Glow-worm Clearly Solar Controller Instrukcja Użytkownika Pobierz pdf (Strona 6)

System Functions

Solar gain

The installation engineer activates and congures the

solar gain function within the Fluropro installer menu.

The solar gain is determined from:

l The difference of temperature between the collector ow

and return.

l The ow rate setting of the ow rate adjuster.

l The operating time of the collector pump.

During installation the engineer sets the actual ow rate

and enters the setting into the solar control. The solar gain

is calculated and displayed by the solar control. The total

gain can be called up and reset in the installer menu.

Solar gain modulation

The rate of solar gain can be modulated to ensure the solar

heat at the bottom of the cylinder has sufcient time to

dissipate to the top of the cylinder. This maintains demand

for solar energy and prevents excessive on and off periods

that are inefcient.

The modulation is achieved by means of more frequent on

and off operations of the solar pump during solar demand.

The pump is switched on and off and the rate depends

upon the difference between the collector temperature

and lower cylinder sensor. When the activation difference

is reached, the function is started (if activated) with an

activation duration of 50 % - i.e., the pump is switched on

for 30 seconds and then switched off for 30 seconds. If the

difference in temperature increases, the activation duration

is prolonged (e.g., 45 sec. on, 15 sec. off). When the

difference in temperature decreases, the activation duration

is reduced (e.g., 20 sec. on, 40 sec. off). The period length

is always a minute.

Solar circuit protection function

If the solar heat exceeds the current heat requirement,

i.e. the cylinder is fully charged, the temperature in the

collector array can rise steeply.

To protect the solar circuit (solar pump, valves, etc.) from

overheating, if the protection temperature at the collector

sensor is exceeded, the collector pump is shut down and is

prevented from restarting even when there is a demand for

solar reheating. The solar pump is switched on again once

the system has cooled down. This function is performed

independently for each collector array. The control will

show “PROT” whilst this function is active.

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