Honeywell W7100G User Manual

PRODUCT DATA
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved 63-4046—1
W7100G
Discharge Water
Temperature Control
APPLICATION
The microprocessor-based W7100G Discharge Water
Temperature Control maintains an average discharge
water temperature for reciprocating chiller applications, by
staging on and off compressors or unloaders as required.
The W7100 can provide up to 10 stages of cooling using a
W7101 Satellite Sequencer.
FEATURES
• Up to six stages of cooling provided.
• Expandable system up to 10 cooling stages using a
W7101.
• Advanced proportional plus integral microprocessor
control algorithm minimizes droop.
• Soft start to minimize compressor cycling during
system start up.
• Adjustable minimum on/off timing and time delay
between stages of either 30 or 60 seconds.
• Adjustable setpoint from 10 to 110°F (-12 to 43°C).
• Adjustable reset differential from 5 to 20°F (3 to 11K).
• Adjustable control band from 0 to 10°F (0 to 6K).
• Reset signal from either an outdoor air or space
sensor.
• C7170 sensor can be used for sensing water
temperature.
• LED show which stages of cooling are energized.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Operation .......................................................................... 6
Settings and Adjustments ................................................. 8
System Checkout ............................................................. 9
Troubleshooting ................................................................ 10

Honeywell W7100G Specifications

General

Brand	Honeywell
Model	W7100G
Category	Temperature Controller
Language	English

Summary

Features

Application

Specifications

Additional System Components

Lists system components required for proper operation of the W7100G.

Accessories

Lists optional accessories available for the W7100G controller.

Ordering Information

Installation

Location and Mounting

Guidance on selecting a location and physically mounting the controller.

Wiring

Details the W7100G wiring and hookup diagram for system connections.

Changing Number of Controlled Stages

Explains how to configure the controller for a specific number of cooling stages.

Operation

Discharge Water Temperature Control Operation

Describes the W7100G's control logic for stable discharge water temperature.

Reset of Discharge Water Temperature

Discusses adjusting setpoints based on space or outdoor air conditions.

Space Reset Algorithm

Illustrates the algorithm for setpoint reset based on space temperature readings.

Outdoor Resets

Covers using outdoor air temperature for setpoint reset and associated wiring.

W7100 LED Operation

Explains the function and meaning of the W7100 controller's status LEDs.

Reset Modifications

Details methods to adjust outdoor air reset start/stop temperatures using resistors.

Settings and Adjustments

Setpoint Knob

Provides typical setpoint ranges for HVAC and industrial applications.

Reset Knob

Offers recommendations for reset ranges in HVAC applications.

Control Band Knob

Explains how to set the control band for optimal system response and stability.

Fast Response Input

Details jumper settings to select minimum ON/OFF timings (30 or 60 seconds).

Number Of Stages

Instructs on selecting and installing resistors to define the number of controlled stages.

System Checkout

Troubleshooting