CALEFFI SinkMixer 521201A Guide

Product range

521201A SinkMixer Under sink thermostatic mixing valve with

compression union

connections...................................................................................................................size 3/8”

SinkMixer™ Under Sink Thermostatic Mixing Valve

Technical specifications

Materials:

- Valve body, regulating spindle, spring holder and cold inlet union nut:

Low-lead brass (<0.25% lead content)

- Internal shutter: Polysulfone

- Hot inlet strainer: AISI 304 stainless steel

- Spring: AISI 302 stainless steel

- Seals: Peroxide-cured EPDM

- Cover: ABS white

- Mounting bracket and adjustment key: Polyamide Nylon

Temperature adjustment range: 95–120°F (35–50°C)

Temperature set: must be commissioned on site to achieve desired temperature

Temperature stability: ±3°F (±2°C)

Cold inlet temperature: Minimum 39°F (4°C); Maximum 85°F (29°C)

Hot inlet temperature: Minimum 120°F (49°C); Maximum 195°F (90°C)

Maximum operating differential pressure: Static: 150 psi (10 bar); Dynamic: 70 psi (5 bar)

Minimum operating differential pressure (dynamic): 1.5 psi (0.1 bar)

Maximum unbalanced dynamic supply (hot/cold or cold/hot): 2:1

Minimum temperature differential between hot water inlet

and mixed water outlet to ensure thermal shutoff function: 18°F (10°C)

Minimum temperature differential between mixed water outlet

and cold water inlet to ensure stable operation: 9°F (5°C)

Minimum flow rate for stable operation: 0.35 gpm (1.3 l/min)

Certifications:

1. ASSE 1070/CSA B125.3-2012, certified by ICC-ES, file PMG-1358.

2. NSF/ANSI 372-2011, Drinking Water Systems Components-Lead Content Reduction of Lead in

Drinking Water, California Health and Safety Code 116875 S.3874, Reduction of Lead in Drinking

Water Act, certified by ICC-ES, file PMG-1360.

3. Complies with codes IPC, IRC, UPC and NPC.

H0007288

www.caleffi.com

ASSE 1070

INSTALLATION AND COMMISSIONING MANUAL

Function

The Calefﬁ SinkMixer™ thermostatic mixing valve is used in under sink

and under counter applications where the user must be protected from

the danger of scalding caused by hot water. The Calefﬁ SinkMixer, code

521201A, provides water at a safe and usable temperature in situations

where the control of the temperature of the water discharging from a

terminal ﬁtting is of the utmost importance, i.e. within hospitals, schools,

nursing homes, etc. The valve is designed to prevent the ﬂow of water

discharging from the mixed water outlet in the event of the failure of hot

or cold supply. It is compact for easy installation and includes a cold

water outlet to the ﬁxture eliminating the need for additional piping and

a tee for standard three-port mixing valves. It has integral check valves

on the hot and cold inlets and is certiﬁed to Low Lead Plumbing Law by

ICC-ES, ASSE 1070 listed (temperature cannot exceed 120°F).

CAUTION: If the thermostatic mixing 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 thermostatic mixing valve 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 mixing

valve, take the necessary precautions to ensure that such temperatures do

not endanger people.

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.

CAUTION: To prevent any damage which will cause the thermostatic mixing

valve to not operate correctly, treat highly aggressive water before entering the

thermostatic mixing valve.

WARNING: This product can expose you to chemicals including lead, which is

known to the State of California to cause cancer and birth defects or other

reproductive harm. For more information go to www.P65Warnings.ca.gov.

ATTENTION: Lorsque vous effectuez les raccordements d'eau, assurez-vous

que la tuyauterie reliant le termostatico regolabile n'est pas mécaniquement

des overstressed. Au fil du temps, ceci pourrait causer des ruptures, avec

pour consequence des pertes en eau qui, à leur tour, peuvent causer des

dommages à la propriété et/ou les gens.

Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant

instructions. Lorsqu'il est utilisé, ce symbole signifie.

ATTENTION! DEVENEZ ALERTE ! VOTRE SÉCURITÉ EST EN JEU ! NE PAS SUIVRE CES

INSTRUCTIONS PEUT PROVOQUER UN RISQUE DE SECURITE.

ATTENTION: Tous les travaux doivent être effectués par du personnel

qualifié formé à la bonne application, installation et maintenance des systèmes

conformément aux codes et règlements locaux.

ATTENTION:Si le réducteur de pression, termostatico regolabile, n'est pas installé,

mis en service et entretenu correctement, selon les instructions contenues dans ce

manuel, il peut ne pas fonctionner correctement et peut mettre en danger l'utilisateur.

ATTENTION: S'assurer que tous les raccordements sont étanches.

ATTENTION: Les températures de l'eau supérieure à 100°F (38°C) peut

être dangereux. Au cours de l'installation, mise en service et l'entretien de

le réducteur de pression, le termostatico regolabile, prendre les precautions

nécessaires afin de s'assurer que de tells températures ne compromettent

pas les gens.

ATTENTION: Pour prévenir tout dommage qui provoque le termostatico

regolabile à ne pas fonctionner correctement, le traitement de l’eau très

agressive avant d’entrer dans la vanne de le termostatico regolabile.

CONSIGNE DE SÉCURITÉ

LAISSEZ CE MANUEL AVEC L’UTILISATEUR

AVERTISSEMENT:

Ce produit peut vous exposer à des produits chimiques comme

le plomb, qui est connu dans l’État de Californie pour causer le cancer, dommages

à la naissance ou autre.

Pour plus d’informations rendez-vous www.P65Warnings.ca.gov.

Thermal shutoff

In the event of a failure of the hot supply port, the piston closes the cold supply port. Similarly, if

the cold water supply fails, the piston closes the hot supply port. The Caleffi 521201A thermostatic

mixing valve requires a minimum temperature differential from hot inlet to mixed water outlet of

18°F (10°C) to ensure the correct operation of the thermal shutoff feature.

Operating principle

The thermostatic mixing valve mixes hot and cold water in such a way as to maintain constant

set temperature of the mixed water at the outlet. A thermostatic element is fully immersed into the

mixed water. This element then contracts or expands causing movement of the piston, closing

either the hot or cold inlets, regulating the ﬂow rates entering the valve. If there are variations of

temperature or pressure at the inlets, the internal element automatically reacts to restore the original

temperature setting. In the event of a failure of either the hot or cold supply, the piston will shut off,

stopping water discharging from the mixed water outlet.

COLD INLET

HOT INLET

MIX OUTLET COLD OUTLET

Flow curve

0.1

0.2

0.3

0.5

p (psi)

G(l/min)(

gpm

)

0.1

0.2

0.3

0.5

(psi) (bar

)

0.01

0.1

0.02

0.03

0.05

1.0

0.2

0.3

0.5

0.4 0.4

0.04

0.4

Kv=.45

Cv= .52

Use

The Caleffi 521201A SinkMixer thermostatic mixing valve is intended for use in under sink and

under counter applications in accordance with installation rules and indications specified in ASSE

1070 standards.

The system must be sized taking into account the current legislation with regard to the nominal

flow rate of each outlet.

The SinkMixer is used to prevent accidental scalding with the outlet water temperature properly

adjusted using a thermometer at the faucet to measure the desired temperature.

Flow should never exceed standards for pipe size and materials.

Dimensions

Replacement parts

Replacement check valve and strainers for

521201A under sink thermostatic mixing valves.

F0001270.........check valve and two strainers,

one set for the cold inlet port and one set for the

hot inlet port.

DESCRIPTIONCODE

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Attention, document managed by software system: in case of external distribution, its update and validity must be checked at any need. Hand changes are forbidden.

Questo documento non è da ritenersi impegnativo. Ci riserviamo il diritto di modicare i nostri prodotti, di apportare miglioramenti tecnici e di svilupparli ulteriormente. Attenzione,

This document can not be considered binding. We reserve the right to change our products, to produce technical improvements and to further develop them.

1234

ABCDEF

E D C B A

1234

1 3/8”

3 1/2”

3/8” compression* 3/8” compression*

3/8” compression* 3/8” compression* 1 1/16”

3 3/16”

MIX SOTTOLAVABO 30-50°C(90-120°F) 521201A

Code 521201A 0.5 lb /0.3

*Actual thread is 9/16” - 24 UNEF.

Installation

The following instructions must be read prior to the installation of a Caleffi 521201A SinkMixer thermostatic

mixing valve. The installer should also be aware of his responsibility and duty of care to ensure that all

aspects of the installation comply with current regulations and legislation. The Caleffi 521201A should

be installed using the appropriate standard, code of practice and legislation applicable to each state and

following the details in this manual. The Caleffi 521201A series must be installed by a licensed plumber.

Prior to the installation of the Caleffi 521201A valve, the system must be checked to ensure that the

system operating conditions fall within the recommended operating range of the valve, i.e.

verify supply temperatures, supply pressures, risk assessments, etc.

The supply system into which the Caleffi 521201A is to be installed must be thoroughly flushed and

cleaned to remove any debris which may accumulate during the installation. Failure to remove any debris

will affect the performance and the manufacturer’s warranty on the product. In areas that are subject to

high levels of aggressive water, provision must be made to treat the water prior to it entering the valve.

The valve is recommended to be installed in a position orieinted with the cover to the right with cold inlet/

outlet on the right side (allowing direct connection to the sink’s cold water inlet fitting) resulting in the hot

inlet/mix outlet on the left aligning direct to the hot water inlet sink fitting. It is essential that the access to

the valve is not obstructed for future maintenance that may be required to the valve or associated fittings.

It is essential that when the installation is designed and/or installed, all current legislation is noted, e.g. the

maximum distance from the outlet of the valve to any terminal fitting.

The connecting hot and cold water supplies must be connected to the valve strictly in accordance with

the indications on the body of the valve. The inlets of the valves are clearly marked with the letter H (Hot)

and C (Cold). The outlet is marked with the word MIX. The valve has male 3/8” compression threads for

conection to standard 3/8” compression faucet connectors and stops.

Where one or both the incoming supply pressures are excessive, a Caleffi pressure reducing valve should

be installed to reduce the pressure(s) within the limits.

The Caleffi 521201A valve is supplied complete with the check valves at the hot and cold inlets.

Mount the 521201A valve to the wall underneath the sink with black plastic mounting bracket supplied

with valve but not attached. Use mounting screw to attach the mounting bracket to the valve to meet

the orientation described above. Break off the adjustment key for adjusting the termperature, see

commisioning section.

To ensure that the performance of the Caleffi 521201A valve is maintained (in the event of cold water

failure), the temperature of the hot water supply at the point of entry to the valve must be a minimum of

18°F higher than the set mixed water discharge temperature.

If the valve is not installed correctly, it will not function correctly and may put the user in danger.

Installation diagram

COLD

HOT

Point of use

Commissioning

Upon completion of the installation, the valve should be tested and commissioned as per the

procedure outlined below or as specified by the local authority.

The following instructions should be read and understood prior to commissioning the Caleffi

521201A thermostatic mixing valve. If, under any circumstances, there are aspects of the

installation/system which do not comply with our requirements or the specifications as listed, the

valve must not be put into service until the installation/system does comply.

1) Ensure that the system is throughly clean and free from debris prior to commissioning the

thermostatic mixing valve.

2) Use a suitably calibrated, accurate digital thermometer to commission temperatures by

measuring the mixed water temperature at the outlet.

3) In accordance with the anti-scald requirements, water installation shall deliver hot water at

the outlet of the sanitary fixtures used primarily for personal hygiene purposes at a

temperature not exceeding 120°F (49°C) or as specified by authority having jurisdiction.

4) The temperature at the outlet of each valve must be set taking into consideration any

fluctuations which may occur within the system due to simultaneous demand.

5) Once the supply temperatures are stabilized and the normal operating conditions are

established, the valve can be commissioned. The temperature setting can be adjusted by with

the black plastic adjustment 1/4” hex key, included separately in the box.

Break off from the mounting bracket. Use the following sequence when commissioning the

valve.

a) Using a thermometer, measure the temperature of the sink faucet discharge with the

hot tap open, cold tap closed. The temperature should not exceed the temperature

allowed by the applicable standard or code of practice for each state.

b) Adjust mixing valve to desired faucet discharge temperature, with provided 1/4” hex

key.

c) Perform the thermal shut-off test. Isolate the cold water supply to the Caleffi valve

and monitor the mixed water temperature. The outlet flow should quickly cease

flowing.

d) Restore the cold water supply to the valve and measure and record the outlet

temperature after the mixed water temperature has stabilized. The final temperature

found during this test should not exceed the permitted values ±3°F.

6) Once the desired temperature has been reached, remove the adjustment key and store in a

safe place that can be located if required in the future.

We recommend that the above information is recorded in the Commissioning Report and updated

on the Service Report when any work is performed on the valve.

Temperature adjustment

COLD

HOT

MIX

Remove 1/4” hex key from mounting

bracket.

Remove white cap.

Adjust temperature setting with 1/4” hex key. After

adjustment, lock the temperature with locking nut.

Replace cap and store key in safe place.

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