Carrier AquaForce 30XV140, Управление, пуск, эксплуатация, обслуживание и инструкции по устранению неисправностей

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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).
Brine or Glycol
Configure the unit Evaporator Fluid Type to Medium Brine or
Low Brine for units with brine or glycol added to the chilled water
loop. The Low Brine option will allow for a set point temperature
range of 14 to 36°F (–10 to 2.2°C).
See chart on page 30 for temperature limits for brine options.
Before making this selection, confirm suitable antifreeze has
been added and is of sufficient concentration to protect the
loop. In addition, the Brine Freeze Setpoint ( Main Menu

Configuration Menu

Service Parameters

Brine Freeze
Setpoint ) must be set for proper freeze protection operation.
Set the Brine Freeze Setpoint to the freeze protection provided
by the antifreeze concentration. This value will be the freeze
point of the fluid.
Evaporator Pump Control
Evaporator pump control is required on all units unless the
chilled water pump runs continuously or the chilled water sys-
tem contains a suitable antifreeze solution. For units supplied
with the pump option, this is set up from the factory. The 30XV
units with Greenspeed
®
Intelligence can be configured for sin-
gle or dual external evaporator pump control with the standard
controls. In addition to the pumps, all wiring including connec-
tions to the pump contactor and a feedback circuit from the
contactor must be field supplied. Table 25 summarizes evapo-
rator pump configuration parameters. Fig. 30 shows the wiring.
PUMP SELECTION
The Evaporator Pump Sequence mode can be reached by fol-
lowing Main Menu

Configuration Menu

Pump Config-
uration . The available settings are:
• 0 = No Pump: The evaporator pump will not be controlled
by the chiller. This is the default setting.
• 1 = One Pump Only, Factory Supplied Pumps: Use for a
single remote pump or for factory supplied pumps. (“1” is
also used for factory supplied pumps.)
• 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 automatically alter-
nate the operation of the pumps to even the wear on the
pumps, based on the hours configured under Pump Auto
Rotation Delay ( Main Menu

Configuration Menu

Pump Configuration

Pump Auto Rotation 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.
Table 25 — Evaporator Pump Configuration
Parameters
Fig. 30 — Wiring for Evaporator Pump Control
Factory supplied pumps should have this configuration set to 1.
There is only one “on” signal to the pumps. The pumps run si-
multaneously. Speed is controlled in the pump software and
communication between the pumps sets the appropriate speed
for each pump.When the Evaporator Pumps Sequence is con-
figured, the evaporator pump output will be energized when
the chiller enters an On state. Proof of flow from the chilled
water flow switch (CWFS) is required for the unit to start me-
chanical cooling. The evaporator pump output is also energized
when certain alarms are generated. The evaporator pump out-
put 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 Protec-
tion alarm is generated, which provides additional freeze pro-
tection 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 the last compressor
is turned off. The pump will be turned on when requested by
the evaporator heater function (see the Evaporator Freeze Pro-
tection section on page 71).
FACTORY-SUPPLIED PUMPS
Pumps supplied by the factory are piped in a parallel arrangement.
These pumps are driven with ECM variable speed motors. All of
the pumps may run simultaneously. Sensorless control based in
the pump motor is used to determine the speed of each pump. The
chiller control treats the pump assembly as a single pump with re-
gard to starting and stopping the pump system. For setup and oper-
ating details, see “Factory-Supplied Pumps” on page 336.
PERIODIC PUMP QUICK START
The control system has the ability to start the pumps periodi-
cally to maintain bearing lubrication and seal integrity. This
function will be used when the unit is stopped for a long time
DISPLAY NAME PATH VALUE
Evaporator
Pumps
Sequence
Main Menu

Configuration Menu

Pump Configuration
0 = No Pump (Default)
1 = One Pump Only ("1"
is also used for factory
supplied pumps.)
2 = Two Pumps Auto
3 = Pump no. 1 Manual
4 = Pump no. 2 Manual
Pump Auto
Rotation Delay Default: 48 hrs.
(Range 24 to 3000 hrs.)
Pump Sticking
Protection
Default: No
Flow Checked
If Pump Off
Default: Yes