VT15
London Office
Honeywell Control Systems Ltd.
Honeywell House
Arlington Business Park
Bracknell, Berkshire RG12 1EB
T (0 13 44) 65 60 00
F (0 13 44) 65 62 40
www.honeywell.com/uk
EN2H-2123GE23 R1108
November 2008
© 2008 Honeywell International Inc.
Subject to change without notice
Manufactured for and on behalf of the Environmental and Combu-
stion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A.
La Pièce 16, Switzerland or its authorized representative.
8. Temperature Scale
The VT15 is adjusted by turning the top anticlockwise to increase the
temperature setting or clockwise to decrease the temperature setting.
These temperatures are for guidance only and may vary slightly depen-
ding on the nature of the installation.
9. Using the “Memory Clip“
1. Remove “Memory Clip” and fit
into required setting Position
10. Temperature limiting
To set the upper limit:
1. Set to the required value and insert the right
hand stop bar with the “Memory Clip”
To set the lower limit:
1. Set to the required value and insert the left
hand stop bar with the “Memory Clip”
11. Temperature locking
1. Set to the required value and insert the
right and left hand stop bars with the
“Memory Clip”
12. Removal of temperature
limits and locking
1. Remove stop bars with the
“Memory Clip“
13. Fitting Valve Connections
Copper Connections
1. Cut copper tube to an entry depth
of 8mm
Radiator Connections
1. Screw 1/2’’ BSP tailpiece into the
tapping on radiator.
14. Specification
15. Servicing
Use the service tool VA8200A001 for
cleaning or replacement of the valve
seating without draining the system.
For further informations see seperate
manual.
16. Radiator Removal
If it is necessary to remove the radiator for decorating or other reasons,
ensure that the thermostatic head is positioned at the `0´ position.
However, if the temperature in the room falls below 6°C, the thermostat
will open.
If there is any possibility that the temperature in the room will fall below
6°C, then the decorators cap supplied with the valve should be used to
isolate the flow.
17. Check list
• Check all connections for securing and leaks.
• Use clean pipework, free from swarf.
• Consider the use of an automatic by-pass valve
(e.g. Honeywell DU145) to ensure the specification is adherded to.
• Don’t allow heat from blow torch onto body.
• Don’t install the valve in a position which is subject to draughts, sun
radiation or behind curtains.
• Don’t overtighten the head/body connection, as the insulating sleeve
may become damaged.
NOTE:
Ensure that the foam insert located in the thermostatic head
is in place in the head before the head is attached to the
valve body.
6°C
10°C
15°C
20°C
23°C
26°C
0
*
1
2
3
4
5
Thermo-
static off
Frost
Position
Normal
Setting
3
5
3
5
3
5
3
5
3
5
3
5
8mm
8mm
OR
Maximum flow temperature
130°C (266°F)
Maximum working pressure
10 Bar (150psi)
To ensure that the valve will thermostatically close the differential pres-
sure must not exceed 1.0 bar.
Maximum differential pressure to ensure reliable and quiet operation is
0.2 bar.
Hystersis
<1.0k
Heat conduction
0.6k
Change in differential pressure
0.4k
Closing time
20 mins
CEN Approved
EN215
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