Regulus R2BC 200 User manual

STORAGE WATER HEATERS
R2BC 200, R2BC 300, R2BC 400,
R2BC 500, R2BC 750, R2BC 1000,
R2BC 1500, R2BC 2000, R2BC 2500, R2BC 3000
EN
v. 1.6
Owners Manual

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CONTENTS
1 Description ....................................................................................................................................... 3
1.1 Models ................................................................................................................................. 3
1.2 Tank protection .................................................................................................................... 3
1.3 Thermal insulation ............................................................................................................... 3
1.4 Connection points on the tank ............................................................................................. 3
1.5 Packing ................................................................................................................................ 3
2 General Information ......................................................................................................................... 3
3 Technical Data and Dimensions of R2BC Models ........................................................................ 4
4 Operation .......................................................................................................................................... 5
5 Examples of Assigning Connection Points ................................................................................... 5
6 Installation and Commissioning ..................................................................................................... 7
7 Tank‘s Insulation .............................................................................................................................. 8
8 Maintenance, Replacement of Magnesium Anode Bar ................................................................ 9
9 Disposal ............................................................................................................................................ 9
10 Warranty ........................................................................................................................................... 9
11 Recommended Accessories ........................................................................................................... 9

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1 - Description
R2BC Storage water heater (further “tank“) with two enameled heating coils with G 5/4” connections (e.g. for
connecting a solar system and a heat pump), enabling installation of an electric heating element and also an-
other el. heating element or a finned tube heat exchanger into the flange of the lateral inspection hole.
In order to reach proper working of the tank, it is necessary to design optimum hydraulics of the whole system,
i.e. position of circulation pumps for sources and heating circuits, valves, non-return valves etc.
1.1 - Models
Ten models of 200, 300, 400, 500, 750, 1000, 1500, 2000, 2500 and 3000 l capacity enabling installation of an
electric heating rod or another heat source.
1.2 - Tank protection
Enameled inner surface and coil guarantee long service life. Enamel is done according to DIN 4753 standard.
Further qualitative improvement is reached thanks to a magnesium anode installed inside the tank. From the
volume of 400 l upwards each tank has 2 anode rods. The 3000l tank has 3 anodes.
1.3 - Thermal insulation
Tanks of volume up to 500 l are supplied with a hard polyurethane insulation 50 mm thick with a white PVC
surface. Tanks of 750 and 1000 l volume are supplied with a hard polyurethane insulation 75 mm thick with
a white leatherette surface. Tanks of 1500, 2000, 2500 and 3000 l volume have the insulation 100 mm thick.
The insulation can be detached for easier handling.
1.4 - Connection points on the tank
4× lateral with G 5/4“ inner thread, to the heating coils
2× lateral with G 5/4“ inner thread, for cold water inlet and hot water outlet
3× lateral with G 1/2“ inner thread, for temperature probes and a thermometer
1× lateral with G 1“ inner thread, for recirculation
1× top with G 5/4“ inner thread, for a magnesium anode rod
1× lateral with G 6/4“ inner thread, for an el. heating rod
1× flange for the lateral inspection hole
1.5 - Packing
Tanks are delivered standing, each screwed to its pallet, packed in bubble wrap. It is forbidden to transport
and/or store the storage tanks in a horizontal position.
2 - General Information
This Owners Manual is an integral and important part of the product and must be handed over to the User.
Read carefully the instructions in this Manual as they contain important information concerning safety, installa-
tion, operation and maintenance. Keep this Manual for later reference.
Using the tank for other purposes than stated above is forbidden and the manufacturer accepts no responsibil-
ity for damage caused by improper or wrong use.

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3 - Technical Data and Dimensions of R2BC Models
Tank code ................................................................................ a
Tank total volume .................................................................... b
Volume of the upper heating coil ............................................ c
Volume of the lower heating coil ............................................. d
Surface of the upper heating coil ............................................ e
Surface of the lower heating coil ............................................. f
Empty weight (transport) ......................................................... g
Max. working temperature - tank ............................................ 95 °C
Max. working temperature - heating coils .............................. 110 °C
Max. working pressure - tank ................................................. 10 bar
Max. working pressure - heating coils ................................... 10 bar
DHW heating ∆t=35 °C (80/60 - 10/45) - upper coil ............. h
DHW heating ∆t=35 °C (80/60 - 10/45) - lower coil .............. i
Values in brackets are valid for tanks R2BC200 - R2BC400
Model R2BC
200
R2BC
300
R2BC
400
R2BC
500
R2BC
750
R2BC
1000
R2BC
1500
R2BC
2000
R2BC
2500
R2BC
3000
Tank code a 6481 6482 6483 6484 6485 5758 8478 8479 12432 8474
Tank volume [l] b 200 300 400 500 750 1000 1500 2000 2500 3000
Volume of the upper heating coil [l] c 4.9 5.6 5.6 5.6 13.4 14 14 19 21.5 22.5
Volume of the lower heating coil [l] d 4.9 9.5 11 11 13.4 14 26.5 28.5 29.5 31.5
Surface of the upper heating coil [m2]e0.8 0.9 0.9 0.9 2.4 2.5 2.5 3 3.5 3.8
Surface of the lower heating coil [m2]f0.8 1.5 1.9 1.9 2.4 2.5 4.2 4.5 4.8 5.2
Empty weight [kg] g 96 124 150 168 270 285 302 465 543 600
DHW heating ∆t=35 °C (80/60 - 10/45) -
upper coil [l/h] ([kW]) h680 (27.7)
760
(31.1)
760
(31.1)
760
(31.1)
2000
(81.3)
2090
(84.7)
1850
(75)
2170
(88)
2612
(106)
2744
(112)
DHW heating ∆t=35 °C (80/60 - 10/45) -
lower coil [l/h] ([kW]) i680 (27.7)
1280
(51.9)
1620
(65.8)
1620
(65.8)
2000
(81.3)
2090
(84.7)
3138
(128)
3362
(137)
3552
(145)
3885
(158)
Dimensions [mm] A 1265 1710 1690 1780 1870 2120 2285 2550 2680 2980
B929 1384 1411 1480 1460 1680 1825 2090 2130 2430
C629 914 891 949 890 890 1255 1310 1400 1400
D258 257 268 335 400 400 520 550 640 640
E67 67 79 175 220 220 315 340 430 430
F264 264 286 305 385 385 470 460 550 550
G474 657 660 685 685 685 582 985 1075 1075
H579 849 846 865 835 835 1180 1160 1250 1300
I679 979 1011 985 990 990 1330 1450 1540 1790
J914 1214 1245 1285 1340 1340 1500 1825 1905 2205
K884 1141 1163 1235 1235 1235 1460 1650 1740 2040
L994 1294 1361 1335 1440 1440 1735 2000 2040 2340
M1164 1608 1581 1595 1590 1840 1935 2210 2240 2550
ø N 610 610 710 760 950 950 1200 1300 1400 1400
ø O 500 500 600 650 790 790 1000 1100 1200 1200
Tipping height without insulation [mm] 2012 2188 2281 2548 2640 2979
A
B
C
D
E
F
HIJKLM
G 6/4“
G 5/4"
(G 1")
G 1/2“
G 1/2“
ø114
ø O
1
2
3
12
11
G 1/2“
G
G 1" (G 3/4")
4
5
6
7
8
9
10
30°
Insulation
ø N
G 5/4“
G 5/4“
G 5/4“
G 5/4“
G 5/4" (G 1")
G 5/4“
ø168
„S“
„S“

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4 - Operation
This tank is designed for operation in closed pressure circuits. Hot water is heated in the integrated hot-water
heat exchangers (heating coils) inside the tank from several possible heat sources like various kinds of heating
boilers, renewable energy sources (heat pumps, solar collectors).
Hot water temperature should be set to 60-65 °C. This temperature guarantees the best operation and at the
same time, it prevents formation of Legionella bacteria.
5 - Examples of Assigning Connection Points
Example I.
With a gas boiler and a solar system.
R2BC E
E
T
bbbbb
B
bbb
DHW
cold water
recirculation
gas boiler
Connection point Example I.
with a gas boiler
Example II.
with a boiler and accumulation tank
Example III.
with a heat pump
1magnesium anode magnesium anode magnesium anode
2thermometer thermometer thermometer
3plug electric heating rod electric heating rod
4cold water inlet cold water inlet cold water inlet
5outlet to a solar system outlet to a solar system return line to a heat pump
6temperature probe, thermostat temperature probe, thermostat temperature probe, thermostat
7inlet from a solar system inlet from a solar system inlet from a heat pump
8return line to a gas boiler return line to an accumulation tank return line to a fireplace
9temperature probe, thermostat temperature probe, thermostat temperature probe, thermostat
10 recirculation recirculation recirculation
11 inlet from a gas boiler inlet from an accumulation tank inlet from a fireplace
12 hot water outlet hot water outlet hot water outlet
flange blinded blinded solar heat exchanger
Connections depend on the circuit to be connected, the a.m. examples are informative only.

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Example II.
With a solid fuel boiler, solar system and accumulation tank.
Example III.
With a heat pump, solar system and non-regulated solid-fuel source.
DHW
cold water
recirculation
boiler
PS
R2BC E
E
T
bbbbb
B
bbb
DHW
cold water
recirculation
R2BC
HEAT PUMP
EcoAir
E
E
T
bbbbb
B
bbb
fireplace
accumulation
accumulation

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6 - Installation and Commissioning
Installation must meet valid rules and may be done only by qualified staff. The tank shall be placed on the
floor, as close to the heat source as possible.
Defects caused by improper installation, use or handling are not covered by warranty.
6.1 - Connection to heat sources
Connect heating circuits to the inlets to and outlets from heating coils. The heat source for the tank - an enam-
eled coil - connects with G 5/4” couplings.
6.2 - Connection to a solar system
The tank can be used with a solar system. In such a case, the inlet for hot heat-carrying liquid coming from the
solar system shall be connected to the upper sleeve of the G 5/4” heating coil and the lower outlet to the return
piping to the solar system. Insulate all the piping between the tank and the solar system.
6.3 - Heating rod installation
The G 6/4“ side sleeve is designed to accommodate an electric heating rod. Heating rods of output up to 12
kW can be used (depending on the tank diameter and rod length), connected either directly to the mains (ther-
mostat-equipped rods), or to a heating system controller. The installation may be done by qualified staff only.
Warning: Electric heating elements shall be protected by a safety thermostat.
6.4 - Connection to water mains
DHW piping shall be done according to valid rules. G 5/4” threaded couplers are used to connect the tank to
a cold water inlet and hot water outlet. A 6bar safety valve shall be installed at the cold water inlet. Installation
of a reducing valve to the tank inlet is recommended. If the pressure from water mains exceeds 6 bar, a reduc-
ing valve is necessary. In order to prevent water loss, an expansion tank should be installed at the cold water
inlet as well (8 l volume for R2BC 200, 12 l volume for R2BC 300 and 400, 18 l volume for R2BC 500, 24 l vol-
ume for R2BC 750, 35 l volume for R2BC 1000, 60 l volume for R2BC 1500, 80 l volume for R2BC 2000, 100 l
volume for R2BC 2500 and 2×60 l volume for R2BC 3000).
Should the water be too hard, install a water softener before the tank. In case the water contains mechanical
impurities, install a strainer.
A suitable thermostatic mixing valve should be installed at the hot-water outlet from the tank, preventing too
hot water from entering the taps.
Install a drain valve to the lowest point of the tank.
Complete DHW piping shall be properly insulated.
6.5 - Electronic anode rod installation
A so called electronic anode can be used instead of the magnesium one. Its principle advantage is that its
proper function is signaled by a control lamp while a magnesium anode rod needs to be taken out for check. In
such a case, just visual check of the indication lamp of the electronic anode is sufficient.
Please use a G 5/4” to G ½” reducing coupler when installing an electronic anode. A space equal to the anode
length (see the table below) is needed between the tank top and ceiling to install/exchange the electronic an-
ode rod. In order to protect the tank properly and meet its warranty conditions, select an anode from the table
below.
Kit for R2BC storage water heaters
Code Anode rod length [mm] For storage water heaters
9173 350 (200/150) R2BC 200
9174 500 (350/150) R2BC 300, R2BC 400, R2BC 500
9175 750 (550/200) R2BC 750, R2BC 1000
Table of limit values for total dissolved solids in hot water
Description pH Total dissolved
solids (TDS)
Ca Chlorides Mg Na Fe
Max. value 6.5 - 9.5 600 mg/l 40 mg/l 100 mg/l 20 mg/l 200 mg/l 0,2 mg/l

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6.6 - Commissioning
Fill the heating circuits with the appropriate fluids and air-bleed the entire system. Check all connections for
leaks and verify the system pressure.
The quality of top-up and heating water is set by ČSN 07 7401:1992. Hot water quality must meet the con-
ditions shown in the Table of limit values for total dissolved solids in hot water, page 7 of this Manual.
Fill the heating circuits with the appropriate fluids and air-bleed the entire system. Check all connections for
leaks and verify the system pressure. Set the heating controller in compliance with the documentation and
manufacturer’s recommendations. Check regularly a proper function of all control and adjusting elements.
7 - Tank‘s Insulation
Product description
Thermal insulation is a component of tanks that prevents heat losses. Thermal insulation of hard polyurethane
foam with zipped PVC layer is used.
Warning
Insulation dismantling and installation shall be done in two or three persons, depending on the tank size. The
hard-foam insulation with zipper must not be dismantled/installed at temperatures below 20 °C. If this can-
not be avoided, the insulation shall be pre-warmed in another room to at least 20 °C. It is impossible to install
insulation of lower temperature, there is a risk of damage, esp. to the zipper.
Do not use any tools for installation.
Keep away from open fire.
Warranty on insulation
□Warranty shall become null and void if:
○the product was used for other purposes than intended.
□Warranty does not cover:
○usual wear and tear,
○damage caused by fire, water, electricity or a natural disaster,
○defects caused by failure to use the product in compliance with its intended purpose,
by improper use and insufficient maintenance,
○defects caused by mechanical damage to the product,
○defects caused by tampering or incompetent repair.

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8 - Maintenance, Replacement of Magnesi-
um Anode Rod
If the tank is fitted with a heating element, disconnect it from the mains first. Clean the exterior of the tank with
a soft cloth and a mild detergent. Never use abrasive cleaners or solvents.
Check all connections for leaks.
The tanks are equipped with an anti-corrosion sacrifice magnesium anode rod. The anode rod shall be chec-
ked within 12 months after commissioning and subsequently always not later than 12 months after the last
check. In locations where water contains more ferrites or calcites, it is recommended to check the anode every
6 months. If more than 1/3 of its total volume is consumed, the anode shall be replaced with a new one. Dis-
regarded of its state, the anode rod shall be replaced with a new one within 24 months from commissioning.
In case an electronic anode is used, the above described procedures are not necessary. Then only a visual
check of the indication lamp is necessary every 3 months.
Proper working of the Electronic Anode is described in its User’s Manual.
If damage to a tank occurs due to neglected substitution of a magnesium anode rod or a non-working electro-
nic anode, warranty cannot be claimed.
9 - Disposal
Packing shall be disposed of in compliance with the valid rules. When the product reaches the end of its life, it
shall not be disposed of as household waste. It shall be dropped off at a Local Waste Recycling Center. Insu-
lation shall be recycled as plastic and the steel vessel as scrap iron.
10 - Warranty
This product is covered by warranty according to the conditions described in this Manual and according to the
Warranty Certificate. A Warranty Certificate is an integral part of the supply. Tank transport or storing in a hori-
zontal position is considered a warranty violation!
11 - Recommended Accessories
11.1 Expansion vessels for storage water heaters
The inner surface of R2BC hot water tanks as well as the heating coils are enameled. In order to compens-
ate for fluctuations in temperature and pressure, and avoid damage to the enameled surface, installation of
a properly sized expansion vessel is necessary. This vessel also saves water escaping through a safety valve
during warm-up. A calculation of the expansion vessel volume shall be included in the heating design. The
volumes of expansion vessels in the table are informative only. Working pressure 2-8 bar and domestic water
temperature inside the tank 10-70 °C are presumed. For tanks of bigger volumes, use of an expansion auto-
mat is recommended.
Hot-water tank volume [l] Expansion vessel volume [l]
200 8
300 12
400 12
500 18
750 24
1000 35

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G 6/4” thread, nickel-plated copper power output
(kW)
voltage
(V)
length L
(mm) code
2 230 245 8935
3 230 305 8936
4.5 3 × 230 370 8937
6 3 × 230 495 8938
7.5 3 × 400 585 8939
9 3 × 400 680 8940
12 3 × 400 815 8941
G 6/4” thread, stainless steel, thermostatic head, adjustable by a knob power output
(kW)
voltage
(V)
length L
(mm) code
2 230 V 315 11783
3 230 V 350 11784
2 3 × 230 V 225 11787
3 3 × 230 V 285 11788
4.5 3 × 230 V 383 11789
6 3 × 400 V 478 11216
7.5 3 × 400 V 570 11215
9 3 × 400 V 665 11214
11.2 - Electric heating rods and a mounting flange for the inspection hole
Electric heating rods can be used in storage water heaters and in accumulation tanks. They can be power
supplied either by 230V or 3 × 230V/400V. Heating rods of output 2-12 kW can be installed into these tanks,
into the sleeves with G 6/4” inner thread (the right type should be selected with respect to its length and the
tank diameter). Electric heating rods are currently made of nickel-plated copper. They can be also supplied in
a copper or stainless-steel version. Heating rods with an integrated electronic thermostat and a safety thermo-
stat are also available.
Flange enabling installation of an electric heating rod into the lower inspection hole. flange
diameter flange thread code
170 mm inner
G 6/4“ 7376
L75
100 L
100

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11.4 - Watersoft N electromagnetic water treatment device
The device for electromagnetic water treatment, Watersoft N, uses no chemicals. It softens water, prevents
scale formation and dissolves existing sediments. It is particularly suitable for use with devices with thermally
stressed spots like heat exchangers and storage water heaters. Among its advantages is a quick and easy
installation, no need for plumber’s intervention and min. operation costs (consumption of el. energy 2W).
11.5 - Additives for heating systems
MR-501/F
Protective liquid made of organic compounds, intended for use in heating and cooling systems, solar collec-
tors and heat pumps. It prevents corrosion of metals (iron, copper, aluminum etc.) and their alloys by creating
a film on the surface that is in touch with the heating liquid. It can be mixed with antifreeze fluids. Recommen-
ded use: after cleaning the system with M 501/R.
MR-501/96P
Liquid agent of balanced efficiency for underfloor heating, solar panels and plastic piping. It creates a prote-
ctive film and prevents growth of algae and gas formation. The system is also protected against calcareous
sediments. This well-balanced mixture of corrosion inhibitors and protective film creating compounds ensures
a max. protection of underfloor heating and solar panel circuits.
MR-501/R (1kg)
Concentrated alkaline anti-corrosion liquid removing scale and calcareous sediments from heating systems.
It dissolves scale and rust and makes it possible to remove them by flushing the system. 2 liters of MR-501/R
shall be added to every 80-100 l of heating water and let to act for 2-3 weeks depending on the degree of sedi-
mentation. Then the heating system shall be drained and flushed. When filling new water, it should be treated
by adding the protective liquid MR 501/F.
Model WATERSOFT N
Operation indication green LED
Version wall mount
Power supply 230V / 50Hz
Power input max. 2W
El. protection IP 65
Dimensions 70 × 50 × 34 (mm)
Max. pipe diam. 1 ½“
Max. water flow 4m3/h
11.3 - Tube heat exchangers and their mounting flange
When needed, a finned tube heat exchanger may be installed into the appropriate flange (code 8375), into the
lateral inspection hole instead of a plug.
Picture surface
[m2]
coil length
[mm]
coil diameter
[mm] connection code
0.94 400 110 3/4“ 8377
1.51 700 110 3/4“ 8378*
Flange dimensions:
diameter: 170 mm, diameter of holes for the heat
exchanger: 30 mm, center-to-center distance: ca 55 mm
8375
* due to its length, the heat exchanger can be used for tanks of 750 l volume and over.

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REGULUS spol. s r.o.
Do Koutů1897/3 http://www.regulus.eu
CZ-143 00 Praha 4 E-mail: [email protected]
Date of purchase:....................................
Stamp print, signature of the salesman and address of the shop:
1. The warranty period is 60 months from the date of purchase.
2. When claiming warranty, this Warranty Certificate must be submitted together with the
purchase receipt.
3. The warranty is valid only when the technical conditions set by this Manual are maintained
and installation is done by an authorized person (confirmed in the Warranty Certificate).
4. The claimed defect must not be caused by tampering, improper installation and operation,
using the product for other purposes than intended, placing the product in improper
environment, or by a natural disaster.
5. Claims shall be settled by your dealer at the address shown below.
for R2BC Storage Water Heaters
WARRANTY CERTIFICATE
Date of a professional installation by plumber: .......................................
Stamp print, signature and address of the authorized person:
WARRANTY CONDITIONS
Model: ..............................................................................
Serial number: ..................................................................