Samson 3301 Service manual

Mounting and
Operating Instructions
EB 7065 EN
Edition January 2014
Pneumatic Controller for Temperature
Type301-1
Pneumatic Controller for Temperature
Type 3301

2 EB 7065 EN
Denition of the signal words used in these mounting and operating instructions
Note:
Supplementary explanations, informa-
tion and tips


EB 7065 EN 3
Contents
1 General safety instructions.............................................................................4
2 Process medium and scope of application.......................................................5
2.1 Transportation and storage .............................................................................5
2.2 Versions ........................................................................................................5
3 Design and principle of operation ..................................................................6
3.1 Operating and indicating elements..................................................................7
3.2 Pneumatic connections....................................................................................7
4 Installation....................................................................................................8
4.1 Mounting position..........................................................................................8
5 Operation...................................................................................................10
5.1 Adjusting the operating direction ..................................................................10
5.2 Set point adjustment.....................................................................................10
5.3 Adjusting the proportional band ...................................................................10
5.4 Zero adjustment...........................................................................................11
6 Maintenance ...............................................................................................11
7 Nameplate..................................................................................................11
8 Technical data .............................................................................................12
9 Dimensions .................................................................................................12
10 Customer service.........................................................................................13
Contents Page

General safety instructions
4 EB 7065 EN
1 General safety instructions
−The device must be mounted, started up or serviced by fully trained and
qualied personnel only; the accepted industry codes and practices are to
be observed. Make sure employees or third persons are not exposed to any
danger.
−According to these mounting and operating instructions, trained person-
nel refers to individuals who are able to judge the work they are assigned
to and recognize possible dangers due to their specialized training, their
knowledge and experience as well as their knowledge of the applicable
standards.
−To ensure appropriate use, only use the device in applications where the op-
erating pressure and temperatures do not exceed the specications used for
sizing the regulator at the ordering stage.
−The manufacturer does not assume any responsibility for damage caused by
external forces or any other external factors.
−Any hazards that could be caused in the controller by the process medium,
operating pressure or by moving parts are to be prevented by taking appro-
priate precautions.
−Proper transport, storage, installation, operation and maintenance are as-
sumed.
−SAMSON does not assume any liability for damage caused when the device
is not used as intended.

Process medium and scope of application
EB 7065 EN 5
2 Process medium and scope of application
Pneumatic controller functioning as a proportional controller to control the temperature of gases
and vapors at the point of measurement with a pneumatic control valve.
Medium temperatures from 0 to 300 °C
The controller compares the temperature measured by the xed expansion bulb sensor with the
adjusted set point and issues a pneumatic signal between 0.2 to 1bar at the output. This signal
pressure acts on the connected pneumatic control valve. The controller requires a supply pres-
sure of 1.4bar. The measured temperature is indicated at the controller.
2.1 Transportation and storage
Transportation and storage in the permissible temperature range from –10 to +90°C. Protect
the controller against adverse inuences, such as dirt or moisture during storage.
2.2 Versions
Two versions of the Type3301 Controller are available that have different set point ranges.
Table 1: Type3301∙Versions
Type Set point range Conguration ID
(Var.-ID)
3301-9001 0 to 200°C Var.-ID 1063422
3301-9002 100 to 300°C Var.-ID 1294879
The mounting parts are not included in the scope of delivery. They must be ordered separately
(see section 4 on page 8, Fig. 4 and Fig. 5).

Design and principle of operation
6 EB 7065 EN
3 Design and principle of op-
eration
The controller mainly consists of the controller
housing containing a nozzle and apper sys-
tem, pressure gauges for supply air and out-
put pressure as well as the temperature sensor
with an outer tube (11) and Invar rod (12).
The different expansion properties of the In-
var rod and tube materials produce a de-
ection each time the temperature at the sen-
sor changes. This deection causes the differ-
ential plate (3) mounted on the plate spring
(9) to tilt on the ball (5), and causes the dis-
tance between the nozzle (2) and apper (4)
to change. The supply air pZ (1.4± 0.1bar)
ows through the restriction (1) to the nozzle
(2). These two components act as a pressure
divider controlled by the apper. As a result,
the output pressure p
A
(controlled variable 0.2
to 1bar) is regulated proportional to the sys-
tem deviation and in relation to the xed op-
erating point of 0.6bar.
The set point is adjusted at the screw (8) con-
nected to the set point pointer (7). The pro-
portional band is adjusted at the adjustment
screw (6). The position of the red dot on the
screw (6) indicates the operating direction ad-
justed.
Position in scale range
^
^
: The output pres-
sure pA increases as the controlled variable
increases.
Position in scale range
^
^
: The output pres-
sure pA decreases as the controlled variable
increases.
Fig. 1: Functional diagram of Type3301
1 Restriction
2 Nozzle
3 Differential plate
4 Flapper
5 Ball
6 Adjustment screw for Xp
(proportional band)
7 Set point pointer
8 Screw for set point adjustment
9 Plate spring
10 Base plate
11 Outer tube
12 Invar rod
pZSupply air (1.4± 0.1bar)
pAOutput pressure (0.2 to 1bar)
pZ pA

Design and principle of operation
EB 7065 EN 7
3.1 Operating and indicating elements
Fig. 2: View from the front
3.2 Pneumatic connections
The connections for supply air p
Z
and output pressure p
A
are located underneath the control-
ler. They are designed as
1
/
8
NPT tapped holes.
Various screw ttings to connect pipes and plastic hoses are available.
Fig. 3: Pneumatic connections underneath the controller
Adjustment screw
for Xp and oper-
ating direction
Pressure gauge for
supply air pZ
Pressure gauge for
output pressure pA
Screw for set
point adjustment
Set point pointer
Connection for
supply air pZ
Connection for
output pressure pA
Output
Supply air

Installation
8 EB 7065 EN
Screw gland (PN10)
Suitable for pipes and pressure vessels up to
max. 10bar. Seal the screw tting. Push in the
sensor with screw gland and coupling nut. Tight-
en the coupling nut.
*) G ½: Order no.: 1080-4881
G ¾: Order no.: 1080-4882
Screw gland with clamping nut (PN 40)
For use with pressure up to max. 40bar.
Tighten the clamping nut (instead of the cou-
pling nut).
*) G ½: Order no.: 1080-4884
G ¾: Order no.: 1080-4885
Thermowell with thread (PN63) for pressures up to 63bar
A thermowell must be used in place of the screw
gland if the pressure at the sensor is greater than
the nominal pressure, if the medium to be con-
trolled is corrosive or the controlled system is to
continue to operate while the controller is being
replaced. Screw the thermowell into the sleeve.
Push the temperature sensor into the thermowell
and fasten with the coupling nut.
*) G ½: Order no.: 1080-4888
G ¾: Order no.: 1080-4889
Fig. 4: Mounting parts for sensor · Screw glands and thermowell
4 Installation
The controller may be installed in any posi-
tion. Make sure that the effective length of the
sensor (330mm) is completely surrounded by
the medium.
Install a reference thermometer close to the
controller to monitor the temperature (and to
check zero).
4.1 Mounting position
To install the controller, a coupling sleeve with
G½ or G¾ female thread must be present at
the point of measurement. Screw or seal one
of the mounting parts shown in Fig.4 and 5
into this sleeve.
The mounting parts are not included in the
scope of delivery. They must be ordered sep-
arately. Select accessories required for the op-
erating conditions at the site of installation.

Installation
EB 7065 EN 9
Thermowell for welding (PN 63) for pressures up to 63 bar
Order no.: 1080-4890
Thermowell with ange DN 25 for PN 40 or PN 100
Order no.: 1080-4891 (PN40)
Order no.: 1080-4892 (PN100)
Clamping ange
For wall mounting, e.g. on pressureless vessels
in air-conditioning and ventilation plants.
Screw the ange to the wall using the two
screws. Attach the temperature sensor in the
ange using two other screws.
Order no.: 1090-9547 (PN40)
Order no.: 1080-4892 (PN100)
Fig. 5: Mounting parts for sensor · Thermowells and clamping ange
SW 32
373
Ø 22.3
335 40
Ø 21.3
SW 32
32
8 Ø50
55 75
Ø12
Ø26
Ø9.5

Operation
10 EB 7065 EN
2. Turn the adjustment screw (8) until the set
point pointer (7) points to the required
temperature on the scale.
Adjustment screw (8)
Note:
Do not turn the pointer past the adjust-
ment range of the scale.
5.3 Adjusting the proportional
band
The continuously variable adjustment of the
gain is performed at the adjustment screw (6).
Gain
High
Low
Make sure that the adjustment is only per-
formed within the operating direction deter-
mined in section 5.1, i.e. either on the left or
right side of the scale.
The gain can be adjusted continuously in the
direction of the arrow between 2 and 20%.
The red dot on the adjustment screw (6) serves
as the orientation mark.

5 Operation
See Fig. 1 on page 6.
5.1 Adjusting the operating
direction
Adjust the operating direction before start-up
as follows:
1. Undo the screw on the cover and swivel
the guard plate out of the way.
Screw with guard plate
2. Use a screwdriver to adjust the adjustment
screw (6) counterclockwise () or clock-
wise () to make the red dot on the screw
point to the required operating direction
on the scale.
Adjustment screw (6)
−Increasing/increasing
^
^
:
The output pressure pA increases as the
temperature at the sensor increases.
−Increasing/decreasing
^
^
:
The output pressure pA decreases as the
temperature at the sensor increases.
5.2 Set point adjustment
1. Undo the screw on the cover and swivel
the guard plate out of the way.