Grundfos ALPHA+ Series User manual

GRUNDFOS ALPHA+

GRUNDFOS INSTRUCTIONS

Installation and operating instructions

GRUNDFOS ALPHA+

Installation and operating instructions 4

Montage- und Betriebsanleitung 13

Notice d’installation et d’entretien 24

Istruzioni di installazione e funzionamento 35

Instrucciones de instalación y funcionamiento 46

Instruções de instalação e funcionamento 57

Οδηγίες εγκατάστασης και λειτουργίας 68

Installatie- en bedieningsinstructies 79

Monterings- och driftsinstruktion 90

Asennus- ja käyttöohjeet 99

Monterings- og driftsinstruktion 108

Instrukcja montażu i eksploatacji 117

Руководство по монтажу иэксплуатации 128

Szerelési és üzemeltetési utasítás 141

Navodila za montažo in obratovanje 152

Montažne i pogonske upute 161

Uputstvo za montažu i upotrebu 170

Instrucţiuni de instalare şi utilizare 181

Упътване за монтаж иексплоатация 191

Montážní a provozní návod 203

Návod na montáž a prevádzku 214

Montaj ve kullanım kılavuzu 225

Paigaldus- ja kasutusjuhend 234

Montavimo ir eksploatacijos instrukcija 243

Uzstādīšanas un ekspluatācijas instrukcija 252

Declaration of Conformity

We Grundfos declare under our sole responsibility that the prod-

uct GRUNDFOS ALPHA+, to which this declaration relates, is in

conformity with the Council Directives on the approximation of

the laws of the EC Member States relating to

– Machinery (98/37/EC).

Standard used: EN ISO 12100.

– Electromagnetic compatibility (89/336/EEC).

Standards used: EN 61000-6-2 and EN 61000-6-3.

– Electrical equipment designed for use within certain voltage

limits (73/23/EEC) [95].

Standards used: EN 60335-1: 2002 and EN 60335-2-51:

2003.

Bjerringbro, 1st April 2006

Svend Aage Kaae

Technical Director

1. General description

GRUNDFOS ALPHA+ is a range of circulator

pumps with integrated differential pressure con-

trol enabling adjustment of pump performance

to the actual system requirements. In many

systems, this will mean a considerable reduc-

tion in power consumption, prevent noise from

thermostatic valves and similar fittings, and im-

prove the control of the system.

2. Applications

GRUNDFOS ALPHA+ is designed for circulat-

ing liquids in heating systems. The pumps can

also be used in domestic hot-water systems.

Prior to installation, read these instal-

lation and operating instructions. In-

stallation and operation must comply

with local regulations and accepted

codes of good practice.

GRUNDFOS ALPHA+ is suitable for:

• systems with constant or variable flows

where it is desirable to optimise the setting of

the pump duty point,

• systems with variable flow-pipe tempera-

ture and

• systems where night-time duty is desired.

2.1 Pumped liquids

Thin, clean, non-aggressive and non-explosive

liquids, not containing solid particles, fibres or

mineral oil.

In heating systems, the water should meet the

requirements of accepted standards on water

quality in heating systems, e.g. the German

standard VDI 2035.

In domestic hot-water systems, it is advisable

to use GRUNDFOS ALPHA+ pumps only for

water with a degree of hardness lower than

approx. 14°dH. For water with a higher degree

of hardness a direct-coupled TPE pump is

recommended.

3. Installation

The pump must be installed with the motor

shaft horizontal, see n, page 261.

Arrows on the pump housing indicate the liquid

flow direction through the pump.

See mounting dimensions at the end of these

instructions.

The pump must not be used for the

transfer of inflammable liquids such

as diesel oil, petrol or similar liquids.

Care should be taken to ensure that

persons cannot accidentally come

into contact with hot surfaces of the

pump.

3.1 Terminal box positions

The terminal box can be turned to the positions

shown in o.

3.2 Changing the terminal box position

Change the terminal box position as shown in

3.3 Bypass valve

3.4 Non-return valve

If a non-return valve is fitted in the pipe system,

see q, it must be ensured that the minimum

pump pressure is always higher than the clos-

ing pressure of the valve.

3.5 Air separator pump

4. Electrical connection

The electrical connection and protection should

be carried out in accordance with local regula-

tions.

Before the screws are removed, the

system must be drained or the isolat-

ing valves on either side of the pump

must be closed as the pumped liquid

may be scalding hot and under high

pressure.

If the pump is installed in a two-pipe

system with a bypass valve between

flow pipe and return pipe, it is recom-

mended to set the pump to constant

pressure control as illustrated in the

figure.

GRUNDFOS ALPHA+ pumps type A

must be fitted with an automatic air

vent. This must be fitted to the pump

housing before priming.

• The pump requires no external motor protec-

tion.

• The operating voltage and frequency are

marked on the pump nameplate. Make sure

that the motor is suitable for the electricity

supply on which it will be used.

• Mains connection is to be carried out as

shown in t.

• The green indicator light on the pump termi-

nal box indicates that the electricity supply

has been switched on.

5. Start-up

Do not start the pump until the system has

been filled with liquid and vented. Furthermore,

the required minimum inlet pressure must be

available at the pump inlet, see section

7. Technical data. The system cannot be

vented through the pump.

As the pump is self-venting, it need not be

vented before start-up.

The pump may be noisy, when first switched

on, due to air remaining in the chamber. This

noise should cease after a few minutes run-

ning.

The earth terminal of the pump must

be connected to earth.

The pump must be connected to an

external mains switch with a minimum

contact gap of 3 mm in all poles.

When the inspection screw is slack-

ened (see r), scalding hot liquid un-

der high pressure may escape. Care

should be taken to ensure that the es-

caping liquid does not cause personal

injury or damage to other compo-

nents.

6. Setting the pump

The selector switch on the pump terminal box

has been factory-set to the middle position.

This setting is suitable for 80-90% of all single-

family houses.

The selector switch for normal and night-time

duty has been factory-set to "normal duty". If

night-time duty is desired, see section 6.3 Auto-

matic night-time duty.

6.1 Factory settings

Pump type Head

ALPHA+ xx-40 Maximum head up to

4 metres

ALPHA+ xx-60 Maximum head up to

6 metres

6.2 Change of head setting

Change the pump head by turning the selector

switch on the terminal box as indicated in the

table below:

Setting Result System

Factory

setting Pump perform-

ance according

to the heating

demand

(in 80-90% of all

single-family

houses).

Variable-load heating

system with normal

resistance, with or

without thermostatic

valves.

Pump head is

reduced.

Variable-load heating

system with low

resistance, with or

without thermostatic

valves.

Pump head is

increased.

Variable-load heating

system with high re-

sistance, with or with-

out thermostatic

valves, or underfloor

heating system.

Also systems fitted

with a bypass valve.

Pump running

at minimum per-

formance.

Small constant-load

heating system.

Setting when adjust-

ing a bypass valve.

Pump running

at medium per-

formance.

Medium-sized

constant-load heating

system.

Pump running

at maximum per-

formance.

Large constant-load

heating system.

Setting when venting

the system.

6.3 Automatic night-time duty

To ensure correct function of the automatic

night-time duty, these conditions must be ful-

filled:

• The pump must be installed in the flow pipe.

• The system must be fitted with a flow tem-

perature sensor and a device for automatic

control of the changeover between normal

duty and automatic night-time duty.

To activate the automatic night-time duty, turn

the selector switch on the terminal box to posi-

tion , see

(Pos. 1 = automatic night-time duty, pos. 2 =

normal duty.)

Note: If the heating system is undersupplied

(heat capacity too low), check whether auto-

matic night-time duty has been activated. If yes,

deactivate the function.

Once automatic night-time duty has been acti-

vated, the pump changes automatically be-

tween normal duty and night-time duty, see v.

(Pos. 1 = normal duty, pos. 2 = without auto-

matic night-time duty, pos. 3 = with automatic

night-time duty.)

Changeover between normal duty and night-

time duty is dependent on the flow-pipe temper-

ature.

The pump automatically changes over to night-

time duty when the built-in sensor registers a

flow-pipe temperature drop of more than

10-15°C within approx. 2 hours. The tempera-

ture drop must be at least 0.1°C/min.

Changeover to normal duty takes place without

a time lag when the temperature has increased

by approx. 10°C.

Pumps incorporated in gas boilers

with small water content must never

be set to automatic night-time duty.

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