Adjusting Heating Staging; Dehumidification; Dehumidification Modes; Figure 23 Adjusting Cooling Stage Differentials - Bard FUSION-TEC WR35BPA Service Instructions Manual

7. Press ENTER key to save value and move cursor to
Stage 1 Off Differential.
8. Press UP or DOWN keys to adjust number of
degrees below setpoint to turn cooling operation
off.
9. Press ENTER key to save value and move cursor to
next stage differential.
10. Repeat steps 6 through 9 for Stage 2 and Stage 3
differentials.
11. Press ESCAPE key several times to return to Main
Menu screen.
FIGURE 23
Adjusting Cooling Stage Differentials

Adjusting Heating Staging

This unit uses staging differentials to control heating
operation. The on differential for a stage references
the number of degrees below the setpoint at which
the stage turns on. The off differential for a stage
references the number of degrees above the setpoint at
which the stage turns off.
To adjust heating stage differentials:
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 Sys
Config; press ENTER key.
4. Press UP or DOWN keys to scroll to Heating Setup
B5.
5. Press ENTER key to scroll to Stage 1 On
Differential (see Figure 24).
6. Press UP or DOWN keys to adjust number of
degrees below setpoint to turn heating operation
on.
7. Press ENTER key to save value and move cursor to
Stage 1 Off Differential.
8. Press UP or DOWN keys to adjust number of
degrees above setpoint to turn heating operation
off.
9. Press ENTER key to save value and move cursor to
next stage differential.
Manual 2100-695C
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10. Repeat steps 6 through 9 for Stage 2 and Stage 3
differentials.
11. Press ESCAPE key several times to return to Main
Menu screen.
FIGURE 24
Adjusting Heating Stage Differentials

Dehumidification

The unit uses a dehumidification sequence (cycling
dehumidification) that does not require the electric
heat to run at the same time as the compressor.
Instead, the unit will turn on the compressor to cool
down to the heating setpoint. Once the lower setpoint
has been reached, the unit will heat the space back
up to the upper setpoint. This cycle continues until
the humidity level in the shelter reaches an acceptable
level. At this point, the unit will revert back to normal
operation. The economizer will also be disabled while
the unit is in the dehumidification mode.

Dehumidification Modes

Dehumidification Off
When the humidity level inside a zone falls to the
Dehumidification Off setpoint, the system will stop
attempting to dehumidify the space. The default
setpoint value for this mode is 60% RH.
Passive Dehumidification
When the humidity level rises to the Passive
Dehumidification setpoint, the controller will activate
staged dehumidification at the available wall units. As
the humidity level rises to the passive dehumidification
setpoint, the free cooling function (economizer)
is disabled. When there is a call for cooling, the
compressor will energize and the blower speed will be
reduced to the unit dehumidification mode or Balanced
Climate speed whichever is applicable to the unit. All
units allowed to run within the zone will be given the
dehumidification command and will operate as such on
a call for cooling. The default setpoint value for passive
dehumidification is 70% RH.
Active Dehumidification
When the humidity level rises to the Active
Dehumidification setpoint, the supervisory controller
will active staged dehumidification at the available wall