Electrical Requirements And Installation; Connecting The Main Electrical Power Source; Connecting The Dependent Relay Power Source - Blue I HydroGuard HG-302 Manual De Uso

3.4

Electrical Requirements and Installation

HydroGuard requires a 110-120 or 220-240 VAC, 50/60 Hz electrical power source on a separate 16A circuit
in the plant room's electrical board. The main HydroGuard power supply should be connected to a non-
dependent power supply, so that the unit remains powered constantly. The active relays should be
connected to a (pump) dependent power supply (interlocked power supply) to provide an additional layer of
prevention against chemical addition and equipment operation when the main circulation pump is not
operating.

3.4.1 Connecting the Main Electrical Power Source

The Main Power Supply may be connected to either 110-120 or 220-240VAC 50/60Hz. Switching between
voltages is accomplished by changing two (2) jumpers located above the main power connection, to the left
of the transformer. For 110-120VAC, a 1amp fuse should be use; for 220-240VAC, a 0.5amp fuse should be
used. These changes must be completed prior to wiring.
Caution: Before making a connection to a power source, confirm that both jumpers are located
on the correct voltage and that the appropriate fuse is in place.
1. Verify that the power switch or circuit breaker to the non-dependent power source is off.
2. Connect the line (live) wire to the electronic relay board connector marked Line.
3. Connect the neutral wire to the electronic relay board connector marked Neutral.
4. Connect the earth wire to the I/O Module connector marked Ground.
5. Continue with the other electrical connections.
6. Turn on electrical power only after all electrical connections have been completed.

3.4.2 Connecting the Dependent Relay Power Source

The line (live) wire of the pump-dependent power source connects to the connection labeled Common on
each relay. The line wire of each controlled system is connected to the normally open (N
closed (N ) connection of each relay as appropriate. Normally Open means that the relay will be open (i.e.
C
no power from the relay) until the controller calls for power; Normally Closed means that the relay will be
closed (i.e. power from the relay) until the controller calls to stop power.
1. Verify that the power switch or circuit breaker to the pump-dependent power source is off.
2. Connect the earth wire to the ground return wire from each of the controlled dosing systems.
3. Connect the neutral wire to the return wire from each of the controlled dosing systems.
4. Connect the line (live) wire to the connector marked Common of each active relay.
Caution: Each relay connection is limited to 4 amps, to prevent overheating. The relays may show a
higher rating but do not connect equipment exceeding 4 amps.
14
) or normally
O