English (GB)
16
8.10 Effect of ambient temperature and altitude on
motor output
If the ambient temperature e40 °C (fig. 16), or the motor
is installed more than 1000 metres above sea level, the motor
must not be fully loaded due to the low density and consequently
low cooling effect of the air. In these cases, it may be necessary
to use a motor with a higher output.
Fig. 16
Relation between motor output, altitude and ambient
temperature
9. Installation
9.1 Installation site
Place the fire pump set in a clean, dry, frost-free and well-
ventilated location. It must be secured that unauthorised persons
do not have access to the location.
Allow sufficient clearance around pump and motor to enable
inspection, repair and assembly work.
9.2 Foundation
It is advisable to install the fire pump set on a concrete foundation
which is heavy enough to provide permanent and rigid support for
the entire fire pump set. The foundation must be capable of
absorbing any vibration, normal strain or shock. As a rule of
thumb, the weight of the concrete foundation should be 1.5 times
the weight of the fire pump set. Ordinarily, the proportions used
are one part cement to three parts sand and four parts medium
aggregate.
The concrete foundation must have an absolutely level and even
surface. Provide the foundation with anchor bolts to fasten to
fasten the fire pump set.
Recommended length and width of the foundation, see fig. 16.
Note that the length and width of the foundation must be 200 mm
larger than the length and width of the base frame.
See dimension x.
The minimum height of the foundation (h
f
) can be calculated as
follows if the weight of the foundation is assumed to be 1.5 times
that of the pump:
The density (
δ
) of the foundation is usually taken as 2,200 kg/m
3
.
In installations where low-noise operation is particularly
important, we recommend a foundation with a weight of up to five
times that of the pump.
Fig. 17
Dimensions of foundation
TM
0
0
2
189
4
198
Warning
The installation must be carried out in
accordance with the following instructions.
Non-compliance may result in functional faults
which will damage the pump components.
Caution
Ensure an adequate supply of air for cooling the
motor and control cabinet.
20 25 30 35 40 45 50 55 60 65 70 75
80
50
60
70
80
90
100
[%]
P1
t [°C]
1000
2250
3500 m
Warning
Make sure that weight of the fire pump set and
foundation does not exceed the permissible
bearing load of the floor.
h
f
=
m
pump
× 1.5
L
f
× B
f
×
δ
concrete
TM
03 377
1 120
6
