Grundfos APG Series, Installation And Operating Instructions Manual

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CONTENTS
Page
1. General description 42
1.1 Applications 42
1.2 Operating conditions 42
1.3 Sound pressure level 42
2. Safety 42
3. Transportation and storage 42
4. Installation 42
4.1 Installation on auto-coupling 43
4.2 Free-standing installation 43
4.3 Pumps supplied with control box 43
4.4 Separate level controllers 43
5. Electrical connection 43
5.1 Motor protection 44
6. Start-up 44
6.1 Direction of rotation 44
7. Maintenance and service 44
7.1 Contaminated pumps 45
8. Fault finding chart 46
9. Disposal 46
1. General description
1.1 Applications
Grundfos APG pumps are designed for pumping:
• wastewater,
• sludge-containing water,
• groundwater,
• sewage from restaurants, hotels, camping sites,
etc.
The compact design makes the pumps suitable for
both temporary and permanent installation. Further-
more, the pumps are suitable for free-standing instal-
lation as well as installation by means of an auto-
coupling guide rail system.
The APG pumps are equipped with a cutter system
which cuts all destructible solids into small pieces so
that they can be led away through pipes of a rela-
tively small diameter.
1.1.1 Explosive environments
Use the explosion-proof APG pump versions for
applications involving the risk of explosion.
Note: In each individual case the explosion classifi-
cation of the pump must be approved by the local
authorities for use at the desired installation site.
1.2 Operating conditions
1.2.1 pH-value
APG pumps in permanent installations can cope with
pH-values ranging from 4 to 10.
1.2.2 Liquid temperature
Liquid temperature: 0°C to +40°C.
For short periods up to +60°C.
1.2.3 Density of pumped liquid
Maximum density of pumped liquid: 1100 kg/m
3
.
1.2.4 Installation depth
Maximum 10 metres below liquid level.
1.2.5 Level of pumped liquid
The lowest stop level must always be above the top
of the pump housing.
1.2.6 Operation
Maximum 20 starts per hour.
Note: The pumps are designed for intermittent oper-
ation only.
1.3 Sound pressure level
The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
98/37/EC relating to machinery.
2. Safety
3. Transportation and storage
The pump may be transported and stored in a verti-
cal or horizontal position. Make sure that it cannot
roll or fall over.
Always lift the pump by its carrying handle, never by
the motor cable or the hose/pipe.
For long periods of storage, the pump must be pro-
tected against moisture and heat.
After a long period of storage, the pump should be
inspected before it is put into operation. Make sure
that the impeller can rotate freely. Pay special atten-
tion to the shaft seals and the cable entry.
4. Installation
The loose nameplate supplied with the pump should
be fixed at the installation site.
Prior to installation, check the oil level in the oil
chamber, see section
7. Maintenance and service .
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The
installation and operation should also be in
accordance with local regulations and
accepted codes of good practice.
Pump installation in wells must be carried
out by specially trained persons.