LAARS Mascot ll LMC User Manual
User’s Manual Document 1239A
User’s Information for
®
MASCOT
II
Wall Mounted,
Modulating Boiler
Model LMH
125 MBTU/h
Combination
Boiler and Water Heater
Model LMC
125 MBTU/h
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualied in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in ue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
WARNING
If the information in this manual is not
followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
ammable vapors and liquids in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the re department.
Installation and service must be performed
by a qualied installer, service agency, or gas
supplier.
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dansle bâtiment où vous êtes.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualié ou
par le fournisseur de gaz.
AVERTISSEMENT
H2338600A
Page 2
LAARS Heating Systems
CONTENTS
Familiarizing yourself to the Laars Mascot II ................2
1. Caring For Your Mascot II
2. Filling, Shut Down and Restart
3. Digital Display and Control ....................................5-7
......................................... 3
...............................3-4
FAMILIARIZING YOURSELF TO THE
MASCOT
®
II
To open the front panels. Remove these two phillips screws, and
fold lower door down. The middle panel will then also fold down.
This will reveal the two screws that hold the upper panel in place.
Figure 2. Location of Components.
User’s Manual - Mascot II Boilers and Water Heaters
Page 3
1. Caring For Your Mascot II
Your Mascot II will require very little
maintenance. However, as with any ne appliance
there are certain steps that should be taken to ensure
continuing optimum performance.
1.1 General Care
Keep the area around the Mascot II clean and
free from combustible materials, gasoline and other
ammable liquids and vapors.
The Mascot II must be completely isolated and
protected from any source of corrosive chemical fumes
such as trichlorethylene, perchlorethylene, chlorine,
etc.
Keep bottom and top openings on the boiler free
for proper ventilation of interior components.
Do not obstruct or block a free ow of air to the
boiler to ensure proper ventilation.
If desired, clean the jacket surfaces with a damp
cloth and mild detergent. Do not use ammable
cleaning materials.
If sidewall vented, keep the vent terminal clear
of obstructions — do not pile snow against the vent
terminal. Clean the intake screen often, and then
develop an appropriate maintenance schedule.
1.2 Annual Inspection of Flue and Vents
Visually inspect the vent pipe once a year. Should
any deterioration exist, have the affected parts replaced
by a qualied service person.
2. Filling, Shut Down and Restart
2.1 Filling the Boiler System
1. Ensure the system is fully connected. Close all
bleeding devices and open make-up water valve.
Allow system to ll slowly.
2. Move manual lever on 3-way valve actuator to
“open” position, allowing air to purge from boiler
loop. Valve is normally in DHW position until
there is a call for Central Heat via “T-T” contacts.
3. If a water pressure regulator is provided on the
make-up water line, adjust the pressure regulator
to provide at least 12 psi (81.8 kPa) at the highest
point in the heating loop.
4. Open bleeding devices on all radiation units at the
high points in the piping throughout the system,
unless automatic air bleeders are provided at such
points.
Note that there is an air bleed located on the left
side of Mascot II, on top of the jacket.
5. Cycle the boiler pump on and off 10 times, 10
seconds on and 10 seconds off to remove all air
from the heat exchanger. Then run system and
appliance pump for a minimum of 30 minutes with
the gas shut off.
6. Using manual lever located on left side of 3-way
valve actuator, move from “open” position back to
closed position repeatedly. This process forces air
out of the internal DHW loop.
1.3 In the Event of a Power Failure
The Mascot II can not be operated during
an electrical power outage. If there is an extended
power outage with danger from freezing, then the
Mascot II (and all other water systems) should be
drained completely. When draining the boiler, turn
off main electrical disconnect switch. When placing
back in service, refer to Section 2 of this Manual for
instruction. All draining and lling must only be done
by a qualied service person.
1.4 Full Service Every Three (3) Years
In addition to the annual visual inspections, a
qualied service agency should conduct a detailed
inspection of all ue product carrying areas of the
boiler and its venting system.
WARNING
Failure to remove all air from the heat exchanger could
lead to property damage, severe injury or death.
7. Recheck all air bleeders as described in Step 4.
8. Shut down the entire system and vent all radiation
units and high points in the system piping, as
described in Step 4.
9. Close make-up water valve and check strainer in
pressure reducing valve for sediment or debris from
the make-up water line. Reopen make-up water
valve.
10. Check gauge for correct water pressure and then
the system is ready for operation.
11. Refer to local codes and the make-up water valve
manufacturer’s instructions as to whether the
make-up water valve should be left open or closed.
12. After placing the unit in operation, the ignition
system safety shutoff device must be tested.
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