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5.   Inspect the venting system for obstruction, leakage 

or corrosion at least once a year.

 

6.   Keep the boiler area clear and free from combustible 

materials, gasoline, and other flammable vapors and 

liquids.

 

7.   Be sure that all combustion air and ventilation 

openings are unobstructed.

 

8.   The JX has easy access through the top cover 

and the flue collector for inspection of the heat 

exchanger.   It is critical to ensure that the flue 

collector sits in the proper position so that no flue 

products will escape into the living area of the 

building.

 

9.   If the boiler is not going to be used for long periods 

of time in locations where freezing occurs, it should 

be completely drained of all water. To accomplish 

this, there is a drain valve on the right side of the 

boiler which can be opened. This will drain the right 

side of the boiler. There are two plugs located on 

the left side of the heater which can be accessed by 

removing the side panel which must be removed to 

drain that side. Both sides must be drained.  

 

For complete details on Maintenance and 

Troubleshooting for this boiler, please refer to 

the Installation and Operating Manual, available 

online at the manufacturer's website. 

Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.

 

WARNING

The Warranty does not cover damage caused by 

lack of required maintenance, lack of water flow, 

or improper operating practices.

 

 

AVERTISSEMENT

 

La garantie ne couvre pas les dommages causés 

par l'absence d'entretien, absence de débit d'eau, 

ou pratiques de fonctionnement irrégulières

 

WARNING

Installation, maintenance, and service must be 

performed by a qualified installer, service agency, or 

gas supplier.

 

 

AVERTISSEMENT

 

L’installation, etretian, et l’entretien doivent être 

assurés par un installateur ou un service d’entretien 

qualifié ou par le fournisseur de gaz.

H241

1300-

Customer Service and Product Support:  

800.900.9276 • Fax 800.559.1583

Headquarters: 

20

 Industrial Way, Rochester, NH, USA  03867  • 603.335.6300  • Fax 603.335.3355

9 Brigden Gate, Halton Hills, Ontario, Canada L7G 0A3 • 905.203.0600 • Fax 905.636.0666

www.Laars.com

                           Litho in U.S.A. © Laars Heating Systems 20-12      Document 1479

For LAARS Product  

and Service V

IDEOS

All Manuals (Install & 

Operate, Start Up, and 

Service Manuals) can 

be downloaded at 

https://www.youtube.

com/user/LaarsHeating

www.laars.com 

M

INI-

T

HERM  

JX

 

 Residential Boilers

®

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