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WattMaster WHP Section 1
Design Guide 1-5
Pump Reset and Aux. Heating or Cooling. An internal seven day schedule and holiday
schedule functions are also built into each WHP Controller.
With the WHP system the sometimes complex control requirements of a large water
source heat pump system can be handled with an off the shelf controls system that has
most of the features of a full blown building automation system but at a much lower cost.
Included with the WHP system is a communications interface module, which allows you
to connect a computer to the system onsite and a modem connection for remote
monitoring.
Prism, a Windows based software package is available at no additional charge. Some of
Prism’s features include graphics, trend logging, and remote alarm call out capabilities.
WHP Loop Controller
The Water Source Heat pump Loop Controller can be supplied with the system to control
the water loop and its various pieces of equipment. The Loop Controller can operate
stand-alone or used with the Water Source Heat Pump Controller (WHP) and in this
configuration communicates common data, such as outside air temperature, proof of flow
etc., over a network. A System Manager is connected to the Loop Controller to provide a
central operator’s interface to the Loop Controller’s setpoints and operating
configurations. The Loop Controller is designed with inputs for Supply and Return Water
Temperature, Outdoor Air Temperature, Loop Water Pressure Switch or 0-50 PSI Loop
Pressure Sensor (4-20ma), Manual Reset Contact, Phase Loss Contact, Request to Run
Relay, and Fire/Smoke Relay. Analog outputs (0-10VDC) are supplied for Pump VFD
and Proportional Heat. Binary outputs are provided for Compressor Enable, Main Pump
Relay, Standby Pump Relay, Alarm Contacts and (8) Relays that can be configured for
Heat Rejection or Heat Addition.
Make Up Air Controller
A Make Up Air Controller, for treating 100% outdoor air, is available for use with the
Water Source Heat Pump system. Please consult factory for more information on this
product.