Lochinvar 400-801 - Manual (Page 2)

2
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or
to important information concerning the life of the product.
ƽ DANGER
ƽ WARNING
ƽ CAUTION
CAUTION
NOTICE
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.
CONTENTS ........................................................................ 2
Hazard Definitions .............................................................. 2
PLEASE READ BEFORE PROCEEDING ........................ 3
Handling Ceramic Fiber Materials ...................................... 3
When servicing boiler ................................................... 4
Boiler operation ............................................................ 4
Boiler water ................................................................... 4
Freeze protection fluids ................................................ 4
WHAT IS IN THIS MANUAL .............................................. 5
1. SERVICE
Near Boiler Piping .............................................................. 6
The Knight XL Display ....................................................... 7
Control Inputs ............................................................... 8
Control Outputs ............................................................. 9
General Operation ...................................................... 10
Sequence of Operation ............................................... 11-12
Display Panel Menu Access ............................................ 13
Display Panel Parameter Access ..................................... 14
Parameter Table.......................................................... 15-17
Viewable and Changeable Control Parameters .......... 18-26 2. MAINTENANCE
Maintenance and Annual Startup ................................ 27-32
3. TROUBLESHOOTING
Before Troubleshooting .................................................... 33
Check Control Module Fuses .......................................... 33
Table 3-1 - Troubleshooting Chart - No Display .............. 34
Checking Temperature Sensors ...................................... 35
Table 3-3 - Troubleshooting Chart - Noisy System ......... 36
Table 3-4 - Troubleshooting Chart - Fault Messages . 37-46
Combustion Analysis Procedure ...................................... 46
Table 3-5 - Flue Products ................................................ 46
Table 3-6 - Troubleshooting Chart - Combustion Levels 46
Gas Valve Adjustment Procedure .................................... 47
Revision Notes .................................................. Back Cover
Contents