Preparing the appliance for operation | 11
6720872363 (2017/04)
Greenstar combi 100 p / 151 p
2.3 Overview of boiler types
Table 2 Appliance types
Z Central heating appliance
W DHW heating
B Condensing technology
28 Output and DHW output up to 95,500 BTU/hr (28 kW)
42 Output and DHW output up to 143,300 BTU/hr (42 kW)
-3 Version
A Fan-supported appliance
23 Natural gas (NG)
3 Preparing the appliance for operation
▶ If existing, open the heating supply valve and the heating return valve.
▶ If existing, open the cold water valve and the DHW valve.
▶ Open the gas cock.
▶ Open the control panel cover.
3.1 Checking the boiler water pressure
The standard boiler water pressure is 14.5 - 21.75 psi (1 - 1.5 bar).
Should a higher boiler water pressure be required, refer to a trained and certified
heating contractor.
ZWB28-3 A 23 Greenstar combi 100 p
ZWB42-3 A 23 Greenstar combi 151 p