or
circuit breaker).
Working with an open control
No static discharge to the internal
componentry must ever occur when
working with opened control
equipment.
About these installation 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
pertain 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.
5351 340 v1.4
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