Laars JX125NLXU1 Manuals

Manuals and User Guides for Laars JX125NLXU1. We have 1 Laars JX125NLXU1 manual available for free PDF download: Installation And Operation Instruction Manual

Laars JX125NLXU1 Installation And Operation Instruction Manual

Laars JX125NLXU1 Installation And Operation Instruction Manual (52 pages)

Residential Gas-Fired Hydronic Boilers

Brand: Laars | Category: Boiler | Size: 5 MB

Table of Contents

Table of Contents
2
SECTION 1 GENERAL INFORMATION 1.A Introduction
4
B Warranty
4
C Model Number and Nomenclature
4
D Safety Warnings
5
E Model Overview
6
F Pressure Gauge
8
G Digital Dashboard
8
H the Installation Kit
8
I Accessory Kits Available
8
J Dimensions
8
Section 2 Locating the Boiler
10
A Field Assembly
10
B Boiler Placement
10
C Clearances
10
Section 3 Air and Venting
11
A Safety Warnings
11
B Combustion Air Supply
12
C Venting
13
Vertical Venting - Category I
14
Locations for Vent Pipe Terminator
15
Venting with a Power Venter
16
G Common Vent Test
16
Section 4 Gas Connections
17
A Gas Supply and Piping
17
LP Gas Conversion Kit
18
Special Precautions for LP Gas
18
Pump Sizing with Low Loss Header and an Integral Pump
19
Low Loss Header
19
SECTION 6 WATER CONNECTIONS 6.A Water Piping
20
B Oxygen Permeable Systems
20
Anti-Freeze
20
Typical Plumbing Diagrams
21
ELECTRICAL and WIRING DIAGRAMS Safety Warnings
23
Main Power, 120V / 15 Amp Circuit
23
Outdoor Sensor
23
Field Connections

24
TB1 (Term Block 1 -TT, DHW, OAS)

24
- D.1.A TT (Central Heat)
  24
- D.1.B DHW
  24
- D.1.C Field Interlocks
  24
- D.1.D PV Terminals
  24
- D.1.E WWSD + COM
  24
- D.1.F OAS + COM
  24
TB2 (for Pumps and aux Power)

25
- D.2.A Boiler Pump
  25
- D.2.B SYS Pump
  25
- D.2.C aux Power
  25
- TB3 (for Optional Equipment)
  
  25
  - D.3.A DHW Pump
    25
  - D.3.B DHW Aquastat
    25
  - Wiring Connections, Power Vent and Air
    26
  - Wiring Diagram
    28
  - Logic Diagram
    29
Getting to Know the Digital Dashboard

30
- Section 8 the Digital Dashboard
  30
- The Hi Limit Dial (Program Select)
  30
- The lo Limit Dial (Advanced Programing)
  30
- A.5.A TS ACTIVE (TEMP)
  31
- A.5.B HIGH TEMP
  31
  - A.5.C LWS ACTIVE (LWCO)
    31
- A.5.D LOW WATER
  31
- A.5.E TEMP ACTIVE (ECONOMY)
  31
- A.5.F TEMP TARGET
  31
  - Digital Leds
    31
- Control Leds
  31
- Economy Dial (no Outdoor Sensor Needed)
  31
- Mode
  31
- A.7.A LIMITS
  32
- A.7.B V-PWR
  32
- A.7.C V-SW
  32
- A.7.D FLAME
  32
B Advanced Programing

32
- B.2.A RESET, Manual or Automatic
  32
- Fahrenheit or Celsius
  32
- Ignition Leds
  32
- Low Water Cut-Off
  32
- B.2.B Testing Low Water Cut off
  33
C Sensor Programming

33
- High Limit Differential
  33
- Outdoor Sensors
  33
- Setting Warm Weather Shutdown
  33
- Adjusting Outdoor Reset Ratio
  34
- C.4.A Outdoor Reset
  34
- Thermal Boost Function
  34
- C.4.B Thermal Targeting
  35
D Restore Factory Default Settings

35
- DHW Functionality
  35
E View Current Settings

35
- A Filling the System
  36
- B System Start up (Seq of Operation)
  36
- Section 9 Initial Startup
  36
- C Proper Pilot Flame
  38
- D Lighting Instructions Decal
  39
- Access Cover Removal
  40
- E System Shutdown
  40
- Flue Collector Access
  40
- SECTION 10 MAINTENANCE 10.A Removing the Covers and Panels
  40
- Draft Hood Removal
  41
- Side Panel Removal
  41
- B Maintenance
  42
- A Operating Details
  43
- B Electrical Troubleshooting
  43
- Operating Details and Troubleshooting
  43
- C Troubleshooting Table
  44
- D Troubleshooting Flow Charts
  45
- Troubleshtng Flow Chart 1 (Burners Off)
  46
- Troubleshtng Flow Chart 2 (Burners On)
  46
- E Glossary of Terms
  47
- A Parts List
  48
- B Accessories List
  50

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