t.a.c. TAC 200 User manual

TAC 200
User’s Manual
0-004-6921-0(GB),2000-02-09

TAC AB, Feb 2000
Contents
TAC 200 User’s Manual
TAC 200
User’s Manual
Thisdocumentcontainsproprietary informationof TACand ismade availablesolely tothose whooperate andmaintain TACequipment.
Disclosure,reproduction or useof eitherthe documents orthe informationcontained herein forany otherpurpose is strictlyprohibited.
TA reserves the right to make changes or additions to material as necessary.
©1993TAC AB
Contents
1 Introduction
1.1 The TAC 200 Heating Controller ...........................................................................................1:1
1.2 This manual ...............................................................................................................................1:1
1.3 More information .....................................................................................................................1:2
2 General
2.1 Mounting ..................................................................................................................................2:1
2.2 Connections ..............................................................................................................................2:3
2.3 The Operator Panel ..................................................................................................................2:5
2.4 Commissioning .........................................................................................................................2:7
3 Dailyoperations,P:00-P:15
3.1 List of available functions .........................................................................................................3:1
3.2 Description ...............................................................................................................................3:2
4 Special functions, P:16 -
4.1 List of available functions .........................................................................................................4:1
4.2 Reset .........................................................................................................................................4:2
4.3 Control functions ......................................................................................................................4:3
4.4 The Control Curve ...................................................................................................................4:4
4.5 Power limit function ..................................................................................................................4:6
4.5.1 Measuring the power ...................................................................................................................................... 4:6
4.5.2 Limiting the power .......................................................................................................................................... 4:7
4.6 Room temperature control ......................................................................................................4:7
4.7 Night setback and Morning boost ...........................................................................................4:9
4.8 Extended day/night operation ............................................................................................... 4:10
4.9 Time control of external units ............................................................................................... 4:11
4.10 Pump control .......................................................................................................................... 4:11
4.11 Time functions ....................................................................................................................... 4:12
4.12 Test functions ........................................................................................................................ 4:13

TACAB, Feb 2000
Contents
TAC 200 User’s Manual
5 Technicaldata
5.1 Electrical ...................................................................................................................................5:1
5.2 Mechanical ................................................................................................................................ 5:2
5.3 Default values ...........................................................................................................................5:2
5.4 Part numbers ............................................................................................................................5:4
TAC200 Commissioning protocol
Reply form
This manual contains in all 21 leaves.

TAC AB, Feb 2000 1:1
Introduction
TAC 200 User’s Manual
1 Introduction
1.1 TheTAC 200 Heating Controller
The TAC 200 is a controller for different heating systems.
TAC 200 may be operated with or without a room sensor.
It also compensates for the outdoor temperature in different ways.
The controller has an easy-to-use operator interface and needs virtually
no maintenance.
1.2 This manual
This manual has the following contents.
Chapter 2
Shows how the TAC 200 is mounted, connected and commissioned.
There is also a description of the operator interface with its symbols. To
show the usage of the operating keys, there is a detailed description on
how to set the date and time.
After the time has been set, the TAC 200 immediately starts working with
default values.
Chapter 3
This chapter describes the daily operations on the TAC 200. You can
read temperature values, enter setpoint values and change the time
programs for day and night time operation.
Chapter 4
When a plant is commissioned and fine-tuned, it may be necessary to
adjust some of the parameters. The controller function and available
parameters are described in chapter 4.
Chapter 5
This is a summary of the technical data of the TAC 200. There is also a
list of all the default values used at a restart.
At the end of the manual there is a commissioning protocol, where
entered values should be noted.

1:2
Introduction
TAC 200 User’s Manual
TAC AB, Feb 2000
1.3 More information
TAC 200 is also described in the following documents, available in
Swedish, English and several other languages:
•Data sheet TAC 200
The data sheet contains a comprehensive specification of the controller
and should be read together with the User’s Manual.
•List of functions in TAC 200
A small leaflet normally placed in a slot in the operator’s panel.
•Installation instruction TAC 200
0FL-3492-002 is a description for installation and start-up, packed
together with the unit. The contents are a condensed version of chapter 2
in this manual and a graphic mounting instruction.

TAC AB, Feb 2000 2:1
General
TAC 200 User’s Manual
2 General
2.1 Mounting
Type TAC 200 controller
The TAC 200 has a plastic enclosure with a transparent cover. Install the
controllerinaccordancewiththeenclosedinstructions.Placethecontrollerso
that you can easily adjust and read the display.
Cable entries for cables from sensors and actuators are provided for in the
mountingandterminalplate.
Type EGU outdoor sensor
Mount the sensor on an external wall facing north or northwest. The sensor
should be located about 3 m above the ground and the cable entry should be
orienteddownwards.
Type EGWS/EGA water temperature sensors
Install the EGWS pipe sensor in the riser pipe 0.5-1 m downstream of the
shunt valve. If a clamp-on sensor is fitted, mount this on an uninsulated part of
the riser pipe. Carefully rub down the pipe so that the copper plate of the
sensor will make good contact.

TAC AB, Feb 2000
2:2
General
TAC 200 User’s Manual
Type EGF 1 or EGRL room temperature sensors
To ensure the best possible results, observe the following when installing the
roomtemperaturesensor.
Thesensor mustbelocated ina roomwhichis typicalforthe building.
Theroommustbesufficientlylargesothatnowidetemperaturevariationswill
occur due to local heat sources, such as machines or occupants.
Theroom mustnot beequipped withthermostatic valves.
Locate the room sensor so that its time constant will be as short as possible. To
achievethis:
–Mount the sensor on an inner wall made of lightweight building material,
such as wood or plasterboard. Avoid mounting it on a concrete wall.
–Mount the sensor in an open location to ensure good circulation of air
aroundit.
–Locate the sensor within 10 m from a radiator, but not directly above a
radiator.Thisisparticularlyimportantinroomswithoutmechanical
ventilation.Theairvelocitiesarethenoftenlow,whichwillcauseasluggish
responseof thecontrol system.
Type M44, M5, M15, M42 actuators
Installation instructions for actuators are supplied together with the actuator
and its its installation kit.

TAC AB, Feb 2000 2:3
General
TAC 200 User’s Manual
Wiring diagram for mixing valve
Connection to a system with a 230 V actuator.
2.2 Connections
Supply temp. sensor
Room sensor
M 10
B1 11
B2 12
B3 13
M 14
X1 15
X2 16
X3 17
M 18
Outdoor sensor
Forced day op.
Forced night op.
Pulse counter
1 L
2 N
3 PE
4 KC1
5 K1
6 K2
7 KC2
8 K3
9 K4
Pump
Other
R
B
W
M15/
M44
(230V)
230 V L
230 V N
Connection to a system with a 24 V actuator.
Supply temp. sensor
Room sensor
M 10
B1 11
B2 12
B3 13
M 14
X1 15
X2 16
X3 17
M 18
Outdoor sensor
Forced day op.
Forced night op.
Pulse counter
1 L
2 N
3 PE
4 KC1
5 K1
6 K2
7 KC2
8 K3
9 K4
Pump
Other
R
B
W
(24 V)
230 V L
230 V N
~
24 V
Supply temp. sensor
Room sensor
M 10
B1 11
B2 12
B3 13
M 14
X1 15
X2 16
X3 17
M 18
Outdoor sensor
Forced day op.
Forced night op.
Pulse counter
1 L
2 N
3 PE
4 KC1
5 K1
6 K2
7 KC2
8 K3
9 K4
Pump
Other
230 V L
230 V N
Stage
2
Stage
1
Wiring diagram for on/off control
Connection to a system with an on/off control.

TAC AB, Feb 2000
2:4
General
TAC 200 User’s Manual
There are two types of on/off control (selected by the DIP-switch settings, see
2.4).
On/off in two steps: Step 1 Step 2
Stage 1 ••
Stage 2 •
On/off in three steps: Step 1 Step 2 Step 3
Stage 1 ••
Stage 2 ••
Connections on the terminal unit.
TAC 200 has six knock-out holes for cable entries:
–2 knock-outs in the rear part for conduit fitting Pr 18.6 (Pg 11)
–2 knock-outs (for cables with rubber bushings) on the upper side of
the case
–2 knock-outs (for cables with rubber bushings) on the lower side of
the case
High voltage cables must be kept well separated from the low voltage
cables.
Connections (also any connections of 24 V to the actuators) must be
performed according to the high voltage regulations.
1 230 V/L Supply voltage, live
2 230V/N Supply voltage, neutral
3 PE Protective earth
4 KC1 Voltage supply, relay K1 and K2
5 K1 Relay K1: increase / stage 1
6 K2 Relay K2: decrease / stage 2
7 KC2 Voltage supply, relay K3 and K4
8 K3 Relay K3: pump
9 K4 Relay K4: universal, time program 2, output
10 M Signalearth(Measuringground)
11 B1 Supplytemperaturesensor,EGWS/EGA
12 B2 Outdoorsensor,EGU
13 B3 Room sensor EGRL or EGF1
(wire 1 or 2; the other, 2 or 1, to M)
14 M Signalearth
15 X1 Forced day time operation (short-circuited to M)
16 X2 Forced night time operation (short-circuited to M)
17 X3 Digital input, pulse counter
18 M Signalearth
Cable length
Up to 200 m, area 0.5 mm2to B1-B3 and X1-X3.
Up to 100 m, area 1.5 mm2to other terminals.

TAC AB, Feb 2000 2:5
General
TAC 200 User’s Manual
TAC 200 List of functions and example on the use of the operating keys.
2.3 The Operator Panel
The Operator panel consists of a semi-graphic display, a leaflet with the
functions and the following operating keys
P
–upward in list (in the text also called Pup)
P
–downward in list (in the text also called pdown)
+
–increasevalue
–
–decreasevalue
0/ l
–toggle switch for the 30 minutes segments
TAC 200 Operator panel.
The keys Pup and Pdown are used to move up or down in the list of func-
tions, and the keys +and –(and in some cases 0/I) are used to change the
value of the selected item.
P:00 12:34
0/ l
–
P
+
P
Display. Normally showing
P:00 followed by the time.
Operating keys
List of
functions
DIP-switch
location
P:05 20.0 °C
–
P
+
P
Operating keys
List of functions
Display
P:
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Function
Time / Mode
Room temperature
Outdoor temprature
Supply temperature
Calc. supply temp. SP
SetPoint room, day
SetPoint room, night
Night setback SP (°C)
Curve parallel adjustm.
Time pr 1, day-by-day
Time pr 1, 1-7 days
Time pr 2, day-by-day
Time pr 2, 1-7 days
Clock hh:mm
Month.day
Year
20.1
19.9

TAC AB, Feb 2000
2:6
General
TAC 200 User’s Manual
If you keep pressing the + or –key, the value will change more rapidly in
several levels.
If no key has been touched for about two minutes, the display will always
revert to P:00, current time / operating mode.
Some of the values are display-only, for example P:02, the outdoor
temperature. These P: selections are written in italics in the leaflet, to
indicate that the displayed values cannot be changed by the operator.
Depending on the configuration of the system (section 2.4), i e what kind
of units are connected, some of the P: functions may be omitted on the
display.
The TAC 200 panel display has a number of letters and symbols which
are used to indicate status or assist in the input.
A lighted symbol has the following meaning.
Pump is active.
Time program 2 indicates ON.
Operation mode Forced Off: see section 3.2.
Operation mode Forced Night time / flashing if forced externally.
Operation mode Automatic: –Time program 1 is in control.
Operation mode Forced Day time / flashing if forced externally
On/off control: Stage 1, Stage 2 connected.
Mixingvalve: Closing,Opening.
Flashing when power limiting is active.
K4
I II
!
TAC 200 Operator panel.
12:34
MO TU WE TH FR SA SU
0
1
2
3
4
5
7
6
89
10 11 12 13 14 15 16 17
18
19
20
21
22
23
24
K4
!°C
AM
P:00
Ι ΙΙ
Selected P-function Corresponding value
These symbols are
described in the text
below
30 mins. segment used with
time program 1 and 2.
Filled segment indicates
Day time operation
Week-days used with time
program 1 and 2.
Selected days are shown.
AM/PM and °C only
appear when 12h-clock
or temperature is
displayed.

TAC AB, Feb 2000 2:7
General
TAC 200 User’s Manual
2.4 Commissioning
When the installation and the electric wiring have been completed, carry out
the following checks and adjustments before taking the system into operation.
1. Check that the sensors and actuators have been correctly connected.
2. Locate the DIP-switches on the front panel, under the List of
functions and set the switches as follows.
Switch Position off (0) Position on (1)
1 on/offcontrol mixingvalve
2 on/off: 2 steps on/off 3 steps
3 radiatorheating floorheating
4 no room sensor roomsensor
5 roomsensor EGRL room sensor EGF 1
(with SP dial)
6-7 (no significance; set to 0)
8 hardware reset and restart when switched from normal
position 0 to 1 and back.
Ifswitch1issetto1(mixingvalve),switch2willhavenosignificance.
If switch 4 is set to 0 (no sensor), switch 5 will have no significance.
Ifrestart isneededwith switch8the controllerwillnot loseanyset values.
Hardware reset
3. Connect the power supply.
12345678
on
off
Dip-switches, underneath the list of functions
Factory settings 1-8: 1000 0000.

TAC AB, Feb 2000
2:8
General
TAC 200 User’s Manual
4. Set the time and date:
Press
P
till you get P:13 Clock hh:mm
Press
–
or
+
till you get the correct time.
(example)
(If you keep pressing the + or –key, the value will change more rapidly.)
Press
P
to get P:14 Month.day.
Press
–
or
+
till you get the correct date.
(example)
Press
P
to get P:15 Year.
Press
–
or
+
till you get the correct year.
(example)
Important Press
P
or
P
to execute the change.
(If, by mistake, you happen to change a value and have forgotten the
old value, no change will be made as long as no P-key has been
pressed. In stead, wait for P:00 to re-appear, in about 2 minutes.)
5. TAC 200 is now running in auto mode, with default (factory) values.
See section 5.3. Day time operation will rule 06:00 to 22:00, Monday
through Sunday.
6. If other values are required, see chapters 3 and 4.
P:13 00:00
P:13 09:45
P:14 01.01
P:14 01.29
P:15 1993
P:15 1994

TAC AB, Feb 2000 3:1
Daily operations, P:00 - P:15
TAC 200 User’s Manual
3 Daily operations, P:00 - P:15
3.1 List of available functions
The following functions are reached with the keys Pup and Pdown and the
correspondingvaluesaredisplayed.
Values described withitalics are display-only and cannot be changed. All
other values may be changed with the keys + and –.
P:00 Time / Mode
P:01 Roomtemperature
P:02 Outdoortemperature
P:03 Supplytemperature
P:04 Calculated supply temperature setpoint (SP)
P:05 SetPoint room, day
P:06 SetPoint room, night
P:07 Night setback SP (°C)
P:08 Curveparalleladjustment
P:09 Time program 1, day-by-day
P:10 Time program 1, 1-7 days
P:11 Time program 2, day-by-day
P:12 Time program 2, 1-7 days
P:13 Clockhh:mm
P:14 Month.day
P:15 Year
The operating procedures are described in section 2.3.

3:2
Daily operations, P:00 - P:15
TAC 200 User’s Manual
TAC AB, Feb 2000
3.2 Description
P:00 Time / Mode
P:00 is the normal display mode and shows the current time.
In this case the + and –keys are used to shift between the different
operating modes. The modes are indicated on the display. The pump
freezeprotectionisactiveinalloperationmodes(alsoinForced Off).
Forced Off: –SP for supply temp. is set to 10°C.
Forced Night time operation.
Automatic mode, time program 1 is in control.
Forced Day time operation
If Day or Night time operation has been forced from an external device
(seeExtendeddaytimeoperation,section4.8),thecorresponding
symbolwillflash.
Externallyforcedoperation(X1,X2)hasahigherprioritythanany
locallyforcedoperation.
P:01 Room temperature (if there is a room sensor)
P:02 Outdoor temperature
P:03 Supply temperature
Theselectedtemperature is shownin°C.Thedisplayiscontinuously
updated, but after about 2 minutes, the display will revert to P:00 to
show the time.
P:04 Calculated supply temperature setpoint
The setpoint for the supply water is calculated by the controller. The
current value, in °C, is shown here.
The value cannot be changed from the display.
P:05 Setpoint room, day
P:06 Setpoint room, night
These entries are used to set the desired temperature value, when the
room sensor has no setpoint dial (i e type EGRL). Please refer to
section 4.7 for details on P:06 (and P:07).
P:07 Night setback SP
The night setback is used for the night SP if there is no room sensor at
all, or when the room sensorhasa setpoint dial (i e type EGF 1; the dial
is normally used for the day SP).
Anegativevaluewillleadtoareductioninthetemperature.
P:08 Curve parallel adjustment
The temperature curve can be adjusted upwards or downwards by the
amountof degreesgiven.This isnormallyused onlywhenthere isno
roomsensor.
For most P: -values, for example P:00 - P:08, the current day is shown
on the display, as is time program 1 on the 0-24 scale.

TAC AB, Feb 2000 3:3
Daily operations, P:00 - P:15
TAC 200 User’s Manual
Setting a time program day-by-day.
P:09 Time program 1, day-by-day
P:10 Time program 1, 1-7 days
P:11 Time program 2, day-by-day
P:12 Time program 2, 1-7 days
The digital clock has two time programs, TP 1 and TP 2.
TP 1 is used to switch between Day and Night time operation. TP 2
may be used for any suitable purpose.
Both can be individually set for each of the days in the week with a
precisionof30minutes.Bypickingsuitableon/offtimes,operationwill
alwaysoccurwithin15minutes of anydesired timevalue.
TP 1 is set by using either P:09 or P:10.
TP 2 is set by using either P:11 or P:12.
To set a time program, day-by-day:
1. Select P:09 (TP 1) orP:11 (TP 2).
2. Usethe toggle-key(0/ l)to
–fillthesegmentforActiveoutput
–clearthe segmentforPassive output
Theflashingsegmentwillalsomovetothenextposition.
3. Move the flashing segment with the + or –keys, if necessary.
4. Thedayisautomaticallyswitchedwhenyou leave thelast segment
(or the first, backwards).
5. Enter the segments for all the days of the week.
Important! 6. To execute the changes, you mustpress either Pup or Pdown when
youare finished!
MO
0
1
2
3
4
5
7
6
89
10 11 12 13 14 15 16 17
18
19
20
21
22
23
24
P:09
Flashing segment:
Toggle indication with 0/I key.
A filled segment indicates Active
operation.
Day the entry is valid for.
Move flashing
segment with
key + or –.
If you press + when the
segment is here, the
entry will switch to the
next day.

3:4
Daily operations, P:00 - P:15
TAC 200 User’s Manual
TAC AB, Feb 2000
If several days shall have the same pattern you may simplify the entry by using
the following method.
Note! This method requires some planning, as several days may be affected at the
same time and as their current values are not displayed before the change. If
segments under P:10 or P:12 have been changed, but you regret the changes
and do not want to execute them, you must blank outall the days displayed,
see step 2 below.
To set a time program, 1-7 days:
1. SelectP:10 (TP 1) orP:12 (TP 2).
2. Use the toggle-key (0 / l) and the + or –keys to set the days that shall have
the new pattern, for example, Monday to Friday (no days shown –› no
change).
3. The flashing segment is automatically switched to the 30-minutes seg-
ments when you leave the ’Sunday’(or the ’Monday’, backwards).
4. Move the flashing segment with the + or –keys and use the toggle-key(0 / l)
to
- fill the segment for Active output
- clear the segment for Passive output
for all the days that were marked in step 2.
Important! 5. To execute the changes, you press either Pup or Pdown !
6. Now return to P:10 or P:12 if you want to affect the other days, for exam-
ple Saturday to Sunday.
7. Specify the active segments for these days as in steps 2-5.
P:13 Clock hh:mm
P:14 Month.day
P:15 Year
How to set time and date is shown in section 2.4.
Setting a time program 1-7 days.
MO TU WE TH FR SA SU
0
1
2
3
4
5
7
6
89
10 11 12 13 14 15 16 17
18
19
20
21
22
23
24
P:12
A filled segment
indicates Active
operation.
Move flashing
segment with
key + or –.
If you press + when the
flashing segment is
here, the entry will
switch to the 30-mins.
segments.
Flashing day name:
Toggle indication with 0/I key.
Visible days indicate days the
30-mins. segment are valid for.

TAC AB, Feb 2000 4:1
Specialfunctions, P:16-
TAC 200 User’s Manual
4 Special functions, P:16 -
4.1 List of available functions
The following functions are normally only used during commissioning or if
specialadjustments arerequired.
Values described withitalicsare display-only and cannot be changed. All
other values may be changed with the keys + and –.
To reach the functions beyond P:15, you must do as follows:
Press
P
and
P
at the same time.
P:16 Maxsupplytemperature
P:17 Minsupplytemperature
P:18 Curve point x(1)
P:19 Curve point y(0)
P:20 Curve point y(1)
P:21 Curve point y(2)
P:22 Wh / pulse
P:23 Pulses / kWh
P:24 SP max-powerkW
P:25 Current power kW
P:26 Power limit control interval (minutes)
P:27 Powerlimit gain(°C/kW)
P:28 Powerlimit I-time(minutes)
P:29 Roomsensorauthority
P:30 RoomI-time(minutes)
P:31 Roomdeadzone (°C)
P:32 Max. room influence, day
P:33 Max. room influence, night
P:34 Supply P-band (°C)
P:35 SupplyI-time(minutes)
P:36 Actuatorstroke time(seconds)
P:37 °C x min On/Off next stage
P:38 Outdoor temperature 100% nightsetback
P:39 Outdoortemperature 0%nightsetback
P:40 Boosttime(minutes)
P:41 Max-boost(°C)
P:42 Pump cut-off (=1)
P:43 Pump exercise (=1)
P:44 Outdoor temperature for pump stop (°C)

TAC AB, Feb 2000
4:2
Specialfunctions, P:16-
TAC 200 User’s Manual
P:45 Supply temperature for pump start
P:46 Min off time pump (hours)
P:47 Timeformat12/24hour-display
P:48 Daylight Saving Time 0:no, 1:automatic, 2:manual
P:49 DSTmonth.day
P:50 DST time of day
P:51 Standardtime, month.day
P:52 Standard time, time of day
P:53 DST adjust (hh:mm)
P:54 Reset:pressing’+’givesdefault
Testfunctions:
P:60 Programversion no.
P:61 Manual control of output K1
P:62 Manual control of output K2
P:63 Manual control of output K3
P:64 Manual control of output K4
P:65 Test of all display segments
P:66 Hysteresis,supplytemperature
The operating procedures are described in section 2.4.
4.2 Reset
P:54 Reset
Note! P:54 is described first, because it may be used to reset all values and to
restart the controller. This is an advantage if you are in doubt about the entered
values of the controller.
You must be aware of the fact, however, that all the manually entered values
will be lost after this restart command, as they are replaced by the factory
(default) values. The clock will also be set to zero.
The default values are listed in section 5.3.
The restart is executed when
–the display shows P:54 and you
–press the + key
Theautomode will rule with ”forced”day time operation, and digital output
K4 will be set to zero, until the time is set.
The display will show P:00, with the time flashing 00:00, to indicate that time
and date has to be set (section 2.4).
Power failure At power failure all activities, except the time update, will cease until the
power returns.
If the clock running reserve (se chap. 5) is insufficient, the display will show
P:00, with the time flashing 00:00, when power has returned. Set the time and
date and make a quick check that the remaining entered values have not been
affected.

TAC AB, Feb 2000 4:3
Specialfunctions, P:16-
TAC 200 User’s Manual
4.3 Control functions
TAC 200 has three separate control functions:
–one controller to limit the power consumption
–one controller for the room temperature
–one controller for the supply water temperature
The controller for the room temperatur is used only when there is a room
sensor. It is recommended to use a room sensor, as the room temperature
controller is very efficient in utilizing the heat stored in the building.
The influence of the outdoor temperature on the supply water temperature is
determined by the reset curve. SPcurve is modified with SPoffset, directly or via
the room temperature controller, by the variable Night setback or Morning
boost.
If the room temperature controller is active, SPoffset will also be affected by the
requested setpoint value, the current room temperature and the min/max-
limits, if specified.
The resulting value may in turn be reduced by min/max-limits, resulting in the
SP value. This value is compared to SPpowlim, the maximum allowable setpoint
calculated by the power limit controller.
The least of these is used as SPsupply for the supply temperature controller.
The pump can be made to turn off at high outdoor temperatures or if SPsupply
has a low value.
Each of these functions is described in more detail in the following.
Reset
curve
Night setback
Morning boost
Time
pgm 1
Out-
door
temp.
SP dial
or
P:05/06 +
SProom REG
Room
temp.
MVroom
Min/max
limits
Room
temp.
(With room sensor)
(Without room sensor)
SPoffset
+
SPcurve
Min/max
limits
SPpowlim SPsupply
SP Least of-
function REG Supply temp. Heating
unit
Supply
water
temp.
MVsupply
REG
Power
Pump
on/off
SPmaxpower
MVpower
Pump
Block diagram for t e controllers of t e TAC 200.