Product Overview

ManualsBrandsCaleffi ManualsHeating Supplies1" PEX Crimp MIXCAL 3-Way Adjustable Thermostatic and Pressure Balanced Mixing Valve w/ Check Valve

CALEFFI

ISO 9001 No. 0003

ACCREDITED

ISO 9001 FM 21654

MixCal

™

Adjustable three-way

thermostatic mixing valve

521 series

01050/17 NA

Function

The Calefﬁ MixCal

™

521 series three-way thermostatic mixing valve

is used in systems producing domestic hot water or in hydronic and

radiant heating systems. It maintains the desired output temperature

of the mixed water supplied at a constant set value compensating for

both temperature and pressure ﬂuctuations of the incoming hot and

cold water.

The valve has been speciﬁcally certiﬁed to ASSE 1017 and Low Lead

Plumbing Law by ICC-ES.

Product range

521___A series Adjustable three-way thermostatic mixing valve ............ connections ½", ¾", 1" NPT male union, sweat union and press union

521___AC series Adjustable three-way thermostatic mixing valve

with inlet port check valves .....................................................................connections ½", ¾", 1" NPT male union, sweat union

5215_6AC Adjustable three-way thermostatic mixing valve with inlet port check valves ................................. connections ¾" press union

521101A Adjustable three-way thermostatic mixing valve,

(replacement body) ................................................................. connections 1" male union thread with no ﬁttings or union nuts

Technical specications

Materials

- Body: low-lead brass (<0.25% Lead content)

- Shutter, seats and slide guides: PPO

- Springs: stainless steel

- Seals: Peroxide-cured EPDM

Performance

Suitable ﬂuids: water, glycol solution

Max. percentage of glycol: 30%

Setting range: 85–150° F (30–65° C)

Tolerance: ±3° F (±2° C)

Max. working pressure: 200 psi (14 bar)

Max. operating differential pressure: 75 psi (5 bar)

Max recommended differential pressure: 20 psi (1.5 bar)

Max. hot water inlet temperature: 200° F (93° C)

Max. inlet pressure ratio (H/C or C/H) for optimum performance: 2:1

Minimum temperature difference between

hot water inlet and mixed water outlet

for optimal performance: 27° F (15° C)

Minimum ﬂow to ensure optimal performance: 1.0 gpm (3.8 L/min)

Minimum flow rate when recirculation flow rate is 1 gpm or greater:

0 gpm (0 L/min)

Replaces 01050/16 NA

Certifications:

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, certified by

ICC-ES, file PMG-1360.

Connections

- NPT male union: ½", ¾", 1"

- sweat union: ½", ¾", 1"

- press union: ½", ¾", 1"

- lay length-hot to cold inlet

(press connections):

size ½ inch: 3

⁄8

size ¾ inch: 3

⁄8

size 1 inch: 4

⁄8

Summary of content (7 pages)

PAGE 1
MixCal Adjustable three-way thermostatic mixing valve ™ CALEFFI 521 series 01050/17 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Replaces 01050/16 NA Function The Caleffi MixCal™ 521 series three-way thermostatic mixing valve is used in systems producing domestic hot water or in hydronic and radiant heating systems.
PAGE 2
Dimensions NPT & Press connections Laylength (press) C D* F ⁄ 2" 1 521400AC 1 521410A** 1 521410AC** 1 521500A 3 521500AC 3 521510A** 2 5⁄8" Wt. (lb.) A MAX 7 A F E MIN MIX MIX E MIX D E D A E A 110 130 150 110 130 90 ϒF 150 90 170 ϒF 70 170 70 190 50 190 50 30 210 30 210 A A A Code A B C D* E F Wt. (lb.) ⁄ 2" 2 1⁄4" 41⁄ 2" 5 5⁄8" 31⁄8" 25⁄8" 2.4 ⁄ 2" 1 2 ⁄4" 1 4 ⁄ 2" 7" 1 4 ⁄ 2" 5 2 ⁄8" 2.
PAGE 3
Temperature — exposure time Legionella-scalding risk 170 In systems producing domestic hot water with storage, in order to avoid the dangerous infection known as Legionella, the hot water must be stored at a temperature of at least 140°F. At this temperature it is certain that the growth of the bacteria causing this infection will be totally eliminated. At this temperature, however, the water cannot be used directly. Total burning 160 150 Partial burning 140 130 Safety condition.
PAGE 4
Flow curve Installation ∆p (ft of head) (psi) 161 115 70 50 46 20 23 10 11.5 9.2 6.9 4.6 5 4 3 2 2.3 1 1.15 0.92 0.69 0.46 0.5 0.4 0.3 0.2 0.23 0.1 0.1 0.05 0.04 0.03 0.02 0.01 0.005 0.004 0.003 0.002 0.001 G (l/min) (gpm) 50 20 70 100 140 190 10 50 5 20 2 10 1 0.5 0.5 0.2 0.1 0.05 0.2 0.1 0.01 0.05 0.023 0.02 2.0 0.5 0.4 0.3 0.2 0.05 0.04 0.03 0.02 Kv = 2.6 5.0 1.0 0.115 0.092 0.069 0.046 Cv = 3.
PAGE 5
Replacement fittings 1/2 inch Item Description Qty per valve Union washer 3 Union nut 1" 3 3/4 inch 1 inch NPT Sweat Press NPT Sweat Press NPT Sweat Press 521400A, AC 521409A, AC 521406A 521500A, AC 521509A, AC 521506A,AC 521600A, AC 521609A, AC 521606A 521410A, AC 521419A, AC 521416A 521510A, AC 521519A, AC 521516A,AC 521610A, AC 521619A, AC 521616A F50055 F61008 F61008 R31981 NA10002 (2 only – “410”) (2 only – “419”) NA16264* F61008 31901A NA10003 NA16265
PAGE 6
Recirculation with point-of-distribution thermostatic mixing valves For domestic recirculating water systems that include a single ASSE 1017 point-of-distribution thermostatic mixing valve, such as the Caleffi MixCal™ 521 series, the piping installation below is recommended. In any recirculating hot water distribution system there will be times when the circulator is operating, but no hot water is being drawn at the fixtures.
PAGE 7
HOT Check valve Expansion vessel BOILER Radiant heating system Filter MI X COLD Application diagrams 4 3 MIX 2 Isolation valve Pump 10 8 6 4 2 10 8 6 4 2 10 8 6 4 2 10 8 6 4 2 10 8 6 4 2 10 8 6 4 2 0 0 0 0 0 0 CALEFFI CALEFFI 2 CALEFFI HOT CALEFFI CALEFFI 4 3 MIX CALEFFI MI X COLD BOILER Domestic hot water system without recirculation Keys to symbols Safety r elief valve Check valve * Isolation valve MIX 4 3 2 Expansion vessel Filter WATER HEA TER Pump * WATE