T2000 Series
Thera-4 Design
RADIATOR THERMOSTATS IN COMPACT SIZE
PRODUCT DATA
Application
Thermostats are installed onto thermostatic valve bodies
(TRV bodies). The combination of thermostat and TRV body,
(TRV), controls the room temperature by regulating the flow
of heating water into a heat exchanger.
TRVs are installed in water-based heating systems at the
supply or, less commonly at the return connection of radiators
or other heat exchangers.
Thera-4 Design type thermostats conform to the European
Standard EN215 when used with Honeywell TRV bodies
according to table 2 on page 3.
Thera-4 Design with M30 x 1,5 connection are suitable for
all Honeywell TRV bodies and radiator inserts as well as
other TRV bodies and radiator inserts with M30 x 1,5 connection and 11,5 mm closing dimension.
Thera-4 Design-DA with Danfoss snap connection are
suitable for TRV bodies and valve inserts with a Danfoss RA
type compatible snap connection.
Design
The radiator thermostat consists of:
• Handwheel with lid and socket
• Sensor with support cage
• Spindle assembly
• Connection nut
Materials
• Handwheel, lid and socket made of plastic, white to
RAL9016
• Support cage and spindle construction made of plastic
• Sensor filled with liquid
• Connection nut made of brass, nickel-plated – for M30x1,5
connection
• Connection nut made of plastic, white to RAL 9016 – for
DA version
Features
• Thera-4 Design with M30 x 1.5 connection conforms to
European standard EN215
• With liquid sensing element
• Modern design
• Compact size
• Easy to clean
• Easy to use range stops
Specifications
Thermostat connection
Setpoint range
Temperature range
Closing dimension
NOTE: Zero-position is also thermostatically controlled –
when temperature falls the TRV may open.
• M30 x 1,5
• Danfoss snap connection
• 0 - 7 - 1..5 (with zero-position)
• 7 - 1..5 (without zero-position)
With zero-position (‘0’):
1...28°C (34...82°F)
Without zero-position:
6...28°C (43...82°F)
11,5 mm (Thera-4 Design)
THERA-4 DESIGN (T2000 SERIES)
Dimensions
Fig. 1. Thera-4 Design with internal sensor
Table 1. Dimensions
Item H closed H open Ø
Fig. 1 and Fig. 2 73 79 49
All dimensions in mm if not stated differently.
Accessories
Theft-protection ring, white
TA6900A001
Screwdriver for theft-protection ring
TA6900B001
Range stops, 10 blue and 10 red
TA3000C001
Range stops, 20 white
TA3000C002
Range stops, 20 chrome
TA3000C003
Cover ring, white
For M30x1,5 connection only TA1000A001
2 www.honeywell.com Honeywell GmbH • All rights reserved
THERA-4 DESIGN (T2000 SERIES)
Ordering Information
Item Zero-
position (‘0’)
Thera-4 Design, Thera-4 Design-DA with internal sensor
Liquid-filled sensing element M30 x 1,5 white / white Honeywell T2001
• M30 x 1,5 white / white Honeywell T2001W0
• DA snap connection white / white Honeywell T2001DAW0
• M30 x 1,5 white / chrome Honeywell T2021W0
• DA snap connection white / chrome Honeywell T2021DAW0
• M30 x 1,5 chrome / chrome Honeywell T2221W0
• DA snap connection chrome / chrome Honeywell T2221DAW0
Connection Colour Cap OS-No.
DA snap connection white / white Honeywell T2001DA
M30 x 1,5 white / chrome Honeywell T2021
DA snap connection white / chrome Honeywell T2021DA
M30 x 1,5 chrome / chrome Honeywell T2221
DA snap connection chrome / chrome Honeywell T2221DA
EN215 Information
OS-Nos. T2001, T2001W0, T2021,T2021WO, T2221 and T2221WO type Thera-4 Design thermostats in connection with below
TRV bodies (marked ●) conform to the European Standard EN215. The
one certain valve type.
Thera-4 Design EN 215 requirements
Min. setpoint temperature 6°C (43°F) 5...12°C (41...54°F)
Max. setpoint temperature 28°C (82°F) ≤ 32°C (90°F)
Hysteresis ≤ 0,3K ≤ 1,0K
Influence of differential pressure 0,1...0,5K ≤ 1,0K
Influence of static pressure 0,4K ≤ 1,0K
Influence of heating medium 1K ≤ 1,5K
Response time 30 min. ≤ 40 min.
highlighted boxes identify available body patterns of
NOTE: Influence of differential pressure depends on used TRV body.
Table 2. Comparison of Thera-4 Design specs and EN 215 requirements
Angle to
DIN
Straight to
DIN
Angle to
NF
Valve type
BB
KV3
KV4
KV5
UBG
GB
SL
V
FV
SC
H
Straight toNFCompact
• • • • • •
• • • •
• • • •
• • • •
• • • • • •
• • • • • •
Table 3. EN 215 cross reference
angle
Compact
straight
Horizontal
angle
Corner
angle
Swanneck
Other
•
Angle (re-
turn)
Straight
(return)
Honeywell GmbH • All rights reserved www.honeywell.com 3
THERA-4 DESIGN (T2000 SERIES)
A
Setpoint
Thera-4 Design type thermostats with zero-position (‘0’)
Setpoint 0
°C
°F
Thera-4 Design type thermostats without zero-position (‘0’)
Setpoint
°C
°F
7
12345
1 6 14 18 21 24 28
34 43 57 64 70 75 82
7
12345
6 1418212428
43 57 64 70 75 82
Installation Examples
NOTE: All °C and °F-values approximate.
NOTE: Heating can freeze when thermostats with zero-
position are set at position ‘0’.
NOTE: Zero-position is also thermostatically controlled –
when temperature falls the TRV may open.
Fig. 3. Installation of Thera-4 Design with internal sensor
utomation & Control Solutions
Honeywell GmbH
Möhnestraße 55
Phone: (49) 2932 9880
Fax: (49) 2932 988239
D-59755 Arnsberg-Neheim
www.honeywell.com
EN0H-0284GE25 R0105
Subject to change without notice
© 2005 Honeywell GmbH
Loading...