Table Of Contents - Weil-McLain ULTRA ULTRA-105 Service Manual

Table of Contents

Contents2
Hazard Definitions3
Please Read Before Proceeding3
Field Wiring4
Line Voltage Connections4
Low Voltage Connections4
Outdoor Temperature Sensor4
Startup6
Set Space Heating Operation6
Check Dhw Operation Setup6
Set Dhw Target Temperature6
Verify Operation — Dhw7
Operating Information7
Re-Install Boiler Jacket Front Door7
Operating Instructions8
Safety Information8
To Turn Off Gas To The Appliance8
For Your Safety Read Before Operating8
What To Do If You Smell Gas8
Ultra Phd Control Module9
Electrical Specifications9
Boiler Temperature Regulation9
Low Water Protection9
Suggested Outdoor Reset Parameter Settings10
Supply Temperature Boost10
Boiler Circulator10
Freeze Protection/External Controls (Interlocks)10
Schematic Wiring Diagram11
Ladder Wiring Diagram12
Ultra Display Overview15
Ultra Display Standby Mode — Key Functions & Display16
Ultra Display Standby Mode — Boiler Sequence Display17
Ultra Display Parameter Mode18
Parameter Reference Table19
Ultra Display Information Mode20
Ultra Display Hard Lockout Mode21
Troubleshooting22
Verify Proper Operation After Servicing22
Necessary Checks22
Checking Temperature Sensors23
Review Of Last Lockout Code Message23
To Access Parameters23
To View The Last Lockout Code23
Boiler Not Firing24
When Display Shows Soft Lockout Code26
Hard Lockout Condition28
When Display Shows Hard Lockout Code28
Flame Detected On Startup28
Ignition Failed Through 5 Attempts28
Spark Occurs, But No Flame28
Flame Occurs, But Flame Signal Strength Is Low29
Ignition Failure Or Gas Valve Electrical Problem29
Voltage Lost After Lockout Occurred30
Internal Control Or Display Error30
Gas Valve Relay Error30
Internal Control Failure30
Thermal Overrun Condition31
Outlet Water Temperature Above 210 Degrees F31
Return Water Temperature Above 210 Degrees F31
Blower Not Running31
Temperature Rise Across Boiler Over 58 Degrees F, Occurred 20 Times32
Outlet Water Temperature Sensor Short Circuit32
Return Water Temperature Sensor Open Circuit32
Flue Temperature Exceeded 225 Degrees F32
Boiler Maintenance Procedure33
Tools And Test Equipment Required For Maintenance Procedure33
Burner Access And Assembly37
Nuts Tightening Sequence37
Combustion Testing And Adjustment38
Check Flame & Combustion with Instruments38
Throttle Screw Location38
Throttle Screw Adjustment Procedure40
Adjust And Test Boiler Controls40
Ultra Control Module Parameters41
Default Parameter Settings41
When To Change Parameters41
Typical Parameter Changes41
How To Set Parameters42
Using The Boiler Display42
Parameter Explanations44
Outdoor Reset Operation44
Outdoor Reset Curve And Control Module Parameters45
Typical Reset Curves45
Automatic Temperature Boost46
Maximum Fan Speed47
Minimum Fan Speed47
Space Heating Max Fan Speed47
Dhw Max Fan Speed47
Firing Rates And Corresponding Blower Speeds48
Ignition Fan Speed48
Differential (Hysteresis) Settings49
Space Heating Differentials49
Setting "OFF" Differential49
Not Recommended58
Recommended Setting58