Dimplex ASCARI MA12 User guide

Ascari - 12kW -page 1 -
INSTALLATION AND SERVICING INSTRUCTIONS
TO BE GIVEN TO THE USER
Ref. : 1871184 - 0106157
Made in France
Cast iron installed
electric boiler ModelMA
Informationsgiveninthismanualarenotcontractuals, maythereforechangetechnicalcaractéristicsorcomponentswithoutnotice
• Electronic regulation
• 1 heating circuit
Model : ASCMA 12

Ascari - 12kW -page 2 -
1 - Generalities............................................................................................................... p. 04
1.1-Introduction ................................................................................................................................. p. 03
1.2-Importantinformation................................................................................................................... p. 03
1.3-Description.................................................................................................................................. p. 04
1.4-Dimensions - Hydraulic Connections........................................................................................... p. 06
1.5 - Datas.......................................................................................................................................... p. 07
2 - Installation ................................................................................................................. p. 08
2.1- Location...................................................................................................................................... p. 08
2.2 - Fitting the boiler .......................................................................................................................... p. 08
2.3- Hydraulic connections................................................................................................................. p. 09
2.4-Mixingvalve ................................................................................................................................ p. 09
2.5- Expansion vessel -Pressure safety relief .................................................................................... p. 09
2.6 - Frost protection........................................................................................................................... p. 09
2.7-Bleeding...................................................................................................................................... p. 09
2.8-Plumbing .................................................................................................................................... p. 10
2.9 - Filling loop .................................................................................................................................. p. 10
3 - Electricconnections .................................................................................................. p. 11
3.1 - Electric flow rate, number and cross-section of power connectors,
fuse protection ............................................................................................................................ p. 12
3.2-Powerterminal ............................................................................................................................ p. 14
3.3 -Connection tomains depending on powersupply ........................................................................ p. 15
3.4 - Regulation circuit ........................................................................................................................ p. 16
3.5-Control accessories wiring .......................................................................................................... p. 17
3.6- Wiring diagrams.......................................................................................................................... p. 18
3.7-Heating elements connections .................................................................................................... p. 20
4 - Basichydraulicpatterns............................................................................................. p. 21
4.1 - Direct heating circuit ................................................................................................................... p. 21
5 - 3 speed water pump.................................................................................................. p. 22
6 - Electronic2circuits regulation ................................................................................... p. 23
6.1-Généralities ................................................................................................................................ p. 23
6.2-Controlcommandpannel ............................................................................................................ p. 24
6.3 - Setting the regulation .................................................................................................................. p. 25
6.4 -Operating .................................................................................................................................... p. 27
6.5-Counters ..................................................................................................................................... p. 29
6.6 - Failures display........................................................................................................................... p. 29
7 - Heatingdiagram........................................................................................................ p. 31
7.1-Underfloorheating ....................................................................................................................... p. 31
7.2-Radiators .................................................................................................................................... p. 31
7.3-Specificheatingdiagram ............................................................................................................. p. 32
8 - Maintenance.............................................................................................................. p. 33
9 - Troubleshooting ......................................................................................................... p. 33
Spare parts ............................................................................................................... p. 34
CONTENTS

Ascari - 12kW -page 3 -
1 - GENERALITIES
Features
• Selectable Water Temperature
- radiators / Underfloor (21-80°C)
• 60°C or 100°C thermal cut-out suitable for underfloor heating or radiators
• Room thermostat operation
• Frost protection, 5°C minimum temperature
• Pump protection -once a day operation when system is off
• Pump overrun facility
• 4-stage stepped turn on/off
• Weekly alternative switch start-up for prolonged life
• Automatic water temperature variation for 50% on-off cycles (with room thermostat)
• Switch operation counter -monitors switch usage
• System pressure display
Water heating
It is recommended that the boiler be used for central heating purposes only and hot water be stored and
heated by a direct electric hot water cylinder. This allows hot water to be heated over night on an off-peak
tariff and reduces heat losses between the boiler and the cylinder.
1.1 - Introduction
The Dimplex Ascari boiler is an all electric domestic central heating boiler suitable for use on a 230V 52A
50Hz supply. The unit is easy to install and requires no flue, making it ideal for apartments or properties in
conversation areas.
The unit is supplied ready for operation as a 12kW 230V sigle phase boiler and will automatically modulate
down to 10, 8 and 6kW. The maximum output power may also be manually limited to operation at maximum
power levels of 10, 8, 6 or 4kW upon which the boiler will proportionnaly modulate to lower power levels.
Finishedinaclean white case and with dimensions of 620mmheightx405mm width, the boiler is suitable for
installation in a kitchen area. With thermal cut out selectable at 60°C or 100°C the boiler is suitable for
standard wet radiators systems or underfloor heating.
There are no ventilation requirements associated with the operation of this boiler, however to maintain a dry
atmosphere a well ventilated room is recommended.
1.2 - Important information
• The information given in this booklet is a guide only. All installations must follow the current regulations for
this type of device and where no information or conflicting information is given in this guide to that of the
current regulations, the current regulations will apply.
• Disconnect the Electricity Supply before attempting to remove the cover of the boiler.
• The boiler weighs 38kg and requires two persons to lift and install the product. Please ensure all mounting
fixings and the wall onto which it is to be installaed are sufficiently strong to take the weight of the unit plus
its water contents.

Ascari - 12kW -page 4 -
• The heating system must be installed by a competent person and to current regulations in force at the time.
• All wiring should conform to the regulations in force at the time. The appliance is approved to a protection
rating of IPX1. Therefore if the appliance is to be installed in a room containing a bath or a shower, any
electrical switch or control utilising mains electricity must be so situated that it cannot be touched by a
person using the bath or shower. Attention is drawn to the requirements of the current BS 7671 (I.E.E.
WiringRegulations)andinScotlandtheelectricalprovisionsoftheBuildingRegulationsapplicable inScotland.
• Complete all plumbing work before connecting ther boiler to the electricity supply.
• this appliance must be earthed !
• The boiler should be permanently connected to the electricity supply, direct from a 63A fused supply on the
consumer unit via a double pole linked switch with minimum contact gap of 3mm. No other appliances
should be powered from this supply.
•The expansion vesselis pre-charged to1 bar (0.1MPa).During the installationprocess and beforeoperating
the boiler this should be checked using a suitable pressure gauge.
•A3 bar (0.3MPa) pressure relief device is incorporated within the product, the cold system pressure should
not exceed 1.5bar (0.15MPa).
1.3 - Description
1.3.1 - Settings for low temperature systems (floor heating only)
ASCARI boiler is supplied ready for connection to a high temperature system ranging from 0 to 80 °C with
ahightemperaturesafetylimitatorsetat100 °C(radiators orfloorheatingand DomesticHotWaterproduction).
For connection to a low temperature system ranging from 21 to 50 °C with a high temperature limitator set at
60 °C, adjust parapeter # (TCMA) to a 50°C or lower value (see § 6.3) and connect the 60 °C safety
limitator.
The two safety limitators are located over the electric pannel (see Pic. 1 below).
Ex-work wiring for high temperature system with 100°C high temperature cut-out
Safety limitators with manual reset
60°C 100°C
Dual connector

Ascari - 12kW -page 5 -
Heating system
Parameter # 02
Maximum boiler's
temperature (TCMA)
see § 6.3
Safety limitator AQS
Floor heating (ex-work
settings) 21 - 50°C 60°C permanent
Radiators
or floor heating with
Domestic Hot Water
production (ex-work
settings)
22 - 80°C 100°c
permanent
1.3.2 - Water temperatures settings summary
Electric connection of the 60°C temperature limitator for use with a low temperature system.
Disconnect the dual
connector and connect the
twofemale connectorstothe
60°C safety limitator.
60°C
100°C
60°C 100°C
Dual connector

Ascari - 12kW -page 6 -

 






1.4 - Dimensions - Hydraulic connections
D = Heatingoutflow1"femalenut(26/34)
R = Heatingbackflow1"femalenut(26/34)
(Trapdoor to access elements removed)
405
300
619
Power wire entry Accessories
connection entries
Side view Front view
Bottom view
Top view
Safety relief drain
Ø15
87,5
29

Elements fastener
Heating elements

259
280
81 DR
167
3
4
2
8
9
11
Decoding
1- 3 speed pump
2- 8 liters expansion vessel
3- 3 bar safety relief bleeder
4- La ck of water sensor
6- 60°C safety limitator
7- 100°C safety limitator
8- Boiler's sensor
9- Controlpannel
11 - Fuse

Ascari - 12kW -page 7 -
1.5 - Datas
* : see § 3.3
ASCARI
12 MA
230 V mono
Cast iron
2 heaters comprising 3 x 2kW incoloy elements
12 kW
4
YES
NO
P4 = 6kW
P3 = 8kW
P2 = 10kW
6 kW
Water capacity 5 litres
8 litres
1" (26/34)
0,5 bar
2 bar
3,0 bar
21 °C
80 °C (ex-work) adjustable to 50°C
350
700
2400 l/h
38 Kg
Dimensions Width 405 mm
620 mm
280 mm
IPX1
3,40 kWh / 24 h
Maximum output P1 (ex-work wiring)
Nbr of power stages
230 V mono 50Hz * power supply
Designation
Heat exchanger
Elements
Nominal pressure
Maximum pressure
230V tri 50Hz * power supply
Maximum output P1 adjustment * changing
heating elements wiring
Remote cut-out of one or two power stages
Water connections
Minimum pressure
Expansion vessel
Minimum temperature
Maximum operating temperature
Minimum water flow
Power rate at 70°C
Height
Depth
Nominal water flow
Maximum water flow
Weight
Security class

Ascari - 12kW -page 8 -
2.2 - Fitting the boiler
2.21 - Opening case
2 - INSTALLATION REQUIREMENTS
2.1 - Location
10 10
300
100
The boiler may be opened by unscrewing the
bottomtwobolts a couple ofturns (they do not
need to be removed completely). The front
cover may then be pulled out from the bottom
and lifted off the two top pins.
Switch off the electricity supply to the
boiler before opening the internal cover.
• The boiler must be located at least 300mm above any object to
allow the elements to be removed.At least 100mm is required at
the top of the boiler to allow for connection of pipework.
• 10mm is required at the sides of the unit.
• The boiler must be mounted on an internal solid masonry wall
capable of withstanding the weight of the product when full of
water.
• Consideration should be given to the rounting of electric cables to
the product and the wiring to a thermostat (if used).
• The location must be free from frost and excessives moisture.

Ascari - 12kW -page 9 -
2.2.2 - Main unit
2.3 - Hydraulic connection
Connections to heating circuit are located atop the boiler. Left connection for outflow, right connection for
backflow (see § 1.2).
2.4 - Mixing valve
Ascari installed boiler easily support a backflow temperature higher than the ambient temperature of
surrounding area, which makes unnecessary the use of a mixing valve.
2.5 - Expansion - Pressure safety relief
Expansion is collected by a pressurized 8 liters vessel.
Safety relief bleeder must be connected to a bleed collector with drain (see § 1.2).
2.6 - Antifreeze
Use ethylene glycol only with incorporated corrosion inhibitor.
Glycol ratio must be under 10 %.
2.7 - Bleeding
Make sure to have a bleeding point at the highest level of the hydraulic circuit.
UU
UU
USESE
SESE
SE MANDMAND
MANDMAND
MANDAA
AA
ATT
TT
TORILORIL
ORILORIL
ORILYY
YY
Y BRASSBRASS
BRASSBRASS
BRASS CONNECTCONNECT
CONNECTCONNECT
CONNECTORSORS
ORSORS
ORS SUPPLIEDSUPPLIED
SUPPLIEDSUPPLIED
SUPPLIED ONON
ONON
ON
HEAHEA
HEAHEA
HEATINGTING
TINGTING
TING
OUTFLOUTFL
OUTFLOUTFL
OUTFLOO
OO
OWW
WW
W ANDAND
ANDAND
AND BB
BB
BAA
AA
ACKFLCKFL
CKFLCKFL
CKFLOO
OO
OWW
WW
W WITHOUTWITHOUT
WITHOUTWITHOUT
WITHOUT REMOREMO
REMOREMO
REMOVINGVING
VINGVING
VING THEMTHEM
THEMTHEM
THEM..
..
.
Ø8 screw plug
Overall frame
pattern
Ø8 screw plug
300
29
605
• Once the location of the boiler has been selected,
mark the hole positions as per firgures below. Use
a spirit-level to ensure the holes are aligned
correctly. Access to the bottom screw hole is
achieved by removing the bottom element plate.
• Once marked out, drill 8mm diameter holes and
plug with masonry plugs. Screw in high strengh
screws to a depth that allows the inner face of the
screw head to protrude from the wall a distance to
allow the mounting plates at the rear of the boiler
to engage (approx. 5mm).
• With suitable equipment or an assistant raise the
boiler to the fixing point and ensure each screw
has engaged into the mounting slots. Tighten the
screws to secure the boiler to the wall.
• Once fixed to the wall the boiler may be plumbed
into the central heating system.

Ascari - 12kW -page 10 -
Stop
valve
2.8 - Plumbing
• The system should be flushed prior to connecting the boiler to remove all particles from the pipework. Do
not use the fitted pressure relief valve to flush the system as particles trapped in the valve will cause
incorrect valve operation.
• At least one air bleeding device should also be connected to the highest point of the plumbing system to
remove trapped air and ensure silent running of the heating system.
• If using radiators with Thermostatic Radiator Valves a bypass radiator must be fitted with lockshield valves
that will allow a flow of 350 litres/hour.
• Service valves should be connected to the inlet and outlet of the boiler for easy maintenance.
•Although the boiler canoperatewithout a room thermostatthis is required for automaticadjustmentofboiler
output temperature.
• Where underfloor heating is being used, the 60°C thermal cut-out must connected in place of the factory
selected 100°C device (see section 1.3.1).
• A drain cock is required to be fitted in the lowest part of the heating system to allow the system fluid to be
drainedfully.
• A filling loop must be installed that isolates from the cold mains water supply from the heating system and
complies with the current building and water regulations in force at the time.
• The boiler incorporates an 8-litre expansion vessel which is suitable for heating systems as follow :
2.9 - Filling loop
Thisboiler is notfitted with afilling loop.Any fillingloop being fittedshould comply withthe water supply(water
fittings)regulations 1999 SectionG24.1 and G24.2.Afillingloop shouldbe fitted atsome point toallow the CH
system to be filled.
Two tipes are shown below : METHODS OF FILLING A SEALED SYSTEM
Temporary Flexible Hose
Connection
To be removed
immediately after filling
Mains
water
supply
Pressure Pump &
reducing valve
(if required)
Cistern &
Overflow
Mains
water
supply
Heating
System
Return
Double
check
valve
assembly
Stop
valve
Stop
valve
Heating
System
Return
Recommended and approved method for filling closed circuits in a house.
(R24-2a Water Regulations Guide)
Initial system pressure (bar) 0,50 0,75 1,00 1,50
Total water in heating system (litres) 96 84 73 50
For larger systems Multiply the volume water by these factors 0,0833 0,093 0,109 0,156
METHOD B
METHOD A
F
F

Ascari - 12kW -page 11 -
3 - ELECTRIC CONNECTIONS
IMPORTANT NOTICE
Electric connections might be loosed during transportation.
To avoid abnormal overheat, carefully check quick connection terminals and screwed connections.
• Wiring external to the appliance must be in accordance with the current I.E.E. Wiring Regulations (BS
7671) for electrical installation and any local regulations, which apply.
• With the boiler plumbed in the electrical connections can be made to the boiler :
• This appliance must be earthed !
• TheAscari boiler comes with cage-clamp connectors. These are operated using a 2.5mm x 0.4mm blade
screwdriver for accessory terminals and 3.5mm x 0.5mm blade screwdriver for power terminals.
• The boiler should be permanently connected to the electricity supply, direct from a 63A fused supply on the
consumer unit wia a double pole linked switch with minimum contact gap of 3mm. No other appliances
should be powered from this supply.
• To connect a wire, insert the blade of the screwdriver into the opening located just above or below the
central mark of the terminal block and pivot the blade towards the centre. The wire may then be inserted
into the cage and the screwdriver blade removed.
• External command (a phase 230V common to the boiler must be connected to terminal 25).
• The power supply cable should be routed through the large cable entry point at the bottom of the boiler. If
desired the cable entry may be moved to the top of the boiler by removing the self sealing nut from the
bottom to the top entry point.
• The Earth wire should be connected to the top terminal marked with the Earth symbol.
• The Neutral wire should be connected to the large terminal marked "N".
• The live wire to the large terminal labelled PH.
• Do not switch on the electricity supply until asked to do so in the Commissioning and Testing section.
•As a minimum it is recommended that a room thermostat be installed to control the appliance. Thermostatic
radiator valves may be fitted to the system, however they must not be fitted in the room where the room
thermostat is fitted. There must be at least one radiator installed with lock shield valves that should not be
closedand will allow350 litre/hour circulation.Further guidance canbe obtained fromtheDomestic Heating
and Hot Water Guide to the building regulations.

Ascari - 12kW -page 12 -
3.1.2 - Number and cross-section of connectors
Example: Cord type U1000, loose in open air rack, ambient temperature 20°C, lenght 15 m.
IMPORTANT
Follow local existing regulations regarding electric connections
Electric connections to mains must be installed according to local and national regulations, which generally
specify:
• Type of connectors :
- Type of slipcover
- Number and cross-section of wires,
- etc...
• Type of installation :
- Magnetic interferences inside bundles,
- Ambient temperature,
- Open or covered wires,
- Length of cords,
- etc...
Ph = Phase = 16²
N = Neutral = 16²
ASCARI 12 12 kW 2 x 16² + T *
MINIMUM cross-section for each connector in mm²
and number of connectors for above example
Maximum
output P1
Boiler 230 V mono
3.1.1 - Electric datas
3.1- Electric flow rate, number and cross-section of the power
connectors, fuse protection
Amperes for each phase
230 V mono
ASCARI 12 12 kW 52 A
Maximum output P1Boiler

Ascari - 12kW -page 13 -
* : Cross-section of ground connection must be equivalent to cross-section of largest phase/neutral.
Manufacturer cannot be, for any reason, regarded as faulty in case of improper choice of connection
wires to mains, or in any case of damages resulting from installation solutions.
3.1.3 - Fuses
230 V mono
2 x 16² + G *
MAXIMUM cross-section for each connector in mm²
and number of connector for above example
ASCARI 12 12 kW
Boiler Maximum
output P1
Fuses for connection to mains
230 V mono
ASCARI 12 12 kW 63 A
Maximum
output
P1
Boiler

Ascari - 12kW -page 14 -
1:Introduce the blade of the driver into the opening located just
above or bellow the mark with a slight pivoting move to center.
2:Introduce the connector's terminal inside the cage.
3:Remove the screwdriver
3.2 - Power terminal
Connections are cage-clamp terminals, to be used as to follow :
- For accessories terminals use a 2,5 x 0,4mm blade screwdriver
- For power terminal use a 3,5 x 0,5mm or 5,5 x 0,8mm blade
screwdriver.
Screw A
5 self-sealing nuts for accessories connections
(Ambience thermostat, outside and/or Domestic Hot
Water sensor and remote cut-out)
Put the self-sealing nut (supplied with the boiler) for
connection to mains from the bottom of the casing.
or
Put the self-sealing nut (supplied with the boiler) for
connection to mains from the top of the casing. In
this case remove the plastic cap and close the hole
below casing using same.
Plastic cap moved from top
to bottom

Ascari - 12kW -page 15 -
3.3 - Connection to mains depending on power supply
: see §3.1 forconnectors crosssection
and requested fused switch or
electro-thermic breaker.
NOTE : Denuded length of wires between 16 and 17mm
Neutral
Phase
Ground
I

Ascari - 12kW -page 16 -
L1 : Phase
N : Neutral
F : 4A fuse size 5 x 20
C1 : Electronic card with display
CC : 3 speed pump
SC : Boiler's sensor
AQS1 : 60°Csafety limitatorwith manualreset
AQS2 : 100°C safety limitator with
manual reset
K1 to K4 : 20A power breakers
DT : Total cut-out (remove the bridge)
DP1 & DP2 : Partial cut-out(removethebridge)
R : External command relay
S.Ext : Outside Temperature sensor
Decoding :
3.4 - Regulation circuit drawing
grey
Rbrown
L1
CP
C1
F
2
1
CC
8
7
blue
yellow
11
DT
10
9
blue
N
K4
A1
K2
K1
12
blue
T
100°C
AQS2
blue
60°C
AQS1 15
14
blue
blue
DP1 13 DP2
brown
white
white
SC
red
black
orange
blue
yellow
white
A2
A2
A1
white
black
red
A1
A2A2
A1
K3
brown
brown
14
11
4
3
6
5grey
grey
pink
pink
R
red
25
external
command
phase
A2
A1
T
neutral
blue
S.Ext

Ascari - 12kW -page 17 -
3.5 - Control accessories wiring
1 - 2 : External command relay contact
3 - 4 : Outside temperature sensor
10 - 11: Totalcut-outDT(removethebridge)and/or65°C heating
floor safety limitator (mandatory) with manual reset.
See § 1.3.1.
12 - 13: Partial cut-out DP1 (remove the bridge)
14 - 15: Partial cut-out DP2 (remove the bridge)
25 : External command (use phase 230V common to the
boiler on pin L1)
• To avoid electro-magnetic interferences, power connection and sensors connections will be
isolated.Also avoid using diversion box.
• Connectors will be of electrolitic quality brass (no corrosion of denuded ends at connection
points).
• Never use telephone wire (cross-section of sub-connectors too thin and easy breakable at
connections points).
• Cross-section of connectors must be between 0,5 and 1mm².
CC
2
R
15
1413
12
1110
9
8
7
6
5
1
14
11
External
command
43 25
S.Ext

Ascari - 12kW -page 18 -
Légende :
AQS 1
60°C
GND1
+Vdc 2
3
OUT 4
blanc
jaune
gris GND
OUT
+Vdc
230 V / 12 V
adaptator
6
5
4
3
2
1
black
red
yellow
white
pink
grey DHW sensor (S.ECS)
pink Outsidesensor(S.Ext)
grey
white
white boiler's sensor (SC)
ambiencethermostat(TA)
SC
red
blue
black orange
F
13 11
10
9
45678
212 13 14 15 NNNPH
PH
PH
PH
red
red
black
black
white
white
TT
blue AQS 2
100°C blue
brown
brown
red
black
white
blue
blue
(1) : In optionnal
AqECS : Domestic Hot Water Safety limitor
ou
SExt(1) : Outsidesensor
SC : Boiler'ssensor
PH : Phase
N : Neutral
F : 4A fuse size 5 x 20
C1 : Electronic card with display
CC : 3-speed pump
TA : Ambiencethermostat
NPH
brown
brown
blue
DHW pump C.ECS
Heating pump CC
230Vpower
pressuresensor power
pressure sensor connect.
3.6 - Wiring diagrams
S.Ext CC
brown
green
yellow
blue

Ascari - 12kW -page 19 -
AQS1 : 60°C Safety limitor with manual reset
AQS2 : 100°C safety limitor with manual reset
Légende :
L2 L3 L1 L4 A1
A2
T4
T3
T2
T1
K2 L2 L3
L1 L4 A1
A2
T4T3T2
T1
K4
L2 L3
L1 L4 A1
A2
T4
T3
T2
T1
K1 L2 L3
L1 L4 A1
A2
T4T3
T2
T1
K3
red
balck
white
white
red
black
white
red
white
yellow
white
black
blue bleu
blue
red
black
red
balck
blue
T1 T2
bleu
bleu
red
black
white
brown
brown
blue
black
red
yellow
white
12 25
R
a2
a1
11
14
red
K1 to K4 : 20A power breakers
T1 & T2 : 6kW heating elements

Ascari - 12kW -page 20 -
3.7 - Heating elements connections
Connections of the heating elements will have to be adjusted according to requested output, depending on
the volume and the insulation of the space to heat.
* Remove bleu connectors between power terminal and elements
according to drawing.
See § 1.4 to access elements.
ex-work wiring
R : Red
Bl : Black
W : White
B : Blue
12 kW 10 kW*
8 kW* 6 kW*
4 kW*
R
BBBB
WBl WBlR
BB
R
BBB
WBl WBlR
BB
R
BBB
WBl WBlR
B
R
BB
WBl WBlR
B
R
BB
WBl WBlR
View from bellow