Robur Caldaria 100.2 Condensing+ export, Installation, Use And Maintenance Manual

Electrical installer

32

4

Figure 4.6  

 Connection of OSND009 outdoor probe to Caldaria 55.1 and 
100.2

SE   Outdoor probe OSND009

SPM   Male  plug

SE

N

L

T

S3

B4

T2 T1

SPM

4.3.5 

   Connection of OT/Modbus interface

Refer to the documentation supplied with the ODSP040 

OT/Modbus interface.

4.4 

 OPERATION  VIA  CENTRALISED 

EXTERNAL REQUEST

The appliance's operation can also be controlled via a central-

ized external request. This request, activated for example by a 

programmable timer or another system, can be used for the cen-

tralised activation or deactivation of specific services, even on 

several boilers.

This feature does not replace the external request control de-

tailed in Paragraph 4.3 

p.  30 but is additional. The purpose of 

the external request is to manage the switching on and off of 

the individual boiler, typically based on the temperature in the 

reference room.

The purpose of centralized external request is instead to have 

a generic enable signal for specific services on all boilers con-

nected to it. In the absence of the signal (CS contact open) the 

boilers will be enabled for the operation of the specific service 

(and will be activated or not based on the settings of the specific 

control device). In the presence of the signal (CS contact closed) 

the boilers will be disabled on the specific service, whatever the 

environmental conditions.

When closing the CS contact, one of the following functions can 

be excluded:

▶

DHW request (Caldaria 35 and Caldaria 55.1 only): if the val-

ue of parameter P01 is set to 0 and the value of parameter 

P17 is set to 1 (Paragraph 5.4 

p.  35), when closing the CS 

contact the activation request for DHW is disabled.

▶

DHW buffer tank charging: if the value of parameter P01 is 

set to 2 or 3 (Caldaria 35 and Caldaria 55.1) or 0 (Caldaria 

100.2) (Paragraph 5.4 

p. 35), when the CS contact is closed, 

DHW buffer tank charging is disabled.

▶

Heating request: If the value of parameter P01 is set to 

5 (Caldaria 35 and Caldaria 55.1) or 1 (Caldaria 100.2) 

(Paragraph 5.4 

p. 35), when closing the CS contact the ac-

tivation request for heating is disabled.

For the electrical connection of the centralized external request, 

follow the instructions below:

▶

For Caldaria 35: connect the centralized external request to 

the CS terminal block on the left side of the control panel 

(Figure 1.18 

p. 16).

▶

For Caldaria 55.1 and Caldaria 100.2: connect the central-

ized external request to the CS terminal block located in-

side the MP panel terminal block (Figures 1.19 

p.  17 and 

1.20 

p. 18).

In the case of centralized management of several boilers, 

each request must be connected through the interposi-

tion of a relay.

For further information on the operation and use of 

boilers in this mode, please contact the Robur technical 

service.

4.5 

 DHW  PRODUCTION

The Caldaria Con export appliances can manage au-

tonomously the production of buffer tank DHW, through the 

control of an external 3-way diverter valve directly connected to 

the boiler itself that feeds the coil of a DHW buffer tank.

To control the temperature in the DHW buffer tank, a tempera-

ture probe, available as OSND011 optional, can be used, or al-

ternatively a thermostat in the DHW buffer tank, appropriately 

set. These devices must also be connected directly to the boiler.

The parameters for DHW production management will be set 

directly on the control panel on the appliance.

4.5.1 

   Connection of DHW diverter valve

The DHW diverter valve must be connected to terminals 8-9-

10 (connector M4) of the electronic board (master board for 

Caldaria 100.2) (Figure 4.7 

p. 33).

▶

neutral (common) on contact 9

▶

phase (DHW position) on contact 8

▶

phase (heating position) on contact 10

The valve is powered at 230 V AC directly from the electronic 

board of the boiler.

The valve must be of the type with supply (neutral) always pres-

ent and position piloted by the phase present on the contact 

corresponding to the position to be taken.

The default position is for DHW (phase on contact 8), and is 

changed when there is a heating request (phase on contact 10).

The maximum applicable resistive load is 2 A.

The cable may not be longer than 50 metres, with a minimum 

cable cross-section of 0,5 mm

2

.