thermital THE/COMBI3 430, THE/COMBI3 750, THE/COMBI3 550, THE/COMBI3 1000 Installation And Maintenance Manual
THE/COMBI3
INSTALLATION
AND MAINTENANCE MANUAL
2
ENGLISH
RANGE
MODEL CODE
THE/COMBI3 430 20023611
THE/COMBI3 550 20023612
THE/COMBI3 750 20023613
THE/COMBI3 1000 20023614
3
ENGLISH
Dear Installer,
Thank you for choosing a THERMITAL THE/COMBI3 combination storage cylinder, a modern, quality
product.
This instruction manual contains important instructions and precautions that must be observed to
ensure the trouble-free installation and efficient functioning of your THERMITAL THE/COMBI3 com-
bination storage cylinder.
Please accept our renewed thanks for your purchase.
Thermital
Ask your Technical Assistance Centre for further information on how to get the best from your new combination storage
cylinder.
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CONTENTS
CONTENTS
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require cau-
tion and adequate preparation
a STOP! = Identifies actions that you MUST NOT
do
This manual, Code 20024133 - Rev. 8 (05/17) is made up
of 28 pages.
GENERAL 5
Safety precautions .......................................................5
General safety information ...........................................5
Product description......................................................6
Identification .................................................................6
Design ..........................................................................7
Technical specifications ...............................................8
Accessories ...............................................................12
Water circuit ...............................................................13
INSTALLATION 14
Unpacking the product ..............................................14
Dimensions ................................................................14
Handling .....................................................................15
Place of installation ....................................................17
Installation in older systems and systems requiring
modernisation ............................................................17
Water connections .....................................................18
Location of probes .....................................................21
Preparing for initial start-up .......................................21
TECHNICAL ASSISTANCE 21
Initial start-up .............................................................22
Checks during and after initial start-up .....................22
Preparing for extended periods of disuse .................23
Maintenance ..............................................................24
Cleaning .....................................................................24
Troubleshooting ..........................................................25
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GENERAL
SAFETY PRECAUTIONS
a
Do not allow children or infirm persons to operate
the combination storage cylinder unsupervised.
a
Do not touch the combination storage cylinder when
barefoot or wet.
a
Never clean or service the combination storage
cylinder without first disconnecting it from the mains
electricity supply by turning the main power switch
and the control panel switch OFF.
a
Do not interfere with any control devices without
specific authorisation and instructions from the
manufacturer.
The operation of any appliance that uses electrical power and water demands that a number of fundamental safety
precautions be respected. In particular:
a
Do not expose the combination storage cylinder to
the elements. It is not designed for use outdoors.
a
Do not leave packaging material within the reach of
children, since it can become a potential hazard.
a
If the pressure in the solar heating circuit drops, do
not top up with water alone, since this increases the
risk of damage from freezing.
a
Do not use connections or safety devices or fittings
(expansion vessels, pipes, insulation) that are not
specifically designed and tested for use in solar
heating installations.
b As soon as you open the packaging, check imme-
diately that the contents are all present and undamaged. Contact the THERMITAL reseller from whom
you purchased the product if you notice any problems.
b This THERMITAL THE/COMBI3 combination stor-
age cylinder must be installed by a qualified installer. On completion of the installation, the installer
must issue the owner with a declaration of conformity confirming that the installation has been completed to the highest standards in compliance with
the instructions provided by THERMITAL in this
instruction manual, and that it conforms to all applicable laws and standards.
b This THERMITAL THE/COMBI3 combination stor-
age heater must only be used for the purpose specified by THERMITAL and for which it is designed.
The manufacturer declines all responsibility, contractual or other, for damage to property or injury to
persons or animals caused by improper installation,
adjustment, maintenance or use.
b If you notice any water leaking from the cylinder,
disconnect it immediately from the mains electricity supply, shut off the water supply, and notify your
THERMITAL Technical Assistance Centre or a qualified technician immediately.
b This combination storage cylinder must be serviced
at least once a year.
b If the combination storage cylinder is not going to
be used for an extended period of time, prepare it
for shut-down as follows:
- Turn the system’s main power switch OFF
- Drain the solar water circuit
- Close the fuel cock and heating water cock
- Drain the central heating circuit and domestic hot
water circuit if there is any risk of freezing.
b Anti-freeze (propylene glycol) is available separate-
ly and must be mixed with water in a percentage
varying from 30% to 50%.
b This instruction manual is an integral part of the
appliance. It must be kept safe and must ALWAYS
accompany the appliance, even if it is sold to
another owner or transferred to another user or
to another installation. If you damage or lose this
manual, order a replacement immediately from your
local THERMITAL Technical Assistance Centre.
GENERAL SAFETY INFORMATION
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GENERAL
PRODUCT DESCRIPTION
THE/COMBI3 triple coil combination storage cylinders
come in the form of an inertial (buffer) storage cylinder
with three internal coils. The bottom coil receives heat
from the solar circuit while the top coil receives heat from
the boiler. A third coil in stainless steel produces domestic hot water.
The most important technical features of these combination storage cylinders are:
- The cylinder and coils are specially designed and
shaped for optimum performance in terms of stratification, heat exchange and replenishment times.
- The stainless steel, rapid heat exchange coil for domestic hot water production is bacteriologically inert and
guarantees maximum hygiene and reduced lime scale
deposits.
- Water fittings are available at different heights, permitting different boilers to be used without reducing the
stratification effect.
- CFC-free polyurethane insulation and an elegant external casing reduce heat loss and improve efficiency.
- Excellent flexibility permits use in both high and low
temperature systems.
- Dimensions are extremely compact thanks to the clever
combination of an inertial storage cylinder and domestic hot water coil.
THE/COMBI3 triple coil combination storage cylinders
can be connected to a special solar controller and can be
integrated in solar heating systems in which THERMITAL
boilers or water heaters serve as auxiliary heat generators.
b If these plates or any other means of clearly identify-
ing the product are defaced, removed or lost, proper
installation and servicing may be rendered difficult.
– Data plate
This lists the technical specifications and
performance of the product.
– Product identification plate
This states the name of the product.
– Serial number plate
This specifies the serial number, model,
consumption and capacity.
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
THERMITAL THE/COMBI3 combination storage cylinders are identified by three plates:
IDENTIFICATION
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GENERAL
DESIGN
1
2
5
7
10
6
12
11
9
3
4
8
13
14
7
15
16
18
20
21
22
23
17
19
1 - Insulation
2 - Domestic cold water inlet
3 - Inertial storage cylinder
4 - Bottom coil
5 - Temperature sensor socket
6 - Sleeve for electric heating element (not sup-
plied)
7 - Boiler temperature sensor socket
8 - Top coil
9 - Storage cylinder temperature gauge
10 - Domestic hot water outlet
11 - DHW coil
12 - Vent valve fitting
13 - Inlet from boiler
14 - Inlet from 2nd boiler
15 - Central heating outlet
16 - Return to 2nd boiler
17 - Inlet from solar collector
18 - 50° C water return
19 - Return to solar collector
20 - Inlet from condensing boiler / 50° C
water return
21 -
Solar controller temperature sensor
socket
22 - Return to condensing boiler / Filling
23 - 30° C water return / Drain
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GENERAL
TECHNICAL SPECIFICATIONS
(*) With ∆T = 35°C and primary temperature = 80-60°C.
Performance achieved with heat generator of suitable power, adjusted for a flow rate of 3000 l/h.
DESCRIPTION
THE/COMBI3
430 550 750 1000
Type of inertial storage cylinder Non vitrified
Inertial storage cylinder layout Vertical
Heat exchanger layout Vertical
Primary coils Smooth steel pipe
DHW coil Corrugated pipe in AISI 316 L stainless steel
Inertial storage cylinder capacity 407 520 732 898 l
Diameter with insulation 810 810 1000 1000 mm
Diameter without insulation 650 650 790 790 mm
Height 1650 2000 1855 2180 mm
Insulation thickness 70 90 mm
Temperature sensor socket diameter (boiler and solar system)
16 Ø mm
Temperature sensor socket diameter 8 Ø mm
Temperature gauge sensor socket diameter 1/2" M Ø
Top primary coil water capacity 7,1 8,0 10,0 10,0 l
Bottom primary coil water capacity 11,0 12,8 17,4 19,8 l
DHW coil water capacity 23,6 23,6 30,4 30,4 l
Top primary coil heat exchange surface area 1,17 1,31 1,72 1,72 m
2
Bottom primary coil heat exchange surface area 1,80 2,10 2,90 3,34 m
2
DHW coil heat exchange surface area 4,5 4,5 5,8 5,8 m
2
Power absorbed by top primary coil (*) 25,0 26,0 30,0 30,0 kW
Maximum working pressure of inertial storage cylinder 3 5 bar
Maximum working temperature of inertial storage cylinder
95 °C
Maximum working pressure of primary coils 10 bar
Maximum working pressure of DHW coil 6 bar
Maximum working temperature of primary coils 95 °C
Maximum working temperature of DHW coil 90 °C
Recommended surface area of solar panel 6 8 12 14 m
2
Net weight 168 195 239 269 kg
Gross weight (with packaging) 189 215,5 254 284,4 kg
Heat loss according to EN 12897:2006 at ∆T=45 °C 60 68 156 175 W
Energy efficiency class B B D D
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GENERAL
CONFIGURATION A
THE/COMBI3
Boiler
CONFIGURATION B
THE/COMBI3
Boiler
Descrizione
THE/COMBI3
430 550 750 1000
Domestic hot water
production (*)
3050 3300 3150 3200 l/h
Domestic hot water
production (**)
1970 2115 1980 2250 l/h
Water draw in 10 minutes with mean ∆T of 35° and
primary storage tank at:
90°C 600 670 800 800 l
80°C 425 470 670 670 l
70°C 370 400 570 570 l
60°C 220 280 285 285 l
Useful non-solar
volume (Vbu)
320 430 565 705 l
(*) With ∆T = 35°C and primary temperature = 80°C.
Performance achieved with boiler of suitable power
configured for a flow rate of 3000 l/h.
(**) With ∆T = 35°C and primary temperature = 80°C.
Performance achieved with boiler of suitable power
configured for a flow rate of 1500 l/h.
Descrizione
THE/COMBI3
430 550 750 1000
Domestic hot water
production (*)
2300 2400 2600 2650 l/h
Domestic hot water
production (**)
1650 1750 1900 1950 l/h
Water draw in 10 minutes with mean ∆T of 35° and
primary storage tank at:
90°C 350 400 420 560 l
80°C 260 310 350 470 l
70°C 200 220 285 350 l
60°C 130 160 200 240 l
Useful non-solar
volume (Vbu)
190 235 325 435 l
(*) With ∆T = 35°C and primary temperature = 80°C.
Performance achieved with boiler of suitable power
configured for a flow rate of 3000 l/h.
(**) With ∆T = 35°C and primary temperature = 80°C.
Performance achieved with boiler of suitable power
configured for a flow rate of 1500 l/h.
Performance of THE/COMBI3 combination storage cylinder with boiler connected in:
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