Relay Wiring And Use; First Time Set-Up And General Operation - Blue I HydroGuard HG-302 Manual De Uso

The sensor cable may be cut or extended up to a maximum distance of 650 feet (200m) as needed.
If the turbidity relay is not going to be connected to any external equipment, the installation is complete. If
the relay will be used to operate equipment based on the turbidity set point, the following steps will need to
be followed:

6.5.6 Relay Wiring and Use

Turn off all power supplies to the controller.
Wiring of the NTU (turbidity relay) is identical to wiring of all other relays and should be connected to a pump-
dependent (interlocked) power supply.
The line (live) wire of the pump-dependent power source connects to the connection labeled Common on
the NTU relay. The line wire of the controlled external turbidity equipment is connected to the normally open
(N ) or normally closed (N
O
will be open (i.e. 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 ground wire of the power supply to the ground return wire from the controlled
external turbidity equipment.
3. Connect the neutral wire of the power supply to the neutral wire from the controlled external turbidity
equipment.
4. Connect the line (live) wire of the power supply to the connector marked 'C' (common) on the NTU
terminal block.
5. Connect the line (live) wire of the controlled external turbidity equipment to the normally open (N
normally closed (N
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.

6.5.7 First Time Set-up and General Operation

Although the turbidity unit is connected, it will not operate until it is set-up in the controller menu.
6.5.7.1 Operator Menu
If the NTU relay is connected to external equipment:
1. Press Scroll until "Turbidity Set Point" appears on the display and press enter
2. Enter the operator or technician password and press enter
3. Enter the turbidity set point value and press enter
With or without the NTU relay connected to external equipment:
4. Press Scroll until "Turbidity High Alarm" appears on the display and press enter
5. Enter the operator or technician password and press enter
6. Enter the turbidity high alarm value and press enter
) connection of each relay as appropriate. Normally Open means that the relay
C
) connection on the NTU terminal block.
C
67
) or
O