Hey guys and gals!
The Hydra stated chilling times are based on following our recommendations
here.
If you are not seeing a 3 minute chilling time for 5 gallons to 10F above your chilling water temp you can check your flow rate of chilling water through the chiller by timing how long it takes to fill up a graduated fermenter. The Hydra performs best at around 6 GPM (i.e. filling to the 5 gallon mark in 50 secs = 6 Gallons Per Minute).
If you are not at 6 GPM on the output of the chiller, you can look at ways to increase your flow rate by keeping your feed hoses as short as possible (under 10') and making sure all your hoses and fittings for your chilling water are 5/8" I.D. or larger (this includes any cam-locks or shut off valves, the cheaper fittings and valves will usually have a much smaller actual I.D.).
If you have around 6 GPM of chilling water flow rate and are not seeing the 3 minute chilling time, you can try changing your method of wort agitation. Along those lines, we have found that moving the chiller around or stirring the wort with a spoon/mash paddle is faster than using a pump and whirlpool arm.
For those of you suffering from high ground water temps, we do not recommend using a pre-chiller since they will cut off the flow rate of the chilling water and result in slower chilling times. Our recommendation is to use the Hydra hooked up to a garden hose spigot until the wort is 10F above your chilling water temp (it should be 3 minutes with 5 gallons of wort). At the 10F above mark, we recommend using a utility pump similar to
this one and pump ice water directly through the Hydra.
This is important, do not recirculate the chilling ice water, ever. If you recirculate the chilling water, you are ruining the temperature differential in the chilling water container. When we tested the Hydra with the above setup, we chilled 5 gallons of wort to 67F in 5 minutes using 80F tap water and 5 gallons of ice water with 12lbs of ice added. The ice water will need to be prepped before you start the chilling process to give the ice time for the transfer of energy. You should expect the ice water to be around 35F at the time of use with little to no ice left in the water.
If already have a pre-chiller and would prefer not to buy any additional equipment, you can use the pre-chiller, but do not hook it up inline with the Hydra until you are at 10F above your tap water temp, again, a pre-chiller is going to substantially reduce your chilling water flow rate, so don't add it inline until you really need it.