Lochinvar KNIGHT 400 User Manual

Service Manual
Models: 400 - 801
This manual must only be used
by a qualified heating installer /
service technician. Read all
instructions, including this manual
and the Knight XL 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.
KBXII-SER Rev C

Lochinvar KNIGHT 400 Specifications

General

Brand	Lochinvar
Model	KNIGHT 400
Category	Boiler
Language	English

Summary

Service

System Piping and Display Interface

Details near boiler piping and the Knight XL display panel interface.

Control Module and General Operation

Covers control module inputs/outputs, general boiler operation, and access modes.

Panel Access and Parameter Table

Procedures for accessing panel menus, parameters, and the comprehensive parameter table.

Operational Settings and Functions

Covers time, date, temperature settings, data logging, and operational functions.

Operational Modes and Control

Details DHW operation, outdoor reset, anti-cycling, and control mode selections.

Ancillary Systems and BMS Integration

Configuration for pumps, BMS integration, and service notifications.

Maintenance

Service and Maintenance Schedules

Outlines daily, monthly, and periodic maintenance tasks for technicians and owners.

Boiler Component Servicing

Covers servicing for pipes, condensate trap, water system, electrodes, wiring, burner, and heat exchanger.

Combustion Analysis and Gas Valve Adjustment

Guides for performing combustion analysis and adjusting the gas valve.

Troubleshooting

Control Module Fuse Checks

Instructions for checking and replacing control module fuses.

Troubleshooting Fault Messages

Guides for diagnosing and resolving various boiler faults and error messages.

Combustion Analysis Troubleshooting

Procedures and charts for diagnosing combustion issues.