INDIRECT WATER HEATERS
Technical specification – SIT single coil models Water heater model
Storage capacity
Efficiency data - building regulations Heat loss
Efficiency data - ErP and energy label Ecodesign energy label rating Standing loss
General data Dimensions (height) Dimensions (width)
Hot outlet connection (inches) Cold feed connection (inches) Flow/return connection (inches) Weight (empty) Weight (full)
Minimum working pressure Maximum working pressure Electrical requirements
Water heater model
Coil and performance data Coil output (80/60°C) Coil surface area
Flow rate (80/60°C) Pressure loss
Maximum coil temperature Maximum coil pressure
Max draw off capacity (1st hour) at 50°C temperature rise
Heat up time at 50°C temperature rise
kW m2
l/sec kPa °C
bar l/hr min
Technical specification – SDT Twin coil models Water heater model
Storage capacity
Efficiency data - building regulations Heat loss
Efficiency data - ErP and energy label Ecodesign energy label rating Standing loss
General data Dimensions (height) Dimensions (width)
Hot outlet connection (inches) Cold feed connection (inches) Flow/return connection (inches) Weight (empty) Weight (full)
Minimum working pressure Maximum working pressure Electrical requirements
at 50°C temperature rise (top coil only)
Coil and performance data Coil output (80/60°C) - lower / upper Coil surface area - lower / upper Flow rate (80/60°C) - lower / upper Pressure loss - lower / upper Maximum coil temperature Maximum coil pressure Max draw off capacity (1st
hour) at 50°C temperature rise (both coils) hour) litres kWh/24hr W
mm mm BSP BSP BSP kg kg
bar bar
kW m2
l/sec kPa °C
bar l/hr
Heat up time at 50°C temperature rise (top coil only) min Max draw off capacity (1st
Heat up time at 50°C temperature rise (both coils)
l/hr min
litres kWh/24hr W
mm mm BSP BSP BSP kg kg
bar bar
SIT300 SIT450 310
427 0.62 B 57.4
1765 609 1½" 1½" 1" 80
390 0.5
10.0 SIT300 34
1.25 0.41 6.4
110 10
828 32
0.85 B 67.7
1734 711 1½" 1½" 1"
96.5
523.5 0.5
10.0 SIT450 56
2.05 0.68 14
110 10
1289 27
SIT600 575
2.88
n/a 120
1978 740 2 2 1
114 689 0.5 6.0
SIT600
54 2
0.66 27.4 110 6
1389 37
SIT900 SIT1100 SIT1400 SIT1900 SIT2500 SIT3000 840
1125 3.36
n/a 137
1600 1080 2 2 1
162
1002 0.5 6.0
3.38
n/a 150
2100 1080 2 2 1
195
1320 0.5 6.0
1380 4.14
n/a 160
2120 1180 2 2 1
241
1621 0.5 6.0
230V /1Ph/ 50hz* SIT900 SIT1100 SIT1400 SIT1900 SIT2500 SIT3000
81 3
0.99 33.2 110 6
2065 36
108 4
1.32 21.1 110 6
2758 36
108 4
1.32 21.1 110 6
2962 45
162 6
1.98 21.1 110 6
4286 40
162 6
1.98 21.1 110 6
4786 54
162 6
1.98 21.1 110 6
5186 65
SDT300 SDT450 SDT600 SDT900 SDT1100 SDT1400 SDT1900 SDT2500 SDT3000 299
416 0.60 B 57.4
1765 609 1½" 1½" 1" 85
384 0.5
10.0 34/23 0.83 B 67.7
1734 711 1½" 1½" 1"
101 517 0.5
10.0 56/40
110 10
575 2.88
n/a 120
1978 740 2 2 1
114 689 0.5 6.0
27/27 1.25/0.85 2.05/1.50 1.0/1.0
100 6
840 3.29
n/a 137
1595 1080 2 2 1
162
1002 0.5 6.0
27/40 1.0/1.5
100 6
1125 3.60
n/a 150
2100 1080 2 2 1
195
1320 0.5 6.0
54/40 2.0/1.5
100 6
1380 3.84
n/a 160
2120 1180 2 2 1
241
1621 0.5 6.0
230V /1Ph/ 50hz* 54/54 2.0/2.0
100 6
81/67 3.0/2.5
100 6
81/81 3.0/3.0
100 6
81/67 3.0/2.5
0.41/0.28 0.68/0.5 0.33/0.33 0.33/0.495 0.66/0.495 0.66/0.66 0.99/0.825 0.99/0.99 0.99/0.825 6.4/1.55 14/7.12 12.2/12.2 12.2/14.3 19.7/14.3 19.7/19.7 28.1/23.4 28.1/28.1 28.1/23.4 110 10
100 6
537 23
1220 19
*For use of 230v thermostats only Energy Label, product fiche and ErP data table are available at
www.lochinvar.ltd.uk
Page 51
901 18
1985 16
924 50
1389 37
1360 37
1824 44
1588 59
2517 42
2033 53
2962 45
2652 49
4046 44
3393 65
4786 54
3552 104
4969 42
1875 4.13
n/a 172
2050 1380 2 2 1
291
2166 0.5 6.0
2500 4.56
n/a 190
2600 1380 2 2 1
370
2870 0.5 6.0
3000 4.87
n/a 203
3040 1380 2 2 1
427
3427 0.5 6.0
1875 3.75
n/a 172
2050 1380 2 2
1½ 291
2166 0.5 6.0
2500 5.00
n/a 190
2600 1380 2 2
1½ 370
2870 0.5 6.0
3000 6.00
n/a 203
3040 1380 2 2
1½ 427
3427 0.5 6.0
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