Circulating Water Pump (Only H Version); Water Flow Setting; Anti-Seizing Pump - Carrier 30AWH004HB Service Manual

3.3.6 Circulating water Pump (only H version)

Water flow setting

Speed selector
Shaft protection plug
Pumps have a manual speed selector (3 speed settings) which allow for
adjustment of speed to match the requirements of the system.

Anti-seizing pump

The 30AWH__H units are equipped with protection against the seizing
of the pump motor shaft. To allow this function, do not empty the
system or disconnect the power during long periods of inactivity.
In any case, if the pump rotor shaft seizes after a long period of
inactivity, the user must do the following to unblock it:
3.3.7 External water pump selection (X and NX version)
Pump has to be selected in order to provide nominal water flow at
expected water loop pressure loss.
Centrifugal Pump Curves.
Water loop pressure loss estimation at nominal water flow is needed to
define water pump size.
SM_30AW.indd 17
Pump Speed Setting procedure:
The best speed setting will provide adequate circulation and provide
1. Set the speed selector to minimum (one)
2. Open all thermostatic or manual radiator valves to maximum
3. Set any room thermostatic controls to maximum
4. Start up system and pump should start
5.
(leaving water temperature-entering water temperature)
6.
temperature is more than 6°C select a higher pump speed An
unit water IN-OUT pipes and select pump speed to match the unit
nominal water flow (see unit available static pressure curves).
- Disconnect the power
- Remove the front panel
- Unscrew the shaft-protection plug on the back of the pump
- Insert a screwdriver in the slot and turn the rotor shaft
- Remount the protection plug
- Reconnect the power
Pump Speed Setting procedure is the same used for 30AWH---H version.
after external water pump and select pump speed to match the unit
nominal water flow (see water pump curves)
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Installation
30AW
14-03-2011 14:41:26