Commissioning - Worcester ZWBR 7-28 HE plus Installation And Servicing Instructions

Wall mounted condensing boiler for central heating and mains fed domestic hot water
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5

Commissioning

61
136
365
364
135
295
170
nn
.
171
Fig. 29
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
171
Hot water
172
Gas cock (shown in off position)
173
Cold water service cock
295
Appliance type sticker
310
Temperature control for hot water
317
Multifunction display
358
Condensation trap
363
Indicator lamp for burner
364
Indicator lamp for power supply
365
"Chimney sweep" button
366
Service button
367
ECO button
400
Textdisplay
6 720 610 597 GB (01.07)
27
317 366 367
ECO
363
310
E
172
173
358
400
170
6 720 610 597 - 05.1O
5.1
Commissioning
Never run the appliance when empty or
unpressurised.
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 pressure relief valve.
Suitable flushing agents and inhibitors are available
from Betz/Dearborn Tel.: 0151 4209563 and Fernox
Tel.: 01799 550811. Instructions for use are supplied
with the these products.
y Before commissioning, the gas supply pressure must
be tested (see page 34).
Commissioning
8.1
15
23

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