Honeywell T6951, T6950, T6960, T6961 SPECIFICATION DATA & MOUNTING INSTRUCTIONS
T6950/T6951/T6960/T6961
SINGLE-STAGE FROST PROTECTION THERMOSTATS
SPECIFICATION DATA & MOUNTING INSTRUCTIONS
FEATURES
• Gas-filled copper sensor element with 1.8 m bulb
length or 3 m / 6 m coil length
• Dust-tight (Honeywell) micro switch with switching
contacts (heat/cool)
• Protection class I (T6950/51) according to EN60335-1,
IP54 according to EN60529
• Easy installation and wiring
• Manual reset (T6950/60), automatic reset (T6951/61)
• °C and °F scale
• Fast mounting and installation
GENERAL
These Single-Stage Thermostats feature an antifreeze
function and are designed for systems in which the temperature must not drop below a certain fixed safety value
such as:
• Reheaters in air conditioning systems
• Heat exchanger in cooling systems
Models
order number
T6950A1000 1.8
T6950A1018 3.0
T6950A1026
T6951A1009 1.8
T6951A1017 3.0
T6951A1025
T6960A1008 1.8
T6960A1016 3.0
T6960A1024
T6961A1007 1.8
T6961A1015 3.0
T6961A1023
protection
standard
IP54
IP54
IP65
IP65
bulb length
(in m)
6.0
6.0
6.0
6.0
reset
manual
automatic
manual
automatic
SPECIFICATION
Switching capacity 24...250 Vac; 15(8) A
Humidity 0...95% rh, non-condensing
Adjustable temp. range -10...+12 °C (+14...+54 °F)
Storage temperature -30...+90 °C
Operating temperature -20...+80 °C
Max. overload temperature 150 °C (1h max.)
Hysteresis 1 K (typical)
Wiring terminals Screw terminal block for wires up
to 1.5 mm²
Cable entry M20x1.5, for ∅ 6...13 mm
Housing material polycarbonate and polyamide
Weights approx. 450 g
Dimensions 130 x 130 x 70 mm
® U.S. Registered Trademark EN0B-0288GE51 R0208
Copyright © 2008 Honeywell Inc. • All rights reserved
T6950/T6951/T6960/T6961 SINGLE-STAGE FROST PROTECTION THERMOSTATS
120
MOUNTING AND SETTING
The switching temperature can be set by an adjustment
screw on top of the housing. The room temperature at the
thermostat body should not drop below the setting point.
Recommended mounting position is vertical with cable entry
on bottom side. For mounting, use the screws (included in the
package) and mount the device without opening the housing.
For wiring, remove the cover and proceed as shown in Fig. 2.
During the unwinding operation, the capillary tube must be
held by the anti-kink device on the diaphragm pot. Maintain a
radius of curvature of at least 20 mm.
To ensure reliable switching, the capillary tubes (3 m and
6 m) must be cooled along a length of at least 40 cm.
DIMENSIONS
130
70
60
130
Fig. 1. Dimensions in mm
WARNING
All operations performed on the unit, whether wiring,
testing, or maintenance, must be done without power
supply on the unit and external loads. Such
operations are permitted only by skilled workers.
Honeywell is not liable for possible damages caused
by an inadequate installation and/or by removed or
exchanged security devices.
To guarantee the sealed protection on the unit, turn
the cover screws and close the grommet.
WIRING
Field Wiring
red (common)
blue (normally closed)
white (normally open)
earthing terminal
Fig. 2. Field wiring
Heating: Connect red to blue; the contact will open when the
temperature rises.
Cooling: Connect red to white; the contact will open when
the temperature drops.
Signal function: For service functions, connect a signal lamp
to the corresponding opposite contact. The free contact will
then close simultaneously (thus acting as a signal contact).
Reset Function
T6950A/T6960A are manual reset types. The switching
contact is moved back by pressing a button on the front side
(service personal, only).
T6951A/T6961A are automatic reset types. The switching
contact moves back to its normal position if the temperature
moves to normal range.
ACCESSORIES
Included in package: 6 pcs fastening clamps for 3 m and 6 m
bulb length, 3 pcs for 1.8 m bulb length.
50
50
Fig. 3. Fastening clamp, dimensions in mm
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:
Fema Control
Honeywell GmbH
Böblinger Straβe 17
D-71101 Schönaich
Phone: (49) 7031 63702
Fax: (49) 7031 637850
http://www.fema.biz
Subject to change without notice. Printed in Germany
EN0B-0288GE51 R0208
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