Cooling Set Point Select; Single; Dual Switch; Dual Ccn Occupied - Carrier AquaSnap 30RAP011-060 Controls, Start-Up, Operation, Service, And Troubleshooting

CONTROL
TYPE
(CTRL)
0 (switch)
2 (Occupancy)
3 (CCN)
*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.
†Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals LVT-10,8.

Cooling Set Point Select

Table 19 lists cooling set point limits.
Table 19 — Cooling Set Point Limits
SET POINT LIMIT
1 = WATER
MINIMUM 40 F (4.4 C)
MAXIMUM

SINGLE

Unit operation is based on Cooling Set Point 1 (Set Points 
COOL  CSP.1).

DUAL SWITCH

Unit operation is based on Cooling Set Point 1 (Set
Points  COOL  CSP.1) when the Dual Set Point switch con-
tacts are open and Cooling Set Point 2 (Set Points  COOL 
CSP.2) when they are closed.

DUAL CCN OCCUPIED

Unit operation is based on Cooling Set Point 1 (Set
Points  COOL  CSP.1) during the Occupied mode and Cool-
ing Set Point 2 (Set Points  COOL  CSP.2) during the Unoc-
cupied mode as configured under the local occupancy schedule
accessible only from CCN. Schedule Number in Table SCHE-
DOVR (See Appendix B) must be configured to 1. If the Schedule
Number is set to 0, the unit will operate in a continuous 24-hr Oc-
cupied mode. Control method must be configured to 0 (switch).
See Table 18.

4 TO 20 MA INPUT

Unit operation is based on an external 4 to 20 mA signal input to
the Energy Management Module (EMM). Refer to page 30.

CONFIGURATION SET POINT LIMITS

Table 20 lists configuration set point limits.
Table 20 — Configuration Set Point Limits
SET POINT LIMIT
1 = WATER
MINIMUM
40°F (4.4°C)
MAXIMUM
Table 18 — Control Methods and Cooling Set Points
OCCUPANCY
STATE
Occupied
Unoccupied
Occupied
Unoccupied
Occupied
Unoccupied
COOLER FLUID TYPE, FLUD
2 = MEDIUM BRINE
14 F (–10.0 C)
70 F (21.1 C)
COOLER FLUID TYPE (FLUD)
2 = BRINE
14°F (–10.0°C)
60°F (15.5°C)
COOLING SET POINT SELECT (CLSP)
0 1
(SINGLE) (DUAL, SWITCH)
ON,CSP1 ON*
ON,CSP1 ON*
ON,CSP1 ON*
OFF OFF
ON,CSP1 ON*
ON,CSP1 ON*

Ice Mode

When Ice Mode is enabled (Configuration  OPT2  ICE.M),
Cooling Setpoint Select (Configuration  SLCT  CLSP) must
be set to Dual Switch or Dual CCN Occupied. The Energy Man-
agement Module (EMM) must be installed. Unit operation is
based on Cooling Setpoint 1 (CSP.1) during the Occupied mode,
Ice Setpoint (CSP.3) during the Unoccupied mode with the Ice
Done contacts open, and Cooling Setpoint 2 (CSP.2) during the
Unoccupied mode with the Ice Done contacts closed. These 3 set
points can be utilized to develop your specific control strategy.

Cooling Set Point (4 to 20 mA)

A field supplied and generated, externally powered 4 to 20 mA
signal input to the Energy Management Module (EMM) can be
used to provide the leaving fluid temperature set point. Connect
the signal to LVT10,8 (+,–). Figure 31 shows how the 4 to 20 mA
signal is linearly calculated on an overall 10°F to 80°F (
26.7°C) range for fluid types (Configuration  OPT1  FLUD)
1 or 2. The set point will be limited by the fluid (FLUD) type. Be
sure that the chilled water loop is protected at the lowest tempera-
ture. See Table 21.
90 (32)
80 (27)
70 (21)
60 (15)
50 (10)
40 (4.4)
30 (-1)
(FLUD=2) MINIMUM
SETPOINT 14F(-10.0C)
20 (-7)
10 (-12)
0 (-17)
0 2
EMM — Energy Management Module
Fig. 31 — Cooling Set Point (4 to 20 mA)
39
2
(DUAL, OCC)
ON,CSP1
ON,CSP2
Illegal
Illegal
ON,CSP1
ON,CSP2
MAXIMUM
SETPOINT
70F(21.1C)
(FLUD=1) MINIMUM
SETPOINT 40F(4.4C)
4 6 8 10 12 14 16
4 to 20 mA Signal to EMM
3
(4 TO 20 MA)
ON†
ON
ON†
OFF
ON†
ON†
12.2 to
–
18 20 22