Carrier AQUASNAP 30RBP Series - Units with Hydraulic Module and Fixed Speed Pump

36
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General
See the paragraph on "Units without hydraulic module"
Hydraulic circuit cleaning procedure
• Open all control valves completely (item 22).
• Start up the unit's pump.
• Read the value of the ow on the user interface.
• Let the pump run for 2 hours continuously to clean up
the system's hydraulic circuit (presence of contaminating
solids).
• Perform another reading.
• Compare this value to the initial value.
• A reducing value of the ow rate indicates that the lters
on the system need to be removed and cleaned. In this
case, close the shut-off valves on the water inlet and outlet
(item 19) and remove the lters (items 20 and 1) after
draining the hydraulic part of the unit (items 6).
• Remove the air from the circuit (items 5 and 17).
• Repeat until all fouling is removed from the lter
Water ow rate adjustment procedure
Once the circuit is cleaned, read the ow value on the user
interface and compare it to the theoretical selection value.
If the ow rate read is greater than the specied value, this
indicates that the overall pressure drop in the system is too low
compared to the available static pressure generated by the pump.
In this case, close the control valve (item 22) and read the new
ow rate value.
Repeat as necessary, closing the control valve (item 22) until
the system's specic pressure drop corresponding to the unit's
design ow rate is achieved.
NOTE:
If the network has an excessive pressure drop in relation to
the available static pressure delivered by the unit pump, the
nominal water ow rate cannot be obtained (lower resulting
ow rate) and the difference in temperature between the water
inlet and outlet of the water type heat exchanger will be
increased
To reduce the system's hydraulic network pressure drop:
• Reduce the pressure drops of individual components
(bends, level changes, options, etc.) as much as possible;
• Use the correct pipe diameter;
• Do not extend the hydraulic systems

Pressuredrop,kPa
Waterowrate,l/s
Key
1 Unit pump curve
2 Pressure drop in the hydraulic module (to be measured on the pressure gauge installed on the
water inlet and outlet)
3 Pressure drop in the system with wide open control valve
4 Pressuredropinthesystemaftersettingthevalvetoobtainthenominalowspecied.