Lochinvar KNIGHT 81-286 User Manual

Service Manual
Models: 81 - 286
This manual must only be
used by a qualified heating
installer / service technician.
Read all instructions,
including this manual and the
Knight Boiler Installation and
Operation Manual, before
installing. Perform steps in
the order given. Failure to
comply could result in severe
personal injury, death, or
substantial property damage.
 WARNING
Save this manual for future reference.
KBII-SER Rev C

Lochinvar KNIGHT 81-286 Specifications

General

Brand	Lochinvar
Model	KNIGHT 81-286
Category	Boiler
Language	English

Summary

Hazard definitions

Please read before proceeding

Service

Near boiler piping

Details typical system components for boiler piping.

The Knight boiler display

Explains display panel readouts, buttons, and functions.

Parameter table

Lists SMART SYSTEM control module parameters and access methods.

DHW Settings

Covers parameters related to Domestic Hot Water (DHW) settings.

Maintenance

Maintenance and annual startup

Outlines service and maintenance schedules for technicians and owners.

Clean condensate trap

Step-by-step instructions for cleaning the condensate trap.

Flue vent system and air piping

Inspects flue gas venting and air piping for issues.

Cleaning boiler heat exchanger

Provides steps and materials for cleaning the heat exchanger.

Troubleshooting

Check control module fuses

Instructions for checking and replacing control module fuses.

Troubleshooting Chart - No Display

Identifies causes and corrective actions for 'No Display' faults.

Checking temperature sensors

Provides resistance values for boiler sensors at various temperatures.

Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

Details fault messages and their corrective actions.

Combustion Analysis Procedure

Step-by-step guide for analyzing boiler combustion.