2 Control Functions
Control functions on the module
SMGB0120 rev.0 - 11/2017
21
2
2.1.9 Forced load up capacity control from external signal
It is possible to force load up according to usage purpose.
a.
Contents of activation
It is possible to force load up from the orders of local control panel.
b.
Time chart
Capacity
control
External
signal X
D
Forced load
up
Normal
operation
Normal
operation
Forced load up
ON
OFF
Normal
c.
Wiring method
2 0V
3
SW5
150
151
152
153
154
SW5
Control board of the chiller unit
Forced load
up switch
Power
source of
the local
control
board
?
N O T E
• Thermo OFF judgement, protection devices and protection control from the setting temperature of the main unit are always enabled,
and this control gives them priority.
• When using the function to control the number of units (however excluding the connection to group controller),arrange the wiring to
unit number 1 (master unit). This function becomes enabled in all the units when inputting the signal to unit number 1.
• In case of connection to a group controller, the valid orders are those sent from the group controller. Signal input to the main unit of
the chiller unit is invalid.