Nortec 132-3091 manual Built on and Remote Mounted Blower Packs BOBP’s / RMBP’s, Starting Point

This feature will reduce the possibility of corrosion of the electrodes and the possible accumulation of algae and bacteria growing in the cylinder.

BUILT ON AND REMOTE MOUNTED BLOWER PACKS (BOBP’s / RMBP’s)

FAN MOTOR OILING: The blower pack fan motor requires occasional oiling of motor bearings. To do this, open up the blower pack top and oil the motor with ten drops of SAE-20 grade motor oil. Refer to Figure #6 for oiling slots. It is important to oil the fan motor every four months to preserve long life and to maintain the fan’s warranty. It is not necessary to disassemble the fan/motor assembly. The exploded view is for visual purposes only.

TROUBLESHOOTING

PLEASE READ THIS SECTION BEFORE REFERENCING SPECIFIC DIAGNOSTIC MESSAGES.

1.Ensure the installation detail conforms with the recommendations contained in the Installation Manual, Form #XX-161.

2.Understanding the Principle of Operation is an asset when troubleshooting. This information is readily available from your local representative.

3.When contacting your local representative or NORTEC, for troubleshooting assistance, please ensure the serial number has been obtained for reference purposes.

4.Whenever the troubleshooting steps indicate a problem with the main pc-board, first check all connections at the main pcb (including the ribbon cable connections at the center of the main pcb) before ordering replacements.

STARTING POINT

If nothing is working, check for 24 VAC output from the stepdown transformer (see wiring diagram). If there is no 24 VAC output, the transformer might have been damaged if external controls were installed and/or connected with the field-supplied fused disconnect on. If this is the case, the transformer must be replaced.

The conductivity of the water within the cylinder must be controlled, in order for the humidifier to function properly. The fill and drain rates must be maintained. Filling too quickly can cause over-amping and automatic shutdown or blown fuses. Filling too slowly can cause insufficient steam output and humidity levels. Water supply pressure should be between 30 and 80 psig, ideally 55 to 60 psig. Draining too slowly can cause over-concentration and

malfunction due to foaming. These are just some examples of what can go wrong if the fill and drain rates are not maintained.

Fill rates of suspect units should be checked. Open the disconnect to cut off all power in the humidifier before reaching inside. One of the 24VAC wires to each primary voltage contactor holding coil (some models have two contactors per cylinder) should be temporarily disconnected for this test. This way, no boiling occurs during the test so as not to detract from the fill rate. Fill rates should measure nominally at 1" to 1-1/2" of vertical rise in water level in the cylinder in one minute.

If filling too quickly, check for excessively high supply water pressure (over 80 psig). If water pressure is correct, verify fill valve body orifice (consult factory). If filling too slowly, look to probable causes described under Error 3 later in this manual. Check rate with steam line disconnected.

Manual drain rates of suspect units should be checked using Figure #18 as reference times.

	Figure #18
	Manual Drain Times
CYL. SIZE	PROPER TIME (sec) TO DRAIN MANUALLY
(SERIES)	FROM SEAM TO EMPTY
	BEIGE BODY DRAIN VALVE
500/600	2 minutes and 52 seconds ± 10 sec.
400	1 minute and 20 seconds ± 5 sec.
300	43 seconds ± 2 sec.
200	25 seconds ± 1 sec.

If time measurements are longer, repeat with external drain disconnected (and draining into a pail) to know if external drain is impeding flow.

Clogged strainer and/or clogged drain valve will cause shortened cylinder life. But start by determining what caused the strainer and/or drain valve to clog in the first place.

Do not assume that if strainer and/or drain valve are clogged that they are to blame. If the external drain has been impeding flow, then waste accumulates, resulting in a clogged strainer and/or clogged drain which, in turn, results in shortened cylinder life.

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