LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 81)

71 Service Manual - NeoTherm 500
Fig. C5-12 - Dirty heat exchanger
Fig. C5-13 - Very dirty heat exchanger
Fig. C5-14 - Drain hose connected under the
heat exchanger
Cleaning the Burner and Heat Exchanger (continued)
Refractory
material
Stainless steel
coils (dirty)
C5
cont.
The heat exchanger in Fig. C5-11 is new, so it
is clean. Figure C5-12 is a photo of a dirty heat
exchanger. Normally you will find a heat exchanger
that looks like this. However, sometimes a heat ex-
changer can be really dirty, as shown in Fig. C5-13.
3. Attach one end of the drain hose to the condensate
drain located under the heat exchanger. Run the
other end of the hose to a bucket or drain.