Ball Valve Positions; Draining The System; Non-Return Valve; Flowmeter - CALPAK FlowSol S Installation

4

Ball valve positions

Ball valve closed, no fluid flow
Ball valve open, fluid flow in both
directions possible
Ball valve in operating position, fluid
flow in flow direction only
5

Draining the system

Î Open the non-return valve inside the ball valve
(4; see also figure to the left).
Î Open the air vent at the highest point of the
system (above the collectors).
Î Open the drain valve.
6

Non-return valve

Î The non-return valve of the pump station is in-
tegrated into the ball valve above the circulating
pump. It has an opening pressure of 20 mbar.
Î In order to completely drain the system, the non-
return valve has to be opened. For this purpose,
turn the handle of the ball valve by 45°. The ball
in the ball valve then opens the non-return valve.
Î For normal system operation, open the ball valve
completely.
Î In order to avoid in-pipe-circulation, the flow line
has to be equipped with a thermosiphon or an
additional non-return valve.
6
7

Flowmeter

The flowmeter measures and indicates the flow rate
with a range of 1-10 l/min. For the device to function
faultlessly, the system must be flushed and free of grit.
Read the flow rate from the upper edge of the float.
8

Maintenance

In the case of maintenance (such as a replacement of
the pump) proceed as follows:
Î Close the ball valve (4).
Î Turn the slot of the flowmeter spindle by 90°
anti-clockwise (see figure below).
The heat transfer fluid can now be drained from the
pump. If necessary, unscrew the union nut on the pres-
sure side.
Î Now dismount the pump.
9

Safety devices

The pump station is equipped with a diaphragm safety
valve which corresponds to the relevant directives
and regulations. For installation and operation, please
pay attention to the following advice:
• The safety valve has to be easily accessible. The ef-
ficiency of the valve must not be influenced or disa-
bled by barriers!
• The strainer or other restriction devices must not
be mounted between collector (-field) and safety
valve!
• The diameter of the discharge pipe must cor-
respond to the diameter of the valve outlet; the
maximum length must not exceed 2 m; more than
2 bends are inadmissible. When these values are
exceeded, you have to install a discharge pipe with
larger dimensions. Do not use more than 3 bends
and pipes longer than 4 m!
• If the discharge pipe leads into a drain pipe with a
funnel, the diameter of the drain pipe has to be at
least twice as large as the valve inlet. The opening
of the discharge pipe must be inclined downwards.
It must be routed such that the opening can be seen
but does not present any risk to a person standing
or passing by.
• We recommend placing a container below the dis-
charge pipe. If the safety valve opens, the fluid will
be collected and can be refilled into the system
when the pressure is too low.