Radiant Products (PIC-HP)

Price Intelligent Controller - Radiant Products (PIC-HP)

Radiant PIC-HP
Introduction
Radiant systems are gaining popularity due to their ability to offer increased energy efficiency and cost savings when compared with traditional all-air systems. As more experience is gained in designing radiant systems, it is recognized that the control systems and accessories associated with these systems carry unique characteristics and opportunities. For this reason, Price controls for radiant systems have been designed to be as versatile and modular as possible, and accessories and options have been chosen to compliment both the controls and system.

Price Intelligent Controller for Radiant Products (PIC-HP)
The PIC-HP is a standalone or networkable, fully digital and programmable controller. This control solution is ideal for managing the sequences of Price radiant heating and cooling products. The PIC-HP is an advanced and configurable proportional integral (PI) controller that allows for exceptional user comfort and energy efficiency. It is designed specifically to manage the control requirements of radiant systems.

The PIC-HP is designed with a modular architecture and includes BACnet networking as standard. This gives the customer flexibility by providing both the “core” controller as well as powerful control and communication options with the use of the expansion modules.

Typical Application Overview
The PIC-HP can be factory configured to any one of the eight standard control sequences, as well as custom sequences, if required. There are six standard sequences that control water flow only, and two standard sequences that control the water flow and VAV air (variable air volume). The standard control sequences are available for either 2 pipe or 4 pipe operation and indicate the control output used with the associated actuator type (on/off or 0-10Vdc modulating). Typical control sequences for water and air include:

On/Off, 2 Pipe, Constant Air Volume (Sequence #9701) Chilled Water Supply Only
Upon an increase in room temperature above the set-point, the air volume will remain at its pre-selected level while the cold radiant valve opens fully. When the room temperature decreases to the setpoint, the cold water actuator turns off the flow.

On/Off, 2 Pipe, Constant Air Volume (Sequence #9703) Hot Water Supply Only
Upon a decrease in room temperature below the room set-point, the air volume will remain at its pre-selected level while the hot radiant valve opens fully. When the room temperature increases to the set-point, the hot water actuator turns off the flow.
  Modulating, 2 Pipe, Constant Air Volume (Sequence #9700) Chilled Water Supply Only Upon an increase in room temperature above the room set-point, the air volume will remain at its pre-selected level while the cold radiant valve modulates from closed to open in proportion to the room temperature. Upon a decrease in room temperature, the cold radiant valve modulates closed.

Modulating, 2 Pipe, Constant Air Volume (Sequence #9702) Hot Water Supply Only
Upon a decrease in room temperature below the room set-point, the air volume will remain at its pre-selected level while the hot radiant valve modulates from closed to open in proportion to the room temperature. Upon an increase in room temperature, the hot radiant valve modulates closed.

On/Off, 4 Pipe, Constant Air Volume (Sequence #9705) Chilled Water Supply
Upon an increase in room temperature above room the set-point, the air volume will remain at its pre-selected level while the cold radiant valve opens fully. When the room temperature decreases to the set-point, the cold water actuator turns off the flow. The hot water valve remains fully closed.

Dead Band
With no demand in the space (ie. when the temperature is at or close to the set-point), the water valves (hot and cold) remain closed and the air volume remains constant.

Hot Water Supply
Upon a decrease in room temperature below the room set-point, the air volume will remain at its pre-selected level while the hot radiant valve opens fully. When the room temperature increases to the set-point, the hot water actuator turns off the flow. The cold water valve remains fully closed.

Modulating, 4 Pipe, Constant Air Volume (Sequence #9704) Chilled Water Supply
Upon an increase in room temperature above the room set-point, the air volume will remain at its pre-selected level while the cold radiant valve modulates from closed to open in proportion to the room temperature. Upon a decrease in room temperature, the cold radiant valve modulates closed. The hot radiant valve is always fully closed.

Dead Band
With no demand in the space (ie. when the temperature is at or close to the set-point), the water valves (hot and cold) remain closed and the air volume remains constant.


Note: Dynamic Heat-Cool Changeover for 2 Pipe Systems (HCCO)
The controller will modulate the water valve when heating or cooling is required. For example, if the space set-point is 72°F and the water temperature is below the set-point, the system is in cooling mode. If the space set-point is 72°F and the water temperature is above the set-point, the system is in heating mode. PIC-HP HCCO sequences are available for 2 pipe configurations, where both cold and hot water are supplied. The supplied changeover probe (PIC-PRB) allows HCCO operation. If no probe is connected to the thermostat, the controller assumes that it is receiving chilled water supply and acts accordingly.

 
Modulating, 2 Pipe, Variable Air Volume (Sequence #9706) Chilled Water Supply OnlyUpon an increase in room temperature above the room set-point, the air volume will remain at minimum ventilation to meet building code and latent load requirements while the cold radiant valve modulates from closed to open in proportion to the room temperature. The air volume will modulate from minimum position to full open as a secondary stage of cooling in proportion to the room temperature, when required. Upon a decrease in room temperature or during off-peak hours, the cold radiant valve modulates closed and the air volume is modulated to minimum ventilation.

 
Modulating, 4 Pipe, Variable Air Volume (Sequence #9707) Chilled Water Supply
Upon an increase in room temperature above the room set-point, the air volume will remain at minimum ventilation to meet building code and latent load requirements while the cold radiant valve modulates from closed to open in proportion to the room temperature. The air volume will modulate from minimum position to full open as a secondary stage of cooling in proportion to the room temperature, when required. Upon a decrease in room temperature or during off-peak hours, the cold radiant valve modulates closed and the air volume is modulated to minimum ventilation. The hot radiant valve is always fully closed.

 
Hot Water Supply
Upon a decrease in room temperature below the room set-point, the air volume will remain at minimum ventilation to meet building code while the hot radiant valve modulates from closed to open in proportion to the room temperature. The air volume will modulate from minimum position to full open as a secondary stage of heating in proportion to the room temperature, when required. Upon an increase in room temperature or during off-peak hours, the hot radiant valve modulates closed and the air volume is modulated to minimum ventilation. The cold radiant valve is always fully closed.
The pdfs are best viewed with Adobe Reader. Download it now.
Adobe Reader

PRICE ONLINE CATALOG

 
RepresentativesAbout PriceCareersContact UsPrivacy PolicyLimited Warranty
Copyright ©2014, All Rights Reserved - Price Industries
2975 Shawnee Ridge Court - Suwanee, Georgia 30024 - (770) 623-8050