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Product performance
Heat Output at 80°
Heat Output at 75°
Model
Low
Med
High
Low
(kW)
(kW)
(kW)
(kW)
CASPIAN LST 60
1.0
1.6
2.2
0.9
CASPIAN LST 90
3.0
3.5
3.9
2.8
CASPIAN LST 120
5.0
5.3
5.7
4.7
CASPIAN LST 150
6.2
6.7
7.2
6.0
CASPIAN LST 180
7.7
8.2
8.7
7.5
Heat Output at 60°
Heat Output at 55°
Model
Low
Med
High
Low
(kW)
(kW)
(kW)
(kW)
CASPIAN LST 60
0.7
1.0
1.3
0.6
CASPIAN LST 90
2.1
2.5
2.9
1.9
CASPIAN LST 120
3.6
4.0
4.4
3.2
CASPIAN LST 150
4.9
5.4
5.9
4.6
CASPIAN LST 180
6.4
6.9
7.4
6.1
Pressure Drop
Model
High
Medium
Low
Flow & return
(kPa)
(kPa)
(kPa)
connections
CASPIAN LST 60
1.5
1.1
0.9
CASPIAN LST 90
3.9
2.3
1.6
CASPIAN LST 120
7.3
5.5
5.3
CASPIAN LST 150
8.6
6.8
6.2
CASPIAN LST 180
11.3
8.6
7.9
Sound Levels
Model
High
Medium
Low
(dBA)
(dBA)
(dBA)
CASPIAN LST 60
50
43
35
CASPIAN LST 90
53
45
37
CASPIAN LST 120
57
48
38
CASPIAN LST 150
59
47
36
CASPIAN LST 180
59
47
36
Heat output testing based on BS EN442 using mean water temperature, 20°C
entering air temperature, 10° temperature drop.
Sound levels measured at 3m in front of the floor mounted model.
6 | SmithsEP.co.uk | Issue 002 - November 2022
Heat Output at 70°
Heat Output at 65°
Med
High
Low
Med
High
Low
(kW)
(kW)
(kW)
(kW)
(kW)
(kW)
1.4
1.9
0.8
1.3
1.7
0.8
3.2
3.7
2.6
3.0
3.5
2.4
5.1
5.5
4.4
4.8
5.2
4.0
6.5
7.0
5.7
6.2
6.7
5.3
8.0
8.5
7.2
7.7
8.2
6.8
Heat Output at 50°
Med
High
Low
Med
High
(kW)
(kW)
(kW)
(kW)
(kW)
0.8
1.1
0.6
0.7
0.8
2.2
2.6
1.6
2.0
2.3
3.6
4.1
2.8
3.2
3.7
5.1
5.6
4.2
4.7
5.2
6.6
7.1
5.7
6.2
6.7
Total Power Consumption
Fused
Low
Medium
High
spur
(Watts)
(Watts)
(Watts)
22mm
3A
26
41
55
22mm
3A
33
59
85
22mm
3A
33
79
125
22mm
3A
50
119
188
22mm
3A
66
158
250
Casting
Fan
colour
only
white
•
white
•
white
•
white
•
white
•
Wiring diagrams
Caspian LST 60
Med
High
(kW)
(kW)
1.1
1.5
2.8
3.2
4.4
4.8
5.8
6.3
7.3
7.8
VR2
VR1
Speed Control
MVALVE
Water Capacity
Blue
(Litres)
0.92
1.50
Caspian LST 90 | 120 | 150 | 180
2.08
2.58
3.18
VR2
VR1
Speed Control
MVALVE
PROBE
LTC FAN
Brown
Brown
Brown
Brown
+10V
Blue
Control
Ground
Tacho
1
2
3
Brown
Blue
FAN
Green
Brown
PROBE
LTC FAN
Brown
Brown
Brown
Blue
EC DC
Brown
Filter
Brown
Note: The earth link
is directly above the
negative terminal on
the EC DC filter
Blue
Brown
+10V
Control
Ground
Tacho
1
2
3
Brown
Blue
FAN
Green
Brown
Blue
White
Red
Brown
11 10 L7 N6 3
2
DIGITAL
Brown
ROOM STAT
BYPASS
TUBE
LTC
Brown
S
W
Summer Winter Switch
Brown
4
5
6
7
8
9
E
N
L
Thermostat Link
(optional)
Brown
E
N
L
Mains Supply
White
Brown
Red
11 10 L7 N6 3
2
DIGITAL
Brown
ROOM STAT
BYPASS
TUBE
LTC
S
W
Summer Winter Switch
Brown
4
5
6
7
8
9
E
N
L
Thermostat Link
(optional)
Brown
E
N
L
Mains Supply
Issue 002 - November 2022 | SmithsEP.co.uk | 7
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