FLEXIHEAT EIWH36 Electric Instantaneous Water Heater User Manual

FLEXIHEAT EIWH36 Electric Instantaneous Water Heater

Specifications

• Product : Electric Instantaneous Water Heater 36kW Instant water heater with electronic control
• Power: 36kW Designed for wall mounting
• Recommended water inlet pipe size: G1/2
• Must be installed by a three-phase installation professional

Product Usage Instructions

Installation

1. Place the heater in the desired location following proper standards.
2. Connect water pipes ensuring cold water inlet on the right side and hot water outlet on the left side.
3. Remove the case and disconnect the plug-in connector.
4. Fix the heater on the hooks after inserting the supply wire through the hole.
5. Connect electric supply wires and water system.
6. Flood the heater with cold water to check for leaks.
7. Activate safety switch during the first connection.
8. Securely fix the case.
9. Ensure no access to live parts through back plate holes.

Venting

1. Cut off electric supply.

2. Turn on the hot water tap to vent for about 15-30 seconds until
   the water flow stabilizes.

3. Switch the power supply back on.

Operation

The heater activates automatically when the flow rate exceeds 2.5 l/min. The temperature control system adjusts heating power based on flow rate, temperature setting, and mains water temperature. The front case has indicators for different modes.

FAQ

• Q : What should I do if the safety switch is triggered during operation?
• A: Contact the service immediately. Do not attempt to switch on the safety switch again as it may pose a danger and cause damage to the heater.

This appliance must not be used by children and by persons with reduced physical, sensory, or mental capabilities or lack of experience and knowledge about the product. Any user must be given supervision or instruction concerning the safe usage of the appliance and that they are aware of potential dangers that might result from the usage of the appliance. Children should not play with the device. Unqualified persons should not complete any cleaning Safety instructions or maintenance procedures on this water heater

Safety instructions

1. Read and strictly follow the installation and operating instructions to ensure a long life and reliable unit operation.
2. The unit is designed to be wall-mounted.
3. A non-return valve must not be installed on the cold water supply pipe.
4. The unit should be installed close to the most frequently used tap.
5. Inlet and outlet pipes should not be made of plastic.
6. It’s recommended to install an isolating valve and water filter on the water inlet pipe.
7. The unit can only be used when in perfect technical condition and correctly assembled.
8. The unit should always be vented before initial start-up. Vent the unit each time after the water has been emptied from the heater or pipes (e.g. when the water supply system has been repaired or maintained).
9. Connection to the mains and measurement of fire protection effectiveness should be made by a qualified person.
10. The unit has to be earthed or neutrally grounded.
11. The unit must be permanently connected to the mains which is equipped with earth clamp.
12. The unit must not be installed in a place that is exposed to the danger of explosion and a place in which the temperature may go down below 00C.
13. The unit must be kept in a place in which the temperature never goes down below 00C (there is water inside the unit).
14. Do not use when the water has been emptied from the unit or pipes (e.g. when the water supply system has been repaired or maintained).
15. The unit’s cover must not be taken off while power is on.
16. Accumulation of limescale in parts of the water heater may cause limited water flow and failure of the water heater. Failure of the heater and damages caused by the limescale will not be covered by the warranty. The water heaters and fittings must be descaled on a regular basis, the frequency of limescale removal depends on the quality of water.
17. Appropriate precautions must be taken while using hot water. The temperature of water over 400C may cause hot feelings and can be dangerous for children.

Installation – AsseAmbly

1. Bring to the place where the heater is to be situated, three-phase installation, in accordance with proper standards.
2. Bring water pipes to the marked places, keeping in mind that the cold water inlet is on the right-hand side (G1/2”), the hot water outlet is on the left-hand side (G1/2”).
3. Remove the case and disconnect the plug-in connector [NAST].
4. Fix the heater on the fixing hooks after inserting the supply wire through the hole.
5. Connect electric supply wires and connect the heater to the water system.
6. Flood the heater by letting cold water in (allow mains pressure to get to the appliance) and check the connection for leaks.
7. During the heater’s installation, check the activation of safety switch (only applies to the first connection of the device).
8. Fix the case.
9. Make sure that there is no access to live parts through the holes at the back plate.

Safety temperature limiter

• a) – to switch it on
• b) – limiter “switched on”

Attention! In the event of a safety switch being triggered during operation, please contact the service.\Switching on the safety switch again and continuing to use the device may cause danger and serious damage to the heater.

Venting

1. Cut off electric supply.
2. Turn the hot water tap on for the period of venting the installation (about 15-30 seconds) until the flow of water becomes constant and even.
3. Switch the power supply on.

Operation

The heater switches on automatically straight after reaching a flow rate over 2.5 l/min. The temperature control system selects an appropriate heating power depending on the rate of flow, temperature setting (set with the use of a knob on the front case) and the temperature of water in the mains. There are two indicators on the case:

• green – power supply “on”, red – heating “on”.

Other modes are shown by flickering green light.

Number of impulses

(green indicator)

|

description

---|---

1

| The unit was switched off because the temperature exceeded the maximum value (the fault signal will not disappear until the appropriate rate of water flow is reached).
2| The unit was switched off by a master appliance.
3| The inlet temperature sensor failure.

The heater is factory set at NORMAL mode (30 – 60ºC). Change of the modes can only be done by authorized service.

Faults

If the following signals of faulty work are noticed, check for possible reasons:

Faultw

|

Reason

---|---

if the indicators on the case are off

|

the plug-in connector is not properly inserted [NAST],

there is a failure of power supplies,

if the heating is weak or it does not heat at all|

there is a failure of power supplies,

if the flow rate is not sufficient|

The regulating valve has been incorrectly adjusted.

Repairing the above is not covered by the warranty. If the heater breaks down (and it is caused by none of the above reasons) you need to contact the distributor/seller.

Technical data

EIWH36 Electric instant water heater

Flow rate (at Δt = 30°C and water pressure

@ 6 Bar)

| l/min| 17.3
Maximum water flow rate| l/min| 22

Temperature range set by knob

| NORMAL mode| °C| 30 to 60
SHOWER mode|  | 30 to 55
Overall dimensions| mm| 492 x 315 x 140
Weight| kg| 9.1
Fuse rated current| A| 63
Connecting wires section| mm2| 4 x (10 ÷ 25)
Safety class|  | IP 24
The maximum allowed network impedance| Ω| 0.09
Water inlet and outlet section|  | G 1/2” (distance between

inlet and outlet 166mm)

Used products can’t be treated as general communal waste. The disassembled appliance has to be delivered to the collection point of electrical and electronic equipment for recycling. Appropriate utilization of used products prevents potential negative environmental influences that may occur as a result of inappropriate handling of waste. In order to get more detailed information about recycling this product you should contact the local government unit, waste management service, or the shop where this product has been purchased.

CONTACT

• www.flexiheatuk.com
• 01202 822221

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