Caleffi MINICAL, 5020, 5021 User Manual

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CALEFFI

MINICAL®Automatic Air Vent
Automatic Air Vent with check valve

48205

© Copy right 20 10 C ale ff i

Function

Float type automatic air vent designed to vent air that is released
from the water while being heated. Check valve on 5021 series
allows for easy replacement of air vent without purging the system.

Product range

Code 502015A MINICAL Automatic Air Vent 1/8" NPT
Code 502115A MINICAL Automatic Air Vent 1/8" NPT with Check Valve

Technical Characteristics

Connection: 1/8” NPT Male
Material: Body Brass

Seals EPDM
Maximum Working Pressure: 150 psi (10 bar)
Maximum Venting Pressure: 37 psi (2,5 bar)
Maximum Working Temperature: 250°F (120°C)

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.

5020-5021 Series

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: Over-tightening and breakage can occur with the use of Teflon
pipe joint compounds. Teflon®provides lubricity so that care must be
exercised not to over-tighten joints. Failure to follow these instructions
could result in property damage and /or personal injury.

WARNING: System fluids are under pressure or temperature can be
hazardous. Be sure the pressure has been reduced to zero and the
system temperature is below 100°F (38°C). Failure to follow these
instructions could result in property damage and/or personal injury.

®

Installation

CALEFFI

The vent is installed in the vertical position, on the air
separator, on manifolds, on riser pipes and generally in
parts of the system where a concentration of air pockets is
to be expected.
Check valve on 5021 series should be installed prior to air
vent. Insure air vent is properly lined-up with female check
valve guide.

WrongCorrect

CAUTION:

air vent if dirt, scale, pipe joint compound or any other foreign materials
becomes trapped in the operating mechanism. Keep vent cap closed
during filling to prevent dirt from flowing into vent mechanism. Failure to follow
these instructions could result in property damage and/or personal injury.

Operation Instructions

The automatic air vent can be used for manual or automatic venting of sealed hydronic
systems.

• To manually operate, press down on the vent stem.

• For normal automatic venting, open cap one full turn for a slow release of air. A fast release
of the air will allow dirt or scale in the water to plug the operating mechanism. The small hole
in the side of the cap allows air to escape.

• To shutoff automatic air vent, screw cap down tight.

CAUTION:

Periodically inspect for signs of corrosion or leakage. If corrosion or
leakage is note, the vent must be replaced. Failure to follow these
instructions could result in property damage and/or personal injury.

Service Instructions

There is no service required for the automatic air vent.

Uncontrolled venting of water can occur with the automatic

Corrosion or leakage can cause damage or injury.

Caleffi North America, Inc.
3883 West Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366