Buderus GB142-24, GB142-60, GB142-30, GB142-45, Logamax plus GB142-24 Instruction

Propane Conversion Kit
Instruction

Required Input Rates

GB142-24
84,800 btu/hr

Tab. 1

This kit and instructions are for converting the GB142 model boilers
from Natural Gas to Liquid Propane.

WARNING!

This conversion kit shall be installed by a qualified service agency in
accordance with the manufacturer's instructions and all applicable
codes and requirements of the authority having jurisdiction.
The information in these instructions must be followed to minimize
the risk of fire or explosion or to prevent property damage, personal
injury or death. The qualified service agency is responsible for the
proper installation of this kit.
The installation is not proper and complete until the operation of the
converted boiler is checked as specified in the manufacturer’s
instructions supplied with the kit.

GB142-30
106,000 btu/hr

Condensing gas boiler

GB142-45
149,000 btu/hr

GB142-60
214,800 btu/hr

Logamax plus

GB142-24/30/45/60

Tab. 2

CAUTION!

The gas supply shall be shut off prior to disconnecting the electrical
power, before proceeding with the conversion.

7215 0100 (2011/11) US/CA

C

Contents

Contents

1 Safety considerations . . . . . . . . . . . . . . . . . . . . . 3

1.1 Application purpose . . . . . . . . . . . . . . . . . 3

1.2 Hazard definitions . . . . . . . . . . . . . . . . . . . 3

2 Parts list for converting the boiler to propane . 4

3 LP conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Testing for gas leaks . . . . . . . . . . . . . . . . . 6

3.2 Inlet gas pressure . . . . . . . . . . . . . . . . . . . 7

3.3 Checking and adjusting the gas/air ratio . 7

3.4 Carrying out a tightness test in operating

conditions . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Measuring the carbon monoxide content

(CO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.6 Lighting Instructions . . . . . . . . . . . . . . . . . 9

4 Operating Instructions . . . . . . . . . . . . . . . . . . . 10

2

Logamax plus GB142-24/30/45/60 – 7215 0100 (2011/11)

1 Safety considerations

Safety considerations

1

For use in Canada the conversion kit shall be carried out
in accordance with the requirements of the provincial
authorities having jurisdiction and in accordance with the
requirements of the CAN-B149.1 and CAN1-B149.2
Installation Code. See also E.I.V.
Please observe the following safety instructions.

1.1 Application purpose

This kit and instructions are for converting the
GB142-24/30/45/60 from Natural gas to Liquid
Propane.

1.2 Hazard definitions

The following defined terms are used throughout the
documentation to bring attention to the presence of
hazards of various risk levels. Notices give important
information concerning the operation of the product.

DANGER:

Indicates the presence of hazards that will
cause severe personal injury, death or
substantial property damage.

WARNING:

Indicates the presence of hazards that can
cause severe personal injury, death or
substantial property damage.

DANGER:

due to explosion of gas.

B Work only on gas components when you

have a license to do so.

B Note that the assembly of gas and vent

connections, the initial start-up, the
electrical connections, the maintenance
and service can only be performed by a
licensed service contractor or technician.

DANGER:

due to electricity.

B Prior to doing any work on the heating

system, disconnect all electrical power to
the appliance at the emergency switch.

B It is NOT sufficient to shut off only the

appliance control!

NOTICE
All service work on gas components must be

performed by a trained and qualified service
technician.

CAUTION:

Indicates presence of hazards that will or
cause minor personal injury or property
damage.

CAUTION:

Risk of electric shock.

Indicates presence of hazards due to electric
shock.

NOTICE
Indicates special instructions on installation,

operation or maintenance that are important
but not related to personal injury or property
damage.

Logamax plus GB142-24/30/45/60 – 7215 0100 (2011/11)

3

2

Parts list for converting the boiler to propane

2 Parts list for converting the boiler to propane

Conversion kit propane for the 24/30 kW # 76687
includes:

• orifice # 7099016 (dia. 3.35 mm / 0.131 inch)

•2 o-rings

•bag

• these instructions

• label to be filled out and affixed to the boiler.

Conversion kit propane for the 45 kW # 76688 includes:

• orifice # 7099935 (dia. 4.05 mm / 0.158 inch)

•2 o-rings

•bag

• these instructions

• label to be filled out and affixed to the boiler.

Conversion kit propane for the 60 kW # 7746900156
includes:

• orifice # 76690 (dia. 5.40 mm / 0.213 inch)

•2 o-rings

•bag

• these instructions

• label to be filled out and affixed to the boiler

• diffuser plate.

4

Logamax plus GB142-24/30/45/60 – 7215 0100 (2011/11)