Regulus CSE SOL W SRS1 T User manual

Installation and Operation Manual
CSE SOL W SRS1 T SOLAR PUMP STATION, 2-20 l/min
w. electronic control & flow rate measurement
EN
CSE SOL
CSE SOL
www.regulus.eu

●connection point for an expansion vessel
●safety valve outlet, incl. extension piping terminating under the pump
station for easier connection
●
Main features
The Solar Pump Station contains all components necessary for current and
efficient operation of a solar thermal system.
An electric heating element of up to 3 kW output, or a gas boiler, or another
switched heat source can be connected to the pump station. Switching the
heat source on and off is controlled by the controller. The heat source must
be connected to the potential-free contact of the controller.
No heating element is included in supply.
The pump station consists of a Para ST 25/7-50/iPWM2 pump, SRS1 T
controller, non-return and safety valves, 2 ball valves, a pressure gauge,
thermometer, insulation and an assembly kit.
The pump station further involves:
●ball valves for filling, draining and topping up a solar thermal system
●connected temperature sensors for solar consumer (4m cable)
●solar temperature sensor (2m cable, silicone insulation)
●230V power cable w. el. plug (3m cable, PVC insulation)
Flow measurement
Installation
The pump sends electronic information on the flow rate to the controller
which then shows the indicative value on its display.
Water-glycol mixture (max. 1:1)
Tank-mount or wall-mount.
G 3/4" M
Codes in relation to a connection size
Connection
Code
17726
1. Introduction
CSE SOL W SRS1 T Solar Pump Station is fitted with a solar pump of the latest generation that
permits smooth flow control through PWM signal and sends information on the actual flow rate to the
controller that shows the value on its display. The complicated setting of the right flow rate is not
needed, the Pump Station keeps adjusting it automatically, depending on the actual solar radiation.
This means that the solar thermal system always works with the maximum possible efficiency.
2. Main features
G 1" M
17902
Cu 22 mm
17903
Cu 28 mm
17904
Application
Description
Working fluid
Cu 18 mm
18117

L
N
live
neutral
RI, R potential-free switching contact
-GND PWM
V
S2
S1
PWM control signal output
sensor 2 (solar consumer)
sensor 1 (collector)
Vi iPWM feedback signal
3. Data for the Pump Station and Accessories
Data for CSE SOL W SRS1 T Pump Station
Max. fluid working temperature
1.3 bar with the pump stopped
Max. switched current
potential-free contact (max. 3 kW)
13 A / 230 V
IP20
IP rating
2 - 20 l/min
0.8 bar at 50 °C
1.2 bar at 90 °C
1.8 bar at 110 °C
Flow rate measurement range*
Heat source switching
Min. system pressure
Min. working pressure values**
Min. working pressure values
at the suction port depending
on temperature
** for standard installations this condition is met when the initial system pressure is set following the formula (see the collector guide):
p = 1,3 + 0,1·h [bar], where h ... height from the pressure gauge to the middle of the collector array [m]]
*the pump station may be used also for systems with a higher flow rate than 20 l/min, then the controller will show the flow rate value
as > 20 l/min.
Temperature Resistance
Table for Pt1000 Sensors
7.0 kg
N
N RI R
PE
L
L
SRS1 T
CONTROLLER
-
V
Vi
S3
Pt1000
Pt1000
SOL
S3
S2
S2
S1
S1
ϑ
ϑ
Sensor S3 not included. When installing
a solar pump station in cases where
sensor S3 is required, it shall be
ordered as an accessory (see page 5)
and connected according to the SRS1
T controller instructions.
Max. working pressure
Power supply
Ambient temperature
Max. rel. humidity
Overall dimensions
Total weight
85 % at 25 °C
Pump Station internal wiring

4. Pump Station Components
1
2
3
4
5
6
7
89
10
11
12
13
14
3.1 Pump Station Pressure Drop Graph
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8 -
9 -
10 -
11 -
12 -
13 -
14 -
BALL VALVE
SOLAR CIRCULATION PUMP
NON-RETURN VALVE
FILL/DRAIN HOSE SOCKET
BALL VALVE WITH T-BRANCHE FOR
SAFETY ASSY
THERMOMETER (IN INSULATION UPPER
PART)
PRESSURE GAUGE
EXPANSION VESSEL CONNECTION
POINT, ¾” M
6 BAR SAFETY VALVE
FILLING BALL VALVE
SPANNER FOR BALL VALVES
DRAIN BALL VALVE
SRS1 T ELECTRONIC CONTROLLER
SAFETY VALVE DISCHARGE PIPE, 22 mm
diam.

The safety relief valve, expansion vessel and upper filling valve always remain connected with the
solar thermal system, even when the ball valves are shut off! Never try to isolate them from a filled
solar thermal system as there is a risk of serious injury and damage to the system!
Never close the safety valve discharge piping, it shall remain free for fluid eventually discharged by
the safety valve!
When the red mark is on the left-hand side, the non-return valve is set
to normal operation position. If you need to open the valve (e.g. to drain
the system), rotate its control so that the red dot is on the right-hand
side. The non-return function is thus out of operation.
It is important for proper operation of the pump station under normal
use to have the non-return valve control always in the right position, i.e.
the red mark on the left-hand side (see fig.).
4.1 Non-return Valve
The non-return valve prevents the tank from being cooled down by gravity circulation during periods
of no sunshine. It is located between the ball valves so it can be removed and cleaned without the
need to drain solar fluid from the entire solar circuit.
The right position during operation.
!
4.2 Ball Valves
Ball valves are intended to isolate the pump station from a solar circuit. Then it is not necessary to
drain the solar circuit for servicing (incl. cleaning the non-return valve). In order to have a more solid
hydraulic section of the pump station, the upper ball valve is fixed to the rear mounting plate.
The ball valves are controlled by a lever that is not present on the valve during operation. The valve
is closed by turning the lever clockwise by 90°, and opened by turning it anti-clockwise. Prior to
turning the lever, the upper part of the insulation needs to be removed. Thanks to that, shutting off
the solar circuit is reserved to installers and servicing staff. The user cannot simply shut off the solar
circuit, bringing about stagnation and subsequent solar fluid degradation.
The ball valves are fitted with a gland with 2 O-rings (8.7x1.8 mm) that can be easily replaced after
the control element with stops is removed and the gland nut released using a #21 spanner.
WARNING! IMPORTANT!
5. Accessories
Accessories (not included in supply)
Straight Pipe Fitting, Cu 22 x Cu 22
Straight Pipe Fitting, Cu 22 x G 3/4" M
Pt1000 temperature sensor with 4m cable (sensor S3)
7629
13695
9109
These accessories are not included in supply. The pipe fittings (7629 and 13695) are intended for
connecting a waste pipe to the safety valve. The Pt1000 temperature sensor (9109) is needed when
the pump station is to be used following the hydraulic variants 1, 2 and 3 (see chapter 7.3).
code

PUMP STATION FIXING
OPENINGS IN THE REAR
PART OF INSULATION
SRS1 T
CONTROLLER
The supply involves an installation kit that is used to fix the pump station in its place.
230 V AC,50 Hz
R1
S1
S2
R1 ... relay
S1 ... solar collector sensor
S2 ... solar consumer sensor
6. Installation Options
The solar pump station is designed to be installed on a wall or on a tank. There are two installation
openings in the insulation rear part. The lower one is accessible only after the electronic controller is
removed from the insulation rear part (see fig.).
7. Pump Station Connection Diagrams
7.1 Variant with an electric heating element

S2
S1
7.2 Variant with a gas boiler
7.3 Hydraulic Variants
12
7
R1
S2
S3 R1
S1
S2
S3
R1
S1
230 V AC,50 Hz
230 V AC,50 Hz
R1 ... relay
S1 ... solar collector sensor
S2 ... solar consumer sensor

8
7
S1
34
5S1
6
S2
R1 R1
S2
LED SIGNALS STATE DESCRIPTION AND POSSIBLE FAULT REASONS
8. Graphic Operation Signals and Performance Curves of the Pump
8.1 Pump Operation Graphic Signals
GREEN IS LIT
RED IS LIT
BLINKING RED
BLINKING RED
AND GREEN
1) pump is running in trouble-free operation
1) power supply lower/higher than 230 V
2) electric short circuit in pump
3) pump overheated
1) rotor is blocked
2) electric motor winding defect
1) unforced fluid circulation through the pump
2) pump speed lower than desired
3) air in pump
S2
S3
R1
S1
S2
S1

Q [l/min]
0
5
10
15
20
25
30
35
40
50
45
55
1200
1700
2200
2700
700
3200
3700
4200
2)
4700
P [W]
1
0 3 6
9
12 15 18 21 24 27 30 33 36 39 42 45 48 51 5754
0
1
2
H [m]
Q [l/min]
3
4
5
6
7
8
0 3 6
9
12 15 18 21 24 27 30 33 36 39 42 45 48 51 5754
15%
25%
35%
45%
55%
65%
75%
85%
1)
95%
8.2 Performance Curves for Para ST 25/7-50/iPWM2 Pump
NOTE: 1) value of PWM signal in % 2) speed in rpm

v1.3_03/2020
©2020 We reserve the right to errors, changes and improvements without prior notice.
E-mail: [email protected]
Web: www.regulus.eu
9. Filling a Solar Thermal System
For filling a solar thermal system, the ball valve above the pump must be closed and the ball valve
below the pump open. The open/closed position is indicated by a groove on the ball valve. If the
groove is pointing horizontally, the ball valve is closed; if it is pointing vertically, the ball valve is open.
See the fig. below (the grove position is marked in red).
The ball valves are operated by means of a lever handle. During normal operation, both are in the
open position. To fill the solar thermal system, close the ball valve above the pump by turning the
lever handle clockwise by a quarter turn. After filling the solar thermal system, turn the lever handle
counter-clockwise to re-open the valve.
Prior to commissioning the system, both the ball valves must be open!
open
the groove is pointing
horizontally
closed
the groove is pointing
vertically
the ball valve above the pump
the ball valve below the pump