Electrical connection, Connecting the terminal strips, Tools – Flowserve SRL63-A User Manual
Page 10: Connecting the terminal strips tools
10
Electrical Connection
Connecting the terminal strips
Connect the terminal strips as shown in the wiring diagram.
The measuring pot is provided with three shut-off valves. Valves D and E are each equipped with two limit
switches, for the "OPEN" position (D1 / E1) and for the "CLOSED" position (D2 / E2). The drain valve F is
only fitted with one limit switch, for the "CLOSED" position.
For connecting the limit switch, we recommend a control cable, e.g. Ölflex 110H, 7 x1mm², length max.
100m.
External pilot lamps can be connected to terminals 11 to 14.
Check whether the mains voltage matches the voltage of the safety circuit. If this is not the
case, it is necessary to use a logic unit with the correct voltage for the safety circuit.
If both low-level limiter electrodes of a boiler are installed in external measuring pots, simul-
taneous purging and bypassing of the low-level limiters is not admissible.
To prevent this happening, the two logic units must be interlocked by means of parallel con-
nections between the terminals 16 to 20 of either unit.
In addition:
■
To protect the relay contacts, fit the safety circuit with a fuse T 2.5A (slow-blow) or
1A (TRD 604, 72 h operation).
Tools
■
Screwdriver for slotted screws, size 2.5, fully insulated to VDE 0680-1.
■
Cross-head screwdriver, size 2.
Note
Attention