Regulus HSK PV Owner's manual

www.regulus.eu
HSK PV
HSK PV
EN
Installation and Operation Instructions
THERMAL STORES with stainless-steel DHW tube heat exchanger
HSK 600 PV, HSK 750 PV, HSK1000 PV, HSK 1700 PV

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CONTENTS
1 Description ..................................................................................................................................................... 3
1.1 Models ............................................................................................................................................... 3
1.2 Tank protection ................................................................................................................................... 3
1.3 Thermal insulation ............................................................................................................................. 3
1.4 Packaging .......................................................................................................................................... 3
2 General Information ....................................................................................................................................... 3
3 Technical Data and Dimensions of HSK PV Model Line ............................................................................... 4
4 Operation ........................................................................................................................................................ 12
5 Typical Layout Examples with Thermal Store ............................................................................................. 12
6 Installation and Commissioning ................................................................................................................... 13
7 Installing Insulation on the Tank .................................................................................................................. 13
8 Maintenance ................................................................................................................................................... 15
9 Disposal .......................................................................................................................................................... 15
10 Warranty .......................................................................................................................................................... 15

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1 - Description
HSK PV Thermal Stores are intended for storing and subsequent distribution of thermal energy of heating water. They
are fitted with a stainless-steel tube DHW heat exchanger, permitting installation of electric heating elements and
connection of other heat sources. For a better thermal layering, the tank volume is separated by a baffle.
For proper operation of a tank, it is necessary to have an optimum hydraulic design of the entire heating system, i.e.
position of circulation pumps for both heat sources and heating circuits, valves, check valves etc. When more heat
sources shall be combined, it is recommended to use a smart controller for both the heat source and heat sink sides
of a heating circuit, i.e. also for charging and discharging a thermal store.
1.1 - Models
Four models of 557, 757, 922 and 1684 l total volume, with stainless-steel tube DHW heat exchanger.
1.2 - Tank protection
The thermal store has no inner surface nish, the outer surface is painted in gray. The DHW heat exchanger is
made of stainless steel.
1.3 - Thermal insulation
Thermal insulation is available as a separate item. For easier handling, the insulation shall not be fitted on the tank
until it reaches its definite place of installation. This is a fleece insulation, 100 mm thick, with a hard polystyrene surfa-
ce. It is closed by quick locks.
1.4 - Packaging
Thermal stores are delivered standing, each screwed to its pallet, packed in bubble wrap.
It is forbidden to transport and/or store the thermal stores 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, installation, operation
and maintenance. Keep this Manual for later reference. The appliance shall be installed by a qualified person
according to valid rules and Manufacturer‘s Instructions.
This appliance is designed to accumulate thermal energy and distribute it subsequently. It must be connected to a
heating system and heat sources. This appliance is suitable for continuous heating of domestic hot water.
Using the thermal store for other purposes than above described is forbidden and the manufacturer accepts no
responsibility for damage caused by improper or wrong use or filling procedure.
The appliance shall be installed by a qualified person according to valid rules, otherwise the warranty becomes null
and void.

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HSK 600 PV Combination Thermal Store
Main features
Application accumulation of thermal energy for space and DHW heating
Description
this combination Thermal Store utilizes a heat pump with
PV panels as a heat source for both space and DHW heating;
DHW is being prepared in 2 integrated stainless-steel heat
exchangers; a tightly tting separating metal plate increases
the heat pump’s seasonal coe󰀩cient of performance,
a dedicated PV heating element is placed in the lower
tank section; more electric heating elements can be
installed if needed
Working uid
water (DHW heat exchanger)
water; water/glycol mixture (max. 1:1)
or water/glycerine mixture (max. 2:1) (thermal store)
Code
Thermal Store 16158
Insulation 18839
Energy E󰀩ciency Data (as per EC Regulation No. 812/2013)
HSK 600 PV with insulation
Energy e󰀩ciency class N/A
Standing loss 99 W
Storage volume 557 l
Technical Data
Total tank volume 557 l
Fluid volume in tank 525 l
Fluid volume above the separating plate 235 l
Fluid volume below the separating plate 290 l
Upper DHW heat exchanger volume 21 l
Lower DHW heat exchanger volume 11 l
DHW heat exchanger surface area 6 m2
Plocha výměníku TV pod dělicím plechem 3 m2
Max. working temperature in Thermal Store 95 °C
Max. working temperature in DHW HE 95 °C
Max. working pressure in Thermal Store 4 bar
Max. working pressure in DHW HE 10 bar
Tank Materials
Tank material S235JR
DHW heat exchanger material AlSl 316 L
Insulation Materials
Tank perimeter insulation eece
Tank perimeter insulation outer surface hard polystyrene
Top and bottom tank insulation eece
Dimensions, Tipping height, Insulation thickness, Weight
Tank diameter 650 mm
Tank diameter with insulation 850 mm
Tank overall height 1935 mm
Tipping height without insulation 2050 mm
Tank perimeter insulation thickness 100 mm
Bottom insulation thickness 50 mm
Top insulation thickness 120 mm
Empty weight without insulation 157 kg
HSK 600 PV with insulation
HSK 600 PV
3 - Technical Data and Dimensions of HSK PV Model Line

5 │
HSK 600 PV Combination Thermal Store
Dimensions
TAPPINGS
pos. description connec-
tion
height
[mm]
Heat sources
B1 Incoming from heat source G 6/4“ F 1985
B2 Return to heat source G 6/4“ F 1135
B3 Incoming from heat source G 6/4“ F 1570
B4 Return to heat source G 6/4“ F 1090
B5 Incoming from heat source G 1“ F/4 1570
B6 Incoming from heat source G 6/4“ F 1660
Heating system
H1 Supply to the heating circuit G 1“ F/4 1030
H2 Returnable from the heating circuit G 1“ F/4 1365
El . heating elements
E1 Electric heating element for DHW heating G 6/4“ F 1150
E2 Electric heating element for space heating G 6/4“ F 1890
E3 Electric heating element for space heating G 6/4“ F 1890
E4 Electric heating element for PV system G 6/4“ F 1310
DHW heating
W1 Cold water G 1“ M/4 1285
W2 Hot water G 1“ M/4 1110
W3 Circulation G 1“ M/4 1110
W4 Hot water G 1“ M/4 1970
Control and safety
C1 Temperature sensor G 1/2“ F 1000
C2 Temperature sensor G 1/2“ F 1625
C3 Temperature sensor G 1/2“ F 1310
C4 Temperature sensor G 1/2“ F 1220
T2Thermometer G 1/2“ F 1635
M2Pressure gauge G 1/2“ F 1510
P2Safety valve G 1/2“ F 1400
Air release
O2Air vent valve G 1/2“ F 1935
Tipping height without insulation 2050 mm

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HSK 750 PV Combination Thermal Store
Main features
Application accumulation of thermal energy for space and DHW heating
Description
this combination Thermal Store utilizes a heat pump with
PV panels as a heat source for both space and DHW heating;
DHW is being prepared in 2 integrated stainless-steel heat
exchangers; a tightly tting separating metal plate increases
the heat pump’s seasonal coe󰀩cient of performance,
a dedicated PV heating element is placed in the lower
tank section; more electric heating elements can be
installed if needed
Working uid
water (DHW heat exchanger)
water; water/glycol mixture (max. 1:1)
or water/glycerine mixture (max. 2:1) (thermal store)
Code
Thermal Store 16177
Insulation 18842
Energy E󰀩ciency Data (as per EC Regulation No. 812/2013)
HSK 750 PV with insulation
Energy e󰀩ciency class N/A
Standing loss 117 W
Storage volume 757 l
Technical Data
Total tank volume 757 l
Fluid volume in tank 725 l
Fluid volume above the separating plate 304 l
Fluid volume below the separating plate 421 l
Upper DHW heat exchanger volume 21 l
Lower DHW heat exchanger volume 11 l
DHW heat exchanger surface area 6 m2
Plocha výměníku TV pod dělicím plechem 3 m2
Max. working temperature in Thermal Store 95 °C
Max. working temperature in DHW HE 95 °C
Max. working pressure in Thermal Store 4 bar
Max. working pressure in DHW HE 10 bar
Tank Materials
Tank material S235JR
DHW heat exchanger material AlSl 316 L
Insulation Materials
Tank perimeter insulation eece
Tank perimeter insulation outer surface hard polystyrene
Top and bottom tank insulation eece
Dimensions, Tipping height, Insulation thickness, Weight
Tank diameter 750 mm
Tank diameter with insulation 950 mm
Tank overall height 1975 mm
Tipping height without insulation 2120 mm
Tank perimeter insulation thickness 100 mm
Bottom insulation thickness 50 mm
Top insulation thickness 120 mm
Empty weight without insulation 170 kg
HSK 750 PV with insulation
HSK 750 PV

7 │
HSK 750 PV Combination Thermal Store
Dimensions
TAPPINGS
pos. description connec-
tion
height
[mm]
Heat sources
B1 Incoming from heat source G 6/4“ F 1010
B2 Return to heat source G 6/4“ F 1155
B3 Incoming from heat source G 6/4“ F 1590
B4 Return to heat source G 6/4“ F 1115
B5 Incoming from heat source G 1“ F/4 1590
B6 Incoming from heat source G 6/4“ F 1635
Heating system
H1 Supply to the heating circuit G 1“ F/4 1055
H2 Returnable from the heating circuit G 1“ F/4 1375
El . heating elements
E1 Electric heating element for DHW heating G 6/4“ F 1175
E2 Electric heating element for space heating G 6/4“ F 1915
E3 Electric heating element for space heating G 6/4“ F 1915
E4 Electric heating element for PV system G 6/4“ F 1310
DHW heating
W1 Cold water G 1“ M/4 1295
W2 Hot water G 1“ M/4 1135
W3 Circulation G 1“ M/4 1135
W4 Hot water G 1“ M/4 1995
Control and safety
C1 Temperature sensor G 1/2“ F 1025
C2 Temperature sensor G 1/2“ F 1615
C3 Temperature sensor G 1/2“ F 1335
C4 Temperature sensor G 1/2“ F 1245
T2Thermometer G 1/2“ F 1655
M2Pressure gauge G 1/2“ F 1510
P2Safety valve G 1/2“ F 1400
Air release
O2Air vent valve G 1/2“ F 1975
Tipping height without insulation 2120 mm

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HSK 1000 PV Combination Thermal Store
Main features
Application accumulation of thermal energy for space and DHW heating
Description
this combination Thermal Store utilizes a heat pump with
PV panels as a heat source for both space and DHW heating;
DHW is being prepared in 2 integrated stainless-steel heat
exchangers; a tightly tting separating metal plate increases
the heat pump’s seasonal coe󰀩cient of performance,
a dedicated PV heating element is placed in the lower
tank section; more electric heating elements can be
installed if needed
Working uid
water (DHW heat exchanger)
water; water/glycol mixture (max. 1:1)
or water/glycerine mixture (max. 2:1) (thermal store)
Code
Thermal Store 16180
Insulation 18845
Energy E󰀩ciency Data (as per EC Regulation No. 812/2013)
HSK 1000 PV with insulation
Energy e󰀩ciency class N/A
Standing loss 129 W
Storage volume 922 l
Technical Data
Total tank volume 922 l
Fluid volume in tank 890 l
Fluid volume above the separating plate 314 l
Fluid volume below the separating plate 576 l
Upper DHW heat exchanger volume 21 l
Lower DHW heat exchanger volume 11 l
DHW heat exchanger surface area 6 m2
Plocha výměníku TV pod dělicím plechem 3 m2
Max. working temperature in Thermal Store 95 °C
Max. working temperature in DHW HE 95 °C
Max. working pressure in Thermal Store 4 bar
Max. working pressure in DHW HE 10 bar
Tank Materials
Tank material S235JR
DHW heat exchanger material AlSl 316 L
Insulation Materials
Tank perimeter insulation eece
Tank perimeter insulation outer surface hard polystyrene
Top and bottom tank insulation eece
Dimensions, Tipping height, Insulation thickness, Weight
Tank diameter 800 mm
Tank diameter with insulation 1000 mm
Tank overall height 2080 mm
Tipping height without insulation 2230 mm
Tank perimeter insulation thickness 100 mm
Bottom insulation thickness 50 mm
Top insulation thickness 120 mm
Empty weight without insulation 192 kg
HSK 1000 PV with insulation
HSK 1000 PV

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HSK 1000 PV Combination Thermal Store
Dimensions
TAPPINGS
pos. description connec-
tion
height
[mm]
Heat sources
B1 Incoming from heat source G 6/4“ F 1205
B2 Return to heat source G 6/4“ F 1200
B3 Incoming from heat source G 6/4“ F 1635
B4 Return to heat source G 6/4“ F 1340
B5 Incoming from heat source G 1“ F/4 1635
B6 Incoming from heat source G 6/4“ F 1787
Heating system
H1 Supply to the heating circuit G 1“ F/4 1280
H2 Returnable from the heating circuit G 1“ F/4 1380
El . heating elements
E1 Electric heating element for DHW heating G 6/4“ F 1365
E2 Electric heating element for space heating G 6/4“ F 1110
E3 Electric heating element for space heating G 6/4“ F 1110
E4 Electric heating element for PV system G 6/4“ F 1300
DHW heating
W1 Cold water G 1“ M/4 1300
W2 Hot water G 1“ M/4 1360
W3 Circulation G 1“ M/4 1360
W4 Hot water G 1“ M/4 1220
Control and safety
C1 Temperature sensor G 1/2“ F 1250
C2 Temperature sensor G 1/2“ F 1740
C3 Temperature sensor G 1/2“ F 1550
C4 Temperature sensor G 1/2“ F 1470
T2Thermometer G 1/2“ F 1700
M2Pressure gauge G 1/2“ F 1510
P2Safety valve G 1/2“ F 1400
Air release
O2Air vent valve G 1/2“ F 2080
Tipping height without insulation 2230 mm

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HSK 1700 PV Combination Thermal Store
Main features
Application accumulation of thermal energy for space and DHW heating
Description
this combination Thermal Store utilizes a heat pump with
PV panels as a heat source for both space and DHW heating;
DHW is being prepared in 2 integrated stainless-steel heat
exchangers; a tightly tting separating metal plate increases
the heat pump’s seasonal coe󰀩cient of performance,
a dedicated PV heating element is placed in the lower
tank section; more electric heating elements can be
installed if needed
Working uid
water (DHW heat exchanger)
water; water/glycol mixture (max. 1:1)
or water/glycerine mixture (max. 2:1) (thermal store)
Code
Thermal Store 16183
Insulation 18848
Energy E󰀩ciency Data (as per EC Regulation No. 812/2013)
HSK 1700 PV with insulation
Energy e󰀩ciency class N/A
Standing loss 175 W
Storage volume 1684 l
Technical Data
Total tank volume 1684 l
Fluid volume in tank 1652 l
Fluid volume above the separating plate 550 l
Fluid volume below the separating plate 1102 l
Upper DHW heat exchanger volume 21 l
Lower DHW heat exchanger volume 11 l
DHW heat exchanger surface area 6 m2
Plocha výměníku TV pod dělicím plechem 3 m2
Max. working temperature in Thermal Store 95 °C
Max. working temperature in DHW HE 95 °C
Max. working pressure in Thermal Store 3 bar
Max. working pressure in DHW HE 10 bar
Tank Materials
Tank material S235JR
DHW heat exchanger material AlSl 316 L
Insulation Materials
Tank perimeter insulation eece
Tank perimeter insulation outer surface hard polystyrene
Top and bottom tank insulation eece
Dimensions, Tipping height, Insulation thickness, Weight
Tank diameter 1100 mm
Tank diameter with insulation 1300 mm
Tank overall height 2075 mm
Tipping height without insulation 2350 mm
Tank perimeter insulation thickness 100 mm
Bottom insulation thickness 50 mm
Top insulation thickness 120 mm
Empty weight without insulation 295 kg
HSK 1700 PV s izolací
HSK 1700 PV

11 │
HSK 1700 PV Combination Thermal Store
Dimensions
TAPPINGS
pos. description connec-
tion
height
[mm]
Heat sources
B1 Incoming from heat source G 6/4“ F 1240
B2 Return to heat source G 6/4“ F 1235
B3 Incoming from heat source G 6/4“ F 1615
B4 Return to heat source G 6/4“ F 1370
B5 Incoming from heat source G 1“ F/4 1615
B6 Incoming from heat source G 6/4“ F 1730
Heating system
H1 Supply to the heating circuit G 1“ F/4 1300
H2 Returnable from the heating circuit G 1“ F/4 1415
El . heating elements
E1 Electric heating element for DHW heating G 6/4“ F 1437
E2 Electric heating element for space heating G 6/4“ F 1170
E3 Electric heating element for space heating G 6/4“ F 1170
E4 Electric heating element for PV system G 6/4“ F 1335
DHW heating
W1 Cold water G 1“ M/4 1335
W2 Hot water G 1“ M/4 1390
W3 Circulation G 1“ M/4 1390
W4 Hot water G 1“ M/4 1240
Control and safety
C1 Temperature sensor G 1/2“ F 1275
C2 Temperature sensor G 1/2“ F 1700
C3 Temperature sensor G 1/2“ F 1505
C4 Temperature sensor G 1/2“ F 1475
T2Thermometer G 1/2“ F 1675
M2Pressure gauge G 1/2“ F 1555
P2Safety valve G 1/2“ F 1445
Air release
O2Air vent valve G 1/2“ F 2075
Tipping height without insulation 2350 mm

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4 - Operation
This tank is designed for heating and storing heating water in household or industrial applications, however always in
closed pressure circuits with forced circulation. Hot water is heated inside the thermal store from several possible heat
sources like various kinds of heating boilers, renewable energy sources or also electric heating elements. A stainless-
-steel tube DHW heat exchanger is heated by heating water inside the thermal store. It connects through 1” threaded
ttings. When hot water is drawn from the outlet point, cold water ows into the immersed heat exchanger and heats
up by the heating water.
The thermal store shall be connected to heat sources through connecting threaded ttings.
Individual connection points are assigned according to the circuits to be connected. There is a wide choice of combi-
nations; the following chapter describes just some examples.
5 - Typical Layout Examples with Thermal Store
Example I.
Heat pump + PV panels + el. heating elements
Example II.
Heat pump + PV panels + gas boiler
BOILER
(gas, electric, light oil fired...)
PV el. heating element
el. heating element for DHW
el. heating elements for space
heating
PV el. heating element
HW CW recirculation
HW CW recirculation
PV panels
PV panels

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6 - Installation and Commissioning
Installation must meet valid rules and may be done only by qualified staff.
Defects caused by improper installation, use or handling are not covered by warranty.
After the tank is installed and connected to an existing heating system, it is recommended to clean the entire heating
system using a suitable cleaning agent, e.g. MR-501/R.
Anti-corrosion protective liquid should be also used, e.g. MR-501/F.
6.1 - Connection to heat sources
Place the tank on the floor, as close to your heat source as possible. Connect the heating circuits to inlets and outlets
respecting the thermal stratification in the tank. Install a drain valve at the lowest point of the tank.
Install an air vent valve at the highest point of the system. Insulate all the connection piping
6.2 - Installation of an el. heating element
The G 6/4“ side tappings are designed to accommodate electric heating rods. They can be connected either directly to
the mains (thermostat-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.
6.3 - Connection to water mains
DHW piping shall be done according to valid rules. Installation of a pressure reducing valve on the immersed tank inlet
is recommended. For water mains pressure above 6 bar a pressure reducing valve is necessary. To prevent water loss,
we recommend installing an expansion vessel at the cold water inlet with a minimum volume of 4% of the total volume
of water in the DHW piping, including heat exchangers, circulation pipes, etc. (usually 8 l). Should the water be too hard,
install a water softener before the tank. In case the water contains mechanical impurities, install a strainer.
6.4 - Commissioning
The tank shall be filled up together with the heating system, respecting valid standards and rules. In order to minimize
corrosion, special additives for heating systems should be used. The quality of heating water depends on the quality of
filling water at commissioning, on the top-up water and on the frequency of topping up. This has a strong influence on the
lifetime of heating systems. Poor quality of heating water may cause problems like corrosion or incrustation, esp. on heat
transfer surfaces.
Quality of DHW shall meet the conditions shown in the Table of limit values for total dissolved solids in hot
water on this page.
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 the proper function of all control and adjustment elements.
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
7 - Installing Insulation on the Tank
Product description
Thermal insulation is a part of thermal stores, preventing heat loss. For easier handling, the insulation shall not be
fitted on this type of thermal store until it reaches its definite place of installation.
Warning
Insulation installation shall be done in two or three persons, depending on its size. The zippered, PVC coated fleece
insulation must not be installed at temperatures below 20 °C. If this cannot 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.
Installing Fleece Insulation
1. Fix the tank following installation instructions.

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2. Wrap the insulation around the tank carefully. Check that the insulation adheres to its body perfectly. This can be
reached by rubbing and patting the insulation by hand from its center evenly in both directions until the insulation
adheres to the tank’s surface completely and no bubbles are left.
3. Use the holes for tappings as a rest during the insulation installation.
4. At least one person presses the insulation to the tank, pulling both ends together. The other person closes theinsu-
lation lock from the side.
5. Put on the upper insulation and cover
6. Push on the covering plastic rosettes depending on the size of tappings, or put on the flange plug(s) with insulation.
7. Finish the tank installation in compliance with the respective instructions and valid standards and rules.
Warranty on insulation
□ Warranty shall become null and void if:
○ the procedure described in the Installation Manual was not respected,
○ 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.

15 │
8 - Maintenance
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.
9 - Disposal
Packaging 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.
Insulation shall be recycled as plastic and the steel vessel as scrap iron.
10 - Warranty
This product is covered by warranty under conditions specified in this Manual and the respective Warranty Certificate.
The Warranty Certificate is an integral part of supply of this Thermal Store.

©2022 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
v1.3-07/2022