Riello Vokera Easi-Flo LE Release note

Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
Installation
& Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Easi-Flo le
Water heater
G.C. N. 52-094-10 (NG)
G.C. N. 52-094-11 (LPG)

2
1 GENERAL 3
1.1 General warnings ................................. 3
1.2 Fundamental safety rules ........................... 3
2 DESCRIPTION 3
2.1 Structure ........................................ 3
2.2 Technical data.................................... 4
2.3 Water circuit ..................................... 5
2.4 External wiring ................................... 6
3 GENERAL REQUIREMENTS 7
3.1 Terminal position for fan assisted appliance............. 7
3.2 Principle components .............................. 7
3.3 Mode of operation................................. 7
3.4 Safety devices ................................... 7
3.5 Related documents................................ 8
3.6 Location of appliance .............................. 8
3.7 Gas supply ...................................... 8
3.8 Flue system ..................................... 8
3.9 Air supply ....................................... 8
3.10 Water pipe work .................................. 8
3.11 Pipework........................................ 8
3.12 Drain cocks...................................... 8
3.13 Electrical supply .................................. 8
3.14 Timber framed buildings ............................ 8
4 INSTALLATION 9
4.1 Delivery......................................... 9
4.2 Contents ........................................ 9
4.3 Unpacking....................................... 9
4.4 Preparation for mounting the appliance ................ 9
4.5 Fittingtheue .................................... 9
4.6 Connecting the gas and water ...................... 12
4.7 Electrical connections............................. 13
4.8 CASING REMOVAL .............................. 13
4.9 Emptying the water heater ......................... 13
5 USER 14
5.1 Do’s and don’t’s ................................. 14
5.2 Guarantee registration card ........................ 14
5.3 Benchmark log book.............................. 14
5.4 How does it work? ............................... 14
5.5 Diagnostic fault indicator .......................... 14
5.6 Control panel ................................... 14
5.7 Description of icons .............................. 14
5.8 Selecting functions ............................... 14
5.9 Before switching on .............................. 15
5.10 Lighting the appliance............................. 15
5.11 Temporary shutdown ............................. 16
5.12 Shut down for long periods......................... 16
5.13 How to care for the appliance....................... 16
5.14 What if i suspect a gas leak ........................ 16
5.15 What if the appliance is due its annual service.......... 16
5.16 What if i need to call an engineer .................... 16
5.17 Parameters menu ................................ 16
5.18 Reset to factory settings ........................... 17
5.19 Reset to factory settings ........................... 17
6 COMMISSIONING 18
6.1 Gas supply installation ............................ 18
6.2 Water pipe work ................................. 18
6.3 Pre-operation checks ............................. 18
6.4 Initial lighting.................................... 18
6.5 Checking the burner pressure ...................... 18
6.6 Setting the outlet temperature ...................... 18
6.7 Final checks .................................... 18
6.8 Instructing the user ............................... 18
7 SERVICING 19
7.1 General........................................ 19
7.2 Routine annual servicing .......................... 19
7.3 Replacement of components ....................... 19
7.4 Component removal procedure ..................... 19
7.5 High limit thermostat.............................. 19
7.6 Flow switch ..................................... 19
7.7 Burner......................................... 20
7.8 Flue fan........................................ 20
7.9 Heat exchanger ................................. 20
8 CHECKS, ADJUSTMENTS, AND FAULT
FINDING 21
8.1 Checking appliance operation ...................... 21
8.2 Appliance mode of operation ....................... 21
8.3 Checking and adjusting burner pressure .............. 21
8.4 Maintenance ................................... 21
8.5 External faults................................... 22
8.6 Electrical checks................................. 22
8.7 Operating faults and reset ......................... 22
8.8 Faultnding .................................... 22
9 L.P.G. INSTRUCTIONS 23
9.1 Gas supply ..................................... 23
9.2 Gas supply installation ............................ 23
9.3 Checking and adjusting burner pressure .............. 23
10 GAS TRANSFORMATION 23
10.1 Adjustments .................................... 24
The following symbols are used in some parts of this
booklet:
b
CAUTION = actions that require special care and suitable
preparation
a
PROHIBITED = actions that absolutely must NOT be carried
out
The Vokera Easi-Flo le water heater complies with:
- Regulation (EU) 2016/426
- Electromagnetic Compatibility Directive 2014/30/EU
- Low Voltage Directive 2014/35/EU
- Ecodesign Directive 2009/125/CE for energy-related products
- Regulation (EU) 2017/1369 Energy labelling
- Delegated Regulation (EU) No. 812/2013
- Delegated Regulation (EU) No. 814/2013.
0476

3
1 GENERAL
1.1 General warnings
b
After having removed the packaging, check that the material
supplied is intact and complete; if this is not the case, contact
Vokera Ltd .
b
The Easi-Flo waterheatermustbeinstalledbyqualiedperson-
nel as detailed under any current standards and law applicable
and with the instructions provided by Vokera Ltd in the manual
supplied with the appliance.
b
The water heater must be used for the purposes it has been
expressly manufactured.
Vokera Ltd declines all contractual and
extra-contractual liability for damage caused to persons, animals
or things, due to errors in installation, control, servicing or im-
proper use.
b
In the event of water leaks, disconnect the water heater from the
mains power supply, close the water supply and promptly notify
Vokera Ltd orotherprofessionallyqualiedpersonnel.
b
If the water heater is not used for an extended period, the follow-
ing minimum operations must be completed:
- move the main system switch to "off".
b
Servicing must be performed on the water heater at least once
a year.
b
This manual is an integral part of the water heater and as a con-
sequence must be kept with care. If the manual is damaged or
lost, contact Vokera Ltd for another copy.
b
When the product reaches the end of its life it should not be
disposed of as solid urban waste but should be brought to a
separated waste collection facility.
b
This appliance should not be operated by children younger than
8 years, people with reduced physical, sensory or mental ca-
pacities, or inexperienced people who are not familiar with the
product, unless they are given close supervision or instructions
on how to use it safely and are made aware by a responsible
person of the dangers its use might entail. Children must not
play with the appliance. It is the user's responsibility to clean and
maintain the appliance. Children should never clean or maintain
it unless they are given supervision.
1.2 Fundamental safety rules
The use of products that operate on fuel, electricity and water requires
a number of fundamental safety rules to be observed, including:
a
The water heater must not be used by children or invalid persons
without supervision.
a
Electrical devices or appliances, such as switches, household
appliances, etc. must not be used if there is the smell of gas or
unburned fuel. In this case:
- ventilate the room by opening doors and windows;
- close the fuel stopcock;
- promptly contact Vokera Ltd , your gas supplier or other profes-
sionallyqualiedpersonnel.
a
Do not touch the water heater when barefoot or with wet parts
of the body.
a
No service or cleaning operations may be performed without
rsthavingdisconnectedthewaterheaterfromthemainspower
supply, moving the main system switch to "off".
a
The safety or control devices must not be adjusted without the
authorisation and written instructions from the manufacturer of
the water heater.
2 DESCRIPTION
The Vokera Easi-Flo is an instantaneous water heater, which - by design - incorporates electronic ignition, NTC temperature control and a coaxial
uethatcanberotated–horizontally–through360degreesforvarioushorizontalorverticalapplications.
The Easi-Flo le can also be used with the Vokera twinuesystem.
All installers are asked to follow the Benchmark Scheme by adhering to the Code of Practise, which can be obtained from
www.centralheating.co.uk.
2.1 Structure
4
3
2
1
5
6
7
8
9
11
10
12
81
246
62
120
400
ø60
74 74
ø100
640
1 Maximum temperature thermostat
2 Cooled burner
3 NTC sensor
4 Fan
5 Exhaustueduct
6 Air pressure switch
7 Pressure/depression
8 Exchanger
9 Ignition/detection electrode
10 Burner thermostat
11 Gas valve
12 Waterowswitch

4
2.2 Technical data
DESCRIPTION Easi-Flo Units
Nominal heat input 30.00 kW
25,800 kcal/h
Nominal heat output 27,60 kW
23.736 kcal/h
Reduced heat input 10.50 kW
9,030 kcal/h
Reduced heat output
9,89 kW
8.506 kcal/h
Category
II2H3P
Destination country GB - IE
Congurationtype
B22-B52;C12-C12x;C32-C32x;C42-C42x;C52-C52x;
C62-C62x;C82-C82x;C92-C92x
Gas characteristics
Lower heat output
G20 34,02 MJ/m³S
G31 88
Lower Wobbe index (15°C 1013 mbar)
G20 45,67 MJ/m³S
G31 70,69
Nominal supply pressure
G20 20 mbar
G31 37
MaximumgasowrateinDHWmode
G20 3,17 Sm³/h
G31 2,33 kg/h
Maximum DHW pressure
G20 15,20 mbar
G31 35,30
Ømainburnernozzle
G20 0,85 mm
G31 0,52
Fluegasmassowrate(max/min)
G20 20,887 - 12,733 g/s
G31 20,664 - 12,006
Nozzles 28 n.
Ø gas connection 3/4"
Concentric ue gas outlet pipes
Diameter 60/100 mm
Maximum length 2,6 m
Loss due to 45°/90° bend 1/1,5 m
Wall hole 105 mm
Separate ue gas outlet pipes
Diameter 80 mm
Maximum length 6+6 m
Loss due to 45°/90° bend 1,2/1,7 m
Flue gas temperature (max/min) G20 135-72 °C
G31 137-71
Minimum pressure 0,2 bar
Nominal pressure 2 bar
Maximum pressure 10 bar
DHWminimumowrate 2 l/min
QuantityofhotwaterwithΔt30°C 13,2 l/min
Ø water connections 1/2"
DHW temperature selection range 36-65 °C
Flow regulator 12 l/min
Total electrical power 41 W
Internal fuse 2 A
External fuse 3 A
Power supply voltage 230/50 V/Hz
Protection rating IPX4D
Appliance dimensions
Height 640 mm
Width 400 mm
Depth 246 mm
Net weight 21 kg
Clearances
Top 150mmfromcasingor25mmaboveueelbow
(whichever is applicable)
Bottom 150 mm
Sides 50 mm
Front 600 mm
Connections
Cold water 15 (compression) mm
Hot water 15 (compression) mm
Gas 15 (copper) mm

5
Parameter Symbol Value Unit
Waterheatingenergyefciencyclass - A -
Declaredloadprole - XL -
Waterheatingenergyefciency ηwh 82,0 %
Daily fuel consumption Qfuel 24,225 kWh
Annual fuel consumption AFC 18 GJ
Daily electricity consumption Qelec 0,082 kWh
Annual electricity consumption AEC 18 kWh
Sound power level, indoors LWA 51 dB(A)
Emissions of nitrogen oxides NOx 40 mg/kWh
2.3 Water circuit
outlet hot water inlet cold water
Gas
1 Maximum temperature thermostat
2 By-pass
3 NTC sensor
4 Exchanger
5 Cooled burner
6 Gas valve
7 Flow regulator
8 Flow switch
9 Filter
UAC EAF
3
2
18
7
6
5
4
9