Product Manual

wc_tx004573gb.fm

Operation GP

CO detectors/

alarms

Install CO detectors/alarms in all areas that may be occupied by people or animals

while the generator is operating. CO detectors/alarms provide an extra measure of

protection against this poison that you cannot see or smell.

Install battery-operated CO detectors/alarms or plug-in CO detectors/alarms with

battery backup, according to the manufacturer’s instructions. CO detectors/alarms

should be certified to the requirements of the latest safety standards (UL 2034,

IAS 6-96, or CSA 6.19.01). Test the CO detector/alarm batteries regularly

according to the manufacturer’s instructions.

4.8 Generator Derating

All generators are subject to derating for altitude and temperature. Internal

combustion engines, unless modified, run less efficiently at higher altitudes due to

the reduction of air pressure. This translates into a lack of power and thus

reduction in generator output. Temperature affects both engine and generator

performance. As temperature increases, an engine will run less efficiently and

more resistance will be found in electrical components. Therefore, as the

temperature increases, the output of the generator decreases. Altitude also affects

the cooling capacity of air—the higher the altitude the less dense the air is and thus

the lower its ability to transfer heat.

For every increase in altitude of 500 m (1650 ft) above 1000 m (3300 ft), the output

of the generator will be reduced by 3%. For every increase of 5°C (9°F) in ambient

temperature above 40°C (104°F), the output of the generator will be reduced by

3%. Use the tables shown for altitude and temperature deration factors. It may be

necessary to consider both altitude and ambient temperature deration factors to

determine true generator output.

Ambient temperature

°C (°F)

Derate Factor

45 (113) 3 % 0.97

50 (122) 6 % 0.94

55 (131) 9 % 0.91

60 (140) 12 % 0.88

Altitude

m (ft)

Derate Factor

1500 (4900) 3 % 0.97

2000 (6600) 6 % 0.94

2500 (8200) 9 % 0.91

3000 (9900) 12 % 0.88

3500 (11500) 15 % 0.85

4000 (13100) 18 % 0.82