Heatmiser HC User manual

Operating Instructions
Model :HC
HC-N
This product should be installed byaqualifiedelectrician.
Improper installation may result ininjury,death or
property damage.

ContentsTable
Contents 1
What is aroom thermostat 2-3
What is aprogrammable thermostat 4-6
Installation 7-8
Initial SetupProcedure 9-12
Symbols Explained 13
Button Layout 14
TemperatureDisplay 15
Setting the Clock 15
TemperatureOverride 16
Fan Speed Select 16
Heating Mode Operation 17-18
Cooling Mode Operation 19
Auto Heating&CoolingOperation 20-21
Keylock 22
Wiring
Wiring Diagram 23-28
1

Whatisaroomthermostat?
Aroomthermostat simply switches the heating systemon and off
as necessary.It works by sensing the air temperature, switching
on theheating when the air temperaturefalls belowthe thermostat
setting,and switching it offoncethis set temperature has been
reached.
Turning aroomthermostat toahigher setting will not make the
room heat up anyfaster.Howquickly the room heats updepends
on thedesign of the heating system, forexample, the size of the
boiler and radiators.
Neitherdoes the setting effect how quickly the rooms cools down.
Turning aroomthermostat toalower setting will result in the room
being controlled atalower temperature,and savesenergy.
The heating systemwill notwork if atime switchor programmer
has switched it off.
The way to set and use yourroom thermostat is to findthe lowest
temperature setting that youare comfortablewith and then leave it
alone to do itsjob. The best way to dothis is to set the room
thermostat to alow temperature -say 18ºC- and turn it up by 1ºC
2

each day until you are comfortable with the temperature. You wont
have to adjust the thermostatfurther.Anyadjustment above this
setting will waste energyand costyou more money.
Ifyour heating system is aboiler with radiators, there will usually be
only one roomthermostat tocontrol thewhole house. But you can
have different temperaturesin individual rooms byinstalling
thermostatic radiator valves(TRV’s)on individual radiators. If you
don'thave TRVs you should choose atemperature that is
reasonable for the wholehouse. If you do haveTRVsyou can
choose aslightly highersetting to make sure that even thecoldest
room is comfortable, then prevent any overheating in other rooms
byadjustingthe TRVs.
Room thermostatsneedafree flowof air to sense the temperature,
sothey mustnot be covered by curtainsor blockedby furniture.
Nearby electric fires, televisions, wall or table lamps may prevent
thethermostat fromworkingproperly.
3

4
Whatisaprogrammableroomthermostat?
Aprogrammable room thermostat is both aprogrammer and a room
thermostat. Aprogrammer allows you toset On and"Offtime peri-
ods to suit your own lifestyle. Aroom thermostat works by sensing
theair temperature, switching on the heating when the airtempera-
ture falls below the thermostat setting, and switching it offonce this
set temperature has been reached.
So, aprogrammable room thermostat lets youchoose what times
you want theheating to be on, and what temperature it should
reach while it is on. It will allow youto selectdifferent temperatures
inyour homeat different times of the day (and days of the week) to
meet your particular needs.
Turning a programmable roomthermostat to ahigher setting will not
make the room heat upany faster.How quickly the roomheatsup
depends on the design ofthe heatingsystem, for example, the size
ofthe boiler and radiators.
Neither doesthe settingeffect how quickly the room cools down.
Turning a programmable roomthermostat to alower setting will
result in theroom beingcontrolledat alower temperature, and
saves energy.

The way to set and useyour programmable room thermostatis to
find the lowest temperature settingsthat you are comfortable with
and the differenttimes you have chosenand then leave it aloneto
doits job.
The best wayto do thisis to set lowtemperatures first,say 18ºC,
and then turnthem up byone degreeeach dayuntil you are
comfortable with the temperatures. Youwont haveto adjust the
thermostat further.Any adjustment abovethese setting will waste
energy and cost you more money.
Ifyour heating system is aboiler with radiators, there will usually be
only one programmableroom thermostat to controlthe whole
house. But you can havedifferent temperatures inindividual rooms
byinstalling thermostatic radiator valves (TRVs)on individual
radiators. If you don't have TRVs, you should chooseatemperature
that is reasonable for thewhole house. If you do have TRVs, you
can choose a slightly higher settingto make sure that even the
coldest roomis comfortable,then prevent any overheating in other
rooms by adjusting the TRVs.
The time onthe programmer mustbe correct. Some types have to
beadjusted in spring andAutumn atthe changebetween
Greenwich Mean Timeand BritishSummer Time.
5

You maybe able to temporarilyadjust theheating programme, for
example “Override”, “Advance” or“Boost” Theseare explained in
themanufacturers instructions.
Programmable room thermostatsneed afreeflow of airto sense
thetemperature, so theymust notbe coveredby curtains or blocked
byfurniture.Nearby electric fires,televisions,wall or table lamps
may preventthe thermostat from working properly.
6

Installation Procedure
DO`s
1.Do mount the thermostat ateye level.
2.Do read theinstructions fully so that you getthe best from our
product.
DON’T`s
1.Do not install near adirectheat sourceas this will effect the
workings of the thermostat.
2.Do not pushhard on the LCD otherwise youwill damage the liquid
crystaldisplay andthis is notrepairable.
Installation
The thermostat isdesigned tobe flush mount, aback box of 35mm
should have been sunk in the wall prior to installation.
Step1
Carefully separatethe front half of the thermostat from the back
plate by placing asmallflat head terminal driver in to theslotson
thebottom face of the thermostat.
7

Step2
Carefully unplug the ribbon connector which isplugged into the
front half of the thermostat.
Place the thermostat front half somewhere safe.
Terminate thethermostat asshown in the diagramsat the backof
this booklet.
Screw the thermostat back plate on to the back box
Step3
Re-connect the thermostat ribbon cableand clip thetwo halves
together.
Step4
Turn on the power tothe thermostatand allow
thethermostat to stabilise for 1hour before
calibrating.
8

.
9
HowToSetup Your Thermostat
This thermostat has many options available to you.Once youhave
set these settings you can leave them. They will be stored inthe
thermostat memory and do not need to be adjustedlater.
You needto use the table opposite asareferenceguide when
initially setting up the thermostat.
Westrongly suggest you read the nextfew pages so that you fully
understand the features available and theintended use.
You should also understandthat by enabling one feature, another
feature maybe made unavailable. Thisis becausethe featureis not
available in that mode.
Pleaseread thefeatures now,and then follow the setup routine
on the followingpages.

10
FeatureTable
Feature Feature Setting
01 Temperature Format °C01=°F
02 Switching Differential 01=1°C/F,02=2°C/F 03=3°C/F
03 TempCalibrate Entervalue
04 Frost Mode 00 Disabled01 Enabled
(01 -default)
05 Frost Protection 07-17°C(12°Cdefault)
06 Output Delay Enter Value (00min default)
07 Comms No(HE-N) 01 -32
08 OptimumStart 00 Disabled (Default)
01-hr 02hr 03=3hr
09 Rate of Change Information Only
10 Mode 00=Heating 01=Cooling
02=Heating &Cooling
11 Heat/Cool Deadband Range=02°C-10°C
default =02

Understanding theFeatures
The installer should read the following features and then setup
the thermostat accordingto the features required.
Temperature Format: Select between°Cor °F
Switching Differential: This isthe number of degrees the heating
switches back onbelow the set temperature.
Temperature Calibrate: The thermostatis calibrated from the
factory,butyou can use this function to calibrate if required.
FrostMode: Youcan set whether the thermostat will maintain the
frost temperatureeven whenthe thermostat has been turned off
with thepower button. As adefault, this is enabled.
FrostProtectionTemperature: This is usedto set the required
frost temperature.The range is07 -17°C
OutputDelay: Toprevent rapidswitching,an output delay can be
entered. This can befrom 00 - 30 minutes.
11

Understanding theFeatures (Cont)
Optimum Start: (This feature is only available on the PRT
model) Optimum start will delay the start upof the heating system
tothe latest possible moment, to avoid unnecessary
heating, so that the dwelling is comfortably warm bythe
programmedtime.
Rate of Change: (This featureis only available onthe PRT
model) Thissetting iscalculated by the thermostat.
Mode: In heating mode, the thermostatwill be active when the
room temperature is below the settemperature. In cooling mode,
thethermostat will be activewhen the room temperature is above
theset temperature. In Heating & Cooling (Auto) mode, the thermo-
stat will automatically switchbetween heating and cooling.
Deadband: The deadband settingis used in Heating &Cooling
(Auto) modeand is usedto ensurethere is noconflict between
heating and cooling. With adeadband setting of02 and a heating
set temperature of 20°C, theminimumcooling temperature is 22°C.
12

Setting up theFeatures:
Withthe HC turned off, pressfor 3seconds
On the LCD youwill see 01(small) tothe top right, and 00 (large) in
the centre.
Small setting =Feature # Large setting =Setting
•Use the Up/Down arrow key tochange thesetting.
•Press to accept and proceedto the nextfeature.
13
LCD Symbols
ClockIndicator
HeatActive
CoolActive
Auto AutoHeat/CoolActive
Frost Mode On
KeylockOn
Flashing OptimumStartActive

14
3. Button Layout
M
On/Off
Button Mode
Select Clock
Button Fan
Speed Down
Button Up
Button
Infrared Receiver

TemperatureDisplay
Room Temp=Currentroom temperature
SET= Displayed when you are adjustingthe temperature setting.
Setting theClock
Toset the clock within the HE, follow the stepsbelow.
•With the thermostat on,press until you see the clockflash
•You arenow able to set the minutes usingthe up/down keys
•PressMto accept
•You arenow able to set the hours using the up/downkeys
•PressMto accept
•You arenow able to set the day of the week using the up/down
keys
•Pressto storeand exit
The clock isnow set. The HE has abattery whichmaintains the
clock on apower failure. All programsettingsare retained in flash
memory for10 years.
15

16
TemperatureOverride
Using theUp/Downarrow keysyou can adjust the current set
temperature. On thescreen, you will seeSETand the new
temperature displayed. This temperature will be maintained until
the nextprogrammed comfortlevel. Press to accept and exit.
In Auto mode, if youhave increased the heating set point using this
function,the coolingset point will adjust automaticallyensuring the
deadbandsetting ismaintained.
FanControl
In all modes, thereare 4fan modes whichyou can select usingthe
fan button. You can select between Auto, High, Mediumor Low. In
Auto fanspeed, thethermostat will automatically switch the fan
betweenhigh, medium or low as described below.
Heating:1°Cbelow =Low,2°Cbelow =Medium, 3°C below =High
Cooling:1°Cabove =Low,2°Cabove =Medium, 3°C above =High
Auto Fan Speed SelectedHigh Fan Speed
Medium Fan Speed Low Fan Speed
The fanwill be offwhenthere is noswitchingtime programmed.

Heating Mode
Inheating mode, there are two temperature settings and four
switching times for theweekday and 4different switching times for
theweekend.
Timer ONtemperature: Duringaswitching time, thistemperature
setting is maintained.
Timer OFF temperature: When the thermostatis not in a
programmedswitchingtime, the thermostat will maintain this
temperatureto protect the buildingagainst frost.
Press tostore or wait 30s andthe settingwill be stored
automatically.
Programming the temperaturesettings.
Press once
You can now set theTimer ONtemperature using theUp/Down
arrow keys.
Press again
You can now set theTimer OFFtemperature using the Up/Down
arrow keys.
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18
Programming theSwitching Times
You can program 4 switching for the weekday and 4different
switching times for theweekend.
Todo this follow the steps below;
Press three times.
You can now enter the 1st TimerOn setting
Press M
You can now enter the 1st TimerOffsetting
You can repeat this for the remaining switching timesfor the week
and weekend.For unused switching times, set --.--
Press tostore or wait 30s andthe settingwill be stored
automatically.
Manual Override
Pressing theMbutton will overridethe current state of the timer.If
thethermostat is in a Timer On condition, pressingMwill override
thethermostat intoTimer Offmode and viceversa.

19
Cooling Mode
Incooling mode, there is asingle temperaturesetting andfour
switching times for theweekday and 4different switching times for
theweekend.
Programming the cooling temperature setting.
Press once
You can now set thecooling temperature using the Up/Down arrow
keys.
Press tostore or wait 30s andthe settingwill be stored
automatically.
Programming theSwitching Times
You can program 4 switching for the weekday and 4different
switching times for theweekend.
Press twice
You can now enter the 1st TimerOn setting
Press M
You can now enter the 1st TimerOffsetting
Repeat this for the remaining switching times.For unused switching
times enter --.--Pressto store or wait 30s and the setting willbe
stored automatically.