User Guide

Field Service Checklist
22
© Copyright 2007, Maxitrol Company. All Rights Reserved.
Observed Problem: Possible Cause: Remedy:
G.
Incorrect high re.
1. Inlet pressure too
low.
1. Read pressure at
inlet to modulating
valve using a
manometer with
unit operating at
full re. Pressure
should be equal to
the sum of outlet
pressure setting
plus pressure drop
of the valve. See
Maxitrol’s Capacity
Chart, M-MR.MT.
EN, (pg. 7).
Increase inlet
pressure if possible.
2. Incorrect outlet
pressure
adjustment of
Pressure Regulator.
2. Read manifold
pressure using
manometer and
compare with
recommendation
of equipment
manufacturer.
See Valve
Adjustments
(pg.29) for high re
adjustment.
H.
Erratic or pulsating
ame.
1. Hunting. 1. Increase bandwidth
setting. See
Operation Menu
programming on
(pg. 13).
If ame stabilizes,
reduce bandwidth
to the minimum
setting where a
stable ame can be
maintained.