Regulus THERMAL STORE HSK 400 P+ User manual

www.regulus.eu
HSK 400 P+
HSK 400 P+
EN
Installation and Operation Instructions
THERMAL STORE
with stainless-steel DHW tube heat exchanger
HSK 400 P+

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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 ................................................................................................................... 4
4 Operation ........................................................................................................................................................ 5
5 Thermal Store Connection to a Heating System ......................................................................................... 6
6 Installation and Commissioning ................................................................................................................... 8
6.1 Connection to heat sources ............................................................................................................... 8
6.2 Installation of an el. heating element ................................................................................................. 8
6.3 Connection to water mains ................................................................................................................ 8
6.4 Commissioning .................................................................................................................................. 8
7 Installing Insulation on the Tank .................................................................................................................. 9
8 Maintenance ................................................................................................................................................... 11
9 Disposal .......................................................................................................................................................... 11
10 Warranty ......................................................................................................................................................... 11

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1 - Description
HSK 400 P+ 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 better thermal stratification of heating water, the tank is divided by a separating
metal sheet.
1.1 - Models
One model of 408 litres total volume with stainless-steel tube DHW heat exchanger.
1.2 - Tank protectione
The thermal store has no inner surface finish, 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. The insulation is 100 mm thick, with a hard polystyrene
surface. 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 designed for continuous DHW heating.
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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3 - Technical Data and Dimensions
Code
Thermal Store 19607
Insulation 19609
Energy E󰀩ciency Data (as per EC Regulation No. 812/2013)
HSK 400 P+ with insulation
Energy e󰀩ciency class C
Standing loss 81 W
Storage volume 408 l
Technical Data
Total tank volume 408 l
Total uid volume in tank 387 l
Fluid volume above the separating plate 220 l
Fluid volume below the separating plate 167 l
Volume of DHW heat exchanger above the
separating plate 21 l
Surface area of DHW heat exchanger above
the separating plate 6 m2
Max. working temperature in tank 95 °C
Max. working temperature in DHW heat exchanger 95 °C
Max. working pressure in tank 4 bar
Max. working pressure in DHW heat exchanger 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 550 mm
Tank diameter with insulation 750 mm
Tank overall height 1905 mm
Tipping height without insulation 1940 mm
Tank perimeter insulation thickness 100 mm
Bottom insulation thickness 50 mm
Top insulation thickness 100 mm
Empty weight without insulation 91 kg
HSK 400 P+ with insulation
HSK 400 P+
Accessories
El. heating element (models) ETT-A, C, D, F, M, P
Heating elem. max. length 3x 555 mm
Volume of supplied DHW (heated from 10 °C to 40 °C)
Heated volume entire entire above metal
sheet entire entire above metal
sheet entire
Temperature in tank 50 °C 50 °C 50 °C 60 °C 60 °C 60 °C 80 °C
Backup heater 10 kW none 10 kW 10 kW none 10 kW none
Flow rate [l/min] 812 20 812 20 812 20 812 20 812 20 812 20 812 20
Hot water volume [l] 363 237 120 222 187 101 195 132 106 534 359 268 321 290 266 253 235 208 567 528 516

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4 - Operation
This tank is designed to accumulate thermal energy for heating. Heating water transfers the accumulated heat to
DHW via an integrated heat exchanger. Hot water is therefore heated in a continuous manner.
Dimensions
CONNECTIONS
pos. description
connection height [mm]
Heat sources
B1 Incoming from heat source G 1" F/4 1780
B2 Return to heat source G 1" F/4 1210
B3 Incoming from heat source G 1" F/4 1420
B4 Return to heat source G 1" F/4 1880
B5 Incoming from heat source G 1" F/4 1420
B6 Return to heat source G 6/4" F 1880
Heating system
H1 Flow to heating system G 1" F/4 1780
H2 Return from heating system G 1" F/4 1210
El. heating elements
E1
Electric heating element for DHW heating G 6/4" F 1880
E2
Electric heating element for space heating G 6/4" F 1720
E3
Electric heating element for PV system G 6/4" F 1210
DHW heating
W1 Cold water G 1" M41975
W2 Hot water G 1" M41025
Control and safety
C1 Temperature sensor G 1/2" F 1750
C2 Temperature sensor G 1/2" F 1510
C3 Temperature sensor G 1/2" F 1190
C4 Temperature sensor G 1/2" F 1050
T2Thermometer G 1/2" F 1630
M2Pressure gauge G 1/2" F 1510
P2Safety valve G 1/2" F 1400
Air release
O2Air vent valve G 1/2" F 1905
Tipping height without insulation 1905 mm

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5 - Thermal Store Connection to a Heating System
BRAIDED HOSE
COMPENSATOR
Example I.
Heat pump + el. heating element
+ fireplace + PV possible
KEY 1 – Regulus heat pump (RTC, CTC) 2 – pump station for heat pump – CSE TC W iPWM MFB 3 – heating system expansion vessel 4 – electric heating elements for heating system (or PV) 5 – HSK 400 P+ thermal store 6 – RGMAT E load unit 7 – replace insert (stove) with hot water heat exchanger 8 – pump station for heating system2 - CSE2 MIX 9 – pump station for heating system1 - CSE2 MIX 10 – collector/manifold, HV 60/125-2 11 – pump station for DHW recirculation – CSE TVMIX ZV 12 – safety kit for HW storage tank 13 – DHW expansion vessel 14 – el. heating element for DHW 15 – zone valves for DHW heating from HP SV – cold water TV – hot water CV – hot water recirculation ÚT – central heating (heating system) 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 PV-ÚT – safety valve for heating system MFB – Magnet Filterball F – lter BVTS – one-way thermal relief valve

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Example II.
Heat pump + gas-fired boiler + fireplace + PV possible
BRAIDED HOSE
COMPENSATOR
KEY 1 – Regulus heat pump (RTC, CTC) 2 – pump station for heat pump – CSE TC W iPWM MFB 3 – heating system expansion vessel 4 – electric heating element powered by PV 5 – HSK 400 P+ thermal store 6 – RGMAT E load unit 7 – replace insert (stove) with hot water heat exchanger 8 – pump station for heating system2 - CSE2 MIX 9 – pump station for heating system1 - CSE2 MIX 10 – collector/manifold, HV 60/125-2 11 – boiler (natural gas, electric...) 12 – pump station for DHW recirculation – CSE TVMIX ZV 13 – safety kit for HW storage tank 14 – DHW expansion vessel 15 – zone valves for DHW heating from HP SV – cold water TV – hot water CV – hot water recirculation ÚT – central heating (heating system) 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 PV-ÚT – safety valve for heating system MFB – Magnet Filterball F – lter BVTS – one-way thermal relief valve

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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. BP 400.
Anti-corrosion protective liquid should be also used, e.g. BP 100 Plus.
6.1 - Connection to heat sources
Place the tank on the floor, as close to your heat source (heat pump, boiler) as possible. Fit the insulation, cf. Installing
Insulation on the tank. 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 thermal store can be equipped with el. heating elements. They can be power-supplied either directly (thermostat-
-equipped elements), or via a controller for the entire heating system.
Warning: Electric heating elements shall be protected by a safety thermostat.
The electric heating element shall be wired by a professionally qualified person only.
6.3 - Connection to water mains
DHW piping shall be done according to valid rules. Connections to the tank, including placing the components, is shown
in the diagrams of the recommended connection in Chap. 5. 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
Ground the tank before 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

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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 the tank until it reaches its definite place of installation.
Warning
Insulation installation shall be done in two or three persons, depending on its size.
Do not use any tools for installation.
Keep away from open fire.
Installing Insulation
1. Fix the tank following installation instructions.
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 connections 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
the insulation lock from the side.
5. Put on the upper insulation and cover
6. Push on the covering plastic rosettes depending on the size of connections.
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.

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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.

©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
v1.0-04/2023