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MIX

COLD

HOT

17

1

Exploded diagram

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Regulating knob

Head fixing screw

Regulating spindle

“O” Ring seal

Upper shutter seat

Thermostatic element

Inner shutter

“O” Ring

Outer shutter

“O” Ring

“O” Ring

Spring cover

Spring

Valve body

Union nut

Gasket

Tail piece body

Summary of Contents for 252169A

Page 1: ...s 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 working pressure dynamic...

Page 2: ...peratures 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 legislat...

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: ...water supplies at the inlets of the valve c Incorrect commissioning of the valve a Insufficient water supplies b Fluctuations in supply pressures temperatures c Adverse effect created by other draw o...

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