Operating instructions

43
Switch Controlled (Capacity Based)
— If using 2-step De-
mand Limit control, an Energy Management Module must be
installed. One-step Demand Limit control does not require the
Energy Management Module. To configure Demand Limit for
switch control, three parameters for 1-step switch control must
be configured. For 2-step control, four parameters must be
configured. The parameters are: the type of Demand Limit
Selection (Demand Limit Type Select, DMDC), the setting
for Switch Limit Set Point 1 (Switch Limit Setpoint 1, DLS1),
The setting for Switch Limit Set Point 2 (Switch Limit Set-
point 2, DLS2), and Current Limit Select (Current Limit Se-
lect, CUR.S). Current Limit Select must be set to NO.
To configure this option with the Touch Pilot™ display:
To configure this option with the Navigator™ display:
In the following example, 2-step demand limit based on
capacity is desired with the first switch closure limiting the
capacity to 60%. The second switch closure is to limit the
capacity to 40%. Demand Limit Switch 1 is 60% and Demand
Limit Switch 2 is 40%.
Switch Controlled (Current Based)
— If using 2-step de-
mand limit control, an Energy Management Module must be
installed. One-step demand limit control does not require the
Energy Management Module. Four parameters for 1-step
switch control must be configured. For 2-step control, five
parameters must be configured. The parameters are: the type
of Demand Limit Selection (Demand Limit Type Select,
DMDC), the setting for Switch Limit Set Point 1 (Switch Lim-
it Setpoint 1, DLS1), the setting for Switch Limit Set Point 2
(Switch Limit Setpoint 2, DLS2), the Current Limit Select
(Current Limit Select, CUR.S), and the Compressor Current
limit at 100% signal, (Current Limit at 100%, CUR.F).
To configure this option with the Touch Pilot display:
0
1
2
3
4
5
6
0 10 15 20
mA Signal
Degrees Reset (deg F)
Cooling Reset
Deg. Value
(DGRC)
Current Full
Reset Value
(CRV2)
Current No Reset Value
(CRV1)
5
Fig. 27 — 4 to 20 mA Temperature Reset
a30-4482
DISPLAY NAME PATH
LINE
NO.
VALUE
Demand Limit
Type Select
Config
USER 24
1 (Switch Control)
Default = 0 (None)
Switch Limit
Setpoint 1
Setpoints
SETPOINT 33 Default = 100%
Switch Limit
Setpoint 2
Setpoints
SETPOINT 34
(Not required
for 1-Step)
Default = 100%
Current Limit
Select
Config
USER 30
No
Default = No
ITEM ITEM EXPANSION PATH VALUE
DMDC
Demand Limit
Select
Configuration
RSET
SWITCH
Default = NONE
DLS1
Switch Limit
Setpoint 1
Setpoints
MISC Default = 100%
DLS2
Switch Limit
Setpoint 2
Setpoints
MISC
(Not required
for 1-Step)
Default = 100%
CUR.S
Current Limit
Select
Configuration
OPTN
NO
Default: NO
TOUCH PILOT DISPLAY NAVIGATOR DISPLAY
Display Name Value Item Value
Demand Limit Type Select 1 DMDC SWITCH
Switch Limit Setpoint 1 60% DSL1 60%
Switch Limit Setpoint 2 40% DSL2 40%
Current Limit Select No CUR.S NO
DISPLAY NAME PATH
LINE
NO.
VALUE
Demand Limit
Type Select
Config
USER 24
1 (Switch Control)
Default = 0
(None)
Switch Limit
Setpoint 1
Setpoints
SETPOINT 33 Default = 100%
Switch Limit
Setpoint 2
Setpoints
SETPOINT 34
(Not required
for 1-Step)
Default = 100%
Current Limit
Select
Config
USER 30
Ye s
Default = No
Current Limit
at 100%
Config
USER 31
Default =
2000.0 Amps