andrews R18 Series, Technical Documentation Manual

Page: 47 / 71

18IP22B
39
6.3 Live run check
Liquid Propane Gas
Gas service pressure 50 mbar
Nozzle diameter 1 mm
minimum load (20 %)
Type Burner Pilot Air damper
pressure pressure opening
start/min. closed
(mbar) (mbar) (mm)
132 7 11 11
154 7 11 11
180 7 11 11
210 7 11 11
244 7 11 11
280 7 11 11
full load (100 %)
Type Burner Pilot Air damper
pressure pressure opening
open
(mbar) (mbar) (mm)
maximum
132 46 11 125
154 46 11 125
180 46 11 125
210 46 11 125
244 46 11 125
280 46 11 125
Table 15b Burner pressure Propane
a. Disconnect the electrical connections to the 1st and 2nd
safety shut off valves by removing the plug from the front
electrical tray.
Open the gas service cock and pilot manual cock and with
the control thermostat on a high setting turn on the electri-
cal supply and the on/off switch on the front control panel.
Check that the combustion air inlet damper cycles to the
fully open position and back before ignition of the pilot
burner commences.
Using the sight glass at the lower right hand side of the
water heater check that the ignition electrode ignites the
pilot burner and that the pilot burner is stable in operation.
(It may be necessary to purge the ignition system if there
is air in the gas supply; although seven minutes must be
allowed between each attempt to ensure that any gas has
been dispersed from the combustion chamber).
Press reset button to override water heater lockout.