Install Instructions

7.D Field Connections ..............................24
7.D.1 TB1 (Term Block 1 -TT, DHW, OAS) . 24
7.D.1.a TT (Central Heat).................................. 24
7.D.1.b DHW. ................................................... 24
7.D.1.c Field Interlocks ..................................... 24
7.D.1.d PV Terminals ....................................... 24
7.D.1.e WWSD + COM .................................... 24
7.D.1.f OAS + COM ......................................... 24
7.D.2 TB2 (for pumps and aux power) .......25
7.D.2.a Boiler Pump .......................................... 25
7.D.2.b SYS Pump ............................................ 25
7.D.2.c Aux Power ............................................ 25
7.D.3 TB3 (for optional equipment) ............ 25
7.D.3.a DHW Pump .......................................... 25
7.D.3.b DHW Aquastat ...................................... 25
7.E Wiring Connects, Power Vent and Air .. 26
7.F Wiring Diagram ..................................... 28
7.G Logic Diagram ...................................... 29
SECTION 8 THE DIGITAL DASHBOARD
8.A Getting to know the Digital Dashboard.
8.A.1 Setting the Economy Feature ............... 30
8.A.2 High Limit (High Temp) ......................... 30
8.A.3 Low Limit (Advanced Options/Adjust) .. 30
8.A.4 Control LEDs ........................................ 31
8.A.4.a ACTIVE (TEMP) ................................. 31
8.A.4.b HI TEMP .............................................. 31
8.A.4.c ACTIVE (LWCO) .................................. 31
8.A.4.d LOW WATER ....................................... 31
8.A.4.e ACTIVE (ECONOMY) .........................31
8.A.4.f TARGET ............................................. 31
8.A.5 Digital LEDs .......................................... 31
8.A.6 Ignition LEDs ........................................ 31
8.A.6.a LIMITS ................................................. 31
8.A.6.b V-PWR .................................................. 31
8.A.6.c V-SW ................................................... 31
8.A.6.d FLAME .................................................32
8.B Default Settings. ................................32
8.C Advanced Settings .............................32
8.C.1 Programming the Outdoor Sensors ...... 32
8.C.1.a Setting the Outdoor Reset .................... 32
8.C.1.b Setting Warm Weather Shutdown ........ 32
8.C.1.d Thermal Boost ......................................33
8.C.2 Degrees Fahrenheit or Celsius ............. 34
8.C.3 Manual Reset Low Water Cut-O󰀨 ......... 34
8.C.4 Low water Cut-O󰀨 ................................ 34
8.C.5 High Limit Di󰀨erential ........................... 34
8.C.6 Restore Factory Default Settings .........34
8.D TEST / SETTINGS Button ..................35
8.E Temperature and Pressure Gauge ....35
SECTION 9 INITIAL STARTUP
9.A Filling the System ................................. 36
9.B System Start Up (Seq of Operation) ..... 36
9.C Proper Pilot Flame ................................ 38
9.D Lighting Instructions Decal ................... 39
9.E System Shutdown ................................40
SECTION 10 MAINTENANCE
10.A Removing the covers and panels ......... 40
10.A.1 Access Cover Removal ...................... 40
10.A.2 Flue Collector Access .......................... 40
10.A.3 Side Panel Removal ............................ 41
10.A.4 Draft Hood Removal ........................... 41
10.B Maintenance ......................................... 42
SECTION 11 OPERATING DETAILS AND
TROUBLESHOOTING
11.A Operating Details .................................. 43
11.B Electrical Troubleshooting .................... 43
11.C Troubleshooting Table .......................... 44
11.C.1 Troubleshooting Flow Chart 1 (burners o󰀨) 45
11.C.2 Troubleshooting Flow Chart 2 (burners on) 46
SECTION 12 REPLACEMENT PARTS
12.A Parts Illustrations .................................. 47
12.B Parts List ..............................................49
12.C Accessories List ...................................50
12.D Glossary of Terms................................. 51
MINI-THERM JX Residential Boilers
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