Potterton Derwent Compact Plus Installation, Operation & Maintenance Manual page 17

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
DERWENT COMPACT PLUS - CONDENSING
burner manifold pressure the following procedure
should be followed:
- Loosen the screw on the burner manifold
and connect a manometer and check the
pressure available to the data in the
technical data table.
Take off the yellow governor cover.
-
- Set up the valve to achieve the figures for
high and low load.
A - Adjusting screw for full load
B - Adjusting screw for low load
C - Cover
(Adjusting Full Load)
A
B
C
(Adjusting Low Load)
Adjusting the Air
Airflow flow control (CO2 Control at high load)
The CO2 setting for full load is pre-set at the
factory. The installer has to verify the CO2
content by taking a reading in the flue between
200mm and 300mm from the top of the flue
connection. The Technical Data Table indicate
the range acceptable. The air can be re-set by
the damper on the inlet to the fan and altering the
securing positioning
Arrangement shown on the next page.
Air flow rate control at high load by device
directly on the damper. The hole position defines
SECTION 5
PAGE 15
on this damper.