English (GB)
15
7. Technical data
7.1 Complete fire pump set
Dimensions and weights, see section
.
Sound pressure level
The sound pressure level depends on the motor. It was measured
one metre away from the fire pump set. The sound pressure level
for the motor types is given in the table below. The motor type is
stated on the motor nameplate. See fig. 14, pos. 4.
7.2 Pump
See section
7.3 Motor
7.4 Controller
All optional relays have DPDT contacts rated for 8 A, 250 VAC.
8. Operating conditions
8.1 Minimum inlet pressure
At any time, there must be a positive inlet pressure. A minimum
inlet pressure of 5 psi is recommended.
8.2 Maximum inlet pressure
The sum of actual inlet pressure plus pump pressure against a
closed valve must always be lower than the maximum
permissible operating pressure. See section
. The maximum inlet pressure is 100 psi
(approx. 7 bar).
8.3 Minimum flow rate
Only brief periods of operation during start and stop are
permissible with a closed discharge valve. Prolonged operation at
less than 15 to 20 % of the pump’s rated capacity will cause
heating of the pumped liquid, impeller erosion, short life of
bearings and packing due to stress or vibration. Some pumps
may incur shaft damage and wear on stationary parts.
It is therefore advisable to install a bypass pipe to ensure a
minimum flow rate of at least 10 % at maximum efficiency.
The minimum flow rate helps to dissipate any excessive heat and
thus protect the pump against overheating.
How to install a bypass is shown in section
.
8.4 Pumped liquids
The pumps are suitable for clean and non-aggressive water, not
containing solid particles or fibres.
8.5 Liquid temperature
Maximum permissible liquid temperature is 40 °C. The pumps
can handle temperature from 0 °C to +120 °C.
8.6 Pump speed
The maximum pump speed is stated on the test report and shown
on the nameplate for the fire pump set. See fig. 11.
8.7 Maximum operating pressure
10, 16 or 25 bar.
The maximum operating pressure is stated on the pump
nameplate.
8.8 Ambient temperature
Minimum ambient temperature: +4 °C.
Maximum ambient temperature: +40 °C.
8.9 Relative air humidity
The relative air humidity must not be too high, to prevent
condensation of moisture in the air, as this can lead to damage of
the controller or the motor. If humidity is a problem, install a
space heater with a humidistat.
Motor output
[kW]
Sound pressure level [dB(A)]
2-pole
4-pole
18.5
78
68
22
82
68
30
84
71
37
84
73
45
84
73
55
85
75
75
86
78
90
86
78
110
89
85
132
89
85
160
92
89
200
92
89
250
95
93
315
95
93
Warning
When the motor is running, the sound pressure
level is > 70 dB(A). Hearing protection must
therefore be worn when working on or near the
motor.
Type:
Grundfos MMG-E, Siemens.
Enclosure class:
IP55.
Insulation class:
F.
Performance:
See section
.
Speed:
See section
.
Weight:
See section
.
Type:
Tornatech GPA or GPY.
Control cabinet:
Sheet steel, red.
Enclosure class:
IP42.
Dimensions W x H x D:
24'' x 36'' x 8''.
Weight:
125 to 270 kg.
Supply voltage:
3 x 380 V, 50 or 60 Hz.
Voltage tolerance:
± 10 %.
Maximum current consumption:
Depending on motor size.
EMC-noise emission:
According to EN61000-6-3.
EMC-noise immunity:
According to EN61000-6-2.
Degree of contamination:
2.
Control voltage:
380 V / 24 V.
Warning
Do not operate the pump at any pressure, flow
rate or liquid temperature other than those for
which the pump was originally purchased. Do not
pump any other liquid than the one for which the
pump was originally purchased without the
consent of Grundfos or its authorised
representatives. Disregard of this warning can
result in pump failure and serious personal injury
or death.
Caution
Inadequate inlet pressure will result in cavitation
damage to the impeller and casing.
Caution
Generally, the pump is not allowed to run against
a closed valve, as this may cause an increase in
temperature or formation of steam in the pump.
This may cause damage to the pump.
Caution
Operation of the pump with flow only through the
bypass is not allowed.
