4
CONTENTS
Page
General description
Operating conditions
Sound pressure level
Safety 4
Transportation and storage
Installation 4
Installation on auto-coupling
Free-standing installation
Pumps supplied with control box
Separate level controllers
Electrical connection
Motor protection
Start-up 6
Direction of rotation
Maintenance and service
Contaminated pumps
Fault finding chart
Disposal
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The in-
stallation and operation should also be in
accordance with local regulations and ac-
cepted codes of good practice.
1. General description
1.1 Applications
GRUNDFOS AP70 pumps are designed for pump-
ing:
• 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.
1.1.1 Explosive environments
Use the explosion-proof AP pump versions for appli-
cations 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
AP 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 15 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/EEC 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.
4.1 Installation on auto-coupling
See figs. A and B, pages 52 and 53.
Pumps for permanent installation can be installed on
a stationary auto-coupling and operated completely
or partially submerged in the pumped liquid.
1. Drill mounting holes for guide rail bracket on the
inside of the pit and fasten the guide rail bracket
provisionally with two screws.
Pump installation in wells must be carried
out by specially trained persons.
