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CAUTION:

If the thermostatic mixer 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:

If installing in an ASSE 1017 application, check valves shall

be used.

CAUTION:

When making the water connections, make sure that the mixer

connecting pipework 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 can be dangerous.

During

the

installation,

commissioning

and

maintenance

of

the

thermostatic mixer, take the necessary precautions to ensure that such

temperatures do not endanger people.

CAUTION:

In the case of highly aggressive water, arrangements must be

made to treat the water before it enters the thermostatic mixer, in

accordance with current legislation. Otherwise the mixer may be damaged

and will not operate correctly.

Leave this manual for the user.

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.

Summary of Contents for 2521 Series

Page 1: ...rials Body Low lead brass 0 25 Lead content chrome plated Shutter PSU Springs Stainless steel Seals EPDM Setting range 85 150 F 30 65 C Accuracy 3 F 2 C Max working pressure static 200 psi 14 Bar Max...

Page 2: ...ommissioning and maintenance of the thermostatic mixer take the necessary precautions to ensure that such temperatures do not endanger people CAUTION In the case of highly aggressive water arrangement...

Page 3: ...een the hot and cold water passages Even when there are pressure drops due to the drawing off of hot or cold water for other uses or variations in the incoming temperature the mixer automatically regu...

Page 4: ...diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Regulating knob Head fixing screw Regulating spindle O Ring seal Upper shutter seat Thermostatic element Inner shutter O Ring Outer shutter O Ring O...

Page 5: ...manual taking into account all current applicable standards Caleffi 2521 series mixing valve can be installed in any position either vertical or horizontal The following are shown on the valve body H...

Page 6: ...agrams COLD BLUE HOT RED MIX Key to symbols Safety relief valve Isolation and check valve Isolation valve Expansion vessel Filter HOT COLD MIX MIN MAX 7 1 2 HOT COLD CALEFFI MIN MAX 7 1 2 T Normally c...

Page 7: ...red Unscrew the head screw pull off the handle and reposition it so that the handle fits into the internal slot of the knob Tighten the head screw Maintenance In service tests should be carried out re...

Page 8: ...oad Milwaukee WI 53208 T 414 238 2360 F 414 238 2366 CALEFFI Safety The thermostatic mixer must be installed by a licensed plumber in accordance with national regulations and or relevant local require...

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