Dimplex SI 100ZS User manual

INSTALLATION and

OPERATING INSTRUCTIONS

Brine-to-Water Heat Pump

for Indoor Installation

Order No.: 452234.67.01 FD 8511

SI 50ZS / SI 75ZS / SI 100ZS

CONTENTS

1 READ IMMEDIATELY 3

1.1 Important Information

1.2 Legal Provisions and Guidelines

1.3 Energy-Efficient Use of the Heat Pump

2 PURPOSE OF HEAT PUMP 4

2.1 Application

2.2 Principle of Operation

3 SCOPE OF DELIVERY 4

3.1 Baseline Unit

4 ACCESSORIES 5

4.1 Connecting Flanges

5 TRANSPORT 5

6 INSTALLATION 6

6.1 General Information

6.2 Sound Emissions

7 MOUNTING 6/7

7.1 General Information

7.2 Connection on Heating Side

7.3 Connection on Heat Source Side

7.4 Electrical Connection

8 COMMISSIONING 8

8.1 General Information

8.2 Preparatory Steps

8.3 Commissioning Procedure

9 CARE/CLEANING 9

9.1 Care

9.2 Cleaning of Heating Side

9.3 Cleaning of Heat Source Side

10 MALFUNCTIONS/TROUBLE-

SHOOTING 10

10.1 Correction of Minor Malfunctions by

Owner

11 DECOMMISSIONING 10

11.1 Summer Shutdown

11.2 End-of-Life Decommissioning/Disposal

12 APPENDIX 11

READ IMMEDIATELY

1.1 Important Information

Any work on the heat pump may only

be performed by an authorised and qualified

customer service.

The transport securing devices must

be removed after the transport.

The heat pump must not be tilted

more than max. 45°(in either direction).

Flush the heating system prior to

connecting the heat pump.

The supplied strainer is to be fitted in

the heat source inlet of the heat pump to protect

the evaporator against contamination.

The brine solution must consist of at

least 25 % of a frost and corrosion protection

agent on a monoethylene glycol or propylene

glycol basis.

The clockwise phase sequence must

be ensured when connecting the load lines.

Commissioning of the heat pump must

be performed in accordance with the installation

and operating manual of the heat pump controller.

All electrical circuits must be dis-

connected from the power supply prior to opening

the unit.

READ IMMEDIATELY

CAUTION!

1.2 Legal Provisions and Guidelines

This heat pump conforms to all relevant DIN/VDE

regulations and EU directives. For details refer

to the EC Declaration of Conformity in the

appendix.

The electrical connection of the heat pump must

be performed according to and conforming with

all relevant VDE, EN and IEC standards. Beyond

that, the connection requirements of the local

utility companies have to be observed.

The heat pump is to be connected to the heat

source and heat distribution systems in accord-

ance with all applicable provisions.

Any work on the heat pump may only

be performed by an authorised and qualified

customer service.

1.3 Energy-Efficient Use of the Heat

Pump

By operating this heat pump you contribute to the

protection of our environment. A prerequisite for an

efficient operation is the proper design and sizing of

the heating system and the heat source system. In

particular, it is important to keep water flow

temperatures as low as possible. All energy

consumers connected should therefore be suitable

for low flow temperatures. A 1 K higher heating water

temperature corresponds to an increase in power

consumption of approx. 2.5 %. Underfloor heating

systems with flow temperatures between 30 °C and

40 °C are optimally suited for energy-efficient

operation.

CAUTION!

PURPOSE OF HEAT PUMP

SCOPE OF DELIVERY

PURPOSE OF THE HEAT

PUMP

2.1 Application

The brine-to-water heat pump is designed for use

in existing or newly built heating systems. Brine is

used as the heat carrier in the heat source system.

Ground coils, ground collectors or similar systems

can be used as the heat source.

2.2 Principle of Operation

The heat generated by the sun, wind and rain is

stored in the ground. This heat stored in the ground

is collected at low temperature by the brine circulating

in the ground collector, ground coil or similar device.

A circulating pump then conveys the warmed brine

to the evaporator of the heat pump. There, the heat

is given off to the refrigerant in the refrigeration cycle.

When so doing, the brine cools so that it can again

take up heat energy in the brine circuit.

The refrigerant, however, is drawn in by the electrically

driven compressor, is compressed and "pumped"

to a higher temperature level. The electrical power

needed to run the compressor is not lost in this

process, but most of the generated heat is trans-

ferred to the refrigerant as well.

Subsequently, the refrigerant is passed through the

condenser where it transfers its heat energy to the

heating water. Based on the thermostat setting, the

heating water is thus heated to up to 55 °C.

SCOPE OF DELIVERY

3.1 Baseline Unit

The baseline unit consists of a heat pump, ready

for connection, for indoor installation, complete with

sheet metal cabinet, control box and integrated

controller. The refrigeration cycle contains the

refrigerant R404A. Refrigerant R404A is CFC-free,

non-ozone depleting and non-combustible.

All components required for the operation of the heat

pump are located in the control box. A sensor for

the external wall temperature including mounting

hardware as well as a strainer are supplied with

the heat pump. The voltage supply for the load

and control current must be provided by the

customer.

The control wire of the brine pump (to be provided

by the customer) is to be connected to the control

box. When so doing, a motor protecting device is

to be installed, if required.

The collector loops including the brine manifold

must be provided by the customer.

123

1) Control 4) Compressor

2) Evaporator 5) Transport securing

devices

3) Condenser 6) Filter drier

TRANSPORT

ACCESSORIES

TRANSPORT

CAUTION!

ACCESSORIES

4.1 Connecting Flanges

The use of flat-sealing connecting flanges allows

the unit, as an option, to be connected by means of

flanges.

For the transport by means of a hand truck or

boiler trolley, position the latter under the front

end of the unit below the transport security device.

For transport on a level surface, the unit can be

lifted from the rear or from the front by means of a

lift truck or forklift. In this case, the transport

securing device is not imperative.

After the transport, the transport securing device

is to be removed on either side at the bottom of

the unit.

The heat pump must not be tilted

more than max. 45°(in either direction).

Remove/install transport

securing device

The transport securing device is to

be removed after the transport.

45°

INSTALLATION

MOUNTING

INSTALLATION

6.1 General Information

As a rule, the unit must be installed indoors on a

level, smooth and horizontal surface. The entire base

frame should make full contact with the surface in

order to ensure adequate sound insulation. Failing

this, additional sound insulation measures may

become necessary.

The heat pump should be installed to allow easy

maintenance/service access. This is ensured if

a clearance of approx. 1 m in front of the heat

pump is maintained.

6.2 Sound Emissions

The heat pump offers silent operation due to efficient

sound insulation. Any sound transmission to the

foundation or the heating system can be largely

prevented by internal sound decoupling measures.

CAUTION!

MOUNTING

7.1 General Information

The following connections need to be estab-

lished on the heat pump:

- supply/return flow of the brine system

- supply/return flow of the heating system

- power supply

7.2 Connection on Heating Side

The heating system must be flushed

prior to connecting the heat pump.

Before completing the heat pump connections on

the heating water side, the heating installation must

be flushed in order to remove any impurities that

may be present, as well as residues of sealing

material, and the like. Any accumulation of deposits

in the condenser may result in a total failure of the

heat pump.

Once the installation on the heating side has been

completed, the heating system must be filled, de-

aerated and pressure-tested.

The sensor supplied loose in the control box must

be fitted as shown in the block diagram.

Heating water minimum flow rate

The heating water minimum flow rate through the

heat pump must be assured in all operating states

of the heating system. This can be accomplished,

for example, by installing a differential pressure-free

manifold or an overflow valve. The procedure for

setting an overflow valve is described in the Chapter

Commissioning.

Frost protection for installations prone to frost

Provided the controller and heating circulating

pumps are ready for operation, the frost protection

feature of the controller is active. If the heat pump

is taken out of service or in the event of a power

failure, the system has to be drained. In heat pump

installations where a power failure cannot be readily

detected (holiday house), the heating circuit must

contain a suitable antifreeze product.

0,5m

MOUNTING

7.3 Connection on Heat Source

Side

The following procedure must be observed when

making the connection:

Connect the brine line to the flow and return pipe

of the heat pump.

The supplied strainer must be fitted

in the heat source inlet of the heat pump in order

to protect the evaporator against the ingress

of impurities.

In addition, a powerful vent must be installed at

the highest point of the heat source system. The

hydraulic plumbing diagram must be observed

here.

The brine liquid must be produced prior to

charging the system. The brine concentration

must be at least 25 %. Freeze protection down to

-14°C can thus be ensured.

Only antifreeze products on the basis of mono-

ethylene glycol or propylene glycol may be used.

The heat source system must be vented (de-

aerated) and checked for leaks.

The brine solution must contain at

least 25 % of an antifreeze and corrosion

protection agent on a monoethylene glycol or

propylene glycol basis.

7.4 Electrical Connection

The following electrical connections must be

established on the heat pump:

- Connection of the control wire to terminals X1:

L/N/PE in the control box of the heat pump.

- Connection of the load wire to terminals X5:

L1/L2/L3/PE in the control box of the heat pump.

- The control of the brine pump is effected via the

controller N1/J12/N03/N + PE (max. 200 W), or

a pump contactor connected to these terminals

(without PE). If a motor protective switch is used,

the auxiliary contact (NC contact) needs to be

connected to N1/J5/ID5 and X2, instead of the

wire jumper which must be removed.

All electrical components required for the operation

of the heat pump are located in the control box.

CAUTION!

For more detailed instructions concerning the

connection and functioning of the heat pump

controller (e.g. the supplied external wall sensor)

please refer to the enclosed operating manual of

the controller.

An all-pole disconnecting device with a contact gap

of at least 3 mm (e.g. utility company disable contac-

tor or power contactor) as well as a 3-pole circuit

breaker with simultaneous tripping of all external

conductors must be provided . The required cross-

sectional area of the conductors is to be selected

according to the power consumption of the heat

pump, the technical connection requirements of the

relevant utility company and all applicable regula-

tions. Power consumption data of the heat pump is

provided in the product literature and on the

nameplate. The terminals are designed for a max.

conductor cross-section of 35 mm˝.

The clockwise phase sequence must

be observed when connecting the load lines (the

heat pump will deliver no output and will be very

noisy when the phase sequence is incorrect).

The power cable must be run through the guide

tubes, inserted into the side of the control box and

secured by means of the strain relief.

CAUTION!

COMMISSIONING

CAUTION!

COMMISSIONING

8.1 General Information

To ensure proper commissioning it should be carried

out by a customer service authorised by the manu-

facturer. Only then can an extended warranty period

of 3 years in total be granted (cf. Warranty service).

8.2 Preparatory Steps

Prior to commissioning, the following items need

to be checked:

- All connections of the heat pump must have

been made as described in Chapter 7.

- The heat source system and the heating circuit

must have been filled and checked.

- The strainer must have been fitted in the sole

inlet of the heat pump.

- In the brine and heating circuits all valves that

might impair the proper flow must be open.

- The settings of the heat pump controller must

be adapted to the heating installation in

accordance with the instructions contained in

the controller's operating manual.

8.3 Commissioning Procedure

The start-up of the heat pump is effected via the

heat pump controller.

Commissioning is to be effected in

accordance with the installation and operating

manual of the heat pump controller.

Where an overflow valve is fitted to assure the

minimum heating water flow rate, the valve must be

set in accordance with the requirements of the

heating installation. An incorrect setting may result

in various error symptoms and an increased elec-

tric power consumption. To correctly set the overflow

valve, the following procedure is recommended:

Close all of the heating circuits which may also be

closed during operation (depending on the type of

heat pump usage) so that the least favourable

operating state - with respect to the water flow rate -

is achieved. Normally, these heating circuits are

those of the rooms located on the south and west

sides of buildings. At least one heating circuit must

remain open (e.g. bathroom).

The overflow valve is to be opened to such an extent

that based on the current heat source temperature

the maximum temperature difference between

heating supply and return flow temperature is

obtained, as indicated in the table below. The

temperature difference should be measured as

closely to the heat pump as possible. In mono-

energetic systems, the electric heating element is

to be deactivated.

Any malfunctions occurring during operation are

displayed on the heat pump controller and can be

corrected as described in the operating manual of

the heat pump controller.

-5 °C 0 °C 10 K

1 °C 5 °C 11 K

6 °C 9 °C 12 K

10 °C 14 °C 13 K

15 °C 20 °C 14 K

21 °C 25 °C 15 K

Heat source temperature

from to

max. difference between heating

supply and return temperature

CARE/CLEANING

9.3 Cleaning of Heat Source Side

The supplied strainer is to be install-

ed in the heat source inlet of the heat pump in

order to protect the evaporator against conta-

mination.

The filter screen of the strainer should be cleaned

one day after commissioning, thereafter every week.

If no more contamination can be noticed any more,

the strainer filter can be removed in order to reduce

pressure losses.

CAUTION!

CARE/CLEANING

9.1 Care

The heat pump is maintenance-free. To prevent

malfunctions due to sediments in the heat

exchangers, care must be taken that no im-

purities can enter the heat source system and

the heating installation. In the event that

operating malfunctions due to contamination

occur nevertheless, the system should be

cleaned as described below.

9.2 Cleaning of Heating Side

The ingress of oxygen into the heating water circuit

may result in the formation of oxidation products

(rust). It is therefore important - in particular with

respect to the piping of underfloor heating systems

- that the installation is executed in a diffusion-

proof manner. Also residues of lubricating

and sealing agents may contaminate the

heating water.

In the case of severe contamination leading to a

reduction in the performance of the condenser in

the heat pump, the system must be cleaned by a

heating technician.

Based on current knowledge, we recommend

cleaning with a 5% phosphoric acid solution or, in

the case that cleaning needs to be performed more

frequently, with a 5% formic acid solution.

In either case, the cleaning fluid should be at room

temperature. It is recommended that the heat

exchanger be cleaned in the direction opposite to

the normal flow direction.

To prevent acidic cleaning agents from entering

the circuit of the heating installation we recommend

that the flushing device be fitted directly to the supply

and return lines of the condenser of the heat pump.

Thereafter the system must be thoroughly

flushed using appropriate neutralising agents

in order to prevent any damage caused by

cleaning agent residues that may still be

present in the system.

All acids must be used with great care, all relevant

regulations of the employers' liability insurance

associations must be adhered to.

If in doubt, contact the manufacturer of the

chemicals!

Caution - Heating Technicians !

Depending on the filling water quality and

quantity, in particular in the case of mixed

installations and plastic pipes, mineral deposits

(rust sludge, lime) may form, impairing the pro-

per functioning of the heating installation. A

reason for this is the water hardness and oxygen

dissolved in the filling water as well as additio-

nal oxygen from the air, which may penetrate via

valves, fittings and plastic pipes (oxygen diffu-

sion). As a preventive measure it is re-

commended that a physical water conditio-ner

such as ELYSATOR be used.

CAUTION!

DECOMMISSIONING

11.1 Summer Shutdown

A heating-only system can be shut down in summer

(no domestic water heating). This can be effected

by means of the mode selector switch of the heat

pump controller. Please follow the instructions

contained in the controller's in-stallation and

operating manual.

To avoid possible frost damage, shutting down the

system without draining the heating circuit is only

permissible if outside temperatures are greater

than 0 °C.

11.2 End-of-Life Decommissioning/

Disposal

Before removing the heat pump, disconnect the unit

from the power source and close all valves.

Environment-relevant requirements regarding the

recovery, recycling and disposal of service fuels and

components in accordance with all relevant

standards must be adhered to. Particular attention

must hereby be paid to the proper disposal of

refrigerants and refrigeration oils.

MALFUNCTIONS/

TROUBLESHOOTING

10.1 Correction of Minor Malfunctions

by Owner

This heat pump is a quality product and designed

for trouble- and maintenance-free operation. In

the event that a malfunction occurs nevertheless,

you will be able to correct the problem yourself in

most of the cases. Simply consult the Malfunctions

and Troubleshooting table contained in the

installation and operating manual of the heat

pump controller.

If you cannot correct the malfunction yourself, please

contact the after-sales service agent in charge (see

Warranty Certificate).

All work on the heat pump may only

be performed by an authorised an qualified after-

sales service.

MALFUNCTIONS/TROUBLESHOOTING

DECOMMISSIONING

Disconnect all electrical circuits from

the power supply before opening the enclosure.

CAUTION!

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