Unical !DEA DEPLIANT

SIMPLY...UNIQUE

Pure technology

Clean design and practical panel board

with wide “Power save” display

The idea of !DEA was born from three concepts:

Maximum easiness of use
Extreme reliability
Highest installation speed

The range consists of 25 wall hung gas boilers (14 for indoor
installation and 11 for outdoor installation) for heating only or for
heating and D.H.W. production, both, in room sealed or natural
draught versions, with electronic ignition and conventional
combustion.
!DEA can operate with natural gas or LPG.
Electrical protection degree is IPX5D (IPX4D for natural draught version).

It has been conceived both, for the fi rst installation and for
replacement of existing boilers in a very simple way.
Thanks to the electronics, developed together with Honeywell,
and to the rationalization of the assembly, that make it unique,
impresses for the maintenance simplicity and for its sturdiness.

Elements that reinforce this imagine:

completely metallic casing
epoxy-polyester painting
sound and thermal insulation with 8 mm thick material
thermal refl ecting layer
completely metallic hydraulic connections

The aesthetics of the front panel has simple, engraved, curved
lines, that confer great solidity to the whole assembly and integrate
pleasantly the panel board, including:

• two knobs

• a time-controlled back lighted display
for the maximum electric saving

• boiler pressure gauge
!DEA disposes of a complete catalogue of accessories, smoke pipes,

modulating or ON/OFF thermostats, outer sensor, allowing to solve
any installation problem.

Models

!DEA AR 23

!DEA AC 23

!DEA RS 24

!DEA RS 18 - 32

!DEA RS 28

!DEA CS 24

!DEA CS 18 - 32

!DEA CS 28

!DEA AC 23 PLUS

!DEA CS 24 PLUS

!DEA CS 28 - 32 PLUS

!DEA CS 28 INC

natural

draught

INDOOR installation

room sealed

fan assisted

bithermal heat

exchanger

mono thermal

heat exchanger

electric

diverting valve

DHW plates

heat exchanger

OUTDOOR installation

on WALL in CABINET

In combination with

the rubber top and

mounting jig

In cambination with

the built-in frame

The mechatronics of !DEA

Bi-thermal copper heat exchanger for
!DEA AC 23, CS 18-24-28-32,
CS 24-28 EXT, CS 24-28 INC
(with different lengths)

Pump body with built-in air vent

Mono-thermal copper heat exchanger for
!DEA AR 23, AC 23 PLUS,

Panel board with back lighted,

multifunctional, “Power save” display
RS 18-24-28-32, RS 24-28 EXT, RS 24
INC, CS 24-28-32 PLUS, CS 24-28 PLUS
EXT, CS 32 PLUS EXT, CS 24 PLUS INC

The pump, when the boiler
remains in STAND BY position
for more than 24 hours, receives
an impulse for 5 seconds by
the microprocessor, in order to

IMPULSE

avoid jamming.

R

O

T

A

T

I

N

G

S

Y

S

T

E

M

R

O

T

A

T

I

N

G

S

Y

S

T

E

M

TIME (hours)

Pump anti-jamming function timer Frontward rotating panel board for an

easy access to the internal components

HONEYWELL electronic PCB with
microprocessor

Built-in fl ow switch

Anti-frost protection

for high reliability

The components quality

The copper heat exchangers

Under the same casing are foreseen, according to the model, different
types of heat exchangers, with fast connections, in order to speed up

the maintenance, carefully studied.

!DEA AC 23 - !DEA CS 18 - 24 - 28 - 32

!DEA CS 24 Ext - !DEA CS 24 -28 Inc

Bi-thermal ultracompact heat exchanger, with a large fi nned
surface made of six copper pipes of oval section, where inside are
inserted the pipes for sanitary water circulation (up to 17,83 l/min)
with a temperature difference between inlet and outlet of 25K, assures
the maximum rapid heat exchange.

• Combustion effi ciency up to 94,4% at full load.

• High combustion quality with CO2 up to 8.5% and CO at 58 ppm.

• Effective air venting thanks to the oversized manifolds, that assure an
easy water circulation and a remarkable noise reduction thanks to the
reduced internal pressure losses.

• Maximum thermal exchange speed due to the large number

of exchange fi ns.

• Drastic reduction of the scaling deposits.

• Fast hydraulic connections.

• Immediate hot water production if compared to the traditional
instantaneous boilers.

• Quick answer to the temperature variations, thanks to the very

low inertia as result of materials and shape.

• Sensible energy saving.

Bi-thermal copper heat exchanger

!DEA AR 23 / RS 18-24-28 / AC 23 Plus / CS 24 - 28 - 32 Plus

!DEA RS 24 Ext - !DEA RS 24 Inc

Mono thermal ultra-compact heat exchanger with fi nned surface
that winds six oval-shaped copper pipes.

• Combustion effi ciency of 94.6% at full load.

• High combustion quality with CO2 up to 8.4% and CO at 60 ppm.

• Fast hydraulic connections.

The high comfort combi

DHW stainless steel plate heat exchanger

(n°12 plates for 23 and 24 kW - n°14 for 28 kW n°16 for 32 kW)

This choice gives an higher exchange surface, so, with the same water

temperature and needed quantities, it’s possible to let the boiler work

with lower temperatures, obtaining:

- Constant water temperature during the drawings

- DHW production up to 18,47 l/min with Δt 25 K.

Monothermic primary heat exchanger

(for AC 23 Plus and CS Plus 24 - 28 - 32):

it guarantees all the necessary capacity and the ideal effi ciency
at all load conditions.

Motorized diverting valve (for all Plus models), of new conception,
result of Unical technologic study, its part of a brass hydraulic group,
very compact and, thanks to the powerful electric motor, allows

quickly and safely to divert the hot water produced by the primary
heat exchanger, to the plate heat exchanger or in loop to the heating
circuit, optimizing the operation in temperature modulation.

Mono thermal copper heat exchanger

Technology for the comfort

Supplied as standard
for all the range

The design has particularly cured the internal
positioning of all the components together with the
search of the best compromise between compactness
and ease of maintenance.

The wide burner in stainless steel

with 11 ramps (for 18 - 23 and 24 kW), 13 ramps (for

28 kW) and 15 ramps (for 32 kW) produces a silent and

well distributed combustion.

The digital electronic ignition

with three fl ame ignition attempts, exalts its reliability in

every climatic condition, both “at cold and hot start”.

The continuous proportional/integral modulation of the

gas managed by the HONEYWELL driving PCB, both in

CH and DHW mode, through two temperature control

sensors (for DHW and CH), determines, with a precision

close to 1 K, the certitude of the pre-set adjustments.

High performances

Highly effective pump

among the most reliable ones, complete with fast removable

air vent, has been selected to compose a redoubtable hydraulic

group, suitable for all the models.

At last, an assembly of electronic functions exalts the

completeness of its performances.

The anti-overheating post-circulation

of 15 seconds controls, in every condition, the thermal

equilibrium between fl ow and return, also after strong

drawings of DHW, whilst, in CH mode, with a lasting of 5 min,

allows to exploit all the residual heat.

The anti-frost protection

intervenes at 5°C and is activated both, in DHW and in CH

mode, increasing the boiler temperature at 15°C. The risk that

!DEA could freeze, if the low temperature, where the boiler is

installed, persists, is avoided.

If there is lack of gas, the lockout of the boiler will be shown

on the display.

The pump anti-jamming function

also after long inactivity periods, sends an impulse to the

pump for 5 seconds, every 24 h stop, that makes the pump in

operation, thus avoiding the oxidation could block it.

The technical service function

makes easier the combustion adjustment operations.

By depressing the reset button for more than 3 seconds, it is

possible to obtain the boiler operation, at min. or max. output,

for 15 min, so that the necessary gas valve adjustments can be

made.

The air pressure switch

has been selected in order not to be infl uenced by the external

climatic conditions that could make its function fruitless.

lic

Dimensions of the models for indoor
installation:

height: 700 mm
width: 420 mm
depth 255 mm

(345 mm for all 28 and 32 kW models)

The on wall mounting of the outdoor
installation models have the same

dimensions of the correspondent indoor
models. The only difference, for the on wall
mounting boilers on the outdoor installations
is the addition of a special rubber top to
protect the boiler from the rain.

The cabinet for the in cabinet mounting
models (Inc) have the following
dimensions:

height 1140 mm
width 550 mm
depth 260 mm

The model !DEA CS 28 Inc is less deep than
the correspondent indoor model because the
expansion vessel is placed beside, instead of
behind the boiler, within the cabinet.

Intuitive controls

CH temperature adjustment DHW temperature adjustment

Reset button / Technical service function button

Info-display Manometer

Panel board

The electronic panel board will result familiar immediately.
And last, but not least, all the harness and intervention operations are easily made by the frontward rotation
of the panel board.

The multifunction LCD display, with time controlled back lighting, allows:

The reading of the CH and DHW temperatures
The showing of the burner lockout due to lack of fl ame
The operation/stand-by status
The diagnostics with indication of 11 possible faults
L.H. side knob with double function: ON-OFF switch and CH temperature setting between 45 and 78°C
R.H. side knob with DHW temperature setting between 35 and 57°C

Accessories (optional)

REMOTE CONTROL
REGOLAFACILE
modulating, weekly

Code 00361971

ON-OFF
CHRONOTHERMOSTAT

REGOLAFACILE

Code 00362905

CHRONOTHERMOSTAT

GA 240

Code 00362968

REMOTE CONTROL

SIM-CRONO

modulating, weekly
Code 00362904

For further information related to the accessories (smoke evacuation, hydraulic connections, kit of D.H.W. production for versions heating
only) compatible with the series !DEA, consult the web site www.unical.eu

P

OUTER
TEMPERATURE
SENSOR

Code 00362077

RUBBER TOP FOR
PROTECTION AGAINST RAIN

Code 00362524 (mod. 24)
Code 00363187 (mod. 28 e 32)

HYDRAULIC CONNECTIONS
CASE

Code 00362673 (mod. 24)
Code 00362674 (mod. 28 e 32)

Dimensions - Technical data

!DEA AR 23 - AC 23

AC 23 PLUS

700

420

INDOOR INSTALLATIONOUTDOOR INSTALLATION

Upper view

172,5 247,5

Bottom view Upper view Bottom view Upper view Bottom view

115

C

117

!DEA RS 24 EXT

CS 24 EXT

CS 24 PLUS EXT

700

420

255

34

700

255

S

vs

R

C

F

8471

R

M

SC

6170130605643

ON WALL

!DEA RS 28 EXT - CS 28 EXT

CS 28 PLUS EXT

CS 32 PLUS EXT

700

420

113

133

85 125 125 85

345

!DEA RS 18-24 - CS 18-24

CS 24 PLUS

700

420

255

G

C

F

117

RC

43 56 60 130 70 61

!DEA RS 24 INC - CS 24 INC

CS 24 PLUS INC

550

13

700

vs

S

8471

RM

C

S

IN CABINET

1140

260

!DEA RS 28-32 - CS 28-32

CS 28-32 PLUS

700

420

205

85 43125 125 85 56 60 130 70 61

225

209

!DEA CS 28 INC

550

C
G

F

G 1/2

M
R

1140

Rc

Sc

Svs

connection

13

700

345

85163

DHW outlet
Gas inlet

G 1/2

G 3/4

Cold water inlet

CH fl ow

G 3/4

CH return

G 3/4

Filling cock

Boiler drain

Safety valve drain

!DEA

NOMINAL HEAT OUTPUT

NOMINAL HEAT INPUT

MINIMUM HEAT OUTPUT

WATER EFFICIENCY at part load (30%)

WATER EFFICIENCY at full load (100%)

FLUE GAS TEMPERATURE tf-ta max.

EFFICIENCY CLASS (Directive 92/42/CE)

WATER PRESSURE IN CH CIRCUIT min./max.

WATER PRESSURE IN DHW CIRCUIT min./max.

D.H.W. production *

ELECTRICAL SUPPLY / power consumption

MAX. ABSORBED POWER

PROTECTION DEGREE

EXPANSION VESSEL TOTAL CAPACITY

NET WEIGHT

GROSS WEIGHT

in continuous, with Δt 25K - mixed

** in cabinet mounting models (Inc)*

AC 23 AR 23 CS 18 RS 18 CS 24

CS 24 EXT
CS 24 INC

22.9 22.9 18.5 18.5 24.6 24.6 28 28 31.6 31.6 22.9 24.7 28.1 32.3

kW

25.5 25.5 20.5 20.5 26.5 26.5 30.1 30.1 34.5 34.5 25.5 26.5 30.1 34.5

kW

9.9 9.9 7.8 7.8 10.1 10.1 10.2 10.2 11.6 11.6 9.9 10.1 10.2 12.2

kW

89.43 89.43 90.23 90.23 90.23 90.23 90.42 90.42 90.42 90.42 89.43 90.43 90.42 90.42

%

89.9 89.9 90.4 90.4 92.92 92.92 93.18 93.18 91.69 91.69 89.8 93.05 93.21 93.5

%

107.5 107.5 121.5 121.5 109 109 103,5 103.5 120.9 120.9 95.5 119.3 96.3 101.4

°C

## ## ## ## ### ### ### ### ## ## ## ### ### ###

0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3 0.5÷3

bar

0.5÷6 - 0.5÷6 - 0.5÷6 - 0.5÷6 - 0.5÷6 - 0.5÷6 0.5÷6 0.5÷6 0.5÷6

bar

14.1 - 10.11 - 13.7 - 16.1 - 17.8 - 14.1 13.2 15.6 18.5

l/min

230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50

V/Hz

85 85 138 138 138 138 138 138 150 150 85 138 138 150

W

X4D X4D X5D X5D X5D X5D X5D X5D X5D X5D X4D X5D X5D X5D

IP

6 6 6 6 6 6 8 8 10 10 6 6 8 10

l

27.1 24.6 29.6 28.1 29.6/44.1* 28.1/42,6* 34.7/49,2* 33.2 35.7 34.7 28.6 30.1/44.6* 35.2 36.2

kg

30 27.6 32.5 31 32.5/47* 31/45.5* 38/52.5* 36.2 39 37.2 31.5 33/47.5* 38.2 39.2

kg

RS 24
RS 24 EXT
RS 24 INC

CS 28
CS 28 INC
CS 28 EXT

RS 28

RS 28 EXT

CS 32 RS 32 AC 23

PLUS

CS 24 PLUS
CS 24 PLUS EXT
CS 24 PLUS INC

CS 28 PLUS

CS 28 PLUS EXT

CS 32 PLUS

CS 32 PLUS EXT

AG S.p.A. 46033 casteldario - mantova - italy - tel. [phone] - fax [phone] - [e-mail] - www.unical.eu

Unical AG declines any liability for the inaccuracies that may appear due to errors in transcription or printing. It also reserves the right to introduce
those modifi cations to its products that it considers necessary or useful, without compromising the essential characteristics of the said products.