er/technician. Read and follow this manual, all supplements and related
instructional information provided with the boiler. Install, start and service the boiler only in the sequence and methods given in these
instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
Do not use the boiler during construction. Construction dust and particulate, particularly drywall dust, will cause contamination of
the burner, resulting in possible severe personal injur
e boiler can only be operated with a dust-
free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated by operation
with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
x these instructions near to the boiler/water heater. Instruct the building owner to retain the instructions for future use b
service technician, and to follow all guidelines in the User’s Information Manual.
er/technician. Read and follow this manual, all supplements and related
instructional information provided with the boiler. Install, start and service the boiler only in the sequence and methods given in these
instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
Do not use the boiler during construction. Construction dust and particulate, particularly drywall dust, will cause contamination of
the burner, resulting in possible severe personal injur
e boiler can only be operated with a dust-
free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated by operation
with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
x these instructions near to the boiler/water heater. Instruct the building owner to retain the instructions for future use b
service technician, and to follow all guidelines in the User’s Information Manual.
06/2022 Copyright Mestek, Inc.
Also read and follow:
KN-Series Gas Boiler Installation
and Operating Instructions
This instruction manual applies only to Advanced
Thermal Hydronics firmware version 4.15 on
version 3.x control boards.
To replace firmware on an existing boiler, contact
the factory for assistance.
Cast Iron Condensing Boilers
Models KN-6, KN-10, KN-16,
KN-20, KN-26 and KN-30
Models KN6+, KN10+, KN16+,
KN20+, KN26+, KN30+ and
KN40+
Control Adjustment and Operation Instructions
With Touch Screen Display
KNV3TS-06/2022
KN-Series Virtuoso 10:1
Supplement Control Manual
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