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• Cooler pump control is enabled and the chilled water
flow switch/interlock is closed for more than 2 minutes
following a command to shut down the pump.
The last alarm criterion can be disabled. If Flow Checked if
Pmp Off (Configuration
OPTN
control will ignore the pump interlock input if the cooler pump
output is OFF.
The ComfortLink™ controls is the ability to periodically
start the pumps to maintain the bearing lubrication and seal in-
tegrity.
If
Periodic
Pump
OPTN
PM.PS) is set to YES, and if the unit is off at 2:00
PM, a pump will be started once each day for 2 seconds. If the
unit has 2 pumps, Pump 1 will be started on even days (such as
day 2, 4, or 6 of the month); Pump 2 will be started on odd
days. The default for this option is PM.PS=NO.
The pump will continue to run for 60 seconds after an off
command is issued.
Machine Control Methods —
how the machine operates. One variable controls the machine
On-Off function. The second controls the set point operation.
The third variable controls the Heat-Cool operation which is
always set to cool. Table 25 illustrates how the control method
and cooling set point select variables direct the operation of the
chiller and the set point to which it controls. Table 25 also
provides the On/Off state of the machine for the given
combinations.
Machine On/Off control is determined by the configuration
of the Operating Type Control (Operating Modes
OPER). Options to control the machine locally via a switch,
on a local Time Schedule, or via a Carrier Comfort Network
command are offered.
SWITCH CONTROL — In this Operating Type Control, the
Enable/Off/Remote Contact switch controls the machine locally.
All models are factory configured with OPER=0 (Switch Con-
trol). With the OPER set to 0, simply switching the Enable/Off/
Remote Contact switch to the Enable or Remote Contact posi-
tion (external contacts closed) will put the chiller in an occupied
state. The unit Occupied Status (Run Status
will change from NO to YES. The Status Unit Control Type
Heat Cool
Control Method
Select
(OPER)
(HC.SE)
0
0
(Switch Ctrl)
(Cool)
1
0
(Time Sched)
(Cool)
2
0
(CCN)
(Cool)
— = No Effect
P.LOC) is set to NO, the
Start
(Configuration
Three variables control
SLCT
®
VIEW
OCC)
Table 25 — Control Methods and Cooling Set Points
PARAMETER
Ice Mode
Setpoint Select
Enable
(SP.SE)
(ICE.M)
—
1
(Setpoint1)
Enable
—
2
(Setpoint2)
Enable
3
—
(4-20mA Setp)
—
Enable
—
4
(Dual Setp Sw)
Enabled
—
0
(Setpoint Occ)
Enable
—
—
Enable
(Run Status
VIEW
when the switch is Off to 1 (Local On) when in the Enable posi-
tion or Remote Contact position with external contacts closed.
TIME SCHEDULE — In this Operating Type Control, the
machine operates under a local schedule programmed by the
user 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 Type Control, Operating
Modes
SLCT must be set to OPER=1. Two Internal Time
Schedules are available. Time Schedule 1 (Time Clock
SCH1) is used for single set point On-Off control. Time Sched-
ule 2 (Time Clock
SCH2) is used for dual set point On-Off
and Occupied-Unoccupied set point control. The control will
use the operating schedules as defined under the Time Clock
mode in the scrolling marquee display.
CCN Global Time Schedule — A CCN Global Schedule can
be utilized. The schedule number can be set anywhere from 65
to 99 for operation under a CCN global schedule. The 30RB
chillers can be configured to follow a CCN Global Time
Schedule broadcast by another system element. The Comfort-
VIEW™ Network Manager's Configure and Modify com-
mands or the Service Tool's Modify/Names function must be
used to change the number of the Occupancy Equipment Part
Table Name (OCC1P01E) to the Global Schedule Number.
The Schedule Number can be set from 65 to 99 (OCC1P65E).
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). When OCC1PxxS is set to a value great-
er 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 Remote Contact position with the contacts
closed for the unit to operate. The Status Unit Control Type
(Run Status
VIEW
switch is Off. The Status Unit Control Type will be 2 (CCN)
when the Enable/Off/Remote Contact switch input is On.
Ice Done
Dual Setpoint
(ICE.D)
Switch (DUAL)
—
—
Open
Closed
—
—
Open
Closed
—
—
Open
Open
Closed
Closed
Closed
Open
—
Closed
Open
Closed
Closed
Closed
—
—
Open
—
Closed
—
—
—
—
Open
—
32
CTRL) will change from 0 (Local Off)
STAT) will be 0 (Local Off) when the
Setpoint
Occupied (SP.OC)
—
—
—
—
—
4-20 mA
—
—
—
—
—
—
—
Occupied
Unoccupied
Unoccupied
Occupied
Unoccupied
Unoccupied
ACTIVE
SET
POINT
CSP.1
CSP.3
CSP.2
CSP.3
CSP.1
CSP.3
CSP.2
CSP.1
CSP.2
CSP.3
CSP.2
CSP.1
CSP.2
CSP.3
CSP.2
CSP.1
CSP.2
CSP.3
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