Dimplex KWP 300 Installation And Operating Manual
Installation and Operating Manual
Heat Pump for Cooling of Domestic Water
with Airduct Connection
KWP 300
451902.67.39 FD8411
2
TABLE OF CONTENTS
Page
1. Regulations / Safety Notices 3
2. Description 4
2.1 Refrigeration Cycle 4
2.2 Water Circuit 4
2.3 Safety and Control Devices 5
3. Storage / Transport 6
3.1 General Requirements 6
4. Installation 6
4.1 Installation Site 6
4.2 Installation 7
5. Mounting 7
5.1 Connection of Water Piping 7
5.2 Electrical Connection 8
6. Commissioning 8
6.1 Domestic Water Circuit 8
6.2 Operation of the Heat Pump for Cooling of Domestic Water 9
7. Maintenance / Service 10
7.1 Water Circuit 10
7.2 Air Circuit 10
7.3 Sacrificial Anode 11
8. Malfunctions / Troubleshooting 12
9. Decommissioning 12
10. Environmental Requirements 12
11. APPENDIX
11.1 Refrigeration Cycle with Legend 13
11.2 Hydraulic Plumbing Diagram 14
11.3 Circuit Diagram 15
11.4 Technical Data 16
(
HPCDW = abbreviation used in the following for Heat Pump for Cooling of Domestic Water
)
3
1. Regulations / Safety Notices
(
This installation and operating manual must be read prior to starting up the unit !
)
¾¾¾¾####
The heat pump for cooling of domestic water (short: HPCDW) is designed exclusively for the cooling (in part
also for the heating) of domestic or potable water within the specified operating temperature limits! The cooling
(or heating) of liquids other than drinking water is not permissible. The technical regulations for the drinking
water installation (DIN 1988) must be adhered to.
¾¾¾¾####
The air supplied to the unit should not exceed a temperature of +45 °C. The energy-efficient operation of the
heat pump decreases as the air temperature increases.
¾¾¾¾####
The following is not permitted:
- operation using exhaust air posing an explosion hazard or containing solvents
- use of exhaust waste air laden with grease, dust or sticking aerosols
- connection of exhauster hoods to the ventilation system
¾¾¾¾####
The unit must not be installed:
- outdoors
- in rooms with a danger of freezing
- in wet rooms (e.g. bathrooms)
- in room with an explosion hazard due to gases, vapours or dust
¾¾¾¾####
The operation of the unit is not permitted:
- with empty storage tank
- during the construction phase
¾¾¾¾
In the design and construction of the HPCDW all relevant EC directives were complied with. (See also EC
Declaration of Conformity.)
¾¾¾¾
The qualified expert must ensure that prior to the commencement of any maintenance/repair activities on
refrigerant-carrying parts, the refrigerant has been removed to such an extent as necessary for the safe
performance of this work. The refrigerant must be handled and disposed of in accordance with applicable
regulations and must not be released into the atmosphere! (Refrigerant R134a is CFC-free, non-flammable
and has no ozone-depleting properties.)
¾¾¾¾####
When working on the HPCDW, the unit must always be disconnected from the power source.
¾¾¾¾####
The electrical connection of the HPCDW must be performed according to and conforming with all relevant
VDE, EN and IEC standards. Beyond that, the technical connection requirements of the local utility company
have to be observed.
Caution!
Any work on the cooling/domestic water heat pump may only be performed by qualified persons! All
relevant accident prevention regulations have to be observed !
4
2. Description
The
HPCDW
is a domestic water cooling unit ready for connection and essentially consists of a domestic water
tank, the components of the refrigeration, air and water circuits as well as all control, regulating and monitoring
devices required for automatic operation.
In accordance with the heat pump's principle of operation, unwanted heat is extracted from the domestic water and
then transferred to the discharged outlet air.
The unit is equipped as standard with an electric immersion heater (1.5 kW) which enables domestic water to be
heated (up to a temperature of max. 85 °C) (heating function).
2.1 Refrigeration Cycle
(Heat Pump Principle of Function)
The refrigeration cycle is a closed system in which the refrigerant R134a circulates as an energy carrier. In a
tubular evaporator wrapped around the domestic water tank, heat is extracted from the domestic water at a low
evaporation temperature and transferred to the refrigerant. The vaporous refrigerant is drawn in by an electrically
driven compressor and compressed to a higher pressure/temperature level and then passed to the condenser (fintype heat exchanger), where the heat that is absorbed in the tubular evaporator and part of the heat of the
compressor motor is transferred to the drawn-in exhaust air. Subsequently, the high condensing pressure is
reduced by means of a throttling device (expansion valve) to the level of the evaporating pressure, and the
refrigerant can again absorb heat from the domestic water tank via the tubular evaporator.
2.2 Water Circuit
The water circuits of the
HPCDW
are to be field-installed (by the customer). The water connections (Fig. 1) are
located at the rear of the unit.
Fig. 1: Water connections
Brauchwasserzulauf
R1" Außengewinde
Brauchwasserentnahme
R1" Außengewinde
20 - 35
0
1226
55
1620
1660
Ø
160
Ø
160
660
Domestic water supply
external thread R1“
Domestic water outlet tap
external thread R1“
5
2.3 Safety and Control Devices
The HPCDW is equipped with the following safety features:
2.3.1 High-pressure pressostat (HD)
The high-pressure pressostat protects the heat pump from excessive operating pressures in the refrigeration cycle.
In the case of a malfunction, the pressostat switches off the heat pump; the heat pump is restarted automatically as
soon as the pressure in the refrigeration cycle has dropped to an acceptable level.
2.3.2 Safety temperature limiter for immersion heater (STL)
The STB protects the hot water installation from
excessive temperature increases.
When the preset switching value (99 °C) is exceeded, the
immersion heater is switched off.
The immersion heater cannot be restarted unless the hot
water temperature has fallen to ≤ 90 °C and the reset
button (Fig. 2) on the STB has subsequently been
pressed (may be performed by qualified personnel only!).
Fig 2: Resetting STL
2.3.3 Temperature controller for immersion heater (TC)
The temperature controller for the immersion heater controls the temperature of the water for domestic use during
the immersion heater mode of operation. The maximum temperature of this controller has been factory-set to 65 °C
(the controller is installed with the STL in a common casing). The temperature setting can be changed with the aid
of a suitable tool (see Fig. 2). Changing this setting may be performed by qualified persons only!
In the immersion heater mode, which can only be turned on manually, the domestic water is heated up to the
preset maximum temperature of the immersion heater.
2.3.4 Temperature controller of HPCDW
Temperature control in the domestic water storage tank and the control of the compressor operation is taken over
by the temperature controller. The latter senses the water temperature by means of a sensor and regulates it as a
function of the preset setpoint. The desired temperature level (setpoint) can be adjusted via the dial on the
operating panel.
85°
30°
B3
F2
STB
Partition
Panel
Reset button
6
3. Storage and Transport
3.1 General Requirements
As a rule, the CWP is to be stored or transported in its shipping box in upright position and
without water charge
.
For a transport over short distances, and provided due care is exercised, an inclination angle of up to 45° is
permitted. Both during transport and storage, ambient temperatures of -20 to +60 °C are permissible.
3.1.1 Transport using a forklift
(or lift truck)
When transported by a fork lift, the HPCDW must remain mounted on the pallet. The lifting rate should be kept to a
minimum. Due to its top-heaviness, the HPCDW must be secured against tipping over. To prevent any damage, be
sure to place the HPCDW on a level floor.
3.1.2 Manual transport
For the manual transport, the wooden pallet can be used for the bottom part. Using ropes or carrying straps (which
can be placed around the jacket of the storage tank and secured to the water tube nipples), a second or third
handling configuration is possible. With this type of handling (applies to the transport by hand truck as well), care
must be taken that the
max. permissible inclination angle of 45°
is not exceeded (see Figure). If transport in an
inclined position cannot be avoided, the HPCDW ("heat pump" switch) should be taken into operation one hour
after it has been moved into final position at the earliest.
Caution! Do not lift the unit by its cover
(the cover is not designed to withstand the weight of the unit !)
4. Installation
4.1 Installation Site
CAUTION!
¾#
The HPCDW must be sited in a
dry and freeze-proof room
, the room air temperature and/or the air taken in
by the HPCDW must be within a temperature range of 20°C to 45 °C (required for heat pump operation).
¾#
In addition, the unit
must not
be installed in rooms where there is an explosion hazard due to gases, vapours
or dust.
¾#
The air drawn in must be not excessively contaminated or heavily laden with dust.
¾#
The floor surface must have adequate load bearing capability (the estimated HPCDW weight is 400 kg when
fully loaded!).
For trouble-free operation as well as for the performance of maintenance and repair work, provide clearance of at
least 0.6 m all around the unit, furthermore, a minimum ceiling height of approx.
2.50 m
is required
for operation
without airducts or airduct elbows
(➠"free-blowing“ installation“) (see Fig. 4). The connection to the HPCDW is
effected (optionally) by means of airducts (NW 160) which must not exceed a
total
length of 10 m.
Fig. 3: Transport of the unit
°
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