Laars MASCOT LX Manuals

Manuals and User Guides for Laars MASCOT LX. We have 3 Laars MASCOT LX manuals available for free PDF download: Service Manual, Installation And Operation Instructions Manual, User Manual

Laars MASCOT LX Installation And Operation Instructions Manual (56 pages)

Brand: Laars | Category: Boiler | Size: 3.33 MB

Table of Contents
2
Section 1.

4
General Information

4
- Introduction
  5
- To Open the Mascot LX
  5
- Rating Plate
  5
- Model Nomenclature
  5
- Mascot LX Overview
  6
- Start up / Shut down Instruction (Decal)
  7
- Dimensions for All Sizes
  8
- Unpacking
  10
- Warranty
  10
Section 2.

11
Locating the Appliance

11
- Correct Vent Distance from Outside Wall or Roof Termination
  11
- Wall Mount Hole Locations
  12
Section 3.

13
Venting and Combustion Air

13
- Combustion Air
  13
- Combustion Air from Room
  13
- Ducted Combustion Air
  14
- Venting (Exhaust)
  14
- About Common Venting
  16
- Locating Vent & Combustion Vent Terminals
  17
- Side Wall Vent Terminal
  17
- Side Wall Combustion Air Terminal
  17
- Vertical Vent Terminal
  19
- Vertical Combustion Air Terminal
  19
- Installations in the Commonwealth of Massachusetts
  19
- Common Vent Test
  20
Section 4.

21
Gas Supply and Piping

21
Section 5.

22
Pump Capacity

22
- Mascot LX Heating System Pump Capacity
  22
Water Connections

23
Section 6.

23
- Central Heat System Piping
  23
- Cold Water Make-Up
  23
  - Freeze Protection
    23
- Recognized Chemicals
  23
- Domestic Hot Water Piping (DHW and MLXC)
  23
- Indirect Water Heater Piping
  23
- Condensate Drain
  24
- Piping Schematics
  25
Section 7.

31
Electrical Connections

31
- Main Power
  31
- Pump Connections
  31
- 24Vac Transformer Circuit Breaker
  31
- Central Heat - Call for Heat
  31
- Outdoor Air Temperature Sensor
  31
- Domestic Hot Water Connection
  31
- System Sensor
  31
  - (Lead Lag/Cascading Operation Only)
    31
- External Control Connections
  31
- Ladder Diagram, Connections, and Wiring Diagrams
  32
Section 8.

35
CONTROL Setup and Operation

35
- Digital Display
  35
- CONTROLLER Modes
  36
- User Mode
  37
- Installer Mode
  38
- Service Mode
  39
- Modulation Control
  39
- Pump Control
  39
Section 9.

40
- High Limit
  40
- Stack Temperature
  40
- Domestic Hot Water Temperature
  40
OPERATION Modes

40
Section 10.

43
Set up Instructions

43
- Filling the Boiler System
  43
- Starting the Burner after Set up
  43
- Burner Operation
  43
- Boiler Setup and Adjustment
  44
- Shutting down the Mascot LX
  44
- To Restart the Mascot LX
  44
Section 11.

46
Maintenance

46
- System Maintenance
  46
- Appliance Maintenance and Component Description
  46
- Burner
  46
- Appliance Control
  46
- Ignitor Assembly
  47
- Flame Sensor
  47
- Blower
  47
- Heat Exchanger Coils
  47
- Gas Conversion
  48
Section 12.

49
Troubleshooting

49
- Sequence of Operation
  49
- Short Cycling
  49
- Error Codes
  50
Section 13.

52
Replacement Parts

52
- Exploded Parts Illustrations
  52

Laars MASCOT LX Service Manual (94 pages)

Brand: Laars | Category: Industrial Equipment | Size: 8.27 MB

Table of Contents
3
How to Use the Troubleshooting Information
7
Identifying Your Unit
7
Finding Information in this PDF File
8
Safety Notes
9
Removing the Covers
12
Part Locations
13
Sensor and Switch Locations
14
Access to Control Board
15
Control Panel
16
Control Display
17
Operating Displays
18
Operating Displays - Examples
19
Notifications, Blocking, Lockout, And Error Displays
20
Changing Setpoints
22
Installer and Service Mode Displays
23
Quick Checkout Procedure
25
A2 Lockout Codes
28
Notification Codes
33
Unit Is Running, But Building Is Still Cold
35
Short-Cycling
36
Unit Is Noisy
37
Troubleshooting the 120V AC Power Supply
39
Troubleshooting the 24V DC Power Supply
41
Inlet Water Temperature Sensor
42
Outlet Water Temperature Sensor
43
System Sensor
44
DHW Sensor
44
Outdoor Sensor
44
Flue Temperature and Flue Safety Sensors
45
Testing the Temperature Sensors
47
Water Pressure Switch
48
Blower Problems
49
Air Pressure Switch
51
Gas Valve
53
Condensate Trap
54
Pressure Relief Valve
55
Direct Spark Ignition
56
Pump Problems
58
Outdoor Reset
59
Low Water Cutoff Switch
61
DHW Problems - Combi Units (MLXC)
63
DHW Temperature Sensor
64
DHW Flow Sensor (Hall Sensor)
65
Three-Way Valve
66
Flat Plate Heat Exchanger
67
Hot Water Problems - Indirect Tank (MLXH)
68
B26 DHW Problems - Indirect Tank with Aquastat (MLXH)
69
B27 DHW Problems - Indirect Tank with Sensor (MLXH)
70
Cascade Setup
71
External Modulation Control (BMS)
72
Replacing the SIT Control Board
73
Annual Service Procedure
75
Section C - Combustion Setup
77
C1 about Correct Combustion
77
Combustion Adjustment Procedure
78
Troubleshooting Combustion Problems
80
Cleaning the Burner and Heat Exchanger
81
Appendix Sect. Title Page App1 SIT Parameter Codes
83
Lockout Codes
83
Blocking Codes
83
Notification Codes
84
Installer Mode Parameters
85
App2 Ignition And Firing Sequence
88
App3 Wiring Diagrams
89
App4 Gas Conversion Procedure
92

Laars MASCOT LX User Manual (8 pages)

Wall-Mounted, Modulating Boiler

Brand: Laars | Category: Boiler | Size: 1.56 MB

Laars Categories

Boiler Water Heater Industrial Equipment Swimming Pool Heater Heater

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Laars MASCOT LX Manuals

Laars MASCOT LX Installation And Operation Instructions Manual (56 pages)

Table of Contents

Section 1.

General Information

Section 2.

Locating the Appliance

Section 3.

Venting and Combustion Air

Section 4.

Gas Supply and Piping

Section 5.

Pump Capacity

Water Connections

Section 6.

Section 7.

Electrical Connections

Section 8.

CONTROL Setup and Operation

Section 9.

OPERATION Modes

Section 10.

Set up Instructions

Section 11.

Maintenance

Section 12.

Troubleshooting

Section 13.

Replacement Parts

Laars MASCOT LX Service Manual (94 pages)

Table of Contents

Laars MASCOT LX User Manual (8 pages)

Table of Contents

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