Cosmo CSUS50STG Montage- Und Betriebsanleitung Seite 77

S O L A R T R A N S F E R S T A T I O N - 5 0 m
2
S E N S O R I N P U T
Sen. 1
Sen. 2
Sen. 3
Sen. 4
Sen. 5
Sen. 6
Sen. 7
Sen. 8
Sen. 9
Sen. 10
S11/Imp
VBus
CEU
A - PWM/0-10 V
B - PWM/0-10 V
C - PWM/0-10 V
D - PWM/0-10 V
* Please pay attention to the power consumption of the pump. It may be necessary to connect
the pump via a supplementary relay/load relay, e. g. CLR and to set the minimum revolution
speed to 100%.
( ) value in brackets is the recommended sensor position on the sensor terminal block of the
CPS....... storage tank.
S Y S T E M D E S C R I P T I O N :
The controller compares the temperature at sensor S1 with the temperature at sensors S2 and
S4. If the measured temperature differences are larger than the preset switch-on temperature
difference, the pump (R1) will be switched on, the primary circuit heats up. At the same time,
the temperature difference between S5 and S2 and S5 and S4 is determined and compared with
the switch-on temperature for the secondary pump of external heat exchangers, which can be
separately preset. If this temperature difference exceeds the set value, the pump (R4) is switched
on and the storage tank will be charged via the valves (R2) until the set maximum temperature
of the storage tank is reached. The priority logic results in preferential charging of storage tank 1.
The speed control of the solar circuit pump always tries to run at the optimum operating point to
use the solar heat as efficiently as possible.
Using the temperature sensors 7, 8 and 9, the activated control of the COSMO RMS compact
group activates a mixed return flow temperature maintenance and a maximum return limiter
(R5/R6). The controller compares the storage tank temperature (S7) and the unmixed return
temperature of the heating circuit (S8). If the moderate temperature is higher than the switch-on
temperature difference, the COSMO RMS function is activated and heat from the tank is added
to the heating return. The controller tries to increase the return temperature by +15 K
(value adjustable). A maximum return temperature of 60 °C (value adjustable) will not be exceed-
ed to ensure an efficient discharge of the storage tank and to avoid high return temperatures at
the conventional heat generator.
N O T E
Collector temperature
Storage tank 1, top (17)
Storage tank 1, bottom (1)
Ext. HE primary flow, before heat exchanger
Storage tank 1, centre (12)
Heating circuit return (in COSMO RMS station)
Heat generator return
(in COSMO RMS station)
Solar circuit pump primary - PWM signal cable
Solar circuit pump secondary - PWM signal cable
7 7
T E R M I N A L S
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11/Imp
VBus
CEU
A - PWM/0-10 V
B - PWM/0-10 V
C - PWM/0-10 V
D - PWM/0-10 V