Select Gas Type; Convert Fuel Type To Lpg - Viessmann Vitocrossal 300 Series Service Instructions Manual

Vitocrossal 300 CU3A 26 to 199 Service

Select Gas Type

Heating value (gross)
Specific gravity
Ultimate carbon dioxide (CO

Convert Fuel Type to LPG

Btu/ft 3
) %
2
Note: the Vitocrossal 300 CU3A boiler is factory set to
operate with natural gas . See following subsection
for conversion instructions to liquid propane gas.
1. Ensure that the fuel type listed on the boiler rating
plate is the correct type for the installation being
attempted.
2. Record fuel type in Maintenance Record on page 113.
The Vitocrossal 300 CU3A boiler is for use with gases
whose characteristics fall within the following ranges.
Do not use any other types of gas.
Natural gas
970 to 1100
0.57 to 0.70
11.7 to 12.2
Gas type conversion
1. Set adjusting screw A on the gas valve to "2".
2. Turn ON/OFF switch "8" ON.
3. Select the gas type in coding address "82".
- Call up code 2.
- "General"
- In coding address "11", select value "9".
- In coding address "82", select value "1" (LPG
operation).
- Set code "11" value unequal "9".
- End service functions.
4. Open the gas shut-off valve
5. Affix fuel conversion label supplied with the fuel
conversion kit as shown in the fuel conversion kit
instructions.
Start-up
Liquid propane gas
2466 to 2542
1.522 to 1.574
13.73 to 13.82
17