REVELL LWRc-8kW Quick start guide

1
AN AIR–WATER HEAT PUMP
FOR HEATING AND COOLING WITH A BUILT-IN
ELECTRIC BOILER
Model: LWRc-8kW
Operational Manual (7.4.2014)
•Read this manual carefully; failure to do so could cause irreversible damage to
your device
•The REVEL Company will not be liable for any damage caused by the
installation or the assembly of the heat pump in a manner that is
in contradiction with this Operational Manual
•The effective ambient air temperature must be between -20 °C and + 43 °C
•The temperature of the water entering the heat pump must not exceed 60 °C
On very cold days the built-in electric boiler or another heat source may be connected
(see the bivalence points on the chart below)
Illustration of the heat pump function
Electric boiler
Compressor
Heat transferred
to water
Expansion valve
Heat exchanger
Hot outlet
water
Return
water
Absorbing heat
from air

2
Important Information
1. In the case of using water or simply an additive mixture, it is necessary to
ensure the continuous operation of the circulator that causes the water to flow
through the LWRc-8kW. It is recommended to use a 5% industrial ethanol as an
additive mixture based on its extending of the freeze function and the radical
reduction in the tear strength of the ice.
2. When operating at low temperatures, the unit automatically provides defrosting,
which is accompanied by the drainage of the defrosted air-humidity condensate
in a volume of 0–1 litres per hour.
3. The device comes equipped with a heating cable that is in operation during
defrosting. It is functional to lead the heating cable loop into a sewer or a
drainage outlet, for example.
4. In the event of the accidental occurrence of poor drainage of the condensate and
the subsequent freezing of the heat pump, it is necessary to defrost the device by
means of a brief external intervention, e.g. using a tent and a heat gun.
It is necessary to protect the heat pump at the inlet of heating water by a
regularly cleaned filter
5. It is possible to purchase an installation kit (USP) for the heat pump that
implements both a protective and an operational function. When installing it
into an existing heating system with the possibility of the temperature reaching
more than 60 °C, its use represents a condition for granting a warranty for the
heat pump.
The Technical and Performance Parameters of the HP
Units
LWRc-8kW
Nominal heating/cooling capacity
kW
8.2/6.2
Power supply for the compressor and the electric boiler
V
2x 230V
Input power
kW
1.9 to 2.1
Operating current /max. current at start-up
A
9.5/63
Compressor
type
Highly-Hitachi-rotary
Coolant medium
R410a
Coolant amount
kg
2.8
Water input and output
G
1" ex
Ventilator noise
dB
51/46/3m
Ventilator power input
W
120
Electric boiler power input
kW
3
Effective working temperature
°C
-20 to +43
Max. output temperature
°C
61
Dimensions (length/width/height)
mm
1030/370/750
Weight
kg
107
Output at A+7/W+35 °C
kW
8.2
COP 7/35
-
4.08
Output at A+2/W+35 °C
kW
6.7
COP 2/35
-
3.41
Output at A-7 °C/W+35 °C
kW
5.15
COP -7/35
-
2.63

3
Heat loss of the house (kW)

The Heat Pump Control
The HP of the LWRc-8kW type comprises a digital controller with a LED panel,
which is located inside the building. It is not possible to commission the device
without the controller and –as an anti-theft measure –a replacement controller is
supplied only against a damaged one.
The controller is used for setting the functions and the parameters of the heat pump.
The controller also displays error messages - see the table below. The device is
factory-set and the user should carefully consider changing the parameters. The device
can be controlled by using one of two options.
A) The standard (and recommended) control method is in accordance with the
temperature of the water entering the LWRc. Set on the controller in this case are the
required upper limit (Parameter 1) and the critical lower limit for switching on the
electrical source (Parameter 6). Hysteresis for re-switching the device after reaching
the upper limit is adjustable between 2 and 15 °C. By default the hysteresis for
switching off the electric boiler is set at 2 °C.
B) The second option is to control the device via a room thermostat, for which a
certain hysteresis is anticipated (see the wiring diagram). The thermostat, however, is
not the object of the supply. The device is protected from cycling by a 4-minute
interval. For this type of control, however, it is practicable to increase the required
value of the return water (Parameter 1).
The device displays the output temperature (Parameter C), which, in accordance with
the flow rate, may be cca. 3–10 °C higher than the input temperature (or, in the
cooling mode, lower). We recommend operating the device with a flow rate of
2,000 l/h, at which level it has the highest level of efficiency that corresponds to a
delta of cca. 3 °C. The device is equipped with a flow sensor and any flow
insufficiency may manifest as an error message. The device is fitted with frost
protection, which automatically starts-up the circulation pump when the exterior
temperature drops to below +3 °C.
The device is provided with the option of reducing the fan speed at night (Parameter
13).
C) Control of the device in the cooling mode enables its operation in floors or in fan
coils, the air-conditioning of the heat exchanger, for technological cooling, etc., in
accordance with Parameter 0. Every 20 minutes, in floor mode, it monitors the outlet
water temperature, and if this drops to below 15 °C, the device shuts down and
displays PP10 error message. This measure is necessary for protecting the floor from
the condensation of moisture e.g. when the water filter becomes clogged.

vh
1
CYKY - J 5x2.5
2
CYSY 3G1
3
CYKY- J 3x1.5
4
CYKY- O 2x1.5
5
CYSY 3G1
6
CYSY 3G0.5
Heating cable
Built-in electric boiler 3 kW
4-way valve
Electronic expansion valve
Temperature of the inlet gas
Temperature of the return gas
Temperature of the outlet water
Temperature of the inlet water
Temperature of the cooling piping
Temperature of the ambient air
Flow switch
Low pressure protection
High pressure protection
Compressor thermal fuse
Controller 6
Room
thermostat
Circular
pump
Auxiliary
boiler
230 V
0.5 A
Power supply
for the compressor
Power supply
for the electric
boiler

6
Diagram of the control panel
1- The control display
A. When the device is OFF, the display shows the time
B. When the device is ON, the display shows the temperature of the water in the buffer tank
2- Setting mode
a) Switching between the HEATING / COOLING modes
-To switch between the HEATING / COOLING modes when the device is ON, press
the key
-The change of mode is indicated by the LED indicator light
b) An overview of the setting of the operational parameters
-Pressing the key for 5 seconds will bring you to Menu, where it is possible to
control the settings of the parameters, by using the and keys; the
parameter number and the value of the specific parameter will be flashing.
-To change the value of the parameter press the key briefly and the value of the
parameter will start flashing. You can implement any required change by using the
and keys.
After 10 seconds the change will be automatically saved.
MODE
Water temperature
and time setting
Heating
Cooling
Timer OFF/ Entry into a MENU (5 sec)

7
To change Parameter 15, simultaneously press the and keys for a period
of 5 seconds. Only then, by using the arrows, can any change be implemented.
c) Simplified temperature setting adjustment in the heating mode (also applicable in the cooling
mode for Parameter 0)
-The set value (Parameter 1) is displayed by single pressing of the or the
key; by subsequent pressing it is possible to change this value as required.
3- Time setting
a) Available whether the device is ON or OFF.
b) Press the key to set the time. When the clock on the display is flashing, press the
key again to set the hour. To change the values press the and the keys.
Before the flashing stops, press the key to set the minutes. To change the values
press the and keys again. When setting is completed, press the key and
the water temperature will be displayed. After 30 seconds, the control display will return
to its normal mode.
4- The ON/OFF Timer
a) Press the key to turn the timer ON. When the indicator light is lit and the time is
flashing, press the key again to set the hour. To change the values press the
and the keys. Before the flashing stops, press the key to set the minutes. To
change the values press the and the keys. When setting is completed, press
the key and the water temperature will be displayed. After 30 seconds, the control
display will return to its normal mode.
b) To turn the timer OFF press the key . When the indicator light is lit and the time is
flashing, press the key again to set the hour. To change the values press the
and the keys. Before the flashing stops, press the key to set the minutes. To
change the values press the and the keys. When the setting is completed,
press the key and the water temperature will be displayed. After 30 seconds the
control display will return to its normal mode.
5- Cancelling the ON/OFF Timer
a) Press the or the key to cancel the ON/OFF timer.
If numbers are flashing, press the key. If the timer indicator light is not lit and the
LED is displaying the water temperature, the ON/OFF timer has been cancelled. After
30 seconds, the control display will return to its normal mode.
6- Locking and unlocking the keyboard is done by pressing the +
keys for a period of 5 seconds

8
Parameters
Meaning
Range
Default
Note
0
Temperature setting for cooling
8 °C～25 °C
20 °C
Adjustable
1
Temperature setting for heating
30 °C～50 °C
35 ℃°C
Adjustable
2
Defrosting cycle
30Min～90Min
57Min
Adjustable
3
Temperature point for switching ON
the defrosting
-30 °C～0 °C
-7 °C
Adjustable
4
Temperature points for switching OFF
the defrosting
2 °C～30 °C
30 °C
Adjustable
5
Time of switching OFF the defrosting
1～12Min
3Min
Adjustable
6
Temperature set for turning ON the
electric boiler
2 °C - 50 °C
25 °C
Adjustable
7
Defrosting using the electric boiler
0/1
0
1- Integrated
with an electric
boiler
0- Without
8
Mode
3
3
--
9
Mode of the circular water pump
0/1
0
0-runs
continuously
1-turns off
when the
desired
temperature
has been
reached
10
Overheating temperature
-15 °C～15 °C
3 °C
Adjustable
11
Overcooling temperature
-15 °C～15 °C
5 °C
Adjustable
12
Setting the hysteresis
2 °C～15 °C
2 °C
Adjustable
13
Setting the night mode
0/1
0
1: ON
0: OFF
14
Cooling method
0/1
0
1: for fan-coils
0: for floors
15
Temperature of the outlet water
-8 °C～25 °C
15 °C
Can be set
specifically;
see Page 7
A
Turning off the device in the event of
freezing
-30 °C～0 °C
-30 °C
Adjustable
B
Input water temperature
-9 °C～99 °C
/
Measured
value
C
Output water temperature
-9 °C～99 °C
/
Measured
value
D
Temperature of the coil pipe (heating)
-30°C～80°C
/
Measured
value
E
Temperature of the return gas
-30°C～80°C
/
Measured
value
F
Ambient temperature
-30°C～80°C
/
Measured
value
G
Temperature of the coil pipe (cooling)
-9 °C～99 °C
/
Measured
value
H
Automatic expansion valve
0～50
/
Measured
value

9
Error Codes
Error code
Failure description
PP1
Inlet water sensor failure
PP2
Outlet water sensor failure
PP3
Coil pipe sensor failure
PP4
Return gas temperature sensor failure
PP5
Air temperature sensor failure
PP6
Coil pipe sensor failure (heating)
PP7
Anti-freeze protection
PP8
Coil pipe sensor failure (cooling)
PP9
Water temperature sensor failure
PP10
Low temperature for floor cooling
EE1
High pressure protection
EE2
Low pressure protection
EE3
Insufficient water flow
EE6
Excessive temperature of external air
EE8
Communication failure
Heating indicator light flashing for a long period
Defrosting
Minimum distance
from any obstruction –0.3 m
Minimum distance
from any obstruction –0.3 m
WATER
INLET
Water inlet
Water outlet

10
Installation Instructions
•The device must only be installed by authorised personnel.
•The unit is designed for a power supply of 400 or 230V/50Hz.
•Recommended protection for use with the electric boiler is 3F-16A/D, and
without the electric boiler 1F-16A/D.
The device should be installed externally, preferably vertically to the wall of the
building, in a position that ensures smooth air circulation. It is suitable to install the
device close to a drainage canal, 20 cm above the terrain. The unit should be mounted
to the bearing construction using screws and anti-vibration rubber mounts. Select the
area of its placement in such a manner that neither airborne nor construction noise can
travel into premises designated for resting in the owned or the neighbouring property.
Commissioning of the Heat Pump
•Check that the HP is properly shielded and no foreign objects are present on its
surface.
•Check that the unit is properly filled and is deaerated.
•Check that the water flow through the HP is supplied.
•Check the system’s connection to the electricity supply and its grounding.
•Turn on the heating pump. After several minutes the system should automatically
start operating.
•Check that the pump is rotating smoothly without making any unusual noises and
that the unit does not shut down at short intervals (in less than 15 minutes).
•Check that the HP is supplying thermal energy and notice whether there is any
increase in the temperature of the input or the output water.
•During periods of low outdoor temperatures undertake periodical check-ups of the
unit and in case of freezing, reset the time parameters for defrosting (this also
depends on the presence of any water surface in the area surrounding the system).
Maintenance
The LWRc-8kW heat pump is fully automatic.
•The input water filter must be cleaned periodically.
•Periodically clean any solid impurities and dust from the air section of the heating
pump.
•If there is anything amiss with the unit and if the customer is unable to solve the
problem, contact the supplier or our company for the remedying of the problem.
•The system must be operated with water that meets the requirements for heating
water (max. 7 degrees of hardness and a pH ranging between 7.8-8.5).