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10 flow and return pipe connections, 11 pressure relief valve, Modulex ext – AERCO Modulex EXT 1530 - 3060 User Manual

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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