Product Overview

ManualsBrandsCaleffi ManualsHeating Supplies1-1/4" Male NPT ThermoMix Thermostatic Mixing Valve (140°F)

CALEFFI

ACCREDITED

ISO 9001 No. 0003

ISO 9001 FM 21654

ThermoProtec

™

boiler protection

high-ﬂow thermostatic mixing valve

280 series

01223/17 NA

Function

The ThermoProtec

™

boiler protection high-ﬂow thermostatic mixing

valve is used in hydronic heating systems with non-condensing boilers,

including solid fuel, biomass, gas, LP or oil-ﬁred. It can be installed with

steel, cast iron and copper tube style boilers, automatically controlling

the return water temperature, preventing condensation of the water

vapor contained in the ﬂue gas. The 280 series ThermoProtec

™

valve

mixes by-pass ﬂow from the boiler with return ﬂow from the system,

sending a ﬁxed temperature ﬂow to the boiler which protects against

corrosion from condensation occurring when a minimum flue gas

temperature is not otherwise maintained.

Changeable thermostatic sensor cartridge changes valve temperature

setting. The thermostatic sensor cartridge can easily be removed for

maintenance or to change the valve set temperature, with out removing

the valve body from the piping.

Product range

280 series ThermoProtec

™

boiler protection valve .........................................................................connections 1" and 1-1/4" NPT male or sweat union

Technical speciﬁcations

Materials - body: brass

- lower body plug: brass

- shutter: PSU

- spring: stainless steel

- seal: EPDM

- union seals: ﬁber

- thermostatic sensor: wax

Performance

Suitable ﬂuids: water, glycol solutions

Max. percentage of glycol: 50%

Max. working pressure: 150 psi (10 bar)

Working temperature range: 40–212°F (5–100°C)

Thermostatic sensor cartridge: 130°F (55°C) Tset standard

Optional cartridges Tset (ﬁeld replaceable): 115°F (45°C)

140°F (60°C)

160°F (70°C)

Sensor cartridge accuracy: ±4°F (±2°C)

By-pass closed temperature: Tset +18°F (+10°C)

Fully open ﬂow characteristic: 10 Cv (size 1")

14 Cv (size 1-1/4")

Connections: - NPT male union: 1" and 1-1/4"

- sweat union: 1" and 1-1/4"

Dimensions

Code A B C D E F

280165A 1" N P T 3

⁄2" 7" 6" 1

⁄8" 4

⁄8"

280965A 1" S W T 3

⁄2" 7" 6" 1

⁄8" 4

⁄8"

280175A 1

⁄4" NPT 3

⁄16" 7

⁄8" 6

⁄16" 1

⁄16" 4

⁄8"

280975A 1

⁄4" SWT 3

⁄16" 7

⁄8" 6

⁄16" 1

⁄16" 4

⁄8"

Replaces 01223/13 NA

Summary of content (4 pages)

PAGE 1
ThermoProtec boiler protection high-flow thermostatic mixing valve ™ CALEFFI 280 series 01223/17 NA ACCREDITED ISO 9001 FM 21654 Replaces 01223/13 NA ISO 9001 No. 0003 Function The ThermoProtec™ boiler protection high-flow thermostatic mixing valve is used in hydronic heating systems with non-condensing boilers, including solid fuel, biomass, gas, LP or oil-fired.
PAGE 2
Wood biomass and condensation build-up Operating principle Wood contains a variable moisture content depending on the type (logs, pellets, woodchips, etc.). Water vapor is released during the solid fuel drying phase inside the combustion chamber. The presence of cold surfacesCONDENSING in NONthe boiler or flue gas chimney can lower the temperature of the flue gasBOILER down to the dew point, causing condensation.
PAGE 3
Construction details Sizing method/set point selection Brass body The brass body prevents the formation of ferrous residues in the system, prolonging boiler operating life. Knowing the BTU output and thermal head on the boiler, the boiler flow rate can be calculated. Use the hydraulic characteristics graph to identify the pressure drop of the valve. The valve size can then be selected from the pressure drop value with the available head of the system pump.
PAGE 4
System with buffer tank storage Use safety devices according to local regulations M M M M M M NONCONDENSING BOILER NONCONDENSING BOILER * *Air purge recommended for boiler loop Non-condensing boiler, connection to buffer tank storage in parallel Use safety devices according to local regulations SOLID FUEL BOILER NONCONDENSING BOILER * *Air purge recommended for boiler loop SPECIFICATION SUMMARIES ThermoProtec 280 series Boiler protection thermostatic mixing valve.