NIBE ELK 26 Electric Heater Installation Guide

: June 3, 2024
: NIBE

NIBE ELK 26 Electric Heater

NIBE-ELK-26-Electric-Heater-PRODUCT

Important information

SAFETY INFORMATION

This manual describes installation and service procedures for implementation by specialists. The manual must be left with the customer. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

This is an original manual. It may not be translated without the approval of NIBE. Rights to make any design or technical modifications are reserved.

©NIBE 2021.

SYMBOLS

NOTE : This symbol indicates danger to person or machine
Caution: This symbol indicates important information about what you should consider when installing or servicing the installation.
TIP: This symbol indicates tips on how to facilitate using the product.
MARKING: Explanation of symbols that may be present on the product’s label(s).
Danger to person or machine.
Read the Installer Manual.
SERIAL NUMBER: The serial number can be found on the type plate on the side of ELK 26.
Caution: You need the product’s (14 digit) serial number for servicing and support.

RECOVERY

Leave the disposal of the packaging to the installer who installed the product or to special waste stations. Do not dispose of used products with normal household waste. It must be disposed of at a special waste station or dealer who provides this type of service. Improper disposal of the product by the user results in administrative penalties in accordance with current legislation. NIBE

General

ELK 26 is an electric heater that can be used to supplement the heating capacity of your NIBE climate unit. When the heating demand is greater than the climate unit’s capacity, the electric heater connects automatically. The electrical equipment is adapted to the climate unit’s function. The stainless steel electric coils and electric boiler tube are made of acid-resistant steel (SIS 2333), which gives a very good service life. ELK 26 contains a temperature limiter and contactors to enable external control of the power.

COMPATIBLE PRODUCTS

NIBE-ELK-26-Electric-Heater-FIG-1

Connection is different depending on which product ELK 26 is to be used with.

These products can be connected directly to ELK 26

F1345
F1355
SMO 20
SMO 40
SMO S40

These products require the accessory AXC 40

S-series

S1155
S1255
VVM S320

F-series

F1145
F1155
F1245
F1255
VVM 225
VVM 320

VVM 310 requires the accessory DEH 310. VVM 500 requires the accessory DEH 500.

CONTENTS

1 x Electric heater

ASSEMBLY

The electric heater must be installed upright (see image below). A free space of 800 mm in front of the water heater is required to carry out servicing. If this is not possible, detachable connections must be used.

COMPONENT POSITIONS

NIBE-ELK-26-Electric-Heater-FIG-2

Component list

EB1: Immersion heater
FC1: Miniature circuit-breaker
FQ10: Temperature limiter
X1: Terminal block, incoming
X2: Terminal block
QA1: Contactor 4.0 kW (-K1)
QA2: Contactor 7.0 kW (-K2)
QA3: Contactor 15.0 kW (-K3)
QA41: Contactor, overheat protection (-K4)
BT30: Emergency mode thermostat
XL1: Connection supply line, G 32
XL2: Connection return line, G 32
UB1, UB2: Cable gland
QM60: Venting
PZ1: Type plate/Serial number plate

Designations according to standard EN 81346-2.

Pipe connections

GENERAL

The pipe installation must be carried out in accordance with applicable standards. A circulation pump must be used to ensure the flow over the immersion heater. If the heating system valves can close the circulation completely, the bypass valve must be installed so that the flow through the electric heater does not stop. In closed installations an approved safety valve and pressure expansion vessel must be used.

Caution: Also see the installer manual for your heat pump/indoor module.

NOTE: The pipe work must be flushed before the electric heater is connected, so that any contaminants do not damage the component parts.

DRAINING

The system is most easily drained by installing a drainage valve at the lowest point on the pipe installation. The remaining water in ELK 26 is drained through the return line connection (XL2), see “Component location” on page 17. If the return line connection on ELK 26 is normally used for draining the unit, a drain valve can be installed here.

NOTE: The pipe work must be flushed before the electric heater is connected, so that any contaminants do not damage the component parts.

PRESSURE DROP DIAGRAM ELK 26

Pressure drop

NIBE-ELK-26-Electric-Heater-FIG-3

SYSTEM DIAGRAM

NOTE: This is the outline diagram. Actual installations must be planned according to applicable standards.

SYMBOL KEY

NIBE-ELK-26-Electric-Heater-FIG-4

Designations according to standard EN 81346-2.

OUTLINE DIAGRAM

NIBE-ELK-26-Electric-Heater-FIG-5

Electrical connection

NOTE: All electrical connections must be carried out by an authorised electrician. Electrical installation and wiring must be carried out in accordance with the stipulations in force. The climate unit must not be powered when installing ELK 26.

ELK 26 must be installed on terminal block X1 via a circuit breaker with a minimum breaking gap of 3 mm. ELK 26 contains temperature limiter and contactors for external control of the three power stages 4, 7 and 10 kW. The electrical circuit diagram is at the end of this Installer handbook.

ELECTRICAL CONNECTION VERSIONS F1345

F1345 has different electrical connection versions depending on when the heat pump was manufactured. To check which electrical connection applies to your F1345, check the designation “2.0” visible above the right hand side of the terminal block as illustrated.

F1345 2.0 / F1355

Terminal block X1 on ELK 26 is connected to terminal blocks X5, X7 and X8 on the input board AA101 in the heat pump as illustrated.

WITHOUT THERMOSTAT, TWO ACTIVE POWER STEPS

26 kW electric heater step active.

WITH THERMOSTAT, TWO ACTIVE POWER STEPS

26 kW electric heater step active.
15 kW electric heater step active in emergency mode.

F1345

Terminal block X1 in ELK 26 connects to the terminal blocks X2-X4 in the heat pump as illustrated.

WITHOUT THERMOSTAT, TWO ACTIVE POWER STEPS

26 kW electric heater step active.

WITH THERMOSTAT, TWO ACTIVE POWER STEPS

26 kW electric heater step active.
15 kW electric heater step active in emergency mode.

SMO S40

SMO 20 AND SMO 40

Terminal block X1 in ELK 26 connects to the terminal blocks X1 and AA7-X2 in the control module as illustrated.

WITHOUT THERMOSTAT, THREE ACTIVE POWER STEPS

26 kW electric heater step active.

WITH THERMOSTAT, THREE ACTIVE POWER STEPS

S1155, S1255, VVM S320, VVM S325

For connection of ELK 26 to the above products an accessory is required.
See the ”General” section on page 16 to see which accessory is required for your climate unit.
Terminal block X1 in ELK 26 connects to terminal block X9 on the accessory board as illustrated.

F1145, F1155, F1245, F1255, VVM 225, VVM 310, VVM 320, VVM 325 AND VVM 500

For connection of ELK 26 to the above products an accessory is required.
See the ”General” section on page 16 to see which accessory is required for your climate unit.
Terminal block X1 in ELK 26 connects to terminal block X9 on the accessory board as illustrated.

Program settings

Program setting the ELK 26 can be performed via the start guide or directly in the menu system in your compatible heat pump/indoor module.

Caution: Also see the Installer manual for the product that ELK 26 will be connected to.

The start guide appears at the first start-up after installation, but can also be found in menu 7.7 in the S-series and 5.7 in the F-Series.

S-SERIES

SMO S40, S1155, S1255, VVM S320

Information about menu settings for the above products can be found in the manual for AXC 40 or in the main product’s manual.

Menu 7.2.1 – Add/remove accessories
Add or remove accessories here.
Select “Step-controlled additional heat”.

Menu 7.2.6 – Step-controlled additional heat (AXC)

Here you can perform the following settings

Select when the addition is to start.
Set max permitted number of additional steps.
If binary stepping is to be used.

Caution

“Start additional heat” in the menus 7.2.6 (external step-controlled additional heat) and 7.1.10.3 (degree minute settings internal additional heat) are factory set at 400DM. If both of the additional heat options are used and you want to have more steps, the start difference needs to be changed in one of the menus.

Menu 7.5.3 – Forced control

Forced control of the various components in the main product and of any connected accessories.

EB1-AA5-K4: Activating the circulation pump (GP10).
EB1-AA5-K1: Activating additional step 1.
EB1-AA5-K2: Activating additional step 2.
EB1-AA5-K3: Activating additional step 3.
Setting of 0–10 V stepless forced control.

See the ”General” section on page16 to see which accessory is required for your product.

F-SERIES

F1345, F1355, SMO 20 and SMO 40

Menu 4.9.3 – degree minute setting
Here you select when the additional heat is to start and the degree minute intervals.

add. heat in tank
Setting range: on/off
Factory setting, fuse: off
max step
Setting range (binary stepping deactivated): 0 – 3
Setting range (binary stepping activated): 0 – 7
Default value: 3
fuse size
Setting range: 1 – 400 A
Factory setting: 16 A
transformation ratio
Setting range: 300 – 2500
Factory setting: 300

Here you select whether the step controlled additional heat is positioned before or after the reversing valve for hot water charging (QN10). Step controlled additional heat is for example an external electric boiler. Here you can set the max permitted number of additional heat steps and binary or linear stepping. When binary stepping is deactivated (off), the settings refer to linear stepping. If the hot water accessory is available and additional heat location is selected as “after QN10” and additional heat in the tank is selected, the number of steps are restricted to 2 steps linear or 3 steps binary. Output AA7-X2:6 is reserved in this mode for additional heat in the hot water tank.

You can also set the fuse size.

TIP: See the accessory installation instructions for function description.

Activating/deactivating of accessories.
Select: “step controlled add. heat”.
Menu 5.3.6 – step controlled add. heat

Here you can perform the following settings

Select when the addition is to start.
Set max permitted number of additional steps.
If binary stepping is to be used.

Caution: “start additional heat” in the menus 5.3.6 (external step- controlled additional heat) and 4.9.3 (degree minute settings internal additional heat) are factory set at 400DM. If both of the additional heat options are used and you want to have more steps, the start difference needs to be changed in one of the menus.

Forced control of the different components in the heat pump as well as in the different accessories that may be connected.

EB1-AA5-K1: Activating additional step 1.
EB1-AA5-K2: Activating additional step 2.
EB1-AA5-K3: Activating additional step 3.
EB1-AA5-K4: Activating the circulation pump (GP10)

Caution: Linear stepping of ELK 26 is recommended.

F1145, F1155, F1245, F1255, VVM 225, VVM 310, VVM 320, VVM 325 and VVM

500

Information about menu settings for the products above is in the manuals for AXC 40, DEH 310 and DEH 500.

Menu 5.2 – system settings

Activating/deactivating of accessories.
Select: “step controlled add. heat”.
Menu 5.3.6 – step controlled add. heat

Here you can perform the following settings

Select when the addition is to start.
Set max permitted number of additional steps.
If binary stepping is to be used.

Caution: “start additional heat” in the menus 5.3.6 (external step- controlled additional heat) and 4.9.3 (degree minute settings internal additional heat) are factory set at 400DM. If both of the additional heat options are used and you want to have more steps, the start difference needs to be changed in one of the menus.

Forced control of the different components in the heat pump as well as in the different accessories that may be connected.

EB1-AA5-K1: Activating additional step 1.
EB1-AA5-K2: Activating additional step 2.
EB1-AA5-K3: Activating additional step 3.
EB1-AA5-K4: Activating the circulation pump (GP10).

See the ”General” section on page16 to see which accessory is required for your product.

Technical data

DIMENSIONS

All dimensions in mm.

NIBE-ELK-26-Electric-Heater-FIG-19

TECHNICAL SPECIFICATIONS

ELK 26

ENERGY LABELLING

Supplier		NIBE
Model		ELK 26
Energy efficiency class for space heating		D
Rated heat output (Pdesignh)	kW	26
Annual energy consumption space heating	kWh	58,674
Seasonal space heating energy efficiency	%	36.9
Sound power level LWA indoors	dB	35

Model	ELK 26
Condensing boiler
Low-temperature boiler
B11 boiler
Cogeneration space heater
Combination heater
Rated heat output	Prated
energy efficiency	ƞs

For boiler space heaters and boiler combination heaters: Useful heat output| | For boiler space heaters and boiler combination heaters: Useful efficiency
At rated heat output and high-temperature regime| P4| 26| kW| | At rated heat output and high-temperature regime| ƞ4| 40| %
At 30 % of rated heat output and low-temperature

regime

| P1| | kW| | At 30 % of rated heat output and low-temperat-

ure regime

| ƞ1| | %
Auxiliary electricity consumption| | Other items
At full load| elmax| | kW| | Standby heat loss| Pstby| 0.2| kW
At part load| elmin| | kW| | Ignition burner power consumption| Pign| | kW
Standby mode| PSB| 0.01| kW| | Annual energy consumption| QHE| 58,674| kWh
| | | | | Sound power level, indoors| LWA| 35| dB
For combination heaters
Declared load profile for water heating| | | Water heating energy efficiency| ƞwh| | %
Daily energy consumption| Qelec| | kWh| | Daily fuel consumption| Qfuel| | kWh
Annual energy consumption| AEC| | kWh| | Annual fuel consumption| AFC| | GJ