Riello KOMBI 800 User manual

cod. 20145353 rev. 1 05/2018
KOMBI
EN INSTALLATION, OPERATION AND MAINTENANCE MANUAL

2
RANGE
MODEL CODE
KOMBI 800 20145308
KOMBI 1000 20145313

3
Dear Installer,
Thank you for choosing a r KOMBI,combination storage cylinder. You have purchased a modern,
quality product that is designed to give dependable and safe service and to provide comfort in the
home for many years to come. Arrange for your combination storage cylinder to be serviced regularly
by an authorised rTechnical Assistance Centre. Their personnel are specially trained to keep
your storage cylinder efficient and cheap to run. Technical Assistance Centres also stock any original
spare parts that might be required.
This instruction manual contains important instructions and precautions that must be observed to
ensure the trouble-free installation and efficient functioning of your r KOMBI combination stor-
age cylinder.
Please accept our renewed thanks for your purchase.
Riello S.p.A.
Ask your Technical Assistance Centre for further information on how to get the best from your new combination storage
cylinder.

CONTENTS
4
CONTENTS
The following symbols are used in this manual:
b CAUTION! = Indicates actions that require cau-
tion and adequate preparation
aSTOP! = Identifies actions that you MUST NOT
do
This manual, Code 20145353 - Rev. 1 (05/2018) is made
up of 24 pages.
GENERAL
Safety precautions page 5
General safety information “ 5
Product description “ 6
Identification “ 6
Design “ 7
Technical specifications “ 8
Accessories “ 9
Water circuit “ 10
INSTALLATION
Unpacking the product page 11
Dimensions and weight “ 11
Handling “ 12
Assembly of the insulation and the lining “ 13
Place of installation “ 14
Installation in older systems and systems
requiring modernisation
“ 14
Water connections “ 15
Location of probes “ 17
TECHNICAL ASSISTANCE
Preparing for initial start-up page 17
Initial start-up “ 18
Checks during and after initial start-up “ 18
Preparing for extended periods of disuse “ 19
Maintenance “ 20
Cleaning and removing internal components “ 20
Troubleshooting “ 21

GENERAL
5
SAFETY PRECAUTIONS
b As soon as you open the packaging, check imme-
diately that the contents are all present and undam-
aged. Contact the r reseller from whom you
purchased the product if you notice any problems.
b This r KOMBI combination storage cylinder
must be installed by a qualified installer. On com-
pletion of the installation, the installer must issue the
owner with a declaration of conformity confirming
that the installation has been completed to the high-
est standards in compliance with the instructions
provided by r in this instruction manual, and
that it conforms to all applicable laws and stand-
ards.
b This r KOMBI combination storage heater must
only be used for the purpose specified by r 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 electric-
ity supply, shut off the water supply, and notify your
r Technical Assistance Centre or a qualified
technician immediately.
b This combination storage cylinder must be serviced
at least once a year.
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.
a Never pull, disconnect, or twist the electrical cables
coming from the appliance even if it is disconnected
from the mains electricity supply.
The operation of any appliance that uses electrical power and water demands that a number of fundamental safety
precautions be respected. In particular:
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% as instructed in the rel-
evant rdi messa in servizio e manutenzione.
b Only fill the solar heating system with water and
glycol premixed in the percentages specified in the
r installation and maintenance manual.
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 anoth-
er owner or transferred to another user or to another
installation. If you damage or lose this manual, order
a replacement immediately from your local r
Technical Assistance Centre.
GENERAL SAFETY INFORMATION
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.

GENERAL
6
PRODUCT DESCRIPTION
rKOMBI combination storage cylinders consist of a
domestic hot water tank immersed in an inertial storage
cylinder. They are specifically designed for domestic hot
water production and heat integration in heating systems
incorporating r CS25 solar collectors:
The most important technical features of these combina-
tion storage cylinders are:
- The cylinder and coil are specially designed and
shaped for optimum performance in terms of stratifica-
tion, heat exchange and replenishment times
- The vitrified lining of the domestic hot water tank is bac-
teriologically inert for maximum hygiene, reduced lime
scale deposits and easy cleaning
- Water fittings are available at different heights, permit-
ting different hot water generators to be used without
reducing the stratification effect
- CFC-free polyurethane insulation and an elegant exter-
nal casing reduce heat loss and improve efficiency
- A flange is provided for easy cleaning and maintenance
and a magnesium anode is provided to prevent corro-
sion
- 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 domes-
tic hot water tank.
rKOMBI combination storage cylinders can be con-
nected to a special solar controller and can be integrated
in solar heating systems in which rboilers or water
heaters serve as auxiliary heat generators.
rKOMBI combination storage cylinders are identified by three plates:
IDENTIFICATION
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.
bar
kWh/24h
l
W
bar
°C
kW
l
°C
kW
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
T06773001IF
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
ACCUMULO COMBINATO - PRÉPARATEUR SOLAIRE MIXTE
M
Modèle
odello M
N° fabrication
atricola
C
Code
odice A
Année de fabrication
nno fabbricazione
Capacità serpentino sanitario
Capacité du serpentin sanitaire
Potenza assorbita serpentino sup. [T° Primario 80°C]
Puissance absorbée serpentin sup. [T Primaire 80°C]
Capacità accumulo inerziale
Capacité du préparateur inertiel
Press. max. esercizio sanitario
Press. maxi service sanitaire
Temp. max. esercizio sanitario
Temp. maxi service sanitaire
Pot. elett. assorbita
Puiss. électr. absorbée
Press. max. esercizio accumulo inerziale
Press. maxi service préparateur inertiel
Temp. max. esercizio accumulo inerziale
Temp. maxi service préparateur inertiel
Dispersioni secondo EN 12897
Déperditions selon EN 12897
V-Hz
Aliment. elettrica
Alimentation électrique
Collegamento di terra obbligatorio -Raccordement à la terre obligatoire
Matricola
N° fabrication
Modello
Modèle
Prod.ACS prel. cont
Prod.ECS prél. continu
Pot. ass. serp. sup.
Puis. abs. serp. sup.
l/h
l/h
Produzione ACS prelievo continuo
Production ECS prélèvement continu
[ ΔT 35°C]
[ ΔT 35°C]
bar
kWh/24h
l
W
bar
°C
kW
l
°C
kW
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
T06773001IF
RIELLO S.p.A.
Via Ing.Pilade Riello 7
37045 Legnago (VR) - ITALY
ACCUMULO COMBINATO - PRÉPARATEUR SOLAIRE MIXTE
M
Modèle
odello M
N° fabrication
atricola
C
Code
odice A
Année de fabrication
nno fabbricazione
Capacità serpentino sanitario
Capacité du serpentin sanitaire
Potenza assorbita serpentino sup. [T° Primario 80°C]
Puissance absorbée serpentin sup. [T Primaire 80°C]
Capacità accumulo inerziale
Capacité du préparateur inertiel
Press. max. esercizio sanitario
Press. maxi service sanitaire
Temp. max. esercizio sanitario
Temp. maxi service sanitaire
Pot. elett. assorbita
Puiss. électr. absorbée
Press. max. esercizio accumulo inerziale
Press. maxi service préparateur inertiel
Temp. max. esercizio accumulo inerziale
Temp. maxi service préparateur inertiel
Dispersioni secondo EN 12897
Déperditions selon EN 12897
V-Hz
Aliment. elettrica
Alimentation électrique
Collegamento di terra obbligatorio -Raccordement à la terre obligatoire
Matricola
N° fabrication
Modello
Modèle
Prod.ACS prel. cont
Prod.ECS prél. continu
Pot. ass. serp. sup.
Puis. abs. serp. sup.
l/h
l/h
Produzione ACS prelievo continuo
Production ECS prélèvement continu
[ ΔT 35°C]
[ ΔT 35°C]

GENERAL
7
DESIGN
1
2
3
4
6*
7
9*
10
12
11
14
10
17
14
18
28
11
13
19
20
21
22
24
26
27
18
15 16
15 161410 17
13
5
8
23
25
1 - Insulation
2 - Inertial storage cylinder
3 - Solar coil
4 - Return to boiler 1-2
5 - Sleeve for electric heating element
(not supplied)
6* - Outlet from boiler 2 (low temperature)
7 - Domestic hot water tank
8 - Temperature gauge
9* - Outlet from boiler 1 (high temperature)
10 - Magnesium anode
11 - Flange
12 - Cylinder cover
13 - Flange cover
14 - Domestic hot water recirculation
15 - Domestic hot water outlet
16 - Domestic cold water in
17 - Domestic hot water probe well
18 - Vent valve fitting
19 - Heating flow 1 (high temperature)
20 - Boiler probe well
21 - Heating return 1 (high temperature)
22 - Auxiliary probe well
23 - Solar collector outlet
24 - Heating flow 2 (low temperature)
25 - Solar collector return
26 - Solar controller probe well
27 - Heating return 2 (low temperature)
Inertial storage cylinder drain
28 - Flange insulation
(*) with internal deflector

GENERAL
8
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 4 m3/h for model 800 and 5 m3/h
for model 1000.
DESCRIPTION MODEL
KOMBI 800 KOMBI 1000
Type of domestic hot water tank vitrified
Type of inertial storage cylinder non vitrified
Domestic hot water tank layout vertical
Heat exchanger layout vertical
Inertial storage cylinder capacity 560 695 l
Domestic hot water tank capacity 240 285 l
Diameter with insulation 1000 mm
Diameter without insulation 790 mm
Height 1870 2196 mm
Insulation thickness 100 mm
Magnesium anode 32x460 Øxmm
Flange diameter (external/internal) 280/205 mm
Probe well diameter 1/2" Ø
Coil water capacity 16 19 l
Coil heat exchange surface area 2,80 3,16 m2
Power absorbed by coil (*) 76 92 kW
Continuous production of domestic hot water (*) 800 1000 l/h
Water draw in 10 minutes with mean ∆T of 35°
and main buffer tank at:
80°C 515 550 l
70°C 500 515 l
60°C 415 450 l
Maximum working pressure of domestic hot water tank 6 bar
Maximum working temperature of domestic hot water tank 99 °C
Maximum working pressure of inertial storage cylinder 3 bar
Maximum working temperature of inertial storage cylinder 99 °C
Maximum working pressure of coil 6 bar
Maximum working temperature of coil 99 °C
Net weight 210 265 kg
Gross weight (with packaging) 225 281 kg
Heat loss according to EN 12897:2006 at ∆T=45 °C 123 143 W
Energy efficiency class C
Useful non-solar volume (Vbu) 220 255 l

GENERAL
9
COIL pressure drop
PRESSURE DROP (mbar)
FLOW RATE (l/h)
600
700
800
900
1000
1100
500
400
300
200
100
0
0 1000 2000 3000 4000 5000 6000
Mod. 1000 Mod. 800

GENERAL
10
WATER CIRCUIT
MC1
MC2 RI1
MI1
RI2
MI2
RC1-2
RL
UAC EAF
SB
M
RE
R
b rKOMBI combination storage cylinders are delivered without a filling pump. A suitably rated pump
must be provided and installed separately.
For further information on the recommended solar heating circuit flow rate, see the installation instructions
for the water outlet and return kit.
EAF - Domestic cold water inlet
RL - DHW recirculation
UAC - Domestic hot water outlet
MC1 - Outlet from boiler 1
(high temperature)
MC2 - Outlet from boiler 2
(low temperature)
RC1-2 - Return to boiler 1-2
RI2/SB - Heating return 2
(low temperature) /
Inertial storage cylinder drain
MI2 - Heating flow 2
(low temperature)
R - Collector return
M - Collector outlet
RE - Sleeve for electric
heating element
RI1 - Heating return 1
(high temperature)
MI1 - Heating flow 1
(high temperature)