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Maintenance procedures — PERIODICALLY
Perform DAILY procedures
plus the following additional
procedures . . .
Test the low water cutoff
1. Remove the boiler jacket door by rotating the two
latches on top of the boiler counterclockwise. Then
lift the jacket door up and off.
2. Locate the low water cut-off in the upper right of the
boiler (see Figure 9 at right and Figure 2, page 5).
3. Press the TEST button.
Hold the button for at
least 5 seconds
. Any shorter time will result in
an automatic reset instead of a manual reset.
4. The green STATUS light should change to red,
indicating a low water condition.
5. The SlimFit boiler’s Control will shut down the
boiler on manual reset.
6. The Control display will flash red as shown in
Figure 7, page 8.
7. Select MANUAL RESET to reset the control
8. The boiler should return to normal operation.
If the low water cutoff fails to cause a
manual reset lockout condition, immedi-
ately turn off all power to the boiler and
contact your boiler technician.
If the low water cutoff SERVICE light is
on, contact your service technician im-
mediately.
9. Replace the jacket door and rotate the two top
latches clockwise to secure in place.
DIRECT VENT installations — The
jacket door must be securely sealed. See
the WARNING on page 12.
Check Control date and time
1. Check the time shown on the Control display (see
Figure 3, page 6).
2. If time is incorrect, set the correct date and time as
shown in Figure 3, page 6.
Figure 9 Low water cutoff
Part number 550-100-560/0321
14
SlimFit
®
Series 3
gas-fired water boiler
— User’s Information Manual
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