Regulus CSE2 SOL G P User manual

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CSE2 SOL W P
CSE2 SOL W P
EN
Installation and Operation Manual
CSE2 SOL W P SOLAR PUMP STATION

1. Introduction
Thanks to its design, CSE2 SOL W P solar pump station enables a simple and quick conenction
into a solar circuit. It is tted with a high-e󰀩ciency solar pump of the latest generation that permits
continous ow control.
The pump station is designed for controllers with PWM-C. The pump will not run without a PWM-C
signal. iPWM signal can be read from the pump, for current ow rate measurements.
2. Pump Station Description
Main Features
Application This twin-line solar pump station contains all components (except for a
controller) necessary for current and e󰀩cient operation.
Description The pump station consist of a Para ST 25 / 7-50 / iPWM2 pump, check and
safety valves, 3 ball valves, ow indicator, pressure gauge, air separator
with air discharge, thermometer, installation kit and insulation.
The pump station further involves:
● connection point for an expansion vessel
● safety valve outlet
● ball valves for lling, draining and topping up a solar thermal system
Installation on a tank or wall
Working uid water-glycol mixture (max. 1:1)
Codes corresponding to connection sizes
Connection G 3/4“ M G 1“ M
Flow measurement range 2-12 l/min 8-28 l/min
Code 19985 19988
3. Pump Station Data
Data for CSE2 SOL W P Pump Station
Max. uid working temperature 110 °C
Max. working pressure 6 bar
Min. system pressure 1.3 bar with the pump stopped
Power supply 230 V, 50 Hz
IP rating IP20
Ambient temperature 5 - 40 °C
Max. relative humidity 85 % at 25 °C
Insulation material EPP RG 60 g/l
Overall dimensions (H x W x D) 490 x 310 x 155 mm
Total weight 5.9 kg
Min. values of working pressure**
Values of min. working pressure
at the pump suction port
depending on temperature
0,8 bar at 50 °C
1,2 bar at 90 °C
1,8 bar at 110 °C
** this condition is met for current installations when the initial system pressure is set following the formula (see the Instructions for

3.1 Pressure drop diagram
1 - FLOWRATE INDICATOR W. BALL VALVE
2 - CIRCULATION PUMP
3 - CHECK VALVE
4 - BALL VALVE ON THE INCOMING PIPE
FROM SOLAR COLLECTORS
5 - BALL VALVE W. SIDE OUTLET FOR
SAFETY GROUP
6 - THERMOMETER (IN THE UPPER PART
OF INSULATION)
7 - PRESSURE GAUGE
8 - EXPANSION VESSEL CONNECTION
POINT, 3/4“ M
9 - 6 BAR SAFETY VALVE
10 - 3/4“ M FILL/DRAIN BALL VALVE
11 - SPANNER FOR CONTROL OF BALL
VALVE W. SIDE OUTLET AND BALL VALVE
OF THE INCOMING PIPE
12 - 3/4“ M FILL/DRAIN BALL VALVE
13 - AIR SEPARATOR W. AIR VENT VALVE
4. Pump Station Components
1
12
3
10
7
4
6
8
5
9
2
11
13
G 3/4“ M connection - code 19985 G 3/4“ M connection - code 19998

4.1 Check valve
The check valve prevents the tank from cooling down due to gravity circulation when the sun is not
shining. It is located below the ball valves and can therefore be removed and cleaned without having
to drain the solar uid from the entire circuit.
4.2 Ball valves
Ball valves are used to separate the pump station from the solar circuit. During servicing (including
cleaning of the check valve) there is no need to drain the uid from the solar system. For greater
rigidity of the hydraulic part of the pump station, the upper ball valve is attached to the xing back
plate.
The upper ball valves are operated by a lever which is not located on the valve during operation.
A wrench or pliers must be used to operate the lower ball valve, which is part of the ow indicator.
Turning the lever or the key or pliers a quarter turn to the right closes the ball valve. It opens when
the lever is turned to the left. Before closing / opening the ball valve, it is necessary to remove the top
part of the insulation. As a result, closing the system is reserved for installation or service technici-
ans only. Thus, the user cannot simply close the solar circuit and cause stagnation and subsequent
degradation of the solar uid.
The ball valves are equipped with a spindle packing with two O-rings with dimensions of 8.7x1.8
mm that can be easily replaced by removing the control element with stop ends and loosening the
packing nut with a # 21 spanner.
WARNING! IMPORTANT!
The safety valve, expansion vessel and upper ll/drain ball valve always remain connected to the
solar thermal system, even if the ball valves are closed! For this reason, never try to separate them
from the lled solar system, as there is a risk of serious injury and damage to the solar system!
Never close the drain line of the safety valve, it must always be free for any liquid leaking from the
safety valve!
5. Air Separator with Air Vent Valve
In order to remove air from the circuit perfectly, the pump station is equipped
with a so-called air separator with an air vent valve. After lling or topping up the
uid in the circuit and during the pre-season check, it is always recommended
to release the air using the air vent valve.

6. Installation Options
The solar pump station is designed to be mounted on a wall or a tank. In the rear section of the in-
sulation there are three mounting holes. The two upper holes are intended for installation on a wall
using the mounting kit included in supply. The two lower holes are intended for installation on a tank
(160 mm pitch) using the mounting kit included in supply. When mounting the pump station on a
tank, use large washers between the tank and pump station for both the holes; the third washer shall
be used for the lowest hole between the bolt head (M6x25) and the pump station. The washers are
included in supply.
7. Pump Station Connection Diagram
Contents of the mounting kit included in supply:
- for wall mount:
2 dowels, 8 TX
2 truss head screw, 5x50
2 large washers, (3xD)6.4
- or tank mount:
1 socket hex pan-head screw, M6x16 (middle hole)
1 socket hex pan-head screw, M6x25 (lower hole)
3 large washers, (3xD)6.4
Openings for wall mounting
Openings for tank mounting
KEY
1 – hot water storage tank
2 – el. heating element w. thermostat
3 – solar collectors
4 – CSE2 SOL solar pump station
5 – pump station for DHW recirculation – CSE TVMIX ZV
6 – safety kit for HW storage tank
7 – solar expansion vessel
8 – DHW expansion vessel
SV – cold water
TV – hot water
CV – hot water recirculation
KK – ball valve
ZV – check valve
AOV – automatic air vent valve
PTR – pressure temperature relief valve
REDV – pressure reducing valve (optional)
VK – drain valve
SVE – expansion vessel service valve

8. Wilo-Para iPWM2 Pump
The Wilo Para 25/7 iPWM2 is a wet running circulation pump. The
pump speed is controlled by the PWM signal. When the PWM
signal is disconnected, the pump stops running (a pump for solar
thermal systems). The operating status and possible faults of the
pump are indicated by LEDs directly on the pump. The pump
is able to send the current flowrate electronically to an external
controller. The controller must be equipped with an iPWM read
input and a flow calculation function.
The high efficiency circulation pumps of the PARA iPWM2 series
are used exclusively for the circulation of liquids in solar thermal
systems. Operating the pump in other systems or in systems containing too little water, air bubbles
or not pressurized can lead to its rapid destruction.
8.1 Performance curves
NOTE:
1) PWM signal value in %,
2) speed in 1/min

8.2 Technical Data
Wilo PARA 25/7 iPWM2
Electric Data
Power supply 1 ~ 230 V, 50 Hz
Power input (min./max.) 1.8 / 50 W
Current (min./max.) 0.02 / 0,43 A
Max. speed 4700 rpm
Energy Efficiency Index ≤ 0.20 by EN 16 297/3
IP rating IPX4D
Motor protection integrated
Operating Parameters
Fluid working temperature -10 to 110 °C
Max. static pressure 10 bar
8.3 Visual indication of pump operation
The LED light signals a defect. The pump will switch off (depending on the defect
type) and try to restart.
LED Signals State Description and Possible Fault Reasons
GREEN IS LIT 1 - pump is running in trouble-free operation
RED IS LIT 1 - rotor is blocked
2 - electric motor winding defect
BLINKING RED
1 - power supply lower/higher than 230 V
2 - electric short circuit in pump
3 - pump overheated
BLINKING RED AND GREEN
1 - unforced uid circulation through the pump
2 - pump speed lower than desired
3 - air in pump
If the fault cannot be rectified, contact a qualified technician.
POZOR! DŮLEŽITÉ!
For the pump to run, it is necessary to connect a controller that controls the pump speed throu-
gh a PWM-C signal for solar pumps. The pump is switched on and o󰀨 and it speed changes
within the range set by its performance curves (see page 6) depending on the PWM-C signal
value. The pump connects to a controller using the PWM signal cable, included in supply.
OPERATION OF THE PUMP WITHOUT A PWM SIGNAL IS NOT POSSIBLE!

9. Filling a Solar Thermal System
For lling a solar thermal system, the ball valve above the pump must be closed and the ball valve
below the pump and on the incoming pipe from solar collectors open. The ball valves above the
pump are operated by means of the enclosed spanner. Connect the lling pump to the ll and
drain ball valves using hoses – see Chap. 4, and open these valves.
Prior to commissioning the system, all the three ball valves must be open!
8.4 Wilo PARA 25/7 iPWM2 Pump Wiring
L (brown)
N (blue)
PE (yellow-green)
PWM in (brown)
PWM GND (blue)
iPWM out (black)
The pump must be wired / disconnected by a qualified person in compliance with EN 50110-1!
OPEN
OPEN
THIS VALVE MUST BE
CLOSED
1.POWER SUPPLY (230 V, 50 Hz) 2.CONTROL (PWM)

10. Solar System Air Venting
• During operation of the lling pump, close the lower drain valve and increase the pressure to
about 5 bar;
• close the upper lling valve and turn o󰀨 the lling pump, open the ball valve above the pump, do
not disconnect the lling pump hoses!
• Set the circulation pump to the highest level in the constant speed mode and, by turning it on and
o󰀨 several times, vent the system using the air vent valve of the air separator and other automa-
tic air vent valves, especially on the solar collectors and others, if they are installed in the system
(the de-aerated pump works almost silently);
• continuously monitor the system pressure and if it drops, increase it to 5 bar by turning on the
lling pump and opening the lling valve;
• repeat the venting until the oat of the ow indicator takes a stable position during pump opera-
tion, shows a measurable ow and no bubbles appear in the sight glass. Then let the circulation
pump run for at least 5 minutes;
• close the air vent valve of the air separator after air discharge is complete, and if an automatic
venting valve(s) is (are) anywhere in the solar circuit, also close this valve after venting.
After lling and air venting the solar thermal system, close the ll/drain ball valve, adjust the sys-
tem pressure to the required value, disconnect the hoses of the lling pump and re-open the ball
valve above the pump.

©2023 We reserve the right to errors, changes and improvements without prior notice.
REGULUS spol. s r.o.
E-mail: [email protected]
Web: www.regulus.eu
v1.0-07/2023