Well, got a fine day yesterday, so did the commissioning brew on the new rig, a simple saison I've done a few times before. A very easy brew day by all accounts, and somewhat unexpectedly.
Started at 7:45am, I had tested the HLT the day before so it was still at 45 after being 56 at 3pm the day before. The insulation works well! It wasn't until after 8:30 that I doughed in, 2400w is somewhat under powered for 70l. I have a timer switch, but thought I should experience the full horror before I used it.
The recirc pump needs a valve plumbed in to throttle it back, I slowed it as much as I could with the speed controller and 3 way valve, but it was still too fast, compacting the bed to the point that when I switched it over to transfer to the kettle ( throttled by a separate valve) the entire grain bed sprang up off the false bottom, although I got no grain in the kettle, the wort was not as clear as it had been in the MLT.
Another drama concerned mash pH. Should have been 5.4, and wound up at 5.1. I couldn't work out why, and didn't bother correcting it. I found the reason when I pulled the HLT out to dump the water during clean up. A solid clump of salts stuck to the bottom. I'll make an extension for the HLT return to increase the agitation at the bottom of the tank to stop this, and also to stop it sounding like a drunk pissing in a garbage can while recirculating.
All in all it was a very easy brew day, hit all my numbers, and had beer in the fermenter in 4 hours. Cleanup was much the same as before, but speeded somewhat by the extra hot water available in the HLT. The CIP process starts by pumping hot water from the HLT to the hosed out MLT and recirculating with PBW while the boil is under way. This same water is pumped to the kettle once the boil is over and it has been hosed out. This is then recirculated through the chiller via the power whirlpool. Clean water recycled from the chiller cooling water is used to rinse and then to water the garden.
The whole day took around 8 hours from go to having everything tided up to SWMBO pleasing standards, and seemed very relaxed compared to the old rig.
Will post up some pics soon.
Cheers!
FB