Danfoss DHP-AT Installation And Service Instructions Manual
Installation and service
instructions
DHP-AT
VMGFI202
If these instructions are not followed during installation and
service, Danfoss A/S liability according to the applicable warranty is not binding. Danfoss A/S retains the right to make
changes to components and specifications without prior notice.
© 2011 Copyright Danfoss A/S.
The English language is used for the original instructions. Other
languages are a translation of the original instructions.
(Directive 2006/42/EC)
Contents
1 About documents and decals ..................................................... 3
1.1 Introduction .................................................................................... 3
1.2 Symbols in documents ................................................................ 3
1.3 Symbols on decals ........................................................................ 3
1.4 Terminology .................................................................................... 4
2 Important information ................................................................... 5
2.1 General safety precautions ........................................................ 5
2.2 Refrigerant ....................................................................................... 5
2.3 Electrical connection .................................................................... 6
2.4 Water quality ................................................................................... 6
2.5 Commissioning .............................................................................. 7
3 Transport, delivery check and positioning ............................. 8
3.1 Transporting heat pump ............................................................ 8
3.2 Delivery check ................................................................................ 8
3.3 Positioning the heat pump ........................................................ 8
4 The heat pump ............................................................................... 10
4.1 Dimensions and connections ................................................. 10
4.2 Components ................................................................................. 11
4.3 Principle function description ................................................ 12
4.4 Check and safety functions ..................................................... 15
4.5 Heating curves ............................................................................. 15
5 System solution .............................................................................. 17
5.1 System solution ........................................................................... 17
6 Piping installation ......................................................................... 18
6.1 Pipe connection .......................................................................... 18
6.2 Connecting cold and hot water lines .................................. 18
6.3 Connecting supply and return lines ..................................... 19
6.4 Noise and vibrations .................................................................. 19
7 Electrical installation .................................................................... 21
7.1 Connecting the operator panel ............................................. 21
7.2 Connecting circulation pump ................................................ 22
7.3 Connecting hot water tank electrical heater .................... 23
7.4 Connecting external electrical heater ................................. 24
7.5 Connecting hot water sensor ................................................. 24
7.6 Connecting buffer tank sensor .............................................. 24
7.7 Connecting reversing valve hot water ................................ 25
7.8 Connecting the power supply ............................................... 26
8 Operator panel ............................................................................... 27
8.1 Important parameters ............................................................... 27
9 Commissioning .............................................................................. 28
9.1 Checking piping installation and heating system .......... 28
9.2 Checking electrical installation .............................................. 28
9.3 Filling hot water tank and heating system and
expelling excessive air ............................................................... 28
9.4 Starting the unit .......................................................................... 28
9.5 Test Operation
............................................................................. 29
9.6 After start-up and tests ............................................................. 29
9.7 Customer information ............................................................... 30
10 Troubleshooting ............................................................................ 31
10.1 Operational problems ............................................................... 31
11 Technical data ................................................................................. 33
12 Connection diagram .................................................................... 34
13 Wiring diagram .............................................................................. 35
VMGFI202 – 1
1 About documents and decals
1.1 Introduction
The following information is available for this product:
•
Installation and service instructions containing information to install and commission a heat pump installation,
information about the heat pump’s function, information about accessories, technical data, troubleshooting and maintenance instructions (this document).
•
User instructions on how to operate the unit (the user manual).
1.2 Symbols in documents
The instructions contain different warning symbols, which, together with text, indicate to the user that there are
risks involved with actions to be taken.
The symbols are displayed to the left of the text and three different symbols are used to indicate the degree of
danger:
DANGER! Indicates an immediate danger that leads to fatal or serious injury if necessary measures are not
taken.
Warning! Risk of personal injury! Indicates a possible danger that can lead to fatal or serious injury if
necessary measures are not taken.
Caution! Risk of installation damage. Indicates a possible hazard that can lead to item damage if necessary
measures are not taken.
A fourth symbol is used to give practical information or tips on how to perform a procedure.
Note! Information regarding making the handling of the installation easier or a possible operational
technical disadvantage.
1.3 Symbols on decals
The following symbols can occur on decals on the different parts of the heat pump. Which symbols are used
depends on the heat pump model.
Warning symbols
!
Warning, danger!
Warning, hazardous electrical voltage!
Installation and service instructions VMGFI202 – 3
1.4 Terminology
Term Meaning
Heating system/Heat transfer fluid
circuit
The circuit that generates heat to the property or to the domestic hot water tank heater.
Supply line The heating system’s supply line with flow direction from the heat pump to radiators/
under floor heating or domestic hot water tank heater.
Return line The heating system’s return line with flow direction from radiators/under floor heating
or domestic hot water tank heater to the heat pump.
Circulation pump Circulation pump for heating system.
Refrigerant circuit The energy carrying circuit between the outdoor air and heating system.
Refrigerant The gas/liquid that circulates in the refrigerant circuit.
Domestic hot water Domestic hot water is the water that you use around the house or office for everyday
applications, like showers, cleaning, laundry, or dishes.
Buffer tank Buffer tank is installed for equalisation of the temperature for the heating system and to
guarantee sufficient energy when defrosting.
4 – Installation and service instructions VMGFI202
2 Important information
2.1 General safety precautions
Warning! Risk of personal injury! Children are not permitted to play with the product.
Caution! The heat pump must be installed by authorised installation engineers and the installation must
follow the applicable local rules and regulations as well as these installation instructions.
Caution! This product is not intended for persons (including children) with reduced physical, sensory or
psychological capacity, or who do not have knowledge or experience, unless supervised or they have
received instructions on how the apparatus functions from a safety qualified person.
Caution! When cooling it is important to limit the lowest flow line temperature to prevent condensation.
2.2 Refrigerant
2.2.1 Fire risk
The refrigerant is not combustible or explosive in normal conditions.
2.2.2 Toxicity
In normal use and normal conditions the refrigerant has low toxicity. However, although the toxicity of the refrigerant is low, it can cause injury (or be highly dangerous) in abnormal circumstances or where deliberately abused.
Warning! Risk of personal injury! Spaces in which heavy vapour can collect below the level of the air must
be well ventilated.
Refrigerant vapour is heavier than air and, in enclosed spaces below the level of a door for example, and in the
event of leakage, concentrations can arise with a resultant risk of suffocation due to a lack of oxygen.
Warning! Risk of personal injury! Refrigerant exposed to a naked flame creates a poisonous irritating gas.
This gas can be detected by its odour even at concentrations below its permitted levels. Evacuate the area
until it has been sufficiently ventilated.
2.2.3 Work on the refrigerant circuit
Caution! Work on the refrigerant circuit must only be carried out by a certified engineer!
Caution! When repairing the refrigerant circuit, the refrigerant must not be released from the heat pump it must be dealt with in the appropriate way.
Installation and service instructions VMGFI202 – 5
Refilling must only be carried out using new refrigerant (for the amount and type of refrigerant see manufacturer’s
plate) through the service valves.
Caution! All warranties from Danfoss are void if, when filling with refrigerant other than Danfoss A/S
specified refrigerant, if there has not been written notification that the new refrigerant is an approved
replacement refrigerant together with other remedies.
2.2.4 Scrapping
Caution! When the heat pump is to be scrapped the refrigerant must be extracted for disposal. Local rules
and regulations related to the disposal of refrigerant must be followed.
2.3 Electrical connection
DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to
the risk of electric shock. All power supplies must be isolated before electrical installation is started. The
heat pump is connected internally at the factory, for this reason electrical installation consists mainly of
the connection of the power supply.
Warning! Electrical installation may only be carried out by an authorised electrician and must follow
applicable local and national regulations.
Warning! The electrical installation must be carried out using permanently routed cables. It must be
possible to isolate the power supply using a multi-pole circuit breaker with a minimum contact gap of 3
mm.
2.4 Water quality
Caution! A normal heating system always contains a certain amount of corrosion particulates (rust) and
sludge products from calcium oxide. This comes from acid that is naturally occurring in the fresh water
that the system is filled with. It is not good practice to have to fill the heating system regularly which is
why any leakage in the heating system should be repaired immediately. Normal filling should occur only
once or twice a year. The water in the heating system should be as clean as possible, always position the
dirt filter on the return line from the heating system to the heat pump, as close to the heat pump as
possible.
Caution! Hard water; Normally it is not a problem installing a heat pump in areas with hard water because
the normal operating temperature for the hot water does not exceed 60°C. In areas where there are
exceptional prevailing conditions with the water one can install a softening filter, which softens the water,
cleans any impurities and prevents the build up of calcification.
6 – Installation and service instructions VMGFI202
2.5 Commissioning
Caution! The installation may only be commissioned if the heating system is filled and all excessive air is
expelled. Otherwise the circulation pump may be damaged.
Installation and service instructions VMGFI202 – 7
3 Transport, delivery check and positioning
3.1 Transporting heat pump
Caution! The heat pump must always be transported and stored standing and in a dry environment. If the
heat pump is laid on the incorrect side it may become seriously damaged as the oil in the compressor can
run out in the pressure pipe and therefore prevent normal function.
Caution! Always secure the heat pump so that it cannot tip over during transportation.
3.2 Delivery check
1. Check that there is no transport damage.
2. Remove the packaging and check that the delivery contains the following components.
Table 1. Supplied contents
Quantity Name
1 Heat pump
1 Control unit with connection cord
1 Document set
1 Flexible hose for drainage of condensate water
2 1pc Buffer tank sensor, 1pc Domestic hot water tank sensor
3.3 Positioning the heat pump
3.3.1 Recommended location
When positioning the heat pump, note the following:
Caution! The heat pump must be installed outdoors and secured on a stable base, for example a cast
foundation. All four mounting points must be secured to the base.
Caution! Incorrect positioning of the heat pump risks reduction of performance.
•
Use M10 bolts for fastening the frame to the the base.
•
Select a position with good ventilation and with enough free space for installation and maintenenance.
•
Do not select a position that will block the air flow near the inlet or outlet areas.
•
No barrier allowed closer than 30 cm behind the unit.
•
Check with a spirit level that the heat pump is installed horizontally.
•
Ensure that condensated water is well drained from the unit. A flexible hose is available as accessory for drainage. If there is a freezing risk, use a heat cable inside the hose.
8 – Installation and service instructions VMGFI202
Figure 1. Positioning heat pump
Note! Avoid placing the heat pump near windows or walls to noise sensitive areas.
Note! Ensure that there is sufficient distance to neighbouring properties so that they are not exposed to
noise. Applicable local regulations must be followed.
Note! The heat pump should not be enclosed.
Note! Keep the heat pump and its immediate area free of snow, ice, leaves etc.
Installation and service instructions VMGFI202 – 9
4 The heat pump
4.1 Dimensions and connections
The dimensions and connections of the heat pump is described in the pictures and tables below.
1
2
3
Figure 2. Dimensions
Pos Description 6kW 8kW
1 Height 655 mm 755 mm
2 Width 1026 mm 1026 mm
3 Deepth 495 mm 495 mm
1
2
Figure 3. Piping connections (rear side)
Pos Description 6kW 8kW
1 Supply line
pipe (red label)
DN 20
DN 25
2 Return line pipe
(blue label)
DN 20
DN 25
10 – Installation and service instructions VMGFI202
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