Temptek G-500 Series, Instruction Manual

Page: 38 / 64

Temperature Control Unit : VTO Series with G500 Series Instrument
Page: 38
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: service@Temptek.com
recommendation, plant service personnel should take measures to
reduce drain line pressure.
4. Instrument defective. The instrument is life-tested and found to be field reliable.
However, in the case where the instrument is determined to be defective, the
operator contact the Service Department for information. The instrument is not a
field serviceable component.
4.5 UNIT UNDERHEATS
A. This is evidence by operations with To Process temperatures consistently below the
selected setpoint temperature.
1. Process water leakage. On units equipped with the cooling heat exchanger,
a defective cooling valve allows water to circulate through the heat exchanger
providing unwanted cooling. A defective cooling valve should be repaired
immediately.
2. More flow than necessary being supplied to pump seal cooling. Throttle
pump seal cooling to 1/2 GPM at 100°F maximum temperature.
3. Heater element failure. A failed heater element will not input adequate heat
into the process to elevate the process water temperature. The operator must
check the amps at the heater contactor with the contactor energized. Zero amps
at the contactor indicate a failed heater or burnt wire connections. The operator
should remove the failed heater and replace with a new heater according to the
procedure outlined in section 5.2.
4. Unit capacity too low. This occurs when the process requires more heat than
the unit is capable of producing. The only option in such cases is to install a unit
with an adequate heater kW rating for the load.
5. Instrument defective. The instrument is life-tested and found to be field reliable.
However, in the case where the instrument is determined to be defective, the
operator contact the Service Department for information. The instrument is not a
field serviceable component.