Page 1
General Information
TOOLS
The tools in this list should be considered the minimum required for
performance of routine maintenance, servicing and minor repair work.
•
Spanner sizes 11/32, 9/16, 5/8, 7/8, 15/16, 1 3/8
•
Socket sizes ¼, 5/16, 7/16, 11/32
•
Adjustable crescent spanner
•
Phillips head screwdriver No. 2
•
Flat head screwdriver
•
Pliers – vice grip
•
Pliers – needle nose
•
Multimeter
MAXIMUM TORQUE VALUES
The fasteners used to assemble this heater are all US thread size. Most
threaded fasteners should be tightened to a specific torque value. Over
tightening the fastener can weaken it and cause it to break, while under
tightening can cause it to eventually come loose. Below is a table with
the specific torque values for each type of bolt/screw used in this heater.
Be sure to follow the recommendations closely.
Table 1: Fastener Torque values
U.S. Thread Size
Ft-lbs
In-lbs
Nm
#8 2 24 3
#10 3 36 4.5
¼-20
6 to 9
72 to 108
9 to 12
3/8-16
22 to 32
264 to 384
30 to 43
Summary of Contents for SCH25
Page 6: ...Page 2...
Page 9: ...Page 5 BURNER COUNTERFLOW TUBE COMBUSTION CHAMBER NOZZLE...
Page 16: ...Page 12 Figure 3 Wiring Diagram...
Page 34: ...Page 30...
Page 41: ...Page 37 Appendices Appendix 1 Technical Bulletins...
