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Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
7. Switch ON the individual section control power
switches (the control display will show system
activation).
8. Match the coding card at the burner control unit,
refer to page 100.
9. Check the function of the neutralizing system.
Note:
Neutralizing system operating instructions.
10.Check all gaskets and plugs, and retighten if
necessary.
Note:
We recommend you check all connections on
the heating water side for leaks after approximately
500 hours initial run (see page 116).
Operating the System
Service
Commissioning the system
See the neutralizing system Operating Instructions.
1. Check the heating system pressure. Permissible boiler
operating pressure: 160 psi.
2. Check the gas supply pressure. Permissible gas
pressure 4-14 “w.c. (NG) and 10-14 “w.c. (LPG).
3. Open the gas line shut-off valves.
4. Switch ON the internal power disconnect switch.
5. Switch ON the main power (breakers).
6. Switch ON system ON/OFF switch
at the control unit.
If fault indicator
on the control unit illuminates and
burner control unit display
A
flashes, first press
reset
button
R
B
on the burner control unit.
WARNING
Failure to ensure that all flue gases have been safely
vented to the outdoors can cause property damage,
severe personal injury, or loss of life. Flue gases may
contain deadly carbon monoxide.
Note:
The system can enter a fault state during
commissioning if there is insufficient gas in the
supply line (the fault indicator on the control unit
illuminates). Purge the gas supply line again and
reset the burner control unit.
Remove air from the gas line with an approved
gas purge burner or vent outdoors.
Gas type characteristics
The Vitocrossal 300 CA3 boiler is for use with gases
whose characteristics fall within the following ranges.
Natural Gas
Liquid Propane Gas
Heating value
(gross) Btu/ft
3
970 to 1100
2466 to 2542
Specific gravity
0.57 to 0.70
1.522 to 1.574
Ultimate carbon
dioxide (CO
2
) % 11.7 to 12.2
13.73 to 13.82
See the control section of the Installation
Instructions and neutralizing system
Operating
Instructions.
