Argo-Hytos SD1EX-A2, Руководство по эксплуатации

Страница: 14 / 42

Subject to change_SD1EX-A2(A3)_14088_1en_05/2022
Page 14
www.argo-hytos.com
ground screw
terminal
› Screw M3 with an inbus wrench a= 2.5 mm to a torque of 1.2 + 0.2 Nm.
› Check the lid seal for damage and fit the lid onto the coil body. Tighten the lid using four M4x35 DIN 912 screws and torque to 4 + 0.5 Nm (3.0 +
0.4 lbf.ft) using an inbus wrench s = 3.
› Assemble the cable grommet as shown. Tighten the cable grommet nut (5) with the key a = 24 so that the cable is held firmly in the grommet.
The tightening torque of the nut depends on the cable diameter.
› Remove the insulation from the end of the cable so that when the cable is fixed in the grommet, the insulated part of the cable extends sufficiently
into the inner space of the terminal block.
› Strip a 5 mm length of the ends of the power supply wires and equip the ground wire with an M3 - 0.75 mm 2 cable gland designed for ambient
temperatures of +.125 °C (+257 °F) and above.
› Secure the coil power wires with a maximum cross section of 2 mm
2
to the terminal block using a 3 mm screwdriver.
Tighten the screws to 0.4 Nm (0.30 lbf.ft).
› Thread the cable lug of the ground wire under the head of the ground screw, located next to the terminal block, and screw in and tighten the
ground screw M3 with an inbus wrench a= 2.5 mm to a torque of 1.2 + 0.2 Nm.
› After mounting the valve, it is necessary to ground the coil surface by connecting the ground wire to the terminal on the surface of the
terminal cover using an M5x10 screw. Tighten the screw using an 8 mm screwdriver.
DANGER
Correct electrical connection of coils
Make sure that the wires are properly attached to the terminal block and to the grounding screw.
Ensure that the terminal box cover and the cable in the grommet are properly fastened and sealed.
There is a risk of explosion.
DANGER
Coil surface grounding
If the surface of the coil and thus the entire valve is not grounded, an electrical discharge of static electricity
may occur.
› The user must protect the electrical circuit of the solenoid with a fuse with a tripping characteristic corresponding to the slow fuse wire
blowing. The fuse tripping current shall be I
N
≤ 3x I
G
, where I
G
is the current flowing through the solenoid coil at the maximum coil
temperature. (For I
G
values, see the coil electrical parameter table.) Conductors and elements shall be used for the fuse circuit that are
rated for a higher electric current than the maximum short-circuit current in the customer‘s equipment circuit.
› If elements of the electrical installation, including the fuse, are also located in a potentially explosive atmosphere, these elements must also
have the appropriate degree of protection.