Laars MINI-THERM JX-75 Series Manuals

Manuals and User Guides for Laars MINI-THERM JX-75 Series. We have 1 Laars MINI-THERM JX-75 Series manual available for free PDF download: Installation And Operation Instructions Manual

Laars MINI-THERM JX-75 Series Installation And Operation Instructions Manual

Laars MINI-THERM JX-75 Series Installation And Operation Instructions Manual (52 pages)

Residential Gas-Fired Hydronic Boilers Sizes 50-200 MBTU/h

Brand: Laars | Category: Boiler | Size: 5.1 MB

Table of Contents

Table of Contents
2
SECTION 1 GENERAL INFORMATION 1.A Safety Warnings
4
B Introduction
6
C Warranty
6
Model Number and Nomenclature
6
E Model Overview
7
F Dimensions
9
G the Installation Kit
10
H Accessory Kits Available
10
SECTION 2 LOCATING the BOILER 2.A Field Assembly
10
B Boiler Placement
10
C Clearances
10
SECTION 3 AIR and VENTING 3.A Safety Warnings
11
B Combustion Air Supply
12
C Venting
13
D Vertical Venting - Category I
14
E Locations for Vent Pipe Terminator
15
F Venting with a Power Venter
16
G Common Vent Test
16
SECTION 4 GAS CONNECTIONS 4.A Gas Supply and Piping
17
BLP Gas Conversion
18
C Special Precautions for LP Gas
18
Section 5 Pump Requirements
19
A Pump Sizing
19
SECTION 6 WATER CONNECTIONS 6.A Water Piping
20
B Low Loss Header
20
C Chilled Water Systems
20
D Oxygen Permeable Systems
20
E Anti-Freeze
20
Typical Plumbing Diagrams
21
AND Safety Warnings
23
B Main Power, 120V
23
C Outdoor Sensor
23
D 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
- E Wiring Connects, Power Vent and Air
  26
- F Wiring Diagram
  28
- G Logic Diagram
  29
- Section 8 the Digital Dashboard
  30
A Getting to Know the Digital Dashboard

30
- Setting the Economy Feature
  30
- High Limit (High Temp)
  30
- Low Limit (Advanced Options/Adjust)
  30
- A.4.A ACTIVE (TEMP)
  30
- A.4.B HI TEMP
  30
- A.4.C ACTIVE (LWCO)
  30
- Control Leds
  31
- A.4.D LOW WATER
  31
- A.4.E ACTIVE (ECONOMY)
  31
- A.4.F TARGET
  31
- Digital Leds
  31
- Ignition Leds
  31
- A.6.A LIMITS
  31
- A.6.B V-PWR
  31
- A.6.C V-SW
  31
- A.6.D FLAME
  32
B Default Settings

32
C Advanced Settings

32
TEST/SETTINGS Button

35
E Temperature and Pressure Gauge

35
- Section 9 Initial Startup
  36
- A Filling the System
  36
- B System Start up (Seq of Operation)
  36
- C Proper Pilot Flame
  38
- D Lighting Instructions Decal
  39
- E System Shutdown
  40
- SECTION 10 MAINTENANCE 10.A Removing the Covers and Panels
  40
- Access Cover Removal
  40
- Flue Collector Access
  40
- Side Panel Removal
  41
- Draft Hood Removal
  41
- B Maintenance
  42
- Operating Details and Troubleshooting
  43
- A Operating Details
  43
- B Electrical Troubleshooting
  43
- C Troubleshooting Table
  44
- Troubleshooting Flow Chart 1 (Burners Off)
  45
- Troubleshooting Flow Chart 2 (Burners On)
  46
- A Parts Illustrations
  47
- B Parts List
  49
- C Accessories List
  50
- D Glossary of Terms
  51

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