Operating instructions

This publication was correct at the time of going to print. However, Espar Inc. has a policy of continuous improvement
and reserves the right to amend any specifications without prior notice.
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Introduction Heater Warnings .............................................. 3
Technical Data Hydronic M8 Biodiesel .............................................. 4
Technical Data Hydronic M10 ............................................. 5
Technical Data Hydronic M12 .............................................. 6
Heater Components .............................................. 7
Principal Dimensions .............................................. 8
Installation Procedures Heater Location / Mounting/ Fastening .............................................. 9
Heater & Engine Plumbing
.............................................. 10
Fuel Quality .............................................. 11
Fuel System .............................................. 12
Electrical Connections .............................................. 14
Exhaust / Intake Connections .............................................. 15
Operating Switches: 7 Day Timer .............................................. 16
Push/Pull Switch, Programmable Timer .............................................. 18
Heater Operation Pre-Start Procedures / Start-Up .............................................. 20
Heating Mode /
Termperature Drop .............................................. 20
Switching Off /Safety Equipment .............................................. 20
Heater Wiring .............................................. 21
Parts List for Wiring Diagram .............................................. 22
Heater Wiring Diagram .............................................. 23
Controler wireing diagrams .............................................. 24
Maintenance, Periodic Maintenance .............................................. 25
Troubleshooting & Basic Troubleshooting / Self Diagnostics .............................................. 25
Repairs Fault codes / Description / Repair
.............................................. 26
Repair Instructions .............................................. 30
Repair Steps .............................................. 31
Fuel Quantity .............................................. 47
Heater Components Parts Diagram .............................................. 48
Descr
iption & Part #’s .............................................. 49
Parts Diagram - Boxed units .............................................. 50
Description & Part #’s .............................................. 51
Special Notes
Note: Highlight areas requiring special attention or clarification.
Caution : Indicates that personal injury or damage to equipment may occur unless specific guidelines are followed.
Warning: Indicates that serious or fatal injury may result if specific guidelines are not followed.