Carrier 040-420 - Manual (Page 43)

16
8
6
0
0 2 4 6 8 18 2 0
RESET REFERENCE SIGNAL -20 MA INPUT)
Fig. 7 4-20 Cooling Temperature Reset
Example 7A Using Demand Limit Example Using Demand Limit (4-20
(First Log On as Shown in Table 11) (First Log On As Shown in Table 11)
KEYPAD
ENTRY
DISPLAY
RESPONSE
FLD CFG
ERTYP
LSTYP
L S T Y P 1
DEMAND
100
60
D L S 2 1 0 0
DLS2 40
COMMENTS
Field configuration sub-
function of service function
Scroll past other elements
i n t h e s u b f u n c t i o n
is not enabled
is now enabled
for 2-stage switch control
Demand Limit set points
subfunction of set point
f u n c t i o n
1 currently set
a t 1 0 0 %
reset to 60%
2 currently set
a t 1 0 0 %
2 reset to 40%
To Disable Demand Limit:
KEYPAD
ENTRY
DISPLAY
RESPONSE
COMMENTS
FLD CFG
Field configuration sub-
f u n c t i o n o f s e r v i c e f u n c t i o n
E R T Y P 0
Scroll past other elements
i n t h e s u b f u n c t i o n
L S T Y P 1
L S T Y P 0
is enabled for
2-stage switch control
is now disabled
KEYPAD
ENTRY
q ‘n
DISPLAY
RESPONSE
FLD CFG
E R T Y P 0
LSTYP
L S T Y P 2
DEMAND
D M A X 1 0 0
D M A X 9 0
RMAX 20
R M A X 1 5
0
20
4
6
COMMENTS
F i e l d c o n f i g u r a t i o n s u b f u n c t i o n
of service function
Scroll past other elements in
t h e s u b f u n c t i o n
is not enabled
is now enabled
for 4-20 signal control
D e m a n d L i m i t s e t p o i n t s
Maximum demand limit is 100%
Maximum demand limit is 90%
Maximum demand limit
reference is 20
Maximum demand limit
reference is 15
Minimum demand limit is 0%
Minimum demand limit is 20%
Minimum demand limit
reference is 4
Minimum demand limit
reference is 6
NOTE: Select 3 for Carrier comfort Network (CCN) load limiting
Select 4 for CCN demand limiting.
4 3