Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 223

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Maintenance Schedule
Frequency Performed by
Monthly Owner /
Operator
Annually Owner /
Operator
Heating
Technician
Periodically Heating
Technician
(continued)
Service

Check the system pressure frequently.
Ensure proper operation of the boiler control. Refer to operating instructions of the
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 at all times.
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. See instructions attached
to pressure relief valve.
Check all operational high limits for proper operation.
Check for proper operation of the condensate neutralization system (if used).
Check the condition and fill status of the neutralization media.
Check the pH value of the flue gas condensate (min. 6.5).
Check for moisture water on external 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 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.
Test high limits by dialing lower settings, then switching burners on/off to verify
function. Test low water cut-off, check and verify proper function according to
manufacturer's instructions.
Check requirements for maintenance or lubrication of the circulation pumps
according to manufacturer's instructions.
Check for gas-tight connection of gas piping, unions, gas valve and manifold.
Check proper ignition of the burners.
Combustion test must be performed by a qualified heating technician.
Ensure functionality of low water cutoffs, including flushing of float types (if used)
during operation. Refer to the manufacturer's instructions.
Inspect low- and/or high pressure gas switch (if used).
Inspect main burner flame and follow the instruction manual for detailed service and
maintenance guidelines.
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.
Valves, fittings and pipes not pressure tight must be repaired.
Combustion chamber door, clean-out opening covers, and flanges may need to be
retightened and resealed. Do not over tighten.
Inspection and Maintenance
223