Commissioning - Worcester benchmark ZWB 7-25 R 25 HE Design, Installation And Servicing Instructions

5

Commissioning

136 365
364
135
295
Fig. 30
8.1 Pressure gauge
15 Safety valve
27 Automatic vent
61 Reset button
135 Master switch
136 Temperature control for central heating
170 Service cocks on CH flow and return
Hot water
171
172 Gas cock (shown in on position)
Cold water service cock
173
Appliance type sticker
295
310 Temperature control for hot water
Multi function display
317
Condensate trap
358
363 Indicator lamp for burner
Indicator lamp for power supply
364
365 "Chimney sweep" button
366 Service button
ECO button
367
Instructions for use are supplied with the these
6 720 611 441 GB (03.11)
27
61
317 366 367
ECO
E
170
171
172
358
363
310
173 170
5.1 Commissioning
Never run the appliance when empty or
unpressurised.
The operational CO
i
tory and no adjustment is necessary when
installing a natural gas fired appliance.
Benchmark Water Treatment: For optimum perform-
ance after installation, this boiler and its associated cen-
tral heating system should be flushed in accordance
with the guidelines given in BS7593:1992 - Treatment
of water in domestic hot water systems. Full instructions
are supplied with proprietary cleansers sold for this pur-
pose. If an inhibitor is to be used after flushing, it should
be used in accordance with the inhibitor manufacturers
instructions.
To drain the appliance shut the system valves and open
the system drain point.
Suitable flushing agents and inhibitors are available
from Betz/Dearborn Tel.: 0151 4209563, Fernox Tel.:
01799 550811 and Salamander Tel.: 0121 378 0952.
products.
Commissioning
8.1
15
6 720 610 599-04.2O
level is set at the fac-
2
23