Table Of Contents; Contents; Hazard Definitions - Lochinvar FTXL 400 Series Service Manual

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 FTXL Display .............................................................. 7
Control Inputs ............................................................... 8
Control Outputs ............................................................. 9
General Operation ...................................................... 10
Sequence of Operation .................................................... 11
Display Panel Menu Access ............................................ 12
Parameter Table.......................................................... 13-15
Initial Setup ...................................................................... 16
Viewable and Changeable Control Parameters .......... 17-28

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.
⚠ DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
⚠ WARNING
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.
⚠ CAUTION
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
CAUTION
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
NOTICE
related to personal injury or property damage.
2

Contents

2. MAINTENANCE
Maintenance and Annual Startup ................................ 29-34
3. TROUBLESHOOTING
Before Troubleshooting .................................................... 35
Check Control Module Fuses .......................................... 35
Table 3-1 - Troubleshooting Chart - No Display .............. 36
Checking Temperature Sensors ...................................... 37
Table 3-3 - Troubleshooting Chart - Noisy System ......... 38
Table 3-4 - Troubleshooting Chart - Fault Messages . 39-47
Table 3-5 - Flue Products ................................................ 48
Table 3-6 - Troubleshooting Chart - Combustion Levels 48
Gas Valve Adjustment Procedure .................................... 49
Revision Notes .................................................. Back Cover