wattwatchers FBC-HC User guide

MuB_xx_FBC-HC_EN_2011-08-16 Subject to technical modifications! page 1
EN
INSTALLATION AND OPERATING INSTRUCTIONS
Heating/Cooling control unit FBC-HC
IMPORTANT!
It is strongly recommended that both the installer and end user should care-
fully read and understand the installation and operation manual, prior to
commencing installation.
The control units FBC-HC must only be mounted operated and maintained
by a qualified fitter; failure to comply with this condition could render the
manufacturers warranty obsolete.
The manufacturer shall not be responsible for any incompetent use of the
FBC-HC and appropriate observance of all instructions in the above manual
is considered mandatory. “For reasons of safety” modifications to the unit
are not permitted and repairs if necessary must only be carried out with approval by the manufacturer.
The temperature range and the contents of the set depend on the model and equipment.
Subject to technical modification.
1. INTENDED USE 1
2. REFERENCES, SYMBOLS AND ABBREVIATIONS 2
3. SAFETY INSTRUCTIONS 2
4. DESIGN 2
5. INSTALLATION AND ELECTRICAL CONNECTION 2
5.1. MOUNTING AND HYDRAULIC CONNECTIONS 2
5.2. ELECTRICAL CONNECTION 3
6. TECHNICAL DATA 3
7. MATERIALS 4
8. TROUBLE SHOOTING 4
1. INTENDED USE
The hydraulic control unit FBC-HC is used for variable flow temperature control of the supply temperature in floor
and panel heating/cooling systems. The required flow temperature is controlled in conjunction with the outside
temperature according to a selectable curve. The inclination of this heating/cooling curve can be selected due to
the local climatic conditions.
With the heating-cooling controller CC-HC the system can either be operated solely in heating mode, cooling
mode or in combined mode of heating and cooling. The heating / cooling commutation can be done manually or
via an external switching signal (e.g. from a reversible heat pump, etc.).
With the controller CC-HC the operation of water surface heating / cooling system can be adjusted to the individ-
ual needs of the installation. Particularly suitable for the regulation of single-family homes or different units in
apartment buildings with individual user behaviour. The controller has a 7-day programming with 9 factory-set in-
tegrated standard programs as well as 4 programs which can be set as required by the user.
A room temperature controller can optionally be connected to the CC-HC climate controller. Suitable cable based
or radio-controlled programmable room thermostats are available as accessories. These enable heating/cooling
system operation to be optimised based on the usage pattern of a reference room.
The FBC-HC have been designed for use in dry environments, e.g. in residential rooms, office spaces and indus-
trial facilities. Usually it is installed in the central heating room.
Verify that the installation complies with existing regulations before operation to ensure proper use of the installa-
tion.
If the control unit FBC-HC is used in systems with cooling function, then it might be associated with a suitable
and properly affixed insulation to prevent condensation on the control unit or pipes.
The included heat insulation box may be used only for heating purposes. Local regulations regarding heat / cold
insulation must be considered and also to be observed.
Fig.1

MuB_xx_FBC-HC_EN_2011-08-16 Subject to technical modifications! page 2
EN
2. REFERENCES, SYMBOLS AND ABBREVIATIONS
For better understanding in this document references are used in the form of symbols and abbreviations, which are
described below.

Reference to further
documents
FBH
Floor heating
RT
Room thermostat
FH/K
Radiant heating / cooling
TB
Temperature limiter
Important information and
application hints
KE
Chiller
UWP
Circulation pump
MuB
Installation and operating
instruction
WDS
Heat insulation box
Safety information or im-
portant information about
functions
WE
Boiler / heat generator
3. SAFETY INSTRUCTIONS
WARNING: Always disconnect the power supply prior to performing any installation or connec-
tion operations!
All installation and wiring work at the unit must be carried out only in a safe (idle) condition.
The appliance may be connected and operated by qualified personnel only. Make sure to adhere to
valid local safety regulations.
The control units are neither splash- nor drip-proof. Therefore, they must be mounted in a dry place.
Do not interchange the connections of the sensors and the 230V connections under any circumstances! Inter-
changing these connections may result in life endangering electrical hazards or the destruction of the appliance
and the connected sensors and other appliances.
4. DESIGN
1: Ball valve (supply)
- with gravity flow stop
- supply sensor connection
- red ball valve handle, L=92
- thermometer 0 – 120 °C
2: circulation pump
3: valve drive
4: 3-way mixing valve
5: CC-HC
6: return pipe
7: Ball valve (return)
- supply sensor connection
- blue ball valve handle, L=92
- thermometer 0 – 120 °C
8: brackets with screws and dowels
9: heat insulation box (two-parts)
5. INSTALLATION AND ELECTRICAL CONNECTION
5.1. MOUNTING AND HYDRAULIC CONNECTIONS
The FBC-HC can be installed directly on a dry, sufficiently firm background
(wall). Remove the front part of the heat insulation box (Fig.2_10). Using
screws and dowels fit the back-part of the WDS (Fig.2_9) together with the
brackets to the wall.
Please pay attention not to damage or brake the cables of the control, pump,
valve drive or temperature limiter while assembling. The cables must be in-
stalled without tension. The cables will be fixed by means of the device for
strain relief at the heating controller.
The hydraulic connections are to be made as shown in Fig.3.
1
2
3
4
5
6
7
8
9a
Fig.2
9b
Fi.3
VL
RETURN
SUPPLY

MuB_xx_FBC-HC_EN_2011-08-16 Subject to technical modifications! page 3
EN
5.2. ELECTRICAL CONNECTION
All electrical connections must be performed by an authorised specialist in accordance with the local regulations
governing electrical installation work. The electrical cables must not come into contact with any hot components.
Usually cables for power supply, circulation pump, valve drive and flow temperature sensors are wired ex-works.
Just the outside temperature sensor as well as an optional temperature limiter and room thermostat has to be con-
nected on site (fig. 4).
Remove the cable jumper if an additional wired room thermostat is connected (fig. 4).

If the heating controller possesses RF thermostat interface please refer to the MuB both of the RF thermostat
and heating control.
Further information about electrical connections exists in the MuB of the heating control.
6. TECHNICAL DATA
Fittings and circulation pump
Max. ambient temperature:
0…+50 °C 1)
Max. fluid operating temperature:
0…+90 °C 1)
Max. operating pressure:
6 bar
Power supply:
230 VAC
Power consumption pump :
1)
1) Please refer also to technical leaflets of the pump
Control
CC-HC
Power supply:
230 VAC ±10 %, 50 Hz
Max. operating temperature:
0…+50 °C
Temperature precision:
0,1 °C
Regulation characteristics:
Non linear PID
Intelligent 3-point valve drive (finds the operating point)
Degree of protection:
IP 30
Protection class:
II
Output pump:
Relay 250 V, 5 A
Output valve drive (3-point):
2 Triacs 230 V, 2 A
Outside temperature sensor:
CTN 10 KΩat 25 °C (class II – IP 55)
Water (flow) temperature sensor:
CTN 10 KΩat 25 °C (class I – IP 68; except for connector)
Software version:
Displayed when control is turned OFF. Cr_.__
HEAT output
(boiler…)
Fig.4
supply tempera-
ture sensor
Pump1
mixed circuit
outside tempera-
ture sensor (wired)
L
N
3-Point-
valve drive
ARA 600
NR230
L
N
N
L
power supply
230 V AC 50 Hz
L
N
COLD output
or pump2
return tempera-
ture sensor
(option)
Facility to connect an optional temperature limiter TB or
pump relay of a connecting box
.
In that case remove the cable jumper placed at the screw connectors.
M
O
COM
C
1 brown 
2 blue
3 white 
brown 
blue
black 
O
COM
C
Close
Common
Open
C
COM
O

MuB_xx_FBC-HC_EN_2011-08-16 Subject to technical modifications! page 4
EN
Valve drive
NR230-00
ARA 661
Power supply:
230 VAC ±15 %, 50/60 Hz
230 VAC, 50 Hz
Power consumption:
2,5 VA
5 VA
Degree of protection:
n/a
IP 41
Protection class:
II
II
Connection:
Wires, 3 × 0,75 mm²
Wires, 3 × 0,75 mm²
Angle of rotation:
90° electrically limited
90°
Torque:
5 Nm
6 Nm
Running time:
140 s (50 Hz)
120 s / 90°
Direction of rotation:
selectable on terminals
Manual operation:
mechanical disengagement
Indication of position:
yes, reversible scale
Ambient temperature:
0…+50 °C
-5…+55 °C
EMC:
CE accord. 89/336/EWG
EMC 86/336/EEC
Low voltage directive:
CE accord. 73/23/EWG
LVD 2006/95/EC
Maintenance:
maintenance free
n/a
7. MATERIALS
Valves / fittings:
Brass Ms 58
Pipes:
Precision steel pipe, coated
Plastic:
Impact- and temperature resistant
Gaskets:
EPDM-Elastomers or AFM 34
O-Rings:
EPDM
8. TROUBLE SHOOTING
X.
PROBLEM
X.X
Possible cause
Solution
1.
HEATING CIRCUIT IS NOT GETTING WARM
1.1
The optional temperature limiter (TB) has switched off
the pump (UWP).
Cause: TB is set to a very low value.
Set the TB by approximately 10 K higher than the re-
quired flow temperature.
Take into consideration the max. admissible flow
temperature!
Differential gap of the TB: approx. 5 - 10 K.
The control unit may be ready for operation sooner
if the TB is removed for a short time to allow it to cool
down more quickly to reach the switching temperature.
1.2
The temperature of the boiler’s supply water is lower
than the required flow temperature of the UFH.
Set the boiler's supply water temperature to a higher
value.
2.
THE SUPPLY WATER TEMPERATURE CANNOT BE SET TO THE REQUIRED VALUE OR IT FLUCTU-
ATES WITHIN A VERY WIDE RANGE
2.1
The control unit’s SUPPLY and RETURN are not cor-
rectly connected.
Check all inlets and outlets of the control unit for cor-
rect connection. Please take into account Fig. 3.
2.2
The circulating pump’s pressure head/pump stage is
set at a very low value.
Increase the rotation frequency, the pump’s pressure
head/pump stage, respectively.
2.3
The heating load is too big for the control unit used,
i.e., the heat consumption exceeds the rated power of
the control unit. This state may set in temporarily, e.g.,
in case of heating a “cold” floor for the first time.
Check the maximum heat consumption and compare it
with the rated power. If necessary, distribute the heat-
ing circuits to a second control unit / heating circuit.
If the cause is in the initial heating up of a given floor
heating system, the function may be normalized after
the heating up phase. This is possible when the heat-
ing load is at maximum and will then take longer to
achieve the required temperature.