Caleffi 269 User Manual

Circulation units
for solar thermal systems, with solar regulator DeltaSol® C+

268-269 series

INSTALLATION AND COMMISSIONING MANUAL

INDEX

28199

Function

Product range

Technical specifications

Characteristic components

Installation
Filling the system

1

2

3

4

5

Function

Circulation units are used on the primary circuit of
solar thermal systems to control the temperature
in the hot water storage. The pump inside the
units is activated by the signal arriving from the
regulator. Moreover, safety and functional devices
for optimum control of the circuit are fitted in the
units.
They are available with flow and return connection
or with return connection only.
Some versions are also complete with the digital
regulator DeltaSol
suitable for the operation and control of 9 different
types of solar thermal systems.

®

C+ for solar thermal systems,

Commissioning

Components

Application diagrams

1

6

7

8

NOTICE
The following instructions must be read and understood before installing, commissioning and
servicing the circulation unit.

The safety symbol is used in this manual to draw attention to the respective safety instructions.
The meaning of this symbol is as follows:

N.B! YOUR SAFETY IS INVOLVED. FAILURE IN FOLLOWING THESE INSTRUCTIONS MAY
RESULT IN INJURIES.

- The circulation unit for solar thermal systems must be installed by a qualified technician in compliance with
relevant national and/or local regulations.

- If the circulation unit is not installed, commissioned and serviced correctly in accordance with the instructions
given in this manual, it might not work properly and could put the user in danger.

- Make sure that all connection fittings are watertight.

- When realising hydraulic connections, make sure that threaded connections are not overstressed mechanically.
Over time, excessive stress may cause breakages with hydraulic leaks and damage to property and/or personal injury.

- Water temperatures exceeding 50°C may cause severe burns.

- When installing, commissioning and servicing, take the necessary precautions so that these temperatures will not
be hazardous for people.

CAUTION: Risk of electric shock. Remove the power supply before carrying out any work.
Failure in following these instructions may result in personal injury or damage to
property.

Product range

Code 268050 Circulation unit with return connection 1–13 l/min size 3/4”
Code 269050 Circulation unit with flow and return connection 1–13 l/min size 3/4”
Code 268250 Circulation unit with return connection, with regulator DeltaSol
Code 269250 Circulation uniti with flow and return connection, with regulator DeltaSol

Package content

The package contains:

Circulation units

• The solar circulation unit complete with front
and rear insulation.

• The wall fixing bracket.

Regulator (only for versions complete with)

• Solar regulator DeltaSol®C+.

• 4 temperature probes.

Accessories:

• Bag of 2 M5 screws, S6 screw anchors and
washers.

®

C+ 1–13 l/min size 3/4”

®

C+ 1–13 l/min size 3/4”

2

Technical specifications

0

0

H (mm w.g.)

G (m

3

/h)

H (kPa)

0

1

2

3

UPS 15-65

6

5

4

3

2

1

60

50

40

30

20

10

0,2 0,4 0,6 0,8 1,0 1,2 1,4

0

0

H (mm w.g.)

G (m

3

/h)

H (kPa)

0

1

2

3

UPS 15-65

6

5

4

3

2

1

60

50

40

30

20

10

0,2 0,4 0,6 0,8 1,0 1,2 1,4

0

P (W)

G (m

3

/h)

20

30

40

50

60

70

80

0,2 0,4 0,6 0,8 1,0 1,2 1,4

1

2

3

UPS 15-65

Materials
Shut-off valves

Body: brass EN 12165 CW617N
Check valve: brass EN 12164 CW614N
Temperature gauge: steel / aluminium

Air separator device

Body: brass EN 12165 CW617N

Instrument holder

Body: brass EN 12165 CW617N
Seals: EPDM
O-Rings: EPDM

Flow meter

Body: brass EN 12165 CW617N
Transparent level gauge: PSU
Flow indicator: brass EN 12164 CW614N
Hydraulic seals: EPDM

Insulation

Material: EPP
Average thickness: 30 mm
Density: 45 kg/m
Working temperature range: -5–120°C
Thermal conductivity: 0,037 W/(m·K) at 10°C
Reaction to fire (UL 94): class HBF

Performance

Medium: water, glycol solutions
Max. percentage of glycol: 50%

Max. working temperature:

- deaerator side flow: 160°C

- pump side return: 110°C
Max. working pressure: 10 bar
Safety relief valve working temperature range: -30–160°C
Safety relief valve setting: 6 bar (for other settings, see 253 series)
Check valve min. opening pressure (∆p): 2 kPa (200 mm w.g.)
Working temperature range of shut-off and check valve: -30–160°C
Working temperature range of flow meter : -10–110°C
Flow rate adjustment: 1–13 l/min
Flow rate indicator accuracy: ±10%

Pressure gauge scale: 0–10 bar
Temperature gauge scale: 0-160°C
Connections: 3/4” F
Hose connection: 3/4” M
Fill/drain connections: with Ø 15 mm hose connection

Grundfos Solar 15-65 pump

Body: cast iron GG 15/20
Electric supply: 230 V - 50 Hz

3

Max. pressure: 10 bar
Max. temperature: 110°C
Protection class: IP 42

Digital regulator

Electric supply: 230 V - 50 Hz
Nominal power consumption: 1,5 VA (12 V (ac))
4 Pt1000 probe inputs
2 relay outputs with semiconductor with contact rating: 1 A

–

2 temperature probes with working range: -50

200°C
Probe cable working temperature range: -50–70°C
2 temperature probes with working range: -50–200°C
Probe cable working temperature range: -50–180°C
Ambient temperature range: 0–40°C
Protection class: IP 20
Dimensions: 172 x 111 x 49 mm

Head available at the circulation unit connections

268 series Flow rate adjustment range 1–13 l/min 269 series Flow rate adjustment range 1–13 l/min

Power consumption

3