Honeywell TM200 Product specification sheet

EN0H-1306GE23 R0807 • Subject to change

TM200

Thermostatic mixing valve with scald protection

Product specification sheet

Application

Construction

The thermostatic mixing valve comprises:

•Housing

•Threaded or soldered union connectors

•Adjuster knob

•Protective cap for locking the set mixed temperature

•Thermostat

Materials

•Dezincification resistant brass housing

•Brass threaded connections

•Moving parts of high-quality, scale-resistant synthetic material

•Transparent plastics protective cap

•Plastics adjuster knob

•NBR seals

•Stainless steel spring

Thermostatic mixing valves of this type provide control of the water temperature and are used:

•For centralised control on hot water supply units or for localised control adjacent to point-use outlets

•In heating systems with underfloor heating or for limiting boiler return temperatures

Where a system includes a hot water circulation circuit, a KB 191 return flow retarder unit (see accessories) must be fitted to prevent cold water backfeeding and cooling the mixed water at the outlets.

Special Features

•Highly sensitive thermal element with good all-round watertemperature sensing, even at low flow rates

•Simple setting of the required water temperature

•Scald protection - the hot water inlet is automatically cut off if the cold supply fails provided that the hot water inlet temperature is at least 10 K higher than that of mixed water setting

•The cold water inlet is automatically cut off if the hot supply fails

•Meets KTW recommendations for potable water

•Inner components are of scale-resistant materials

Range of Application
Medium	Water
Operating pressure	Max. 10 bar
Maximum pressure diffe- 2.5 bar
rence between hot and
cold inlet supplies
Technical Data
Installation position	As required
Hot water inlet tempera-	Max. 90 °C
ture
Connection size	R 3/4" or 22
Setting range	30 °C - 60 °C
	Set during manufacture 40 °C
Flow rate at 1.0 bar pres-27 l/min
sure differential across
valve approximately
Control accuracy	< ± 4 K

www.honeywell.com 31

TM200 Thermostatic mixing valve

Connection size	R	3/4"	22 mm
Dimensions	(mm)
	L	134	122
	l	67	61
	H	128	122

Method of Operation

a) As a mixing valve for hot water supply systems and heating systems:

The highly sensitive thermal element located in the outlet of the valve controls a plug which regulates the flow proportions of cold and hot water in relation to the mixed hot water setting selected. Soft seatings are fitted to both hot and cold water inlets.

They provide:

•A positive hot inlet shutoff if the cold water supply is interrupted, provided that the hot water inlet temperature is at least 10 K higher than that of the mixed water setting.

•The cold water supply is cut off if the hot water supply is interrupted.

b) As a diverter valve on central heating systems:

For this application flow through the valve is in the reverse direction compared with its use as a hot water mixing valve. The inlet water passes around the sensing element and regulates the control piston so that for temperatures above the set value the water is returned to the heating circuit and for temperatures lower than the set value the water is diverted to the boiler.

A protective cap is supplied with the valve to lock the mixed temperature setting.

Options

TM200-3/4A = With R 3/4" threaded male connections TM200-3/4B = With 22 mm soldered connections

KB191

Accessories

KB191-3/4 Return flow-retarder unit

for fitting to systems which include a hot water circulation circuit - to prevent cold water backfeeding and cooling the mixed water at the outlets.

Operating pressure:max. 10 bar Operating temperature:max. 90 °C

Installation orientation:Arrow pointing in flow direction

EN0H-1306GE23 R0807 • Subject to change

32 www.honeywell.com