Solarico UniQube User manual

1
UniQube Drain Back
Reservoir
Installation and Operation Manual
Read and understand this manual before
installation, commisioning and operation

2
Safety Instructions
Notes for the installer
Product Description
WARNINGS
The manufacturer of drain back reservoir does not warrant against frost damage!
Operate the installation with glycol
!
Collectors and all solar thermal piping system must be installed inclined. Collectors
must be inclined by minimum of 2% (2cm per m), pipes must be inclined by minimum
of 5% (5cm per m)
!
When product is in operating mode, some parts of it may reach temperature over
51°C. It can cause severe burns instantly or death from scalds. Children, disabled and
elderly are at highest risk of being scalded
!
Insulation, average thickness: 104 mm
Reservoir material: Stainless steel
Reservoir thickness: 2mm
Maximum working pressure: 1,5 bar
Weight: 16kg
Filling valve, leaking valve, safety valve 1,5 bar, circulating pump and connectors,
shown on pictures are not part of this product; it must be supplied in addition!
Use thick wall male nipple for connecting to connectors M and N
!
!

3
1. Installation
Drain Back reservoir must be installed in position below the lowest point of solar
thermal collectors!
Drain Back reservoir must be installed in position above the oor, in vertical position
standing on its legs
Minimum Height of installing a Drain Back reservoir in combinationwith UniQube
tanks, measured from the lowest point of its legs to the ground is 650mm
!
L ≥ 650mm L ≥ 650mm
Setup and operation procedure
The following instructions describe a fast and simple way to commissioning the installation
1. Installation of reservoir and pipe connecting
• Install the reservoir on oor standing table or on wall
• Install all pipes and valves (see page 3 and 4)
2. Filling the drain back system with glycol/water mixture
• Calculate the volume of the uid that will circulate inside the solar thermal circuit
(see page 5)
3. Pressure increasing of the solar thermal system
• Rising the pressure at 0,5 bar is important to avoid vacuum appearance while operation
(see page 6)

4
1.1 Installation Diagrams
A B CE
IJ
FG
N
M
Solar Panels (empty)
Drain Back
reservoir
UniQube
Pump O
Fluid level once complete lling
Idle
2 cm/m (2%) inclination
5 cm/m (5%)
inclination
5 cm/m (5%)
inclination
UniQube Drain Back Solar System
with separate reservoir
A B CE
IJ
FG
N
M
Drain Back
reservoir
UniQube
Solar Panels (lled)
Pump On
In Operation
2 cm/m (2%) inclination
5 cm/m (5%)
inclination
5 cm/m (5%)
inclination
UniQube Drain Back Solar System
with separate reservoir
Idle
In Operation

5
2. Filling of the system
1. Determine and calculate the overall volume of the solar thermal circuit:
Total Volume = Drain Back reservoir Volume + Heat Exchanger Volume + All Collectors Volume +
+ Pipes Volume + Volume of the Connectors, Valves, Pump and Fittings
2. Connect lling Valve ( or pumping set), Leaking Valve, Safety Valve, circulating pump
The volume of the drain back reservoir must be at least 1,5 times bigger than
the volume of the rest components of the solar thermal circuit, otherwise the
system may not work properly!
• Collector volume is declared in the technical data of the UniPlate collectors
• Heat Exchanger volume is declared in the technical data of the UniQube hot water
tanks
• The volume of copper or corrugated stainless steel pipes can be read on page 7.
Filling Valve, pump and Safety Valve, are not part of this product and must be installed
on a „cold line“ of the solar thermal circuit, on a height lower than L, i.e. below the
lowest level of the drain back reservoir
!
!
!
3. Determine the Expansion Volume of the system, from this table:
4. Leave the Leaking Valve open, connect the lling pump to the Filling Vale and then start
slowly lling until the rst leak appears on the Leaking Valve
5. Drain previously determined Expansion Volume out of the system
6. Close the Leaking Valve
7. System is lled
Total Volume Expansion Volume
50 l 3 l
51 l ÷ 100 l 6 l
101 l ÷ 150 l 9 l
151 l ÷ 200 l 12 l

6
3. Pressure increasing
A. Pressure increasing with draining and charging of previously determined volume of uid
1. Fill the solar system as described in previous chapter. Calculate the volume of uid inside
the solar system
2. Determine the Discharge Volume from the right column of the table below
B. Pressure increasing with air compressor
1. Ensure the solar thermal circuit is properly lled with glycol/water mixture, as previously
described
2. Close all valves. Connect the Air Compressor to Leaking Valve.
3. Make sure the pressure in compressed air is bigger than the pressure in solar circuit.
4. Slowly, partial open the Leaking Valve and add compressed air slowly until system
pressure increases for 0,5 bars.
5. Close the Leaking Valve.
6. System is ready to run.
3. Open the Filling Valve, open Leaking Valve and Discharge previously detemined volume.
4. Close the Leaking Valve.
5. Fill the discharged volume back into the solar system.
6. Pressure is increased.
In order to avoid vacuum appearance during the pump operating, it is important to add 0,5 bars to
the lled system. There are two ways to do it:
Volume of uid lled in the solar system Discharge Volume
20 l 10 l
21 l ÷ 40 l 20 l
41 l ÷ 60 l 30 l
61 l ÷ 80 l 40 l
81 l ÷ 100 l 50 l

7
Pipe Volume
Copper Pipe
Stainless Steel Corrugated Pipe
Dimension Volume (l/m)
Ø15 x 0,7 0,15
Ø18 x 0,7 0,22
Ø22 x 0,8 0,33
Ø28 x 0,8 0,55
Dimension Volume (l/m)
DN 16 0,24
DN 18 0,27
DN 20 0,37
DN 25 0,66
DN 32 1
DN 40 1,42
DN 50 2,33
Maximum allowed pipe
length for installed
UniQube Drain Back
UniPlate collectors / pipe
2 pc.
Ø15x0.7
3 pc.
Ø18x0.7
4 pc.
Ø22x0.8
5 pc.
Ø22x0.8
6 pc.
Ø22x0.8
UniQube DB 310 Liters 100m 60m 36m 29m X
UniQube DB 440 Liters X 48m 26m 20m 15m
Useful notes for the installers
The following table shows what is the maximum allowed pipe lenght for your solar
thermal drain back system, depending on which type of UniQube Drain Back Tank you
use, and how many UniPlate collectors you install.
The volume l/m for the stainless steel corrugated pipe can vary. Please observe the
manufacturer’s information.
• Up to 5 UniPlate collectors is allowed to be installed in a system with UniQube
Drain Back 310 liter tank
• Up to 6 UniPlate collectors is allowed to be installed in a system with UniQube
Drain Back 440 liter tank
!
!
!

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www.solarico.eu
Euroterm d.o.o.
Lece Koteski 50
Industrial area - Biljana, Prilep,
Republic of North Macedonia
tel. [phone]
fax [phone]
e-mail: [email protected]
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