andrews COMBIflo 100/300 Installation, Operation And Maintenance Manual page 49

33. With the DHW tank temperature below 50
be in the range 9.0% to 9.3%. Also check that CO does not exceed 200ppm (typical expected valves will be
between 100ppm and 160ppm) at any time during this commissioning operation.
34. With the DHW tank temperature remaining below 50
gas consumption rate at the meter, with only this appliance in operation. Th e gas consumption should be within
5% of the data plate gross kW input value.
Compare the gas consumption rate at the meter against the following table:
35. With all the heat engines in operation, continue to allow the DHW tank temperature to rise towards the set-point
and monitor the CO
current DHW tank temperature). During the last 3
be operating at their minimum modulation level.
CO 2 levels at minimum modulation level should typically be between 8.4% and 9.0% and CO levels (except
immediatley after ignition) should not exceed 200ppm. If you are experiencing readings that are outside any of
these expected values, please fi rst check that your gas analyser is functioning correctly and then contact Andrews
Water Heaters on the customer support number on the rear cover of this manual, for advice.
ANDREWS COMBIfl o DRAFT
O
C (see point 3) check the overall CO
Rating Table (1040 Btu/ft³) (38.8 MJ/m³)
gross kW gross Btu/h
102 348,271
152 518,992
2
and CO up until the set-point is reached (this should take 4 - 8 minutes, depending on
O C (all heat engines will be operating at full load) check the
ft³ per min m³ in 2 mins
5.6 0.32
8.4 0.48
O
C before DHW set-point is reached, alll the heat engines will
47
2
combustion fi gure, which should
GB/IE