UKV 20500 - Heat pump Nibe - Free user manual and instructions

Product type	Buffer tank for heat pump
Brand	Nibe
Model	UKV 20500
Volume	98 liters
Net weight	31 kg
Max. operating pressure	6 bar (0.6 MPa)
Operating temperature range	+4 to +95 °C
Dimensions (diameter x height)	450 mm x 1012 mm
Hydraulic connections	4 x G1" (internal thread): heating flow (XL1), heating return (XL2), heat pump flow (XL8), heat pump return (XL9)
Tank material	Steel with polyurethane insulation and white powder-coated sheet metal casing
Energy efficiency class	C (scale A+ to F)
Heat loss	60 W
Installation	Wall-mounted, vertical
Maintenance	Inspect the safety valve 4 times a year; bleed by loosening the XL1 connection
Included accessories	Mounting bracket
Product ref.	088 207

Frequently Asked Questions - UKV 20500 Nibe

What is the role of the UKV 20500 buffer tank?

The UKV 20500 is a buffer tank that increases the water volume of the heating system, ensures a minimum flow rate for the heat pump, and reduces temperature peaks, thus limiting frequent cycling of the heat pump.

How to install the UKV 20500 buffer tank?

It must be installed in a dry place at temperature >0°C, fixed to the wall using the provided bracket, in a vertical position. Hydraulic connections must be made according to applicable standards.

What is the maximum operating pressure?

The maximum operating pressure is 6 bar (0.6 MPa).

How to bleed the buffer tank?

To bleed, loosen the XL1 connection at the top until only water flows out, then close again.

What maintenance is required?

Inspect the safety valve about four times a year by manually opening it to check water flow. If no flow, replace it.

Can the unit be used with glycol water?

The manual does not specify the use of glycol. If in doubt, consult a qualified installer.

What are the dimensions of the UKV 20500?

The diameter is 450 mm and the height is 1012 mm.

What is the weight of the unit?

The net weight is 31 kg.

How to connect the buffer tank to the heat pump?

Use the connections XL8 (heat pump flow) and XL9 (heat pump return) with G1 diameter pipes. Follow the schematic diagrams in the manual.

What to do in case of heating noise?

Noises can be due to temperature variations. Installing a UKV 20500 helps stabilize temperature and reduce these noises.

USER MANUAL UKV 20500 Nibe

Icon of a wrench and hand inside a hexagon, symbolizing tools or maintenance (no text or symbols)

CHB 2305-14

611182

White cylindrical water heater with black connectors at both ends (no text or symbols visible)

Table of Contents

Svenska

4Viktig information

6Till användaren

7Till installatören

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 an 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 2023.

SERIAL NUMBER

The serial number can be found on top of the product.

Caution

Always give the product's serial number when reporting a fault.

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

se household waste. It must be disposed of at a special waste nderation or dealer who provides this type of service.

Improper disposal of the product by the user results in ad- ministrative penalties in accordance with current legislation.

SYMBOLS

Explanation of symbols that may be present in this manual.

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.

MARKING

Explanation of symbols that may be present on the product's label(s).

GENERAL

UKV 100 is designed and manufactured according to sound engineering practice in order to ensure safe usage.

INSPECTION OF THE INSTALLATION

Current regulations require the heating installation to be inspected before it is commissioned. The inspection must be carried out by a suitably qualified person.

√				DateSignatu
Heating medium (page 14)
	Shut o valves
	Safety valve

For the User

MAINTENANCE

The safety valve in the system where the accumulator tank is installed must be inspected regularly (about four times a year) to prevent blockages.

To inspect the valve, open the safety valve manually and check that water ows through the overow pipe. If this does not happen then the safety valve is defective and must be replaced.

SERVICE

For service, contact the installer. Serial number (PZ3) (14 digits) and installation date should always be stated.

Only replacement parts supplied by NIBE may be used.

For the Installer

GENERAL

UKV 100 has several dierent areas of use.

UKV 100 can be used during external control of the heating system. The heat pump then charges UKV 100 with oating or xed condensing. The external control function controls the heat distribution from UKV 100 to the consumer.

If the ow to the heating system can be restricted using radiator thermostats, for example, install a UKV 100 as an intermediate tank. This ensures a secure ow for the heat pump.

UKV 100 also allows a greater ow to the heating system than across the heat pump.

In some installations, so-called heating clicks occur as a result of movements during changes in temperature. To eliminate temporary changes in temperature, and thereby prevent heating clicks, install a UKV 100 after the heating installation.

UKV 100 can also be used to increase the system volume and thereby prevent malfunctions.

The accumulator tank consists of a condensation-insulated steel vessel with polyurethane insulation. Outer cladding in white, powder-coated sheet metal with ends of durable plastic.

The accumulator tank is designed and manufactured for maximum cut-o pressure of 6 bar.

The working temperature is +4 to +95 °C.

TRANSPORT

UKV 100 should be transported and stored in the dry.

ASSEMBLY

The accumulator tank must be installed in a dry area at a temperature that does not drop below 0 °C (frost-free).

MOUNTING

UKV 100 has to be installed vertically suspended on the wall. First install the enclosed mounting bracket on the wall, then suspend UKV 100 from the bracket.

SUPPLIED COMPONENTS

Suspension bracket.

COMPONENT LOCATION

UKV 100

tion	NameDesigna-
a	Submerged tube 09,5 mmUA1
	Submerged tube 09,5 mmUA2
	Holes for wall bracketUL2
	Serial number platePZ3

INSTALLATION

All connections (including connections or holes that are used) must be insulated to minimise energy losses.

DOCKINGS

NOTE

These are outline diagrams. Actual installations must be planned according to applicable standards.

Volume increase as well as reduction of spikes

graph TD
    A["Device"] --> B["Processing Unit"]
    B --> C["Output Module"]
    B --> D["Storage Unit"]
    D --> B
    B --> E["Data Bus"]
    E --> A

A UKV 100 is installed as a volume increaser in those cases. Vent the accumulator tank by loosening the connection where the system volume in the climate system is below (XL1) at the top of the accumulator tank. the minimum recommended volume for the heat pump. 2. Fill the vessel through the drain valve.

Volume and ow increaser and reduction in heat spikes

graph TD
    A["Server"] --> B["Processing Unit"]
    B --> C["Output Module"]
    A -->|Data Flow| B
    B -->|Data Flow| C

A UKV 100 is installed as a volume and ow increaser in those cases where the system volume in the climate system is below the minimum recommended volume for the heat pump and/or the ow is restricted without control.

Volume increase as well as reduction of heat spikes

graph LR
    A["Device"] --> B["Processing Unit"]
    B --> C["Output Module"]
    B --> D["Storage Unit"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333

A UKV 100 is installed as a volume increaser in those cases where the system volume in the climate system is below the minimum recommended volume for the heat pump.

PIPE INSTALLATION

Pipe installation must be carried out in accordance with current norms and directives.

The drain valve is installed on the heating system's return line (XL2).

The system where UKV 100 is installed must be supplied with a safety valve of max. 6 bar (0.6 MPa).

The overow pipe must be the same size as the safety valve's. Route the overow pipe from the safety valve, sloping along its entire length, and ensure that it is frost- eat of and well supported. The mouth of the overow pipe must be visible and not placed close to electrical components.

Ensure that incoming water is clean.

If uncertain, contact a plumber alternatively see applicable standards.

FILLING

Fill the accumulator tank as follows:

1. Fill the vessel through the drain valve.

2. When only water comes out of the connection (XL1) (an air-water mixture emerges initially), the connection can be closed and the accumulator tank is lled.

Technical data

DIMENSIONS

UKV 100

TECHNICAL SPECIFICATIONS

		UKV100M
		98litreVolume
		31kgNet weight
		0.6 / 6MPa/barMax
	°CMax4oper95ng tempera
Part No.		088 207

ENERGY LABELLING

Supplier		NIBE
Model		UKV-100
Eciency class 1		C
Heat loss	W	60
Volume	I	98

1 Scale for the product's eciency class A+ to F.

PIPE CONNECTIONS
UKV 100

PIPE DIMENSIONS

Connection
		G1" int.Supply line, heating systemXL1
		G1" int.Return line, heating systemXL2
		G1" int.Docking from heat pumpXL8
		G1" int.Docking to heat pumpXL9

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