CALEFFI 5231 Series, 523168A, 523177A, 523170A, 523178A Installation And Commissioning Manual

NA10341.03

ASSE 1017

www.caleffi.com

Low lead high-flow thermostatic mixing valves

© Copyright 2018 Caleffi

5231 Series

INSTALLATION AND COMMISSIONING MANUAL

Function

The thermostatic mixing valve is used in systems producing domestic
hot water or in radiant heating systems. Its function is to maintain the
temperature of the mixed water supplied to the user at a constant set
value when there are variations in the supply pressure and temperature
of the incoming hot and cold water or in the flow rate.

The 5231 series thermostatic mixing valves are ASSE 1017 approved for
point of distribution and are designed specifically for systems requiring
high flow rates and precise, stable temperature control. Optional
stainless steel inlet port check valves are available separately, for field
installation only.

Product range

5231 series thermostatic mixing valve. NPT male and sweat union
connections, sizes 1", 1-1/4", 1-1/2", 2". Inlet port check valve s and
outlet temperature gauge optional.

Technical characteristics
Materials: - body: DZR low-lead brass (<0.25% lead content)

- shutter: PPSG40

- springs: stainless steel

- seals: peroxide-cured EPDM

- check valve extension (field installed): stainless steel

Suitable fluids: water, glycol solutions
Max. percentage of glycol: 30% glycol solution
Mixed temperature adjustment range: 95 – 150°F (32 – 66°C)
Temperature stability: ± 3°F (± 2°C)
Max. operating differential pressure (static): 200 psi (14 bar)
Max. operating differential pressure (dynamic): 75 psi (5 bar)
Hot water inlet temperature range: 120 – 195°F (49 – 91°C)
Cold water inlet temperature range: 39 – 80°F (3.9 – 26.6°C)
Max. inlet pressure ratio (H/C or C/H) for optimum performance: 2:1

Min. temp. difference between hot inlet and mixed outlet for optimum perf: 20°F (11°C)
Max. water hardness: 10 grains
Certified to:

1. ASSE 1017/CSA B125.3, certified by ICC-ES, file PMG-1357.

2. NSF/ANSI 372-2011, Drinking Water System Components-Lead Content Reduction of
Lead in Drinking Water Act, California Health and Safety Code 116875 S.3874, Reduction
of Lead in Drinking Water Act, certifed by ICC-ES, file PMG-1360.

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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 SAFET Y 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 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.

CAUTION: To prevent any damage which will cause the electronic mixing
valve to not operate correctly, treat highly aggressive water before entering the
thermostatic mixing valve.

Leave this manual for the user.

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CONSIGNE DE SÉCURITÉ

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: 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.

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 mitigeur
électronique à ne pas fonctionner correctement, le traitement de l’eau très
agressive avant d’entrer dans la vanne de le termostatico regolabile.

LAISSEZ CE MANUEL AVEC L’UTILISATEUR

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Operating principle

A thermostatic mixing valve mixes hot and cold water in such a way as to maintain a constant set
temperature of the mixed water at the outlet.
A thermostatic element is fully immersed into the mixed water. It 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 attempting to restore the original temperature setting.

The Caleffi 5231 series mixing valves require a minimum temperature dif ferential from hot inlet
to mixed water outlet of 20°F (11°C) to ensure the correct operation, and maximum pressure
difference between the hot and cold inlet parts no greater than 2:1 ratio. Softened water use is highly
recommended as the warranty is voided if used on water with hardness greater than 10 grains.

Control

The Caleffi 5231 series
mixing valves require a
minimum temperature
differential from hot inlet to
mixed water outlet of 20°F
(11°C) to ensure the correct
operation, and maximum
pressure difference

COLD

HOT

between the hot and cold
inlet par ts no greater than
2:1 ratio. Softened water

without inlet check valves

use is highly recommended
as the warranty is voided
if used on water with
hardness greater than 10
grains.

COLD

with inlet check valves (field installed)

MIXED

HOT

Check valves field installed only: code NA10366 for 1” & 1¼”
sizes; code NA10367 for 1½” & 2” sizes.

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