PO Box 1037
1301 Sanders Ave. SW
Massillion, OH 44648

Phone: 330.837.5141
FAX: 330.837.0558

FAQ Cooling Systems

Click on Question to link to the answer....

  1. Question: Is my system marked with identification numbers?
  2. Question: Can I use automotive antifreeze in my system?
  3. Question: Can I use galvanized piping in my closed loop glycol system?
  4. Question: What type of glycol should I use?
  5. Question: Why is the coil in my evaporative cooling system starting to indicate signs of scaling and corrosion, and the sump showing signs of sludge buildup?
  6. Question: What field wiring is required for a HydroThrift Cooling System?
  7. Question: Can a system be used to cool more than one piece of equipment?
  8. Question: What is the operating liquid level of the vent and surge tank?
  9. Question: What size piping should be used?
  10. Question: How does the automatic pump alternator work?
  11. Question: Our system conditions require that we operate the pump at reduced capacity. How is this accomplished?
  12. Question: What spare parts does HydroThrift recommend for stock?
  13. Question: Is there a minimum spare parts order requirement?
  14. Question: May I order spare parts directly from HydroThrift Corporation?
  15. Question: How do I make a return of failed components under warranty?
  16. Question: Should my requirement change, can modifications be made to my HydroThrift system?
  17. Problem: Our HydroThrift Cooling System employs an evaporative fluid cooler. The sump liquid temperature is 32oF and the sump heat selector switch is in the "on" position, but the heater is not operational.
  18. Problem: Our HydroThrift System electrical enclosure has a PLC, and the alarm lights will not go out.
  19. Problem: Our system has a PLC (programmable logic controller) with a panel-mounted, LCD Operator Panel. Everything seems wrong and/or the operator panel is non-responsive.

 

 

 

Question: Is my system marked with identification numbers?
Answer: Yes. Inside the door of the electrical enclosure is found a nameplate listing the model number, serial number, and other pertinent information. When contacting the factory regarding your system, it is helpful to have these numbers readily available for the best possible customer service.

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Question: Can I use automotive antifreeze in my system?
Answer: No. Automotive antifreeze is not recommended for industrial use. It has a propensity to have a foaming characteristic. It may also contain leak prohibitors and silicons, which cause a scaling tendency over time, and may also lead to clogging.

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Question: Can I use galvanized piping in my closed loop glycol system?
Answer: No. Galvanized pipe or components should not be used with an inhibited glycol system. Sludge formation is possible due to the reaction of corrosion inhibitors with the galvanization.

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Question: What type of glycol should I use?
Answer: Commercial or industrial grade glycol, such as Texcool™ Inhibited Heat Transfer Fluid, Union Carbide Ucartherm, and Dow Chemical Dowtherm SR-1. The particular application of your cooling system may determine the type of glycol used. The concentration of heat transfer fluid in even the most carefully operated and maintained systems will eventually degrade. It is CRITICAL that the condition of the fluid be periodically evaluated. Periodic evaluation must also be made to ensure that the heat transfer fluids inhibitor levels are correct, and to also ensure the fluid's pH levels do not shift toward an acid condition, causing corrosion and ultimate equipment failure.

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Question: Why is the coil in my evaporative cooling system starting to indicate signs of scaling and corrosion, and the sump showing signs of sludge buildup?
Answer: In evaporative cooling equipment, the heat rejection is accomplished by evaporation of a portion of the water being circulated through the fluid cooler. As this water evaporates, the impurities originally introduced with the makeup water remain in the circulating water. To prevent an excessive buildup of impurities in the circulating water, a small amount of water must be "bled" from the system. This is accomplished by the opening the bleed valve located on the discharge side of the spray pump. The bleed rate is approximately 2 GPM per million BTU/Hr of heat rejection.

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Question: What field wiring is required for a HydroThrift Cooling System?
Answer: HydroThrift provides single point wiring for incoming power, or a power distribution block on the line side of a disconnect switch, if provided. The fluid cooler fan motor(s) are field wired from load side of motor starters to the fan motor(s).

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Question: Can I use the circulating pumps to fill the system?
Answer: Yes. The vent and surge tank can be filled, and the pump then started and run until the liquid gets to the bottom of the sight glass, then turned off. This sequence can be repeated until the system is full. (Note: a dual pump system incorporates check valves to prevent backflow into the pump. A single pump system, however, uses a discharge isolation valve which must be closed when the pump is turned off.

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Question: Can a system be used to cool more than one piece of equipment?
Answer: Yes. When the system is installed to cool more than one piece of equipment, a balancing valve should be installed on the return branch of each piece of equipment to equalize pressure drop and insure adequate flow to each.

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Question: What is the operating liquid level of the vent and surge tank?
Answer: The liquid level should be about ¾ up on the sight glass. This will provide adequate room for expansion and function as an air cushion.

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Question: What size piping should be used?
Answer: Cooling water piping should be run full size between the pump and control unit and the fluid cooler, when the components are located close together. The lines should be sized to limit the pressure drop to a maximum of 5 PSIG between the pump and control unit and fluid cooler.

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Question: How does the automatic pump alternator work?
Answer: The alternator switches to the non-running pump every time the power to the unit is interrupted. This device will also switch power to the standby pump in case of failure of the running pump, and will switch back automatically to the pump that has been operating if the standby pump fails and the unit is turned off and restarted.

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Question: Our system conditions require that we operate the pump at reduced capacity. How is this accomplished?
Answer: A valve on the discharge side of the pump must be throttled to operate the pump at reduced capacity. NEVER THROTTLE THE SUCTION LINE! When operating the system for extended periods of time at reduced discharge, much of the pump's power will go into the liquid in the form of heat. A bypass must be provided under these conditions to prevent the liquid from vaporizing in the pump.

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Question: What spare parts does HydroThrift recommend for stock?
back to top Answer: Typical recommended spare parts for HydroThrift cooling systems are fuses, pump seal repair kits, indicating light bulbs, and fan motor(s). Keeping these parts in inventory will considerably decrease system downtime should a failure occur. If you would like a list of system-specific recommended spare parts, one may requested by sending an email with your system model and serial number.

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Question: Is there a minimum spare parts order requirement?
Answer: Yes. HydroThrift requires a minimum order of one hundred dollars ($100 USD). Terms are Net cash 30 days from date of shipment.

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Question: May I order spare parts directly from HydroThrift Corporation?
Answer: In keeping with the agreements of our manufacturer's representatives, those customers having local representation must order from them.

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Question: How do I make a return of failed components under warranty?
Answer: All returns must be shipped prepaid with a return authorization number. Please contact the factory, should a failure under warranty occur, for return information and authorization. Please note HydroThrift Corporation's Terms and Conditions of Sale regarding warranty policies.

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Question: Should my requirement change, can modifications be made to my HydroThrift system?
Answer: In most circumstances, yes. Please contact HydroThrift Corporation Engineering staff to discuss what options are available.

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Problem: Our HydroThrift Cooling System employs an evaporative fluid cooler. The sump liquid temperature is 32oF and the sump heat selector switch is in the "on" position, but the heater is not operational.
Solution: The probable cause is the operation of the spray pump. The sump heater is interlocked with the spray pump. These components will not operate at the same time.

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Problem: Our HydroThrift System electrical enclosure has a PLC, and the alarm lights will not go out.
Solution: The alarm indication lights are connected through the PLC. In order to extinguish the indicating lights, push and hold the "Alarm Silence" pushbutton for three (3) seconds. This will reset all alarms.

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Problem: Our system has a PLC (programmable logic controller) with a panel-mounted, LCD Operator Panel. Everything seems wrong and/or the operator panel is non-responsive.
back to top Solution: Interrupt the system by pressing the STOP key and a few seconds later pressing it again. If in menu mode, press the CLEAR/ABORT key. To clear all registers and reset to factory ship status, press the STOP key and then simultaneously the F1 and F3. Then press STOP again. The pump alternator will be set OFF and must be turned ON to begin normal operation.

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