LAARS PH Mighty Therm User Manual
- June 4, 2024
- LAARS
Table of Contents
LAARS PH Mighty Therm User Manual
FOR YOUR SAFETY:
This product must be installed and serviced by a professional service technician, qualified in hot water boiler installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death. Improper installation and/or operation will void the warranty. For indoor installations, as an additional measure of safety, Laars strongly recommends installation of suitable Carbon Monoxide detectors in the vicinity of this appliance and in any adjacent occupied spaces.
WARNING
If the information in this manual is not followed exactly, a fire or
explosion may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable 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
- 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
- If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency, or gas supplier.
A. General Care
Your MightyTherm will require very little Mainte- nance. However, as with any
fine appliance there are certain steps that should be taken to ensure continu-
ing optimum performance.
Keep the area around the MightyTherm clean and free from combustible
materials, gasoline and other flammable liquids and vapors.
The MightyTherm must be completely isolated and protected from any source of
corrosive chemical fumes such as trichlorethylene, perchlorethylene, chlorine,
etc.
Keep grille openings on the boiler free for properventilation of interior
components.Do not obstruct or block a free flow 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 flammable cleaning materials.
If sidewall vented, keep the vent terminal clear of obstructions — do not pile
snow against the vent terminal. Clean the air filter(s) often, and then
develop an appropriate maintenance schedule.
B. 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
qualified service person.
Maintenance:
- Lubricate the water circulating pump perinstructions found on the pump.
- If a strainer is employed in a pressure reducingvalve or in piping, clean it every six months.
- At start-up and every six months thereafter, themain burner flame should be observed for proper performance (See Figure 1). If flame has
appearance of “sooting” tips, check for debris nearorifices. Call serviceperson. See lighting and shutdown instructions attached for proper pilot flamepattern.
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Inspect the venting system for obstruction, leakageand corrosion at least once each year.
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Keep boiler area clear and free from combustible material, gasoline and other flammable vapors andliquids.
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Be certain all combustion air and ventilationopenings are unobstructed
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Check for fouling on the external surfaces of theheat exchanger every six months.
Note: After installation and first start-up, check the heatexchanger for fouling after the following periods ofoperation:24 hours 7days 30days 90 days
Then once every six months thereafter.
Fouling on the external surfaces of the heat exchangeris caused by incomplete combustion and is a sign ofcombustion air and/or venting problems. As soon asany fouling is observed, the cause of the fouling shouldbe corrected. The heat exchanger can be checked witha flashlight and locating a mirror under the burners. Analternate method is to remove the venting and toppanel as necessary to inspect from above. Also checkthe vent system for defects at this time.a. If cleaning is required, shut off all electrical andgas supply to the heater.
b. To expose the heat exchanger:Indoor Models:Remove flue pipe, top of unit, rear upper jacket, fluecollector rear panel and heat exchanger baffles.Outdoor Models:Remove vent top assembly, rear upper jacket, flue
collector rear p -
Remove all burners: It is usually more convenient to remove the burner tray assembly. Disconnect sensor wire, ignition cable (or thermocouple generator) and pilot gas line. Disconnect manifold inlet union(s).
Remove the four (4) retaining screws. Grasp burner/pilot assembly firmly at the front.. Push it back, disengaging it from the gas orifice. Lower the front of the burner (to avoid damaging pilot shield) then remove the burner tray.
Caution
Black carbon or green soot on a dirty heat exchanger can, under certain conditions, be ignited by a random spark or open flame. To prevent this unlikely occurrence, dampen the soot deposits with wet brush or fine water spray before servicing or cleaning the heat exchanger.
With a wire brush, remove soot and loose scale from heat exchanger. Do not use
water or compressed air for cleaning. Clean fallen debris from bottom of
heater. Check that burner ports are clear and pilot assembly is free of
debris.
d. Reassemble in reverse order: Be sure the heat exchanger baffles are
replaced.
The gas and electric controls installed on boilers are designed for both
dependable operation and long life, but the safety of this equipment so
completely depends on their proper functioning that it is strongly recommended
that the basic items be checked by a competent serviceperson every year and
replaced when necessary. The basic controls are:
a. Water temperature controls
b. Pilot safety system
c. Automatic electric gas valve(s)
d. Flow sensing safety device.
Low water cutoffs should be inspected every six months, including flushing of
float types.
NOTE: Warranty does not cover any damage caused by lack of required
maintenance or improper operating practices.
10. Both modulating and stage valves are adjusted at the factory for minimum
permissible rates and should not be readjusted.
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