Samson 2489/58 Series, Монтаж и эксплуатация, Страница: 29 / 44

EB 3135-2 EN 29
Operation
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).
The Type 2430 Control Thermostat is started
up and operated as described in the associ-
ated documentation (Referenced documenta -
tion on page 8).
NOTICE !
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
VS
indi-
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.
NOTICE !