Safety And Control Systems; Heat Pump Installation And Connection; Site Selection; Heat Pump Installation - AZURO BP-85HS-A Bedienungs- Und Wartungsanleitung

3.5

SAFETY AND CONTROL SYSTEMS

The heating pump is fitted with the following systems:
Heat pump control based on temperature:
The temperature sensor of evaporator triggers the defrosting process.
The ambient (outdoor) temperature sensor provides for switching the heat pump OFF, if the temperature drops below 7 °C (factory setting). The normal
operation will resume as soon as the ambient temperature has risen to -5 °C (factory setting). For the procedure for changing the factory settings see,
please, chapter 5.3 Operating Parameter Setting and Checking.
The temperature sensor installed on the heat exchanger provides for switching the heat pump OFF, as soon as the water temperature has achieved its required
temperature. The normal operation will resume as soon as the temperature of water in the exchanger has decreased by 2 °C below the set temperature (factory setting).
Safety systems include:
The water flow rate sensor installed at the heat exchanger inlet.
The flow rate sensor switches the heat pump ON, when water is flowing through the exchanger and switches the pump OFF in the moment the water
stops flowing or the flow rate drops below its minimum required value.
The sensor of minimum/maximum gas pressure in the cooling circuit.
The temperature sensor in the compressor delivery line.
Time delay
The equipment is provided with a time-delay device with the set time lag of Z 1÷3 min. for protecting the control devices in the circuit and removal of
repeated restarts and contactor vibrations. This time delay will restart the equipment automatically within approx. 3 minutes after each interruption
of heat pump operation. The time delay will be enabled even in the case of a short interruption of power supply and prevent the equipment from
starting earlier than the pressures are equalised in the cooling circuit. Any interruption of power supply in the course of the delay will not influence
the set time interval.
In the case of failure of any of these systems (if a system defect or disconnection takes place or an abnormal temperature is measured), the relevant error
message is displayed on the screen, see chapter 7.3 Error Messages and Their Removal herein below.
Warning: The removal of any of the safety and control systems or putting it out of operation shall cause cancellation of the guarantee.
4.0

HEAT PUMP INSTALLATION AND CONNECTION

4.1

SITE SELECTION

The heat pump is intended for outdoor installation and will operate well in almost any outdoor environment, provided that the three following
prerequisites are met:
1. Fresh air 2. Electric power
(a) Do not install the heat pump in a contained area with limited access of air, where
the air cannot circulate freely enough. Both the inflow and outflow of air should not
be restricted in any respect. In the working area around the heat pump, as indicated
in the figure, no items can be placed. Do not place the pump among bushes and
shrubs that could restrict the access of air. Any obstacle to free circulation will
reduce the efficiency of heat exchange and can even result in stopping the pump
(b) The equipment shall be installed at a place protected from direct sunlight and
other heat sources, where it can intake air from a naturally sun heated space.
It is further recommended to erect a light roofing above the pump to protect
it from direct sunlight and rain.
(c) Do not place the equipment close to any road where it would come into
contact with products of traffic, as any increased dust content in air will cause
progressive deterioration of heat exchange efficiency.
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3. Piping system including pool water filtration
(d) The air outlet should not be directed to areas, where the increased circulation of cold air may be bothering (windows, terrace, etc.). The air outlet should
not face against the direction of prevailing winds.
(e) The equipment distance from the pool edge shall not be shorter than 3.5 m. It is recommended to install the heat pump at the distance of 7 m from the
pool provided that the overall length of interconnecting pipe system will not exceed 30 m. One should take into account that the longer the pipe, the
greater the heat loss. To get an idea, a 30m long pipe system will show the loss of about 0,6 kW per hour (2000 BTU) for each 5 °C difference between
the temperatures of pool water and the ground (provided that the pipe system is buried in dry ground). Such loss represents the increase of 3-5 % in the
time of heat pump operation.
(f) The equipment shall be placed on a firm and even surface, such as a concrete slab or steel base and the heat pump housing shall be padded with vibration
isolation mounts (rubber silent-blocks) and attached by bolts or screws to the base in order to reduce noise and extend the heat pump service life
(g) The rear side of the evaporator consists of lamellae made of soft metal and is liable to mechanical damage. Therefore, adequate measures should be taken
and suitable site chosen to have the lamellae protected from damage.
Note: If it is intended to use the heat pump for an indoor pool the supplier should be consulted concerning pump placement and its connection to the pool.
4.2

HEAT PUMP INSTALLATION

(a) The heat pump should be used in combination with the filtration unit comprising a part of user's installation of the pool. The flow through the heat pump
should correspond to its recommended value (see Table 3.1 Technical Data) and shall not be more than two times higher. In order to provide for the
proper operation of heat pump the bypass line shall be installed. The system consists of three valves that allow setting the flow rate through the pump
(see chapter 6.2 Operational State Setting Using Bypass).
(b) The heat pump is fitted with inlet and outlet fittings with cap nuts and sealing rubber rings for connecting the pump to D50 pipes. For connection to the
filtration circuit use a D50 PVC tube, or 50/38 reducing fittings that allow using the ø 38 mm hose. The lower and upper fitting should be used for heat
exchanger inlet and outlet, respectively. Before screwing the caps nut on, apply lubricant on the threads.
Insert the D50 tube into the sleeve piece of heat exchanger no less than 1 cm and no more than 2 cm.
Consider also the use of quick couplers for the heat pump inlet and outlet to make easier its connection to and disconnection from the filtration circuit for
draining all water before wintering or commencing maintenance/service works.
(c) The heat pump shall be connected to the pool filtration circuit downstream of the filter and upstream of the water treatment equipment (automatic
chlorine dispenser, ozoniser and so on). A typical connection of filtration circuit is shown on the following figure.
Note: In case the automatic chlorine dispenser is used in the filtration circuit, a check valve with titanium spring shall be installed upstream of the dispenser. Failing this, in the
course of pump standby time chlorine concentration will increase in the exchanger of heat pump above its permissible level and cause damage to the exchanger.
Typical connection of the filtering circuit and the heat pump
Arrow shows air stream
direction through
the heat pump Heat pump
min 0,5 m
Outlet
min 3,5 m
Inlet
Pool
Condensate
drain
NOTE: The manufacturer supplies the heat pump only. Other components shown on the figure comprise the parts of appropriate water supply circuit and shall be provided by the
heat pump user or installer's firm.
Water treatment system
incl. check valve
Bypass valve
Water flowing Water pumped Filtration
to pool from pool pump
Filtration valve
Filtration
vessel
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