Heatmiser JG PRT-E User manual
Operating Instructions
Model:
JG PRT-E
This is a multi mode thermostat,
please see page 13 for setup instructions
Revision 1 - 10/09
Ref: JGPRT-E
1
Contents Page
What is a programmable thermostat? 2-4
Installation 5-6
Icons explained 6
Temperature Display 7
Setting the Clock 7
Setting the Comfort Levels 8-9
Keypad Lock Facility 9
Temperature Hold 10
Setting the Temperature 10
Holiday Feature 11
Turning the Heating On/Off 12
Factory Reset 12
Setting the Mode 13
Optional Thermostat Settings 14-19
Wiring 20-21
2
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” 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 heat up depends on the design of the heating system,
the size of the boilers and radiators.
Neither does the setting affect how quickly the room cools
3
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 nd the lowest temperature settings that you are
comfortable with at the different times you have chosen, and
then leave it alone to do its job.
The way to set and use your programmable room thermostat is
to nd the lowest temperature setting 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 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 you 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
4
(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 changes
between Greenwich Mean Time and British Summer Time.
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 ow of air to
sense the temperature, so they must not be covered by
curtains or blocked furniture. Nearby electric res, televisions,
wall or table lamps may prevent the thermostat from working
properly.
5
Installation Procedure
Do’s
1. Do mount the thermostat at eye level.
2. Do read the instructions fully so that you can get the best
from our product.
Don’ts
1. Do not install near a direct heat source as this will affect 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 ush 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 at head terminal driver in to the
slots on the bottom face of the thermostat.
6
Step 2
Place the thermostat front somewhere safe. Terminate the
thermostat as shown in the diagrams at the back of this
booklet.
Step 3
Clip the front of the thermostat to the back plate.
Icons Explained
Symbol Description
Heat On Icon
Shown when the heating is On
Flashing when the optimum starts is in operation
Frost On Icon (Heating Off)
Shown when the heating is switched off and is
protecting against frost only
Keylock Icon
Shown when the keypad is locked
Floor Set Temperature Icon
Shown when the floor set temperture is reached
7
Temperature Display
Room Temp = This is the current room temperature.
SET = This is the temperature you are trying to achieve in your
home.
Setting the Clock
To set the clock, follow the steps below:
• With the thermostat turned on, press the Clock button twice.
• You are now able to set the minutes using the Up/Down
keys.
• Press H to accept.
• You are now able to set the hours using the Up/Down keys.
• Press H to accept.
• You are now able to set the day of the week using the Up/
Down keys.
• Press A to store and exit.
8
Comfort Levels Explained
The PRT-E provides Weekday/Weekend or 7 Day Programming.
You should consult the “Conguration Menu” section to select
the required mode.
The thermostat is supplied with comfort levels already
programmed, but these can be changed easily. The default
times 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 --.--
• To begin programming the comfort levels, press Clock Once.
• If your thermostat is setup for Weekday/Weekend
Programming, you will see Mon-Fri shown. For 7 day
programming you will see Monday.
• Using the Up/Down arrow keys, enter the required Wake
time.
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