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User’s Manual 

Document 1239A

H2338600A

 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 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.

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.

 AVERTISSEMENT

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.

User’s Information for

M

ASCOT

 ® 

II

Wall Mounted, 

Modulating Boiler 

Model LMH

125 MBTU/h

Combination

Boiler and Water Heater 

Model LMC

125 MBTU/h

Summary of Contents for LMC

Page 1: ...xide gas in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty AVERTISSEMENT Assurez vous de bien suivres les instructio...

Page 2: ...For Your Mascott II 3 2 Filling Shut Down and Restart 3 4 3 Digital Display and Control 5 7 To open the front panels Remove these two phillips screws and fold lower door down The middle panel will th...

Page 3: ...ion of all flue product carrying areas of the boiler and its venting system 2 Filling Shut Down and Restart 2 1 Filling the Boiler System 1 Ensure the system is fully connected Close all bleeding devi...

Page 4: ...ezing All water must be removed from heat exchanger and condensate trap or else damage from freezing may occur This step to be performed by a qualified service person 2 3 To Restart Mascot II If drain...

Page 5: ...rature units LBTHODLOD Outdoor reset enable disable enables menu items LBT Low boiler setpoint during outdoor reset HOD High outdoor temperature setpoint LOD Low outdoor temperature setpoint RMT Add U...

Page 6: ...hen there is a central heat call supplied the system pump relay is active If there is a DHW call supplied while the central heat call is active the system pump turns off This happens because of domest...

Page 7: ...er operation the LL menu should be set to LDR To set the boiler to slave SLA should be selected 3 8 3 Lead Lag Address The Lead Lag address must be set for each boiler connected to the lead lag system...

Page 8: ...mer Service Service Advisors 20 Industrial Way Rochester NH 03867 603 335 6300 Fax 603 335 3355 Applications Engineering 1869 Sismet Road Mississauga Ontario Canada L4W 1W8 905 238 0100 Fax 905 366 01...

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