Installation Instructions
Installation Manual
Page
20
-GAS SUPPLY AND GAS PIPE SIZING-
• Check that the type of gas matches the rating plate rst.
• Ensure that any and all gas regulators used are operating properly and
providing gas pressures within the specied range shown below. Excess
gas inlet pressure may cause serious accidents.
• Conversion of this micro-boiler from natural to propane of vice versa will
void all warranty. Contact your local distributor to get the correct unit for
your gas type. The manufacturer is not liable for any property and/or per-
sonal damage resulting from gas conversion.
• INSTALLATION OF THIS GAS BOILER IS ONLY TO BE PERFORMED
BY A LICENSED PROFESSIONAL.
-General-
-Regulators-
The gas pressure delivered to this unit and other gas appliances needs to be constant and at the
correct pressure. Regardless of what type of gas you have, the supply gas pressure can change.
Depending on temperature LP (Liquid Propane) gas pressure inside a storage tank may be as low as
10psi in the cold of winter or as high as 200psi in the heat of summer. NG (Natural Gas) gas pressures
can also very greatly depending on the geographic region, season, time of day and other reasons. The
gas regulator must keep gas owing to the boiler at a constant pressure even as the gas supply (LP
storage tanks or NG gas mains) and the number of appliances consuming gas changes (as devices
turn on and off in the home).
• The minimum and maximum inlet gas pressures are:
• Inlet gas pressures that fall outside the range of values listed above may adversely affect the per-
formance of the micro-boiler. These pressures are measured when the micro-boiler is in full opera-
tion.
• Inlet gas pressure must not exceed the above maximum values; gas pressure above the specied
range will cause dangerous operating conditions and damage to the micro-boiler.
Gas type Inlet gas pressures
Natural Gas Min. 5.0” W.C. (1.24 kPa) - Max. 10.5” W.C. (2.61 kPa)
Propane Min. 8.0” W.C. (1.99 kPa) - Max. 14” W.C. (3.48 kPa)
Installation - Gas
CAUTION