Manual 2100-695C
Page
23 of 56
Adjustment of dirty filter switch may be necessary to
ensure proper operation. See Table 9 and Figure 36 on
page 24 to aid in setting the filter switch to operate at
different percentages of filter blockage.
Dirty Filter Alarm
The wall-mount unit is equipped with a differential
pressure switch input to the controller (see Figure 32).
When the switch indicates a dirty filter, the controller
will generate an alarm. Once the condition is no longer
present, the alarm will automatically clear. Additionally,
an indicator light will be turned on with the alarm and
turned off when the alarm clears (see Figure 36 on
page 24).
Disabling the dirty filter switch in
I/O Config
disables
this alarm.
The threshold of this alarm is adjusted by changing the
settings on the switch (see Table 9).
Filter Indicator Light
These units are equipped with a 24v indicator light
mounted on side of unit that displays the current status
of the filter (see Figure 36 on page 24). When the light is
on, the filter needs to be replaced. Once the filter(s) has
been changed, the indicator light will turn off.
Indoor Airflow Operation
High Sensible Mode
High sensible mode allows for higher airflow through
the indoor air section. In this mode, air circulation is
increased through the cooled space, but less moisture
is removed from the air circulating through the unit.
NOTE:
High sensible enable on the wall-mount unit
will only toggle high sensible mode during
orphan mode operation. When connected to the
LC6000 controller, the high sensible mode will
be overridden by the controller operation.
To change these settings:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
TECHNICIAN password 1313.
3. Press UP or DOWN keys to scroll to
Adv System
Config
; press ENTER key.
4. Press UP or DOWN keys to scroll to
Blower CFM
Mode B6
.
5. Press ENTER key to scroll to
High Sensible
(see
Figure 35).
All units tested equipped with MERV 8 filters. Appropriate supply (SG) and return (RG) grilles installed during testing.
Pressure switch adjustment may be necessary due to variations in filter type, installation and room pressure.
Bard recommends filter switch be set at 50% filter blockage or less. Higher settings may significantly hinder unit performance.
TABLE 9
Filter Switch Pressure Settings
Unit
Filter Blockage %
0%
10%
20%
30%
40%
50%
60%
70%
WR35BP*
(Default) High S/T
Switch Static Setting
0.65
0.70
0.75
0.85
0.95
1.05
1.25
1.50
Evaporator Airflow %
100%
99.0% 97.0% 96.4% 95.5% 92.7% 88.1% 80.6%
WR35BP*
Standard
Switch Static Setting
0.40
0.43
0.45
0.50
0.55
0.65
0.75
0.90
Evaporator Airflow %
100%
99.7% 98.7% 96.8% 96.0% 94.4% 91.6% 85.2%
WR36BP*
(Default) High S/T
Switch Static Setting
0.12
0.12
0.12
0.20
0.20
0.35
0.35
0.40
Evaporator Airflow %
100%
99.3% 99.4% 98.7% 96.5% 92.1% 91.3% 87.9%
WR36BP*
Standard Airflow
Switch Static Setting
0.12
0.12
0.12
0.12
0.20
0.20
0.20
0.30
Evaporator Airflow %
100%
99.3% 99.4% 98.8% 97.3% 91.5% 89.8% 88.3%
WR58BP*
(Default) High S/T
Switch Static Setting
0.40
0.50
0.60
0.70
0.75
0.80
0.90
1.00
Evaporator Airflow %
100%
98.7% 98.1% 97.5% 91.7% 81.3% 79.1% 78.6%
WR58BP*
Standard Airflow
Switch Static Setting
0.30
0.35
0.40
0.45
0.50
0.65
0.70
0.90
Evaporator Airflow %
100%
99.8%
99%
98.5% 96.8% 89.9%
84%
82.2%
FIGURE 35
Enabling High Sensible Mode
