LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 31)

21
Service Manual - NeoTherm 500
Procedure - Replacing the control box
1. To remove the cover, remove the two sheet metal
screws on the sides.
2. Disconnect the three wires on the terminal strip,
and the violet wire that runs to the connector
above the terminal strip. See Fig. B6-2.
3. The control box is attached to the backing plate
by two sheet-metal screws with large heads. See
Fig. B6-3. One of these holds the green ground
wire. Use the 5/16” socket to loosen both of
these. Remove the green ground wire from the
left-hand screw. Twist the box slightly and pull it
away from the backing plate.
4. To reassemble, reverse the procedure we have
just described. Remember to attach the green
ground wire to the inner sheet metal screw (5/16”
head).
Fig. B6-2 - Connections to low water
cutoff control
Fig. B6-3 - Control for low water cutoff with cover removed
These two screws
attach the control box
to the mounting plate.
Removing and Replacing the Low Water Cutoff Controls (cont.)
B6
cont.
A
P2 - Black with orange stripe
P1 - Brown with yellow stripe
1
2 - White