Flexit L12 X, Operating Instructions Manual

9

5  Plumbing Works

All plumbing work must be performed by 

an authorised plumber.

5.1   technical Data for Water Batteries

Unit

Water battery- 

connection

Pipe 

connection

L30

R 1/2"

cu Ø12

L40

R 1/2"

cu Ø12

For further information, please refer to the special 

estimation program for calculation of technical data 

for the water battery (www.flexit.com).

5.2   Possible Valve types

3-way valve, type Honeywell, for capacity:

1.6 kvs art. no.  56232

2.5 kvs art. no.  57228

4.0 kvs art. no.  56283

2-way valve, type Honeywell, for capacity:

1.6 kvs art. no.  56432

2.5 kvs art. no.  56433

4.0 kvs art. no.  56434

5.3   Possible Valve Motor

It is necessary to use a valve motor that is controlled 

by 0-10 V, where 10 V=100 % open.

Valve motor article number: 56234.

5.4   Connections

Before connecting the water battery, it 

is necessary to check that the inspection 

doors are accessible and there is space 

enough to change the water battery.

Use the recommended connection (see Fig. 10) unless 

specified otherwise. The water supply must be at the 

bottom of the water battery - the return must be on 

the top.

Place the adjustment valve as close to

the unit as 

possible. (Please note that many valve motors can go 

in both directions and this can be set on the motor. 

Set it so that the valve opens on an increasing 0-10 V 

signal.)

If you use a water battery that has not had glycol 

(or another antifreeze) added, the unit should be in 

a heated room on account of the risk of frost in the 

battery. Install air dampers with spring-loaded return 

for outdoor air. Place the unit close to a gully to avoid 

damage caused by any water leaks.

Install pipe routes to the water battery so that there is 

free access to the motor and recovery system.

Remember vibration damping for water pipes.

You can see the location of pipes out of the unit in the 

dimensioned drawings in Chap. 2.3.

Install the water battery so that there is 

free access to the motor and exchanger 

cassette.

Pipe routes for water pipes: 

Remember vibration damping for water 

pipes.

Fig. 10   Recommended connection

Pump

Throttle valve

3-way valve

Hot water from 

boiler system

Water battery in the 

supply air system