Dectron, Inc. March 2012
Owner’s Manual
DSH/DSV/RSH/DBH/RBH Series Dehumidifier
Data subject to change without notice.
297
Alarms Troubleshooting Service
DECTRON
UNITS WITH VOLTAGE MONITOR ONLY
For TYPE 2 monitors, skip to next page.
Type 1 Voltage Monitor
After power wiring is complete, and when safe to do so, turn on the branch-
circuit disconnect switch.
In some cases the blower may start. Some
DRY-O-TRON® units may have voltage monitors that prevent operation in the
event the branch circuit has voltage that is too high, too low, has lost a phase,
or has reversed phase sequence.
If the green LED
is not lit, confirm that the applied voltage is within ±10% of the nameplate volt-
age (NEMA MG-1), that all three phases are present, and that the phase
sequence is correct. Be sure that the knob(s) are set correctly.
The over-voltage setting should be at nominal voltage plus 10%.
The under-voltage setting should be at nominal voltage minus 10%.
Risk of contact with moving parts. Can cause injury or death.
This product contains rotating parts and V-belt drives. Some installation, service, and
maintenance procedures could expose personnel to the risk of injury or death from
contact with these parts.
Using only approved devices (e.g. locking safety switch), disconnect, lockout, and
tagout all sources of electrical energy before working inside the unit cabinet. Allow
adequate time for rotating parts to stop. Follow all applicable safety regulations.
WARNING
Identify the type of voltage monitor present.
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