Desa Master WA 33 Operating Manual page 30

In order to ensure proper use and fault-free operation of the furnace, read this manual carefully.
1. Destination
The WA 33 universal oil heater is intended for heating the industrial rooms which are not included in the
central heating system (workshops, car maintenance services, industrial halls, warehouses, inventory
buildings, basements, garages, etc. The furnace may operate with the use of most mineral and plant oils
such as, for instance, engine oils, fuel oils, gear oils, hydraulic oils, oils of HBO I, II, III type with the
maximal kinematic viscosity of 6.00 mm²/s at the temperature of 20ºC, flash-point temperature not lower
than 40ºC and thickness not less than 0.94 g/cm³.
Due to the local regulations, it is recommended to apply the diesel oil, fuel oil or biodiesel oil.
DO NOT APPLY TRANSFORMER OILS
THEY MAY CONTAIN SUBSTANCES DETRIMENTAL TO THE OPERATION OF THE
FURNACE
2. Environmental storage conditions
The WA 33 universal oil heater should be stored in the following conditions:
• temperature -20..85°C
• relative humidity 5..85%
• pressure 800..1200hPa
• dust-free
• environment free from chemical pollution.
3. Environmental conditions of use
The WA 33 universal oil heater should be used in the following conditions:
• temperature 0..30°C
• relative humidity 5..85%
• pressure 800..1200hPa
• protection level against the environmental impact IP20
• good ventilation of the heated room.
4. Characteristics of the controller
• possibility to adjust the furnace power within the range of 22 and 30 kW,
• protection of the furnace against overheating,
• protection against oil overflow in the furnace,
• automatic maintenance of settings at the voltage decay,
5. Safety aspects
The WA 33 universal oil heater is supplied from the 230V, 50Hz alternating current mains. A fuse with a
fuse-element (1A, 250V) has been installed on the housing of the control module. The replacement of this
fuse should be carried out unconditionally when the external power supply of the system (230V AC,
50Hz). is cut-off.
The WA 33 universal oil heater is equipped with two bimetallic sensors ensuring safe and economical
operation of the device.
The bimetallic sensor placed in the furnace chamber reacts by opening contacts, when the temperature
drops below 35°C. In the emergency situations (overheating, oil overflow) the processor checks the signal
from the bimetallic sensor and switches on the exhaust fan until the furnace is cooled off to the
temperature below 35°C.
2