Secure Horstmann Electric E7+ Quick Installation and Operation Guide

Tools

Included tools: Screwdriver, Drill, Pliers

CAUTION: Installation and connection should only be carried out by a suitably qualified person in accordance with the current edition of the IET wiring regulations.

Safety Precautions:

• E7+ should be mounted approximately 1.5 metres above floor level, in 'free space', away from sources of heat or electrical interference.
• Means of disconnection from the supply having at least 3 mm contact separation in both poles must be incorporated in the fixed wiring.
• Secure recommends a separate fused circuit from the consumer unit (24 Hour supply) protected by a 15 amp HRC fuse or, preferably, a 16 amp MCB.
• Installation of a 100 mA RCD will provide additional protection for the unit.

Installation (New)

1. Unscrew the screws.
2. Take out the front cover.
3. Cable entry options: Remove the suitable cable entry cutout before fixing the box. Take care to remove sharp edges.

Retrofit Installation

1. Unscrew and open the front cover.
2. Remove all five lugs and scrap the old front cover.
3. Remove both the screws on the front cover.
4. Route the wires: Place the adaptor plate on the front cover.
5. Fit the front cover: Tighten both screws (Torque 0.8 to 1 Nm).

Note: The supplied Adaptor plate is ONLY required when retrofitting the E7+ onto an existing Electronic 7 or Economy 7 quartz back box.

Note: Scrap the wallbox adhering to local regulations.

Mounting Options

Select the most appropriate mounting option:

• A - Single gang box
• B - Double gang box
• C - Surface mounting

Connection Diagram and Cable Details

Use a three-core cable with a minimum conductor size of 1.0mm for a 2kW heater, or 1.5mm for a 3kW heater to connect the unit to the supply.

Connect the incoming wires to the terminal block as follows:

• TERMINAL 1 - LIVE in
• TERMINAL 2 - NEUTRAL in
• TERMINAL 3 - NEUTRAL(s) out to immersion heater(s)
• TERMINAL 4 - LIVE out to Boost immersion heater
• TERMINAL 5 - 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.

Wallbox Connections:

• Terminal 5:4321
• Live
• Neutral
• Boost
• Off-Peak
• Earth

Note: Link terminals 4 and 5 when using a single immersion heater.

Connection with Immersion Heater(s)

A - Single immersion heater

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. The thermostat for the top (short) element is usually set 5-10°C less than the thermostat for the long Off-Peak element.

B - Dual 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 short element and TERMINAL 5 (Off-Peak live output) to the long element. The Neutral connections should go to TERMINAL 3 and the Earth connection to the EARTH TERMINALS.

C - Twin immersion heater

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.

Note: Refer connection diagram in section 5.

Making Connections

1. Make connections: Insert the lugs according to the numbering and tie the wires using the cable tie.
2. Connect wires from the mains and tighten the screws (Torque 0.6 to 0.8 Nm).
3. Tie the wires using a cable tie (Recommended).

Fitting the Cover

Fix the cover and tighten both the screws (Torque 0.8 to 1 Nm).

Wi-Fi Module

Insert the Wi-Fi module (if required). The Wi-Fi module requires a 802.11 B/G/N, 2.4 GHz wireless router with internet connection.

Power Up and Settings

1. Power up the device and select day light saving option.

Daylight Saving Options:

• GMT/BST: Switching time will be changed by one hour. In the GMT/BST mode the clock display will match the actual switching time.
• GMT Only: Switching will always take place at GMT times (summer and winter). The clock display will tell the correct time of day.

Note: If connection is to be made where a 2-Rate electricity meter is controlled by a Radio Teleswitch or other equipment which control tariffs remotely or seasonally, it is essential that before setting the commissioning switch you find out how the off-peak times are controlled. The Customer Service Centre of your Electricity Supplier will confirm information regarding Off-Peak electricity timing and the switching method used for your area. On installations where the 2-Rate electricity meter is controlled by a mechanical Tariff Time switch the commissioning switch should be set to GMT ONLY.

Home Screens

One of the following screens will appear on power up. The Wi-Fi symbol appears only when E7+ is connected to the Wi-Fi network.

• Off-Peak
• Boost
• Timed Boost

Buttons

Default Schedule (Monday to Sunday)

Note: The default schedule can be modified.

Technical Specifications

Electrical

• Number of relays: 2
• Contact rating: 230 V ± 10%AC, 47.5 - 52.5 Hz
• Contact type: Micro-interruption
• Switch type: Contact
• Supply: CAT II
• Insulation category: Class A
• Clock: 12/24 hours
• Programme selection: Off-Peak - upto 3 on/off time periods, programmable boost and 30 minutes, 1 hour & 2 hours manual boost
• Radio: Enclosed
• Operating frequency: 2.4 GHz
• RF range: ~60m, line of sight

Mechanical

• Dimensions: 102 mm x 165 mm x 54 mm (W*L*H)
• Weight: 425 gms (approx)
• Case material: Thermoplastic, flame retardant
• Mounting: Wall mounting

Environmental

• Impulse voltage rating: Cat II 2500V
• Enclosure protection: IP30
• Pollution degree: Degree 2
• Operating temperature range: 0°C to +35°C
• Storage temperature: -20°C to +70°C
• Environmental humidity range: 0% to +95% relative humidity
• Product life warranty: 7 years

Compliance

• Product standards: EN 60730-2-9, BS EN 60730-1
• RED radio: ETSI EN 300 328
• RED EMC: ETSI EN 301 489-1, ETSI EN 301 489-17

About Secure

Secure Meters (UK) Ltd

Secure House, Lulworth Close, Chandlers Ford, Eastleigh, SO53 3TL, England

Website: www.securemeters.com