Dimplex SI 11CS Technical document

MOUNTING and

OPERATING MANUAL

Brine-to-Water Heat Pump

for Indoor Installation

SI 14CS

SI 17CS

SI 21CS

SI 5CS

SI 7CS

SI 9CS

SI 11CS

Order No.: 452230.67.01 FD 8404

CONTENTS

1 READ IMMEDIATELY 3

1.1 Important Information

1.2 Legal Provisions and Directives

1.3 Energy-Efficient Use of the Heat Pump

2 PURPOSE OF THE HEAT

PUMP 4

2.1 Application

2.2 Principle of Operation

3 BASELINE UNIT 4

4 ACCESSORIES 5

4.1 Brine Manifold

5 TRANSPORT 5

6 INSTALLATION 6

6.1 General Information

6.2 Sound Emissions

7 MOUNTING 6/7

7.1 General

7.2 Connection on Heating Side

7.3 Connection on Heat Source Side

7.4 Electrical Connection

8 COMMISSIONING 8

8.1 General

8.2 Preparation

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

11 DECOMMISSIONING 10

11.1 Shutdown in Summer

11.2 End-of-Life Decommissioning

12 Appendix 11

READ IMMEDIATELY

1.1 Important Information

The heat pump is not attached to the

wooden pallet.

The heat pump must not be tilted

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

Do not lift unit by the holes in the

panel assemblies!

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 in order

to protect the evaporator against contamina-

tion.

The brine must contain at least 25 %

of a frost and corrosion protection agent on a

monoethylene glycol or propylene glycol basis.

The clockwise phase sequence

must be observed when connecting the load

line.

Commissioning of the heat pump

must be performed in accordance with the

mounting and operating manual of the heat

pump controller.

READ IMMEDIATELY

CAUTION!

Any work on the heat pump may only

be performed by authorised and qualified

customer service technicians.

All power circuits must be dis-

connected from the power source prior to

opening the cabinet.

CAUTION!

1.2 Legal Provisions and Directives

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 re-

levant VDE, EN and IEC standards. Beyond that, the

connection requirements of the local utility compa-

nies have to be observed.

The heat pump is to be connected to the heat source

and heat distribution systems in accordance with all

applicable provisions.

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!

BASELINE UNIT

The baseline unit consists of a heat pump, ready for

connection, for indoor installation, complete with sheet

metal cabinet, control panel and integrated controller.

The refrigeration cycle contains the refrigerant R407C.

Refrigerant R407C is CFC-free, non-ozone depleting

and non-combustible.

All components required for the operation of the heat

pump are located on the control panel. The power

feed for the load and control current must be field-

installed by the customer.

The supply lead of the brine pump (to be provided by

the customer) must be connected to the control

panel. When so doing, a motor protecting device is

to be installed, if required.

The collector loops including brine manifold must

be provided by the customer.

1 2 3

1) Condenser 3) Evaporator

2) Control panel 4) Compressor

PURPOSE OF HEAT PUMP

BASELINE UNIT

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.

54ACCESSORIES

4.1 Brine Manifold

The brine manifold ties the individual collector loops

of the heat source system into a single main line

which is connected to the heat pump. Integrated ball

valves allow individual brine circuits to be shut off for

venting purposes.

ACCESSORIES

TRANSPORT

A lift truck is suited for transporting the unit on a level

surface. If the heat pump needs to be transported

on an uneven surface or carried up or down stairs,

carrying straps may be used for this type of transport.

These straps may be passed directly underneath

the wooden pallet.

The heat pump is not secured to the

wooden pallet.

The heat pump must not be tilted

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

For lifting the unit without pallet, the holes provided

in the sides of the frame should be used. The side

panel assemblies must be removed for this

purpose. A commercially available pipe can be used

as a carrying aid.

Do not use the holes in the panel

assemblies for lifting the unit!

CAUTION!

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 thereby make close 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 located to allow safe and

easy maintenance/service access. This is ensured

if a clearance of approx. 1 m in front of and to each

side of the heat pump is maintained.

6.2 Sound Emissions

The heat pump offers silent operation due to efficient

sound insulation. To prevent noise transmission to

the foundation, a suitable, sound dampening rubber

mat should be placed underneath the base frame

of the heat pump.

Any sound transmission to the heating systems is

prevented by means of flexible pressure tubing

already integrated into the heat pump.

INSTALLATION

MOUNTING

CAUTION!

6MOUNTING

7.1 General

The following connections need to be established

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.

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 controllers and 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.

CAUTION!

MOUNTING

7.4 Electrical Connection

The following electrical connections must be

established on the heat pump:

- Connection of the control wire to the control panel

of the heat pump via terminals X1: L/N/PE.

- Connection of the load wire to the control panel

of the heat pump via terminals X5: L1/L2/L3/PE.

- Connection of the brine pump (to be provided by

the customer) to the control panel of the heat

pump via terminal X1: PE and pump contactor

K2: 2/4/6 (.. 5-17CS), or motor protection F7: 2/4/

6 (.. 21CS).

All electrical components required for the operation

of the heat pump are located on the control panel.

For detailed instructions concerning the connection

and functioning of the heat pump controller refer to

the operating manual supplied with the controller.

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 be 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.

CAUTION!

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 conductor 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 10 mm˝.

The clockwise phase sequence

must be observed when connecting the load line

(the heat pump will deliver no output and will be

very noisy when the phase sequence is in-

correct).

CAUTION!

COMMISSIONING

8.1 General Information

To ensure proper commissioning it should be

carried out by an after-sales service authorized by

the manufacturer. Only then can an extended

warranty period of 3 years in total be granted (cf.

Warranty service).

8.2 Preparation

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

could impair the proper heating water 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 of the heat pump

must be performed in accordance with the

mounting 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:

a) Open all heating circuits and close the overflow

valve. Determine the resulting temperature

difference between supply and return flow.

8b) Close all of the heating circuits that may also be

closed during operation (depending on the type

of heat pump usage) so that the most unfa-

vourable operating state - with respect to the water

flow rate - is achieved.

c) In this operating state open the overflow valve

until approximately the same temperature

difference exists that was measured under a)

when the overflow valve was closed and the

heating circuits open.

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.

CAUTION!

COMMISSIONING

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 waters as well

as additional oxygen from the air, which may

penetrate via valves, fittings and plastic pipes

(oxygen diffusion). As a preventive measure it

is recommended that a physical water conditio-

ner such as ELYSATOR be used.

9.3 Cleaning of Heat Source Side

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.

CARE/CLEANING

9.1 Care

The heat pump is maintenance-free. To prevent

malfunctions due to sediments in the heat ex-

changers, care must be taken that no impurities can

enter the heat source system and heating installa-

tion. 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 contaminations leading to a

reduction of the performance of the condenser in

the heat pump, the system must be cleaned by a

heating technician.

According to 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. To prevent any

damage caused by cleaning agent residues that

may be present in the system it is important that the

system be thoroughly flushed using appropriate

neutralising agents.

The 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!

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.

DECOMMISSIONING

11.1 Shutdown in Summer

Shutting down the heating system in summer is

effected by switching the heat pump controller to the

"Summer" operating mode.

11.2 End-of-Life Decommissioning/

Disposal

Before removing the heat pump, disconnect the

machine 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

This heat pump is a quality product and is designed

for trouble-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 Trouble-

shooting table contained in the operating manual of

the heat pump controller.

Additional malfunctions can be interrogated at the

heat pump controller.

If you cannot correct the malfunction yourself, please

contact the after-sales service agent in charge (see

Warranty Certificate).

CAUTION!

All work on the heat pump may only

be performed by an authorised and qualified

after-sales service.

All electrical circuits must be dis-

connected from the power source prior to

opening the equipment.

MALFUNCTIONS/TROUBLESHOOTING

DECOMMISSIONING

CAUTION!

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