Heatmiser HC, HC-N Operating Instructions Manual
Operating Instructions
Model : HC
HC-N
This product should be installed by a qualified electrician.
Improper installation may result in injury, death or
property damage.
Contents Table
Contents 1
What is a room thermostat 2-3
What is a programmable thermostat 4-6
Installation 7-8
Initial Setup Procedure 9-12
Symbols Explained 13
Button Layout 14
Temperature Display 15
Setting the Clock 15
Temperature Override 16
Fan Speed Select 16
Heating Mode Operation 17-18
Cooling Mode Operation 19
Auto Heating & Cooling Operation 20-21
Keylock 22
Wiring
Wiring Diagram 23-28
1
What is a room thermostat?
A room thermostat simply switches the heating system on and off
as necessary. It works by sensing the air temperature, switching
on the heating when the air temperature falls below the thermostat
setting, and switching it off once this set temperature has been
reached.
Turning a room thermostat to a higher setting will not make the
room heat up any faster. How quickly the room heats up depends
on the design of the heating system, for example, the size of the
boiler and radiators.
Neither does the setting effect how quickly the rooms cools down.
Turning a room thermostat to a lower setting will result in the room
being controlled at a lower temperature, and saves energy.
The heating system will not work if a time switch or programmer
has switched it off.
The way to set and use your room thermostat is to find the lowest
temperature setting that you are comfortable with and then leave it
alone to do its job. The best way to do this is to set the room
thermostat to a low 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 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 room thermostat to control the whole house. But you can
have different temperatures in individual rooms by installing
thermostatic radiator valves (TRV’s) 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.
Room thermostats need a free flow of air to sense the temperature,
so they must not be covered by curtains or blocked by furniture.
Nearby electric fires, televisions, wall or table lamps may prevent
the thermostat from working properly.
3
4
What is a programmable room thermostat?
A programmable room thermostat is both a programmer and a room
thermostat. A programmer allows you to set On and "Off time periods to suit your own lifestyle. A room thermostat works by sensing
the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once 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 different temperatures
in your home at different times of the day (and days of the week) to
meet your particular needs.
Turning a programmable room thermostat to a higher setting will not
make the room heat up any faster. How quickly the room heats up
depends on the design of the heating system, for example, the size
of the boiler and radiators.
Neither does the setting effect how quickly the room cools down.
Turning a programmable room thermostat to a lower setting will
result in the room being controlled at a lower temperature, and
saves energy.
The way to set and use your programmable room thermostat is to
find the lowest temperature settings that you are comfortable with
and the different times you have chosen and then leave it alone to
do its job.
The best way to do this is to set low temperatures first, say 18ºC,
and then turn them up by one degree each day until you are
comfortable with the temperatures. You wont have to adjust the
thermostat further. Any adjustment above these 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 different temperatures in individual rooms
by installing thermostatic radiator valves (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.
The time on the programmer must be correct. Some types have to
be adjusted in spring and Autumn at the change between
Greenwich Mean Time and British Summer Time.
5
You may be able to temporarily adjust the heating programme, for
example “Override”, “Advance” or “Boost” These are explained in
the manufacturers instructions.
Programmable room thermostats need a free flow of air to sense
the temperature, so they must not be covered by curtains or blocked
by furniture. Nearby electric fires, televisions, wall or table lamps
may prevent the thermostat from working properly.
6
Installation Procedure
DO`s
1.Do mount the thermostat at eye level.
2.Do read the instructions fully so that you get the best from our
product.
DON’T`s
1.Do not install near a direct heat source as this will effect the
workings of the thermostat.
2.Do not push hard on the LCD otherwise you will damage the liquid
crystal display and this is not repairable.
Installation
The thermostat is designed to be flush mount, a back box of 35mm
should have been sunk in the wall prior to installation.
Step 1
Carefully separate the front half of the thermostat from the back
plate by placing a small flat head terminal driver in to the slots on
the bottom face of the thermostat.
7
Step 2
Carefully unplug the ribbon connector which is plugged in to the
front half of the thermostat.
Place the thermostat front half somewhere safe.
Terminate the thermostat as shown in the diagrams at the back of
this booklet.
Screw the thermostat back plate on to the back box
Step 3
Re-connect the thermostat ribbon cable and clip the two halves
together.
Step 4
Turn on the power to the thermostat and allow
the thermostat to stabilise for 1 hour before
calibrating.
8
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