LAARS Heating Systems
Page 30
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.
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
b. Ignitor
c. Water temperature control
d. Automatic gas valve
e. Pressure switches and tubing
f.
Blower
g. High limit
6.7 Shutting Down the Mighty Therm2
1. Switch off the main electrical disconnect switch.
2. Close all manual gas valves.
3. If freezing is anticipated, drain the Mighty
Therm2 and be sure to also protect building
piping from freezing.
This step to be performed by a qualified
service person.
6.8 To Restart the Mighty Therm2
If drained, follow
Section 6.1
in this manual for
proper filling and purging.
1. Switch off the main electrical disconnect switch.
2. Close all manual gas valves.
3. WAIT FIVE (5) MINUTES.
4. Set the aquastat or thermostat to its lowest
setting.
5. Open all manual gas valves.
6. Reset all safety switches (pressure switch, manual
reset high limit, etc.).
7. Set the temperature controller to the desired
temperature setting and switch on electrical
power.
8. Burner will go through a pre-purge period and
ignitor warm-up period, followed by ignition.
