Once you place him on make sure that that port is in the front line up your holes push down and then grab your screws that came with the unit if you haven’t lost them already and just screw down your exhaust adapter it’s also a good idea if you have a magnetic tip screwdriver in case you drop any of these be careful not to drop one down into the unit it is all vented any condensing model themselves are vented with schedule 40 PVC whether it be the intake or whether it be the exhaust you can go to the left or you can go to the right just remember that you’ll have to remove the blocking plate and put it on the opposite side.
So I’m going to grab this other adapter put him on this one doesn’t have any sticker or any sticky back to it so you’ll just have to put him down line up the holes line up the holes here and screw that particular piece down there now that I have those two particular parts on one of the things that you’re going to always want to remember is that this is a condensing model it has two heat exchangers in it the weight of this particular model is 80 pounds it’s a really good idea that you actually get some help to hang this unit on the wall he can be cumbersome he can be kind of difficult one of the things I really wanted to show you was the fact that on the backside of this unit you’ll have these two hanging brackets be really careful if you’re actually going to grab these handles you’ll definitely want gloves it is sharp galvanized steel so get a helper get someone to help you out with this they don’t have to stay for the whole install but it’s just a really good idea to get somebody to help you with this particular unit because it’s .
So heavy and that’s the way it should go in it should just slide down onto that bracket and then this way you know it’s secured to the wall the next thing that you’re going to install once you have the unit on the wall is an isolation ball valve kit now these isolation ball valve kits are not a must but I would highly highly suggest that you actually install water heater one of these at some point or another due to calcium deposits in the heat exchanger you’re going to have to flush the unit with vinegar now whenever you buy a kit no matter who the actual manufacturer is a few things will be inside here and make sure that they’re correct the first thing that you’ll see is a pressure relief valve now there is a tag on this pressure relief valve that actually has a rating for BTU as well as pressure always make sure that it matches the side label to the unit on the right hand side as far as BTUs are concerned if it’s too small it’ll open prematurely and you’ll have to go back for a service call.
So always check that the pressure relief valve is the correct size the other part that you’ll have and they’re marked is a hot side with a red handle and a spot for that pressure relief valve and a cold side for the inlet and it will be marked with a blue handle this particular device right here is where you will hook up your flush kit whether it be vinegar or any of the other devices that you’ll use or any of the other substances that you’ll use for it the only thing that Bosch itself endorses this pure white vinegar contains about five percent acid and it won’t harm any of the piping and it’s definitely safe for people or animals or anything like that so make sure that this valve kit has those particular ports on it but like I said blue for the inlet red for the outlet one of the other things that you’re going to want to use is teflon tape don’t use pipe dope don’t use any type of a sealer if you use too much of it.
You’ll clog up the water flow control turbine in the water flow control valve this will affect the unit it will not fire if that happens your safest bet is to always use teflon tape on the inlet on the outlet and teflon tape on the gas line now at the bottom of the unit located here you’ll see this attention sign and this will designate this as the gas connection just remove the cap take off the label down the next thing that you’ll notice is that we’ve actually marked the bottom in the metal itself as to where the cold is where the hot is where the gas line goes so there isn’t any problem with actually piping this backwards and it should never happen out in the field the other things that you’ll notice down here as far as the fittings are concerned because this is a condensing model this is your condensate drain whenever you’re hooking up the condensate line to this you have to leave a quarter-inch air gap it’s not to be glued to it this is your clean-out cap cap for your trap inside the unit itself cold in pot out and this particular grommet is if you’re going to cascade in units these units can be cascaded electronically if the job is big enough and the demand is high enough from two units all the way up to 24 and of course this is your plugin for your hundred and twenty volt power.