Product Guide
E8210
E8210/24V
today, tomorrow and in the future
mselectronics.co.uk
Set-Back/Set-Forward Thermostat
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Issue 1.0
Product Overview
The E8210 thermostat combines the functionality of a standard set-back thermostat with a set-forward
thermostat all in a single wall-plate style of unit. This gives the end-user the ability to select between
1 of 3 dierent xed temperature levels (Low, Med, High) to allow greater end-user control when
compared to a set-back thermostat, but its tamperproof features prevent unauthorised modication of
the temperature setpoints.
The medium level temperature setpoint (“Med” mode) is adjustable between +12°C and +26°C while
the “High” and “Low” modes are adjustable between 0°C and 7°C above and below the “Med” setpoint.
The end-user is able to select between these 3 modes via the touch-sensitive pushbutton. LED
indicators on the front plate illuminate to display which mode the thermostat is operating in.
All setpoints are combined with an adjustable temperature hysteresis (dierential) which is adjustable to
anything between 0.25°C and 4°C.
Product Wiring
1. Power to the thermostat is provided via the 2-way terminal block.
• Product codes without any sux are mains powered using the terminals labelled L and N
(230V AC, 50Hz).
• Product codes with the “/24V” sux are 24V powered using the terminals labelled 24V (24V
AC or DC).
2. A voltage-free changeover relay output capable of switching loads of up to 10A, 250V AC (resistive)
is provided by the thermostat at the “NC, COM, NO” terminals.
3. The Common “COM” terminal is connected to the Normally Open “NO” terminal when the sensed
room temperature is above the selected temperature.
4. Conversely, it is connected to the Normally Closed “NC” terminal when the room temperature is
sensed to be below the selected temperature.
Figure 1 Typical wiring example
Ensure the electrical supply is isolated before making any connections or adjustments.
!
All electrical installation and maintenance must be carried out by a competent person. If in doubt, consult a
qualied electrician. Any new wiring must be carried out by qualied personnel in accordance with the current
edition of the IET Wiring Regulations (BS7671), or those specically applicable to your area.
!
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Issue 1.0
Installation
1. The unit is designed to be mounted in any single-gang British Standard pattress box (surface or ush
mounted) which has a minimum internal depth of 20mm.
2. Ensure best-practices are used when choosing a location for the thermostat so that optimal thermostatic
control is achieved. Do not mount near drafts, heaters, radiators, air conditioners, in direct sunlight or
any other place where the sensed temperature may be unnaturally inuenced. A good mounting height
is typically between 1m and 2m from the oor.
3. Connect the wiring as shown in Figure 1 (or any suitably appropriate form) via the screw-terminals.
Make sure to choose the correct output terminals that are suitable to your application.
4. Adjust the internal thumbwheels to suit the desired operational requirements (see below).
5. Ax the thermostat to the pattress box using the supplied M3.5 raised-countersunk screws then nally
insert the screw-caps for a neat nish.
6. The screw caps may be removed without damage using a sticky putty such as blu-tack.
Operation
1. Adjust the setpoint (“Setpoint”) dial to the temperature the room is to be regulated to in the ‘Med’ mode
(typically 20ºC).
2. Adjust the set-back/set-forward (“S’Bck/S’Fwd”) dial to the number of °C either side of the ‘Med’
temperature that the ‘Low’ and ‘High’ temperatures are to be (typically 2°C).
3. Set the dierential (“Di.”) to the total temperature swing either side of the resulting setpoint that the
room temperature is required to keep within (typically 1°C).
4. Example set-up:
Setpoint set to 20ºC, Dierential set to 1ºC, Set-Back/Set-Forward set to 2°C.
Low mode - The unit will maintain the temperature between 17.5ºC and 18.5ºC
Med mode - The unit will maintain the temperature between 19.5ºC and 20.5ºC
High mode - The unit will maintain the temperature between 21.5ºC and 22.5ºC
Technical Specication
Power supply:
220V - 240V AC 50Hz (live/neutral)
22V - 26V AC or DC [/24V variant only]
Output switch rating: 10A, 250V AC 50Hz (resistive)
Output switch type: Changeover relay (volt-free)
Temperature control:
[Med setpoint]: +12°C to +26°C
[Low/High setpoint]: 0°C to 7°C below/above the Med
setpoint
Temperature dierential: 0.25°C to 4°C
Sensor drift: 0.15°C over 5 years
Guarantee: 5 Years
Weight: 90g
Dimensions mm: 86mm x 86mm x 27mm
Product Accessories
MSD-154 M3.5 tamperproof screws
MSD-155 Tamperproof screwdriver for MSD-154 screws
Ensure the electrical supply is isolated before making any connections or adjustments.
!
Ensure the electrical supply is isolated before making any connections or adjustments.
!
Notes
1. Applying power for the rst time: The output of the thermostat may not switch in response to temperature for
up to 60 seconds after rst powering on. This is normal behaviour due to a necessary initialisation phase - please
wait until this is completed before attempting to test the thermostat. Normal operation will resume as soon as the
initialisation phase has completed.
If the unit has already completed initialisation then short interruptions of power of up to 5 minutes will not trigger the
initalisation phase and the humidistat will resume normal operation immediately within a couple of seconds. Power
interruptions longer than 5 minutes may trigger the initialisation phase again.
e: info@mselectronics.co.uk
t: 0333 666 1176 f: 0333 666 1436
mselectronics.co.uk
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MS Electronics reserves the right to alter or change this specification without prior notice.
IMPORTANT INSTALLATION NOTICE
The installation of this product should be carried out in accordance with the latest IEE wiring
regulations and all wiring completed by a qualified electrician.
Technical Support
For further help or information on this and the other products in the MS Electronics range
visit www.mselectronics.co.uk or call 0333 666 1176.
Alternatively, email techsupport@mselectronics.co.uk
Additional copies of this product guide can be downloaded from our website.
Product Warranty
MS Electronics guarantees all their products against manufacturing defects for
5 years from the purchase date. If your product is found to be faulty, MS Electronics will,
at their discretion, repair or replace the product free of charge.
Note
Any modification or damage to the outer casing of the product, as well as any
damage to the product due to abuse or incorrect wiring may invalidate the guarantee.
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