DURAG D-R 290, Operating Manual

Page: 102 / 202

5 | Installation
102 D-R 290
The pure air unit is supplied with 10 m of purge air hose Ø 40mm, temperature range
– 25 to + 85°C.
The optional weather protection cover type D‑BL WSH is also made of stainless steel
(material no. 1. 4301).
Electrical installation of the purge air unit
During electrical installation of the purge air unit, note the following:
1. The local mains voltage and frequency must be compared to the data on the type
label. Connect the unit only if the data match.
2. Connect the protective earth conductor to the earthing terminal.
3. Perform the connection and arrangement of the jumpers according to the connec­
tion schematics in the terminal box lid.
4. Set the motor protection switch (not supplied) to the rated current of the motor.
5. The direction of rotation of the blower motor must be checked.
For technical data of the purge air unit see the Appendix.
The measuring head and reflector will be damaged if the purge air supply fails
If the purge air supply is not running, the measuring head and reflector within the duct
will be irreversibly damaged within a short time due to excessive heat and dust.
▶
It is absolutely essential that the measuring head and reflector are removed from
the measurement duct before the purge air is switched off!
▶
Under no circumstances allow the measuring head and reflector to remain in the
measurement duct if the purge air supply is not running.
▶
Ensure a reliable supply of purge air, even when the system is stopped.
It is therefore recommended that the purge air unit is provided with a separate fuse.
Electrical connection for the purge air motor
dr
w
_
D
-B
L
xx
x_
E
le
kt
ris
ch
e
A
n
sc
hl
üs
se
S
pü
llu
fte
in
h
ei
t_
0
00
4_
S
1
L1 N
U3 U2 Z4
U1 1/2CA1 U4
Erde Ground
Z2
Z3
Z1
1/2CA1
1/2CA2
C
B
Typ D-BL 1-00 ...
115 V
L1 N
U3 U2 Z4
U1 1/2CA1 U4
Erde Ground
Z2
Z3
Z1
1CA1
1CA2 2CA1
2CA2
C
B
C
B
Typ D-BL 1-00 ...
230 V
Fig. 5.37: Electrical connection for the purge air motor
Also see about this
2
Personnel, skills [
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22]
5.8.3
5.8.4
Fig. 5.36: Junction box