Nortec HP Series, Installation And Operation Manual, Page: 28 / 76

25 | HP Series Installation Manual
Pump Controller Wiring Notes
Connections to Nortec Valve Controller
The pump controller can accept control input from many different valve controllers at once. This
is useful for cases when a single large pump skid is used to supply high-pressure water to
different zones / manifold groups. For example, 1 large pump skid supplies water to 3 different
air-handlers, each with their own manifolds, valves, and valve controller.
If there are more than 4 valve controllers, additional controllers can be added by doubling up
wires on the pump controller terminal strip. For example; valve controller 5 would share
terminals 1 and 5 with valve controller 1.
Connections to Valve Controllers by Others
Non-Nortec valve controllers can be used with the HP HVAC system. In these cases the valve
controller is wired to the pump controller, as it would be with a Nortec valve controller. The
valve controller need only close the loop, and does not need to provide a voltage or current. If
the valve controller does provide a signal, it should be wired to a relay which will then close the
pump controller loop.
Remote Monitoring
The pump controller terminal strip features several sets of dry contacts to allow for connections
to a building management system, status lights, or other types of equipment. They are
controlled by a relay and activated under certain conditions. Wire gauge is determined by the
equipment to be using the contacts. Refer to the manufacturers recommendations.
On (Terminals 10 and 11): Closed when the HP HVAC system is powered on and ready.
Active (Terminals 12 and 13): Closed when the HP HVAC system is humidifying.
Service (Terminals 14 and 15): Closed when the HP HVAC system requires regular
maintenance. (See Chapter X for service information.)
Fault (Terminals 16, 17 and 18): Terminal 16 is normally open and closes when an operation
fault occurs. Terminal 18 is normally closed and opens when an operational fault occurs.
Terminal 17 is a common terminal for both cases.