Hazard definitions, Contents please read before proceeding – Lochinvar ArmorX2 1.5 User Manual
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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 ......................... 2
Handling Ceramic Fiber Materials ...................................... 3
 When servicing water heater ........................................ 3
 Water heater operation ................................................ 3
 Heater water ................................................................. 3
 Freeze protection fluids ................................................ 3
WHAT IS IN THIS MANUAL .............................................. 4
1. SERVICE
The Armor X2 Water Heater Display ................................. 5
 Control Inputs ............................................................... 6
 Control Outputs ............................................................. 7
 General Operation ........................................................ 8
Sequence of Operation ...................................................... 9 
Parameter Table.......................................................... 10-11
Viewable and Changeable Control Parameters .......... 12-31 
2. MAINTENANCE
Maintenance and Annual Startup ................................ 32-36
3. TROUBLESHOOTING
Alarm Screen.................................................................... 37
Before Troubleshooting .................................................... 38
Check Control Module Fuses .......................................... 38
 Table 3A - Troubleshooting Chart - No Display ......... 39
Checking Temperature Sensors ...................................... 40
 Table 3D - Troubleshooting Chart - Noisy System ..... 41
 Table 3E - Troubleshooting Chart - Fault Messages 42-48
Combustion Analysis Procedure ...................................... 49
 Table 3F - Troubleshooting Chart - Combustion Levels 49 
 Table 3G - Flue Products ........................................... 49 
Gas Valve Adjustment Procedure .................................... 50
Revision Notes .................................................. Back Cover
Contents
Please read before proceeding
Installer – Read all instructions, 
including this manual and the Armor 
X2 Installation and Operation Manual, 
before installing. Perform steps in the 
order given.
User – This manual is for use only by 
a qualified heating installer/service 
technician. 
Have this water heater serviced/inspected 
by a qualified service technician at least 
annually.
Failure to comply with the above could 
result in severe personal injury, death or 
substantial property damage.
When calling or writing about the water 
heater – Please have the water heater model 
and serial number from the water heater 
rating plate.
Consider piping and installation when 
determining water heater location (see 
the Armor X2 Installation and Operation 
Manual).
Any claims for damage or shortage 
in shipment must be filed immediately 
against the transportation company by the 
consignee.
ƽ WARNING
NOTICE
