Operating Instructions and Installation Instructions

VARINO GRANDE 350 - 600

We reserve the right to make changes to dimensions and construction 11 Edition 10.07.2015

5. Description of the boiler control panel

The control panel of the VARINO GRANDE condensing unit consists of the two systems burner management

and installation control.

5.1. Burner management:

The functions of a traditional heating unit are integrated in the expanded functions of the burner manager. The

burner manager is a micro-processor controlled electronics device which records and controls all data on the

boiler/burner. All safety-relevant measurements are recorded and monitored. The burner manager is linked with

an oxygen sensor which measures the oxygen partial pressure (0

content) in the waste gas. If a deviation from

the desired value is measured, the electronics corrects the quantity of inlet air to the combustion process via the

speed-controlled combustion air fan.

Key: Control panel for condensing unit

1 Burner switch ON/OFF

2 Fuse F1, 10 A burner / boiler

3 Fuse F2, 6.3 A heating controller (optional)

4 STB safety temperature limit device

5 STB 2 waste gas STB safety temperature limit device (optional)

6 Fault lamp, external faults

7 TÜV button

8 Release key of the sealing control (optional)

9 Fault lamp, sealing control (optional)

10 Operator station with display

11 DIN standard cut-out for accommodating an Ygnis heating controller (optional)

5.2. Governor types

A wide range of system controls has been designated for the VARINO GRANDE condensing unit.

Based on the modular design, the planner is in a position to install the condensing unit specifically for the

installation with the appropriate type of control.

The modern micro-processor controlled Ygnis heating controller enables an optimum heating circuit and hot

water control.

RDO 243 governor

Heating governor providing regulation for 1 mixing circuit and automatic water loading device.

RDO 383 governor

Heating and master cascade governor for 2 mixing circuits, 1 automatic water loading device and DHW

circulation pump, can be added for use with 6 other mixing circuits by means of additional modules RZM 510,

with three other automatic water loading devices by means of additional modules RZM 515 and the cascade

control with three other boilers by means of additional modules RZM 530.