T.a.c. Satchwell climatronic csc5252 User manual

Satchwell Climatronic

CSC5252 & CSC5352 Compensator User’s Guide

SatchwellTM

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possible. Nevertheless, TAC disclaims any warranty of any kind, whether express or implied, as to any

matter whatsoever relating to this manual, including without limitation the merchantability or fitness for

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CONTENTS

1. INTRODUCTION 5

2. INSTALLATION AND COMMISSIONING 6

2.1. LOCATION OF CONTROLLER 6

2.2. WIRING PRECAUTIONS 6

2.3. COMPATIBLE SENSORS 7

2.4. CHANGING SENSORS 7

2.5. USING ADJUSTABLE SPACE TEMPERATURE SENSORS 7

2.6. COMMISSIONING 8

2.7. RELOADING THE DEFAULT VALUES 11

3. APPLICATIONS 12

3.1. COMPENSATED VALVE CONTROL 12

3.1.1. Basic Wiring Diagrams for Compensated Valve Control 13

3.2. COMPENSATED BOILER CONTROL 14

3.2.1. Basic Wiring Diagram for Compensated Boiler Control 15

3.3. DISTRICT HEATING SYSTEMS 16

3.3.1. Basic Wiring Diagram for District Heating Applications 18

3.4. ACTUATOR OVERRIDE FOR MAINS OUTPUT APPLICATIONS 19

3.5. ACTUATOR OVERRIDE FOR 24VAC OUTPUT APPLICATIONS 19

4. FACIA AND DISPLAY 20

4.1. MANUAL OVERRIDE SWITCH 21

4.2. CONTROLLER MODES 22

4.2.1. Review Mode 22

4.2.2. Quick Set Mode 22

4.2.3. Fine Tune Mode 22

4.2.4. Setting the Time Schedule (CSC 5352 Only) 22

4.3. FACIA PRINTING, REVIEW AND QUICK SET MODE 23

4.3.1. Review Mode 23

4.3.2. Setting the Default Display for Review Mode 23

4.4. ACCESSING AND EXITING QUICK SET MODE 24

4.4.1. How to Set Values 25

4.4.2. To Select the Economy Mode (CSC 5352 Only) 26

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4.5. OVERLAY CARD PRINTING, FINE TUNE MODE ONLY 26

4.5.1. Entering and Exiting the Fine Tune Mode 27

4.5.2. To Adjust the Economy Mode (CSC 5352 Only) 30

5. SPECIFICATION 31

5.1. CHANGING THE BATTERY 32

6. FREQUENTLY USED FUNCTIONS AND USER SETTING

RECORD TABLES 32

6.1. MANUAL OVERRIDES 32

6.2. REVIEW MODE 33

6.3 HOW TO ENTER QUICK SET MODE 33

6.3.1. Economy Mode (CSC 5352 Only) 35

6.4. ENTERING AND EXITING THE FINE TUNE MODE 35

6.5. TIME SCHEDULE 40

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1. INTRODUCTION

The CSC controller is designed to be simple to install and easy to use. The

controller is used in simple plants typically in schools, libraries and large domestic

installations. It may be installed either within a control panel or can be wall mounted.

The user can recall, display and adjust parameters quickly and easily, prompted by

the controller display. The facia has clearly labelled push-buttons for use when

setting the controller. There is an overlay card which must be placed over the

controller display for use in the Fine Tune Mode. A rotary selector switch is provided

to enable overrides to be quickly and easily applied.

The CSC controls the temperature of air in ducts or water flowing to radiators

throughout the building or zone. Each independent zone will need its own CSC

controller and associated equipment.

A 3 way mixing valve is normally used to control the water temperature by mixing the

cooler return water with the hot water from the heat source. Because boilers are

used to supply heat to the domestic hot water as well as heating radiators the CSC

must be used with a mixing valve. Where the heating system is independent the

boiler may be directly controlled by turning it on and off to control the output or flow

temperature.

The temperature of the flow water is monitored to ensure that desired value is

maintained to maximise energy savings. The hot water can be supplied by a boiler

or non-storage calorifier on a district heating system. The set point of the flow water

is determined mainly by the outside air temperature. As the outside air temperature

decreases the radiator water temperature is increased to compensate for heat loss.

This is the basic principal of how a compensator works. A space temperature

sensor can be connected to influence the flow temperature if required. The space

sensor allows the set point of the flow water to be increased or reduced as the space

temperature changes.

The CSC can only control one item of plant (either a valve or a boiler).

The CSC is shipped with standard (defaults) values for parameters. These default

settings are used so that in most cases only a minimal number of parameters need

to be amended to get the best out of the controller. It is important, however, that you

tune the CSC to your control system to get the best out of it. Typical default values

that should be checked/set are:-

•Current time and Time-schedule (CSC 5352 only).

•Valve/Boiler application selection.

•Room Influence Operation.

•Night Set Back Operation (CSC 5352 only).

•Frost Logic and Set Point (CSC 5352 only).

•Pump Exercise (CSC 5352 only).

•Pump Overrun (CSC 5352 only).

•Controller tuning.

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2. INSTALLATION AND COMMISSIONING

The CSC should be installed and commissioned by a competent technician.

DO NOT SWITCH ON THE POWER SUPPLY UNTIL THE COMMISSIONING

PROCEDURES HAVE BEEN COMPLETED.

2.1. LOCATION OF CONTROLLER

The controller must be installed in a position which is fairly clean and free from damp

and condensation.

Temperature and humidity limits must be obeyed.

Ambient Operating Temperature: 0°C to 50°C

Operating Humidity: 0 to 95% RH non condensing

A minimum of 150 mm clearance is required around the controller to allow access

for mounting, wiring, servicing and to avoid electrical interference from other devices

such as contactors.

2.2. WIRING PRECAUTIONS

•On new installations all sensor cables must be screened with the screens

connected separately to the 0V earth point provided. An MICC earth plate is

provided for use if MICC cable is used.

•When upgrading a CSC or CXC installation it is usually possible to use the

existing unscreened sensor wiring as long as the cable run is less than 100

metres and is sited more than 75mm from mains wiring runs.

•The mains supply, 24Vac output, relay and triac output wiring must be run

separately from all the controller sensor and override inputs.

•The controller must be located as far away as possible (minimum 150mm) from

any contactors or switches and their cables. This is to avoid any interference to

the controller.

•No connections to the controller should be made whilst power is applied.

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2.3. COMPATIBLE SENSORS

There are a large number of sensors that are compatible with the CSC.

It is not possible to mix old generation and ‘T’ type sensors on the CSC.

The compatible sensors are listed below along with their resistance type number’s.

The first time the CSC is powered up it will automatically configure itself to the

sensor type connected (“old generation” or “T Type”).

2.4. CHANGING SENSORS

If a CSC connected to old generation sensors is subsequently equipped with a set of

“T Type” sensors it is necessary to manually select the sensor type as 5 (T Type).

Remember that you cannot mix “T Type” and old generation sensors on the same

CSC. “T Type” sensors should be used on all new installations.

2.5. USING ADJUSTABLE SPACE TEMPERATURE SENSORS

Adjustable room sensors do not change the CSC controllers programmed set point,

they fool the controller into believing that the space temp is above or below the ideal

space temperature. The CSC is primarily a water temperature controller and the

space sensor only provides an influence over the flow temperature as a way to

modify the actual space temperature. Where these sensors are used the controller

may be forced into a Frost condition is adjustment is to great, e.g. asking for 30°C in

the space the controller may think its 10°C or less. For this reason it is

recommended that the low limit space setting is reduced to its minimum when using

adjustable sensors to avoid confusion. Non adjustable space sensors will allow

automatic frost protection to take place.

"T TYPE" SENSORS

Sensor Sensor Type Resistance Type Temperature

Range

DRT 3451, 3453 Room 5 –5 to +40°C

DWT 1701, 1702 Water 5 –10 to +120°C

DST 1601, 1603 Water (strap on) 5 +5 to +120°C

DOT 2301 Outside 5 –40 to +40°C

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2.6. COMMISSIONING

ENSURE THE MAINS POWER SUPPLY IS OFF AND THAT ANY OTHER POWER

SUPPLIES TO AND FROM THE CSC ARE ISOLATED.

1. Undo the central case fixing screw and separate the case to gain access to the

terminals.

2. Check that all wiring is correctly connected to the terminals. This should be

done using the connection or application diagram for reference.

3. The battery supplied should now be fitted.

4. Reassemble the controller case and securely tighten the central fixing screw.

5. Apply mains power to the controller, the display will show “reset” followed by the

controller firmware number:

6. The controller will then go into review mode.

7. Set the real time clock. (See the Quick Set mode for details on setting the clock).

8. Complete the configuration via the Quick-Set and Fine-Tune parameters.

Which Parameters to Change

The CSC is programmed with typical defaults to suit most applications. These

should always be checked to maximise energy savings and comfort. Depending on

the model being used the following table show which parameters are most likely to

be in need of adjustment to allow correct and safe operation.

CSC

5352

CSC

5252

Why Do You Need to Alter?

Quick

Set

Mode

Time & Day üTo enable correct plant time

switching.

Low Outside

Temperature

üTo protect the plant from low

outside temperatures if required.

Flow High

Limit

üThis setting sets the highest

possible flow temperature that the

CSC will allow. Must be used in

sensitive applications such as

under floor heating.

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CSC

5352

CSC

5252

Why Do You Need to Alter?

Fine

Tune

Mode

IA Integral

Action

üüAllows the CSC to react to

temperature deviations.

PB Proportional

Band

üAllows the CSC to position the

value according to the error.

NSB Action üDo you want heating during the

relaxed periods:

0 = (No Heating)

1 = (Yes both periods)

2 = (Yes to 1st Off period, No to

2nd Off period)

INF Room

Influence

Mode

üHow do you want the Space

Temperature to influence the Flow

Temperature.

Frost Logic üDo you want to use UK or

European Frost Logic.

Valve or

Boiler

üAre you controlling a valve or boiler.

SVd Set Value

Day Origin

üIf you have a Space Sensor what

will be your target Space

temperature for the Day Period.

SVn Set Value

Night Origin

üIf you have a Space Sensor what

will be your target Space

temperature for the Night Period.

Low Space

Temperature

üIf you have a non-adjustable Space

Sensor what is the lowest

permissible Space Temperature.

Stroke Actuator

Stroke

üHow long does the actuator take to

run from fully closed to fully open in

seconds.

OTHER SETTINGS - CSC 5352

Set the time schedule to complete the basic commissioning procedure.

NOTE:

If you have set the above they should not need further adjustment given your

application. Always check periodically as a part of ongoing maintenance program.

Ratios and ECO functionality must be set to maximise energy savings.

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2.7. ADDITIONAL CONTROL LOGIC INFORMATION

Room Influence Operation.

If a room sensor is used you can choose how it influences the flow temperature. If

you select 0 there is no influence. If you select 1 then room influence will adjust the

flow temp up and down during the day but only down during the off periods. If you

select 2 the flow temp is only influenced to lower the set point during both day and

night periods. The fixed ratio is 3:1, both day and night have set points for space

temperature.

Night Set Back Operation (CSC 5352 Only).

When the CSC turns off you can select what happens to the heating. If you set to “0”

the heating will turn off during both “off” periods. This means that there will be no

heating during the relaxed periods, the pump will turn off and the valve, if used, will

close. If you set the value to “1” this means that the heating will run during both off

periods with the flow temp reduced by the setting. If the setting = 2 then the

heating will control to NSB during the 1st off period but turn off for the 2nd off period.

The controller can be externally overridden to Night Set Back by the use of an

external contact if required.

•Frost Logic and Set Point (CSC 5352 Only).

The CSC has three stages of frost. Stage 1 is outside air temperature. This value is

adjustable by you. The CSC is constantly monitoring the outside air temp and if it

falls below the limit when the heating is off then the CSC will a) turn the pump on

(UK Logic) b) turn on the pump and control to the NSB requirement. During the

event of frost out of hours the controller will display “Auto 1” to indicate that the

controller is working correctly.

Low Flow Temperature (Stage Two Frost)

If the flow water temperature falls below 5°C then the valve will open and the boiler

and pump will start. The plant will remain in Boost control for a 1⁄2hour period. This

should ensure a sufficient rise in return water temperature and remove the frost

condition. In the event of another frost condition the control will cycle as stated. The

controller will display “Auto 2” during this frost period.

Low Space Temperature (Stage Three Frost)

If a space temperature sensor is fitted then this will also provide the third stage frost

protection in addition to room influence. The low space temp setting will open the

valve and energise the pump until the space temperature has increased above the in

built hysteresis of 2°C (not adjustable) under boost conditions. The default low space

temperature setting is set to 10°C and this will be adjustable (–10 to 30°C). Whilst in

this condition display will show “Auto 3”. An example of this occurrence could be a

window being broken/left open in the area being controlled. As the space

temperature can increase the flow temperature during the day this alarm should only

occur when the plant is off or in the NSB mode. The low space temperature setting

can be adjusted to –10 to remove the function if required. This will allow the input to

be used for other influence applications if required.

Pump overrun will be in operation for the programmed period after any of the frost

conditions have cleared.

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The CSC 5252 does not include any frost protection as the controller does not

directly control the pump. Frost protection must be provided by external controls

such as thermostats and interlocked accordingly to the plant and actuator.

•Pump Exercise (CSC 5352 Only)

If the plant has not been used for any 7 day period then the plant will be exercised to

prevent pump and valve seizure. This period setting is not adjustable but can be

turned off by putting the controller into the off condition or any other manual position

by using the rotary knob. Exercise will only take place when the controller is in the

Auto or Standby condition.

•Pump Overrun (CSC 5352 Only)

Used to dissipate residual heat in the non-storage calorifier or directly controlled

boiler after firing. The pump run on time is adjustable to suit plant types and needs to

be set to avoid nuisance high limit tripping.

•Controller Tuning

Adjust the Proportional Band and Integral Action to ensure the most accurate and

efficient response. Check control loop stability at frequent intervals as a part of an on

going maintenance program. This will ensure maximum energy savings and

component life.

•Flow High Limit

Depending on your application it may be necessary to limit the maximum water

temperature that the CSC will provide to the heat emitting elements. This feature

should be employed on non-storage calorifier applications and under floor heating

applications.

2.8. RELOADING THE DEFAULT VALUES

This procedure only needs to be carried out if you need to reload the controller

default values. The controller will also automatically configure itself to the sensors

connected to it.

The following procedure will reload the CSC default values.

THIS WILL DELETE ALL YOUR EXISTING USER SETTINGS.

1. Switch OFF the power.

2. Press and hold the “Enter” key. Switch the power ON.

3. The controller display will show “reset” followed by the firmware number.

4. The controller will now display “dflts”. Release the “Enter” key.

5. The controller display will show “reset” again followed by the firmware number.

6. The controller will then go into review mode.

7. Enter your new Parameters and update your setting record sheet in the back of

this guide.

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3. APPLICATIONS

3.1. COMPENSATED VALVE CONTROL

This compensator application operates a 3 port mixing valve to control the flow

temperature of the system based on the outside temperature. A room sensor is

optional and is used to trim the flow temperature and not to control it. The way room

influence works can be selected to suit your needs. It need not be used. The flow

temperature can be adjusted by 3ºC for every 1ºC the room temperature is above or

below the daytime space temp set value (SVd).

If the CSC 5352 is used then the clock determines whether the compensator

operates in day or Night Set-Back (NSB) mode. The CSC can be set to allow the

heating i.e. pump, valve etc. to run at reduced set points or turn off during the off

periods. When in NSB mode the action of Room Influence is adjusted to work only in

a negative fashion as to reduce the flow temperature. The flow temperature will be

lowered by 3°C for every 1°C the room temp is above the relaxed set point (SVn).

The compensator has 2 compensation ratios and a high limit function to prevent

excessive set points occurring.

Out of hours, If the outside temperature drops below an adjustable frost setting,

defaulted to 0°C, the pump is enabled and “Auto 1” is displayed on the controller.

The CSC will resume normal operation when the outside temperature increases by

2°C. If a space sensor is used then this will also provide frost protection to protect

the building fabric. The low space temperature is adjustable but is normally set to

10°C. If this limit is passed then the heating will come on in boost to ensure the

fastest possible relief. “Auto 3” will be displayed on the CSC during this period. The

frost condition will be removed when the space temperature has risen by 2°C. If for

any reason, the flow temperature should fall below 5°C the CSC will act to remove

the possibility of frost. The controller will start the pump and open the valve to raise

the water temperature of the system, the CSC will remain in this condition for 30

minutes. When this event occurs during a standby period if not day or NSB, the

CSC will display "Auto 2" for the period. If your CSC doesn’t have a time clock, then

Frost Protection is not included as the controller does not control the pump. All Frost

Protection must be provided by other interlocked devices such as thermostats.

If under floor heating is used, please remember to check the high limit setting so as

not to allow excessive flow temperatures.

Pump

Time switch

version only

(Optional)

(Flow

Temp)

Boiler

Fig.1

* A control and safety high limit thermostat

must be used on the boiler

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3.1.1. Basic Wiring Diagrams for Compensated Valve Control

Ensure that 34 is

always hard wired to

35, for all 24Vac

actuators only

Links 7-8 and/or 9-10 must

be removed if Set-up

and/or Night Set Back is

used.

Set-Up/Boost

Night Set-Back

Pump

Time-switch

version only

230Vac Actuator

ARM Mk 2 Actuator

1 = Red

2 = Blue

3 = Black

Links 7-8 and/or 9-10 must

be removed if Set-up

and/or Night Set Back is

used.

Set-Up/Boost

Night Set-Back

Pump

Time-switch

version only

24Vac Actuator

Fig.2

Fig.3

ARX Mk 2 Actuator

1 = Red

2 = Blue

3 = Black

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3.2. COMPENSATED BOILER CONTROL

This compensator application switches the boiler to control the flow temperature of

the system based on the outside temperature. A room sensor is optional and is used

to trim the flow temperature and not to control it. The way room influence works can

be selected to suit your needs. It need not be used. The flow temperature can be

adjusted by 3ºC for every 1ºC the room temperature is above or below the daytime

space temp set value (SVd).

If the CSC 5352 is used then the clock determines whether the compensator

operates in day or Night Set-Back (NSB) mode. The CSC can be set to allow the

heating i.e. pump, valve etc., to run at reduced set points or turn off during the off