Atag A203C Installation & Servicing Instructions

Installation & Servicing instructions ATAG A-Series
23
The appliance must be connected to an earthed socket. this must be visible and within reach.
The following general stipulations also apply:
- No changes may be made to the wiring of the appliance;
- All connections should be designed in accordance with the enclosed regulations.;
The power supply cable for all boilers must be supplied and tted by the installer to
connection terminal X21.
8.1 Room thermostat and controls
The ATAG A has a number of connections possibilities for thermostats and controls:
1. For optimal use of the boilers control ATAG advices:
Position 1 and 2: ATAG Z thermostat;
BrainZ for system boilers, WiZe for combination boilers.
2. As an alternative:
Position 3 and 4: Only battery powered on/off room thermostats (volt free).
The thermostat must have a 2-wire connection. The room thermostat has to be connected
to the terminal block. Use the screw connector that has been connected onto the terminal
block. Lead the cable from the room thermostat along the upper cable hooks of the
housing and the hing bracket.
3. 230Volt: Connect the 230Volt switched live to terminals X21.
Note the polarity!
See next pages for detailed information about the connection possibilities.
For more detailed questions about components that have not been supplied by ATAG,
contact the vendor concerned.
terminal block Figure 8.1.a
1
2
3
4
5
6
7
8
9
10
11
12
FUSE T3,15AH 250V
SL N L
1 2 3 4 5
8G.44.50.00
X10
brown
blue
black
brown
blue
black
To external ATAG
three way valve
230V live input only!
Only Solo boilers
Only Solo boilers*
DHW
ON/OFF
STAT
* Note: - In case of DHW sensor use connection 9-10 of the terminal block
- In case of DHW on/off thermostat use the separate connector (volt free).
Terminal Block A-Series
ATAG Z = only suitable for ATAG Z-thermostat
On/off thermostat (only battery powered) Volt free
n.a. =not applicable
External safety contact
ATAG DHW cylinder sensor (only Solo boilers)*
ATAG Outside sensor1kOhm (ARZ0055U)
DO NOT CONNECT 230 VOLT
See next pages for detailed
information about the
connection possibilities.
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3
5
1
2
4
6

Atag A203C Specifications

General

Type	-
Fuel type	Natural gas
Boiler system	Combi boiler system
Product color	White
Heater location	Indoor
Placement supported	Vertical
Boiler type (NL label)	HR
HR inspection label class	107
Maximum power	20000 W
Minimum power	4400 W
Water flow (60 °C)	6 l/min
Domestic Hot Water (DHW) flow	10.7 l/min

Weight and Dimensions

Depth	395 mm
Width	500 mm
Height	650 mm
Weight	37000 g