TC · Edition 08.17 39
Project planning information
5.2 Start rate
The tightness control TC requires a minimum start rate
in order to carry out tightness tests on slow opening
valves:
up to 5 l (1.3 gal) test volume V
P
=
5% of maximum flow rate Q
max.
,
up to 12 l (3.12 gal) test volume V
P
=
10% of maximum flow rate Q
max.
.
5.3 Installation
Installation of TC 1, TC 2, TC 3 in the vertical or hori-
zontal position, housing cover/indicators must not
point upwards or downwards. The electrical connection
should preferably be pointing downwards or towards
the outlet.
TC 4 installation position: any.
Avoid condensation in the system.
Do not store or install the unit in the open air.
The tightness control TC must not be in contact with
masonry, minimum distance 20 mm (0.78 inches).
5.3.1 TC 1V for solenoid valves for gas VAS, VCx
The valve actuator cannot be rotated on gas solenoid
valves with a proof of closure switch VCx..S or VCx..G.
When using a valve/pressure regulator combination
VCG/VCV/VCH, the pressure regulator must be acti-
vated with air during the entire test period t
P
. This en-
sures that the space between the valves can be filled
and vented.
A TC and a bypass/pilot gas valve cannot be fitted to-
gether on the same attachment side of the VAS or VCx.
5.3.2 TC 1C for combination controls CG
An adapter plate is supplied for mounting the TC 1C to a
combination control CG. The connections for p
u
and p
z
are marked on the adapter plate.
p
u
p
z
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