Danfoss VX Solo HWS Operating guide

MAKING MODERN LIVING POSSIBLE

VX Solo HWS

Instructions for installation and use

Danfoss District Energy


Instructions for installation and use		VX Solo HWS substations

VX Solo HWS, thermostatic control 1 HE circuit + secondary connection for DHW cylinder

VX Solo HWS, thermostatic control 1 HE circuit + secondary connection for DHW cylinder,

with cover

1.Contents

1.0	Contents........................................................................................................................................................................................................................................	2
2.0	Product introduction...............................................................................................................................................................................................................	3
	2.1 VX Solo HWS (thermostatic control and terminal box) - 1 HE circuit + sec. connection for DHW cylinder......................................	3
3.0	Dimensional sketch / connections.....................................................................................................................................................................................	4
4.0	Enduser instructions, General..............................................................................................................................................................................................	5
5.0	Enduser instructions, Adjustment and Setting..............................................................................................................................................................	6
6.0	Installation instructions, Safety and Handling...............................................................................................................................................................	7
7.0	Installation instructions - Getting started........................................................................................................................................................................	8
8.0	Description of VX Solo HWS..................................................................................................................................................................................................	9
9.0	Installation instructions, general.........................................................................................................................................................................................	9
10.0 Commissioning and start-up, VX Solo HWS.................................................................................................................................................................		13
	10.1 Programmable room thermostat / DHW time controller TP9000...............................................................................................................	13
11.0 Domestic hot water cylinder.............................................................................................................................................................................................		16
12.0 Maintenance...........................................................................................................................................................................................................................		17
	12.1 Maintenance schedule (recommendations)......................................................................................................................................................	18
13.0 Troubleshooting.....................................................................................................................................................................................................................		19
	14.1 Troubleshooting - Heating........................................................................................................................................................................................	19
	13.2 Troubleshooting - Domestic hot water................................................................................................................................................................	21
14.0 EU Declaration of Conformity...........................................................................................................................................................................................		23
15.0 Commissioning Certificate.................................................................................................................................................................................................		24

2 DKDHR

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Danfoss District Energy


Instructions for installation and use	VX Solo HWS substations

2.0Product introduction

2.1VX Solo HWS (thermostatic control and terminal box) - 1 HE circuit + sec. connection for DHW cylinder

Supply limit

Storage cylinder		Top:
		Cylinder
		supply
		Common
		return
Radiator return
		DH
1	Plate heat exchanger, HE, insulated	supply
4	Differential pressure controller AVPL
5	Dirt strainer
8	Circulation pump, HE
11	Safety valve, HE 2.5 bar	DH
13	Thermometer	DH
14	Pocket for pressure gauge ¼	return
15	Manometer
16	Expansion vessel 12 L

17 Air valve

19 Fill valve / Tapping point

23Sensor pocket for heat meter ½“

24Fitting piece for heat meter, 3/4” x 110 mm

30 Thermostat AVTB 30-100 °C

52 Zone valve Danfoss VMT/TWA-V

60 Terminal box

---------------------------------------------------

Terminal box is prepared for wiring of electronic programmable room thermostat TP9000 for heating or DHW operation according to demand.

Bottom:

Supply

Principal components

1 Plate heat exchanger HE

4 Differential pressure controller

8 Circulation pump, HE

11 Safety valve HE

15Manometer

16Expansion vessel

17Air valve

19 Fill valve

24 Fitting piece for heat meter

30 Thermostat Danfoss AVTB 30-100 °C

52 Zone valve Danfoss VMT/TWA-V

60 Terminal box

	Secondary		Primary

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52 17

1 52 8

11 4

60
60			24
		52






	<![if ! IE]> <![endif]>HE supply
	Secondary
	Secondary

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DKDHR 3


Instructions for installation and use	VX Solo HWS substations

3.0 Dimensional sketch / connections

Dimensions:

Dimensions without cover H 850 x W 560 x D 350 mm

Dimensions with cover

H 1000 x W 600 x D 400 mm

Connections:

Order:

1Cylinder (DHW) supply

2Common return

3District heating (DH) return

4District heating (DH) supply

5Heating (HE) supply

Connections size:
DH:	G¾” (IT)
HE:	G¾” (IT)
Cylinder:	G¾” (IT)

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<![endif]>Zirk.

Wall

top view

4 DKDHR

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Danfoss District Energy


Instructions for installation and use	VX Solo HWS substations

4.0 Enduser instructions, General

Instructions

Please read these instructions carefully before installing and commissioning this substation. The manufacturer accepts no liability for loss or damage resulting from failure to comply with these instructions for use. Read and follow these instructions carefully to prevent the risk of physical injury and/or damage to property. Exceeding the recommended operating parameters appreciably increases the risk of personal injury and/or damage to property.

Installation, commissioning and maintenance must be carried out by qualified and authorised personnel (both plumbing and electrical work).

Once the station has been installed and is operating, there is normally no need to alter the settings or other functions. The district heating substation is very reliable and easy to operate.

If necessary, you can change the temperature settings as described on page 6. For more detailed information about the substation, see the sections concerning installation and commissioning.

Description

These instructions apply to substation type VX Solo HWS, which is a district heating substation for indirect heating for single-family houses, semi-detatched and terraced houses as well as flats. With one heating circuit for radiator and/or floor heating and with connection pipes for domestic hot water cylinder on secondary side. For wall-mounting.

The HE supply temperature is controlled by a self-acting temperature controller Danfoss AVTB.

An immersion control thermostat of your choice choice, used to control the water temperature in the hot water cylinder, must be mounted on site.

As optional supply, Danfoss offers an immersion control thermostat type ITC, which must be ordered separately and supplied loose together with the substation for mounting on site.

The ITC must be mounted in the 2/3 point of the DHW cylinder.

The VX Solo HWS is specificly prepared for connection of a TP9000 programmable room thermostat / DHW time controller, which allows heating and DHW operation according to demand. The integrated room thermostat will open/close the zone valve for heating operation and the DHW sensor in the cylinder or the DHW timer will open/ close the zone valve for DHW operation.

We recommend regular inspections of the substation - ideally in connection with readings of the district heating meter.

Pay special attention to any leaks and an excessively high return temperature in the district heating circuit (poor cooling of the district heating water). Cooling – i.e. the difference between the supply and return temperature of the district heating water – has a significant effect on the overall energy economy. Therefore, it is important to focus on the supply and return temperature in the heating system.

The difference should typically be 30–35°C in systems that operate with radiators.

Irregularities

When reading the meters, check all joints and connections for leaks.

Check the troubleshooting section before contacting your professional provider.

Warning! Hot surfaces

Parts of the substation may be very hot and can cause burn injuries. Be very careful when you are in the immediate vicinity of the unit.

Warnings about high pressure and high temperature

The maximum supply temperature in the district heating network can be up to 110°C and the operating pressure can be up to 16 bar. This may result in a risk of scalding from touching the substation and from outflow of the medium (water/steam). Exceeding the substation design data and operating parameters for pressure and temperature carries an appreciable risk of personal injury and/or damage to property.

Emergencies

In the event of fire, leaks or other hazards, immediately shut off all sources of energy to the substation, if possible, and call for appropriate assistance.

If the domestic hot water is discoloured or malodorous, shut off all ball valves on the substation and the storage cylinder, notify all users and call for professional assistance without delay.

Danfoss District Energy

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DKDHR 5


Instructions for installation and use	VX Solo HWS substations

5.0 Enduser instructions, Adjustment and Setting

Heating circuit, Differential Pressure Controller	Fig. 1
The differential pressure controller (Fig. 1) reduces the high, fluctuat-	Fig. 1
ing pressure in the district heating network to a constant operating
pressure.
The TD200 differential pressure controller is preset from factory and
should not be adjusted afterwards.
Heating circuit, Temperature control
Thermostatic control
The HE temperature is controlled by a self-acting temperature control-
ler Danfoss AVTB (Fig. 2).The controller has a control valve, thermostatic
actuator and handle for temperature setting.
The thermostat will be set by the installer in connection with the com-
missioning, but it may be necessary to adjust it subsequently depend-
ing on the outdoor temperature.	Fig. 2
Approximate thermostat scale settings:	Fig. 2
1.0 = 35 °C
1.5 = 45 °C
2.0 = 55 °C
2.5 = 65 °C
3.0 = 75 °C
The setting values may vary depending on the operating conditions.
It is important to set the supply temperature to the radiators as low
as possible. Use the radiator thermostat to regulate the room tem-
perature.
Other variations with other types of thermostatic valves for control of
the heating circuit may occur.
Pump.	Fig. 3
VX Solo HWS substations are factory fitted with a pump (Fig. 3). The	Fig. 3
pump setting is established in connection with the commissioning.
Generally speaking, this setting is not to be altered. If it should neverthe-
less be necessary to change the pump setting, see the section concern-
ing pumps in the installation and commissioning sections regarding the
individual products.
Programmable Room thermostat / DHW time controller
TP9000
The VX Solo HWS is specificly prepared for connection of a TP9000
controller (Fig. 4), which allows heating and DHW operation accord-	Fig. 4
ing to demand.	Fig. 4
The TP9000 comes with a factory preset clock with automatic sum-
mer/winter time changes, and at installation the TP9000 is set to
operate in either full 7 day, 5 day/2 day mode, which allows different
programmes to be set for the weekend, or in 24 hour mode, in which
case the programmed events are repeated every 24 hours.
There is normally no need to alter the settings or other functions. How-
ever, should this be necessary, we recommend that you contact your
professional provider, or refer to separate instructions for TP9000.
Immersion Control Thermostat (mounting on site)
An applicable immersion control thermostat of your choice choice
must be mounted in the 2/3 point of the DHW cylinder.	Fig. 5
An immersion control thermostat offers secure immersion sensing,
and is used to control water temperature in the hot water cylinder.
As optional supply, Danfoss offers an immersion control thermostat
type ITC (Fig. 5), which must be ordered separately and supplied
loose with the substation for mounting on site.
The immersion thermostat has a 100mm insertion length and is sup-
plied with a ½”BSP/100mm pocket. It has an adjustment range of

0-90°C has SPDT contact. Recommended setting is 60 °C.

6 DKDHR VI.HE.M1.02

TD200

AVTB

Immersion Control Thermostat ITC for cylinder - 132.886 - Code No. 099-1057

Danfoss District Energy


Instructions for installation and use	VX Solo HWS substations

6.0 Installation instructions, Safety and Handling

Instructions

Please read these instructions carefully before installing and comissioning this substation. The manufacturer accepts no liability for loss or damage resulting from failure to comply with these instructions for use. Read and follow these instructions carefully to prevent the risk of physical injury and/or damage to persons and property. Exceeding the recommended operating parameters considerably increases the risk of personal injury and/or damage to property.

Installation, commissioning and maintenance must be carried out by qualified and authorized personnel in compliance with the local safety regulations.

Once the station has been installed and is operating, there is normally no need to alter the settings or other functions. The district heating substation is very reliable and easy to operate.

Energy source

The substation is primarily designed for connection to district heating. Alternative energy sources can be used if the operating conditions are equivalent to district heating at all times.

Application

The substation is designed only to operate with water or a water-glycol mixture (up to 40%), and other heating media may not be used.

The substation is to be connected to the household piping in a frost-free room, where the temperature does not exceed 50 °C and the relative humidity is not higher than 80%. The substation must no be covered, bricked in or otherwise cut off from access.

Choise of materials

Only use materials, that comply with local regulations.

Corrosion

The maximum chloride compounds of the medium must not be higher than 300 mg/l.The risk of corrosion increases considerably if the recommended chloride content is exceeded.

Safety valve(s)

Installation of safety valve(s) must always be in compliance with local regulations.

Noise level.

≤ 55 dB.

Storage

Before installation, the units must be stored in a dry, heated (i.e. frostfree) room.

(Relative humidity max. 80% and storage temperature 5-70 °C).

The units must not be stacked higher than the limit at the factory (max. 8 layers) Units supplied in cardboard packaging must be lifted using the handles incorporated in the packaging. Units must be placed on pallets for transport/moving across large distances.

As far as possible, do not lift the substation by the pipes. Lifting by the pipes may cause leaks. REMEMBER to retighten.

Disposal

Dispose of the packaging in accordance with the local regulations for disposal of used packaging materials.

The substation is made of materials that cannot be disposed of together with household waste.

Close all energy sources and disconnect all connection pipes. Disconnect and dismantle the product for disposal in accordance with the applicable local regulations for the disposal of the individual components.

Connection

It must be possible to cut off all energy sources to the unit - including electrical connections - at all times.

Warning! Hot surfaces

Parts of the substation may be very hot and can cause burn injuries. Be very careful when you are in the immediate vicinity of the substation.

Warning of high pressure and high temperature

Emergencies

In the event of fire, leaks or other hazards, immediately shut off all sources of energy to the substation, if possible and call for appropriate assistance.

If the domestic hot water is discoloured or malodorous, shut off all ball valves on the substation, notify all users and call for professional assistance immediately.

Warning of damage during transport

On reception of the substation, and before installing it, check for any evidence of damage during transport.

The substation must be handled and moved with the greatest care and attention.

NB! - Tightening of connections

Before mounting of the substation, ALL pipe connections MUST be retightened, as vibrations during transport may have caused leaks. Once the substation has been put into operation ALL pipe connections MUST be pressure tested for leaks and retightened once more if necessary.

DO NOT OVERTIGHTEN THE PIPE CONNECTIONS – see page 9, “Test & connections” for more information.

Handling

We recommend that you wear suitable safety footwear while handling and installing the substation.

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Instructions for installation and use	VX Solo HWS substations

7.0 Installation instructions - Getting started

Connect the substation to the household piping in accordance with the labelling at the bottom/top and/or in accordance with the instructions in this manual.

Commissioning:

1.The substation is prepared for wall mounting. Mount the substation on a solid wall using two sturdy bolts, screws, expansion bolts or similar.

2.Mount immersion control thermostat (either type ITC, which can be supplied loose from Danfoss as an option or any other applicable thermostat) and wire this to the terminal box according to wiring diagram on page 11.

3.Mount programmable controller TP9000 (to be ordered separately) and wire this to the terminal box according to wiring diagram on page 11.

4.Close all shut-off valves (to be ordered separately) on the substation before connecting it/them to the household piping.

5.Mount the district heating meter (see page 10).

6.IMPORTANT! Tighten all pipe connections, as they may have loosened during transport and handling.

7.On systems that feature a safety valve, establish a drain connection in compliance with the applicable legislation.

8.Fill the heat exchanger/ the system with water according to the instructions on page 12 until the manometer shows a working pressure, which corresponds to the system height + approx. 5 m (approx. 1.2 - 1.5 bar).

9.Check the substation and the household piping thoroughly for leaks.

10.Pressure test the entire system for leaks in accordance with the applicable regulations.

11.Connect the terminal box to the electricity supply, but do not switch on the power.

12.Heat the system and vent the radiator circuit/heating side thoroughly on the radiators and the air valve, if any.

13.Remove the red split on the position indicator of the zone valve.

14.Now switch on the power.

15.Finish by adjusting the substation in accordance with the instruction manuals.

Heating and cooling the substation may cause leaks. Therefore it may be necessary to retighten the connections in the period after commissioning.

8 DKDHR

VI.HE.M1.02

Danfoss District Energy


Instructions for installation and use	VX Solo HWS substations

8.0 Description of VX Solo HWS

Substation for indirect heating for single-family, semi-detatched and terraced houses as well as flats. With one heating circuit for radiator or floor heating and with connection pipes for domestic hot water cylinder on the secondary side. For wall-mounting.

The temperature for the heating circuit is controlled by a self-acting temperature controller Danfoss AVTB.

An applicable immersion control thermostat of your choice, used to control the water temperature in the hot water cylinder must be mounted on site.

Danfoss offers an immersion control thermostat type ITC, which must be ordered separately and supplied loose with the substation for mounting on site.

The substation is prepared for mounting of a programmable TP9000 controller, which allows heating and DHW operation according to demand. The integrated room thermostat will open/close the zone valve for heating operation and the DHW sensor in the cylinder or the DHW timer will open/close the zone valve for DHW operation.

Please note:

Your substation may look different than the substation shown, as variants with other components may be supplied.

Supplier instructions for the fitted components will always be supplied together with the substation.

9.0 Installation instructions, general

Installation

The installation, connection and maintenance of the substation must be performed by qualified and authorised personnel.

Installation must always be performed in accordance with the applicable legislation and in compliance with these instructions.

The substation must be installed so that it is freely accessible and can be maintained without unnecessary disruption. Lift the substation by its mounting plate and secure it to a solid wall using 2 sturdy bolts, screws or expansion bolts positioned in the two keyholes in the mounting plate.

Before commissioning, rinse all the pipes in the household piping system thoroughly to remove any impurities, and check and clean the dirt strainers in the substation.

Connect the substation to the household piping in accordance with the labelling at the bottom/top and/or in accordance with the instructions in this manual.

Test and connections

Before filling the system with water, retighten all the pipe connections because vibrations and shocks during transport and handling may have caused leaks. Once the system has been filled with water, tighten all the pipe connections once more before performing pressure test for leaks. After heating of the system, check all the connections and retighten if necessary.

Please note that the connections feature EPDM rubber gaskets! Therefore, it is important that you DO NOT OVERTIGHTEN the union nuts. Over-tightening may result in leaks. Leaks caused by overtightening or failure to retighten connections are not covered by the warranty.

Connections

Connection of pipes for DH supply and return, common return as well as DHW cylinder is established in top of the substation, and connection of pipe for HE supply is established in bottom of the substation.

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+ 19 hidden pages