STIEBEL ELTRON EVS15 Bedienungsanleitung

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Service Manual

EVS15, EVS30, EVS50, EVS80, EVS100, EVS150

Author: Mr. Pornpawit Pumyaem

Date: 24 June 2016

Revision: version 1

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Warning

Warning: This service manual is suitable for qualified Technician only.

Warning: Disconnect power supply before open cover.

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Table of Content



General Product 









1.Heating Elements 

2.Thermostat 

3.Thermo cut out Checking

4.Anode 



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General product information

The EVS 15-150 unvented (pressurized) wall-mounted water heater can heat potable water up to

about EVS 15-150 = 75°C to suit demand and supply a number of draw-off points. The water content is

automatically heated to the preset temperature. The device is adjusted at the works to 75°C.

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Technical data

Model

EVS15

EVS30

EVS50

EVS80

EVS100

EVS150

Type

Outlet pressure

0.7 Mpa (7 bar)

Water Connector

G 1/2"

Power Supply

1/N/PE AC 220-240V

Rated frequency

50-60 Hz

220 V

1.5

2.0

230 V

1.63

2.18

240 V

1.78

2.38

Cable Size (Sq.mm)

2.5-4

Circuit Breaker (A)

Thermal cut out (TCO)

Manual Reset ( 93°C +2°C / -5°C )

Thermostat

30°C to 75°C

Insulation layer

Polyurethane

Anode

Magnesium stick

Dimension (mm)

Ø305x543

Ø365x611

Ø390x745

Ø460x 740

Ø460x880

Ø460x1230

Unit weight (kg)

10.8

12.6

17.1

23.3

27.6

37.9

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Wiring Diagram

A = Heating element

B = Thermostat

C = Thermal Cut - Out (TCO)

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Troubleshooting

Problem & Condition

Cause

Correction



And water not hot

- No power supply to unit

- Check breaker

- Power line loose at contact

points

- Check connection points and fix

- Thermal cut-out (TCO)

- Reset Thermal cut out

- Check Thermostat

Power lamp "ON"

But water not hot

- Heating element broken

- Check heating elements

Power lamp not "ON"

But water Hot

-LED broken

- Change the new LED

Breaker cut-off

(Main breaker)

- Overloaded current on main

breaker

- Turn off other appliances

- Power line wrong connection

- Replace main breaker

- Reconnect power line L, N, G

Water leak

- Connector has loosen

- Tight connectors or change

rubber seal

- Wrong installation

- Reinstallation

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Cause Analysis

1. Heating Elements Checking

Definition: Heating element is a metal coil that heats up to high temperatures when electricity

is applied.

-Disconnect cables to the elements.

- Set Multi )))) 

Check

Meter Result

Cause

Action

Pole-Pole

"Beep" signal " )))) "

Pass

No action

No signal "OL" or (

Element Broken

Change New Heater

Pole-Case

"Beep" signal " )))) "

Element Broken

Change New Heater

No signal "OL" or (

Pass

No action

Remark: "OL" = Over Load For Digital multimeter

And "For Analog multimeter

Pole -Pole

Pole -Case

Case

Pole

Pole 1

Pole 2

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2.Thermostat Checking

Definition: A thermostat is a component which senses the temperature of a system so that the

system's temperature is maintained near a desired set point.

- Disconnect cables as in the picture.

- Set Multi )))) " and check on poles.

-Position ON

Check

Meter Result

Cause

Action

Pole - Pole

"Beep" signal " )))) "

Pass

No action

No signal "OL" or (

Connector open

Change new one

-Position OFF

Check

Meter Result

Cause

Action

Pole - Pole

No signal "OL" or (

Pass

No action

"Beep" signal " )))) "

Connector open

Change new one

Power

ON Min. Power

Max. Power

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3.Thermo cut-out Checking

Definition: The thermal cut out is a sensor with a closed circuit (NC). It will automatically cut out

power system when the water in tank up to 93 

C. To check the thermal cut out, follow the

steps below.

- Disconnect cables as in the picture.

- Set Multi )))) " and check on poles.

P1-P2 P3-P4

Check

Meter Result

Cause

Action

Pole 1- Pole 2

Pole 3 - Pole 4

"Beep" signal " )))) "

Pass

No action

No signal "OL" or (

Connector open

Reset manual button*

*Note: In case the thermo cut-out cannot reset, it must be replaced.

Manual reset

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