Fisher 2506 User manual

D200129X012
250 6 S eries Multi-Trol R eceiver/Controllers
(Type
s 2 506 , 2 516 , 2 516F)
Contents
Introduction 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting the Controller 2 . . . . . . . . . . . . . . . . .
Actuator Yoke Mounting 4. . . . . . . . . . . . . . . . . . . . . .
Wall Mounting 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Diaphragm Case Mounting 5. . . . . . . . . . . .
Pipestand Mounting 6. . . . . . . . . . . . . . . . . . . . . . . . . .
2500 Series Controller/Transmitter and
2506 Series Receiver/Controller Mounting 6. . . .
Connections 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Connection 7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Connections 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Connection 8. . . . . . . . . . . . . . . . . . . . . . . .
Vents 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Set Point Connection 9. . . . . . . . . . . . . . . . .
Startup 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Point Adjustment 10. . . . . . . . . . . . . . . . . . . . . . .
Remote Set Point Adjustment 10. . . . . . . . . . . . . . .
Proportional Band Adjustment 11. . . . . . . . . . . . . . .
Reset Adjustment
(Type 2516 Receiver/Controller Only) 11. . . . . .
Anti-Reset Windup Valve Adjustment
(Type 2516F Receiver/Controller Only) 11. . . . .
Calibration 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 12 . . . . . . . . . . . . . . . . . .
Type 2506 Receiver/Controllers 12. . . . . . . . . . . . . .
Types 2516, 2516F Receiver/Controllers 13. . . . . .
Figure 1. T ype 2506 Multi-T rol

Receiver-Controller
W4687 / IL
Figure2. T ype 2516 Multi-T rol

Receiver-Controller
W4688 / IL
Instruction Manual
Form 1041
September 1993 Types 2506, 2516, 2516F

Types 2506, 2516, 2516F
2
Contents (Continued)
Maintenance 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing Controller Action 14. . . . . . . . . . . . . . . . . .
Troubleshooting 15 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Relay Deadband 15. . . . . . . . . . . . . . . . . . . .
Replacing Receiver/Controller Parts 16. . . . . . . . . .
Bellows Replacement 16. . . . . . . . . . . . . . . . . . . . .
Changing the Relay 16. . . . . . . . . . . . . . . . . . . . . . .
Relay Assembly Maintenance 16. . . . . . . . . . . . . .
Changing Proportional or Reset Valve 17. . . . . . .
Parts Ordering 17. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver/Controller Common Parts 18. . . . . . . . . . .
Relay Assembly 20. . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Reset Windup Valve for Type 2516F Only 22.
Type 2516F Reset and Anti-Reset Windup
Valve Assembly 22. . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Parts 22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Yoke Mounting 22. . . . . . . . . . . . . . . . . . . . . . . . . . .
Wall Mounting 22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case Mounting 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipestand Mounting 23. . . . . . . . . . . . . . . . . . . . . . .
2500 Series Controller/Transmitter and
2506 Series Receiver/Controller Mounting 23.
Introduction
Scope of Manual
This manual provides installation, startup, calibration,
maintenance, and parts ordering information for Fisher
Controls 2506 Series Multi-Trol receiver/controllers.
Figure 1 shows a Type 2506 receiver/controller. Figure
2 shows a Type 2516 receiver/controller.
A 2506 Series receiver/controller is often used with a
Fisher Controls 2502 Series Level-Trolcontroller/
transmitter. For more information about 2502 Series
controller/transmitters or associated equipment such
as pressure regulators, sensors, accessories, or re-
lated control devices, see the appropriate instruction
manual. Contact your Fisher Controls sales office or
representative for applications assistance.
Only personnel qualified through training or experience
should install, operate, or maintain these receiver/con-
trollers and associated equipment. If you have any
questions concerning the instructions in this manual,
contact your Fisher sales office or sales representative
before proceeding.
Description
See table 2.
The receiver/controllers described in this manual pro-
vide:
DProportional-only control: Type 2506 (with snap
action: Type 2506S)
DProportional-plus-reset control (Type 2516)
DProportional-plus-reset-plus-anti-reset windup
control (Type 2516F)
See figures 9, 10, 11.
The receiver/controller takes a pneumatic input signal
from either a 2500 Series controller/transmitter or a
control device. The unit then provides a pneumatic
output signal that operates a final control element.
When a Type 2506 receiver/controller is used to pro-
vide proportional-only control, the pneumatic output
signal from the unit can also be piped to a remote re-
ceiving indicator or recording device. This provides a
visual indication of receiver/controller action.
The INCREASE OUTPUT PRESSURE adjustment is
used to increase or decrease the output pressure in
relationship to the input pressure. Changing this ad-
justment changes the position of the nozzle in relation-
ship to the beam/flapper assembly. In turn, the amount
of supply pressure released by the relay is changed
and the pneumatic output signal that operates a final
control element is affected.
If a remote set point signal is used, it is piped to the
remote set point connection and into remote set point
bellows. The remote signal expands the bellows and
moves the beam/flapper assembly. This affects the
controller output in the same way a change in the IN-
CREASE OUTPUT PRESSURE adjustment affects
the output.
Specifications
Specifications are shown in table 1.
Mounting the Controller
Note
Mounting Parts May Be Required
If a separate receiver/controller unit has
been ordered for field installation with
an existing valve/actuator assembly or
2500 Series controller/transmitter, addi-
tional mounting parts may be required.
In the parts list at the end of this manu-
al, find the mounting description. Then,
order any additional parts.

Types 2506, 2516, 2516F
3
Table1. Specifications
Available Configurations
For additional information, refer to table 2
Type 2506: A receiver/controller(1) that is set for
either proportional or snap action (S) control or for
either direct or reverse (R) action
Type 2516: A Type 2506 that also provides propor-
tional-plus-reset control
Type 2516F: A Type 2516 that also provides anti-
reset windup control
Input Signal Range(2)
From a transmitter or control device, a signal of 3 to
15 psig (0.2 to 1.0 bar) or 6 to 30 psig (0.4 to 2.0
bar) is required depending on receiver/controller
range. Refer to receiver/controller nameplate for
specific range
Output Signal Range(2,3)
See table 3
Output Action
Direct Action: An increasing fluid, interface level,
or density increases output pressure or,
Reverse Action: An increasing fluid, interface lev-
el, or density decreases output pressure
Remote Set Point Signal Range
From a control device, provide a remote set point
signal that is 3 to 15 psig (0.2 to 1.0 bar) or 6 to 30
psig (0.4 to 2.0 bar) that matches the receiver/con-
troller input signal range.
Supply Pressure(2)
Normal Operating Pressure: See table 3
Maximum Pressure to Prevent Internal Part
Rupture: 50 psig (3.4 bar)
Steady State Air Consumption(3)
See table 3
Proportional Band(2) Reset(2), and Anti-Reset
Windup
See table 2 and the Changing Controller Action pro-
cedure
Performance
Hysteresis: 0.6 percent of output pressure change
at 100 percent of proportional band for Type 2506
proportional receiver/controllers only
Standard Supply and Output Pressure Gauge Indi-
cations
See table 3
Standard Tubing Connections
All connections are 1/4-inch NPT female
Operative Ambient Temperature Limits
Standard: –40 to 160°F (–40 to 71°C)
High Temperature: 0 to 220°F (–18 to 104°C)
Approximate Weight
10 Pounds (4.54 kg)
1. Receiver/controllers are field adjustable between direct or reverse action. If the receiver/controller is set for reverse action at the factory, an R suffix will appear in the type number.
Receiver/controllers are field-adjustable between proportional and snap action.If the receiver/controller is set for snap action at the factory, an S suffix appears in the type number.
2. These terms are defined in ISA Standard S51.1-1979.
3. Scfh at 60°F, 14.7 psia (m3/hr at 0°C, 1.01325 bar absolute).
Table 2. Additional Information
Control Mode(1) Action (Full Output Change) Output Signal
Proportional control
(Type 2506) Proportional Band: Adjustable from 0 to 100% of transmitter signal.
3 to 15 psig
(0.2 to 1.0 bar) or
6 to 30 psig
(0.4 to 2.0 bar)
Snap action control
(Type 2506S) Snap Action: Control output is at 0 or 100% of input supply pressure. Switching depends on position of sensor and is adjustable.
0 to 20 psig
(0 to 1.4 bar) or
0 to 35 psig
(0 to 2.4 bar)
Proportional-plus-reset
control (Type 2516)
Proportional Band: Adjustable from 0 to 200% of transmitter signal. Recommended setting is
from 20 to 200%.
Reset: Adjustable form 0.01 to 74 minute per repeat with standard reset valve setting. 3 to 15 psig
Proportional-plus-reset with
differential relief control
(Type 2516F)
Proportional Band: Adjustable from 0 to 200% of transmitter signal. Recommended setting is
from 20 to 200%.
Reset: Adjustable from 0.01 to 74 minute per repeat with standard reset valve setting.
Differential Relief: Provides relief when output pressure falls or when output pressure rises
depending on valve adjustment.
3
to
15
sig
(0.2 to 1.0 bar) or
6 to 30 psig
(0.4 to 2.0 bar)
1. Proportional control is continuously active between 0 and 100 percent of the transmitter signal span. Differential gap provides snap action between 0 and 100 percent of the
transmitter signal. Do not use reset controllers in snap action.

Types 2506, 2516, 2516F
4
Table 3. Supply Pressure Data
OUTPUT SIGNAL
RANGE
STANDARD SUPPLY
AND OUTPUT
PRESSURE GAUGE
INDICATIONS(1)
NORMAL
OPERATING
SUPPLY
PRESSURE(2)
AIR CONSUMPTION AT
NORMAL OPERATING
SUPPLY PRESSURE
INDICATIONS
(1)
Psig Bar Minimum(3) Maximum(4)
3 to 15 psig (0.2 to 1.0 bar) 0 to 30 psig 20 1.4 4.2 scfh(5) 27 scfh(5)
6 to 30 psig (0.4 to 2.0 bar) 0 to 60 psig 35 2.4 7 scfh(5) 42 scfh(5)
1. Consult your Fisher Controls sales office or representative for gauges calibrated in
other units of measurement.
2. Control and stability may be impaired if this pressure is exceeded.
3. At zero or maximum proportional band or span setting.
4. At setting in middle of proportional band or span range.
5. If air consumption is desired in normal m3/hr at 0°C and 1.01325 bar, multiply scfh
by 0.0268.
Figures 3 through 8 show dimensions and connection
locations used when you install a receiver/controller.
Actuator Yoke Mounting
See figure 4 for a typical mounting plate. Key numbers
are shown in figure 5.
1. Locate the mounting plate (key 164, figure 5). Se-
lect appropriate mounting holes in the mounting plate
for the receiver/controller. Then, align the mounting
holes in the mounting plate with the mounting holes in
the receiver/controller case.
2. Place the two cap screws (key 48) through the
mounting plate from “back to front”. Engage the cap
screw threads in the mounting holes in the receiver/
controller case and tighten the cap screws to attach
the mounting plate to the back of the receiver/control-
ler.
3. Place cap screws (key 39) through the yoke mount-
ing holes in the mounting plate from “front to back”.
Place a spacer (key 174) over the threads of the cap
screws extending from the mounting plate to properly
separate the mounting plate and the lower yoke boss
of the actuator (figure 5).
4. Attach the mounting plate with receiver/controller to
the lower yoke boss of the actuator yoke. Be sure the
spacers support the mounting plate. Be sure the re-
ceiver/controller is parallel with the actuator yoke and
then tighten the cap screws into the yoke boss.
5. If supply pressure is piped through a filter/regulator,
bolt the regulator directly to the upper yoke boss using
the cap screws (key 85). Provide appropriate piping
from the filter/regulator output connection to the re-
ceiver/controller supply connection.
Wall Mounting
See figure 6 for key number locations. The mounting
plate is shown in figure 5.
Figure 3. Dimensions and Location of Connections
AD4913-H
A3844-1 / IL
1. Install lock washers (key 83) on the cap screws
(key 39). Then, insert the cap screws through the
mounting plate from “back to front“. Place a spacer
(key 174) over the threads of each cap screw as it ex-
tends from the mounting plate. The spacers are re-
quired to properly separate the receiver/controller from
the mounting plate. Then, thread the cap screws into
the mounting holes in the receiver/controller case and
tighten.

Types 2506, 2516, 2516F
5
Figure 4. Mounting Plate for Y oke Mounting, W all Mounting
IC2218-E / IL
Figure5. Y oke Mounting
AD4913-H
A3848-1 / IL
2. Install lock washers (key 83) on the cap screws
(key 48). Then, insert the cap screws through the
mounting plate from ‘‘front to back’’. Place a spacer
(key 174) over the threads of each cap screw as it ex-
tends from the mounting plate. The spacers are re-
quired to properly separate the mounting plate from
the wall mounting position. Then, thread the cap
screws into holes prepared at the wall mounting posi-
tion and tighten.
3. Provide appropriate piping from the filter/regulator
output connection to the receiver/controller supply
connection.
Actuator Diaphragm Case Mounting
To mount a receiver/controller to the diaphragm casing
of a standard Fisher Controls diaphragm actuator, re-
move two hex nuts and hex head cap screws securing
the upper and lower diaphragm casings. If necessary,
refer to the appropriate actuator instruction manual to
locate the hex head cap screws and nuts.
Figure6. W all Mounting
AD4913-H
A3847-1 / IL
Figure 7. Case Mounting
AD4913-H
A3846-1 / IL
See figure 7 for key number locations.
1. Locate the receiver/controller mounting holes in
mounting bracket (key 164, figure 7).
2. Place the two cap screws (key 48) through the re-
ceiver/controller mounting plate holes from ‘‘back to
front’’. Engage the threads in the receiver/controller
mounting holes and tighten the cap screws to attach
the mounting plate to the back of the receiver/control-
ler.
3. Locate the receiver/controller mounting position on
the horizontal edge of the diaphragm case. A typical
Fisher Controls diaphragm actuator features upper
and lower diaphragm casings held together with hex
head cap screws and hex nuts. Remove the hex nuts
from two hex head cap screws joining the upper and
lower casing. Then, remove the cap screws.
4. Place the mounting bracket over the empty casing
holes. Insert the casing cap screws through the
mounting bracket, upper casing, and lower casing.

Types 2506, 2516, 2516F
6
Add the nuts and tighten to secure the mounting
bracket with receiver/controller to the casing.
5. If supply pressure is piped through a filter/regulator,
the regulator may be attached in one of two locations:
DAttach the regulator directly to the upper yoke
boss using the cap screws (key 85) for yoke mounting.
DAttach the regulator to the casing using a mount-
ing bracket (key 177). The mounting bracket for the
regulator is the same as the mounting bracket for the
receiver/controller. Follow steps 1 through 4 to mount
the regulator.
6. Connect the filter/regulator output connection to the
receiver/controller supply connection.
Pipestand Mounting
See figure 8 for key number locations.
1. Locate the mounting plate (key 164). Select ap-
propriate mounting holes in the mounting plate for the
receiver/controller. Then, align the mounting holes in
the mounting plate with the mounting holes in the re-
ceiver/controller case.
2. Place the two cap screws (key 48) through the
mounting plate from ‘‘back to front’’. Place a spacer
(key 174) over the threads of each cap screw as it ex-
tends from the mounting plate. The spacers are re-
quired to properly separate the receiver/controller from
the mounting plate.
3. Engage the cap screw threads in the mounting
holes in the receiver/controller case and tighten the
cap screws to attach the mounting plate to the back of
the receiver/controller.
4. Attach the mounting plate with receiver/controller to
a 2-inch (nominal) pipe with pipe clamps (key 175).
Each pipe clamp includes two nuts. Tighten clamp
nuts.
5. If supply pressure is piped through a filter/regulator,
the regulator may be attached to the mounting plate
using cap screws (key 85), lock washers (key 84), and
hex nuts (key 40).
6. Provide appropriate piping from the filter/regulator
output connection to the receiver/controller supply
connection.
2500 Series Controller/Transmitter and
2506 Series Receiver/Controller
Mounting
If the controller/transmitter and receiver/controller are
ordered simultaneously, the factory will mount them
together before shipment (figure 9). For examples of
Figure 8. Pipestand Mounting
AD4913-H
A3845-1 / IL
typical transmitter/receiver mounting arrangements,
see figures 10 and 11.
If the receiver/controller is ordered separately for use
with a 2500 Series controller/transmitter, it may not
have the required mounting parts. If mounting parts
are required, consult the parts list under the specific
mounting application.
See figure 9 for key number locations.
1. Install lock washers (key 83) on the cap screws
(key 39). Then, insert the cap screws through the
mounting plate from ‘‘back to front’’. Thread the cap
screws into the mounting holes in the receiver/control-
ler case and tighten.
2. Install lock washers (key 83) on the cap screws
(key 48). Then, insert the cap screws through the
mounting plate from ‘‘back to front’’. Thread the cap
screws into the mounting holes in the controller/trans-
mitter.
3. If supply pressure is piped through a filter/regulator,
bolt the regulator to the back of the controller/transmit-
ter.
4. Provide appropriate piping connections between
the units as shown in figures 10 or 11.
Connections
WARNING
The controller is capable of providing
full supply pressure to connected equip-
ment. To avoid personal injury and
equipment damage, make sure the sup-
ply pressure never exceeds the maxi-
mum safe working pressure of any con-
nected equipment.

Types 2506, 2516, 2516F
7
Figure 9. 2500 Series Controller -T ransmitter and 2506 Series Receiver -Controller Mounting
AR5748-B
3V7594-A
B2115-1 / IL
To complete the installation of a receiver/controller,
make connections with tubing and fittings between the
receiver/controller and the actuator. The fittings, tub-
ing, and mounting parts required depend on the type
number and optional equipment such as filter, regula-
tor, and bypass valve.
All pressure connections on the 2506 Series receiver/
controllers are 1/4-inch NPT female fittings (figures 3,
9). Use 1/4-inch piping or 3/8-inch tubing to these con-
nections.
If remote venting is required, see the Vents subsection
below.
Supply Connection
WARNING
Personal injury or property damage may
occur from an uncontrolled process if
the supply medium is not clean, dry, oil-
free, or non-corrosive gas. Industry in-
strument air quality standards describe
acceptable dirt, oil, and moisture con-
tent. Due to variations in nature of the
problems, these influences can have on
pneumatic equipment, Fisher Controls
has no technical basis on which to rec-
ommend the level of filtration equipment
required to prevent performance degra-
dation of pneumatic equipment. A filter
or filter regulator capable of removing
particles 40 microns in diameter should
suffice for most applications. Use of
suitable filtration equipment and the es-
tablishment of a maintenance cycle to
monitor its operation is recommended.
If the existing supply is corrosive, make
sure the tubing and instrument compo-
nents that contact the corrosive medium
are of suitable corrosion-resistant mate-
rials, or change to a noncorrosive sup-
ply medium.
CAUTION
Personal injury or property damage may
occur from bursting due to overpressur-
ing any system component. To avoid
injury or damage, provide pressure-
relieving or pressure-limiting devices if
supply or input pressure could exceed
the maximum allowable pressures listed
in table 3.
It is recommended that supply pressure pass through
a filter/regulator combination such as a 67AFR. See
table 3 for recommended supply pressures to the re-
ceiver/controller.
Typical supply pressure for the 67AFR is clean dry air
or a gas at a pressure of 35 psig (2.5 bar) to a maxi-
mum of 250 psig (17 bar). For specific regulator limits,
see the appropriate regulator instruction manual.

Types 2506, 2516, 2516F
8
Figure 10. T ypical Transmitter with Receiver and Control Valve Installation Assembly
DF5357-A
A3701-2 / IL
Output Connections
See figure 3.
Use 3/8-inch tubing between the actuator and the re-
ceiver/controller. Connect the output (diaphragm) con-
nection to the appropriate actuator connection.
Instrument Connection
See figure 3.
Use 3/8-inch tubing to connect the output from the
control device to the INSTRUMENT connection on the
receiver/controller.
Vents
WARNING
If a flammable, toxic, corrosive, or reac-
tive gas is used as supply pressure me-
dium, personal injury or property dam-
age could result from fire or explosion
caused by the accumulated gas. Injury
or property damage could also result
from contact with the flammable, toxic,
corrosive, or reactive gas.
The case and cover assembly does not
form a gas-tight seal and flammable,
toxic, corrosive, or reactive gas could
leak from this unit. Therefore, if the re-
ceiver/controller unit is enclosed, install
a remote vent line to remove part of the
exhaust gas to a properly ventilated
area. However, a remote vent line can-
not be relied upon to remove all hazard-
ous gas. Vent line piping should comply
with local and regional codes and
should be as short as possible. Select
vent line piping with adequate inside
diameter and install with few bends to
reduce case pressure buildup.
See figure 3 for vent locations.
A receiver/controller may be ordered with one of two
vent configurations:
DStandard, with 1/4-inch case vent open. The
standard receiver/controller case (key 1,
p/n 4D396044012) is not drilled and tapped for the
optional tapped vent.

Types 2506, 2516, 2516F
9
Figure 1 1. T ypical T ransmitter and Receiver Installation with an Indicator and Remote Set Point Connection
DF5379-A
A3702-2 / IL
DOptional, with tapped vent, for applications re-
quiring vent line attachment to receiver/controller case.
The optional receiver/controller case (key 1, p/n
2E355544012) features a tapped vent for applications
requiring a remote vent line. The standard case vent
should be sealed with a machine screw.
An air vent plug (key 137) with gasket (key 138) and
hex nut (key 139) can be added to the tapped vent.
The air vent plug provides a 1/4-inch NPT female fit-
ting.
DReceiver/controllers feature an open bellows
vent/remote set point connection. An external vent
assembly (key 128) is recommended if the remote set
point connection is not made. The external vent as-
sembly can be driven into the open bellows vent.
Protect all vents against the entrance of any foreign
material that could plug them. Check the vents periodi-
cally to be certain they are not plugged.
Remote Set Point Connection
See figure 3.
The remote set point connection is made at the tapped
bellows vent/remote set point connection on the rear
of the receiver/controller case. A vent assembly (key
128) is recommended if the remote set point connec-
tion is not made.
To make a remote set point connection, remove the
vent assembly from the connection. Install piping from
the remote set point loader or regulator.
When a panel loader or regulator is used for remote
set point adjustment, as shown in figure 11, an adjust-
able output range of 3 to 15 psig (0.2 to 1 bar) or 6 to
30 (0.4 to 2 bar) is required to match the receiver/con-
troller output range.
Use clean, dry air or a noncorrosive gas for supply
pressure to the remote set point bellows.

Types 2506, 2516, 2516F
10
Startup
It is important that the output range of the transmitter
or other device used as the input to the receiver/con-
troller be adjusted so that its output range corresponds
to the input signal range of the receiver/controller. Be
sure the receiver/controller action (direct or reverse) is
correct for the application.
To start the system:
DFor all receiver/controllers, perform steps 1
and 2.
1. See table 3 for specific pressure limits. Be sure the
correct supply pressure is available. If necessary, ad-
just the regulator to 20 psig (1.4 bar) for a 3 to 15 psig
(0.2 to 1 bar) or 35 psig (2.4 bar) for a 6 to 30 psig
(0.4 to 2 bar) receiver/controller range.
2. Turn on the supply pressure to the receiver/control-
ler.
DTo make the proper level or output pressure
setting for a Type 2506 receiver/controller, go to
step 3. To make the proper level or output pres-
sure setting for a Type 2516 receiver/controller, go
to step 9. For the Type 2506 receiver/controller:
3. Set the proportional band adjustment at 15 percent
(1.5 on the adjustment dial). At this setting, a 1.8 psig
(0.1 bar) input pressure causes a 12 psig output pres-
sure change. Operate the receiver/controller with the
proportional band setting as small as possible.
4. Provide an input pressure equal to the output pres-
sure of the transmitter at a value desired or halfway
between the transmitter output range. For example, on
a receiver/controller, if the desired control point is half-
way between the ends of the displacer, provide an in-
put of 9 psig (0.6 bar) which is halfway between 3 and
15 psig (0.2 and 1 bar) transmitter output range.
5. Set the output pressure adjustment to give a con-
troller output that is halfway between its output range.
6. Vary the input pressure to be sure the full controller
output pressure range is produced within the specified
input pressure range.
7. Lock the output pressure adjustment and connect
the receiver/controller to the final control element.
8. If the proportional band setting is too narrow, caus-
ing instability, widen the proportional band just enough
to stabilize control. After making this adjustment, it
may be necessary to reset the output pressure slightly
to produce the proper control range.
DFor the Type 2516 receiver/controller:
9. Set the proportional band adjustment dial at 0 per-
cent (minimum proportional band).
10. Set the reset adjustment to the fastest speed
(0.005 minutes-per-repeat).
11. Provide an input pressure equal to the output
pressure of the transmitter at a value desired or half-
way between the transmitter output range. For exam-
ple, on a receiver/controller, if the desired control point
is halfway between the ends of the displacer, provide
an input of 9 psig (0.6 bar) which is halfway between 3
and 15 psig (0.2 and 1 bar) transmitter output range.
12. Adjust the output pressure dial to give a controller
output somewhere within the output range of the re-
ceiver/controller.
13. Lock the output pressure dial and connect to the
final control element.
14. If the proportional band is too narrow causing in-
stability, widen the proportional band or slow the reset
just enough to stabilize control.
Adjustments
To adjust the receiver/controller, open the cover and
locate the appropriate adjustment. See figures 15, 18,
19 for the location of adjustments.
Set Point Adjustment
To adjust the level set point, loosen the knurled knob
and rotate the knob around the INCREASE OUTPUT
PRESSURE or RAISE LEVEL dial. To raise fluid or
interface level or increase density, rotate the knob in
the direction of the arrow.
To lower level or decrease density, rotate the knob in
the opposite direction. The INCREASE OUTPUT
PRESSURE or RAISE LEVEL dial is graduated (in
percent) to show approximate indications of the receiv-
er/controller set point. When making adjustments, do
not rely only on the dial setting. Monitor the process
fluid level to be sure the receiver/controller attains the
desired set point.
For differential gap receiver/controllers, the level set-
ting adjustment determines the location of the gap
within the range of the sensing element.
Remote Set Point Adjustment
On a receiver/controller with remote set point adjust-
ment capability, adjust the set point by changing the
pressure to the remote set point connection. Increase
the remote set point signal pressure to decrease the
receiver/controller set point (for a direct acting receiv-
er/controller) or increase the receiver/controller set
point (for a reverse acting receiver/controller).

Types 2506, 2516, 2516F
11
Proportional Band Adjustment
For proportional and proportional-plus-reset receiver/
controllers, the proportional band adjustment deter-
mines the amount of change in the input pressure re-
quired to change the controller output signal from one
limit of the output signal range to the other limit (with-
out the effect of reset action).
Proportional band is expressed as a percent of the
sensing element range. That is, with a proportional
band of 100 percent, an input pressure change equal
to the sensing element span would change the control-
ler output from one limit to the other. With a propor-
tional band of 50 percent, an input pressure change
equal to one half the sensing element range would
change the controller output from one limit to the oth-
er.
The proportional valve dial is graduated from 0 to 10.
A setting of 10 on the dial represents a proportional
band of 100 percent; 5 represents a proportional band
of 50 percent.
The receiver/controller is designed for a maximum pro-
portional band of 200 percent. The effective band is
determined by the location of the adjustable nozzle
assembly (key 17, figure 15) in the slot in the level set
arm (key 28). Most applications require a maximum
band of 100 percent so, at the factory, a receiver/con-
troller unit is set to the 100 percent value. This setting
places the nozzle at a point that is halfway between
the bellows assemblies. To adjust the proportional
band, rotate the adjustment counterclockwise to
broaden the setting. Rotate the adjustment clockwise
to narrow the setting.
In some applications, a 200 percent proportional band
range may be required. To obtain the 200 percent
range, move the nozzle assembly to the extreme right
end of the slot in the level set arm.
For differential gap receiver/controllers, the proportion-
al band adjustment determines the width of the differ-
ential gap. This is the difference between the input
pressures at which the controller output switches from
zero to full supply pressure and back to zero.
Reset Adjustment
(Type 2516 Receiver/Controller Only)
On proportional-plus-reset receiver/controllers, the
reset adjustment determines the time in minutes re-
quired for the reset action to produce a change in out-
put pressure equal to the change that has occurred
due to proportional band action.
To adjust the reset action, rotate the adjustment clock-
wise to decrease, or counterclockwise to increase the
minutes per repeat. Increasing the minutes per repeat
provides a slower reset action.
Anti-Reset Windup Valve Adjustment
(Type 2516F Receiver/Controller Only)
The anti-reset windup valve provides differential pres-
sure relief. Its adjustment control extends from the
back of the receiver/controller case (figure 19).
The factory sets this valve to relieve when the differen-
tial pressure between the proportional and reset bel-
lows reaches 5 psi. To set the valve to relieve when
the differential pressure is as low as 2 psig, turn the
adjustment screw clockwise. To set the valve to re-
lieve when the differential pressure is as high as 7
psig, turn the adjustment screw counterclockwise. The
minimum differential setting yields the minimum differ-
ential set point overshoot during startup.
Depending on the characteristics of the process, the
anti-reset windup valve can be positioned so that the
arrow on the case points to the letters RE or, to the
letter P on the back of the manifold. If the arrow points
to P, the valve opens when receiver/controller output
pressure rises. If the arrow points to RE, the valve
opens when receiver/controller output pressure falls.
Calibration
WARNING
The following calibration procedures
require taking the controller out of ser-
vice. To avoid personal injury and prop-
erty damage caused by an uncontrolled
process, provide some temporary
means of control for the process before
taking the receiver/controller out of ser-
vice.
See figure 15 for key number and adjustment loca-
tions.
When performing the following calibration procedures,
open loop conditions must exist and make provisions
to monitor the output pressure. One way to obtain an
open loop is to disconnect the controller output signal
line and install a pressure gauge.

Types 2506, 2516, 2516F
12
Note
When calibrating a combined controller
arrangement such as the Type 2500 with
the Type 2506 or 2516 (figure 9), cali-
brate the Type 2500 controller/transmit-
ter first.
For a direct action receiver/controller:
1. Adjust the INCREASE OUTPUT PRESSURE ad-
justment to mid-range on the scale.
2. Turn the proportional band adjustment to 100 per-
cent of the scale range.
3. For Type 2516 only, turn the reset valve adjust-
ment fully clockwise.
4. Adjust the input pressure to 9 psig (0.6 bar) for a 3
to 15 psig (0.2 to 1 bar) or 18 psig (1.2 bar) for a 6 to
30 psig (0.4 to 2 bar) receiver/controller.
5. For Type 2516 only, turn the reset valve adjust-
ment fully counterclockwise (to the CLOSED position).
This locks 9 psig (0.6 bar) or 18 psig (1.2 bar) in the
reset bellows.
6. If the output pressure is 9 psig (0.6 bar) for a 3 to
15 psig (0.2 to 1 bar) or 18 psig (1.2 bar) for a 6 to 30
psig (0.4 to 2 bar) receiver/controller, go to step 8. If
not, continue with step 7.
7. If the output pressure span is too low, move the
nozzle down towards the flapper, if output pressure is
too high, move the nozzle up. Continue by trial and
error until the desired setting is obtained.
8. Adjust the input pressure to 15 psig (1 bar) for a 3
to 15 psig (0.2 to 1 bar) or 30 psig (2 bar) for a 6 to 30
psig (0.4 to 2 bar) receiver/controller.
9. The output pressure should be 15 psig (1 bar) for a
3 to 15 psig (0.2 to 1 bar) or 30 psig (2 bar) for a 6 to
30 psig (0.4 to 2 bar) receiver/controller. If output pres-
sure is within application tolerance, proceed to step
12. If not, continue with step 10.
10. If the output pressure span is narrow, move the
nozzle slightly to the left or, if the output pressure span
is too wide, move it to the right and repeat steps 4 and
6 through 10.
11. Repeat the steps until the receiver/controller is
within application requirements.
12. Reconnect the receiver/controller to the control
loop and see the Adjustment section.
Figure 12. T ype 2506 Multi-T rol

Direct Action
Receiver/Controller Schematic
BD2388-F
A3849 / IL
Principle of Operation
The 2506 Series uses a basic pressure balance relay
system (figure 12). The relay is connected so that sup-
ply pressure is fed to the inlet side of the relay valve
and the fixed restriction. From this restriction, the air
pressure bleeds into the relay chamber on one side of
the large diaphragm and also to the nozzle. As long as
there is no pressure change on either diaphragm, the
relay valve remains in equilibrium with both inlet and
exhaust ends closed. The area ratio of the large dia-
phragm to the small diaphragm is 3 to 1. A 12 psi
pressure change on the small diaphragm is balanced
by a 4 psi change in the large diaphragm.
The following descriptions show how the relay works
with the standard proportional, proportional-plus-reset,
and proportional-plus-reset with anti-reset windup re-
ceiver/controllers.
Type 2506 Receiver/Controllers
See figure 12.
As long as the process level remains constant, the
transmitter input pressure to the receiver/controller
remains constant. Inside the receiver/controller, the
bellows beam/flapper assembly remains in a steady-
state position.
The position of the bellows beam allows the supply
pressure to bleed through the nozzle as fast as it en-

Types 2506, 2516, 2516F
13
Figure 13. T ype 2516 and 2516F Multi-T rol

Direct Action Receiver-Controller Schematic
B2116 / IL
ters the relay through the fixed restriction. A change in
transmitter input pressure repositions the beam/flapper
assembly with respect to the nozzle.
On a direct action receiver/controller, an increase in
transmitter input pressure causes a pressure increase
in the sensing bellows assembly, tending to push the
beam toward the nozzle. This restricts the escape of
supply pressure through the nozzle, thus increasing
the pressure on the large diaphragm in the relay. This
opens the relay valve to the supply pressure allowing
an increase in output pressure to the control valve.
A decrease in transmitter input pressure decreases
the pressure in the input bellows assembly by moving
the beam away from the nozzle. This allows the sup-
ply pressure to bleed through the nozzle faster than it
can enter through the fixed restriction in the relay. The
relay valve opens, exhausting the output pressure
which vent through the relay exhaust port. This action
decreases output pressure to the control valve.
Type 2516, 2516F
Receiver/Controllers
The action of a proportional-plus-reset controller (fig-
ure 13) is similar to that of a proportional controller
except that feedback from the controller output pres-
sure is piped to a reset bellows as well as to the pro-
portional bellows.
Users can adjust the reset valve on the Type 2516
and 2516F to channel some or all of the proportional
pressure into the reset bellows that opposes the pro-
portional bellows action. This arrangement automati-
cally reduces the effect of any proportional overcorrec-
tion by a set amount per time interval, as long as there
is a deviation from the control point.
The Type 2516F receiver/controller also features an
anti-reset windup valve. This valve provides differential
pressure relief to prevent proportional pressure from
exceeding reset pressure by more than a set value.
The proportional valve output pressure registers on
one side of the diaphragm chamber and the reset
valve output pressure registers on the other side dia-
phragm. A sudden increase in the output pressure
causes a rapid pressure increase in the proportional
bellows and in the proportional side of the diaphragm
chamber. If the diaphragm pressure of the relief valve
exceeds that of the spring side by the amount of the
relief pressure setting, the relief diaphragm moves off
the orifice in the differential relief valve. This allows the
pressure on the proportional side of the diaphragm to
bleed into the reset system. This action provides quick
relief of excessive proportional pressure and reduces
the time required by the system to return to the control
point. A user can reverse the differential relief action to
relieve on decrease output pressure.

Types 2506, 2516, 2516F
14
Maintenance
Receiver/controller parts are subject to normal wear
and may require inspection or replacement. The fre-
quency of inspection and parts replacement depends
upon the severity of the service conditions. When in-
spection or repairs are needed, disassemble only
those parts necessary to accomplish the job.
Select the appropriate maintenance procedures and
perform the appropriate steps. Each procedure re-
quires that supply pressure and process pressure be
shut off before beginning maintenance.
Establish a maintenance cycle to regularly clean the
vents (figure 3). Also, establish a maintenance cycle to
clear the relay orifice (key 88, figure 16) by pushing in
the plunger of the core assembly (key 89).
Due to the care Fisher Controls takes in meeting all
manufacturing requirements (For example: heat treat-
ing, dimensional tolerances, and other manufacturing
specifications), use only genuine replacement parts
manufactured or furnished by Fisher Controls.
WARNING
The following maintenance procedures
require taking the controller out of ser-
vice. To avoid personal injury and prop-
erty damage caused by an uncontrolled
process, provide some temporary
means of controlling the process before
taking the receiver/controller out of ser-
vice. Release any trapped pressure from
the controller and vent supply pressure
before disassembly.
Changing Controller Action
See figure 15 for key number locations, unless other-
wise directed.
Figure 14. Relay Alignment T ool (Part Number 15A3519 X012)
15A3519-B
A5871 / IL
INCH
(mm)
NOTES:
THESE DIAMETERS MUST BE CONCENTRIC
WITHIN 0.001 INCHES (0.025)
THESE DIAMETERS MUST BE CONCENTRIC
WITHIN 0.005 INCHES (0.1)
2
1
Note
Do not switch the Type 2516 receiver/
controller to snap (S) action.
To change controller action, reposition one or both
switch plates (key 132), which are mounted on the left
or right bellows assemblies (key 134 or 133 respec-
tively). When either switch plate (key 132) is removed,
the raised letters D, R, S, and P are visible on the bel-
lows frame located under the switch plate (figure 14).
These letters correspond to: direct (D), reverse (R),
snap (S), and proportional (P) control action. To obtain
the type of control desired, position the switch plates
so that the proper letter appears in the cut-out corner,
as explained below:
DThe bellows assembly on the left provides either
direct or reverse action. The receiver/controller (Type
2506 or 2516) can be changed between direct and
reverse action be repositioning the switch plate (key
132) on the left. Direct action (D) is when increasing
transmitter input pressure increases receiver/controller
output pressure. To obtain direct action, position the
switch plate so the D is visible. Reverse action (R) is
when decreasing transmitter input pressure increases
receiver/controller output pressure. To obtain reverse
action, position the switch plate so the R is visible.

Types 2506, 2516, 2516F
15
Table 4. troubleshooting Chart
Fault Possible Cause Check Correction
1. Process wanders or cycles
around setpoint. 1.1 Proportional band or specific
gravity adjustment incorrect, or
improperly tuned control loop.
1.1 Insure that the prestartup
procedures are completed correctly.
Tune control loop.
1.1 If stable control cannot be
attained, and all other elements are
functionally correct, examine other
possible causes related to the
controller/transmitter.
Note: 1.2 is for Type 2500 and
2506/16 combination.
1.2 Input signal varying to the
Type 2506/16. 1.2 Use a pressure gauge to monitor input stability. 1.2 Apply stable input pressure source. Tune the 2500
controller/transmitter.
1.3 Supply pressure varying, or
incorrect supply pressure setting. 1.3 Use input pressure gauge to monitor stability. Make sure
regulator supply pressure is within
limits.
1.3 Apply correct supply pressure.
It is recommended to use one
regulator per instrument.
1.4 Relay malfunction. 1.4 Check for relay malfunction by
using the testing relay deadband
procedure.
1.4 Depress plunger to clean out
the fixed restriction. Replace or
repair relay using the procedure in
the maintenance section.
2. Receiver/controller controlling
off setpoint or switching point. 2.1 Supply pressure not set
correctly. 2.1 Make sure regulator supply pressure is set correctly. Make sure
regulator supply pressure is within
limits.
2.1 Reset the regulator pressure.
If the problem recurs, replace or
rebuild the regulator. Provide a
regulator input pressure within
regulator limits.
2.2 Leak in the receiver/controller
loop. 2.2 Use soap and water to check for internal and external leaks. 2.2 Replace or repair leaking parts as necessary.
3. Receiver/controller cannot
obtain full output range. 3.1 Supply pressure not set
correctly. 3.1 Make sure supply pressure is set correctly. Make sure regulator
supply pressure is within limits.
3.1 Reset the regulator pressure.
If problem recurs, replace or rebuild
the regulator. Provide a regulator
input pressure within regulator
limits.
3.2 Nozzle adjustment. 3.2 Insure the nozzle is not loose. 3.2 Perform calibration procedures.
3.3 Relay malfunction. 3.3 Check for relay malfunction by
using the testing relay deadband
procedure.
3.3 Depress plunger to clean out
the fixed restriction. Replace or
repair relay using the procedure in
the maintenance section.
3.4 Leaking controller/transmitter
loop. 3.4 Use soap and water to check for internal and external leaks. 3.4 Replace or repair leaking parts as necessary.
4. Receiver/controller remains at
full or zero output pressure. 4.1 Supply or output pressure
gauge malfunction. 4.1 Insure the pressure gauges are registering correctly. 4.1 Replace pressure gauges. Use corrective action given for
section 3 of this table.
4.2 Flapper adjustment. 4.2 Insure the flapper is not loose
on the torque tube shaft. Insure the
flapper is centered on the nozzle.
4.2 Replace or tighten flapper
assembly as necessary and/or
center flapper on nozzle.
4.3 Relay malfunction. 4.3 Check for relay malfunction by
using the testing relay deadband
procedure.
4.3 Depress plunger to clean out
the fixed restriction. Replace or
repair relay using the procedure in
the maintenance section.
DThe bellows assembly on the right provides either
proportional (P) or snap (S) action depending on the
switch plate position. For all types of receiver/control-
lers, to obtain proportional action, position the switch
plate so the P is visible. For Type 2506 receiver/con-
trollers, to obtain snap action, position the switch plate
so the S is visible.
Troubleshooting
As an aid to troubleshooting, see table 4 for a listing of
some common operating faults, their probable cause,
and suggested procedures for correcting the faults.
Testing Relay Deadband
1. Replace the PROPORTIONAL BAND adjustment
assembly with a 1/8-inch NPT pipe plug according to
the sections for changing proportional, reset, or anti-
reset windup valves.
2. Turn on the supply pressure and set it to 20 or 35
psig (1.4 bar or 2.4 bar) according to supply pressure
requirements of the receiver/controllers.
3. By changing the process variable and adjusting the
INCREASE OUTPUT PRESSURE control, set the out-
put pressure to 15 or 30 psig. While monitoring the
output pressure, slowly change the process until an

Types 2506, 2516, 2516F
16
output pressure change just begins. Record the value
of the process variable at this detection point.
4. Change the process variable in the opposite direc-
tion until another output pressure change just begins.
Again, record the value of the process variable. If the
difference between the two values (the deadband) is
more than 0.2 percent of the maximum displacer
length, the relay must be repaired or replaced.
5. See the relay removal and replacement procedures
and, if necessary, the relay disassembly and assembly
procedures if the relay is to be repaired.
6. Turn off the supply pressure, remove the pipe plug,
and install the PROPORTIONAL BAND adjustment
assembly.
Replacing Receiver/Controller Parts
See figure 15 for key number locations, unless other-
wise indicated.
Bellows Replacement
Use the following bellows replacement procedure to
replace defective bellows or change the output signal
range.
Removal
1. Remove the relay tubing assembly (key 11), the
INCREASE OUTPUT PRESSURE plate (key 35), and
the attached restriction plug orifice assembly (key 11).
2. Take out the four bellows screws (key 96). These
are special screws with air passages in them so, be
careful not to lose them.
3. Compress the bellows (both are key 65) slightly
and slip them out of the bellows frame (keys 133 or
134).
4. Unscrew the bellows from the beam (key 59). A
gasket (key 79) fits between the end of the bellows
and the bellows frame.
5. Inspect each bellows and gasket and, if necessary,
replace them.
Replacement
1. First install the bellows gasket (key 79), then install
each bellows (key 59) by screwing it onto the beam
(key 59).
2. Compress the bellows slightly and slip them into
the bellows frame (key 133 or 134).
3. Secure the screws (key 96) and replace the tubing.
4. Check all tubing connections and the bellows
screws for leaks. Tighten as necessary and proceed to
the Calibration section.
5. If a bellows assembly (key 65) with a different
range is installed, replace the gauges (key 20 or 135)
with those with an appropriate measurement capabili-
ty.
Changing the Relay
Remove the relay to clean, repair, or replace it.
Removal
1. Disconnect the tubing (key 11) from the relay.
2. Remove two relay mounting screws, the relay, and
the relay gasket (keys 43, 34, and 22).
Replacement
1. Install a new gasket (key 22), the replacement
relay (key 34), and secure with two mounting screws
(key 43).
2. Connect the tubing (key 11) to the relay.
3. See the testing relay deadband procedures in this
section.
4. If the deadband is within tolerance, see the Calibra-
tion section.
Relay Assembly Maintenance
The alignment tool shown in figure 14 may not be re-
quired for assembly of the relay, but it does prevent
excessive air consumption and deadband. If low air
consumption and minimum deadband are required,
make or purchase the alignment tool before disassem-
bling the relay.
See figures 16, 17 for key number locations, unless
otherwise indicated.
Disassembly
1. Remove the relay according to the changing relay
procedures in this section.
2. Remove the orifice assembly (key 88) and check to
see if the orifice is plugged or damaged. Also, inspect
the O-ring (key 90).
3. Remove six casing screws and washers (keys 96
and 98) and, remove the diaphragm (key 91). For a
high temperature relay, also remove the gasket (key
100) that covers the diaphragm.

Types 2506, 2516, 2516F
17
4. Remove the spacer ring (key 84), diaphragm as-
sembly (key 86), and relay spring (key 92) from the
relay body (key 83). On a high temperature relay, also
remove the gasket (key 99) from underneath the dia-
phragm assembly.
5. Remove the four screws (key 97), spring plate (key
95), spring plate gasket (key 94), spring (key 93), and
inner valve (key 87).
6. Inspect the valve seats for roughness due to corro-
sion. One seat is in the diaphragm assembly and the
other is in the relay body (key 83). If necessary, re-
place the parts.
7. Inspect the diaphragms and gaskets, and replace
them if necessary. Also, replace the spring and inner
valve (keys 92 and 87) if they show signs of corrosion.
The lower diaphragm comes as part of an assembly
and must be installed as an assembly.
8. Clean all parts thoroughly before assembly.
Assembly
1. Place the relay spring in the relay body. For a high
temperature relay, also install a bottom gasket. Install
the diaphragm assembly, spacer ring, and top dia-
phragm on the body so that all flow passage holes are
lined up. For a high temperature relay, also install a
gasket over the top diaphragm.
2. Place the casing assembly on the top diaphragm
so that the lugs on the casing and spacer ring line up
and are also lined up with the body lug.
3. Lubricate the machine screws (key 96) with Lubri-
plate MAG-1(1) or equivalent. Install the machine
screws and, for standard relays, the washers (key 98),
but do not tighten the screws.
4. If the optional alignment tool (figure 14) is available,
insert the small end of the tool into the opening in the
relay body. If the tool does not engage in the hole of
the diaphragm assembly, move the parts slightly to
reposition the diaphragm until the alignment tool does
engage the hole in the diaphragm assembly. Do not
remove the alignment tool until the machine screws
(key 96) have been tightened.
5. Tighten the machine screws (key 96) evenly. Re-
move the alignment tool (if one is used).
6. Install the inner valve, spring, gasket, and cover
plate (keys 87, 93, 94, and 95). Secure with the four
machine screws (key 97).
7. Lubricate the O-rings (key 90) with Dow Corning
Compound 111(2) or equivalent and the orifice assem-
bly (key 88) with Lubriplate MAG-1 or equivalent.
Install the O-rings on the orifice assembly and install
the orifice assembly into the casing assembly.
8. Install the relay according to the changing relay
procedures.
Changing Proportional or Reset Valve
1. Disconnect the appropriate tubing(s) from the pro-
portional or reset valve.
2. Removing the valve assembly:
a. Remove the proportional valve assembly by un-
screwing it from the relay base. Install the replace-
ment assembly.
b. Remove the reset valve assembly by unscrew-
ing the two machine screws (key 182, not shown)
located behind the reset valve on the back of the
case. Install the replacement assembly.
Parts Ordering
When replacement parts are required, always use
genuine Fisher parts.
Whenever corresponding with the Fisher Controls
sales office or representative, include the receiver/con-
troller type number and the serial number. The serial
number can be found on the nameplate. When order-
ing replacement parts, also state the complete
11-character part number of each part required as
found in the following parts list.
Parts Kits
Key Description Part Number
Receiver/Controller Repair Kits
Contains keys 17, 19, 21, 24, 38, and 45
Standard Temperature R2506X0L12
High Temperature R2506X0H12
Relay Repair Kits
Contains keys 22, 85, 86, 87, 88, 90, 91,
92, 93, 94 (99 and 100 high temperature only)
Standard Temperature RRELAYX0L12
High Temperature RRELAYX0H12
Relay Replacement Kit
Contains key 22 (43 for Type 2500 and 2502)
and the relay assembly
Standard Temperature RRELAYX0L22
High Temperature RRELAYX0H22
1. Trademark of Fiske Brothers Refining Co.
2. Trademark of Dow Corning Corp.

Types 2506, 2516, 2516F
18
Parts List
Receiver/Controller Common Parts
(figure 15)
Note
Case Vent Options
DThe standard receiver/controller case (key 1, p/n
4D396044012) features an open case vent. The case is
not drilled for the optional tapped vent.
DAll receiver/controller cases feature an open
bellows vent/remote set point connection. A external
vent assembly (key 128) is recommended if the remote
set point connection is not made.
DThe optional receiver/controller case (key 1, p/n
2E355544012) features a tapped vent for applications
requiring a remote vent line. The standard case vent is
sealed w/a machine screw. An external connection (air
vent plug, key 137) w/gasket (key 138) and hex nut (key
139) can be added to the tapped vent.
1 Controller case (controller back), die cast zinc
for Types 2506, 2516
Std: W/open case vent (no optional
tapped vent for vent line) 4D396044012
Optional: W/tapped vent for vent line
(case vent sealed with machine screw) 2E355544012
Additional option: Case pressure-tested
to 2 psig (0.1 bar). Contact your
Fisher Controls sales office or
representative to order pressure testing.
Label (key 179) is added to the case. 2E355544012
1 Controller case (controller back), die cast zinc
for Type 2516F, w/open case vent (no optional
tapped vent for vent line) 15A7611X012
2 Controller cover, die cast zinc 4D396144012
3 Door handle, steel pl 1C897225082
4 Door handle shaft, stainless steel
(not shown) 1C898414012
5 Machine screw, steel pl 1C895828982
6 Washer, stainless steel 1C897036032
7 Door hook, steel pl 1C897125082
8 Elastic stop nut, steel pl 1C895928992
9 Hinge pin, stainless steel, (2 req’d) 1C8991X0022
10* Compensator tubing assembly, proportional
Type 2506 and 2516
Copper 1D3984000A2
Stainless steel 1K674838072
Type 2516F
Copper 1D3984000A2
11 Relay tubing assembly,
Type 2506, 2516, and 2616F, copper 1H2744000A2
Type 2506 and 2516, stainless steel 1K674738072
Key Description Part Number
17 Orifice cap, brass 0X084314012
Note
Gauges
See key 135 for input (instrument) gauge or pipe plug.
20* Output (diaphragm) gauge
Triple scale
0 to 30 psig/0-0.2 MPa/0-2 bar 11B8582X012
0 to 60 psig/0-0.4 MPa/0-4 bar 11B8582X022
Dual scale
0 to 30 psig/0-2 kg/cm211B8582X042
21* Cover gasket, nitrile 1D398706062
22* Relay gasket,
Standard temperature, neoprene 1C897403012
High temperature, silicone 1N873804142
23 Relay base, die cast zinc 2D396244012
24* Relay base gasket (not shown)
Standard temperature, neoprene 1D396703012
High temperature, silicone rubber 1N874204142
25 Flexure strip, stainless steel 1C897836012
26 Flexure strip nut, steel (2 req’d) 1C897525082
27 Flexure strip base, steel 1C897725082
28 Level set arm, steel 1D398025082
29 Latch pin, steel 1C898928982
31 Nut, brass (2 req’d) (not shown) 1D397514022
32 Flapper, Invar(1) 1D398341132
34 Relay assembly
(For individual parts, see listing below)
Standard temperature 18A5299X012
High temperature 18A5300X012
35 Level adjustment assembly 10A8939X0A2
35C Level adjustment dial (not shown), aluminum
Std, clockwise adjustment 1D397411032
Optional, counter-clockwise adjustment
For use w/2500 controller 1E235318992
36 Proportional band assembly 10A9122X012
41 Screw, steel pl (2 req’d) 1C941928982
42 Machine screw, steel pl (2 req’d) 1A684928992
43 Machine screw, steel pl (2 req’d) 1D713224192
44 Machine screw, steel pl (6 req’d) 1A573328982
46 Machine screw, stainless steel (4 req’d) 1C899028982
47 Spring (not shown) 1J423437022
56 Bellows stud, brass (2 req’d) (not shown) 1D397814012
59 Bellows beam, steel pl 1D397925082
Note
Bellows Assembly
Select specific bellows assembly by application pres-
sure range.
* Recommended spare part.
1. Trademark of Metalimphy, Inc.

Types 2506, 2516, 2516F
19
Figure 15. T ypes 2506 and 2516 Receiver -Controller Assemblies
30A8956-B
C0670-2 / IL

Types 2506, 2516, 2516F
20
Key Description Part Number
65* Bellows assembly
Brass
Range:
3 to 15 psig (0.2 to 1 bar)
Gray color code 14A5726X072
6 to 30 psig (0.4 to 2 bar)
Green color code 14A5726X082
Stainless steel
Range:
3 to 15 psig (0.2 to 1 bar)
Gray color code 14A5726X102
6 to 30 psig (0.4 to 2 bar)
Green color code 14A5726X092
75 Reset tubing assembly
Type 2516 and 2516F, copper 1D3988000A2
Type 2516, stainless steel 1K674638072
77* Bellows frame gasket (2 req’d) (not shown)
Standard temperature, neoprene 1D396803012
High temperature, silicone 1N874304142
79* Bellows gasket (4 req’d)
Standard temperature, neoprene 1D397003012
High temperature, silicone 1N873604142
91 Reset restriction valve assembly
Type 2516
Standard temperature 19A4357X012
High temperature 19A4357X022
Type 2516F
Standard temperature 19A4359X012
96 Bellows screw, brass (4 req’d) 1D397614022
128 External vent assembly (not shown)
for bellows vent opening when remote
set point connection is not made
plastic/stainless steel 27A5516X012
129* Switch plate gasket (2 req’d) (not shown)
Standard temperature, nitrile 1D397103012
High temperature, silicone 1N874104142
130 Machine screw, steel pl 1B275128992
132 Switch plate, die cast zinc (2 req’d) 1D396444012
133 Right bellows frame, die cast zinc 1D396544012
134 Left bellows frame, die cast zinc 2D396344012
Note
Gauges
See key 20 for output (diaphragm) gauge.
135 Input (instrument) gauge
Triple Scale
0 to 30 psig/0-0.2 MPa/0-2 bar 11B8582X012
0 to 60 psig/0-0.4 MPa/0-4 bar 11B8582X022
Dual Scale
0 to 30 psig/0-2 kg/cm211B8582X042
135 Pipe plug (not shown), brass
Use instead of input gauge 1A6495X0052
136 Machine screw, steel pl (18 req’d) 1B783928982
137 Air vent plug, brass
For use w/optional case (key 1) featuring
tapped vent 1C442414012
138 Vent plug gasket, neoprene
For use w/key 137 1C442704082
Figure 16. Relay Diaphragm Assembly
(Standard T emperature Only)
CP1885-C
A3842-1 / IL
Key Description Part Number
139 Hex nut, steel pl
For use w/key 137 1A352424112
179 Label, paper
For case (back), if pressure-tested.
See key 1 12A9842X012
186 Anti-reset windup valve assembly
See following list for individual parts
215 Nameplate 12B6338X0A2
Relay Assembly (figures 16, 17)
83 Relay body, standard & high temperature,
Aluminum/brass 48A3776X012
84 Spacer ring, aluminum 38A3778X012
85 Casing assembly, aluminum/steel 12B0460X012
*Recommended spare parts