KEY UMS-4PS User manual

OPERATION MANUAL
UMS-4PS
UNIVERSAL WEATHER–COMPENSATING CONTROLLER
Version HC22

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1. Application.
The UMS-4PS weather compensating controller is a microprocessor device designed
for weather compensating central heating temperature control in the installations
powered by a central heating system. The temperature in the central heating
circulation is maintained by controlling the servomotor of the mixing valve.
The controller is equipped with the output designed for controlling the central heating
pump, the temperature of installation water decrease input and the heating turn-off
input. The construction of the device makes it possible to connect parallelly any given
number of UMS-4PS controllers which means that one boiler or central unit may be
connected independently to many central heating systems.
2. Connection.
Before turning the power on, the cables powering the controller, the servomotor of the
mixing valve and the cables powering the central heating pump should be connected
to the appropriate sockets. The outside temperature sensor may be connected
parallelly to any given number of UMS/UMP controllers, bearing in mind that
appropriate contacts should be connected to the suitable contacts of the controller.
Each UMS-4PS controller requires a separate central heating temperature sensor.
Detailed connection scheme is presented in the picture 3.
CAUTION! Before plugging in the controller make sure that the wiring system is
properly grounded.
3. Operation.
The front panel of the controller (picture 1) contains:
1 – Display.
2 – Servomotor of the mixing valve indicator (opening).
3 – Servomotor of the mixing valve indicator (closing).
4 – temperature sensors and additional features control inputs connector
5 – (-) button used for selecting and changing parameters.
6 – OK button used for changing and accepting parameters.
7 – (+) button used for selecting and changing parameters.
8 – (*) button.
9 – central heating pump control connector.
10 – central heating pump control input indicator.
11 – power and the mixing valve servomotor control connector.

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Picture 1. Front panel of UMS-4PS.
The operation of the controller boils down to setting threshold temperatures
WINTER/SUMMER and the value of the decrease in temperature. Controlling the
servomotor of the mixing valve and the central heating pump is obtained automatically
on the basis of the temperatures and service parameters set by a fitter.
During regular work when one of the two measured temperatures is displayed, the
indicator on the extreme right shows the regulation mode of the controller:
– when the light is on, the controller is in the WINTER mode. In this mode the task of
the controller is to maintain an appropriate temperature in the central heating system.
The temperature depends on the outside temperature or the mean outside
temperature as well as the programmed weather characteristics,
– when the light is off, the controller is in the SUMMER mode. In this mode the
controller closes the mixing valve and turns off the central heating pump. To avoid
jamming, the pump is turned on once a day for a minute.
Access to all parameters that can be changed by the user is available thanks to + and
– buttons. The list of all parameters is included in Table 1. The way of changing
particular values can be found in the description of the parameters.

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Table 1 contains the list of all parameters of the user. The first column includes
examples of display indications, the next columns: description of a given parameter,
minimum and maximum set value, jump of the value while being set and the last
column contains the default values set by the producer. They can be restored by
selecting the service function [Prod].
Table 1. List of parameters of the user.
Display Parameter Min Max Jump Default
setings
c50° Temperature of water in central heating circulation
-15° Outside temperature
d-10 Value of installation water temperature decrease -30 0 1°C -10
co C Manual switching between working modes
(WINTER/SUMMER) of the unit C - C
LL10 Threshold temperature WINTER 0 30 1°C 10
LH18 Threshold temperature SUMMER 0 30 1°C 18
E ?? Temperature sensors alarms damage
3.1 Temperature of water in central heating circulation [c50°].
The parameter enables the user to view the measured water temperature of the
central heating system. In order to display the programmed temperature of the central
heating system (the temperature that the regulator is aiming at), press and hold the
OK button. This is signalized by flashing of the first LED on the display e.g. [c.50°].
The regulator returnes to this basic parameter automatically after 60 seconds. This
means the regulator will switch to displaying water temperature of the central heating
circulation when e.g. the user switches to viewing the outside temperature and during
the period of 60 seconds will press no button at all. The exception to the rule are
emergency situations. In such cases, the default alarm is displayed.
3.2 Outside temperature [-15°].
This parameter shows the outside temperature. If the desired temperature of
installation water is counted on the basis of the average outside temperature, press
and hold the OK button to find out the current average outside temperature, e.g.
[A.-10].
3.3 The rate of installation water temperature decrease [d-10].
The value set in this parameter determines by how many degrees the temperature of
the installation water in the central heating system will be decreased in the case of
opening contacts of nighttime temperature decrease input. This is calculated on the
weather characteristics.
In order to change the parameter you need to press the OK button, while it is being
displayed. The regulator will switch into the edition mode, signalized by flashing digits
of the parameter being changed. By pressing (+,-) buttons, you need to set the desired
level of temperature and confirm your choice with the OK button. Pressing the (*)
button will cause cancellation of the introduced change and exiting the edition mode.
Also, the cancellation of changes will occur, if the parameter will not be confirmed
during 60 seconds since the last change

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3.4 Switching (WINTER/SUMMER) working modes of the unit manually [co C].
The parameter enables the user to switch the regulator manually between the
WINTER/SUMMER working modes. The switching occurs after pressing the OK
button. The notice [co C] means WINTER mode, whereas [co -] – SUMMER mode.
CAUTION! Any attempts of switching controller’s working modes manually might
result in failure if it is the outside temperature that forces the switching automatically
(e.g. an attempt of turning on the SUMMER mode at the outside temperature below
zero).
3.5 Temperature threshold [LL10] / [LH18].
In order to eliminate the influence of the frequent changes in outside temperature on
the work of the UMS-4PS controller, a possibility of programming the threshold
temperatures for changing to WINTER mode ([LL10]) and SUMMER mode ([LH18])
has been implemented. Changing between these mode is automatic after the outside
temperature exceedes one of the threshold temperatures. The changes of threshold
temperatures are made in the same way as programming night inside temperature
decrease.
CAUTION! When the outside temperature sensor is out of order, the controller does
not switch the WINTER/SUMMER modes automatically. However, the switch between
the modes can be made manually.
3.6 Temperature sensors damage.
The regulator tests functioning of measuring channels continually. In case of detecting
a damage, the coded alarm is displayed, and the regulator starts to operate. The list of
alarm codes and the description of regulator reaction is shown in table 2. In an
emergency, one has to turn off the regulator, connect power to central heating pump
permanently, open the mixing valve manually and contact technical staff.
Table 2. The list of alarm codes and responses from the control unit.
Code Description Controller's response
E 2 Central heating sensor
failure The mixing valve is open after selecting the WINTER mode. Temperature decreasing and central heating
installation turn-off option are not available.
E 4 Outside temperature
sensor failure No automatic switching between WINTER/SUMMER working modes. 0°C outside temperature is taken
into account when programming the central heating
temperature.
CAUTION! When damaging the outside temperature sensor and the central heating
temperature sensor occurs at the same time, the regulator will display the [E 6] alarm.
4. Default settings.
To restore service mode, press and hold the (*) button for about 3 sec. It is possible to
check the parameters using the (+, -) buttons. After selecting a desired parameter,
press the OK button to enter the operation mode signalled by blinking of the selected

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parameter. To make a selection, use the (+, -) buttons. In order to confirm new settings
you should use the OK button; then the regulator enables the user to select the next
parameter. Pressing the (*) button during edition will cancel the introduced change.
Exiting the default settings follows automatically 60 seconds after the recent use of the
button or selecting and confirming [End] option.
CAUTION! If the regulator is in the service mode, the work of control devices is
stopped until the time of exiting the mode.
In table 1 the list of all available parameters has been presented. The first column
contains examples of display unit indications, the next columns – description of
a parameter, the minimum and maximum values possible to set, as well as a change
of the value while setting; the values preprogrammed by the producer are included in
the last column. One may return to the values by selecting the [Prod] option.
Table 3. The list of service parameters.
Display Parameter Min Max Jump Default
settings
to 1 Module operating mode and the type of the outdoor
temperature sensor. 0 1 1 1
cF40 The ratio of the weather characteristics inclination. 20 80 1 40
cr 0 Changing the weather characteristics. –9 9 1°C 0
cL20 The minimum temperature of heating circuit water. 5 60 1°C 20
cH75 The maximum temperature of central heating
circulation. 40 90 1°C 75
ch 2 Mixing valve servomotor work hysteresis. 1 9 1°C 2
cP 2 Duration of pulse controlling the mixing valve actuator. 1 99 1s 2
t 20 Pause between impulses controlling the servomotor. ---,1 240 1s 20
cn-- Mixing valve shift duration. --,1 99 1min --
n--- Quantity of measurements used to calculate the average outside temperature. ---, 1 144 1 ---
o 0 The correction ratio of the outside temperature sensor. –30 30 1 0
Prod Restoring producer's settings.
outc The mixing valve output testing – closing. outc out1
outo The mixing valve output testing – opening. outo out2
outP Central heating pump output testing. outP out3
End Exiting the default settings.
4.1 Module operating mode and type of the temperature sensor.
Depending on the setting of the service parameter [to 1] the module can work in one of
the two modes.
The [to 0] mode means that the module controls the mixing valve maintaining
a constant, preset by the user, temperature of the heating circuit. In this mode, the
outside temperature sensor input may be left unconnected.
The [to 1] mode indicates that the module is working in a weather-based mode, which
means that the water temperature in the heating circuit depends on the outdoor
temperature. In this mode it is necessary to connect the outdoor temperature sensor.

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4.2 Weather characteristics.
The temperature of the installation water needed for maintaining constant room
temperature depends mainly on the outside temperature and thermal characteristics of
the given building. The UMS-4PS unit enables the user to set the adequate inclination
and change the weather characteristics. The relation between the outside temperature
(or averaged outside temperature), the set parameters and the programmed water
temperature of central heating system is shown in picture 2.
Picture 2. Weather characteristics. (Programmed temperature of the central heating
system, Maximum temperature in central heating circulation, e.g. 90°C, Outside
temperature [°C].)

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The ratio of the weather characteristics inclination [cF40] – the parameter
determines the temperature of water in the central heating system when it is 0°C
outside. In the graph (picture 2) the relation between the outside temperature and the
temperature of water in the central heating system for ten examples of parameter
settings [cF ] has been shown.
Adjusting the weather characteristics of central heating circulation [cr 0] – the
parameter determines by how many degrees the programmed temperature of central
heating water, calculating on the weather characteristics, will be revalued.
The minimum temperature of central heating circuit [cL20] – this parameter
defines the minimum temperature of water in the central heating circuit. If the
temperature calculated from the weather curve, after shifting the curve by the heating
curve offset [cr 0], will be lower than this minimum temperature, then the target heating
circuit temperature willl be raised to the minimum temperature set by this parameter.
The maximum temperature of central heating circulation [cH75]] – the parameter
defines the maximum programmed temperature of water in central heating circulation.
If temperature calculated on the weather characteristics, after considering the heating
curve change by value [cr 0], exceeds the maximum temperature, then the
programmed temperature of the central heating circulation will be limited to the value
set in this parameter. Protection from excessive increase of central heating circulation
temperature is of considerable significance in case of underfloor heating where the
temperature should not exceed 50°C.
CAUTION! Additional guard protecting installation from excessive rise of temperature
should be used in underfloor heating systems regardless of the maximum program-
med temperature.
4.3 Mixing valve servomotor working parameters.
Hysteresis of mixing valve servomotor working [ch 2] – the mixing valve
servomotor is stopped after achieving the programmed, calculated on the weather
characteristics, temperature of water in central heating circulation. When the rise in
temperature of water in central heating circulation is continued, the regulator closes
the mixing valve. The parameter determines the value by which the temperature of
central heating circulation needs to fall below the programmed one, so that the
regulator could proceed to open the valve.
Duration of pulse controlling the mixing valve actuator [cP 2] – the parameter de-
fines the period of time during which the mixing valve is turned on when being opened
or closed. When fast actuators are applied, setting the short time control pulse is re-
commended.
Interval between impulses transmitted to control the servomotor [t 20] – the
parameter determines the pause between impulses controlling the mixing valve
servomotor. The duration of the steering pulse is constant and equals 2 seconds. In
case of using fast servomotors, a longer break is recommended. Changing the
parameter to [t---] allows the servomotor to work continually.

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Mixing valve shift duration [cn--] – the parameter defines the time necessary for mo-
ving the mixing valve between the side positions when the continuous control pulse is
on. When the value of the parameter is different from ”--”, the controller starts to count
the control pulses duration. When the actuator is activated long enough into one of the
directions, the controller will recognize that the mixing valve has achieved full (depen-
ding on the operation direction) opening or closing. Then, the valve control is stopped
until the need of change of the work direction occurs. The function aims to reduce the
quantity of unnecessary activations of relays controlling the mixing valve actuator ope-
ration. Setting the parameter to the value ”--” disables the function.
4.4 Averaged measurement of the outside temperature.
The unit UMP-4PS records a change in the outside temperature every ten minutes.
Each measurement is stored in the unit memory for 24 hours. The saved measure-
ments might be used when calculating the average outside temperature.
Quantity of measurements used to calculate the average outside temperature [n-
---] the parameter determines on how many recent measurements the average outsi-
de temperature will be calculated. The value received this way helps to determine the
level of the programmed installation water temperature based upon the weather chara-
cteristics. Changing the parameter to [n---] results in the current outside temperature
which is used to calculate the programmed installation water temperature.
CAUTION! The memory containing the outside temperature measurements is erased
when turning off the power. If the device has been working for less than 24 hours, then
the average outside temperature will be calculated on the basis of the available data.
4.5 Correction of the outside temperature sensor indications.
The correction ratio of the outside temperature sensor [o 0] – long connecting
wires as well as overload by units connected parallelly might be a cause of faulty
results when measuring the outside temperature. The parameter enables to correct an
error. Transition of correction rate by 1 corresponds to a change of indication by circa
0.3°C.
4.6 Producer’s default settings.
The regulator enables the user to restore the default settings programmed by the
producer by selecting [Prod] on display unit and pressing the OK button. After
activating the option, the regulator enters the values of respective parameters given in
tables 1 and 3.
4.7 Output testing.
In order to verify the accurate functioning of the regulator, it is possible to test output
setup controlling the central heating pump and mixing valve servomotor. Selecting
[outc] on the display allows, using the OK button, to turn on closing the mixing valve,
choosing [outo] with OK button turns on opening the mixing valve, choosing [outP] by
pressing OK, turns on the central heating pump.

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4.8 Exiting default settings.
Selecting [End] on the display and pressing the OK button results in exiting the
parameter setting mode. Also, when during 60 seconds no buttons will be pressed at
all, exiting the mode occurs.
5. Additional features.
5.1 Installation water temperature decrease input.
The unit UMS-4PS has been equipped with input of decreasing the temperature of
installation water. Opening the contacts of this input makes the temperature of water in
central heating circulation fall by the value programmed by the user (see 3.3). The
solution enables the decrease of room nighttime temperature by connecting it to the
outside unit – a programmed clock. Decreasing the temperature of water in central
heating installation can be as well controlled by any room thermostat equipped with
a contact output.
CAUTION! If the option of nighttime decrease is not used, then the contacts 6-7 of the
regulator should be closed or value of the parameter [d-10] should be changed to “0”.
CAUTION! Installation water temperature decrease input shall not be connected to
any other UMP/UMS inputs directly.
5.2 Central heating turn-off input.
Closing 7-8 contacts of UMS-4PS unit will turn off the central heating system. The unit
will close the mixing valve (as in SUMMER mode), however it will not turn off the
central heating pump (as in WINTER mode). Additionally, the safety system will be
turned on to protect the central heating installation from freezing. Connecting the
programmed clock to the input will automatically turn off the heating at preferred times.
CAUTION! If the heating turn-off option is not in use, contacts 7-8 of the unit should be
left open.
CAUTION! The central heating turn-off option has a priority over the installation water
temperature decrease option. This means that if both options are turned on – the
heating turn-off option will be carried out.
CAUTION! The heating turn-off inputs must not be connected with any other
UMP/UMS inputs directly.
6. Controller disassembly.
If controller disassembly is necessary, follow the procedure:
– Disconnect it from power supply
– Disconnect and place the controlling wires in safety
– Disconnect sensor wir e
– Remove the controller.

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When several units of a system are connected parallelly, you need to take care of
proper supply of power to the sensors while disconnecting the UMS-4PS equipped
with jumpers at sensor inputs. This can be obtained by placing jumpers at one of the
remaining units.
7. Technical specification
Power supply 230 V ± 10%, 50 Hz
Power consumption (without control devices) <2 VA
Temperature measurement range - 40°C ÷ 109°C ± 1°C
Outputs rating 1 A / 230 V
Dimensions (HxWxL) 89 × 67 × 65 mm
8. Notes.
Display Parameter User's
settings
to 1 Module operating mode and the type of the outdoor temperature
sensor.
d-10 Value of decrease in installation water temperature.
LL10 Threshold temperature WINTER.
LH18 Threshold temperature SUMMER.
cF40 The ratio of the weather characteristics inclination.
cr 0 Changing the weather characteristics.
cL20 The minimum temperature of heating circuit water.
cH75 The maximum temperature of central heating circulation.
ch 2 Mixing valve servomotor work hysteresis.
cP 2 Duration of pulse controlling the mixing valve actuator.
t 20 Pause between impulses controlling the mixing valve servomotor.
cn-- Mixing valve shift duration.
n--- Number of measurements used to calculate the average outside
temperature used to calculate the average outside temperature.
o 0 The correction ratio of measuring channels.

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Picture 3. UMS-4PS controller and boiler configuration scheme.

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DECLARATION OF CONFORMITY
Manufacturer:Przedsiębiorstwo Wielobranżowe KEY
11-200 Bartoszyce, ul. Bohaterów Warszawy 67
hereby declares that the product:
UMS–4PS
is in conformity with provisions of the following directives:
2006/95 / EC (LDV) of 12.12.2006r. on the harmonization laws of the
Member States of the EU relating to equipment Electrical for use within
certain limits, voltage,
2004/108 / EC (EMC) of 15.12.2004r. compatibility electromagnetic
and that the following harmonized standards:
EN 60730-1: 2000 (BS EN 60730-1: 2002)
EN 60730-2-9: 2010 (BS EN 60730-2-9: 2011)
EN 61000-3-2: 2006 (BS EN 61000-3-2: 2007)
EN 61000-3-3: 2008 (BS EN 61000-3-3: 2011)
Information on disposal
This appliance is marked according to the European Directive 2002/96/EC on Waste
Electrical and Electronic Equipment (WEEE).
The symbol on the product, or the documents accompanying the product, indicates that
his appliance may not be treated as household waste. The appliance shall be handed
over to the applicable collection point for used up electrical and electronic equipment
for recycling purpose.
Ultimate disposal of the appliance shall follow according to applicable local regulations
on waste utilization. For more information about disposal, utilization and recycling
please contact your local authorities, household waste disposal service or the shop
where you purchased the product.

Manufacturer:P.W. KEY
11-200 Bartoszyce, ul. Bohaterów Warszawy 67
tel. [phone], fax. [phone]
www.pwkey.pl e-mail: p[email protected]