Hydraulic Connection Of The Heating Circuit; Connection Of The Water Circuit For Domestic Use; Connecting The Expansion Vessel - REMEHA CALORA TOWER GAS 15S EX Installation And Service Manual

Floor-standing high efficiency gas boiler

Table of Contents

CALORA TOWER GAS 15S EX CALORA TOWER GAS 25S EX

CALORA TOWER GAS 35S EX

Initial pressure of the

expansion vessel

0.5 bar

1 bar

1.5 bar

(1) Factory configuration

22/04/2016 - 300026141-001-07

5.5.2.

1. Connect the heating water outlet pipe to the heating flow

connection.

2. Connect the heating water return pipe to the heating return

connection.

3. Install a filling and drainage valve on the installation for filling and

draining the boiler.

¼If using thermostatic valves, see chapter: "Connecting the

M002524-A

expansion vessel", page 29

5.5.3.

¼If need be, refer to the DHW tank's installation, user and

maintenance manual.

5.5.4.

The boiler is fitted as standard with an 12-litre expansion vessel.

If the water volume is greater than 225 litres or the static height of the

system exceeds 5 metres, an additional expansion vessel must be

fitted. Refer to the table below to determine the expansion vessel

required for the installation.

Conditions of validity of the table:

4 3-bar safety valve

4 Average water temperature: 70 °C

Flow temperature: 80 °C

Return temperature: 60 °C

4 The filling pressure in the system is lower than or equal to the initial

pressure in the expansion vessel

Volume of the expansion vessel depending on the volume of the installation (in litres)

100

125

150

4,8

6,0

7,2

8,0

10,0

(1)

12,0

13,3

16,6

20,0