Hydro-Air P-38
Installation
pH / ORP Analyzer
5
4.0
Installation
This part describes how to install the controller and how to connect the unit to a
power source and auxiliary equipment.
Wiring Installation
The specified performance of the controller is entirely dependent on correct
installation. For this reason, the installer should thoroughly read the following
instructions before attempting to make any electrical connections to the unit.
DANGER!
Electrocution Hazard; Do not connect AC power to a 24VDC
powered model and vice versa. Always avoid water when
working with electricity. Never touch or try repairing any
electrical parts or circuits with wet hands. It increases the
conductivity of the electric current.
WARNING!
Always remove the main power from the system before
attempting any alterations to the wiring. Ensure that both power
input lines are isolated. Make sure that the power cannot be
switched on by accident whilst the unit is being connected. Local
wiring and safety regulations should be strictly adhered to when
installing this unit.
4.1.
Electrical Construction
The controller operates with a main switch. Hence, the controller operates
immediately once connected to the power supply. The result can be observed via
the display panel. The controller features two actuators (relays) which provide
control functions. Moreover, the relays are designed to activate metering pumps
and solenoid valves. The activation variables are recalculated every second.
The controller comes in two different variants; P38 which runs with 90~260VAC
power supply, and P38-DC which runs with 24VDC power supply.
