Bard MC5300 User Manual

FIGURE 7
Synchronized Dehumidication
Four units were
selected in setup for
Synchronized Dehum
HEAT
1
HEAT
3
5
6
SYNCHRONIZED DEHUM utilizes a pair of units. Unit 1 (of pair) will run in heat and Unit 2 (of pair) will run in cooling.
All dehum units MUST BE placed at the lowest number (1). Lead unit for dehum is always unit number 1 regardless of
rotation lead location.
NOTE: Synchronized Dehum in pairs only, Mechanical Dehum 1 thru 6.
Manual 2100-746D
Page 25 of 59
Synchronized Sequence (see Figure 7)
The controller will use 50% of the congured units
for heating and 50% of the congured units for
cooling for Synchronized Dehumidication. This
option will not be available unless there are at least
two congured units with electric heat capability.
Dehumidication will be limited to 2, 4, or 6 units.
These options will be selectable in the Equipment
Setup pages once Synchronized has been selected.
The controller will energize W1 + W2 on the units
allocated for heating and Y1 + Y2 on the units
allocated for cooling if dehumidication demand is
present. Unit allocation will begin with heating in the
lead unit and cooling in the rst lag unit and continue
alternating until all available units are active. Stages
will increase according to the set point plus the inter-
stage differential. Synchronized Dehumidication will
only activate an even number of units (2, 4, or 6). If
congured to do so, the Aux. Out terminal will change
state.
If any congured unit is actively heating or cooling,
dehumidication will be unavailable until heating/
cooling demand is satised.
Humidication Operation
The controller will use the H terminal for control of
the humidication if congured. If congured for
humidication, H will energize when humidication is
required and de-energize once satised.
Staging
Staging in the MC5000 series controller can be
congured by the user in an alternating or non-
alternating format. In addition, heating or cooling
staging will consider space temperature, heating/
cooling set point and interstage differentials.
Humidication and dehumidication staging
will consider space humidity, humidication/
dehumidication set point and interstage differentials.
Staging Sequence
• Heating, cooling, dehumidication and
humidication will all use the same staging
structure in either a direct acting or reverse acting
manner.
• All staging will utilize a set point, interstage
differential, off differential, staging delay and
minimum on time.
Set Point: The starting point for each operation.
Interstage Differential: The temperature distance
between each stage.
Off Differential: This is how much a particular stage
needs to decrease from the on point before the stage
will turn off.
COOLING
2
COOLING
4

Bard MC5300 Specifications

General

Brand	Bard
Model	MC5300
Category	Controller
Language	English