Carrier AQUASNAP 30RB060-390 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 38

To use Space Temperature Reset in addition to the energy
management module, four variables must be configured. They
are: Cooling Reset Type (Configuration
Space T No Reset Temp (Setpoints
T Full Reset Temp (Setpoints

Cool Reset (Setpoints COOL
space temperature reset example, 0° F (0° C) chilled water set
point reset at 72.0 F (22.2 C) space temperature and 6.0° F
(3.3° C) reset at 68.0 F (20.0 C) space temperature. See Fig. 22
and Table 29.
To use 4-20 mA Temperature Reset in addition to the ener-
gy management module, four variables must be configured.
They are: Cooling Reset Type (Configuration

CRST), Current No Reset Val (Setpoints
Current Full Reset Val (Setpoints
Degrees Cool Reset (Setpoints
7
(EXAMPLE)
6
5
4
3
2
1
0
62
60
6
5
4
3
2
1
0
0 2
 
RSET CRST),
 
COOL CRS1), Space
 
COOL CRS2) and Degrees

DGRC). In the following

RSET
 
COOL CRV1),
 
COOL CRV2) and
 
COOL DGRC). In the
64 66 68
SPACE TEMPERATURE (F)
Fig. 22 — Space Temperature Reset
4 6
Fig. 23 — 4 to 20 mA Temperature Reset
following example, at 4 mA no reset takes place. At 20 mA,
5° F (2.8° C) chilled water set point reset is required. See
Fig. 23 and Table 30.
Care should be taken when interfacing with other control
systems due to possible power supply differences such as a
full wave bridge versus a half wave rectification. Connec-
tion of control devices with different power supplies may
result in permanent damage. ComfortLink™ controls
incorporate power supplies with half wave rectification. A
signal isolation device should be utilized if the signal
generator incorporates a full wave bridge rectifier.
70
72
8 10 12
mA SIGNAL
38
CAUTION
74 76 78
14 16 18
80
20