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Page 10
10. In the control compartment, find the manual reset
high-limit switch box (see Figure 15) and loosen
the screw on the top to remove the cover.
11. Loosen the screw that fastens the white wire and
remove it from the terminal. Pull it out through
the top of the case and separate the other white
wire from the red wire coming from the fuse
2-Stage/
Operating
Controller
Header
Figure 17. Sensory bulb locations.
Retaining
Clip
Figure 18. Retaining clip removal.
3.1 in.
(79mm)
Attach Capillary
Covers on
Left Side
LEFT
Figure 19. Hole location, left side.
Inlet
Oulet
High Limit
Modulating (if installed)
2.4 in.
0.9 in. dia
(61mm)
(23mm)
(Two holes)
FRONT
2.4 in.
(61mm)
1.9 in.
(48mm)
holder. Gently pull the two white wires out of the
control compartment and coil them on top of the
heat exchanger.
12.
A temperature control sensing bulb is located
in the front of the header on the inlet side and a
manual reset hi-limit sensing bulb is located on
the back side of the header on the outlet side (see
Figure 17). Remove these sensing bulbs from the
header. The following steps for removal apply to
all sensing bulbs:
a. If there is more than one capillary tube coming
out of the header, label the capillary tubes.
b. Loosen the screw on the capillary tube
retaining clip, then gently pry the clip apart
until it comes free from the temperature
control (see Figure 18).
c. Pull the sensing bulbs out of the temperature
control.
d. Gently pull the capillary tubes into the control
compartment.
e. Pull the temperature sensing bulb out of the
header, and temporarily route it to the front of
the heater.
13. Use a pair of diagonal cutters to cut the plastic
tie around the wire bundle in the control
compartment.
14. On the terminal strip, disconnect the two brown
wires from No. 5 and No. 6 terminals.
15. Remove the flow switch conduit retaining clip
and the elbow leading into the jacket.
16. Reach inside the control compartment and
release the retaining nut in the upper right corner.
The nut should only be finger-tight.
17. When the conduit is pulled away from the jacket,
pull the two brown wires out of the control
compartment. Coil the conduit and wires on top
of the heat exchanger.
18. Use a chassis punch to put two 7/8 inch (22
mm) holes in the front left side of the jacket (see
Figure 19).
19. Remove the front and rear tile covers (see
Figure 15).
20. Lift out the heat exchanger assembly, turn it 180
degrees, and reseat the unit in the heater with the
water connections on the left side.
21. Reinstall the front and rear tile covers.
22. Push the capillary tube(s) out through the lower
hole in the left side of the jacket.
23. Install the sensing bulb(s) into the appropriate
temperature control (keep in mind that the
positions of the inlet and outlet have been
reversed. The inlet is now behind the outlet).
BRADFORD WHITE
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