How Electrical On-Delay Staging Relays Work

By Dave Rongey
Summary: This section will cover the use of relays that are sometimes needed to control special device loads such as Air Conditioners and other high demand equipment from starting at the same time.

Problem Solvers for Air Conditioners - Energy Savers for Large Electrical Loads

This method will help prevent nuisance tripping of sub-feed circuit breakers and reduce the electrical demand on your utility service which could lead to much higher energy bills.

Introduction:
ICM100/101 DELAY ON MAKE
• 3 or 5 minute fixed
• Works with anticipator thermostats

MODE OF OPERATION:
When power is applied to the input, the
time delays begins. After the time delay is
complete, the load energizes and remains
energized as long as power is applied.
The control is reset by removing power
during or after the time delay period.

INSTALLATION

1. Disconnect power.

2. Connect terminals in series with the
starting device as shown in the wiring
diagram below.

3. Reapply power, check operation.

4. Trickle current bypass resistor
T1 to T3 <1K ohm.

2-Wire Compressor Staging/Startup Delay Timer:

SPECIFICATIONS
Input:
• Voltage: 18-30 VAC
• Frequency: 50/60 Hz
Output:
• Output Ratings:
– Maximum: 1.5 amps
– Minimum: 40 mA
– Inrush: 15 amps
Time Delay
• 3 or 5 minute fixed

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Questions and Answers about Control Relays

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Electrical Project Skill Level:
Intermediate to Advanced - Electrical Repairs and Circuit Wiring is Best Performed by a Licensed Electrical Contractor.
Electrical Tools Required:
Basic Electricians Pouch of Hand Tools, a Voltage Tester and a Multi Meter.
Estimated Time:
Depends on personal level experience, ability to work with tools, work with electrical circuit wiring, and the available access to the project area.
Electrical Safety:
Identify the electrical circuit, turn it OFF and Tag it with a Note before working with the wiring.
Electrical Control Parts and Materials:
Electrical parts and materials for control wiring projects should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections:
Modifying existing electrical circuits or installing additional electrical wiring should be done according to local and national electrical codes with a permit and be inspected.

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How Electrical On-Delay Staging Relays Work

Problem Solvers for Air Conditioners - Energy Savers for Large Electrical Loads

2-Wire Compressor Staging/Startup Delay Timer:

See How to Wire it Right!

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