Function
The Caleffi TankMixer™ 520_AX series kit combines a three-way
thermostatic mixing valve with a cold water tee and flexible pipe for
easy installation directly on a typical gas-fired water heater and other
water heaters that now comply with the National Appliance Energy
Conservation Act (NAECA). The TankMixer™ 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 mixing valve also features a
thermal shut-off function that operates in the event of a cold water
supply failure at the inlet. Also available as body only, for a wide
variety of separately-sourced end connections, the angle style body
design offers improved fluid dynamics for better performance and
reduces installation labor and materials, eliminating a piping elbow
in typical installations.
The valve has been specifically certified to ASSE 1017 and Low
Lead Plumbing Law by ICC-ES
.
TankMixer™ water heater tank mixing valve
520 Series
© Copyright 2017 Caleffi
NA10482
www.caleffi.com
Product range
52050_AX series kit: Adjustable three-way thermostatic mixing valve, angle body with cold water
tee and flexible connector, connections ¾” NPT female to water heater; ¾” sweat,
press, and NPT male union mix outlet/cold water inlet.
52051_AX series kit: 52050_AX series kit with mixed outlet temperature gauge.
520051A: Adjustable three-way thermostatic mixing valve, angle style body only for field installed
connection fittings, source separately, connections 1” male union.
Technical specification
Materials
-Valve and cold water tee bodies:
DZR low-lead brass
-Shutter, seats and slide guides:
PSU
-Springs:
stainless steel
-Seals: EPDM
-Adjustment knob: ABS
-Flexible pipe: stainless steel
-Recirc. port plug: low-lead brass
Performance
Suitable fluids:
water
Setting range:
5–150° F (35–65° C)
Tolerance: ±3° F (±2° C)
Max. working pressure (static): 145 psi (10 bar)
Max. working pressure (dynamic): 75 psi (5 bar)
Max. hot water inlet temperature: 195°F(90°C)
Max. inlet pressure ratio (H/C or C/H) for
optimal performance: 2:1
Min. temperature difference between hot
water inlet and mixed water outlet for optimal
performance: 27°F(15°C)
Min. flow to ensure optimal performance:
0.5 gpm (2 L/min)
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.
