Installation Manual 5.1.2
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water. If filter is not changed / cleaned on a regular basis expensive air coil cleaning may be required during
preventative maintenance checks.
• Give the unit an occasional visual check. Look for water around the base of the unit and listen for any unusual
noises.
• Closed loop systems are a sealed system unless an auto purge tank is used. If totally sealed they require no physical
maintenance short of visual inspection for leaks. If your system was installed with an auto purge tank / kit it is
recommended to check the fluid level in the tank once a month when you replace the air filter. Ensure the fluid
level in the tank is between ½ and ¾ of the way full. It should be rare to have to add fluid after the first year. If you
are required to add fluid more than a few times after the first year contact the installing dealer to have the anti-
freeze levels checked. Never fill more than ¾ of the way full to prevent over flow.
IMPORTANT NOTICE: UNITS THAT UTILIZE GROUND LOOPS MUST MAINTAIN A MINIMUM OF 20% METHANOL
OR 25% PROPYLENE GLYCOL AS AN ANTIFREEZE SOLUTION IN THE UNIT AND GROUND LOOP AT ALL TIMES.
FAILURE TO DO SO WILL ALLOW REFRIGERANT TEMPERATURES TO DROP, CAUSING INTERNAL FREEZING OF THE UNIT
TO OCCUR, CAUSING SEVERE DAMAGE TO THE UNIT. DAMAGE TO THE UNIT CAUSED BY FAILURE TO MAINTAIN
PROPER ANTIFREEZE LEVELS IS NOT COVERED UNDER WARRANTY.
• Open loop systems require well water to be pumped through the system. For this reason Hydro-Temp recommends
the installing dealer to install isolation valves and a water strainer on the entering water line feeding water to the
Hydro-Temp system. Be aware of the location of these components in the event the strainer needs to be cleaned
more often than once a year during your preventive maintenance check. Be aware of all isolation valves so cleaning
can be done with minimal water spillage. It’s a good idea to be familiar with the location of the isolation valves in the
event of a major water leak. All open loop systems have a discharge water line that discharges the water to a discharge
well, creek, pond, etc. Check local state and county codes for proper discharge of water. Be aware of discharge
location and check occasionally to insure proper drainage is occurring. During the winter, insure discharge is protected
from freezing. Do not attach any kind of sprinkler to the end of the discharge water line as the increase in back
pressure will result in decreased water flow and damage the Hydro-Temp system.
• Fan motors are permanently lubricated and do not need further lubrication. Motors and fan assemblies will be
inspected on a yearly basis for wear during preventative maintenance checks.
• DHW plumbing consist of a closed recirculating loop which is purged free of air by the installing dealer. If any
maintenance or hot water tank replacement is done, insure the DHW plumbing is properly purged of air. Consult with
your installing dealer before draining the hot water tank for proper procedures.
• During your annual preventative maintenance check, inspect the drain pans for debris to avoid condensate tubing
blockage. Tubing needs to be checked at both ends to ensure blockage doesn’t clog up the pipe from the inside or
outside of the house if exposed.
• If the system is equipped with a ultra-violet light, the bulb will need to be replaced every 18 months. Due to the
hazard of UV exposure, the bulb should only be replaced by a trained professional.
• Most systems are now equipped with controllers that allow for a system lock out feature. If the system trips a
protective limit switch 3 consecutive times the system will lockout. If the system locks out power will need to be
cycled to reset the lockout. Before resetting the lockout you must always insure the problem causing the lockout has
been repaired. If unsure consult your installing dealer before resetting the lockout.
• Be aware of all breaker locations. Some systems may have two breakers for the compressor section. If the system is
equipped with auxiliary heat a separate breaker will be needed to supply power to auxiliary heat strips.
ADDITIONAL REMINDERS:
Chemicals, cleaners, inhibitors or other products that corrode or attack copper (such as Trisodium Phosphate) should
never be placed into the water circulation loop(s) connected to the Hydro-Temp equipment or stored in the same room
as the Hydro-Temp equipment. Failure to follow this requirement will void the equipment warranty.
Protect the Hydro-Temp™ unit from freezing temperatures. If the system is in your attic or outside special precautions
may need to be taken to ensure freeze protection.
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