Making 7 gals of wort from 5 gal recipe

My brewing partner(and only son) ordered a Helles kit from NB last week to brew today. He failed to consider that we do not have any way to properly ferment with the lager yeast that came with it.
We have in our yeast bank: A: WL310 San Fran lager yeast. B:Wyeast 3056 Bavarian Wheat.
We are able to use either one properly. Last night we agreed to seek assistance in “expanding” the recipe to 7 gals and split wort into two fermenters. Any suggestions for additions to this kit to make 7 gal wof wort. We have mash tun and brew pot size to make this work. LBS is open at noon.

[quote=“deadfall”]My brewing partner(and only son) ordered a Helles kit from NB last week to brew today. He failed to consider that we do not have any way to properly ferment with the lager yeast that came with it.
We have in our yeast bank: A: WL310 San Fran lager yeast. B:Wyeast 3056 Bavarian Wheat.
We are able to use either one properly. Last night we agreed to seek assistance in “expanding” the recipe to 7 gals and split wort into two fermenters. Any suggestions for additions to this kit to make 7 gal wof wort. We have mash tun and brew pot size to make this work. LBS is open at noon.[/quote]
To increase the total volume, you can probably just increase the Pilsner malt and 60’ hops proportionately, and still have a decent Helles recipe. If you want to stick to the original recipe, just increase everything proportionately.

If you got the 2308 yeast with your kit, it is tolerant of reasonably high fermentation temperatures. It can be used to make a pretty good, and clean, Steam Beer at Ale fermentation temperatures. If you can keep the fermentation temperature below 60F, you’ll make a pretty decent Lager. If you can keep it near 50F for the first few days of fermentation, you can make an excellent Lager.