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Laars MASCOT ST MSTWW User Manual

Laars MASCOT ST MSTWW User Manual

Wall-mounted, modulating gas condensing water heater
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User's Manual
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler and heater 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.
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 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 fire department.
Installation and service must be performed
by a qualified installer, service agency, or gas
supplier.
User's Manual
M
Wall-Mounted, Modulating
Gas Condensing Water Heater
Model MSTWW
199,000 BTU/hr
Natural Gas (NG) - Factory Configuration
Propane Gas (LP) - Field-Convertible
WARNING
ASCOT
®
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 inflammables 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 qualifié ou
par le fournisseur de gaz.
Document 1317
ST
AVERTISSEMENT

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Summary of Contents for Laars MASCOT ST MSTWW

  • Page 1 User’s Manual Document 1317 User’s Manual ASCOT ® Wall-Mounted, Modulating Gas Condensing Water Heater Model MSTWW 199,000 BTU/hr Natural Gas (NG) - Factory Configuration • • Propane Gas (LP) - Field-Convertible FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler and heater installation and maintenance.
  • Page 2 LAARS Heating Systems Page 2 CONTENTS Pgs - 1. Familiarizing yourself to the Laars Mascot ST ..2 2. Caring For Your Mascot ST ........2 3. Start Up and Shut Down........4 4. The Control Display and Operation ....4-7...
  • Page 3 User’s Manual - Mascot ST Water Heater Page 3 Vent Combustion Name of Component Name of Component Vent Pipe Collar Cold Water Inlet Combustion Air Intake Assembly Cold Water Inlet Filter Air Gas Mixture (AGM) Actuator Manual Power Switch Ignition Transformer DHW Temperature Sensor Igniter Water Adjustment Valve...
  • Page 4 LAARS Heating Systems Page 4 3. Shut Down and Restart Close all manual gas valves. 3.1 To Start the Mascot ST If freezing is anticipated, drain Mascot ST and be If drained, please refer to the Install and sure to also protect building piping from freezing.
  • Page 5 Mascot ST Tankless Water Heater User’s Manual - Mascot ST Water Heater Page 41 Page 5 LAARS Heating Systems Page 40 SECTION 5. Control Display and Operation 4. The Control Display and Operation 5.2 LCD Overview (continued) SECTION 5. Control Display and Operation 5.1 Control Dial and Buttons...
  • Page 6 LAARS Heating Systems LAARS Heating Systems Page 6 Page 42 5.3 Operating Mode SECTION 5. Control Display and Operation Operating Mode After the Power is turned on, and/or the Control Display is turned on , the Control Display will go through a ‘Start Up’ checklist and briefl y show a sequence of diagnostic codes before entering into the ‘Operating Mode.
  • Page 7 Mascot ST Tankless Water Heater Page 43 User’s Manual - Mascot ST Water Heater Page 7 SECTION 5. Control Display and Operation 5.4 Status Display Mode Index Parameter Description Flow 1 Current fl ow value(Li: L/m, GA: GPM) A: Li or A: GA b: Fr Fan rpm Current fan rpm value...
  • Page 8 Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 Headquarters: 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 1317...