Caleffi 551004A User Manual

www.caleffi.com

CALEFFI

High-performance automatic air vent

38572.01

© Copyright 2009 Caleffi

Function

The DISCALAIR is a high performance automatic air vent that is capable of
releasing large amounts of air from hydronic systems. The venting mechanism
is the same proven design that is used in Caleffi's 551 series air separators,
providing years of reliable service.

Product range

Code 551004A DISCALAIR high performance automatic air vent

Technical specification

Connections:

Materials: - Body brass

Suitable fluids: water, glycol solution
Max percentage of glycol: 50%

Max working pressure: 150 psi (10 bar)
Max discharge pressure: 150 psi (10 bar)

Temperature range: 32÷250°F (0÷120°C)

551 Series

size 1/2” NPT female

1/2”

NPT female

- Float PP

- Stem brass

- Seals EPDM

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SAFETY INSTRUCTION

This safety alert symbol will be used in this manual to draw attention to safety related
instructions. When used, the safety alert symbol means ATTENTION! BECOME ALERT!

YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN A SAFETY HAZARD.

CAUTION: All work must be performed by qualified personnel trained in the

proper application, installation, and maintenance of systems in accordance
with all applicable codes and ordinances.

CAUTION: If the Discalair valve is not installed, commissioned and
maintained properly, according to the instructions contained in this
manual, it may not operate correctly and may endanger the user.

CAUTION: Make sure that all the connecting pipework is water tight.

CAUTION: When making the water connections, make sure that the

pipework connecting the Discalair is not mechanically over-stressed. Over
time this could cause breakages, with consequent water losses which, in
turn, could cause harm to property and/or people.

CAUTION: Water temperatures higher than 100°F (38°C) can be
dangerous. During the installation, commissioning and maintenance of the
Discalair valve, take the necessary precautions to ensure that such
temperatures do not endanger people.

Leave this manual for the user.

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