Configuration Of The Main Block Diagrams; Configuration Of The Primary System - Riello Condexa PRO Series Installation, Technical And Maintenance Manual

CONFIGURATION OF THE MAIN BLOCK DIAGRAMS

3 CONFIGURATION OF THE MAIN BLOCK DIAGRAMS
9
The DHW and heating circuits must be completed with ex-
pansion vessels of a suitable capacity and correctly sized
relief valves. The discharge of the relief valves and the ap-
pliances must be connected to an evacuation and collection
system (see paragraph Neutralization of the condensate).
9
The installer is responsible for selecting and installing the
system components and must work in full compliance with
correct technical regulations and legislation in force.
9
Special supply/refill water must be conditioned using suita-
ble treatment systems.
9
For the electrical connections, use H05-VV-F power cables
with a minimum cross-section of 1.5 mm
terminal ferrules. For the low voltage connections, use H05-
VV-F power cables with a minimum cross-section of be-
tween 0.5 and 1 mm , complete with terminal ferrules.
2
9
For the connection of the devices connected to the jig
(pumps, circulators and diverting / mixing valves) use inter-
posed relays unless the maximum absorption of all compo-
nents connected to the board (including the module circu-
lator) is less than or equal to 1.5 A. Relays sizing lays on the
installer depending on the type of connected device.
0
It is prohibited to operate the thermal module without wa-
ter.
3.1

Configuration of the primary system

The basic cascade configuration consists of at least two thermal
modules, One is assigned "Managing" role and the others are
assigned the "Depending" role.
The cascade of thermal modules can be seen as the primary sys-
tem of a generation system. This configuration could be ideal for
replacing one or more larger generators in an existing system if
system reliability and efficiency is to be increased.
In order for cascade operation to be possible, the "Managing"
thermal module must be connected to the primary sensor (SS)
at least, available as an accessory.
The primary sensor is required in order to manage the cascade
setpoint and is essential for managing the thermal modules as
a single generator.
TA / SE / 0-10V
DEPENDING MANAGING
PRIMARY
, complete with
2
SS
54
Operation of the primary system can be:
− Mode 0 - With fixed setpoint.
This configuration requires the connection of an
ambient thermostat or heat request contact (TA).
− Mode 1 - In climatic mode with variable setpoint based
on the outdoor temperature.
This configuration requires the connection of an
ambient thermostat or heat request contact (TA) and an
external sensor (SE), available as an accessory.
− Mode 2 - In climatic mode with intensity controlled by
the ambient thermostat/heat request signal and variable
setpoint based on the outdoor temperature.
This configuration requires the connection of an
ambient thermostat or heat request contact (TA) and an
external sensor (SE), available as an accessory.
− Mode 3 - With fixed setpoint with intensity controlled by
the ambient thermostat/heat request signal.
This configuration requires the connection of an
ambient thermostat or heat request contact (TA).
− Mode 4 - With delivery setpoint adjustment on the basis
of the analogue input 0-10V.
This configuration requires an external device (for
example, PLC of the central heating plant) able to
generate this signal connected to the analogue input
0-10 V.
The functions described can be set using the parameterization
carried out on the "Managing" thermal module. This is de-
scribed in the manual of the individual thermal modules in the
paragraph "Setting the heating system".
The electrical and hydraulic connections of the primary system
are to be completed selecting from:
− Use of the thermal module circulator (as standard in Con-
dexa PRO 35 P ÷ Condexa PRO 70 P and available as an
accessory for Condexa PRO 90 ÷ Condexa PRO 135 models).
− Use of the system circulator (PS) and two-way valves (V1)
for each thermal module (these devices are available as
accessories).