Chilled Water Fluid Type Selection; Evaporator Pump Control; Pump Selection - Carrier AquaForce 30XV140 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

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 (Main Menu  General Parameters 
Run Status) will indicate the current status of the machine de-
pending on the schedule. The unit Occupied status (Main
Menu  General Parameters  Setpoint Occupied) will indi-
cate the current occupied schedule according to the schedule,
either NO or YES.
The Status Unit Control Type (Main Menu  General Pa-
rameters) will be 0 when the switch is Off. The Status Unit
Control Type will be 2 when the Enable/Off/Remote Contact
switch input is On.
CCN Control — To operate under this control, Network must
be selected under the Select Machine Mode accessed by press-
ing the Start/Stop button (see the Operating Type Selection sec-
tion on page 21).
An external CCN device such as Chillervisor controls the
On/Off state of the machine. Careful evaluation of Chilled Wa-
ter Plant control is necessary. In the event Local Control is es-
tablished, be sure that all pumps, valves, and other devices are
capable of operating properly. In the event of a loss of commu-
nication with the network, the machine will start and be con-
trolled locally. The CCN device forces the variable CHIL_S_S
to control the chiller. The Unit Run Status (Main Menu 
General Parameters  Run Status) will indicate the current
status of the machine (OFF, RUNNING, STOPPING or DE-
LAY), depending on the CCN command. The unit Occupied
status (Main Menu  General Parameters) 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_typ) will be LOCAL OFF when the Start/Stop but-
ton 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.
CHILLED WATER FLUID TYPE SELECTION — The
chilled water fluid type must be configured to obtain the proper
leaving water set point control range and freeze protection. The
Evaporator Fluid Type (flui_typ) (Main Menu  Configura-
tion Menu  Service Parameters  Evaporator Fluid Type)
can be set to water or brine.
To configure this option:
DISPLAY
PATH
NAME
Main Menu 
Evaporator
Configuration Menu 
Fluid
Type Service Parameters
Fresh Water — Configure the unit Evaporator Fluid Type to
Water for units without brine or glycol installed in the chilled
water loop. The factory default fluid type is fresh water. This
option will allow for a water temperature set point range of 38
to 60 F (3.3 to 15.5 C). With water as the selection, the freeze
point is fixed at 34 F (1.1 C).
Evaporator Pump Control —
trol is required on all units unless the chilled water pump runs
continuously or the chilled water system contains a suitable
antifreeze solution. The 30XV units with Greenspeed
ligence can be configured for single or dual external evapora-
tor pump control with the standard controls. In addition to the
pumps, all wiring including connections to the pump contac-
tor and a feedback circuit from the contactor must be field
SETPOINT
VALUE
RANGE
1 = Water 38 to 60 F
(3.3 to 15.5 C)
2 = Medium N/A
brine
3 = Low brine N/A
Evaporator pump con-
intel-
®
supplied. Table 23 summarizes evaporator pump configura-
tion parameters. Fig. 23 shows the wiring.
Table 23 — Evaporator Pump Configuration
DISPLAY NAME
Evaporator
Pumps
Sequence
Main Menu
Pump Auto
Configuration Menu
Rotation Delay
Pump Configuration
Pump Sticking
Protection
Flow Checked
If Pump Off
Fig. 23 — Wiring for Evaporator Pump Control
PUMP SELECTION — The Evaporator Pump Sequence
mode can be reached by following Main Menu  Configura-
tion Menu  Pump Configuration. The available settings are:
• 0 = No Pump: The evaporator pump will not be con-
trolled by the chiller. This is the default setting.
• 1 = One Pump Only: If only one pump is selected it will
be the active pump.
• 2 = Two Pump Auto: When two pumps are selected in
auto mode, only one pump will be allowed to run at a
time and the control will determine the On/Off state of
each pump. The control will start the pumps and auto-
matically alternate the operation of the pumps to even the
wear on the pumps, based on the hours configured under
Pump Auto Rotation Delay (Main Menu  Configura-
tion Menu  Pump Configuration  Pump Auto Rota-
tion Delay). If the difference between the operating hours
of the two pumps exceeds the Pump Auto Rotation Delay
the lead pump will change. If a flow failure is detected,
the other pump will attempt to start.
• 3 = Pump #1 Manual: Pump #1 will be the active pump.
• 4 = Pump #2 Manual: Pump #2 will be the active pump.
When the Evaporator Pumps Sequence is configured, the
evaporator pump output will be energized when the chiller en-
ters an On state. Proof of flow from the chilled water flow
switch (CWFS) is required for the unit to start mechanical
cooling. The evaporator pump output is also energized when
certain alarms are generated. The evaporator pump output
should be used as an override to the external pump control if
evaporator pump control is not utilized. The evaporator pump
output is energized if a 10001 Evaporator Freeze Protection
alarm is generated, which provides additional freeze protection
if the system is not protected with a suitable antifreeze solution.
If the Master/Slave function is not active for the chiller
or if the Master/Slave function is active and the unit is the
lead, the pump will be turned on when the unit is in On,
Stopping or Delay state. In addition, when the unit is turned
off the pump will continue operating for 20 seconds after
25
Parameters
PATH VALUE
0 = No Pump (Default)
1 = One Pump Only
2 = Two Pumps Auto
3 = Pump #1 Manual
4 = Pump #2 Manual
Default: 48 hrs.
(Range 24 to 3000 hrs.)
Default: No
Default: Yes