Lphw Models - Thermoscreens T Series Operation And Maintenance

8.

LPHW MODELS

For LPHW models ensure that water isolation valves are fitted in the flow and return pipework
adjacent to the air curtain and connected correctly as shown in the diagram in Appendix 1.
For the design of the water pipework system and pump, water flow rates and pressure drops for
maximum heat output of the air curtain are given in Table 2 below.
Air Curtain
T1000WR, 2-row (12kW)
T1500WR, 2-row (18kW)
T2000WR, 2-row (24kW)
Air Curtain
T1000WR, 3-row (12kW)
T1500WR, 3-row (18kW)
T2000WR, 3-row (24kW)
NOTE: Water Pressure Drop is across the flow and return pipework to the air curtain and includes for the
coil fitted inside the unit and the valve fitted in the heating pipework to the unit.
Water flow rates and pressure drops at different water temperatures can be calculated using the
Thermoscreens coil calculation programme. Visit the Thermoscreens website for details.
The installer must connect the 3-port valve in the heating pipework as shown in Figure 11 below:
wire valve to pcb inside air curtain
T9901012-1-1 UK (v9)
Water Flow Rate
(l/min at 82/71°C)
15.6
23.4
31.2
Water Flow Rate
(l/min at 60/40°C)
8.6
12.9
17.1
22mm pipe
22mm pipe
A
A/B
22mm pipe
22mm pipe
B
Table 2
Water Pressure Drop
(kPa)
16.1
10.4
16.3
Water Pressure Drop
(kPa)
8.3
18.2
15.0
R
F
E
L
T
O
U
W
R
N
Fig 11
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