WhisperGen PPS16 Installation and Commissioning Rev: 080801
24
To set up the exhaust system:
1.
Attach the exhaust pipe to the exhaust exit at the back of the WhisperGen.
2. Make sure that the exhaust pipe will always have a slope of 10° relative to the horizon.
3. When the WhisperGen is not running, use the Bleed Air function on the control panel (or
push the start and then the stop button), to make the burner fan operate at 100%.
4. Measure the exhaust back-pressure at the condensate outlet on the back of the
WhisperGen. The back pressure should not exceed 7mm H
₂
0 with Exhaust Temp greater
than 400°C when the Air % is approximately 100%.
This is about 20mm H
₂
0 with the Exhaust Temp less than 30°C.
The following table details exhaust pipe sizes
Pipe inside
diameter
(mm)
Maximum length of straight
walled exhaust pipe
(m)
Maximum length of corrugated
walled exhaust pipe
(m)
32 4
2.5
40 6
4
45 8
6
50 10
8
11.1 Fresh water flushing of the exhaust heat exchanger
The exhaust heat exchanger is flushed with fresh water each time it is started to prevent
water soluble deposit build-up from the fuel. This is done with a spray nozzle at the top of
the exhaust heat exchanger. The flushing uses about 0.25 litre each time. It drains out
of the “Condensate Out” tube at the back of the WhisperGen.
The fresh water supply is connected to the WhisperGen Fresh Water In connection on the
back of the WhisperGen. This is a
¾
” BSPP Male connection. The fresh water shall be
at a pressure of a minimum of 1.5 bar and a maximum of 6 bar. Fresh water is normally
plumbed from the domestic pressurised fresh water supply.
Water with high concentrations of Calcium or Magnesium, (hard water), will cause the
nozzle to block. The nozzle shall be cleared regularly to ensure reliable operation.
