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30 starting up: filling and de-aerating the boiler, 1 necessary precautions for safety, 2 supply voltage, gas pressure, and water pressure – AERCO Modulex EXT 1530 - 3060 User Manual

Page 57: 31 filling the system, 1 necessary precautions while filling the system, Modulex ext

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MODULEX EXT

1530, 1912, 2295, 2677, 3060 BOILERS

Installation, Operation & Maintenance Manual

3.30 Starting Up: Filling and De-Aerating the Boiler

Carry out the following tasks in connection with maintenance, etc. to an already installed unit:

Shut down all programs

Close the gas shutoff valve upstream from the boiler

Shut off the power at the main power switch

Close the C/H service valves (supply and return)

3.30.1 Necessary Precautions for Safety

The following safety rules

MUST be observed:

All work on the unit must take place in a dry environment.

AERCO units should never be in operation without their cover panels, except in connection

with maintenance or adjustments.

Never allow electrical or electronic components to come into contact with water.

3.30.2 Supply Voltage, Gas Pressure, and Water pressure

The unit must be able to function during maintenance procedures or when adjustments are

performed. For this reason, the unit’s supply voltage, gas pressure and water pressure must be

maintained and available during these activities.

WARNING!

Following maintenance or other activities, always check the integrity

of all parts through which gas flows with a bubble test using soap

spray to ensure there are no gas leaks.

3.31 Filling the System

3.31.1 Necessary Precautions While Filling the System

Do not mix the C/H system’s water with anti-freeze or anti-corrosion solutions using incorrect

concentrations! Doing so can cause damage to the gaskets and might cause noise during normal

boiler operation.

WARNING!

AERCO refuses all liability for injury to persons, animals or damage

to property deriving from not having respected the above mentioned

recommendations.

Before filling the heating system, the complete system, including all zones, must be thoroughly

cleaned and flushed to remove sediment.
Flush until clean water runs free of sediment. AERCO suggests using an approved system

cleaner to flush the system, but not the boiler. Always use AERCO approved antifreezes. See

the list in Section 1.9.3, Water Quality Requirements.
Never use reverse osmosis, deionized, distilled water or mineral treated water for filling the

heating system.

OMM-0095_0E

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

Page 57 of 138

GF-139

Phone: 800-526-0288

12/01/14