LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual - Manual (Page 49)

39 Service Manual NeoTherm 80 - NeoTherm 285
Remove these
screws
Fig. B19-7 - Removing the air/gas channel and attached
blower
Removing and Replacing the Blower (continued)
9. Now you can remove the air/gas
channel and blower assembly
from the machine. See Fig. B19-
7. Remove the five #25 Torx-head
screws around the air/gas channel
assembly. (These are the outer
screws on the front of the assembly.
The inner screws attach the air/
gas channel cover - do not remove
these.)
Support the assembly as you re-
move the last screws, so it does not
fall. Figure B19-8 shows how the
assembly looks once it has been
removed.
10. Next, remove the gas valve and
Venturi together. These are at-
tached to the blower by two 4mm
cap screws. See Fig. B19-9.
11. Remove the four 4mm screws and
separate the air/gas channel from the
assembly. Now the blower is free.
Gas valve
Venturi
Fig. B19-8 - Blower, gas valve, and
Venturi
Venturi
mounting
screw
Venturi
Fig. B19-9 - Removing Venturi and gas valve
12. The location where you removed the Venturi is
the air intake for the blower. To clean the blower,
blow compressed air through the intake and spin
the impeller.
13. To reassemble, reverse the procedure listed
above.
14. After reassembly, check for gas leaks using a
leak detection solution.
B19
cont.