Carrier TOUCHPILOT 30KAV, Manual

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8.2 - Pumps control
The Touch Pilot control can manage one or two water
exchanger pumps, i.e. either two internal variable speed
pumps or up to two customer pumps. Both pumps cannot
run together. The pump is turned on when this option is
configured and when the unit is running.
The pump is turned off when the unit is shut down due to an
alarm, unless the fault is a freeze protection error. The pump
can be started in particular operating conditions when the
water exchanger heater is active. If the pump has failed and
another pump is available, the unit is stopped and started
again with the second pump. If there is no pump available,
the unit shuts down.
Configuration options may differ depending on the number
of pumps available. The status of the pump can be checked
via the Main menu (PUMPSTAT – Pump Status).
8.2.1 - Pumps configuration
Basic pump configuration can be performed via the
Configuration menu (PUMPCONF – Pump Configuration).
Only logged-in users can access the menu. To modify any
pump settings, the unit must be stopped. For units with two
pumps, these pumps can be controlled automatically or each
pump can be started manually.
NOTE: Units are also fitted with the flow switch allowing
for the water flow control (see section 3.7).
Internal pumps configuration
30KAV units can be fitted with two internal variable speed
pumps controlled by the LEN drive.
To set internal cooler pumps
1. Navigate to the Configuration menu.
2. Select Pump Configuration (PUMPCONF).
3. Set C ooler Pumps Sequence [cpumpseq].
Cooler Pumps Sequence [cpumpseq] *
0 = No Pump 3 = Pump#1 Manual
1 = One Pump Only * 4 = Pump#2 Manual
2 = Two Pumps Auto
*It is not possible to set only one variable speed pump control.
Customer pumps configuration
30KAV units can be fitted with up to two customer fixed
speed pumps or one customer variable speed pump (0-10V).
For units without internal pumps, customer pumps may be
configured as follows:
Pump available Cooler Pumps Sequence
No pump 0
One single speed pump 1
One variable speed pump (0-10V) 1 (option 299)
Two single speed pumps 2 = automatic control of two pumps
3 = pump 1 is selected
4 = pump 2 is selected
To set the customer cooler pump(s)
1. Navigate to the Configuration menu.
2. Select
Pump Configuration
(PUMPCONF).
3. Set
Cooler Pumps Sequence
[cpumpseq].
Cooler Pumps Sequence [cpumpseq] *
0 = No Pump 3 = Pump#1 Manual
1 = One Pump Only 4 = Pump#2 Manual
2 = Two Pumps Auto
*Values between 2 and 4 can be selected only in case of dual pumps control.
8.2.2 - Automatic pump selection
If two pumps are controlled and the automatic pump control
has been selected (Cooler Pumps Sequence, PUMPCONF
– Pump Configuration), the control determines which pump
should be started. The control tries to limit the pump run
time to the configured pump changeover delay (Pump Auto
Rotation Delay, PUMPCONF – Pump Configuration). If this
delay has elapsed, then pump changeover is activated.
To set pump automatic rotation delay
1. Navigate to the Configuration menu.
2. Select Pump Configuration (PUMPCONF).
3. Set Pump Auto Rotation Delay [pump_del].
Pump Auto Rotation Delay [pump_del]
24 to 3000 h 48 h
8.2.3 - Pump protection (pump anti-stick function)
The control provides the option to automatically start the
pump each day at 14:00 for 2 seconds when the unit is off
(pump anti-sticking).
The heater for the heat exchanger and the water pump
(for units with a pump) can be energised so that it protects
the heat exchanger or the water pump against any damage
when the unit is shut down for a long time at low outdoor
temperature.
If the unit is fitted with two pumps, the first pump is started
on even days and the second pump is started on odd days.
Starting the pump periodically for a few seconds extends the
lifetime of the pump bearings and the tightness of the pump
seal.
To set periodical pump quick start
1. Navigate to the Configuration menu.
2. Select Pump Configuration (PUMPCONF).
3. Set Pump Sticking Protection [pump_per] to “yes”.
Pump Sticking Protection [pump_per]
no/yes yes