Reset control - PENN Controls - LIT-12011458 - C450Cxx - C450Rxx - C450Sxx - C450Yxx - System 450 Multi-Purpose Modular Control System - C450CBN Standard Control Module One Relay Output - C450CCN Standard Control Module Two Relay Outputs - C450CEN Communications Control Module for Ethernet - C450CPN Standard Control Module One Analog Output - C450CPW-400 Hybrid Control Module for EC Motor - C450CQN Standard Control Module Two Analog Outputs - C450CRN Communications Control Module for Modbus - C450RBN Reset Control Module One Relay Output - C450RCN Reset Control Module Two Relay Outputs - C450SBG Expansion Module One Low-Voltage Relay Output - C450SBN Expansion Module One Relay Output - C450SCG Expansion Module Two Low-Voltage Relay Outputs - C450SCN Expansion Module Two Relay Outputs - C450SPN Expansion Module One Analog Output - C450SQN Expansion Module Two Analog Outputs - C450YNN‐1 Power Module

System 450 Series Modular Controls Product Bulletin

Brand
PENN Controls
Product name
C450CBN Standard Control Module One Relay Output
C450CCN Standard Control Module Two Relay Outputs
C450CEN Communications Control Module for Ethernet
C450CPN Standard Control Module One Analog Output
C450CPW-400 Hybrid Control Module for EC Motor
C450CQN Standard Control Module Two Analog Outputs
C450CRN Communications Control Module for Modbus
C450RBN Reset Control Module One Relay Output
C450RCN Reset Control Module Two Relay Outputs
C450SBG Expansion Module One Low-Voltage Relay Output
C450SBN Expansion Module One Relay Output
C450SCG Expansion Module Two Low-Voltage Relay Outputs
C450SCN Expansion Module Two Relay Outputs
C450SPN Expansion Module One Analog Output
C450SQN Expansion Module Two Analog Outputs
C450YNN‐1 Power Module
Document type
Product Bulletin
Document number
LIT-12011458
Revision date
2021-07-21
Language
English

The System 450 reset control modules automatically adjust the setpoint for a supply control loop, based on input from the outdoor or ambient master sensor and the user-selected reset setpoint settings. This functions saves energy by using only the required capacity of the supply to heat, cool, dehumidify, or humidify the preferred space or environment.

See Figure 1 for an example of Setpoint Reset Control for both a chilled water temperature reset application and a boiler water temperature reset application. See Table 1 for information on the System 450 control modules with this feature.

Figure 1. Reset setpoint application for boiler water supply (BWS) and chiller water supply (CWS) showing relationships between the reset