SERO BWA-SS-6 User manual

Please read this operation manual before using the Heat Pump
INSTALLATION AND MAINTENANCE INSTRUCTIONS
GROUND SOURCE HEAT PUMP
BWA-SS-10 BWA-SS-12 BWA-SS-16
( 3x400V / 3 / 50Hz )
( 230V / 50HZ )
MODEL :
BWA-SS-6 BWA-SS-8
( ALL IN ONE )
JULY 2009

Contents
1
System description
Principle of operation ............................................ 3
Control panel
Layout .................................................................. 5
Explanation .......................................................... 5
General information for the installer
Transport and storage ............................................ 7
Installation .............................................................. 7
Guideline values for collectors .............................. 7
Inspection of the installation .................................. 7
Pipe connections
General .................................................................. 8
Pipe connection (collector) .................................... 8
Pipe connection (heating medium) ........................ 9
Pipe connections (water heater) ............................ 9
Pump capacity diagrams, heating medium side .. 10
Pump capacity diagrams, collector side .............. 11
Electrical connections
Wiring of the terminal (mode one)......................... 13
Connecting the room temperature sensor ........... 14
Layout of the PCB ............................................. 15
1.5mm2 terminal connection ............................. 15
Part of wiring diagram ........................................ 16
2.5mm2 terminal connection ............................... 16
Wiring diagram ( 230v / 50 Hz ) ............................ 17
Commissioning and adjusting
Preparations ........................................................ 19
Filling and venting the collector system .............. 19
Filling the heating medium system ...................... 19
Internal air vent valve, brine ................................ 19
Inspection ............................................................. 20
Readjusting, heat medium side ............................ 20
Readjusting, collector side .................................. 20
Emptying the water heater .................................. 20
Main Menu Information ......................................... 22
Sub-menu Operation.............................................. 22
Sub-menu Heat Curve........................................... 23
Sub-menu Temperature ........................................ 24
Sub-menu Operating Time .................................... 27
Adjustments to be made regularly ........................ 28
Heat Generation-General....................................... 28
Adjustment of the CURVE valve ........................... 29
Adjustment of ROOM valve.................................... 31
Adjustment of Part of the Heat Curve .................... 31
Adjustment the MIN and MAX valve ..................... 32
Adjustment of the HEAT STOP valve......................33
Maximum Return Line Temperature ..................... 35
Warm water Production........................................... 35
Regular checks.......................................................36
Check of the Operating Mode............................... 36
Checking the Brine Level in the Brine system ...... 36
Dealing with malfunctions
Draining, heat medium side ................................ 41
Draining, collector side.......................................... 41
Component placement
Component positions 1 ........................................ 42
Component positions 2......................................... 43
Component positions 230 V / 50 HZ .................... 44
Component positions 3 x 400 V / 3 / 50 HZ ......... 44
List of components
List of components................................................ 45
Dimensions
Dimensions and setting-out coordinates .............. 46
Accessories
Accessories .......................................................... 47
Technical specifications
Technical specifications 230 V ............................ 48
Technical specifications 3 x 400 V ...................... 49
Unit Description .................................................... 3
Principle of heatpump ........................................... 4
Functions ............................................................. 6
Symbols ............................................................... 6
How to adjust the rate of flow .............................. 10
Connect the power cord ....................................... 12
Wiring of the terminal (mode two)......................... 13
Connecting the outside temperature sensor ........ 14
Wiring diagram ( 3X400v / 3 / 50 Hz ) ................... 18
Graph of recent change in TEMPERATURE............34
Checking the Water Level of the Heating system .37
Checking the safety valves.................................... 37
In the event of leakage.......................................... 37
Alarm Messages.................................................... 38
Terminology and Abbreviations............................. 39
Draining, water tank.............................................. 41
Draining, the chassis............................................. 41
Enclosed kit .......................................................... 47
Adjust the brine and the heating medium pump ... 20
Sub-menu Integral ................................................. 24
Sub-menu Reset ................................................... 28
Sub-menu Man Test .............................................. 28
Control
General Information .............................................. 21
Menus ................................................................... 22
Description of the switch board............................. 40
Degree Minute's(DM) instruction .......................... 25

BWA-SS series consists of a heat pump, water heater,
electrical module, circulation pumps and a control sys-
tem. BWA-SS series is connected to the collector and
heating medium circuits.
The heat from the heat source (rock,
soil, lake) is taken
up via a closed collector system in which a mixture of
water and antifreeze circulates. Groundwater can also
be used as a heat source, but this requires an inter-
vening heat exchanger.
The brine emits its heat to the refrigerant in the heat
pump’s evaporator. It then vaporises and is com-
pressed in the compressor. The refrigerant, the tem-
perature of which has now been raised, is passed to
the condenser where it gives off its energy to the heat-
ing medium circuit and, if necessary, to the water
heater. After the condenser there is a built-in electrical
module which cuts in if there is a high demand.
System description 2
Principle of operation
The heating medium side and
the hot water side must be fit-
ted with the necessary safety
equipment in accordance with
the applicable regulations.
Cooling medium in
Cooling medium out
Cooling medium
pump
Evaporator
Condenser
Compressor
Expansion
valve
Heating medium pump
Heating medium return
Heating medium flow
Three-way valve
CW
HW
Expansion
vessel
Electrical
auxiliary heater
Heating
flow
Heating
return
(KB)
(VB),
(VB),
(KB)

System description
3
Unit Description
In order to get the best results from the climate system BWA-SS series you should read through the
section For the System manager in these Installation and Maintenance instructions.
BWA-SS series is a climate system for heating houses and apartment buildings as well as industrial
properties.
Ground, rock or lakes can be used as the heat exchange source.
BWA-SS series
is a complete heating installation for heating and hot water .
It is fitted with new design on the market to be developed specifically for heat pumps. A new evaporator enables
a
new and impr oved cir culation system for the r efrigerant. The heat pump has an integrated 150 or 200 litr e water
tank and
an immer sion heater . The T ap W ater Stratification system impr oves the ef ficiency of heat transfer by keeping
the water in
distinct thermal layers in the water tank.
The unit is fitted with a r egulating computer , which is contr olled over a graphic display unit.
Heat is distributed thr oughout the house over a hydr onic heating system r eferr ed to as low temperatur e
system with a maximal water temperatur e to radiators (supply line temperatur e) of 65°C. Most of the heating
demand is taken car e of by the heat pump (compressor unit), the auxiliary heater being star ted only when
demands exceed available heat pump capacity .
BWA-SS series consists of five main components:
a. Heat Pump Unit
Rotary or Scr oll-compr essor
Stainless steel heat exchangers
Cir culation pumps for Brine system (brine) and heating systems
V alves and safety equipment for r efrigerant system, complete with necessary electric components
b. W ater Heater
150 or 200 litr e
Lined
with copper sheet against corr osion or made of stainless steel
Maintenance fr ee as no anode is used
c. Reversing V alve
Opening or closing the connection to water heater accor ding to operating mode: heating or warm water
pr oduction
d. Auxiliary Heater
3 / 6 / 9 kW electric heating element
Three-step capacity contr ol
Fitted on supply line
Delivers back-up heat in case of gr eat heat demand that exceeds heat pump capacity
Star ts automatically , pr ovided operating mode “AUTO” has been selected
e. Regulating Equipment
The r egulating system contr ols heat pump components (compressor , cir culation pumps, auxiliary heater and
r eversing valve). Based on data r eceived fr om sensors, it star ts or stops heat pump operation and determines
whether he a ting or warm water shall be pr oduced. The system consists of:
Control computer with graphic display unit
T emperatur e sensors (outside air ,room, supply line, r eturn line, and Brine system)

System description 4
Principle of heat pump
A heat pump can exploit the ener gy contained in natural heat sour ces. Or , to put it dif fer ently , the heat
pump ”collects” heat ener gy fr om the heat sour ce. This makes the heat pump a very environmentally friendly and
economically sound alternative for space heating.
a. A hose filled with liquid (Brine system) is immersed into a lake, dug into the gr ound or sunk into the r ock. The
Brine sytem absorbs the heat ener gy of the heat source so that the temperatur e of the water cir culating in
the hose is raised a few degr ees.
b The Brine system is cir culated to the heat pump’ s evaporator . Here the heat ener gy of the Brine system causes
the
r efrigerant, cir culating thr ough the evapo rator , to boil and turn into a gas – it evaporates.
c The r efrigerant, having absorbed heat ener gy , is cir culated to the compr essor wher e pr essur e and temperatur e
ar e raised.
d The r efrigerant continues to the condenser . When condensing, it r eleases heat ener gy to the heat carrier ,
cir
culating thr ough the condenser . The temperatur e of the r efrigerant sinks, and it r eturns to its liquid state.
e The heat ener gy r eleased is carried by the heating cir cuit to water heater and radiator or floor heating systems.
f
At last the r efrigerant is led thr ough the expansion valve, wher e its pr essur e is r educed, and then con tinues to
the
evaporator
.
The pr ocess is r estar ted.
The heat pump has three separate liquid circuits
Brine system circuit
– a water-based mixtur e (brine) transporting ener gy fr om heat source to heat pump.
Refrigerant circui t
– cir culating inside the heat pump. Thr ough evaporation, compr ession and condensation it
absorbs ener gy fr om the Brine system and r ele ases it to the heat carrier . The r efrigerant is chlorine-fr ee.
Heating circuit – water transporting heat ener gy to the heating system (radia tors/floor coils) and the water
heater .
Brine system circuit
Brine system
Brine system circuit
Brine system

Control panel
5
Display
Left
button
Layout
C
D
button
Explanation
Power On/Off
A
Up
button
F
Down
button
Contr ol Panel
The contr ol panel of BWA-SS featur es a graphic display contr ol buttons .
Beside the contr ol panel you will find the User’ s Manual, a shor t description of how to incr ease and r educe r oom
temperature, and a label with name and phone number of dealer .
Graphic display
five
ROOM 20
o
C
Right
OPER. AUTO
ROOM 20
o
C
OPER. AUTO

Control panel 6
Functions
The control computer is operated with the help of a user friendly menu system that is displayed on the control
panel. There is a main menu and four sub-menus accessible from the main menu. The menus are described in detail
further down.
To be able to select the desired menu and increase or reduce preset values, you will use the five buttons.
•One button pointing upwards marked with a plus
•One button pointing downwards marked with a minus
•One button pointing to the right
•One button pointing to the left
• One button pointing to the Power ON/OFF
Symbols
Foryouto know at a glance the actual operating modeof the heatpump,
one of the followingsymbols will be shownin the lower part of the display
dependingon whichpart of the unit is working:
The heat pump is running.
The auxiliary heater is activated.
The figur e next to the symbol indicates
capacity step.
There is a room heating demand.
W arm water is being pr oduced.
Indicates the status of warm water
pr oduction.
If the symbol is empty ,
warm water temperatur e
If the symbol is full, warm water
temperatur
is under
the setting temperature.
e reached to the setting
temperature

General information for the installer
7
Current regulations require the heating installation to
be inspected before it is commissioned. The inspec-
tion must be carried out by a suitably qualified person
and should be documented. The above applies to
closed heating systems. If the heat pump is replaced,
the installation must be inspected again.
BWA-SS series is placed on a firm base, preferably a
concrete floor or foundation. Install BWA-SS series
with its back to an outside wall, ideally in a room where
noise does not matter. If this is not possible, avoid
placing it against a wall behind a bedroom or other
room where noise may be a problem. Any wall that
backs on to a bedroom should be fitted with sound
insulation. Route pipes so they are not fixed to an inter-
nal wall that backs on to a bedroom or living room.
Installation
Guideline values for collectors
Inspection of the installation
For use with 40 x 2.4 PN 6.3 PEM hose.
The length of the collector hose varies depending
on the rock /soil conditions and on the heating sys-
tem, i.e. radiators or floor heating.
Max length per collector should not exceed 400 m.
Where there is more than one collector, they must be
connected in parallel, with a means of adjusting the flow.
For surface soil heat, the hose should be buried at a
depth of about 1 metre and the distance between the
hoses should be at least 1 metres.
For several bore holes, the distance between the
holes must be at least 15m.
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater 51°C
+2
0
-2
1 R 0
HMflow
49(50)°C
Hotwater
51°C
10 400 – 2x300 m 140 – 170 m
6 250 – 400 m 90 – 110 m
Type Surface soil heat, Rock heat, recom-
recommended mended active
collector length drilling depth
8 325 – 2x250 m 120 – 140 m
12 2x250 – 2x350 m 160 – 190 m
The BWA-SS series must be transported and stored
upright and dry. The BWA-SS series may however be
carefully laid on its back when being moved into
a building.
Transport and storage
16 2x250 – 2x350 m 180 – 210 m

Pipe connections
8
Factors to be taken into account when designing the
collector layout are geographical position, type of
rock/soil and cover factor of the heat pump.
When installing the collector hose ensure it rises con-
stantly towards the heat pump to avoid air pockets. If
this is not possible, install high points to vent the air.
All collector pipes in heated rooms must be insulated
against condensation. The level vessel (NK) must be
installed as the highest point in the collector system
and on the incoming pipe before the brine pump. Note
that condensation may drip from the level vessel.
Position the vessel so that this does not harm other
equipment.
As the temperature of the collector system can fall
below 0 °C it must be protected against freezing down
to -15 °C. One litre of ready mixed brine per meter of
collector hose (applies when using PEM-hose 40 x
2.4 PN 6.3) is used as a guide value when making the
volume calculation.
Details of the antifreeze used must be shown on the
level vessel.
Pipe installation must be carried out in accordance
with current norms and directives. The heat pump can
operate up to a return temperature of about 58* °C
and an outgoing temperature of about 70* °C from the
heat pump. The compressor produces up to 65* °C,
the rest is obtained using additional heating.
The other heat pumps has a max return temperature
of approximately 50 °C and an outgoing max tempera-
ture from the heat pump of approximately 60 °C.
Since the BWA,BWB series is not fitted with shut-off
valves, these must be fitted outside of the heat pump
to make future servicing easier.
During assembly the pipes for the heat medium
and water heater and possibly hot water circulation
are routed backwards. The distance between
BWA-SS series and the wall ought to be 50 mm.
General
NOTE!
The pipe system needs to be flushed
out before the heat pump is connected
so that debris cannot damage
component parts.
Shut-off valves should be installed as close to the heat
pump as possible. Fit the supplied particle filter on the
incoming pipe.
In the case of connection to an open groundwater sys-
tem, an intermediate frost-protected circuit must be
provided, because of the risk of dirt and freezing in the
evaporator. This requires an additional heat exchang-
er.
Pipe connections (collector)
The collector circuit may be connected from the left or
from the right. The lower side panels are swapped
over to suit the chosen connection option. The
enclosed connecting pipes for the brine are secured
using the clips in the punched tabs that are folded
down on the side in question.

Pipe connections
9
Pipe connections for the heat medium side are made
at the top. All required safety devices, shut-off valves
(as close to the heat pump as possible), and particle
filter (supplied) are fitted.
When connecting to a system with thermostats on all
radiators, a relief valve must be fitted, or some of the
thermostats must be removed to ensure sufficient
flow.
Pipe connections (heating
medium) The heat pump´s water heater must be fitted with the
necessary valve equipment.
Pipe connections (water heater)
The heat pump should be supplemented with an elec-
tric water heater if a bubble pool or other significant
consumer of hot water is installed. The valve coupling
in COMPACT (electrical water heater) can be divided.
The mixing valve stays in COMPACT and the remain-
ing valve coupling can be used for incoming cold
water in BWA-SS series.
SF
BK/JK
Brine in
Brine out
AV
SAV
NK
NK Level vessel
SF Particle filter
P
EXP
SF
BK/JK
Brine in
Brine out
AV
SAV
NK
NK Level vessel
SF Particle filter
HW CW SAV
SAV
VENTING VALVE
NOTE!
The venting valve should be set on
the top of the heating medium system.

Pipe connections
10
Pump capacity diagrams, heating medium side
kPa
BWA-SS-8
BWA-SS-6
BWA-SS-10
Available
pressure
Flow
BWA-SS-12
l/s
1
2
3
0.22 0.44
0.66
0.88 1.10 1.32
80
70
60
50
40
30
20
10
0
1.54 1.76
0
The pump is
adjustable to adjust
the flow: 1, 2, or 3.
BWA-SS-16
kPa
Tillgängligt tryck
Available
pressure
Flow
1
2
3
0.28 0.56
0.84
1.12 1.41.68
80
70
60
50
40
30
20
10
0
1.96 2.24
0
l/s
The pump is
adjustable to adjust
the flow: 1, 2, or 3.
WILO RS-25/8
WILO RL-25/7.5
WILO RS-25/8
WILO RL-25/7.5
How to adjust the rate of flow

Pipe connections
11
Pump capacity diagrams, collector side
kPa
BWA-SS-16
BWA-SS-8
BWA-SS-6
BWA-SS-10
Available
pressure
Flow
BWA-SS-12
l/s
1
2
3
0.22 0.44
0.66
0.88 1.10 1.32
80
70
60
50
40
30
20
10
0
1.54 1.76
0
The pump is
adjustable to adjust
the flow: 1, 2, or 3.
WILO RS-25/8
WILO RS-25/8

Electrical connection 12
NOTE!
Electrical installation and service must
be carried out under the supervision of
a qualified electrician in accordance
with the stipulations in force.
Connect the power cord
( 230V / 50 HZ )
( 3X400V / 3 / 50 HZ )
R
S
L
N
N
G
G
N
T

Electrical connection13
Step1 Step3Step2
Step1 Step3Step2
Wiring of the terminal (mode one)
Wiring of the terminal (mode two)

Electrical connection 14
Connecting The Room Temperature Sensor
Connecting The Outside Temperature Sensor
Outside air temperature sensor
Room temperature sensor
RT
OCT
RT
OCT
Room temperature sensor
Outside air temperature sensor
RT=Room temperature sensor
OCT=Outside air temperature sensor

Electrical connection15
WOT WIT GWOT OCT RT WTT GWIT COMP HP LP CSP
GND
EHI
N
3WV
GWCP
N
GND
GND WCP
N
GWCP2
N
GND
GND WCP2
N
Layout of the PCB
From PCB / CON4 /11,12 From PCB / CON4 /9,10 From PCB / CON4 /7,8 From PCB / CON4 /5,6 From PCB / CON4 /3,4 From PCB / CON4 /1,2 From PCB / CON5 /1,2 From PCB / CON5 /3,4 From PCB / CON5 /5,6 From PCB / CON5 /7,8 From PCB / CON5 /9,10 From PCB / CON5 /11,12 3-Way Valve's Relay ( port 3) From Fuse 2 From Fuse 3 From Fuse 2 From Fuse 3
From Water Return Temperature Sensor
From Water Feed Temperature Sensor
From Groundwater Inlet Temperature Sensor
From Outside Air Temperature Sensor
From Room Temperature Sensor
From Water Tank Temperature Sensor
From Compressor Gas Outlet
Temperature Sensor
From Groundwater Outlet
Temperature Sensor
From High Pressure Pressostat
From Low Pressure Pressostat
From
From From From From
From Adjustable pressure switch
From Electrical auxiliary heater
Temperature Sensor
From Three-way valve forwaterflow
From Ground water cycle pump
From Water cycle pump
From Ground water cycle pump2
From Water cycle pump2
From Neutral line
common terminal
From Neutral line
common terminal
From Neutral line
common terminal
From Neutral line
common terminal
From Neutral line
common terminal
1.5mm2 terminal connection
3-Way Valve's Relay ( port 2)
L C DL C D
NO
COM
NO
COM
COM
NO
OUT3 OUT2 OUT1
OUT4
RS N
OUT5
T
OUT6OUT7
CON3
CON5
Outdoor Condition Temp
Room Temp
Water tank Temp
CON1
P C B
CON2
TRANSFORMER
Ground Water Inlet Temp
Electric Heater interruptor/ Water Flow Switch
High Pressure
Low Pressure
Compressor interruptor
Ground Water Outlet Temp
Compressor stoped protection
CON4
Compressor Gas Outlet Temp
12345678910111213141516
Water Feed Temp
Water Return Temp
1 2 3 45678910 11 12
CON10
Electrical Expansion valve

Electrical connection 16
Part of wiring diagram
2.5mm2 terminal connection
EH1
EH2
N
EH3
N
W
U
V
GND
From AC contactor / L3
From AC contactor / L2
From AC contactor / L1
FromFrom Compressor
From Compressor / V
From Compressor / U
From Compressor / W
From Electrical heater 3
From Electrical heater 2
From Electrical heater 1 From Fuse 4
From Fuse 5
From Fuse 6
From 6mm2 terminal / N
From Neutral line
common terminal
T3
T2T1
L3
L2L1
C1
u
w
v
cm
RED
WHITE
BLACK

Electrical connection17
Wiring Diagram( 230V / 50 HZ )
EHI

Electrical connection
FIGHTER 1220
18
Wiring Diagram ( 3X400V / 3 / 50 HZ )