andrews CWH 30/201, Operating Instructions Manual

Page: 45 / 48

Engineer 45 MAXXfl o EVO
4.5 COMPLETE PARAMETER LIST TABLE (CONTINUED)
PARAMETER DESCRIPTION FACTORY
DEFAULT
NOTES
Burner control
9500 Prepurge time 15s The length of time to purge the fl ue system on startup of
the burner can be increased up to 51 seconds if required
9501 Prepurge time min 15s Minimum possible pre-purge time, beyond which it is not
possible to reduce parameter 9500
9512 Required speed at ignition 30kW = 2500rpm
60kW = 3500rpm
90kW = 2500rpm
120kW = 3500rpm
Fan speed required for ignition
9513 Required speed ignition
max 30kW = 2790rpm
60kW = 3990rpm
90kW = 3510rpm
120kW = 3990rpm
Maximum limitation of 9512
9524 Required speed Low Fire 30kW = 1900rpm
60kW = 1950rpm
90kW = 1900rpm
120kW = 1950rpm
Fan speed required at minimum burner modulation
9525 Required speed Low Fire
minimum 30kW = 1900rpm
60kW = 1950rpm
90kW = 1900rpm
120kW = 1950rpm
Minimum limitation of 9524
9529 Required speed High Fire 30kW = 4650rpm
60kW = 6650rpm
90kW = 5950rpm
120kW = 6650rpm
Fan speed required at maximum burner modulation
9530 Required speed High Fire
maximum 30kW = 4650rpm
60kW = 6650rpm
90kW = 5950rpm
120kW = 6650rpm
Maximum limitation of 9529
9540 Postpurge time 15s Number of seconds that the fan will continue to operate
after the gas valve has closed
9542 Postpurge time minimum 15s Minimum limitation of 9540
9650 Chimney drying Off Function can be used to dry out the lining of a chimney or
used to check the operation of a burner fan without fi ring
the burner with gas (only the fan runs in this mode). Only
active when the heater is in standby and can be interruopt-
ed at any time with a request for heat
9651 Required speed chimney
drying 500rprm Pre-determined speed for chimney drying function. A mini-
mum fan speed of 1500rpm is recommended
9652 Duration chimney drying 10 minutes Duration of chimney drying function (maximum 1440 min-
utes)