Catalogue

WSHP-PRC020D-EN 5
Features and Benefits
Thermostat selections are provided in the “Thermostats and Zone Sensors,” p. 55 section of the
catalog.They are available in manual or automatic changeover options.
The deluxe controller includes relays for: anti-short cycle compressor protection, random start
delay, brown-out protection low pressure time delay, compressor delay on start and night setback
control.These extended control features offer greater system performance to extend the
equipment’s life.
TheTracer™ ZN510 controller (option) is provided on the vertical stack design for direct digital
control (DDC) systems.This controller offers the building owner innovative ways to optimize
heating and cooling energy for the building. Faults and sensors include: random start delay,
heating/cooling status, occupied/unoccupied mode, and fan/filter status.
TheTracer™ Loop Controller (TLC) may be added to either the Deluxe controls or the ZN510
controls to maintain system loop operation. See WMCA-IOP-1 for more information on theTLC.
The ZN510 controller may also be applied with theTracker and Summit building management
systems to further enhance system operation.
Non-fused switch and fused entrance block may be factory added to the equipment to save
installation time of these components in the field where local building codes allow.
Deluxe 24V Electronic Controls
General alarm is accomplished through the lockout relay and is used to drive light emitting diodes.
This feature will drive dry contacts only, and may not be used to drive field installed control inputs.
Factory Installed Flow Control
Optional factory mounting of the isolation valve and flow control valves is available to speed field
equipment installation, and help provide optimum water flow balancing support.
Refrigeration Section
The unit’s compressor is a highly efficient, hermetically sealed with internal vibration isolation.
External isolation is provided between the compressor and mounting plate to help reduce radiated
noise that is typically associated with compressor start.
The air-to-refrigerant coil is easily accessible for cleaning purposes behind the unit’s removable
return-air door/panel.
The water-to-refrigerant coil is a copper or cupro-nickel (option) co-axial tube-within-a-tube design.
The inner-water tube is deeply fluted to enhance heat transfer and minimize fouling and scaling.
The outer refrigerant gas tube is made from steel material.The coil is leak tested to assure there
Figure 2. Deluxe control box
Figure 3. ZN510 control box