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1. What needs to be observed before commissioning
Please specify the gas type, gas group, and connection pressure.
Installation site
Gas-heated tumble dryers must not be operated in a room where cleaning machines oper-
ate with solvents containing perchloroethylene or CFCs. During combustion, any vapors
that are emitted will break down into hydrochloric acid, leading to consequential damage af-
fecting laundry and the machine. Air exchange must not take place if machines are set up in
separate rooms.
Rooms with fuel-burning installations must be adequately aerated and ventilated. Any gas-
heated machine must be considered to be a fuel-burning installation (regardless of its gas
flow rate).
If liquid gas-heated machines are being set up below ground level, the operator must pro-
vide the system with the necessary aeration and induced ventilation equipment in accor-
dance with technical regulations for liquid propane.
If no low pressure occurs when a full fire is burning in all fuel-burning installations, this
means that the room ventilation is working properly, even if the exhaust gases from the in-
stallations are being extracted mechanically. This ensures that the gas is being combusted
correctly and that the exhaust gases are being evacuated completely.
It must not be possible to seal off aeration and ventilation openings.
Before completing commissioning, maintenance, conversion, and repair work, all gas-
conducting components – from the manual shut-off valve to the burner jet – must be
checked for leaks.
Particular attention must be paid to the measuring stubs on the gas valve. Checks must
be performed when the burner is both switched on and switched off.
Installing thermal shut-off equipment on site is recommended.
If gas-heated appliances are accessible to anyone, it is also necessary to check whether
a gas flow monitor needs to be used.
Gas supply
Required flow rate
Appliance type
PDR 914/514
PDR 918/518
PDR 922/522
PDR 928/528
PDR 944/544
The connected load is based on the following consumption calorific values:
Natural gas: 913 BTU/ft³ (34.02 MJ/m³) (Hi))
Liquid propane: 19,625 BTU/lb (45.65 MJ/kg (Hi))
Rated heat load (Hi)
15 kW
18 kW
21.5 kW
30 kW
36 kW
en - Installation notes
Natural gas
0.936 CFM
(1.59 m³/h)
1.118 CFM
(1.90 m³/h)
1.342 CFM
(2.28 m³/h)
1.866 CFM
(3.17 m³/h)
2.242 CFM
(3.81 m³/h)
Liquid propane
2.6 lb/h
(1.18 kg/h)
3.13 lb/h
(1.42 kg/h)
3.75 lb/h
(1.70 kg/h)
5.22 lb/h
(2.37 kg/h)
6.26 lb/h
(2.84 kg/h)
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