Cli-mate CLI-AP30 Especificações descarregar pdf (Página 61)

the pump speed adjusted accordingly. The system flow rate can be further adjusted by turning the flow

restrictor screw (5/32” or 4mm Allen) on the flow meter.

ii) Nominal Flow Rate: The recommended nominal flow rate for Apricus evacuated tube solar

collectors is 0.026 G/tube/minute or 0.1L/tube/minute. Refer to section 3.5.

b) Variable Speed Operation (recommended): The Apricus Controller allows for variable speed control of

the 3 speed Grundfos pump. Refer to section 6.4 for programming details.

i) Flow Rate: When using variable speed control, the pump should always be set to Speed 3 unless

this achieves an excessive flow rate. The full speed flow rate should be no more than 1.3 gpm / 5 lpm

per 30 tube collector. The restrictor screw on the flow meter can be used to adjust the flow rate slightly.

If both full and minimum flow rates are more than 50% faster than the recommended levels, reducing

to pump Speed 2 may be required.

ii) Speed Setting: Initially, set the “Min rev pump” value to 50%, then manually test the pump operation

(Operation Menu) at this level and monitor the flow rate. The flow rate at the slowest pump operation

level should be around 40-50% of the full flow rate. Adjust the “Min rev pump” until a suitable flow rate

is achieved. 30% is the minimum possible setting.

ii) Operation: The pump will operate between the dTMax and dTMin temperature range, switching on

at 100% when dTMax is reached and reaching minimum pump speed at dTMin. If dTMin is under-run,

the pump will switch off. If the “Min rev pump” setting does not achieve a slow enough speed, reducing

the dTMin down to 2-3

F will help to prevent the pump cycling on and off throughout the day.

c) Check Valve: All Apricus pump stations are manufactured with the pump check valve installed.

7.8. Expansion Tank

a) Expansion Tank Purpose: The expansion tank is used to accept expansion of the heat transfer fluid as

it heats, preventing a pressure increase and subsequent dumping from the pressure relief valve. For a

standard domestic installation using an Apricus pump station, the 4.7 gallon expansion tank provided is a

Apricus Solar Collector Installation & Operation Manual - USA

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Cli-mate CLI-AP30 Especificações Página 61