Technical Improvements Micra Range

Name of project: Micra Vintage

Boilers involved: Micra 2

Name of new boiler: Micra 2

•The names will be the same as before

•The modifications will be intended as technical improvements

• The boiler codes will be same as for current models

• No technical functions added

•Same control panel

•Same dimensions

•Same aesthetics

AESTHETICS MICRA

Current range

Micra 2

New range

Micra 2

MICRA 2 AESTHETICS

How to distinguish current from new in the

field?Instructions’ sticker on flap

Current

New

Micra 2 boilers

NATURAL DRAUGHT FAN ASSISTED

CURRENT

INTERNAL VIEW

Micra 2 E Micra 2 SE

New

NEW

INTERNAL VIEW

Electric 3-way valve

Flowmeter

New fixing way for DHW exchanger

HYDRAULICS

New

Micra 2

Current

Micra 2

The same Fixing Template as before

Current

Micra 2

HYDRAULICS

New

Micra 2

New flowmeter for water detection

• Pre-assembled by supplier (FITRE) ensuring functioning.

• Opportunity to fit the liter-counter at the top

• REED Contact

• Tongues’ support to improve fixing and stability

• Hexagonal base to avoid torsional stress

HYDRAULICS

Connections bracket

Flowmeter’s base

New 3-way motorized valve – Supplier “Giannoni”

HYDRAULICS

DHW NTC

Supplier “EPCOS”

Heating NTC Supplier “EPCOS”

The same features as in current version

Sparkling Igniter

Supplier “ANSTOS”

HYDRAULICS

ELECTRONICS - main PCB

Supplier “Honeywell”

Current

Micra 2

Micra Condensing

Supplier “Nordgas”

New

Micra 2

Micra Condensing

Same features and technical characteristics as in current version

ELECTRONICS - main PCB

6 MICROSWITCHES

ELECTRONICS - main PCB

SW1 = OFF --- boiler works with NATURAL GAS

SW1 = ON --- boilerworks with LPG

SW2 = OFF --- Range temperature setting TA1 Standard: 35°C / 78°C

SW2 = ON --- Range temperature setting TA1 Ridotta: 25°C / 45°C

SW3 = OFF --- Delay of 3 minutes before restarting, after heating demand

SW3 = ON --- No delay setted

SW6 = OFF --- Water automatic fill-in not enabled

SW6 = ON --- Water automatic fill-in enabled (Must be OFF for your boilers)

SW4 = OFF --- Max achievable temp on DHW demand OFF 75°C / ON 65°C (Standard)

SW4 = ON --- Max achievable temp on DHW demand OFF Tset + 3°C / ON Tset +2°C

SW5 = OFF --- Working pump STANDARD

SW5 = ON --- Working pump OFF during heating demand

How will microswitches be on boiler?

–New boilers = All OFF (SW1 based on gas type)

–Spares = All OFF

ELECTRONICS – LCD

Supplier “Honeywell” Supplier “Nordgas”

Current

Micra 2

New

Micra 2

Same features and technical characteristics as in current version

New Micra Vintage range will manage the same accessories as current Micra 2 range

ACCESSORIES

SUMMARY

...will change:

•Supplier of main PCB

•Supplier of LCD

•Supplier of NTC sensors

•Supplier of Sparkling igniter

•3-way valve

•Brass hydraulic group

•DHW exchanger

•DHW flowmeter

...will not change:

•Name and codes of boilers

•Control panel

•Combustion chamber

•Gas valve

•Dimensions

•Accessories

•Aesthetics