INSTRUCTIONS
ST-400DE
INDERECT ENAMEL
BUFFER TANKS
P U
M
P
S
HEAT
TABLE OF CONTENTS
1 PRODUCT SPECIFICATIONS ........................................................................................................................ 3
1.1 FUNCTION DESCRIPTION ................................................................................................................... 3
1.2 CONSTRUCTION AND BASIC DIMENSIONS OF THE TANK .................................................................. 3
1.2.1 PRODUCT DESCRIPTION............................................................................................................. 3
1.2.2 SPECIFICATIONS ......................................................................................................................... 4
1.2.3 PRESSURE LOSS .......................................................................................................................... 6
2 OPERATING AND INSTALLATION INFORMATION ...................................................................................... 6
2.1 COMMISSIONING OF THE TANK ........................................................................................................ 6
2.2 CONNECTING THE TANK TO THE DHW DISTRIBUTION SYSTEM ........................................................ 7
2.3 PLUMBING ......................................................................................................................................... 8
2.4 CONNECTING THE TANK TO THE HEATING SYSTEM .......................................................................... 9
2.5 CLEANING THE TANK AND REPLACING THE ANODE ROD................................................................ 10
2.6 SPARE PARTS.................................................................................................................................... 11
3 IMPORTANT CAUTIONS ........................................................................................................................... 11
3.1 IMPORTANT CAUTIONS ................................................................................................................... 11
3.2 INSTALLATION REGULATIONS.......................................................................................................... 11
3.3 DISPOSAL OF THE PACKING MATERIAL AND NON-FUNCTIONING PRODUCT ................................ 11
2
PLEASE READ THIS MANUAL CAREFULLY BEFORE
INSTALLING THE WATER TANK!
Dear Customer,
SINCLAIR CORPORATION, Ltd.thanks you for your decision to use a product of our brand. Through these
instructions, we will familiarize you with the use, design, maintenance and other information about electric
water tanks.
This product is not intended to be operated by
a) persons (including children) with reduced physical, sensory or mental capabilities, or
b) persons with insufficient knowledge and experience, unless being supervised by a responsible
person or have not been properly trained.
The manufacturer reserves the right to modify the product. This product is designed for permanent contact
with drinking water.
We recommend using this product in an indoor environment with air temperatures from +2 °C to +45 °C
and max relative humidity of 80%.
Made in the Czech Republic.
The meaning of the pictograms used in the manual
Important information for the user of the tank.
A manufacturer's recommendation to ensure trouble-free operation and long life of the
product.
ATTENTION!
Important notice to be followed.
3
1 PRODUCT SPECIFICATIONS
1.1 FUNCTION DESCRIPTION
The indirectly heated stationary tank is designed to prepare DHW when connected to the heat pump.
Additional heating can be done by electric heating element TJ 6/4".
1.2 CONSTRUCTION AND BASIC DIMENSIONS OF THE TANK
1.2.1 PRODUCT DESCRIPTION
The tank is welded from a steel sheet and protected by a hot water resistant enamel. As additional
protection against corrosion, 2 magnesium anode rods are installed in the top part and in the side flange of
the tank. These rods change the electrical potential inside the tank and thus reduce the effects of
corrosion. One heat exchanger made of steel tube helical coil with an outside enamel coating is welded
inside of the tank. There are also connections for hot, cold and circulating water and a thermostat socket.
The tube heat exchanger is intended only for the heating circuit.
On the tank side, there is a cleaning and inspection opening with flange cover (flange inside diameter is
110 mm) secured by eight M8 bolts with 150 mm spacings. The tank has also a G 1½" opening for screwing
an auxiliary heating element. This option is used to heat up the water in the upper part of the tank to the
required temperature when the tank is connected to a heat pump system. The tank is insulated with 50mm
or 60mm polyurethane CFC-free foam; tank case is made of plastic.
4
1.2.2 SPECIFICATIONS
TYPE
ST-400DE
VOLUME l
352
HEIGHT mm
1644
DIAMETER mm
700
MAX WEIGHT WITHOUT
WATER
kg
190
MAX OPERATING
OVERPRESSURE IN THE TANK
MPa
1
MAX OPERATING
OVERPRESSURE IN THE
EXCHANGER
MPa
1
MAX HEATING WATER
TEMPERATURE
°C
110
MAX OPERATING
TEMPERATURE IN THE TANK
°C
80
EXCHANGER HEATING
SURFACE
m
2
5.2
EXCHANGER VOLUME l
32
ENERGY CLASS
C
STATIC LOSS W
90
5
ST-400DE
ST-400DE
A
1644
B
812
C
852
D
700
E
55
F
1521
G
843
I
1138
J
288
L
228
M
1081
P
592
R
1237
1" outer
3/4" inner
5/4" inner
1/2" inner
6/4" inner
6
0
50
100
150
200
250
300
350
400
0 0,5 1 1,5 2 2,5 3 3,5 4 4,5 5
mbar
m3/h
1.2.3 PRESSURE LOSS
2 OPERATING AND INSTALLATION INFORMATION
2.1 COMMISSIONING OF THE TANK
After connecting the tank to the water distribution system, hot water heating system, and eventually to the
electric network, and after checking the safety valve (according to the instructions attached to the valve),
the tank may be put into operation.
Procedure:
a) Check the plumbing and electrical installation including the connection to the hot water heating
system. Check the proper placement of both operational and safety thermostat sensors. The
sensors must be inserted all the way in the socket; first the operational thermostat and then the
safety thermostat.
b) Open the hot water valve on the mixing battery.
c) Open the valve on the cold water inlet to the tank.
d) When the water starts to flow through the hot water valve, the tank is filled up and the valve
should be closed.
e) Should a leakage (of the flange cover) occur, we recommend to tighten the bolts of the flange
cover.
f) When heating the sanitary water using the thermal energy from the hot water heating system,
switch off the electricity and open the valves on the inlet and outlet of heating water, eventually
bleed the heat exchanger. When commencing operation, flush the tank until the cloudiness
disappears.
g) Fill properly the warranty card.
7
2.2 CONNECTING THE TANK TO THE DHW DISTRIBUTION SYSTEM
Fig. 1
Heaters with a capacity above 200 litres must be equipped with a combined temperature and pressure
(T&P) relief valve according to ČSN EN 1490 on the hot water outlet, or with a temperature relief valve
equipped with a water temperature sensor located in the heater, or with another safety valve DN 20 with
an opening overpressure that is equal to max operating overpressure of the heater tank. This safety valve
cannot be used as a substitution of the safety valve at the cold water inlet. No stop/check valve or filter can
be placed between the safety valve and the heater.
The cold water inlet of the tank must be equipped with a T-fitting with a drain valve to drain
the water from the tank if needed.
Each heater that can be individually blocked must be equipped with a stop valve, test valve or
a plug to test the function of the check valve, check valve and safety valve at the cold water
inlet. Heaters with a capacity above 200 litres must also be equipped with a pressure gauge.
The test valve, check valve, safety valve and pressure gauge must also be installed at the hot
water inlet.
DHW
Sensor socket
Sensor socket
Water heater
Circulation
Pump
Expansion tank
Heating water
Heating water
Heat pump
Cold water
Return water
Return water
Screwed
heating
element
● The use of an expansion tank is not necessary for proper
connection, but only a possible solution variant.
U – Stop valve
P1 – Safety walve with check valve
P2 – Safaty valve for heating circuit
V – Drain valve
M – Manometer
T – 3-way valve
O – Bleed valve
ZK – Test valve for check of the tightness of
the check valve
8
2.3 PLUMBING
Pressure water is connected to the 3/4" threaded pipes at the bottom of the tank. Blue - cold
water inlet, red – hot water outlet. To disconnect the tank in case of need, it is necessary to
install a Js 3/4" screw fittings at the water inlets and outlets. The safety valve is mounted on
the cold water inlet marked with a blue ring.
Each pressure hot water tank must have a membrane spring-loaded safety valve. Nominal
clearance of safety valves is determined according to the applicable standard. The tanks are
not equipped with a safety valve. The safety valve must be easily accessible and as close to the
tank as possible. The inlet pipe must have at least the same clearance as the safety valve. The
safety valve must be placed high enough to ensure the dripping water drain by gravity. We
recommend mounting the safety valve onto a branch pipe. This allows you to easier replace
the valve without having to drain the water from the tank. Safety valves with fixed pressure set
by the manufacturer are used for the assembly. The opening pressure of the safety valve must
be identical to the maximum allowed tank pressure, and at least 20% higher than the
maximum pressure in the water distribution system (water main) (Table 1). If the pressure in
the water distribution system exceeds this value, a reduction valve must be included in the
system. No stop valve can be put between the tank and safety valve. Follow the installation
manual provided by the manufacturer of the safety valve.
The safety valve must be checked each time before putting it into operation. The check is
performed by the manual moving of the membrane away from its seat by turning the knob of
the releasing device always in the arrow direction. After being turned, the knob must click back
into a notch. The proper function of the releasing device results in water draining through the
safety valve drain pipe. If the releasing device functions properly, water runs off through the
safety valve drain pipe.
In normal operation, it is necessary to perform this check at least once a month and each time,
when the tank was shut down for more than 5 days. Water may be dripping from the safety
valve drain pipe; the pipe must be opened into the air, pointed down and placed in an
environment where the temperature does not drop below the freezing point. When draining
the tank, use the recommended drain valve. First, close water inlet of the tank.
You can find the required pressures in the following table (Table 1). For proper operation of the safety
valve, the check valve must be mounted on the inlet pipe to prevent spontaneous draining of the tank and
penetration of hot water back into the water distribution system. We recommend using the shortest
possible distribution of hot water from the tank to reducing heat loss. At least one detachable joint must be
installed between the tank and each supply pipe. Appropriate pipes and fittings must be used with
sufficiently high maximal temperature and pressure values.
9
Table 1
2.4 CONNECTING THE TANK TO THE HEATING SYSTEM
The tank should be placed on the ground next to a heating source, or in its vicinity. The heating circuit
should be connected to the marked inlets and outlets of the heater exchanger, and the bleeding valve
should be mounted at the highest point. It is necessary to install a filter into the heating circuit to protect
the pumps, three-way valve, check valves and heat exchanger from clogging. We recommend flushing the
heating circuit before installation. All interconnecting piping should be properly thermally insulated. If the
system will work with the priority heating of DHW using a three-way valve, follow the installation
instructions provided by the manufacturer of the three-way valve.
Example of a group of tanks connected using the Tichelmann method for balanced consumption of hot
water from all tanks
Fig. 2
OPENING PRESSURE
OF THE SAFETY
VALVE [MPa]
ALLOWED
OPERATING
OVERPRESSURE OF
THE WATER TANK
[MPa]
MAX PRESSURE IN
THE COLD WATER
PIPING [MPa]
0.6 0.6 Up to 0.48
0.7 0.7 Up to 0.56
1 1 Up to 0.8
DHW
HeW inlet
Thermostat socket
HeW outlet
CW
DHW
HeW inlet
HeW outlet
CW
DHW
HeW inlet
HeW outlet
CW
HeW input
HeW output
DHW output
CW input
HeW – Heating water DHW – Domestic hot water
CW – Cold water 1 – Check valve
C – circulation 2 – Pump
10
2.5 CLEANING THE TANK AND REPLACING THE ANODE ROD
Repeated heating of water causes a limescale deposition on the enamelled tank surface and mainly on the
flange cover. Deposition depends on the hardness of heated water, its temperature, and the amount of hot
water consumed.
We recommend to check the tank and the anode rod after two years of operation and
remove the limescale or replace the anode rod if needed.
The expected lifetime of the anode rod is two years of operation; however, it varies according to the
hardness and chemical composition of the water at the place of use. Based on this inspection, it is possible
to schedule the next replacement of the anode rod. Call a service company to clean the tank or replace the
anode rod. When draining water from the tank, the hot water valve of the mixing battery must be opened
to avoid underpressure in the tank, which would prevent water from draining.
To prevent the growth of bacteria (e.g. Legionella pneumophila) in the tank heaters, it is
recommended, if inevitable, to periodically and temporarily increase the temperature of the
DHW to at least 70 °C. Another way to disinfect DHW may also be applied.
PROCEDURE FOR REPLACING THE ANODE ROD IN THE UPPER PART OF THE TANK
1. Turn off the control voltage to the tank
2. Drain water from 1/5 of the tank.
PROCEDURE: Close the water inlet valve of the tank.
Open the hot water valve of the mixing battery.
Open the drain valve of the tank.
3. The anode is screwed under the plastic cover in the upper lid of the tank.
4. Unscrew the anode with a suitable wrench.
5. Pull out the anode and reverse the procedure to install the new anode.
6. When mounting, make sure the earthing cable (300 l) is connected correctly; it is a condition for
proper anode function.
7. Fill the water tank with water.
PROCEDURE FOR REPLACING THE ANODE ROD IN THE SIDE FLANGE
1. Turn off the control voltage to the tank
2. Drain water from the tank.
PROCEDURE: Close the water inlet valve of the tank.
Open the hot water valve of the mixing battery.
Open the drain valve of the tank.
3. One anode is screwed under the plastic cover in the upper lid of the tank and the second anode is
screwed on the side flange.
4. Unscrew the anode with a suitable wrench.
5. Pull out the anode and reverse the procedure to install the new anode.
6. Fill the water tank with water.
11
2.6 SPARE PARTS
- Magnesium anode
- Contact thermometer
Give part name, type, and type number from the tank label when ordering spare parts.
3 IMPORTANT CAUTIONS
3.1 IMPORTANT CAUTIONS
The warranty card is invalid without certification from a professional firm, which confirms the
electrical installation and plumbing.
Check the protective Mg anode regularly and replace it if needed.
No stop valve can be put between the heater and the safety valve.
All hot water outputs must be fitted with a mixing battery.
Before filling the tank with water for the first time, it is recommended to tighten the nuts on
the flange connection of the tank.
3.2 INSTALLATION REGULATIONS
Both electric and water installations must follow and meet the requirements and regulations in
the country of use.
3.3 DISPOSAL OF THE PACKING MATERIAL AND
NON-FUNCTIONING PRODUCT
A service fee for providing return and recovery of packaging material has been
paid for the packaging in which the product was delivered. The service fee was
paid to EKO-KOM a.s. pursuant to Act no. 477/2001 Coll. as amended. Client
number of the company is F06020274. Dispose of packaging materials at a public
waste disposal site. Uninstall the discarded and unserviceable product after the
end of the operation and transport it to the waste recycling centre (collecting
yard), or contact the manufacturer.
6-9-2018
NOTE CONCERNING PROTECTION OF
ENVIRONMENT
This product must not be disposed of via normal household waste after its service life, but must be
taken to a collection station for the recycling of electrical and electronic devices. The symbol on the
product, the operating instructions or the packaging indicate such disposal procedures. The materials
are recyclable in accordance with their respective symbols. By means of re-use, material recycling or
any other form of recycling old appliances you are making an important contribution to the protection
of our environment. Please ask your local council where your nearest disposal station is located.
In case of quality problem or other please contact your local supplier or authorized service center.
Emergency number: 112
PRODUCER
SINCLAIR CORPORATION Ltd.
1-4 Argyll St.
London W1F 7LD
Great Britain
www.sinclair-world.com
This product was manufactured in China (Made in China).
REPRESENTATIVE
SINCLAIR Global Group s.r.o.
Purkynova 45
612 00 Brno
Czech Republic
TECHNICAL SUPPORT
SINCLAIR Global Group s.r.o.
Purkynova 45
612 00 Brno
Czech Republic
Tel.: +420 800 100 285
Fax: +420 541 590 124
www.sinclair-solutions.com
info@sinclair-solutions.com
/