27.08.2018
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EVO S -
Installation and Servicing
Boiler cascade
2 regulated circuits per boiler and production of DHW
Diagram
VF11
page 1 / 9
A. HYDRAULIC DIAGRAM
figure 32 -
VF11 diagram
B. REGULATION ACCESSORY REQUIRED
Quantity
Appliance reference
Order No.
Communication kit
2 (3)
OCI 345
219285
Extension module kit (delivered with a
network sensor QAD 36)
2
AGU 2.550
219483
DHW sensor kit
1
QAZ 36
219481
Output sensor kit
1
QAC 34
219479
Network sensor kit
1
QAD 36
219487
The master NAVISTEM B3000 controls the cascade of boilers on the basis of the outlet temperature
measured by the sensor QAD 36. Each NAVISTEM B3000 controls the charge pump of its own generator.
The boilers operate with a variable outlet temperature according to the outdoor temperature measured by
the sensor QAC 34, temperature adjusted according to the most demanding circuit, without parallel offset,
without a low temperature limit and with a weekly programme.
The heating programme is per week. Each AGU 2.550 module controls a regulated circuit with a 3-way
valve.
