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3 service relay requirement, 4 electrical requirements, Modulex ext – AERCO Modulex EXT 1530 - 3060 User Manual

Page 45

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MODULEX EXT

1530, 1912, 2295, 2677, 3060 BOILERS

Installation, Operation & Maintenance Manual

WARNING!

DANGER OF FATAL ACCIDENT DUE TO ELECTRIC SHOCK!

120 VAC connections may be present on the external connection

board when power is supplied to the boiler.
The electrical connections must be carried out only by a qualified

person. Before carrying out the connections or any other operation

on the electrical parts, always switch off and disconnect the

electricity supply and ensure for yourself that it cannot be

accidentally turned on.

3.24.3 Service Relay Requirement

Upstream of the electrical connection, a service relay is required (not supplied) which, when the

additional electrical safety devices intervene, shuts down the electrical supply to the on-off fuel

valve fitted on the gas supply circuit, but NOT to the boiler, so as to guarantee the running of the

pump and permit the boiler to cool down.

3.24.4 Electrical Requirements

No changes may be made to the wiring of the boiler.

All connections should be designed in accordance with the applicable regulations.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause

improper and dangerous operation.

NOTE

Verify proper operation of the boiler after all servicing operations.

OMM-0095_0E

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913

Page 45 of 138

GF-139

Phone: 800-526-0288

12/01/14