Bosch Worcester Greenstar Utility 32/50 - Central Heating; Combustion and Burner Settings; Burner Settings

Commissioning
Greenstar Utility
ErP -
6 720 821 751 (2018/04)30
▶ Replace the bleed/oil pressure port blanking plug (refer to figure 39
item [1]).
▶ Check and rectify any oil leaks.
5. Switch on the oil supply.
▶ Switch on the electrical supply.
▶ Restart the appliance and run for 5 minutes.
▶ Recheck the CO
2
levels and if required, adjust the air damper setting
to obtain the correct CO
2
level.
▶ Repeat the fine tuning procedure if required.
▶ Refit the sample point cap, hand tighten only do not over tighten
(refer to figure 41 item [1]).
6.4.6 Central heating
1. Open all radiator valves.
▶ Set room thermostat to maximum.
▶ Set programmer to ON for CH & DHW (if applicable).
▶ Turn the appliance control thermostat [A] to max.
The burner should be ON with the circulating pump.
▶ Ensure all radiators are heating up evenly and balance the system to
the temperature difference required for the heating flow and return
according to the heating load.
Fig. 42
2. Set the room thermostat to minimum. The burner and circulating
pump should be off.
3. Check that any other controls that are fitted to the system are
operating properly.
6.5 Combustion and burner settings
6.5.1 Burner settings
32/50 appliances burner settings information
50/70 appliances burner settings information
6 720 813 304-37.1TL
APPLIANCE MUST BE SET TO CO
2
LEVELS.
AIR SETTINGS GIVEN ARE APPROXIMATE ONLY, AS
FLUE LENGTH AND NOZZLE VARIATIONS WILL
AFFECT THIS.
Description Unit Values
Output (appliance) kW 32 41 50
Nozzle (gph) 0.85 1.10 1.25
Nozzle (spray angle) 60° 60° 60°
Nozzle (type) ES S S
Oil pump Pressure p.s.i. 150 145 150
bar 10.5 10.0 10.5
Fuel flow rate Kg/h 2.76 3.53 4.33
l/h 3.52 4.33 5.48
Approx, flue gas temperature °C 70 82 89
CO
2
content % 12.0 12.5 12.5
Approximate air setting 4.75 4.50 5.75
Air damper disc setting BDN/A
Combustion head setting mm 14.0 17.0 21.0
Burner head BX + Recirculation tube
Table 13 32/50 appliances burner information
Description Unit Values
Output (appliance) kW 50 60 70
Nozzle (gph) 1.25 1.50 2.00
Nozzle (spray angle) 45° 45° 45°
Nozzle (type) HHS
Oil pump Pressure p.s.i. 145 136 133
bar 10.0 9.4 9.2
Fuel flow rate Kg/h 4.33 5.17 6.03
l/h 5.48 6.58 7.66
Approx. flue gas temperature °C 76 85 91
CO
2
content % 12.5 12.5 12.5
Approximate air setting 2.25 3.75 6.50
Air damper disc setting N/A N/A N/A
Combustion head setting notch 034
Burner head BT
Table 14 50/70 appliances burner information