HISEER VR2002 Installation Operation & Maintenance

GEOTHERMAL HEAT PUMP

Installation ,Operation &Maintenance Manual VR2002

V.201212

The Installation of this unit is to adhere to all Local

Building Codes and Standards

Index

Pre-Installation ............................................................................................................. 2

Installation Location and Positioning ........................................................................ 4

Buffer Tank ................................................................................................................... 5

System Overview Vertical Ground Loop System ...................................................... 6

System Overview Horizontal Ground Loop System ................................................. 7

System Overview Ground Water with Intermediate Heat Exchanger System ...... 8

System Overview Floor Heating Only ........................................................................ 9

System Overview Heating ,Cooling & Hot Water ................................................... 11

System Overview Multiple Units in Series Cascade Connection ........................... 15

Installation .................................................................................................................. 17

Electrical Connection ................................................................................................. 19

Controller .................................................................................................................... 31

Commissioning and Adjusting .................................................................................. 39

Warning and alarm .................................................................................................... 42

Trouble shooting ......................................................................................................... 46

Maintenance ............................................................................................................... 47

Dimension ................................................................................................................... 48

Components ................................................................................................................ 50

Pressure drop curve ................................................................................................... 56

Temperature and sensor resistance table ................................................................. 60

Technical specifications ............................................................................................. 63

Pre-Installation

Important Site Instructions

 The installation, commissioning, inspection, maintenance and repairs must only be

carried out by a qualified person.

 All electrical wiring must be completed by a licensed electrical contractor in

accordance with the appropriate standards.

 The drilling work requires a permit from your local council.

 The heating system and heat source must be properly designed and dimensioned

to ensure an efficient operation. It is particularly important to keep water flow temperatures as low as possible.

 The minimum heating water flow rate through the heat pump must be assured in

all operating states of the heating system.

Movement and storage

The unit must not be transported, moved or stored at greater than a 30° angle from the upright position. Install and store the unit in a dry area. They are not rated for outdoor use.

Safety

If a refrigerant leak occurs, remove the complete charge using a recovery unit and store the refrigerant in mobile container.

Note: care is to be taken as the refrigerant can breakdown due to high temperature, these refrigerants by-products are dangerous.

Once the leak has been repaired recharge the unit with the correct filling weight and the type found on the unit’s nameplate.

Pre-Installation

Note: ensure the correct refrigerant gas is used to recharge the unit as an incorrect gas can cause damage beyond repair to the compressor.

Do not use oxygen to purge lines or to pressurize a unit for any purpose. Oxygen gas reacts violently with oil, grease and other common substances. Use only refrigerant or dry nitrogen for testing. Never exceed the specified maximum operating pressures.

Do not un-weld or flame cut the refrigerant lines including any refrigerant circuit components until the entire refrigerant (liquid and vapour) has been removed from unit. Traces of vapour should be displaced with dry nitrogen.

Refrigerant in contact with an open flame will produces toxic gases.

Ensure that the necessary safety protection equipment is available when servicing. Have the appropriate fire extinguishers for that system.

Do not siphon refrigerant.

Avoid spilling liquid refrigerant onto the skin or splashing it into the eyes. Use safety goggles. Wash any spills from the skin with soap and water. If liquid refrigerant enters the eyes, immediately and abundantly flush the eyes with water and consult medical advice.

Note: Never apply an open flame or live stream to a refrigerant container. This can dangerously overpressure and cause an explosion.

Pre-Installation

Installation Location and Positioning

 The unit must be installed in a protected area that is free from rain and water

penetration.

 The unit must be installed on a solid level surface, preferably on a concrete pad

not connected to the main house slab foundation.

 Allowances for good ventilation around the installation must be provided.

 In normal operations to prevent condensation collecting on cold pipes the thermal

insulation of any cold components should be to a high level.

 The unit will produce noise that is above the minimum 45 decibel rating.

Therefore the unit should be located so that it is well away from bedrooms, offices, living areas or noise sensitive areas including neighbour’s bedrooms.

 There must be suitable distances between the unit and the building to ensure

normal operation and enough room for maintenance requirements.

Installation Location and Positioning

Buffer Tank

A buffer tank is recommended to ensure a trouble free heat pump operation. A suitable buffer tank can avoid excessive heat pump cycling (switching on and off).

The buffer tank provides a hydraulic separation from the volume flow in the heat pump and heating circuits. The volume flow in the heat pump circuit remains constant, even if the heating circuit volume flow is reduced by thermostatic valves.

If the total of the systems water volume is less than 12L/KW then a buffer tank should be added to reduce the compressor from ON/OFF cycling. This will prolong the compressor life span.

When a buffer tank is installed, the heating system will absorb energy from the buffer tank first. To save energy consumption ,install the indoor pump P1 that is switched on only when compressor is on. This is by changing EV01 to “1”.

RT sensor should be taken out of the unit and put into buffer tank’s sensor pocket. The RT sensor is located at lower submerged sensor pocket of the plate heat exchanger. The RT sensor in the buffer tank will control the tank temperature by starting and stopping the compressor and pump together as required.

If RT sensor has not been changed to buffer tank’s sensor pocket when EV01 has been changed to “1”, when the unit reaches its set temperature ,the compressor will stop, pump P1 will also stop accordingly due to EV01 being set to “1”. When this occurs ,there is no water circulation between the heat pump and buffer tank. RT will keep its stopped temperature ,not the buffer tank water temperature. RT then can not switch on compressor and pump P1 even when buffer tank water is getting cold. Changing the RT sensor into the buffer tank will avoid this problem.

Buffer Tank

System Overview Vertical Ground Loop System

Name

Description Location Name Description Location

Outdoor side water

pump

External OT

Outdoor temperature

sensor

Internal

SAK

Safety valve External FL Particle filter External

Brine tank/expansion

tank

External

Systems Overview (Outdoor side)

System Overview Horizontal Ground Loop

System

Name

Description Location Name Description Location

Outdoor side water

pump

External OT

Outdoor temperature

sensor

Internal

SAK

Safety valve External FL Particle filter External

Brine tank/expansion

tank

External

Systems Overview (Outdoor side)

System Overview Ground Water with

Intermediate Heat Exchanger System

Name

Description Location Name Description Location

P2 Outdoor side water pump External OT

Outdoor temperature

sensor

Internal

P3 Ground water pump External FL Particle filter External

Brine tank/expansion

tank

External SAK Safety valve External

FW Water flow switch External FI filter External

Intermediate heat

exchanger

External

Principle of Operation:

An intermediate heat exchanger (DP) should be installed to prevent ground water damaging or contaminating the unit’s internal heat exchanger. A plate heat exchanger that is able to be cleaned is recommended for this situation that can be disassembled for cleaning and repair or any damage plates can be replaced. Anti-freezing measurement must be adopted to protect the ground water circuit.

Systems Overview (Outdoor side)

System Overview Floor Heating Only

Name

Description Location Name

Description Location

Indoor side water

pump

External RT

Indoor side inlet water

temperature sensor

Internal

EXP

Expansion tank External ST

Indoor side outlet water

temperature sensor

Internal

AIV

Air vent valve External STo

Outdoor side outlet water

temperature sensor

Internal

SAK

Safety valve External ET Exhaust gas temperature sensor Internal

Automatic water

supplement valve

External FL filter External

Systems Overview (Indoor side)

1. Heating Mode Working Principle:

a. When SF04=0, When the RT drops below ST02-ST04, the compressor will start to heat until RT

≥

ST02+ST04. Then compressor will stop. The Compressor will start again when RT

≤

ST02-ST04.

b. When SF04=1, ST02 is replaced by “Set temperature at heating” =ST05+ST06/10 *(ST05-OT). Refer to page 36 “Heating compensation curve setting” and page 37 “Three curves of different ST05 setting”

Systems Overview (Indoor side)

System Overview Heating ,Cooling & Hot

Water

(External water pump, three way valve and electric heater)

Name

Description Location Name

Description Location

P1 Indoor side water pump External RT

Indoor side inlet water

temperature sensor

Internal

ELK

Electric heater/boiler External ST

Indoor side outlet water

temperature sensor

Internal

EXP

Expansion tank External STo

Outdoor side outlet water

temperature sensor

Internal

VXV

Three way valve External HT Hot water temperature sensor Internal

Automatic water

supplement valve

External ET Evaporator temperature sensor Internal

SAK

Safety valve External FL Particle filter External

VVB

Hot water cylinder External AIV

Air vent valve External

Systems Overview (Indoor side)

System Overview Heating ,Cooling & Hot Water

(External water pump, three way valve and electric heater)

1. Heating Mode Working Principle:

On heating mode, Three way valve (VXV) will open AB-A.

1.) When SF04=0:

a. When the RT drops below ST02-ST04, the compressor will start to heat until

RT≥ST02+ST04. Then compressor will stop. The Compressor will start again when RT<ST02-ST04.

b. When the outdoor temperature meets the conditions of OT≤ST07,

the e

lectric

heater (ELK) will be activated as heating boost. It will stop heating when OT ≥ ST07+ST08.

2.) When SF04=1:

ST02 is replaced by “Set temperature at heating” =ST05+ST06 *(ST05-OT). Refer to page 36 “Heating compensation curve setting” and page 30 “Three curves of different ST05 setting”

3.) Cooling Mode Working Principle:

On cooling mode, Three way valve (VXV) will open AB-A.

When the RT≥ST01+ST03, the compressor will start to cool until RT≤ ST01-ST03. Then compressor will stop. The Compressor will start again when RT≥ST01+ST03.

4.) Hot water production working principle:

On hot water mode, Three way valve (VXV) will open AB-B.

When domestic hot water requirement calls, the three way revert valve (VXV) will have the priority to revert to the hot water tank (VVB). After the domestic hot water reach its set temperature ST09, the three way revert valve (VXV) return to its

heating/cooling position. After HT≤ST09 – ST10, three way revert valve (VXV) will revert to hot water circuit again.

Systems Overview (Indoor side)

System Overview Floor Heating with Hot Water

(Internal water pump, electric heater and three way valve)

Name

Description Location Name

Description Location

P1 Indoor side water pump Internal(Option) RT

Indoor side inlet water

temperature sensor

Internal

EXP

Expansion tank External ST

Indoor side outlet water

temperature sensor

Internal

VXV

Three way valve Internal(Option) STo

Outdoor side outlet water

temperature sensor

Internal

ELK

Electric heater Internal (option) HT Hot water temp. sensor Internal

SAK

Safety valve External ET Exhaust gas temp. sensor Internal

Automatic water

supplement valve

External FL Particle filter External

VVB

Hot water tank External AIV Air vent valve External

Systems Overview (Indoor side)

System Overview Floor Heating with Hot Water

(Internal water pump ,electric heater and three way valve)

1. Heating Mode Working Principle:

On heating mode, Three way valve (VXV) will open AB-A.

1.) When SF04=0:

a. When the RT drops below ST02-ST04, the compressor will start to heat until

RT≥ST02+ST04. Then compressor will stop. Compressor will start again when RT≤ST02-ST04.

b. When the outdoor temperature meets the conditions of OT≤ST07,

the e

lectric

heater (ELK) will be activated as heating boost. It will stop heating when OT ≤ ST07+ST08.

2.) When SF04=1:

ST02 is replaced by “Set temperature at heating” =ST05+ST06 *(ST05-OT). Refer to page 36 “Heating compensation curve setting” and page 37 “Three curves of different ST05 setting”

2. Hot water production working principle:

On hot water mode, Three way valve (VXV) will open AB-B.

heating position. After HT≤ST09 – ST10, three way revert valve (VXV) will revert to hot water circuit again.

Important

The coil heat exchanger inside the hot water cylinder VVB should be well selected to have big enough diameter and heat exchange capacity. Otherwise, heat pump will have high outlet water temperature protection alarm AL05 frequently

．

．．

．

Systems Overview (Indoor side)

System Overview Multiple Units in Series

Cascade Connection

Name

Description Location Name

Description Location

P1 Indoor side water pump

Internal

(option)

Indoor side inlet water

temperature sensor

Internal

EXP

Expansion tank External ST

Indoor side outlet water

temperature sensor

Internal

SAK

Safety valve External HT Hot water temperature sensor Internal

Automatic water

supplement valve

External STo

Outdoor side outlet water

temperature sensor

Internal

CV Non-return valve External ET Exhaust gas temp. sensor Internal

FL Particle filter External VVB

Hot water cylinder External

AIV

Air vent valve External

Systems Overview (Indoor side)

System Overview Multiple Units in Series Cascade Connection

(1) Heating working principle

To set two or more units in parallel operation, set the primary unit to the required parameters, other units could have 2~5°C difference of ST01,ST02 and ST05 to allow for energy stage control.

1. When SF04=0:

a). if the RT (inlet water temperature) is lower than ST02-ST04 of the unit, then the unit will start to heat. The unit with the lower ST02+ST04 will stop first, the others will stop as well if the RT continues to rise and be over its ST02+ST04.

b). RT will drop when units stop. The unit with the higher ST02-ST04 will start first again to heat . If this unit can meet the heating capacity then its RT will not drop any further, only this unit will run as required. If the heating load is bigger than the capacity of one unit then the RT will continue to drop to below the second unit ST02-ST04 , the second unit will start increasing the heating capacity.

2. When SF04=1:

ST02 is replaced by “Set temperature at heating” =ST05+ST06 *(ST05-OT). Refer to page 36 “Heating compensation curve setting” and page 37 “Three curves of different ST05 setting”

(2) Hot water production working principle:

On hot water mode, Three way valve (VXV) will open AB-B. When domestic hot water requirement calls, the three way revert valve ( VXV) will have the priority to revert to the hot water tank (VVB ). After the domestic hot water reach its set temperature ST09, the three way revert valve ( VXV) return to heating circuit position. After HT<ST09 – ST10, three way revert valve (VXV) will revert to hot water circuit again.

Important

．

．．

．

Systems Overview (Indoor side)

Installation

Installation must be carried out in accordance with current Standards and Building Codes．The heat pump does not come fitted with shutoff valves and these must be fitted outside of the heat pump to facilitate future service．

Important

The pipe work must be flushed before the heat pump is connected so that any contaminant does not damage the unit’s internal component parts．．．．

Ground Loops:

1. When dimensioning the ground collectors, consideration must be given to the

geothermal location, type of rock, soil structure and the size of the heat pump．

When installing the collector pipe ensure it rises constantly towards the heat pump to avoid air pockets. If this is not possible install high points to vent the air. The ground collectors must be free of all air.

3. All brine pipes that enter any rooms must be insulated against condensation. The

expansion tank (BK) must be installed as the highest point in the collector system and on the incoming pipe before the brine pump. Note: Condensation may drip from the expansion tank. Position the expansion tank so that it isn’t in the way of

other equipment．

4. When installing the circulation pump for the brine circuit, position the electric

connection at the 12 o’clock position to prevent ingress of condensate.

5. Ensure adequate thermal and sound insulation of all pipes routed through wall

apertures.

6. Thermally insulate pipes on the inside buildings and installed with a vapour seal.

As the temperature of the ground collector system can fall below 0°C, the fluid must be protected against freezing down to –15°C. The details of the types of antifreeze used are to be left near the unit for future servicing.

7. Shut-off valves should be installed as close to the heat pump as possible．

8. In the case of a connection to an open ground water system, an intermediate

frost-protected circuit must be provided, due to the risk of dirt and freezing that could occur in the evaporator, this requires an extra exchanger.

IMPORTANT:

The recommended ground loop pipe length must be adjusted according to the local conditions. The length of the collector pipe varies depending on the rock/soil conditions and on the heating system, i.e. radiators or floor heating. Max length per collector should not exceed 200m.

Installation

9. Where there is more than one ground loop these must be connected in parallel

with a means of adjusting the flow. For surface soil heat, the pipe should be buried at a depth of about 1.8 meters and the distance between the hoses should be at least 1 meter.

10. For bore holes the distance between the holes must be at least 15m.

11. Installation should be inspected before it is commissioned. The inspection must be

carried out by a suitably qualified person and should be documented. The above applies to closed loop heating systems as well. If the heat pump is replaced the installation must be re-inspected again.

12. After filling the brine ,check circuit pressure. The pressure should be approx 2 bar.

Minimum system pressure 1 bar, Max pressure should not be over 3 bar.

Pipe Connections (Indoor Side):

1. Pipe connections for the indoor side are located on the top of the unit.

2. Ensure all required safety devices, shut-off valves (as close to the heat pump as

possible) and particle filter are fitted．The safety valve must have a maximum 3 bar opening pressure and be installed on the water outlet.

3. An expansion vessel that is the correct size for the system must be installed.

Ensure that the diaphragms and seals of the expansion vessel including any safety valves are suitable for the heat transfer medium.

4. The entire length of the overflow water pipe from the safety valves must be

inclined to prevent water pockets and must also be frost proof if required.

5. Thoroughly flush the heating system.

6. Carry out a leak test.

7. Operating pressure: 2 bar. Max pressure must not be over 3 bar.

Installation

IMPORTANT:

When connecting to a system with thermostats on all radiators a bypass valve must be fitted, or some of the thermostats must be removed to ensure sufficient flow through the heat pump.

Electrical Connection

Q13 Q14

Q34Q24

Q44

Q54

Q64

Q23 Q74 Q84 Y1

G0 Y2

A+ B-

GND

RJ45

D1 M D3D2 M MD4 D5 X1 G ND X3X2 X4 X5GND GND

+5V

X6 +24V

RS485

SIEMENS

RWR470.10

Terminal Assigments Terminal Assignments

G Power supply AC/DC 24 V Q13 Supply 1 (AC 24 V …230 V)

G0 Power supply ground Q14 Compressor 1

PE Saftey ground Q24 Compressor 2

Q34 Indoor water pump

X1 Inlet water temperature of indoor side Q44 Outdoor water pump

X2 Outlet water temperature of indoor side Q54 4-way valve

X3 Outdoor ambient temperature Q64 Electric heater or boiler

X4 Hot water temperature

X5 Outlet water temperature of outdoor side Q23 Supply 2 (AC 24 V …230 V)

Exhaust gas temperature/return gas temperature

Q74 Hot water pump or revert valve

GND Common reference point for analog input Q84 Alarm

+5 V DC 5 V power output for active sensor Y1 Analog output 2, 0...10 V

+24 V DC 24 V power output for active sensor GND Common reference point

Y2 Analog output 2, 0...10 V

D1 Water flow switch

D2 Low pressure switch A+ A+ connector for RS485

D3 high pressure switch B- B- connector for RS485

D4 Air conditioner switch GND Optional for RS485 communication

D5 Hot water switch RJ45

Service interface for parameters uploading and downloading

M Common reference point for digital input

Warning:

Electrical connections and servicing must be carried out under the supervision of a qualified electrician．．．．Electrical installation and wiring must be carried out in accordance with Local Standards．．．．

Electrical Connection

Power Connection:

Before connecting the power supply please confirm the unit suits the power supply as unit nameplate.

 Breaker protection must be installed according to the max value stated in the

nameplate attached to the unit inside of front panel.

 The equipment must be installed via an isolator switch with a minimum breaking

gap of 3 mm．

 Disconnect the heat pump before insulation testing the house wiring．

 The unit may be single or three phase, the power supply must conform to the

specification on the unit’s nameplate. The supply voltage must be within the range specified in the electrical data table. For wiring connection, refer to the electric wiring diagram on the inside panel of the unit.

 When the building is equipped with an earth-fault breaker the heat pump should

be equipped with a separated one．

WARNING:

Disconnect the main power supply switch before servicing the system or handling any internal parts of the unit.

In case of any major malfunction turn the unit off, disconnect the mains power supply and contact a qualified service engineer.

Electrical Connection

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HISEER VR2002 Installation Operation & Maintenance

Specifications and Main Features

Frequently Asked Questions

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