Service manual

A DJM3.2 MANUAL
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LOW FIRE COMBUSTION BLOWER SPEED
 at 10:1 turndown is about 1250 RPM ±10 RPM (20.8 Hz)
 at 15:1 turndown is about 1175 RPM ±10 RPM (19.91 Hz)
HIGH FIRE COMBUSTION BLOWER SPEED is about 3400 RPM
LIGHT OFF SPEED is about 2300 RPM
Maxitrol Modulating Gas Valve Voltages
The different Maxitrol valves modulate through about the following voltages:
M650 or M651 2 - 13 VDC
M550 or M520 2 - 12 VDC
M450 or M420 2 - 11 VDC
MR212 2 - 11 VDC
XXV. VALVE DRAWINGS
Page 44 Revised: 3/11/99