
AMMONIA User Manual
AMMONIA_User 9/09
12
B.2.2 Wiring Rules
Analog Sensor Wiring
Analog sensors, contact sets, water meters and flowswitches may be cabled in a common conduit
without causing operational problems.
Do not mix AC Line, 120VAC & 240VAC wiring with any sensor or communications cable in a common
conduit. Grounded, metallic conduit is preferred in areas where variable frequency drives operate.
Sensor cables, with the exception of pH sensors, may be extended in paired AWG22, 0.25mm
2
cable.
Ensure that cabling splices are accessible in conduit fittings or junction boxes.
Verify that the shields on contact head water meters are also spliced when meter cables are extended.
Ground cable shields at one end only to the internal frame lower bottom grounding screw.
Ethernet LAN Cabling
CAT5 LAN cabling is limited to a maximum of 300ft / 100m from controller to access hub.
Do not exceed this limit.
AC Controller Power
Power the controller using a dedicated, separate breaker in the local lighting-distribution panel.
Do not route the controller AC power in common conduit with variable frequency pump drives.
AC Power to Valves & Solenoids
Controller ON/OFF relays switch and power the AC line to valves & solenoids. Ensure that each valve &
solenoid has a dedicated neutral cable between the controller and the valve or solenoid. Do not share a
common neutral to multiple valves or solenoids.
Fractional Horsepower Chemical Feed Pumps
The controller ON/OFF relays are fused at 5 amps total which will power multiple solenoid driven
chemical feed pumps and solenoid coils. Fractional horsepower chemical feed pumps cannot be directly
powered by the controller. Use the controller 120VAC control output to switch a motor start relay with a
120VAC coil.
Fractional horsepower feed pumps are commonly used in high pressure boiler chemical feed
applications and waste water polymer feeds.
Typically the motor inrush current requires a dedicated breaker and separate AC feed from the controller
AC power breaker.