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

.

9

How To Setup Your Thermostat

This thermostat has many options available to you. Once you have
set these settings you can leave them. They will be stored in the
thermostat memory and do not need to be adjusted later.

You need to use the table opposite as a reference guide when
initially setting up the thermostat.

We strongly suggest you read the next few pages so that you fully
understand the features available and the intended use.

You should also understand that by enabling one feature, another
feature maybe made unavailable. This is because the feature is not
available in that mode.

Please read the features now, and then follow the setup routine

on the following pages.

10

Feature Table

Feature

Feature Setting

01 Temperature Format °C 01=°F
02 Switching Differential 01=1°C/F, 02=2°C/F 03=3°C/F

03 Temp Calibrate Enter value
04 Frost Mode 00 Disabled 01 Enabled

(01 - default)

05 Frost Protection 07-17°C (12°C default)
06 Output Delay Enter Value (00 min default)

07

Comms No (HE-N) 01 - 32

08 Optimum Start 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 the Features

The installer should read the following features and then setup
the thermostat according to the features required.

Temperature Format: Select between°C or °F
Switching Differential: This is the number of degrees the heating

switches back on below the set temperature.
Temperature Calibrate: The thermostat is calibrated from the

factory, but you can use this function to calibrate if required.
Frost Mode: You can set whether the thermostat will maintain the

frost temperature even when the thermostat has been turned off
with the power button. As a default, this is enabled.

Frost Protection Temperature: This is used to set the required
frost temperature. The range is 07 - 17°C

Output Delay: To prevent rapid switching, an output delay can be
entered. This can be from 00 - 30 minutes.

11

Understanding the Features (Cont)

Optimum Start: (This feature is only available on the PRT
model) Optimum start will delay the start up of the heating system

to the latest possible moment, to avoid unnecessary
heating, so that the dwelling is comfortably warm by the
programmed time.

Rate of Change: (This feature is only available on the PRT
model) This setting is calculated by the thermostat.

Mode: In heating mode, the thermostat will be active when the

room temperature is below the set temperature. In cooling mode,
the thermostat will be active when the room temperature is above
the set temperature. In Heating & Cooling (Auto) mode, the thermo­stat will automatically switch between heating and cooling.

Deadband: The deadband setting is used in Heating & Cooling
(Auto) mode and is used to ensure there is no conflict between
heating and cooling. With a deadband setting of 02 and a heating
set temperature of 20°C, the minimum cooling temperature is 22°C.

12

Setting up the Features:

With the HC turned off, press for 3 seconds
On the LCD you will see 01(small) to the top right, and 00 (large) in
the centre.

Small setting = Feature # Large setting = Setting

• Use the Up/Down arrow key to change the setting.

• Press to accept and proceed to the next feature.

13

LCD Symbols

Clock Indicator
Heat Active
Cool Active

Auto Auto Heat/Cool Active

Frost Mode On
Keylock On

Flashing

Optimum Start Active

14

3. Button Layout

M

On/Off
Button

Mode
Select

Clock

Button

Fan

Speed

Down
Button

Up

Button

Infrared Receiver

Temperature Display

Room Temp= Current room temperature
SET= Displayed when you are adjusting the temperature setting.

Setting the Clock

To set the clock within the HE, follow the steps below.

• With the thermostat on, press until you see the clock flash

• You are now able to set the minutes using the up/down keys

• Press M to accept

• You are now able to set the hours using the up/down keys

• Press M to accept

• You are now able to set the day of the week using the up/down
keys

• Press to store and exit

The clock is now set. The HE has a battery which maintains the
clock on a power failure. All program settings are retained in flash

memory for 10 years.

15

16

Temperature Override

Using the Up/Down arrow keys you can adjust the current set
temperature. On the screen, you will see SET and the new
temperature displayed. This temperature will be maintained until
the next programmed comfort level. Press to accept and exit.

In Auto mode, if you have increased the heating set point using this
function, the cooling set point will adjust automatically ensuring the
deadband setting is maintained.

Fan Control

In all modes, there are 4 fan modes which you can select using the
fan button. You can select between Auto, High, Medium or Low. In
Auto fan speed, the thermostat will automatically switch the fan
between high, medium or low as described below.

Heating: 1°C below = Low, 2°C below = Medium, 3°C below = High
Cooling: 1°C above = Low, 2°C above = Medium, 3°C above = High

Auto Fan Speed Selected High Fan Speed
Medium Fan Speed Low Fan Speed

The fan will be off when there is no switching time programmed.

Heating Mode

In heating mode, there are two temperature settings and four
switching times for the weekday and 4 different switching times for
the weekend.

Timer ON temperature: During a switching time, this temperature
setting is maintained.

Timer OFF temperature: When the thermostat is not in a
programmed switching time, the thermostat will maintain this
temperature to protect the building against frost.

Press to store or wait 30s and the setting will be stored
automatically.

Programming the temperature settings.

Press once
You can now set the Timer ON temperature using the Up/Down
arrow keys.

Press again
You can now set the Timer OFF temperature using the Up/Down
arrow keys.

17

18

Programming the Switching Times

You can program 4 switching for the weekday and 4 different
switching times for the weekend.

To do this follow the steps below;
Press three times.

You can now enter the 1st Timer On setting
Press M
You can now enter the 1st Timer Off setting

You can repeat this for the remaining switching times for the week
and weekend. For unused switching times, set --.--

Press to store or wait 30s and the setting will be stored
automatically.

Manual Override

Pressing the M button will override the current state of the timer. If
the thermostat is in a Timer On condition, pressing M will override
the thermostat into Timer Off mode and vice versa.

19

Cooling Mode

In cooling mode, there is a single temperature setting and four
switching times for the weekday and 4 different switching times for
the weekend.

Programming the cooling temperature setting.

Press once
You can now set the cooling temperature using the Up/Down arrow
keys.

Press to store or wait 30s and the setting will be stored
automatically.

Programming the Switching Times

You can program 4 switching for the weekday and 4 different
switching times for the weekend.

Press twice
You can now enter the 1st Timer On setting
Press M
You can now enter the 1st Timer Off setting

Repeat this for the remaining switching times. For unused switching
times enter --.--Press to store or wait 30s and the setting will be
stored automatically.

Auto Heating & Cooling

In Auto mode, there are two temperatures for heating and a single
temperature for cooling. Four switching times for the weekday and 4
different switching times for the weekend can be programmed.

Heating Timer ON temperature: During a switching time, this
temperature setting is maintained.

Heating Timer OFF temperature: When the thermostat is not in a
programmed switching time, the thermostat will maintain this
temperature to protect the building against frost.

Cooling temperature: During a programmed switching time, should
the room temperature rise above the programmed cooling set
temperature, the cooling output is activated.

Note: In this mode, the deadband setting is used. The minimum
deadband setting is 02 which means the lowest cooling temperature
is 02°C above the heating set temperature. The deadband is
adjustable between 02-10.

20

21

Programming the temperature settings.

Press once
You can now set the Heating Timer ON temperature using the
Up/Down arrow keys.

Press again
You can now set the Heating Timer OFF temperature using the
Up/Down arrow keys.

Press again
You can now set the Cooling temperature using the Up/Down arrow
keys.

Press to store or wait 30s and the setting will be stored
automatically.

22

Programming the Switching Times

You can program 4 switching for the weekday and 4 different
switching times for the weekend.

Press four times
You can now enter the 1st Timer On setting
Press M
You can now enter the 1st Timer Off setting

Repeat this for the remaining switching times. For unused switching
times enter --.--Press to store or wait 30s and the setting will
be stored automatically.

Enabling Keylock

The thermostat has a keylock facility. To enable this press the
and “Down” arrow key for 10 seconds.

When the keylock function has been activated, you will see
on screen.

To cancel, repeat the steps above.

NEUTRAL

LIVE

HEAT

COOL

HIGH

MEDIUM

LOW

NEUTRAL

LIVE

HEAT

COOL

HIGH

MEDIUM

LOW

NEUTRAL

LIVE

HEAT

COOL

HIGH

MEDIUM

LOW

HEAT

COOL

HIGH

MEDIUM

LOW

HEAT

COOL

HIGH

MEDIUM

LOW

HEAT

COOL

HIGH

MEDIUM

LOW