Enerflow Eskom ERHP-SU08 User manual

1
Residential Heat Pump
User Manual
Revision 8
PLEASE READ THIS MANUAL BEFORE
OPERATING THE HEAT PUMP
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Index
1. Safety Cautions and Warnings ........................................................................3
2. Heat Pump Controller Functions.....................................................................4
2.1 CONTROLLER AND BUTTON FUNCTIONS ........................................................................4
2.2 HEATING MODE....................................................................................................................5
2.3 TIME AND DAY FUNCTION ..................................................................................................6
2.4 TIMER FUNCTION.................................................................................................................6
2.5 WATER DISINFECTION CYCLE...........................................................................................7
2.6 CROSS-OVER SWITCH........................................................................................................7
2.7 HEAT PUMP OPERATING PARAMETERS ..........................................................................8
2.8 MICRO CIRCULATION FUNCTION.....................................................................................10
3. Troubleshooting..............................................................................................11
4. Service and Maintenance ...............................................................................13
5. Performance Specifications...........................................................................14
5.1 MODEL ERHP-SU08............................................................................................................14
5.2 MODEL ERHP-SU14............................................................................................................15
6. Installation Handover......................................................................................16
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1. Safety Cautions and Warnings
Warning: It is the responsibility of the user to operate and use the heat pump according to
the instructions detailed in this manual. The user shall ensure that the health and safety of
any other person in the area or site near where the heat pump is installed is not endangered
by his conduct or activities when operating the heat pump.
Warning: This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety.
Warning: Children should be supervised to ensure that they do not play with the appliance.
Warning: Ensure that the electricity installation complies with local standards and
regulations. This appliance must be installed in accordance with the national wiring
regulations as contained in SANS 10142.
Caution: Installation and maintenance must only be performed by qualified personnel who
are familiar with local codes and regulations.
Warning: Ensure that the electricity/power supply is switched off before any installation
work begins. Note that electric shock is dangerous and can cause death.
Warning: Do not turn off main power supply to the heat pump during a vacation or if not
in use. The heat pump must have electricity in order to protect itself during cold climate
conditions. It is recommended that the target temperature be set to 25 °C in order to save
electricity during prolonged periods of non-use.
Warning: Do not turn the unit off and immediately on again. Allow 30 seconds for the
refrigerant pressure to equalize.
Caution: There are some sharp edges within the unit that may cause injury.
Caution: Note that the unit contains a rotating fan that may cause injury if the protective
grid is removed. Ensure not to touch or work on the unit while in operation.
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2. Heat Pump Controller Functions
2.1 Controller and Button Functions
The heat pump makes use of an intelligent controller and LCD screen. The LCD screen is used to
change or view various operating parameters. The controller contains the following interface and
keyboard buttons:
Heating with Heat Pump
Heating with Electric
Element
Current Water
Temperature
Timer
Time
Desired Water
Temperature
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2.2 Heating Mode
Once the system is switched on at the main power, the intelligent controller will go into initialization
mode for a few seconds after which the time will be displayed as 00:00. The unit is now ready for
operation.
Note:
The user can select between two heating modes by simply pressing
1. Normal heating mode (heat pump only)
2. Fast heating mode (heat pump and electric element)
Warning: Do not turn off main power supply to the heat pump during a vacation
or if not in use. The heat pump must have electricity in order to protect itself
during cold climate conditions. It is recommended that the target temperature be
set to 25°C in order to save electricity in periods of non-use.
Normal
Heating Mode
Fast Heating
Mode
Initialization
Phase
Ready for
Operation
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2.3 Time and Day Function
In order to set or change the time and day parameters the following procedure should be followed:
During the standby or running mode, press the
button once so that the Day parameter flashes.
Make use of the or button to change the Day
parameter (0=Sunday…6=Saturday).
Press the button once so that the Hour position
flashes.
Make use of the or button to change the Hour
parameter.
Press the button so that the Minutes position
flickers.
Make use of the or button to change the
Minutes parameter.
Press to acknowledge the setting.
Note:
To lock or unlock the intelligent controller, press and hold the button and the buttons
simultaneously for a few seconds.
2.4 Timer Function
To select a period when the heat pump should not be in operation, such as during high electricity
demand in the household due to other appliances or during the night, the timer function can be
used to keep the heat pump switched off. In order to set the timer, use the following procedure:
During the standby or running mode, press the button once to enter Timer 1 ON slot
so that the Hour parameter and the “1 ON”sign
flash.
Make use of the or button to set the Hour
parameter.
Press the button so that the Minutes position
and the “1 ON”sign flash.
Make use of the or button to set the Minutes
parameter.
Press the button so that the Hour parameter
and the “1 OFF”sign flash.
Make use of the or button to set the Hour
parameter.
Press the button so that the Minutes position
and the “1 OFF” sign flash.
Make use of the or button to set the Minutes
parameter.
Press the button to enter Timer 2 ON slot so that the Hour parameter and the “2 ON”
sign flash.
Repeat steps 2 to 7 to set the Timer 2 slot.
Note:
To cancel the timer function, press the button and then the button.
If the unit enters into a Timer zone (1 or 2), the symbols “1/2” and “ON/OFF” will flicker on the
LCD screen.
If the “ON/OFF”times are set the same, the Time zone will be disabled.
Please see table below (example) for when the Timer is active if time zones overlap.
Time Setting
Timer Active
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Time Zone 1
Time Zone 2
Active Time Zone
ON at 08h00
OFF at 10h00
ON at 09h00
OFF at 11h00
ON at 08h00
OFF at 10h00
ON at 08h00
OFF at 10h00
ON at 08h00
OFF at 09h00
ON at 08h00
OFF at 09h00
ON at 08h00
OFF at 11h00
ON at 09h00
OFF at 10h00
ON at 08h00
OFF at 10h00
2.5 Water Disinfection Cycle
The Enerflow heat pump has the ability to disinfect your hot water tank once a week (Monday
mornings at 02h00) from bacteria such as Legionella*. During this process the electric element will
be activated until the target temperature set in parameter 6** (recommended 60°C) is reached
(geyser thermostat set to 60°C as default during installation). This temperature will be maintained
for the time set in parameter 7 (10 to 120 min). The function can be turned on or off by changing
parameter 18 (Off = 0; On = 1; Default = 0).
Note: Once the cycle is active the following sign will flicker:
Warning: Once this function is active the water temperature might be higher than
normal and could cause scalding.
* The pathogenic Gram-negative bacterium that grows in central heating and air conditioning systems at a certain
temperature that can cause Legionnaires' disease.
** Standard geyser maximum temperature is 75°C controlled by the thermostat.
2.6 Cross-Over Switch
During the unlikely event where the heat pump is faulty and does not heat the water in the tank, the
cross-over switch (located on the side of the heat pump) can be used to switch power from the heat
pump directly to the electric element (Auto = Heat pump, On = Element only). Once the power is
switched over to the electric element, it will be controlled by the element thermostat to heat the
water inside the geyser to the thermostat set-temperature. By switching the Cross-over switch to
the “On” position, the heat pump will be disengaged completely.
Warning: Take note that if the thermostat temperature is set higher than what the
heat pump temperature was set at, the water temperature will be higher and could
cause scalding.
Warning: Always ensure that an appropriate and approved geyser thermostat is
installed. When the cross-over switch is engaged, electrical power to the control
of the heat pump is removed. The heat pump will not be able to protect itself
during cold weather conditions and it is therefore recommended that an
authorised installer is contacted as soon as possible to determine the fault and
reinstate the heat pump.
Electric
Element
Only
Heat Pump
Mode
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2.7 Heat Pump Operating Parameters
Some of the heat pump control system operating parameters can be changed by the user if
required. The function and range of all the parameters are explained in the following table:
Parameter
Description
Range
Default
Remark
0
Target Water Temperature*
25 ~ 75 °C
40 °C
Adjustable
1
Difference between measured water temperature
and set temperature.
2 ~ 5 °C
2 °C
Adjustable
2
Defrosting Interval
30 ~ 90 min
40 min
Adjustable
3
Temperature at which Defrosting operation starts
-30 ~ 0 °C
-7 °C
Recommended not
to be changed
4
Temperature at which Defrosting operation stops
2 ~ 30 °C
13 °C
Recommended not
to be changed
5
Duration of Defrosting operation
2 ~ 12 min
8 min
Recommended not
to be changed
6
Target Water Temperature for Disinfecting Cycle
60 ~ 90 °C
60 °C
Adjustable
7
Duration of Disinfecting Cycle
10 ~ 120 min
100 min
Adjustable
8
Micro Circulation Function (Off = 0; On = 1)
0 / 1
0
Adjustable
9
Micro Circulation Cycle Interval
2 ~ 60 min
2 min
Adjustable
10
Installer Function
1 ~ 10 min
3 min
Do not change
11
Installer Function
70 ~ 100 °C
90 °C
Do not change
12
Installer Function
5 ~ 30 °C
20 °C
Do not change
13
Compressor Discharge Protection temperature
90 ~ 125 °C
105 °C
Do not change
14
Temperature for exiting the Compressor
Discharge Protection
5 ~ 30 °C
20 °C
Do not change
15
Heat Pump Auto Restart Mode (Off = 0; On = 1)
0 / 1
1
Adjustable
16
Starting Temperature for Defrosting Evaporator
-9 ~ 10 °C
4 °C
Recommended not
to be changed
17
Beeper (Off = 0; On = 1)
0 / 1
1
Adjustable
18
Disinfecting Cycle (Off = 0; On = 1)
0 / 1
0
Adjustable
19
Geyser temperature measurement probe offset
-10 ~ 10 °C
3 °C
Do not change
20
Automatic geyser temperature measurement
probe offset
0 (fixed) / 1
(calculated)
0
Do not change
A
Water Temperature
-9 ~ 90 °C
Output value
B
Evaporator Coil Temperature
-9 ~ 90 °C
Output value
C
Compressor Discharge Temperature
0 ~ 127 °C
Output value
D
Ambient Temperature
-9 ~ 90 °C
Output value
E
Heat pump return water temperature
-9 ~ 90 °C
F
Electronic expansion valve operating parameter
0 ~ 50
* A maximum water temperature of 55°C can be achieved by the heat pump without using auxiliary heaters. However, if the
target temperature is set between 55°C and 75°C, the geyser’s electric element will be activated above 55°C to reach this
temperature. NOTE: The recommended default set temperature of the geyser element thermostat is 60°C. The electrical
element will not be able to heat the water inside the geyser to a higher temperature than what the thermostat is set at,
regardless of what the heat pump LCD controller target temperature is (Parameter 0).
Remarks:
Parameter 0 –It is advised to set the target temperature at 55°C.
Parameter 2 –Interval between two defrosting operations. When ambient temperature is lower, set
this to a shorter interval for better performance.
Parameter 3 –The temperature setting at which the heat pump will start the defrosting cycle. When
ambient temperature is lower, set this temperature higher for complete defrost of the heat pump
evaporator.
Parameter 4 –The temperature setting where the defrost cycle is stopped. When ambient
temperature is lower, set this temperature higher for complete defrost of the heat pump evaporator.
Parameter 5 –Defrosting time. When ambient temperature is lower, set this temperature higher for
complete defrost of the heat pump evaporator.
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To access and change these parameters follow the steps below:
1. Press and hold the button for a few seconds while the unit is in standby mode (i.e. not
busy heating the water). Parameter 00 will flicker.
2. To change this value, press the button once.
3. Make use of the or button to change the value accordingly.
4. Press the button to confirm the setting.
5. Make use of the or button to select between the different operating parameters.
6. To change the values of these parameters, repeat steps 2 to 4.
7. Wait for 5 seconds without pushing any buttons to exit this mode automatically.
Note:
If the target temperature needs to be changed, parameter 1 can be modified as explained
above or else the user can simply press the or button.
Target Water
Temperature
Parameter 1: Temperature Difference before
Heat Pump Starts:
2°C = Heat Pump Starts More Frequently
5°C = Heat Pump Starts Less Frequently
Micro Circulation Function
(See Section 3.8)
0 = function off;
1 = function on
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2.8 Micro Circulation Function
Your Enerflow heat pump has the functionality of heating a central, ring-main water distribution
pipeline. This function is used to ensure that hot water is supplied throughout the residence as an
instant hot-water-on-tap solution. The installer will ensure that the commissioning valve on the
return line is set to an approximate 10% bypass. Activate the micro circulation function by
changing Parameter 8 to the value of 1 (as described in the previous section) on the intelligent
controller. With this function enabled, the water pump will run for 40 seconds during the period set
in Parameter 9 (adjustable between 2 and 60 minutes). Thus, if Parameter 9 is set to 10, the heat
pump will start the water circulation pump every 10 minutes for the predefined 40 seconds.
Depending on the volume of water in the ring-main, the Parameter 9 interval should be adjusted
accordingly (more volume = smaller intervals to ensure that the water is kept at the desired
temperature).
Warning: All plumbing installations must comply with local standards and
regulations. Refer to SANS 10254.
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3. Troubleshooting
Note: Please make use of the following table to do troubleshooting if an error or fault occurs. If the
problem persists shut down the system and switch off the main power supply or activate the
crossover switch as described in this manual. Hereafter, contact your installer for assistance.
Fault / Error /
Notification
Possible cause
Recommended
action/Remark
Heat pump does not start
1. Main power supply off
2. Circuit breaker off
3. Heat pump protection imposed ( See
error codes below)
4. Loose electrical connections
5. Unit failure
1. Check power supply.
2. - Test for an electric leak/short-circuit
- Reset the circuit breakers
- Check that all electric components have
been installed correctly.
(Take note: Only qualified electricians
shall do work on electrical
components)
3. Identify the protection type and correct the
fault.
4. Check wiring connections and tighten the
terminal screws.
Fan does not work
1. No power supply
2. Fan motor fault
3. Loose connection
4. Obstruction
1. Check power supply.
2. Check if the fan rotates freely and that no
restrictions are present.
3. Replace if broken.
Heat pump works with
insufficient heating
1. Finned coil is dirty.
2. Obstacle blocks air inlet/outlet.
3. Insufficient refrigerant in heat pump
gas cycle.
1. Clean the finned coil.
2. Remove the obstacle.
3. Add refrigerant (Take note: Technician
must perform this action).
P01
1. Water inlet temperature sensor failure
Contact the installer in the event of any of
these failures.
P02
1. Evaporator coil temperature failure
P03
1. Compressor discharge temperature
sensor failure
P04
1. Ambient temperature sensor failure
P05
1. HP Switch failure
P06
1. LP Switch failure
P07
1. Too high compressor discharge
temperature
See E07
P08 (Notification)
1. First class anti-freeze protection
1. Water pump will run for 2 seconds every
10 minutes.
P09 (Notification)
1. Second class anti-freeze protection
1. Heat pump will start-up.
P11
1. Overload protection
1. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
E05
1. HP Switch protection
1. Electric element will be activated
automatically.
2. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
3. Clean inline water strainer.
4. Ensure adequate water pressure and flow
is available.
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E06
1. LP Switch failure
1. Electric element will be activated
automatically.
2. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
E07
1. Too high compressor discharge
temperature
1. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
2. Clean strainer and open a hot water tap to
flush/prime the water lines.
3. Ensure that the fan is not restricted by dirt
or leafs.
4. Check for adequate main water supply
pressure.
E08
1. Communication failure
1. Reconnect LCD display unit.
2. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
Defrosting Sign Indicating
1. Defrosting failure
1. Defrosting sign will show permanently on
LCD screen.
2. Switch off main power supply to the heat
pump, wait 30 seconds and switch on again.
NOTE: If any of the errors above appear frequently, contact your installer.
Please note the following:
1. Outdoor temperature, water inlet temperature and parameter settings may affect the
performance and power consumption of the heat pump unit.
2. Ensure that the heat pump air duct is not blocked.
3. If the ambient temperature is too high, the fan may stop working temporarily in order to
protect the system. The heat pump will however still provide hot water to the geyser. If the
temperature decreases the fan will resume operation again.
4. If the unit enter the defrosting mode the fan may stop working temporarily. Once the
evaporator coil temperature has reached an acceptable level, the fan will resume
operation.
5. Ensure that the unit is well ventilated and that no cold air is redirected back into the
evaporator (i.e. do not install the heat pump in small enclosed rooms).
6. Ensure that all the isolation valves are open before the heat pump is turned on.
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4. Service and Maintenance
Service and maintenance operations should be carried out by
qualified personnel who are well trained within the refrigeration
field.
Although your Enerflow heat pump is a self-contained and reliable
means of providing eco-friendly hot water, some maintenance needs to
be performed. The following items should be checked:
The airway of the fan and the evaporator needs to be cleaned every six months to ensure
effective airflow and heat transfer. Remove any obstructions such as cobwebs, leaves and the
like. Do not use a high pressure water hose to spray down the unit; the heat exchanger fins
may be damaged.
The strainer should be cleaned on a regular basis, depending on water conditions and
especially two days after initial installation. This is done by removing the bonnet of the strainer
with a correct size spanner and removing the strainer element (sieve). The strainer element
can be flushed under running water before reinserting it and closing the bonnet again.
Ensure that the water supply pressure and flow rate is sufficient at all times.
No maintenance needs to be performed on the internal components of your Enerflow heat
pump.
The unit is designed with a close loop gas cycle that does not need short term maintenance or
service under normal operation.
Ensure that the system is drained completely of water if it is not going to be used in the winter
in order to avoid a pipe from bursting due to freezing.
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5. Performance Specifications
Unit may be improved or technical data may be modified without prior notice. For specific technical
parameters, please check the plate on the side of the unit.
5.1 Model ERHP-SU08
ITEM
UNIT
VALUE
Model range
ERHP-SU08-MS &
ERHP-SU08-SS
Refrigerant
R410a
Mass of Refrigerant
g
550
Compressor Discharge Pressure
Bar
23*
Compressor Suction Pressure
Bar
10*
Power Supply –Voltage
V
220–240/1ph
Power Supply –Frequency
Hz
50
Heating Capacity
kW
3**
Average Rated Running Current
A
2.73***
Average Rated Power Input
kW
0.6***
Coefficient of Performance (COP)
W/W
3.33***
Electric Heater Rated Current
A
9
Electric Heater Rated Power Output
kW
2 ****
Water Temperature Setting Range
°C
30 ~ 55 ~ 75 *****
Maximum Water Temperature
°C
75
Highest Ambient Temperature
°C
45
Lowest Ambient Temperature
°C
-5
Water Tank Size
L
100 –200
Maximum Water Pressure
Bar
7
Inlet and Outlet Water Pipe Diameter
Inch
3/4"
Protection against water class
IPX4
Noise Level
dBA
<55
Net Weight
kg
35-37
Net Dimension
w x d x h
778 x 320 x 504
Packing Dimension
w x d x h
820 x 415 x 510
Note:
* Testing condition: Ambient Temperature: 20°C DB / 15°C WB
Water Inlet Temperature: 30°C
** Testing condition: Ambient Temperature: 30°C DB
*** Testing condition: Ambient Temperature: 20°C DB / 15°C WB
Water Heating Cycle: 15°C to 55°C
**** Heat pump output for backup element.
***** Water temperature can reach 55°C by the heat pump alone. However, if the desired
water temperature needs to go higher (56°C to 75°C) the electric heater will be activated.
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5.2 Model ERHP-SU14
ITEM
UNIT
VALUE
Model range
ERHP-SU14-MS &
ERHP-SU14-SS
Refrigerant
R410a
Mass of Refrigerant
g
700
Compressor Discharge Pressure
Bar
23*
Compressor Suction Pressure
Bar
10*
Power Supply –Voltage
V
220–240/1ph
Power Supply –Frequency
Hz
50
Heating Capacity
kW
5**
Average Rated Running Current
A
5.68***
Average Rated Power Input
kW
1.25***
Coefficient of Performance (COP)
W/W
3.66***
Electric Heater Rated Current
A
9
Electric Heater Rated Power Output
kW
2 ****
Water Temperature Setting Range
°C
30 ~ 55 ~ 75 *****
Maximum Water Temperature
°C
75
Highest Ambient Temperature
°C
45
Lowest Ambient Temperature
°C
-5
Water Tank Size
L
150 –500
Maximum Water Pressure
Bar
7
Inlet and Outlet Water Pipe Diameter
Inch
3/4"
Protection against water class
IPX4
Noise Level
dBA
<58
Net Weight
kg
53-54
Net Dimension
w x d x h
953 x 360 x 555
Packing Dimension
w x d x h
1013 x 380 x 575
Note:
* Testing condition: Ambient Temperature: 20°C DB / 15°C WB
Water Inlet Temperature: 30°C
** Testing condition: Ambient Temperature: 30°C DB
*** Testing condition: Ambient Temperature: 20°C DB / 15°C WB
Water Heating Cycle: 15°C to 55°C
**** Heat pump output for backup element.
***** Water temperature can reach 55°C by the heat pump alone. However, if the desired
water temperature needs to go higher (56°C to 75°C) the electric heater will be activated.
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6. Installation Handover
Once the installation is complete and the system tested, ensure that the client
understands the operation and safety requirements of the heat pump.
All repair and service work that need to be performed to this product must be
done by a qualified person.
Ensure that the details of the certificate below are completed by both the client
and the installer to ensure the warranty on the heat pump unit is valid.
Please complete and store this certificate for warranty purposes.
Please complete the loose installation certificate and hand it over to the
installer.
Residential Heat Pump - Installation Certificate
Heat Pump Serial Number:
Installation Date:
Installer Detail
Company Name: Reference Number:
Tel:
Signature:
Name:
Surname:
Client Details
Address:
Suburb:
City:
Tel:
I (the undersigned) acknowledge that the installation was completed and tested. I confirm that the
installer has shown me the workings and operation of my Enerflow heat pump. I also understand
the operation and safety requirements for this heat pump unit.
Signature:
Name:
Surname:
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