Energy Tech Laboratories MR212 - Manual (Page 13)

13
Adjust pilot flame.
Lock unit into
high fire.
Adjust
incoming gas
pressure.
Does high fire produce
at least a 70°F temp
rise and produce the
correct manifold
pressure?
Adjust high fire
No
Lock unit into low fire.
Yes
Does thin flame fill
entire burner length?
Adjust low
fire.
Setting incoming pressure:
Presure must be measured at first "T" in
supply gas line before the first gas valve.
Adjusting the pilot:
The pilot DC signal should be 12 VDC
minimum.
Adjusting high fire:
High fire manifold pressure should be 5"
maximum for natural gas and 2.5"
maximum for propane. High fire should
produce at least a 70°F temperature rise.
Remove wire #4 from the Maxitrol 14
amplifier (#2 and #4 for Maxitrol 44).
This will drive the valve into its full open
position. Adjust high fire with the
regulator inside the unit. Turn clockwise
to increase temperature rise. Ensure that
DC flame signal is minimum 12 VDC.
Replace the wires on the Maxitrol
Amplifier.
Adjusting low fire:
Remove wire #5 from the Maxitrol 14
amplifier (#8 for Maxitrol 44). This will
drive the valve into its lowest position.
Adjust the low fire by turning the low fire
bypass screw on the side of teh
modulating valve for M511 and M611
models. For MR212 valves, the low and
high fire are both under the valve cover.
Refer to the included Maxitrol literature
for more detailed information. Ensure
that DC flame signal is minimum 12 VDC
and that the enite length of burner is filled
with a thin flame.
Yes
No
No
Burner start up
complete.
Yes
Is incoming gas pressure
7"-14"?
(7"-5 psi. for size 4-5 units)
Heater Start Up Summary