Temptek G-500 Series, Instruction Manual

Page: 45 / 64

Temperature Control Unit : VTO Series with G500 Series Instrument
Page: 45
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: service@Temptek.com
5.3 HEATER REPLACEMENT
A. The heater is a flange mounted assembly and inserted into the cylinder tank and secured
by bolts.
B. The operator can determine if the heater requires replacement when the heater draws “0”
amps or when a continuity check of each heater element is negative.
C. Generally, heaters fail due to low fluid flow, low fluid pressure, air in the system or
defective heating elements.
D. The operator should follow this procedure to replace the heater:
1. Disengage operations and be certain all system pressure is relieved and the
unit’s pressure gauges read “0”.
2. Disengage main power supply. Follow all lock out tag out requirements.
3. Remove the access panel and set aside
4. Drain machine. The machine can be drained by removing the pump casing drain
plug.
5. Remove heater’s junction box cover to locate wiring connections. The operator
should note the wiring connections to ensure correct reinstallation.
6. Disconnect the three power leads from the heater terminals. Remove the power
cord from the junction box.
7. Remove the heater mounting bolts.
8. Remove heater.
9. Before the new heater is installed, the mating surface of the tank should be
cleaned. Once cleaned, place the new heater gasket onto the tank mating
surface. Coat the mating surface with a high temperature gasket sealant.
10. Set new heater into tank. Aligning the bolt pattern of the heater and tank flanges.
11. Replace the heater mounting bolts. Alternate to the opposite bolt while tightening.
12. Reconnect the power cable to the heater terminals. Be certain to tighten the
power cord junction box connector. Replace the junction box cover and the lift-off
cover panel.
E. When complete, restart the unit.