Table of Contents
Advertisement
WARNING: All maintenance procedures must be followed completely by competent personnel familiar with
boilers and boiler accessories.
CAUTION: Read and follow all instructions thoroughly before working on any boiler equipment.
NOTE:
Certain maintenance items concerning specific components may be found in the product literature
specifications section of this manual.
A. Daily Slowdown
The boiler and controls may be blown down at any pressure
but the blowdown lines must be piped to a safe location.
Lattner recommends blowing down at 30 psi.
1. Boiler Slowdown
Turn the boiler blowdown valve to the full open
11
position.
Watch the sight glass. Let the water drop one
11
inch in the sight glass. Approximately 10 to 12
seconds.
Shut the boiler blowdown valve.
11
2. McDonnell Miller/Water Column Slowdown
Turn the McDonnell Miller blowdown valve to
11
the full open position.
Leave the valve open for 3 to 5 seconds.
Shut the water column blowdown valve.
11
3. Auxiliary Low Water Slowdown (if applicable)
Turn the auxiliary low water column blowdown
11
valve to the full open position.
Leave the valve open for 3 to 5 seconds.
11
Shut the low water column blowdown valve.
11
B. Weekly Maintenance
1.
Check the sight glass for excessive wear or leaks.
2.
Test the McDonnell Miller and auxiliary low water
cut-off for proper operation.
blowdown valves with the boiler firing, the burners
must shut off during this test. If the burners do not
shut off,
the control may require immediate
servicing.
3.
Drain the sight glass.
4.
Visually inspect the boiler and water feed system for
any water or steam leaks in the piping.
5.
Check the vent pipe from the condensate return tank
for excessive steam loss. This would indicate bad
steam traps or check valves.
Section Ill: Maintenance
C. General Maintenance
1 , Pa g e 20)
1.
Do the following every 6 to 12 months depending
on water quality:
11
11
11
11
11
11
11
2.
Open the boiler for a complete internal inspection
at least once a year.
3.
Replace the sight glass with gaskets and washers
every six months or less if signs of wear appear.
By opening the
4.
Rebuild or replace the check valves in the water
feed line at least once a year. Always use spring
loaded check valves.
5.
Inspect the pilot burner and flame scanner for soot
or dirt accumulations.
19
(Refer to Table
Remove hand hole plate and clean inside
boiler.
Reassemble each hand hole with a new
gasket.
Clean McDonnell Miller float chamber.
Reassemble the operating mechanism with a
new head gasket.
Clean scale off the auxiliary low water cut-off
probe.
Clean the interconnecting piping between the
boiler and McDonnell Miller.
Clean the interconnecting piping between the
boiler and auxiliary low water column if
applicable.
Advertisement
Table of Contents
