CALEFFI GEO 110 Series Leitfaden

Distribution manifold for geothermal systems

156.01

www.caleffi.com

110 series

INSTALLATION AND COMMISSIONING MANUAL

CONTENTS

Warnings

Product range

Technical s ecifications

Characteristic com onents

Package content

Pre-assembled manifold

Right-side version installation

Mounting brackets - manifold

Shut-off valves installation

Branch circuits connection

Closing and o ening

shut-off and regulating valves

Left-side version installation

Modular manifold

Filling the circuit

8-9

Hydraulic test

Commissioning and circuit balancing 11

Shut-off valve fitted for flow rate measuring sensor

with Vortex effect - 111 series 12

Balancing valve 112 series 13

Float flow meter 113 series

Installation in external ocket 14

Accessories 15-16

Function

The CALEFFI GEO®110 series manifolds are used for the

control and distribution of medium in closed circuit

geothermal plants.

In circuits with geothermal heat pump the thermal medium

is generally a mixture of water and anti-freeze fluid since

the temperatures can be extremely low. The components

are made with high-performance materials for this type of

application.

They are supplied pre-assembled, complete with end

fittings and temperature gauges, or in ready-to-assemble

modules.

WARNINGS

These instructions must be read and understood before installing and maintaining the device.

CAUTION! FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN A SAFETY HAZARD!

CAUTION!

YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN INJURY

THE PRODUCT SUPPLIED WITH THIS INSTRUCTION SHEET IS REFERRED TO BELOW AS ‘DEVICE’

The device must be installed, commissioned and maintained by qualified technical personnel in accordance with national

regulations and/or relevant local requirements.

If the device is not installed, commissioned and maintained correctly in accordance with the instructions provided in this manual, then it may

not work properly and may endanger the user.

Clean the pipes of any debris, rust, incrustations, limescale, welding slag and any other contaminants. The hydraulic circuit must be clean.

Make sure that all connecting pipework is watertight.

When connecting water pipes, make sure that threaded connections are not overstressed mechanically. Over time this may result in breakage,

causing water damage and/or personal injury.

Water temperatures higher than 50°C may cause severe burns. When installing, commissioning and servicing the device, take the necessary

precautions so that these temperatures will not be hazardous for people.

In the case of particularly hard or impure water, there must be suitable provision for filtering and treating the water before it enters the device,

in accordance with current legislation. Otherwise the device may be damaged and will not work properly.

For optimal operation, any air in the medium must be removed. For reasons of safety, due to the high compression capacity of air, testing the

entire system, and especially the valves, for watertightness using compressed air is not recommended.

Any use of the device other than its intended use is prohibited.

Any coupling of the device with other system components must be made while taking the operational characteristics of both units into

consideration. An incorrect coupling could compromise the operation of the device and/or system.

The unit must be installed in an environment where any leakage would not cause personal injury or property damage.

Leave this manual as a reference guide for the user. Dispose of the product in compliance with current legislation

Product range

110 series Pre-assembled geothermal manifold DN 50

111 series Ball shut-off valve fitted for integrated flow rate measuring sensor Ø 25, Ø 32, Ø 40

112 series Balancing valve with flow meter Ø 25, Ø 32, Ø 40

113 series Float flow meter Ø 25, Ø 32

130 series Flow rate electronic measuring station for connecting sensor with Vortex effect

Technical specifications

Manifold

Materials

Flow manifold

Body: polymer PA66G30

Return manifold

Body: polymer PA66G30

End fitting

Air vent

Obturator stem: brass EN 12164 CW614N

Spring: stainless steel

Seals: EPDM

Float: PP

Drain/fill cock

Body: brass EN 12165 CW617N

Performance

Medium: water, glycol solutions, salt solutions

Max. percentage of glycol: 50%

Max. working pressure: 6 bar

System test pressure: 10 bar

Working temperature range: -10–60°C

Ambient temperature range: -20–60°C

Main connections: 1 1/4”

Outlets: 42 p. 2.5 TR

Centre distance: 100 mm

Technical specifications

Shut-off and balancing devices

Materials

Shut-off valve

Body: brass EN 12165 CW617N

Polymer cap: PA66G30

Seal ring: stainless steel

Balancing valve

Body: brass EN 12165 CW617N

Ball: brass EN 12164 CW614N

Ball control stem: brass EN 12164 CW614N

Ball seal seat: PTFE

Flow meter

Body: brass EN 12165 CW617N

Headwork: brass EN 12164 CW614N

Obturator stem: brass EN 12164 CW614N

Springs: stainless steel

Seals: EPDM

Flow meter float: PSU

Indicator cover: PSU

Float flow meter

Body: brass EN 12165 CW617N

Ball: brass EN 12164 CW614N

Ball control stem: brass EN 12164 CW614N

Ball seal seat: PTFE

Float: brass EN 12165 CW614N

Seals: EPDM

Graduated scale support: PSU

Accuracy: 10%

Outlet connections with mechanical seal for 111 series shut-off

valves, 112 series balancing valves and 113 series flow meters.

Characteristic components

Pre-assembled unit complete with:

1) Polymer manifold complete with sealing gasket

2) Brass end fitting

3) Air vent

4) Temperature gauge with pocket

5) Fill/drain cock

6) Closure plate

7) Pair of stainless steel brackets

) Stainless steel rods including screws and bolts for seal and clamping

Package content

The package contains:

- modules for flow and return manifold

- stainless steel rods including screws and bolts for clamping seal

- end fitting and closure plates with corresponding insulation

- 2 automatic air vents

- 2 fill/drain cocks

- 2 temperature gauges with pockets

- pair of stainless steel brackets with corresponding wall anchors for wall fixing

- assembly instructions

- set of labels for direction of flow and circuit identification

Maintenance

DO NOT USE CHEMICALS

TO CLEAN THE MANIFOLD

Right-side version installation

1) Install the temperature gauge and the air vent. The end fitting is

supplied with only the fill/drain cock already mounted. Unfasten

the insulation by means of the tear-off closure (a1) and make a

hole through the embossed signs on the inner side (b1).

2) Unscrew the cap from the front connection and screw down the

pocket for the temperature gauge, tightening it to the end stop.

3) Close the insulation and fit the air vent in the upper connection.

2) Thread the furnished nuts onto the steel bars extending from the

end cap. Do not tighten them to the end stop since they are

used as locks to connect the manifold to the brackets.

3) Connect the manifolds to the brackets using the quick coupling,

before mounting the brackets on the wall. If necessary the

manifolds can be connected without the insulation inserted on

the end fitting, so that the screws for connecting the manifold to

the brackets remain visible.

PRE-ASSEMBLED MANIFOLD

The pre-assembled manifold is supplied in the right-side version

but can be fitted with the main connections on the left side

depending on the heat pump position compared to the probes.

Mounting brackets - manifold

1) Hand thread the furnished screws several turns into the rear

threads on the end ﬁtting: do not tighten them to the end stop

since they are the anchor point between the manifold and the

brackets.

right-side version

left-side version

a1 a2

b1 B2

Shut-off valves installation

1) Uncouple the return manifold (the one with medium flowing from

the heat pump to the geothermal probes) and connect the

shut-off valve. Position the seal and thread the nut fully onto the

manifold outlet.

) After having attached the manifold to the brackets, fully tighten

the nuts on the end cap and closure plate. If necessary this

operation can be carried out without the insulation inserted on

the end fitting.

4) Position the manifold and mark the wall anchor holes on the wall.

Install the wall anchors and attach the brackets to the wall using

the mounting slots. If more convenient, the brackets can be

installed on the wall ﬁrst, then connect the manifold to the

brackets.

2) Uncouple the flow manifold (the one with medium flowing from

the geothermal probes to the heat pump) and connect the

regulating valves. The manifold is fitted for use with three

different circuit balancing systems.

6) Determine the manifolds ﬂow direction and attach the labels

supplied with the manifold. This will help with the installation of

the circuits and the respective regulating valves. The

recommended flow direction is shown in the following figure:

111 series

Ball shut-off valve, with

insulation

112 series

Balancing valve with flow

meter, with insulation

113 series

Float flow meter, with

insulation

Branch circuits connection

1) With the manifold mounted on the brackets, prepare the pipe for

the outlets and cut it to size for connecting to the fitting. Both the

shut-off and balancing valves are equipped with DECA fitting for

attaching to the geothermal pipe.

Helpful suggestions for installation

Pipe preparation.

Pipe connection

Cut pipe square Do not cut at an

angle

Remove burrs from

the outer surface

Loosen the locking

nut of the DECA

fitting without taking it

Insert the pipe to the

end stop

Snugly tighten the

locking nut

Do not disassemble the fitting

and then put the elements on the

pipe.

3) In all three situations, simply position the seal and fully tighten

the nut on the manifold outlet.

2) To make it easier to insert the pipe into the DECA fitting,

uncouple the shut-off/balancing valve from the manifold, couple

the pipe to the fitting and then reconnect the valve to the

manifold, ensuring that the sealing gasket is correctly

positioned.

3) Stick the circuit label beside the appropriate outlet. This can be

very useful for system maintenance or leakages.

4) Repeat the above steps for all the pipes, paying attention to the

bending of the pipes in the area under the manifolds.

Closing and opening shut-off valves

The control lever opens

and closes the ball

valve. The lever must be

positioned parallel with

the bevelled edges of

the closure cap, aligned

with the slots so as to

correctly guide the cap.

Closing and opening regulating valves

On the float flow meter (113 series) and balancing valve

(112 series) there is a slot for the complete opening or closing of

the valve. A slot on the obturator stem indicates the status of the

valve. When the control stem is turned clockwise 90° and the slot is

perpendicular to the valve axis, this indicates that the valve isfully

closed (A); when the stem is turned 90° anti-clockwise to the end

stop and the slot is parallel with the valve axis, this indicates that

the valve isfully open (B).

When the control lever is in the vertical position, the ball is open and

the medium is flowing (A). When the lever is in the horizontal

position the ball is closed: the seats ensure a tight seal and impede

the flow of medium (B).

) Connect main pipes.

It is advisable to insert a ball valve between the manifold and the

main pipe so that the geothermal circuits can be excluded

easily.

6) When the manifold is fully installed, check that the insulations

are closed and insert the temperature gauges into the pockets

mounted previously. Tighten the screw on the pockets to keep

the temperature gauge in position.

A B

1) Remove the insulation from the manifold.

2) Undo the four nuts and take out the closure plate and the seal.

3) Extract the modules from the threaded bars.

4) Undo the drain and the closure cap.

Left-side version installation

The standard right-side version of the manifold can be installed in

the left-side version by proceeding as follows:

) Turn the end fitting with

steel rods upside down

1 0°.

6) Rotate the end fitting

1 0°

lengthwise so that the front

connection is positioned as

shown in the following

figure.

NOTE: With a higher number of outlets it may be necessary to

repeat the tightening sequence several times.

To mount the manifold on the brackets follow the instructions under

“Mounting brackets – manifold”.

7) Install the drain fully into the lower connection and the pocket

for the temperature gauge into the front connection.

8) Reassemble the manifold by alternately inserting a seal and a

module, using the studs as a reference: the studs on each

module should be aligned with the end cap.

9) After having inserted the same number of modules to match the

number of outlets, assemble the manifold with seal, closure

plate with grooves facing the inside, and the tightening nuts.

10) To tighten the nuts, follow

the adjustment diagram

shown opposite with the

following procedure:

- tighten with torque wrench

to 5 N·m.

- retighten with torque wrench

to 5 N·m.

1) Fully tighten the drain cock on the lower thread of the end cap

and the pocket for the temperature gauge on the front thread.

2) Tighten the steel rods to the end stop.

6) Hand thread the furnished screws several turns into the rear

threads: do not tighten them to the end stop since they are the

anchor point between the manifold and the brackets.

3) Insert a seal and a manifold body on the rods, using the studs

as a reference: the studs on each module should be aligned

with the end cap.

4) After having inserted the same number of modules to match the

number of outlets, assemble the manifold with seal, closure

plate with grooves facing the inside, and the tightening nuts.

MODULAR MANIFOLD

The distribution manifold has been designed so that it is easy to

mount on a bench.

Since the manifold is reversible, it can be mounted with the main

connections on the right or left depending on the heat pump

position.

The following instructions refer to the manifold with right-side

connections, although it is also possible to mount the left-side

version following the same procedure.

7) Close the insulation and fit the air vent snugly into the upper

connection.

NOTE: With a higher number of outlets it may be necessary to

repeat the tightening sequence several times.

) To tighten the nuts follow the

adjustment diagram shown

opposite with the following

procedure:

- tighten with torque wrench

to 5 N·m.

- retighten with torque wrench

to 5 N·m.

right-side version left-side version

Filling the circuits

1) Close all the outlets to the geothermal circuits using the shut-off

and regulating valves.

2) Open the fill and drain cocks using the specific cap and make

sure that the shut-off valves are closed.

) When filling is complete, close the valves in the first circuit and

repeat the same sequence of operations for all the other

circuits.

3) Connect the system testing pump to the fill cock on the flow

manifold and a drain pipe to the cock on the return manifold.

Direct the drain pipe into a container if the medium in the

system contains glycol.

4) Fill the first circuit by opening the corresponding valves,

making sure that all the air in the circuit is removed. Check that

the cap on the air vent is open.

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