Siemens RC 195 User manual

Installation Instructions

Document No. 129-084

September 16, 2015

RC 195 Receiver-Controller Restrictor

and Connector Repair

Item Number 129-084, Rev. DA Page 1 of 3

Product Description

The Restrictor Kit contains three input restrictor

assemblies, one supply restrictor assembly and

seven gaskets.

The Connector Kit contains one supply connector

assembly and one input connector assembly.

Product Numbers

Restrictor Kit 195-066

Connector Kit for Multiple Input 195-067

Receiver-Controller

Connector Kit for Single Input 195-114

Receiver-Controller

Required Tools

•Small, flat-blade screwdriver

NOTE: Normally, replacing restrictors or connectors

will not affect calibration.

Before troubleshooting (Table 1), ensure that:

1. The supply pressure at the unit is constant

(± 2 psi) 22 psi (152 kPa).

2. All transmitter inputs being used are between

3 and 15 psi (21 and 103 kPa).

3. Only one restrictor (internal or external)

supplies each transmitter.

4. The transmitter calibration is correct.

Troubleshooting

Table 1. Troubleshooting Guide.

Problem Check Probable Cause Corrective Action

Control pressure

stays at

approximately zero

Rotate setpoint

adjustment screw

counterclockwise

Pressure

increases

Transmitter sensing medium

which is above (R.A.) or below

(D.A.) the proportional band

None

RC 195 out of calibration

Recalibrate

Pressure

remains

unchanged

Plugged supply restrictor

Replace supply restrictor

Plug-in connector defective

Replace plug-in connector

Receiver-controller is

defective

Replace receiver-controller

Control pressure

stays at

approximately

supply pressure

Rotate setpoint

adjustment screw

clockwise

Pressure

decreases

Transmitter sensing medium

whic

h is above (D.A.) or below

(R.A.) the proportional band

None

RC 195 out of calibration

Recalibrate

Pressure

remains

unchanged

Receiver-controller is

defective Replace receiver-controller

Transmitter

pressure stays at

approximately zero

Increase sensed

medium to upper end

of transmitter range

Pressure

remains

unchanged

Plugged input restrictor

Replace input restrictor

No restrictor supplying

transmitter

Place restrictor in the "in"'

position

Defective transmitter

Replace transmitter

Transmitter

pressure will not

build up to 15 psi

(103 kPa)

Increase sensed

medium to upper end

of transmitter range

Pressure still will

not build up to

15 psi (103 kPa)

Leak at or defective plug-in

connector

Replace plug-in connector

Defective transmitter

Replace transmitter

Low supply pressure

Increase supply pressure

Document No. 129-084

Installation Instructions

September 16, 2015

Page 2 of 3Siemens Industry, Inc.

Installation

Transmitter (input) restrictor

replacement

1. Remove the cover from the receiver-controller.

2. Using a small, flat-blade screwdriver, remove

the two screws on the transmitter restrictor

assembly and lift off the cover. See Figure 1.

Figure 1. RC 195 Receiver-Controller.

3. Remove and replace the input restrictor

(Figure 2) and two gaskets, one above and one

below the restrictor.

Figure 2. Restrictors.

4. After replacing the restrictor cover, tighten the

screws loosely so the restrictor can move.

5. With the lever, move the restrictor several times

to align the gaskets.

6. Move the lever into the correct "In" or "Out"

position.

7. Alternately tighten the two screws. Draw

assembly up snugly but do not overtighten. Over

tightening can squeeze the gasket material into

the restrictor air passage and prevent air from

passing through it.

Pilot relay (supply) restrictor

replacement

1. Using a small, flat-blade screwdriver, remove

the two screws on the pilot relay restrictor

assembly and lift off the cover. See Figure 1.

2. Remove and replace the supply restrictor

(Figure 2) and gasket. Gasket is between the

restrictor and the cover.

3. Alternately tighten the two screws. Draw

assembly up snugly but do not overtighten.

Overtightening will squeeze the gasket material

into the restrictor air passage and prevent air

from passing through it.

Plug-in connector replacement

The transmitter plug-in connector has numbered

ports molded on it.

The supply and control pressure plug-in connector

has the letters "S" and "C" molded on it.

1. Remove the screw from the connector to be

replaced.

2. Remove the connector. Ensure that the

O-rings remain in their position behind the steel

plate.

3. Ensure the diaphragm does not extend into the

hole. If the diaphragm gets caught between the

connector post and the O-ring, the port will leak.

4. Moisten the connector barbs to help them slip

through the O-rings. Carefully press the new

connector into the plug-in opening.

5. Place the screw in the connector and tighten it

securely.

The installation is now complete.

Document No. 129-084

Installation Instructions

September 16, 2015

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and

models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective

Siemens Industry, Inc.

Building Technologies Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

USA

Tel. +1 847-215-1000

Your feedback is important to us. If you have

comments about this document, please send them

to sbt_technical.editor.us.s[email protected]

Document No. 129-084

Printed in the USA

Page 3 of 3

Service

The RC 195 Receiver-Controller requires a clean,

oil-free, dry source of air. In-line filters are

recommended if there is any doubt about the quality

of the air supply, or if you are replacing restrictors

frequently.

References

Operation and adjustment information

RC 195-1 155-036P25

RC 195-4 155-119P25

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