ETNA EPH B-M46 Series, Installation, Operation, Service, And Parts Manual

4

08. Start-Up

Expansion vessels are delivered   at 4 bars, with pre-
charged  factory settings. The pre-charged pressure in 
the tank must be adjusted before start-up so that it will 
be slightly below the cut-in ( starting ) pressure of the 
pump(s). Practical recommended pressure level can 
be determined as %10 lower than the cut-in ( starting 
) pressure of tank.

08.1 Electrical Connection

The booster sets use single or three-phase motors 

sized and powered according to European standards. 
The booster set must be connected by a qualified 
electrician in compliance with current local electrical 
regulations. Ensure that the mains voltage corresponds 
to the voltage specified on the booster set rating plate

Before start-up, the grounding of the booster shall be 
maintained. The current leakage relay (30 mA) shall 
be installed in the pump controller before the energy 
supply.
a) Single pump booster sets are supplied as standard 
with a thermal magnetic protection switch and float 
switch for protection against dry running.
b) Multi-pump booster sets are supplied with control 
panels with, main on-off switch, fuse carrier and fuses, 
power contactors, overload relays, phase protection 
relays over 7,5 KW, electronic change over control 
board, float switch for protection against dry running, 
automatic-manual switch for each pump power on, 
running, reset and no water indicating (warning) lights.

09. Pre-Operation Test

Fill the suction pipe and the pumps with water to test 
before the actual operation. Assemble the pipes as 
shown in figures 4 and 5 and connect the float switch.

Correct Connection
A -

 Eccentric reductions

B - 

Positive gradient

C - 

Good immersion

D - 

Large bends

E - 

Suction pipe diameter

≥

Pump port diameter

F - 

Difference in lift level referred to pump and   

installation. In optimum conditions the          

difference in level should not exceed 5-6 m.

G - 

The pipe should not weigh on the pump

but on independent supports.

A

3

1

4

2

D

G

F

C

E

B

Installation

Incorrect Connection
1 - 

Sharp bend = High head loss

2 - 

Insufficient immersion = Air

3 - 

Negative gradient = Air pockets

4 - 

Pipe diameter < Pump port

Installation

Perpendicular flap or check valve

Correct Connection
A -

 Eccentric reductions

B - 

Positive gradient

C - 

Good immersion

D - 

Large bends

E - 

Suction pipe diameter

≥

Pump port diameter

F - 

Difference in lift level referred to pump and   

installation. In optimum conditions the          

difference in level should not exceed 5-6 m.

G - 

The pipe should not weigh on the pump

but on independent supports.

A

3

1

4

2

D

G

F

C

E

B

Installation

Incorrect Connection
1 - 

Sharp bend = High head loss

2 - 

Insufficient immersion = Air

3 - 

Negative gradient = Air pockets

4 - 

Pipe diameter < Pump port

Installation

Perpendicular flap or check valve

1 - Valve

2- Check valve

3- Float valve

4- Float switch

5- Service tap

6- Upright valve

7- Strainer

8- Water Tank

1

1

2

2

5

3

4

* The suction pipe should be at least 15 cm above the tank bottom.

*

To the building

Mains

Operating level

Stoppage

Level

Starting-Stop

Level Setting

7

8

Important:

Check valve should not be installed on 

the delivery line of the booster sets 

with negative suction level. The upright 

valve installed on suction also acts like 

a check valve.

# A check valve should not be installed on 

the delivery line of the plumbing either.

To the building

1

1

2

Mains

6

1

3

4

7

Figure 2

Figure 3

Figure 4