wc_tx001951gb.fm
62
Operation E 3000
Continued from the previous page.
4. Move the left pump ON-OFF switch (d) to the ON position.
5. Check the pump pressure gauge (e). The following should occur:
During the first minute of operation, the pressure should build to as high as
170 psi.
NOTICE: If the HTF reaches 170 psi (11.7 bar) after only a second or two of
operation, there is a problem. Shut down the machine and rectify the problem
before continuing.
Once flow is established, pressure should be: 125–140 psi (8.6–9.6 bar).
When the HTF is warm, operating pressure should be: 90–110 psi (6.2–7.6
bar).
6. Check the HTF flow indicator (f). The flow indicator should be spinning. If it is
not, there is a problem. Shut down the machine and rectify the problem before
continuing.
7. Repeat steps 4–6 for the right pump.
Result
HTF is now flowing.
4.21 Setting the Operating Temperature
Operating
temperature
Once the HTF is preheated, set the temperature controller to the operating
temperature. Use the chart below as a guide.
75
180
Operation type Recommended Temperature Setting
Ground thawing
80°C (180°F)
Concrete curing
7°C (20°F) above the desired temperature of the con-
crete
Air heating
80°C (180°F)
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