Shutdown And Preservation - Viessmann Vitomax HW Series Operating And Service Instructions

Operating information
Operating tips
Required water properties
The required water properties for the operation of
boiler and heating systems are specified in the "Stand-
ard values for water quality" chapter on page 11.
Commissioning
Note
When commissioning, ensure that the installation room
is well ventilated, as odour nuisance may occur.
Authorised to commission the boiler:
■ Viessmann Industrial Service (for contact details see
page 28) or
■ The system installer or
■ An approved contractor or institution nominated by
the system installer
Required for commissioning:
■ Presence of a competent expert authority
■ Completion of a test report
■ Required signatories:
System installer
–
Official expert authority
–
System user
–
■ The flue gas inspector (where applicable) should be
notified of the commissioning within 4 weeks.
Systems with operating temperatures
Category IV boiler systems compliant with Pressure Equipment Directive
Requirements for commissioning
System installation has official approval.
■
■ The system has been checked by an expert author-
ity.
■ Commissioning of the control system is carried out
by a qualified organisation.
Requirements for operators
Only qualified personnel may operate, supervise and
service the system.

Shutdown and preservation

Shutdown
Shutdown means shutting down the system via the cir-
cuit breaker at the control panel. The duration of the
shutdown determines the preservation measures
described in this chapter.
A short-term shutdown is not recommended, as every
start-up process subjects the boiler to additional
stresses. For a period of up to 72 hours, for example
over a weekend, the boiler should be left to continue
operating.
8
Recommended operating conditions to prevent
damage to the boiler system
Never interrupt boiler operation, even if no heat is
being drawn off temporarily
Maintain the following at all times
■ Water temperature: 70 °C
■ Specified operating pressure
Multi boiler systems with a boiler on permanent
standby:
Changeovers between heating and standby should be
infrequent, for example with each annual inspection of
the overall system
110 °C
>
Requirements for operation without supervision
Boiler system is equipped in accordance with EN
■
12953, Part 6.
■ The system has received official approval for opera-
tion.
Checking system operation
Scope checks should be determined in accordance
with EN 12953-6