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1. Disconnect the communication terminals.
2. Disconnect the control terminals on the PEM.
For specially-approved pumps, do not disconnect T3 and T4 from the separate plinth.
3. Disconnect the functional ground.
4. Remove the two screws securing the PEM.
5. Lift out the PEM.
6. Fit the new PEM into place. Secure with two screws.
7. Connect the functional ground.
8. Connect the control terminals.
For specially-approved pumps, do not use connections 51 and 63 on the PEM. For EX-
pumps, T3 and T4 must be connected to the separate plinth.
9. Connect the communication terminals.
10. To download information to the PEM, see the System Installation and Operation (SIO)
Manual for the MAS 801 monitoring equipment.
6.10 Torque values
All screws and nuts must be lubricated to achieve correct tightening torque. Screws that are
screwed into stainless steel must have the threads coated with applicable lubricants to
prevent seizing.
If there is a question regarding the tightening torques, then contact a sales or authorized
service representative.
Screws and nuts
Table 19: Stainless steel, A2 and A4, torque Nm (lbf·ft)
M4
M5
50
1.0
2.0
(0.74)
(1.5)
70, 80
2.7
5.4
(2)
(4)
100
4.1
8.1
(3)
(6)
Table 20: Steel, torque Nm (lbf·ft)
M4
M5
8.8
2.9
5.7
(2.1)
(4.2)
10.9
4.0
8.1
(2.9)
(6)
12.9
4.9
9.7
(3.6)
(7.2)
P7900 Installation, Operation, and Maintenance Manual
M6
M8
M10
3.0
8.0
15
(2.2)
(5.9)
(11)
9.0
22
44
(6.6)
(16)
(32)
14
34
66
(10)
(25)
(49)
M6
M8
M10
9.8
24
47
(7.2)
(18)
(35)
14
33
65
(10)
(24)
(48)
17
40
79
(13)
(30)
(58)
M12
M16
M20
27
65
127
(20)
(48)
(93.7)
76
187
364
(56)
(138)
(268)
115
248
481
(84.8)
(183)
(355)
M12
M16
M20
81
194
385
(60)
(143)
(285)
114
277
541
(84)
(204)
(399)
136
333
649
(100)
(245)
(480)
6 Maintenance
M24
M30
220
434
(162)
(320)
629
1240
(464)
(915)
—
—
M24
M30
665
1310
(490)
(966.2)
935
1840
(689)
(1357)
1120
2210
(825.1)
(1630)
65
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