Hep2o 52uh873 User manual

Model: 52UH873

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Table of Contents

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3-4

5-6

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11-12

13

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19-22

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25-29

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Product Image

Table of Contents

What is a Programmable Room Thermostat?

Installation Procedure

LCD Display

Setting the Clock

Temperature Display

Setting the Comfort Levels

Locking the Thermostat

Setting the Temperature

Temperature Hold

Holiday Programming

Frost Protection

Optional Features

Re-calibrating the Thermostat

Factory Reset

Wiring Diagrams

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2Slimline Series1

43 Slimline Series

The best way to do this is to set the room thermostat to a low temperature

– say 18°C , and then turn it up by 1°C each day until you are comfortable with the

temperature. You won’t have to adjust the thermostat further. Any adjustment above

this setting will waste energy and cost you more money.

If your heating system is a boiler with radiators, there will usually be only one

programmable room thermostat to control the whole house. But you can have

(TRVs) on individual radiators.

If you don’t have TRVs, you should choose a temperature that is reasonable for the

whole house. If you do have TRVs, you can choose a slightly higher setting to make

sure that even the coldest room is comfortable, then prevent any overheating in other

rooms by adjusting the TRVs.

You are able to temporarily adjust the heating program by overriding or using the

temperature hold feature. These features are explained further on pages 14 and 15 of

this manual.

so they must not be covered by curtains or blocked by furniture. Nearby electric

properly.

What is a Programmable Room Thermostat?

A programmable room thermostat is both a programmer and a room thermostat.

The room thermostat works by sensing the air temperature, switching on the heating

this set temperature has been reached.

So a programmable room thermostat lets you choose what times you want the heating

to be on, and what temperature it should reach while it is on. It will allow you to select

to meet your particular needs and preferences.

Setting a programmable room thermostat to a higher temperature will not make the

room heat up any faster. How quickly the room heats up depends on the design & size

of the heating system.

down. Setting a programmable room thermostat to a lower temperature will result in the

room being controlled at a lower temperature, and saves energy.

chosen, and then leave it alone to do its job.

65 Slimline Series

1

Installation Procedure

box of 35mm (minimum depth) to be sunk into the wall prior to installation.

Step 1

Carefully separate the front half of the thermostat from the back plate by placing a

Step 2

Place the thermostat front somewhere safe.

Terminate the thermostat as shown in the diagrams on pages 25-29 of this booklet.

Step 3

Screw the thermostat back plate securely into the back box.

Step 4

Clip the front of the thermostat back onto the thermostat back plate.

Do

Mount the thermostat at eye level.

Read the instructions fully so you get the best from our product.

Don’t

Do not push hard on the LCD screen as this may cause irreparable damage.

2

3 4

87 Slimline Series

1. Room Temp - Indicates the current temperature sensor mode.

2. Day Indicator - Displays the current day.

3. Frost Icon - Displayed when the thermostat is in frost protection mode.

4.

5. Temperature Hold - When a Temp Hold is active, HOLD FOR and the remaining

time period is displayed.

6. Set - Indicates when changes are being made to programs or temperature set

points.

7. Holiday Indicator - Displayed when the thermostat is in holiday mode.

8. Current Temp - Indicates the current sensor temperature.

9. Program Cycle Indicator - Displayed during programming only to show which

period is being altered.

10. Keypad Lock Indicator - Displayed when the keypad is locked.

11. Units of Temperature - Degrees Celsius or Fahrenheit.

12. Clock - Digital clock display in 24h format.

LCD Display

12

345

678 91011

12

109 Slimline Series

Setting the Clock

To set the clock, follow these steps.

t With the thermostat turned ON, press the Clock key twice .................................

t Use the Up/Down keys to set the hours ..............................................................

t

t Use the Up/Down keys to set the minutes .........................................................

t

t Use the Up/Down keys to set the day of the week ..........................................

t

Temperature Display

Day

Hours

Minutes

Room Temperature Set Temperature

This is the current room temperature. This is the temperature you are trying to

achieve in your home.

measurement and the target temperature you have set.

1211 Slimline Series

Comfort Levels Explained

The thermostat provides Weekday/Weekend or 7 Day Programming options.

You should consult the “Optional Features”section to select the required mode.

The thermostat is supplied with comfort levels already programmed, but these can be

changed easily. The default times and temperatures are;

08.00 - 21°C (Wake) 09.30 - 16°C (Leave) 16.30 - 22°C (Return) 23.00 - 17°C (Sleep)

If you only want to use 2 levels, you should program the unused levels to --.--

Note: For Weekday/Weekend programming, the 4 comfort levels are the same for all

t To program comfort levels, press Clock once ...................................................................

t Use the Up/Down keys to enter the required WAKE time .......................

t

t Use the Up/Down keys to enter the required WAKE temperature .......

t

t You will now see “LEAVE” displayed on screen.

t Repeat the programming steps for each period until complete.

t For unused periods enter --.-- and the thermostat will ignore the setting.

t

Note:

t In 7 Day programming mode you can repeat for each day independently.

t In Weekday/Weekend programming mode you will see Sat Sun displayed on

screen and can repeat for the weekend.

t To change the programming mode please refer to pages 20-22.

For 7 Day programming,

only Mon is displayed

For Weekday/Weekend programming,

Mon Tue Wed Thu Fri

are displayed on screen.

1413 Slimline Series

Temperature Control

The Up/Down keys allow you to adjust the set temperature .......................

When you press either key, you will see the word SET and the desired

temperature will be displayed on screen.

Use the Up/Down keys to adjust the SET value ..................................................

Press A to and return to main display .............................................

Set Temperature

Set Icon

Locking the Thermostat

The thermostat has a keypad lock facility. To activate the lock follow these steps.

t Press and hold the A and Down keys together for 10 seconds ..........

t You will see the lock symbol appear on screen .............................................

t To unlock, repeat the steps above until the lock symbol disappears.

..

Note: The keypad lock indicator is only displayed when the lock is active.

Note: This override will be maintained until the next programmed comfort level.

Keypad Lock Indicator

1615 Slimline Series

Holiday

Holiday Days

Holiday ON Indicator

Temperature Hold

The temperature hold function allows you to manually override the current operating

t Press H to commence temperature hold ...................................................................

t Use the Up/Down keys to enter the required hold time..............................

t

t Use the Up/Down keys to enter the required hold temperature..............

t

You will see the Hold For indication is displayed on screen.

The time will countdown the set duration and then revert to the normal program.

To cancel temperature hold, follow the same steps but reduce the Hold time to 00:00 hours.

Hold ON Indicator

Hold Time Remaining

Note: A holiday period does not start until 00:00 the next day. For example, if you set

thermostat will revert back to the programmed schedule at 00:00 on Monday.

The holiday function reduces the set temperature in your home to the frost

protection temperature setting (see page 19).

The thermostat will maintain this temperature for the duration of the holiday and will

then automatically return to the program mode on your return.

t Press H three times (until you see the suitcase on screen) .................................

t Use the Up/Down keys to enter the number of days holiday ...................

t

The display will show a suitcase indicating the thermostat is in holiday mode.

To cancel, follow the same steps but reduce the Holiday duration to 00 days.

Thermostat completely OFF Thermostat powered ON

1817 Slimline Series

Pressing the Power button once will place the thermostat in frost protect mode.

In this mode, the thermostat will display the frost icon and will only turn the heating

on should the room temperature drop below the set frost temperature (see page 19).

To cancel the frost protect mode, press the Power button once again.

Frost Protection Mode Enabled

Frost Mode

set temperature but the thermostat remains active.

To turn the thermostat OFF completely, press and hold the Power button..........

The display and heating output will be turned OFF completely.*

To turn the thermostat back ON, press the Power button once again ...................

*See Feature 3 on page 19

2019 Slimline Series

Optional Features Explained

THE FOLLOWING SETTINGS ARE OPTIONAL AND IN MOST CASES

NEED NOT BE ADJUSTED

Feature 01 - Temperature Format: This function allows you to select between °C and °F.

Feature 02 – Switching This function allows you to increase the switching

Feature 03 – Frost Protect: You can set whether the thermostat will maintain the frost

Feature 04 – Frost Protect Temperature: This is the temperature maintained when the

thermostat is in frost mode. The range is 07 - 17°C. The default is 12°C and is suitable for

most applications.

Feature 05 – Output Delay: To prevent rapid switching, an output delay can be entered.

This can be set from 00 - 15 minutes. The default is 00 which means there is no delay.

Feature 06 – Communication Address: This setting is used when you have connected

your thermostat to a network system. Each thermostat on your network must have a

unique communication address. This can be set from 01-32.

Feature 07 – Temperature Up/Down Limit: This function allows you to limit the use

of the Up and Down keys. This limit is also applicable when the thermostat is locked

and so allows you to give others limited control over the heating system.

Feature 08 – Sensor Selection: This thermostat has a built in air sensor.

Feature 09 – Floor Temp Limit: This function is not available on this model.

Feature 10 – Optimum Start: Optimum start will delay the start up of the heating

system to the latest possible moment to avoid unnecessary heating and ensure

the building is warm at the programmed time. The thermostat uses the rate of

change information to calculate how long the heating needs to raise the building

temperature 1°C (with a rate of change of 20, the thermostat has calculated the

heating needs 20 minutes to raise the building temperature 1°C) and starts the

heating accordingly.

Feature 11 – Rate Of Change: This is the number of minutes the thermostat has

calculated it takes to raise your building temperature 1°C. The thermostat will

continue to monitor and learn the heat up time of your home to optimise heating

Feature 12 - Programming Mode:

Weekday/Weekend allows you to program 4 comfort levels for the weekdays and

comfort levels that can be programmed independently.

2221 Slimline Series

Adjusting the Optional Settings Optional Settings - Feature Table

To adjust the optional settings, follow these steps.

t Press and hold the Power button to turn the thermostat OFF ..............................

t Press and hold the Clock key until the display appears as shown below ..........

t Use the Clock key to cycle through the features ......................................................

t Use the Up/Down keys to change the setting ....................................................

t

t Press the Power button once again to turn the thermostat back ON .................

01

02

03

04

05

06

07

08

09

10

11

12

0101

0505

0707

0303

FEATURE

Temperature Format

Frost Mode

Frost Protection Temperature

Output Delay

Communications ID No.

Up/Down Temperature Limit

Sensor Selection

Floor Temperature Limit

Optimum Start

Rate of Change

Program Mode

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DESCRIPTION

00 = oC, 01 = oF (°C = Default)

01o- 03oC (01oC = Default)

00 = Enabled, 01 = Disabled (00 = Default)

07o- 17oC (12oC = Default)

00 - 15 Minutes (00 = Default)

Set unique comms address 01 - 32

00o- 10oC (00 = Default)

Built in Air Sensor

Not used on this model

00 - 03 Hours (00 = Default)

Minutes to raise by 1oC

00 = Weekday/Weekend

01 = 7 Day Programming

(00 = Default)

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SETTING

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Setting Value

Feature Number

All icons displayed simultaneously. Factory reset is complete.

2423 Slimline Series

Re-calibrating the Thermostat

If you need to re-calibrate the thermostat, follow these steps.

t Press and hold the Power button to turn the thermostat OFF ............................

t Press and hold BOTH the Power and Down keys together until the

temperature appears on the screen ........................................................................

t

t Press the Power button once to turn the thermostat back ON ..........................

Factory Reset

To perform a factory reset, follow these steps.

t Press and hold the Power button to turn the thermostat OFF ..........................

t Press and hold the Power and Up keys together until the LCD powers up.

All of the icons will be displayed on screen .........................................................

t When the icons have disappeared from the screen, the thermostat has

been successfully reset.

t Press the Power button once to turn the thermostat back ON .........................

The thermostat has a reset function to restore all settings to their factory defaults.

Calibration Temperature Setting

Set Icon

2625 Slimline Series

TO CONNECT BOILER CONSULT

BOILER MAKERS DIAGRAM

NEUTRAL

LIVE

230V SUPPLY IN

230V AC 50/60Hz

SWITCHED LIVE TO BOILER

52UH873

A1A2 LN

230VAC

Wiring Diagram - 52UH873 to Boiler S/L Wiring Diagram - 52UH873 to Boiler Voltfree

TO CONNECT BOILER CONSULT

BOILER MAKERS DIAGRAM

NEUTRAL

LIVE

LS

LR

230V SUPPLY IN

LS & LR ARE NORMALLY THE

ROOM THERMOSTAT CONNECTIONS

VOLT FREE TO BOILER

230V AC 50/60Hz

52UH873

A1A2 LN

230VAC

THIS UNIT MUST BE PROTECTED BY A FUSE OR RCD THIS UNIT MUST BE PROTECTED BY A FUSE OR RCD

2827 Slimline Series

Wiring Diagram - 52UH873 to Valve

TO CONNECT BOILER CONSULT

BOILER MAKERS DIAGRAM

L

N

LS

LR

LS & LR ARE NORMALLY THE

ROOM THERMOSTAT CONNECTIONS

TO BOILER

HEATING VALVE

NEUTRAL

LIVE

230V SUPPLY IN

230V AC 50/60Hz

52UH873

A1A2 LN

230VAC

Wiring Diagram - 52UH873 to PRC Volt Free Switching

12V

COMMS

CABLE

A2 B2

NONCCNONCCNEL

230V SUPPLY IN Volt Free Output

POWERED RELAY CARD

+

_

Recommendations

Max Cable Size - 1.5MM

Back Box Depth - 35MM

Max Load - 3 Amps

For 230V switched live

output, link mains L to C

52UH873

RT2 RT1 -A2 A1 +

Y B

Network

12VDC

THIS UNIT MUST BE PROTECTED BY A FUSE OR RCD

3029 Slimline Series

Wiring Diagram - 52UH873 to 52UH108

COMMS

CABLE

52UH873

RT2 RT1 -A2 A1 +

Y B

Network

12VDC

52UH108

ZONE X

A2

A1

B

Y

_

+

ZONE X

A2

A1

B

Y

_

+

Connecting 52UH873 to the 52UH108

The 52UH108 allows connection of up to eight

12 volt network thermostats.

When connecting network thermostats

to the 52UH108 use CAT5-FTP or BELDEN 9538.

Connect the screen to Earth at the 52UH108.

Notes

.........................................................................................................................................................................

Hep2O 52UH873 User manual

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