Frequency; Performed By; Service - Viessmann Vitocrossal 300 CT3 Series Operating Instructions And User's Information Manual

Vitocrossal 300, CT3 Series Operating
Maintenance Schedule
The following is an overview of scheduled service steps.

Frequency

Performed by 
Monthly Owner /
Operator
Annually Owner /
Operator
Heating
Contractor
Periodically Heating
Contractor
(continued)

Service

Check the system pressure frequently
Ensure proper operation of the boiler control.
Inspect all seals; retighten or replace as necessary.
Ensure an adequate supply of combustion air and ventilation air into and out of the
mechanical room is being maintained.
Ensure that nothing is obstructing the flow of combustion - ventilation air, and no
chemicals, garbage, gasoline, combustible materials, flammable vapors, or liquids are
stored, not even temporarily, in the vicinity of the boiler.
Check for water on the floor from the discharge pipe of pressure
relief valve or any other pipe, pipe joint, valve, or air vent.
Test pressure relief valve and check for proper operation.
Check all operational high limits for proper operation.
Check for proper operation of the condensate neutralization system (if used).
Test pressure relief valve and check function.
Check the condition and fill status of the neutralization media.
Check the pH value of the flue gas condensate.
Check for moisture water on vent pipe joints and appearance of ice on the vent pipe
or chimney outlet in the winter time.
Ensure service work/test is conducted at least annually by qualified personnel,
and that any deficiencies are corrected immediately.
Test functionality of safety high limits.
Test burner with burner accessories according to their corresponding maintenance
checklist.
Test and establish proper chemical makeup of system water.
Check flue pipe condition, chimney connection and chimney itself.
Check pressure relief valve and system pressure, and verify proper operation
Check heating pipe joints, valves, air vents, etc. System leaks must be corrected
immediately to avoid further defects.
The cause of defect must also be determined in order to avoid further problems.
Check for proper combustion air supply and ventilation to boiler / mechanical room.
Check for combustible materials or chemicals stored too close to the boiler.
Test high limits by dialing lower settings, switching burner on/off to verify
functioning of same. Test low water cut-off, check and verify proper function
according to manufacturer's instructions.
When circulating pump is field-installed or existing, check requirements
for maintenance or lubrication according to manufacturer's specifications.
Check for oil-tight fuel lines; clean or exchange fuel oil filters annually.
Check and inspect oil tank.
Check for gas-tight connection of gas piping, unions, gas valve and manifold.
Check proper ignition on oil or gas burner operation.
Combustion test must be performed by a qualified heating contractor.
Ensure proper operation of door safety switch.
Ensure functionality of low water cut-offs, including flushing of float types (if used)
during operation, based on supplier's instructions.
Inspect low- and/or high pressure gas switch (if used).
Inspect main burner flame and follow burner manufacturer's instruction manual
for detailed service and maintenance guidelines. Manual shipped with burner.
All boilers and the boiler room must be kept free of high dust levels, high humidity,
aggressive vapors and/or chemicals containing chlorine.
Ensure proper boiler room ventilation and combustion air is maintained.
Valves, fittings and pipes not pressure tight must be repaired.
Combustion chamber door, clean-out opening covers, glass fiber rope seals and
flanges may need to be retightened and resealed.
Inspection and Maintenance
Regular service work ensures reliable, energy-efficient,
and environmentally friendly operation.
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