I.C.E. BMA-136 HBR - Manual (Page 7)

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9. Gradually open firing valve to start main flame. Check for flame over entire burner length. Adjust the pressure
regulator to 4” or 4 ½ ” W.C. pressure or the amount of gas marked on the rating plate.
10. On all units that have Maxitrol modulation. Read over the Maxitrol literature for the high fix and low fire setting. By
removing the wire from #2 on the amplifier the unit will stay on low fire and allow you to set the by pass or low fire
setting to ensure that the flame is completely across burner and is between 1” and 1 ½ ” long.
11. To set up high fire you will require to remove wire from #4 on amplifiers. A resistor should be placed across #3 and #4
of the amplifier remove when test complete) to check out discharge sensor. The resistors are attached to the Maxitrol
literature.
11A. Check gas pressure switch setting.
High pressure gas switch …………………………………..…… 6” W.C.
Low pressure gas switch ………………………………….……. 2” W.C.
NOTE: The high and low gas pressure switches may be the manual reset type on some units.
FLAME SUPERVISION CHECK
a) The flame supervision should be checked periodically to insure that the controls are operational. With the unit on full
operation and firing, close the main manual firing valve and pilot manual firing valve. This should lock out the unit.
b) The units with more than 3 feet of burner from the point of supervision have dual flame rod and a delay timer for main
flame supervision. Closing the main firing valve should lock out the safety relay and the unit should shut-down.
c) The main safety valve should be checked for gas tightness by placing a manometer in the manifold between the safety
valve and the manual firing valve (a 1/8” plug is provided for this). If there is a build up of pressure with the unit
locked out and the manual valve closed, the safety valve should be replaced.
d) The complete gas line and manifold should be checked for gas tightness.
C.F.M.
a) This unit depends upon an adequate supply of air for good combustion and operation. Care should be taken to ensure
that properly sized inlet hood and ductwork are installed and that the unit is discharging the right amount of C.F.M.
TROUBLE SHOOTING GUIDE
On start up, the unit will not operate properly. It may be an electrical mix up in the wire from the unit to the control panel
(see wiring drawing).
The wire connector shown 12 are in the remote panel.
The wire connector shown
E12 are on the unit.
It is recommended you have a volt meter AC/DC, and a differential pressure gauge 0” - 2”
(magnehelic) and a gas pressure gauge 0” - 12”.
1. If inlet damper fails to open when system switch is pushed in.
a) Check to see if power is on #4. If no power supply starter overloads (1 OLS-1), may be open R1-1 normally
closed contacts may be open. Main flame safe guard relay needs to be reset.