Lanair MX 75 User manual

Installation & Operation
Manual
Multi-Fuel Waste-Oil Heater
Model MX 75
115V/60Hz
Lanair Products LLC
4109 Capital Circle
Janesville, WI 53546
www.lanair.com
1-888-370-6531
Item #: 81010044 Rev C
Issue Date: 30 March 2021

i
Call 1-888-370-6531 for Technical Support
Before You Begin…
Caution!
Before you begin installation and operation
of your heater, read this manual completely,
and save it for future reference!
IMPROPER INSTALLATION, OPERATION, OR
MAINTENANCE OF THE HEATER SYSTEM CAN CREATE
HAZARDOUS CONDITIONS AND WILL VOID THE
WARRANTY
•This heater is UL listed for commercial and industrial use only.
•Refer to safety information and precautions in this manual.
•Installation of the unit shall be made in accordance with all state and local codes which
may differ from information provided in this manual. Installations in Canada shall be in
accordance with the regulations of authorities having jurisdiction and installation
practice shall be made according to CSA standard B139, Installation Code for Oil
Burning Equipment.
•Product improvements are occurring regularly, so the products may vary slightly from
what is shown in this manual.
•If you have any questions or concerns during the installation or operation of the heater,
contact your local service representative or Lanair.
Thank you for purchasing a Lanair heater. Record your Unit I.D. number below for future
reference.
Unit I.D. #:
(Number located on the
side of the cabinet)
Installed By:
(Service Company, Address,
Contact Name, Phone Number)
Date of Installation:

Table of Contents
Before You Begin… ......................................................................................................................... i
1. Safety, Codes and Regulations................................................................................... 1
1.1 General Warnings ............................................................................................................ 1
1.2 Safety Hazards................................................................................................................. 2
1.3 Codes and Regulations .................................................................................................... 0
1.4 Fuels and Fuel Management............................................................................................ 1
1.5 Clearances to Combustible Surfaces ............................................................................... 2
2. Installation ..................................................................................................................... 3
2.1 Technical Guidelines........................................................................................................ 3
2.2 Heater Placement ............................................................................................................ 3
2.3 Drain Valve Installation .................................................................................................... 4
3. Exhaust Flue System Installation ............................................................................... 5
3.1 Barometric Damper Tee Installation ................................................................................. 5
3.2 Flue Piping Installation ..................................................................................................... 5
3.3 Draft Gauge Installation.................................................................................................... 8
4. Electrical System Installation...................................................................................... 9
4.1 Wall Thermostat (Standard) ............................................................................................. 9
4.2 Main Electrical Connection............................................................................................. 10
5. Startup and Operation................................................................................................ 11
5.1 Do’s and Don’ts/Tech Tips ............................................................................................. 11
5.2 Burner Primary Control Operation .................................................................................. 11
5.3 Safety Systems and Warnings ....................................................................................... 12
5.4 Heater Startup................................................................................................................ 13
5.4.1 Priming and Starting the Heater ..................................................................................... 13
5.4.2 Burner System Checkout ............................................................................................... 14
5.5 Everyday Operation of Your Used Oil Heater ................................................................. 17
6. Maintenance................................................................................................................. 18
6.1 Safety Warnings – Lockout/Tagout................................................................................. 18
6.2 Monitoring System Performance over Time.................................................................... 18
6.3 Maintenance Procedures ............................................................................................... 19
6.3.1 Heat Exchanger Cleaning .............................................................................................. 20
6.3.2 Fan Cleaning.................................................................................................................. 22
6.3.3 Nozzle Line Assembly Cleaning ..................................................................................... 23
6.3.4 Air Compressor Maintenance ......................................................................................... 27

6.3.5 Oil Filter Cleaning........................................................................................................... 29
7. Troubleshooting .......................................................................................................... 30
8. Appendices .................................................................................................................. 32
8.1 Wiring Diagram .............................................................................................................. 32
8.2 Primary Control Instructions ........................................................................................... 34
8.3 Chimney Flue Installation Instructions ............................................................................ 38
8.4 Heater Specifications ..................................................................................................... 42
8.5 75H Heater Maintenance Schedule and Log.................................................................. 43
8.6 Limited Warranty............................................................................................................ 44