LAARS Mascot LX MLXC 175 MBH - Install and Operating Manual - Manual (Page 46)

LAARS Heating Systems Page 42
SECTION 11.
Maintenance
WARNING
Disconnect all power to the appliance before
attempting any service to the appliance. Contact with
electricity can result in severe injury or death.
11.1 System Maintenance
(yearly, unless otherwise noted)
1. If a strainer is employed in a pressure reducing
valve or the piping, clean it every six months.
2. Inspect the venting system for obstruction or
leakage at least once a year. Periodically clean the
screens in the vent terminal and combustion air
terminal (when used).
3. Keep the appliance area clear and free from
combustible materials, gasoline, and other
flammable vapors and liquids.
4. If the appliance is not going to be used for extended
periods in locations where freezing normally
occurs, it should be isolated from the system and
completely drained of all water.
5. Low water cutoffs, if installed, should be checked
every year. Float type low water cutoffs should be
flushed periodically.
6. Inspect and clean the condensate collection system
yearly.
7. When a means is provided to neutralize condensate,
ensure that the condensate is being neutralized
properly.
8. Removal of burner and inspection of combustion
coil and flue passages is required at least once a
year. Clean with a soft bristle brush / vacuum or
wash with water if necessary. Sooting and buildup
on the coils is an indication of improper set up and
poor combustion. Determine the cause and make
corrections.
9. Inspect the vent system and air intake system, and
ensure that all joints are sealed properly. If joints
need to be resealed, completely remove existing
Garlock sealing material, and clean with alcohol.
Apply new sealing material, and reassemble.
11.2 Appliance Maintenance and
Component Description
Use only genuine LAARS replacement parts.
Mascot LX gas and electric controls are engineered for
long life and dependable operation, but the safety of
equipment depends on their proper functioning. Only
a qualified service technician should inspect the basic
items listed below every year:
a. Appliance control f. Flow switch
b. Automatic gas valve g. Low water cutoff
c. Pressure switches h. Burner
d. Blower i. Heat exchanger
e. Pump
11.2.1 Burner
Check the burner for debris. Remove the blower
assembly to access the burner. Remove the 4 bolts
connecting the blower Pull burner up and out. Clean
burner, if necessary, by blowing compressed air from
the outside of the burner into the center of the burner,
and wipe the inside of the burner clean with glass
cleaner. A dirty burner may be an indication of improper
combustion or dirty combustion air. Determine the
cause, and correct. If damaged, replace the burner gasket
when replacing the burner.
NOTE: When installing the burner, make sure the flange
is aligned with the mating surface, as each is keyed to
control fit.
11.2.2 Appliance Control
Mascot LX has an integrated control that incorporates
manual reset high limit control, operating temperature
control, modulating control, ignition control, outdoor
reset control, pump control and many other features. If
any of these features are thought to be defective, please
consult the factory for proper trouble shooting practices
prior to replacing the control. If control replacement is
required, turn off all power to the appliance and shut off
all manual gas valves to the appliance. Remove the front
door to the appliance and the control panel plastic bezel.
Remove all wire connections from the control board.
The control board connections are keyed to only allow
connection in the proper location, but proper handling
techniques should be used to avoid damage to the
wiring or connectors. To remove the control push in on
the two tabs on the left side of the board to unlatch the
clips from the control panel. Rotate the control around
ATTENTION
Au moment de l'entretien des commandes, étiquetez
tous les fils savant de les débrancher. Les erreurs de
câblage peuvent nuire au bon fonctionnement et être
dangereuses. S'assurer que l'appareil fonctionne
adéquatement une fois l'entretien terminé.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.