VR2
VR1
L.T.C
Mains Supply
FAN
+10V
Control
Ground
Tacho
Speed Control
FAN
VR2
VR1
L.T.C
Mains Supply
+10V
Control
Ground
Tacho
Speed Control
FAN
E
N
L
LTC FAN
M VALVE
S
W
DIGITAL
ROOMSTAT
BYPASS
TUBE
1
2
3
4
5
6
7
8
9
E
N
L
VR2
VR1
L.T.C
Mains Supply
+10V
Control
Ground
Tacho
Speed Control
N ot e: T he e arth l i nk is d irec tl y
ab ove t he ne gat i ve te rm i na l
on t he E C D C f i lt er.
FAN
E
N
L
S
W
DIGITAL
ROOMSTAT
BYPASS
TUBE
1
2
3
4
5
6
7
8
9
M VALVE
LTC FAN
E
N
L
Fig 3
6
2. Fix the unit to the wall via suitable fixings.
3. Connect the heating system flow and return pipes to the heater pipe work. Pipe entry/ exit
can be made through either the back of the unit or by using the Pipe Knockouts on the bottom
of the unit (See Fig 3). Do not use soldered fittings to connect the heater pipe work as the heat
generated may cause damage to internal wiring and components.
We recommend the use of full-flow service valves. The valves should be accessible after
completion of the installation. We also advise the fitting of an air vent at the highest point on
either the flow or return pipe to remove any air trapped within the system.
4. Open the full flow service valves (see above) and check for water leaks. Remove any
trapped air from the unit via the built in bleed screws as shown in the diagram below.
Note: Ensure the motorised valve is set to the Auto position.
5. Isolate the electrical supply
245
66
176
660
274
A
Model
A
60
595
90
895
Electrical supply
in this side
Pipe Centres
B
4
80
45
Fix to wall using
suitable fixings
B
470
770
85
1
50
120
1195
1070
150
1495
1370
180
1795
1670
3
Caspian CL 60
Wiring Diagram
Caspian CL 90/ 120
Wiring Diagram
