SECURE E7 Quartz Water Heating Control Installation Guide
- June 6, 2024
- SECURE
Table of Contents
SECURE E7 Quartz Water Heating Control
Installation instructions
The E7 Quartz is an Electro-mechanical water heating control, which can be set to take advantage of cheap night-rate electricity, so that there is a tank of hot water available for the morning.
INSTALLATION AND CONNECTION SHOULD ONLY BE CARRIED OUT BY A SUITABLY QUALIFIED PERSON AND IN ACCORDANCE WITH THE CURRENT EDITION OF THE IET WIRING REGULATIONS.
WARNING : ISOLATE MAINS SUPPLY BEFORE COMMENCING INSTALLATION ENSURE THE UNIT IS PROPERLY EARTHED.
The E7 Quartz is supplied with it’s own surface mounting box, which can also be mounted over a single or double gang flush wall box. It should NOT be mounted on an unearthed metal surface. Means of disconnection from the supply having at least 3mm contact separation in both poles must be incorporated in the fixed wiring.
We recommend a separate fused circuit from the consumer unit (24 Hour supply) protected by a 15 amp HRC fuse or, preferably a 16 amp MCB. In some cases immersion heater failure can damage the E7 Quartz. Installation of a 100 mA RCD will provide additional protection for the unit. If the E7 Quartz is to be connected to a ring main then the spur feeding the controller should be protected in the same way.
Mounting
The E7 Quartz should be removed from the mounting box by unscrewing the 2 captive screws securing the unit to the mounting box.
Conduit Box Mounting
Use either holes marked ‘A’ in Fig.1 to secure to a single gang box, or the two holes marked ‘C’ for a double gang box. Cable entry is through the cut-out between the 2 fixing holes ‘A’
Surface Mounting
Use the two holes marked ‘B’ in Fig.1 Cable entry is through the most appropriate cut-out
Connections
Use a three-core cable with a minimum conductor size of 1.0mm for a 2kW heater, or 2 1.5mm for a 3kW heater to connect the unit to the supply. Connect the incoming wires to the terminal block as follows;
TERMINAL1 – LIVE in
TERMINAL2 – NEUTRALin
TERMINAL3 – NEUTRAL(s) out to immersion heater(s)
TERMINAL4 – LIVE out to Boost immersion heater
TERMINAL5 – LIVE out to Off-Peak immersion heater
Clamp all surface wiring adjacent to the box or use trunking where
appropriate. Secure the heat resistant flexible cords from the immersion
heaters using the cable clamp in the box
Single Element Immersion Heaters
The 3 core flexible cord should be heat-resistant and rated to 85°C.TERMINAL 4 (Boost live output) should be connected to TERMINAL 5 (Off-Peak live output) and to the immersion heater. The Neutral connection should go to TERMINAL 3 and the Earth connection to the EARTH TERMINALS.
Dual Element Immersion Heaters
The elements should be controlled through separate thermostats. In practice the thermostat for the top short element is usually set 5-10°C less than the thermostat for the long Off-Peak element. The 3 core flexible cords should be heat-resistant and rated 85°C. TERMINAL4 (boost live output) should be connected to the short element and TERMINAL 5 (Off-Peak live output) to the long element. The Neutral connections should go to TERMINAL3 and the Earth connection to the EARTH TERMINALS
Twin Immersion Heaters
The thermostat for the top immersion element should be set lower than the thermostat for the bottom immersion heater. The 3 core flexible cords should be heat-resistant and rated 85°C. TERMINAL 4 (boost live output) should be connected to the top immersion heater and TERMINAL 5 (off-peak live output) to the bottom immersion heater. The two Neutral connections should go to TERMINAL 3 and the Earth connections to the EARTH TERMINALS
When wiring is complete ensure that all terminal screws, including the earth terminal screws are securely tightened to achieve a minimum torque of .75Nm.
Adjusting The Off-Peak Time Period
After removing the mechanism from its pack, removing the fixing screws, heck
the OffPeak time period. (The Off-peak switching times are available from the
supplying Regional Electricity Company.) If necessary this can be adjusted as
detailed below. Ensure that the Timeswitch is not connected to the mains
supply.
The adjustable dial has been designed so that the ON and OFF time cams can be
set between11:30pm and 9:00am in steps of 15 minutes.The cams can be set
between the minimum setting of 4½ hours to maximum of 7 hours.
The cams will have been pre-set on production, if a different time setting is
required the cams should be adjusted before installation. All adjustments are
made from the back of the front cover
First, rotate the dial until the Orange ON cam is visible (See diagram). Locate a screwdriver in the slot and press cam away from the underside of dial. Because of the stops the Blue OFF cam may have to be re-positioned before the ON cam can be set. The cam can now be positioned at the desired time, by sliding it clock-wise or anticlockwise on the dial. Through the clear panel located on the face of the dial you can observe the position of the cam. Removing the screwdriver will automatically lock the cam in position. Both the Blue and Orange cams are set with a similar operation
Completing The Installation
To assemble the controller to its mounting box first push the connectors numbered 1 – 5 into the corresponding numbered terminal as shown in Fig.1
Carefully offer the controller to the box and secure with the fixing screws, ensuring the wiring does not become damaged. Switch on the mains supply, put the rocker switch in the TIMED position.The battery requires charging before the clock will rotate, this can take up to 15 minutes.
Questions and Answers
On installation the clock does not rotate| The battery requires charging
before the clock will rotate, this can take up to 15 minutes.
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How do i know if it is still under warranty?| E7 Quartz comes with a 2 year
guarantee from the date of manufacture. This date is located on the rear of
the unit, indicated by a month over a year. The E7 Quartz must only be removed
from it’s backbox by a qualified electrician.
How long will the battery back-up last on E7 Quartz?| The battery will
continue the clock rotating for 150 Hours and will be recharged when the mains
power supply is restored.
Specification
13A 230V AC 50Hz
Electro-Mechanical
Suitable for immersion heaters up to 3kW
Live Parts – Enclosed
Dirt protection – Normal situation
Moisture protection – Ordinary
Operating Temperature – 0 – 35° C
Shock protection – Class 1
Contacts – Micro-disconnection
Battery reserve – 150 Hours
Size – 170mm x 115mm x 56mm (excluding rocker switch)
Secure Meters (UK) Ltd Secure House, Lulworth Close, Chandlers Ford,
Eastleigh, SO53 3TL, UK
t: +44 1962 840048 f: +44 1962 841046
www.securemeters.com
Part Number P82132 Issue 7
Documents / Resources
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SECURE E7 Quartz Water Heating
Control
[pdf] Installation Guide
E7 Quartz Water Heating Control, E7, Quartz Water Heating Control
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Read User Manual Online (PDF format)
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