Description - PENN Controls - LIT-1900699 - A99 - C450CCN - C450SCN - C450YNN - System 450 Multi-Purpose Modular Control System - A99 Temperature Sensor - C450CCN Standard Control Module Two Relay Outputs - C450SCN Expansion Module Two Relay Outputs - C450YNN‐1 Power Module

Heating and Cooling Control with System Status Indication Application Note
Product name
A99 Temperature Sensor
C450CCN Standard Control Module Two Relay Outputs
C450SCN Expansion Module Two Relay Outputs
C450YNN‐1 Power Module
Document type
Application Note
Document number
LIT-1900699
Revision date
2020-04-15
Important: Use this System 450™ modular control assembly only as an operating control. Where failure or malfunction of the System 450 modular control assembly could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the System 450 modular control assembly.

Refer to the System 450 Series Modular Control Systems with Standard Control Modules Technical Bulletin (LIT-12011459), the System 450 Series Modular Controls Product Bulletin (LIT-12011458), and the installation instructions for product specifications, detailed installation procedures, and important product safety information.

The C450CCN-x Control Module maintains the temperature with the OUTR1 output connected to the heating equipment and the OUTR2 output connected to the cooling equipment. See the wiring diagram for an illustration of this connection. Use a C450SCN-x Expansion Module to activate indicator lights or alarms in the event of out-of-range temperature conditions.

When the system is in operation, one of three status lights or audible alarms indicates the operating status.

Figure 1. Heating and Cooling Control with System Status Lights Wiring Diagram

Figure 2. Application Operating Sequence

Figure 3. Setup Screens for the Heating and Cooling Control Applications with System Status Indication System Example