Cooling Set Point Select; Cooling Set Point (4 To 20 Ma); Low Sound Mode Operation; Heating Operation - Carrier AQUASNAP 30RAP010-150 Start Up & Operation Manual

Cooling Set Point Select

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
Point switch contacts 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
Occupied mode and Cooling
 
Points COOL CSP.2) during the Unoccupied mode as
configured under the local occupancy schedule accessible only
from CCN. Schedule Number in Table SCHEDOVR (See Ap-
pendix B) must be configured to 1. If the Schedule Number is
set to 0, the unit will operate in a continuous 24-hr Occupied
mode. Control method must be configured to 0 (switch). See
Table 10.
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 26.
Cooling Set Point (4 to 20 mA) —
and generated, externally powered 4 to 20 mA signal can be
used to provide the leaving fluid temperature set point. Connect
the signal to LVT7,8 (+,–). Figure 22 shows how the 4 to 20
mA signal is linearly calculated on an overall 10 F to 80 F
range for fluid types (Configuration
2. The set point will be limited by the fluid (FLUD) type. Be
sure that the chilled water loop is protected at the lowest
temperature.
100 (38)
90 (32)
80 (27)
70 (21)
60 (15)
50 (10)
40 (4.4)
30 (-1)
20 (-7)
(FLUD = 2) MINIMUM
10 (-12)
SETPOINT 14F (-10C)
0 (-17)
0 2 4 6
4 to 20 mA Signal to EMM
EMM — Energy Management Module
Fig. 22 — Cooling Set Point (4 to 20 mA)
Low Sound Mode Operation —
tory configured with the Low Sound Mode disabled. In the
Configuration mode under sub-mode OPT2, items for Low
Sound Mode Select (Configuration
Sound Start Time (Configuration
Sound End Time (Configuration
Sound Capacity Limit (Configuration
factory configured so that the chiller always runs as quietly as
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.

CSP.1) when the Dual Set
 
COOL CSP.1) during the
Set Point 2
A field supplied
 
OPT1 FLUD) 1 or
MAXIMUM
SETPOINT
70F (21.1C)
(FLUD = 1) MINIMUM
SETPOINT 38F (3.3C)
10 12 16 18 20
8 14
a30-5524
All models are fac-
 
OPT2 LS.MD), Low
 
OPT2 LS.ST), Low
 
OPT2 LS.ND) and Low
 
OPT2 LS.LT) are
Table 10 — Control Methods and Cooling Set Points
OCCUPANCY
STATE
Occupied
Unoccupied
Occupied
Unoccupied
Occupied
Unoccupied
possible. This results in operation at increased saturated con-
densing temperature. As a result, some models may not be able
to achieve rated efficiency. For chiller operation at rated effi-
ciency, disable the low sound mode or adjust the low sound
mode start and stop times accordingly or set both times to
00:00 for rated efficiency operation 24 hours per day. In addi-
tion, the low sound capacity limit can be used to reduce overall
chiller capacity, if required, by limiting the maximum to a user-
configured percentage.
Heating Operation —
(Set
outputs or optional factory-installed hydronic system operation
can be utilized for heating applications. The heating mode is
activated when the control sees a field-supplied closed switch
input to terminal block LVT-19,20. The control locks out cool-
ing when the heat relay input is seen. A field-supplied boiler re-
lay connection is made using heat relay and alarm relay con-
tacts. Factory-installed 'BOILER' connections exist in the con-
trol panel near LVT for these applications. Alarms and alerts
A189 through A202 are active during heating operation.
Service Test —
power must be on.
The Service Test function should be used to verify proper
operation of condenser fan(s), compressors, minimum load
valve solenoid (if installed), cooler pump(s), EXVs, and re-
mote alarm relay. To use the Service Test mode, the Enable/
Off/Remote Contact switch must be in the OFF position. Use
the the Service Test Mode and Sub-Mode Directory table in
Appendix A to enter the mode and display TEST. Press
twice so that OFF flashes. Enter the password if re-
ENTER
quired. Use either arrow key to change the TEST value to the
ON position and press
button to enter the OUTS or COMP sub-mode.
Test the condenser fans, cooler pump(s) and alarm relay by
changing the item values from OFF to ON. These discrete
outputs are then turned off if there is no keypad activity for
10 minutes. Use the arrow keys to select the desired percentage
when testing expansion valves and Motormaster
When testing compressors, lead compressor must be started
first. All compressor outputs can be turned on, but the control
will limit the rate by staging one compressor per minute. Com-
pressor unloaders and hot gas bypass relays/solenoids (if in-
stalled) can be tested with the compressors on or off. The relays
under the COMP mode will stay on for 10 minutes if there is
no keypad activity. Compressors will stay on until they are
turned off by the operator. The Service Test mode will remain
enabled for as long as there is one or more compressors run-
ning. All safeties are monitored during this test and will turn a
compressor, circuit or the machine off if required. Any other
mode or sub-mode can be accessed, viewed, or changed during
the TEST mode. The MODE item (Run Status
display "0" as long as the Service mode is enabled. The TEST
sub-mode value must be changed back to OFF before the chill-
er can be switched to Enable or Remote contact for normal
operation.
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*
32
The chiller can be used for pump
Both main power and control circuit
. Press
ENTER ESCAPE
® V controller.

2
(dual, occ) (4 to 20 mA)
ON,CSP1 ON†
ON,CSP2 ON
Illegal ON†
Illegal OFF
ON,CSP1 ON†
ON,CSP2 ON†
and the
VIEW) will
3