Starting Up: Filling And De-Aerating The Boiler; Necessary Precautions For Safety; Supply Voltage, Gas Pressure, And Water Pressure; Filling The System - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions

4.30 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)

4.30.1 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.

4.30.2 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.

4.31 FILLING THE SYSTEM

4.31.1 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 2.8.3, Water Quality Requirements.
Never use reverse osmosis, deionized, distilled water or mineral treated water for filling the
heating system.
OMM-0095_0H
GF-139
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
Page 61 of 144
09/15/2017