42
Viscount GTS -
Installation & Servicing
INSTALLATION
63 CONTROL PANEL (General)
Electrical control panel, equipped with temperature control.
The control panel carton contains:
Control panel complete with burner connection harness.
The control panel incorporates a boiler thermostat controller,
a thermometer and a safety thermostat.
The boiler thermostats -
one controls the maximum boiler
operating temperature. The other controls the high/low
operation if a 2 stage burner is fitted.
The safety thermostat
(with manual reset) - if the boiler
temperature rises abnormally (110
o
C), the safety thermostat
cuts off the burner electricity power supply.
WARNING
. In this case, you must call your installer
Refer to Frame 69 for specific details of panel.
64 ELECTRICAL CONNECTIONS
WARNING
. The electrical connections must be made by a
qualified professional. The electrical wiring has been
carefully checked in the factory and the internal connections of
the control panel must not be modified in any event.
The electrical connections should be made following the
information shown on the electrical diagrams delivered with
the unit and the directions given in the instructions.
The electrical connection must comply with standards in force.
The equipment must be powered by a circuit containing a
remote double-pole switch with opening > 3mm.
WARNING.
The boiler must be earthed.
All connections must be made using the terminal blocks
provided for this purpose at the back of the boiler control
panel.
Connections cables are brought inside the boiler through
cut-outs provided in the boiler back panel, which are large
enough for use of commercially available conduit if required.
These cables are secured at the back of the control panel
using cable clamps (cable clamps supplied in a separate
pack) that are to be installed on the sheet metal.
65 BASIC CONNECTIONS
1.
To gain access to the connection strip, unscrew the three screws on
the rear of the control panel and open the panel.
2.
Pass the connecting cables to the control panel through the two cut-
outs in the rear panel of the boiler and route them to the front via the
cable channels.
3.
Pass the cables into the control panel through the rectangular
openings in the front top panel.
4.
Secure the cables to the base of the control panel with the cable
clamps.
5.
Connect the main supply to terminals 1, 2 and 3 of the connecting
strip as shown. (See also Frame 66)
3
5
1
4
2
12
11
10
9
8
7
6
5
4
VA
S3
T8
T7
T6
T 2
T1
L1
N
230V
50H
z
L
N
ALI
3
4
1
2
5
6
7
8
9
10
11
12
L
4
N
ALI
5
6
7
8
9
10
11
12
230 V / 50 Hz
N
L1
T1
T2
T6
T7
T8
S3
VA
3 x 0,75 mm
2
har70
4
9
66 CONNECTING OPTIONAL FEATURES
Flow Switch / Optional Safety Devices
If a flow switch or other safety control is to be included in the
system, connect the device(s) in series in the safety circuit,
(i.e. between terminal 5 of the connecting strip and burner
terminal L1).
Burner Alarm Indicator
If an alarm indicator is to be included it should be
connected across terminal 12 (live) and terminal 4 (neutral).
Safety Thermostat Alarm Indicator System
1. The unused insulated terminal on the safety thermostat
may be used to connect an alarm signal. (This terminal
becomes live if the safety thermostat trips.)
2. Remove the insulation and connect the live wire from the
alarm indicator to the unused terminal using a suitable
spade connector and the neutral to terminal 4.
12
11
10
9
8
7
6
5
4
VA
S3
T8
T7
T6
T 2
T1
L1
N
230V
50Hz
L
N
ALI
vis9152
INST
ALLA
TION
