DEZ
S
ERIES
1000
I
NSTALLATION
,
O
PERATION AND
M
AINTENANCE
M
ANUAL
13
R
R
HIGH REACTIVATION TEMPERATURE
FAULT
This illuminates red (and the reactivation heater shuts
down) when the reactivation air temperature entering
the rotor or the air temperature leaving the rotor is
above the high temperature limit. A manual reset of
the temperature limit switches is necessary. Refer to
section 6.0, Troubleshooting
.
ROTOR ROTATION FAULT
This illuminates red if the rotor has not made a
complete revolution within a specified period of time.
3.6 Monitoring Unit Performance
There are two differential pressure gauges on this
system which indicate the pressure drops across the
rotor (see Figure 7). Rotor pressure drop (static
pressure) correlates directly to airflow. In order to
maintain optimum performance, process and
reactivation airflows are set using the rotor pressure
drops. Refer to the Unit Nameplate for the appropriate
settings for the Rotor Pressure Drops (inches w.c.).
The Unit Nameplate indicates the pressure drops
across the rotor as set by the factory. After all
ductwork is installed during initial installation, the
airflows may need to be adjusted to re-establish rotor
pressure drops to the values indicated on the unit test
performance report.
Figure 7 - Differential Pressure Gauges
Set the airflows by adjusting the dampers while the
unit is still cold. The process air damper is generally
located in the process air outlet. The reactivation air
damper is located internally at the reactivation air
outlet.
Afterward, if the gauges show readings that are
significantly lower than the initial factory settings, the
filters may need to be replaced.
!
CAUTION
Do not operate the unit without
filters. It is better to operate the unit with dirty filters
than no filters. Operating the unit without filters may
void the warranty.
