Fluid Set Point Control Location; Cooling Set Point Selection; Set Point Occupancy - Carrier AQUAFORCE 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

The Occupancy Supervisory Part table name (OCC1P01S)
number must be changed to configure the unit to broadcast a
Global Time Schedule. The Schedule Number can be set from
65 to 99 (OCC1P65S to OCC1P99S). When OCC1PxxS is set
to a value greater than 64, an occupancy flag is broadcast over
the CCN every time it transitions from occupied to unoccupied
or vice-versa. By configuring their appropriate Time Schedule
decisions to the same number, other devices on the network can
follow this same schedule. The Enable/Off/Remote Contact
must be in the Enable position or the Remote Contact position
with the contacts closed for the unit to operate. The Unit Run
Status (STAT) will indicate the current status of the machine
(OFF, RUNNING, STOPPING or DELAY), depending on the
schedule. The unit Occupied status (OCC) will indicate the
current occupied schedule according to the schedule, either NO
or YES. The Status Unit Control Type (CTRL) will be LOCAL
OFF when the switch is Off. The Status Unit Control Type will
be CCN when the Enable/Off/Remote Contact switch input is
On.
CCN Control — With CCN Operating Type control, the ma-
chine operates under CCN control as long as the Enable/Off/
Remote Contact Switch is in the Enable or Remote Contact
position (external contacts closed.) To operate under this
Operating Control, OPER must be set to CCN CONTROL. An
external CCN device, such as Chillervisor, controls the On/Off
state of the machine. When controlled by a Chillervisor, it is
recommended that the Auto Start When SM Lost (AU.SM) be
set to Yes.
Careful evaluation of Chilled Water Plant control should be
reviewed. In the event Local Control is established, be sure that
all pumps, valves, and other devices are capable of operating
properly. In the event of a loss of communication with the net-
work, the machine will start and be controlled locally. The
CCN device forces the variable CHIL_S_S to control the chill-
er. The Unit Run Status (STAT) will indicate the current status
of the machine (OFF, RUNNING, STOPPING or DELAY),
depending on the CCN command. The unit Occupied status
(OCC) will indicate the current occupied state according to the
CCN command and will be displayed as either NO or YES.
The Status Unit Control Type (CTRL) will be LOCAL OFF
when the Enable/Off/Remote Contact switch is Off. The Status
Unit Control Type will be CCN when the Enable/Off/Remote
Contact switch input is Closed and the CHIL_S_S variable is
Stop or Start.
For Dual Chiller Control applications, the Slave Chiller
must be enabled using the CCN CONTROL option.
ITEM ITEM EXPANSION
Operating Control Operating
OPER
Type Modes
AU.SM Auto Start when
Configuration
SM Lost
Fluid Set Point Control Location —
default for the chilled water fluid set point is controlling to the
leaving water temperature. An option to configure the machine
for entering water control is available. The control operation
remains the same except the control point is focused on the
entering water temperature, rather than the leaving water tem-
perature when configured.
To configure this option for the Touch Pilot™ display:
DISPLAY NAME PATH
Entering Fluid Service\
Control SERVICE1
PATH VALUE
CCN
 
SLCT OPER CONTROL

SERV YES
The factory
LINE
VALUE
NO.
No = Leaving Water Control
5
Yes = Entering Water Control
To configure this option for the Navigator™ display:
ITEM ITEM EXPANSION
EWTO Entering Water
Control
Cooling Set Point Selection —
controlling the Leaving Chilled Water Set Point are offered and
are configured by the Cooling Set Point Select (Setpoint Se-
lect, SP.SE) variable. In addition to the Cooling Set Point Se-
lect, Ice Mode Enable discussed later in this book, and Heat
Cool Select (Heat/Cool Select, HC.SE) variables also have a
role in determining the set point of the machine. All units are
shipped from the factory with the Heat Cool Select set to 0.
All default set points are based on Leaving Water Control
(Entering Fluid Control, EWTO) set to No. Values must be
confirmed for the individual set points. Limits for the set points
are listed in the configurations noted below.
To configure these options for the Touch Pilot display, see
Table 24A. To configure these options for the Navigator dis-
play, see Table 24B.
Table 24A — Cooling Set Point Selection
with Touch Pilot Display
DISPLAY NAME
Cooling Setpoint 1
Cooling Setpoint 2
Cooling Ice Setpoint
Table 24B — Cooling Set Point Selection
with Navigator Display
ITEM ITEM EXPANSION
CSP.1 Cooling Setpoint 1 Setpoints
CSP.2 Cooling Setpoint 2 Setpoints
CSP.3 Ice Setpoint
In all cases, there are limits on what values are allowed for
each set point. These values depend on the Cooler Fluid Type
and the Brine Freeze Set point, discussed later. See Table 25.
Table 25 — Configuration Set Point Limits
SET POINT LIMITS
Minimum *
Maximum
*The minimum set point for Medium Temperature Brine applications
is related to the Brine Freeze Point. The set point is limited to be no
less than the Brine Freeze Point +5° F (2.8° C).
The Setpoint Select configuration can be set to five different
control options: Set Point Occupancy, Set Point 1, Set Point 2,
4-20 mA Input, and Dual Switch.
SET POINT OCCUPANCY — Set Point Occupancy is the
default configuration for the Setpoint Select variable. When
Setpoint Select (Setpoint Select, SP.SE) is configured to 0
(Setpoint Occ), the unit's active set point is based on Cooling
27
PATH VALUE

Configuration SERV No = Leaving
Water Control
Yes = Entering
Water Control
Several options for
LINE
PATH VALUE
NO.
Setpoint 2 Range: 14 to 70 F
(–10.0 to 21.1 C)
Default: 44 F (6.6 C)
Setpoint 3 Range: 14 to 70 F
(–10.0 to 21.1 C)
Default: 44 F (6.6 C)
Setpoint 4 Range: -20 to 32 F
(–28.9 to 0 C)
Default: 44 F (6.6 C)
PATH VALUE
Range: 14 to 70 F

COOL (–10.0 to 21.1 C)
Default: 44 F (6.6 C)
Range: 14 to 70 F

COOL (–10.0 to 21.1 C)
Default: 44 F (6.6 C)
Range: -20 to 32 F

Setpoints COOL (–28.9 to 0 C)
Default: 44 F (6.6 C)
COOLER FLUID TYPE
(COOLER FLUID TYPE, FLUD)
1, Water 2, Brine
38 F (3.3 C) 14 F (–10.0 C)
60 F (15.5 C)