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NOTICE
!
Risk of damage to the restriction stem
through one-side loading (DN 15 to 25)
while turning the set point screw (8.3)
clockwise.
First turn the handwheel of the electric actua-
tor to completely close the restriction.
6.2 Adjusting the control
thermostat
Turn the black plastic adjuster (22) to adjust
the temperature set point while watching the
reference thermometer.
Turn clockwise: ():
− The temperature (set point) is reduced.
Turn counterclockwise ():
− The temperature (set point) is raised.
The adjusted set point can be lead-sealed at
the hole (8.4).
NOTICE
!
The Type 2430 Control Thermostat is started
up and operated as described in the associ-
ated documentation (Referenced documenta-
tion on page 8).
EB 3135-2 EN
NOTICE
!
Risk of regulator damage due to exces-
sively high or low tightening torques.
Observe the specified torques when tighten-
ing regulator components. Excessive tighten-
ing torques lead to parts wearing out more
quickly. Parts that are too loose may cause
leakage.
Observe the tightening torques specified in
section 9.2.
6.3 Adjustment without electric
actuator
1. DN 15 to 25:
Turn the manual adjuster (30) clockwise
() as far as it will go to close the re-
striction.
Use a suitable tool (Allen key, SW 4) to
turn the set point screw (8.3) clockwise
() as far as it will go.
DN 32 to 50:
To close the restriction, loosen the fixing
screw (8.7) and turn the set point adjust-
er (8.2) clockwise () as far as it will go.
2. Refer to Fig. 7 to find out how many
turns or which valve travel is required to
set the required flow rate. For valve size
DN 15, the adjustment curve that corre-
sponds with the flow coefficient K
cated on the nameplate must be selected.
3. Turn the set point screw (8.3) or set point
adjuster (8.2) by the required number of
turns. Turn it counterclockwise () to
open the restriction. The flow rate rises.
Operation
indi-
VS
29
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