14.STANDARD HEAT TRANSFER SYSTEM TROUBLE SHOOTING CHART
| Problem | Cause | Corrective Action | |
|
| System temperature too high for oil | See fluid manufacturer’s data for | |
|
| causing vapor lock | maximum oil temperature | |
|
|
|
| |
|
| Vapors lock due to steam or air in oil | Bleed air & steam from system, change | |
| Insufficient suction pressure (0 or |
| oil if problem continues | |
J | vacuum), pump noisy, gauges |
|
| |
Net positive suction pressure too low | Raise expansion tank to increase suction | |||
| vibrating, discharge pressure low |
| head, static head should be | |
| (below 20 psig) |
| ||
|
| (See expansion tank location No. 6) | ||
|
|
| ||
|
|
|
| |
|
| Strainer plugged | Remove and clean strainer | |
|
|
|
| |
|
| Valve closed | Check all valves | |
|
|
|
| |
| High discharge pressure over 40 psig, | System piping blocked or restricted | Check all valves, check strainer | |
|
|
| ||
K | pressure gauges fluctuating rapidly, |
| Check process piping sizing, check for | |
pump noisy, expansion tank normal, | Process piping blocked or restricted | closed valves or improperly installed | ||
| system operating on bypass relief | automatic valves, check all bleed | ||
|
| |||
| valve |
| valves for air or steam | |
|
| Steam or water in oil | Bleed system, change oil | |
|
|
|
| |
|
| Expansion tank too low | Expansion tank should be mounted 15 ft. | |
L | Expansion tank overflows or “burps” |
| above system | |
(over 220°F) |
|
| ||
Expansion tank line too short | Lengthen expansion tank line to cool oil | |||
|
| |||
|
|
| and provide cold oil seal | |
|
|
|
| |
|
| Tank too small for system | Check volume on process piping | |
|
|
|
| |
|
| Set thermostat above process temperature | ||
M | Control relay #1 will not close |
| and reset | |
|
| Pressure switch not closed | See N | |
|
| Switch set wrong | Set pressure switch to approximately 5 psi | |
|
|
| over suction gauge pressure | |
|
|
|
| |
N |
|
| Check pump & motor rotation, see arrow | |
Pressure switch will not close | Pump running backwards | on motor, reverse phase lead on circuit | ||
|
|
| breaker | |
|
|
|
| |
|
| Not enough or no fluid in system | Check fluid levels in expansion tank, | |
|
|
| make sure all valves are open | |
|
|
|
| |
|
| Pump cavitating | See O | |
|
|
|
| |
|
|
| Bleed system periodically until all air or | |
|
| Air or steam in system | stem is removed | |
|
| Insufficient bleed valves in process | ||
O |
|
| ||
Pump noisy and/or cavitation |
| piping to remove trapped air | ||
|
|
|
| |
|
| Contaminated oil | Change oil | |
|
|
|
| |
|
| Pump damaged by overtightened |
| |
|
| packing gland | Replace pump | |
|
|
|
| |
|
| Insufficient suction pressure | Suction pressure should be | |
|
|
|
|
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: | www.chromalox.com |