AERCO Modulex EXT 1530 - 3060 - Manual (Page 29)

MODULEX EXT 1530, 1912, 2295, 2677, 3060 BOILERS
Installation, Operation & Maintenance Manual
3.10 Flow and Return Pipe Connections
The cold and hot water flow and return circuits must be connected to the boiler via the
respective 4” M and R connections as indicated in Table 2-1.
When determining the size of the cold/hot water circuit pipes it is essential to bear in mind the
pressure losses induced by any of the system’s components and by the configuration of the
system.
When planning the routing of the cold/hot water piping, take the necessary precautions to avoid
air traps and pockets and to facilitate the continuous purging of the system.
WARNING!
• Before installing the boiler we recommend that the system is
flushed out with a suitable cleaning product in order to eliminate
any metallic tooling or welding residues, or oil and grime, which
could reach the boiler and affect the proper functioning of the
boiler.
• Ensure that the system piping is NOT used for earth grounding
of electrical or telephone systems. Such grounding of system
piping is unsuitable and can cause serious damage to the
piping, boiler, and radiators.
• IT IS ABSOLUTELY FORBIDDEN TO FIT ON-OFF VALVES IN
THE PIPING BEFORE THE REQUIRED SAFTEY DEVICES.
3.11 Pressure Relief Valve
A pressure relief valve (Figure 3-5) must be fitted on the CSD-1 manifold. It must be
dimensioned for the capacity of the boiler and must comply with the ANSI/ASME ANSI Z21.13 /
CSA 4.9 Boiler and Pressure Vessel Code, Section IV (‘’Heating Boilers’’), or CSA B51, Boiler,
Pressure vessel, and Pressure Piping Code, as applicable.
The boiler ships with an 80 psi pressure relief valve for installation into the CSD-1 manifold
header. Lower system pressures will require lower rated pressure relief valves (not supplied).
Figure 3-5: Pressure Relief Valve
OMM-0095_0E AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 29 of 138
GF-139 Phone: 800-526-0288 12/01/14