Wilo Varios PICO-STG Manuel utilisateur

4 235 775-Ed.02 / 2021-03

Willo-Varios PICO-STG

Pioneering for You

en Installation and operating instructions

Fig. 1:

12 11

Fig. 2:

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Fig. 5a:

Fig. 5b:

PE NL

Fig. 5c:

Fig. 5d:

Fig. 5e:

Fig. 5f:

Fig. 6:

Installation and operating instructions Wilo-Varios PICO-STG 7

1General

About these

instructions

These installation and operating instructions are an

integral part of the product. Read these instructions

before commencing work and keep them in an accessi-

ble place at all times.

Strict adherence to these instructions is a requirement

for intended use and correctly operating the product. All

specifications and markings on the product must be

observed.

The language of the original operating instructions is

German. All other languages of these instructions are

translations of the original operating instructions.

2Safety

This section contains basic information which must be

adhered to during installation, operation and mainte-

nance. Additionally, the instructions and safety instruc-

tions in the other sections must be followed.

Failure to follow the installation and operating instruc-

tions will result in the risk of injury to persons and dam-

age to the environment and the product. This will result

in the loss of any claims for damages.

Failure to follow the instructions will, for example, result

in the following risks:

• Injury to persons from electrical, mechanical and bac-

teriological factors as well as electromagnetic fields

• Environmental damage from leakage of hazardous

substances

• Property damage

• Failure of important functions of the product

Identification of

safety instructions

These installation and operating instructions set out

safety instructions for preventing personal injury and

damage to property, which are displayed in different

ways:

• Safety instructions relating to personal injury start

with a signal word and are preceded by a corre-

sponding symbol.

8WILO SE 03/2021

• Safety instructions relating to property damage start

with a signal word and are displayed

without

a symbol.

Signal words DANGER!

Failure to observe safety instructions will result in seri-

ous injury or death!

WARNING!

Failure to follow instructions can lead to (serious) injury!

CAUTION!

Failure to follow instructions can lead to property dam-

age and possible total loss.

NOTICE

Useful information on handling the product

Symbols These instructions use the following symbols:

Personnel

qualifications

Personnel must:

• Be instructed about locally applicable regulations

governing accident prevention.

• Have read and understood the installation and oper-

ating instructions.

Personnel must have the following qualifications.

• Electrical work must be carried out by a qualified elec-

trician (in accordance with EN 50110-1).

Danger due to electrical voltage

General danger symbol

Warning of hot surfaces/fluids

Warning of magnetic fields

Notices

Installation and operating instructions Wilo-Varios PICO-STG 9

• Installation/dismantling must be carried out by a

qualified technician who is trained in the use of the

necessary tools and fixation materials.

• The product must be operated by persons who are

instructed on how the complete system functions.

Definition of “qualified electrician”

A qualified electrician is a person with appropriate techni

cal training, knowledge and experience who can identify

and prevent electrical hazards.

Electrical work • Electrical work must be performed by a qualified elec-

trician.

• Nationally applicable guidelines, standards and regu-

lations as well as specifications issued by the local

energy supply companies for connection to the local

power supply system must be observed.

• Before commencing work, disconnect the product

from the mains and safeguard it from being switched

on again.

• The connection must be protected by means of a

residual-current device (RCD).

• The product must be earthed.

• Have defective cables replaced immediately by a

qualified electrician.

• Never open the control module and never remove

control elements.

Operator

responsibilities

• Have all work carried out by qualified personnel only.

• Ensure on-site guard against hot components and

electrical hazards.

• Have defective gaskets and connection pipes

replaced.

This device can be used by children from 8 years of age as

well as by people with reduced physical, sensory or mental

capacities or lack of experience and knowledge if they are

supervised or instructed in the safe use of the device and

they understand the dangers that can occur. Children are

not allowed to play with the device. Cleaning and user

maintenance is not allowed to be carried out by children

without supervision.

10 WILO SE 03/2021

3 Product description and function

Overview Wilo-Varios PICO-STG (Fig. 1)

1 Pump housing with screwed connections

2 Glandless motor

3 Condensate drain openings

(4x around circumference)

4Housing screws

5 Control module

6iPWM signal cable connection

7 Rating plate

8 Operating buttons for pump adjustment

9 Fault signal LED

10 Display of control mode

11 Display of iPWM signal type

12 Display of set pump curve (I, II, III)

13 Mains connection: 3-pin plug connection

14 Wilo-Connector

15 Connection cable: 3-pin pump plug and

Wilo-Connector connection

Function High-efficiency circulator for hot-water heating sys-

tems with integrated differential pressure control. Con-

trol mode and delivery head (differential pressure) are

adjustable. The differential pressure is controlled via the

pump speed.

Type key

Example: Wilo-Varios PICO-STG 25/1-7-130

Varios PICO High-efficiency circulator

STG Compatible with heating, solar and geothermal application

25 Screwed connection DN 25 (Rp 1)

1-7 1 = minimum delivery head in m (adjustable down to 0.5 m)

7 = maximum delivery head in m at Q = 0 m³/h

130 Port-to-port length: 130 mm or 180 mm

Installation and operating instructions Wilo-Varios PICO-STG 11

Technical data

Indicator lights

(LEDs)

• Display of selected control mode Δp-v, Δp-c,

constant speed and external speed control

• Display of selected pump curve (I, II, III) or iPWM signal

type (iPWM GT, iPWM ST) within the control mode.

• LED indicator combinations during pump venting

function, manual restart and LED coding within the

sync function.

•Signal display

• LED lights up green during normal operation.

• LED flashes red or green or lights up permanently

red in the case of a fault signal.

• LED lights up red in the event of incorrect LED cod-

ing after ending the sync function.

Connection voltage 1 ~ 230 V ± 10%, 50/60 Hz

Protection class IP See rating plate (7)

Energy efficiency index EEI See rating plate (7)

Fluid temperatures at max. ambient

temperature +40 °C -20 °C to +95 °C (Heating/GT)

-10 °C to +110 °C (ST)

Fluid temperatures at max. ambient

temperature +70 °C +70 °C

Permitted ambient temperature -10 °C to +70 °C

Max. operating pressure 10 bar (1000 kPa)

Minimum inlet pressure

at +95 °C/+110 °C 0.3 bar/1.0 bar (30 kPa/100 kPa)

12 WILO SE 03/2021

Operating buttons

Upper operating button

Press

•Select control mode.

• Activate the pump venting function (press and hold).

• Select the LED during the sync function.

Lower operating button

Press

• Selection of pump curve (I, II, III) or iPWM signal

(iPWM GT, iPWM ST) within the control mode.

• Activate manual restart (press and hold).

• Activate or deactivate selected LED during the sync

function.

3.1 Control modes and functions

Variable

differential

pressure Δp-v

(I, II, III)

Recommended for two-pipe heating systems with radi-

ators to reduce the flow noise at thermostatic valves.

The pump reduces the delivery head to half in the case of

decreasing volume flow in the pipe network.

Electrical energy saving by adjusting the delivery head to

the volume flow requirement and lower flow rates.

There are three pre-defined pump curves (I, II, III) to

choose from.

III

H/m

Q/m³/h

NOTICE

Factory setting: Δp-v, pump curve II

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