User Guide

Installation

DISCALDIRT

and DISCALDIRTMAG

units may be used in both heating and cooling systems, to

ensure continuous air and dirt elimination. The units should be installed after the boiler and on the

pump suction side, as these are the points where the formation of micro-bubbles is greatest.

DISCALDIRT

and DISCALDIRTMAG

air and dirt separators must be installed vertically. In

installation conditions where inspection is not possible, it is recommended that the venting valve

cap is replaced by a Calefﬁ part number R59681 hygroscopic safety vent. The standard replacement

cap code number is 59199.

CHILLER

Maintenance

The DISCALDIRT

and DISCALDIRTMAG

air

and dirt separator is designed to be maintained

and cleaned without removing it from systempip-

ing. The automatic air vent, located at the top of the

device, has a long chamber for ﬂoat movement (2). This prevents any impurities in the water from

reaching the seal seat. The corrosion resistant stainless steel pinned linkage and PP ﬂoat can be

accessed by removing the upper cover (1). The stainless steel ﬂoat guide pin (4) prevents the ﬂoat

from jamming against the inside housing, sticking due to accumulating residue in the ﬂowing ﬂuids, in

non-vertical installations or from boiler or chiller residue buildup. Unscrew the top part of the casing

(3) to clean the entire air ventingsystem. The air venting system in the brass DISCALDIRT

and DISCALDIRTMAG

and steel

DISCALDIRT

and DISCALDIRTMAG

air and dirt separators features a pinned

float. Steel DISCALDIRT

546

a n d NA546 series and DISCALDIRTMAG

NA546_M series air and dirt s ep ar a to rs

with ﬂanged and threaded connections

have an integral side drain port with shut-

off valve, code 538402 FD (5), which has

two functions:

1. Air removal while filling the system

during system commissioning.

2. Debris removal that ﬂoat within the air

separator.

CHILLER