System Filling And Draining - Watts AERCO Modulex EXT Series Technical Application Manual

Modulex EXT Series Piping

SYSTEM FILLING AND DRAINING

NOTE: When reversing hydraulic and gas pipe connections, you must close up the chassis openings vacated
after the change. See Figure 13.
Figure 13: Caps and Plugs Used for Closing Up Vacated Gas
SECTION 6: SYSTEM FILLING AND DRAINING
The boiler is equipped with its own drain (see Figures 4a and 4b for the drain position). NEVER USE IT
TO DRAIN THE SYSTEM, since the system dirt could gather in the boiler and compromise its operation.
The system itself shall be equipped with its own drain, whose size will depend on the system capacity.
The application of a strainer on the return pipe to the boiler is required.
•
For filling the system, a filling tap has to be inserted on the system return pipe.
•
The filling can also be done through the draining tap on the boiler return manifold
(see drain siphon in Figure 4a and drain tap in Figure 4b).
•
In both cases, an approved hydraulic disconnection system has to be fitted.
•
Before connecting the boiler, carefully rinse out the whole system, as specified in Section 2.3 or by local
code and best practices.
TAG-0099
Application Guide
and Hydraulic Connection Openings
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
Page 27 of 37
10.07.2021