LAARS Pennant PNCV - Install and Operating Manual - Manual (Page 32)

LAARS Heating Systems Page 32
SECTION 7.
Maintenance
7.1 System Maintenance
1. Lubricate the system water-circulating pump, if
required, per the instructions on the pump.
2. If a strainer is employed in a pressure reducing
valve or the piping, clean it every six months.
3. 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).
4. Keep the appliance area clear and free from
combustible materials, gasoline, and other
flammable vapors and liquids.
5. 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. All
systems connected to it should also be drained or
protected from freezing.
6. Low water cutoffs, if installed, should be
checked every 6 months. Float type low water
cutoff should be flushed periodically.
7. Inspect flue passages, and clean with brushes/
vacuums, if necessary. Sooting in flue passages
indicates improper combustion. Determine the
cause and correct.
8. Inspect the vent system and air intake system,
and if the vent system is Category III, ensure
that all joints are sealed properly. If joints need
to be resealed, follow venting manufacturer's
instructions to clean and reseal vent system.
7.2 Appliance Maintenance and
Component Description
Only genuine Laars replacement parts should be used.
Caution
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
Attention
Lors d’entretien ou de réparation des commandes,
étiquetez tous les câbles avant de les déconnecter.
Des erreurs de câblage peuvent provoquer des
fonctionnements incorrects et dangereux. Après
toute intervention d’entretien ou de réparation,
vérifier que l’appareil fonctionne correctement.
See Figures 17 and 18 for locations of gas train
and control components.
The gas and electric controls on the appliance
are engineered for long life and dependable operation,
but the safety of the equipment depends on their
proper functioning. It is strongly recommended that
a qualified service technician inspect the basic items
listed below every year.
a. Ignition control g. High limit
b. Ignitor h. Pump
c. Water temp. control i. Low water cutoff
d. Automatic gas valve j. Relays
e. Pressure switches k. Flow switch
and tubing l. Gas train
f. Blower m. Control components
7.2.1 Burners
Close main manual gas valve before proceeding.
Checking the burners for debris - Remove the ignitor
inspection panels(s) and ignitor(s) and inspect the
burners through the ignitor hole(s) using a flashlight
to illuminate. If there is any indication of debris on
the burners that are visible, all the burners will need
to be inspected more thoroughly. Remove the screws
from around the front of the air box (large panel from
which the ignitor inspection panel(s) were removed),
and remove the large panel. Remove the gas manifold
assemblies and the burner panels. Inspect the burners.
Clean burners, if necessary, by blowing compressed
air from the outside of the burners into the center
of the burner. A dirty burner may be an indication
of improper combustion or dirty combustion air.
Determine the cause, and correct. Replace the burners
in the reverse order
Figure 17. Gas Train Components.