Figure 4-3 Air guidance from the NDE to the DE (schematic representation, type 1PH828.) for IP55
External fan
The code for the external fan is at the eleventh position of the order number. The order number
– and therefore the installed external fan type – is specified on the rating plate.
Machines with pipe connection
You must mount and connect pipes and a fan of suitable type and dimensioning to machines
that are intended for the connection of pipes and/or for operation with an external fan.
Please observe the following when connecting pipes:
● Additional pressure drop in the system.
● Shipping covers on the ventilation openings must have been removed.
For machines with a pipe connection, the potential pressure drop inside the machine is given
in the following table:
Table 4-2 Pressure drop in motors with pipe connection
Type Degree of pro‐
tection
Volume flow Pressure drop Flow resistance
1PH818. IP23 0.21 m
3
/s 450 Pa 10204 Ns
2
/m
8
IP55 0.17 m
3
/s 550 Pa 19030 Ns
2
/m
8
1PH822. IP23 0.33 m
3
/s 600 Pa 5510 Ns
2
/m
8
IP55 0.31 m
3
/s 650 Pa 6760 Ns
2
/m
8
1PH828. IP23 0.52 m
3
/s 600 Pa 2220 Ns
2
/m
8
IP55 0.42 m
3
/s 600 Pa 3400 Ns
2
/m
8
Preparations for use
4.4 Ensuring cooling
SIMOTICS M-1PH8 1PH818., 1PH822.
32 Operating Instructions 07/2016
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