Thermal Care Vactherm RV, Руководство по эксплуатации, установке и обслуживанию

Страница: 15 / 28

11
the current Set Point and then immediately used the
Increase or Decrease buttons to change the Set
Point until the desired temperature displays. Once
the desired Set Point displays, release all buttons.
After 5 seconds, the display will return to the actual
temperature and the new set point is active.
Step 6 - Adjusting the Vacuum
Adjust the positive/negative flow through the mold
by using the vacuum adjusting valve on top of the
back panel. Start by fully closing this valve so that
the injector makes a vacuum in the return line from
process. The vacuum created allows air to enter the
circuit through any leaks that are present. Opening
the adjusting valve slowly allows water to flow to the
mold and pressurizes the supply line. The leak will
reappear as the pressure increases. Slowly closing
the adjusting valve now eliminates the leak.
The unit is now ready for service.
Preventive Maintenance
Once the unit is in service, we suggest following the
maintenance procedures as closely as possible. The
importance of a properly established preventive
maintenance program cannot be overemphasized.
Taking the time to follow these simple procedures
will result in substantially reduced downtime,
reduced repair costs, and an extended useful lifetime
for the unit. The following is a list of suggested
periodic maintenance.
Once a Week
1. Check to make sure that the To Process
temperature is reasonably close to the Set Point
temperature. If the temperature stays more than
5°F away from the set point, there may be a
problem with the unit. If this is the case, refer to
the General Troubleshooting section of this
manual or contact our Customer Service
Department.
2.
Check the pump discharge pressure. Investigate
further if the pressure starts to stray away from
the normal operating pressure.
3.
Check the pump for leaks in the seal area.
Replace pump seal if necessary.
Once a Month
Repeat items 1 through 3 listed above and continue
with the following.
4.
With the main power shut off, check the
condition of electrical connections at all
contactors, starters, and controls. Check for
loose or frayed wires.
5. Check the incoming voltage to make sure it is
within 10% of the design voltage for the
temperature control unit.
6. Check the amp draws to each leg of the pump
and heaters to confirm that they are drawing the
proper current.
7. Check the heat exchanger inlet strainer and
clean debris out as necessary.
8. Check the condition of the oil and replace as
necessary as instructed by the oil manufacturer.
Once a Year
Repeat items 1 through 8 as listed above and
continue with the following.
9.
Carefully inspect the heat exchanger for signs of
scale build-up and carefully clean and remove
scale as necessary.
CAUTION: The amount of scale build-up is
dependent upon the amount of cooling required for
each process along with the quality of the cooling
water supply. We have supplied the unit with a
copper heat exchanger. We recommend you clean
the heat exchanger thoroughly on a periodic basis, or
after each job, to allow for the longest life and
highest heat removal potential of the unit. If the heat
exchanger becomes completely blocked, lime scale
removal will be impossible.