WOLF wall and ceiling mounted air heaters
Economical heating
Wall and ceiling mounted air heaters
WD-A units are heated with site-supplied warm water (PWW), hot water (PHW), thermal oil, or steam (custom design) and are available with two to four-row heat exchangers.
Depending on how the unit is equipped, it can switch between mixed air, fresh air and recirculating air operation manually or via a control unit.
Technical specifications at a glance
- airflow rate up to 8950 m3/h
- heat exchangers with up to 4 rows
- heating capacity (air intake = 15 °C; PWW 90 / 70 °C) up to 103.7 kW
- motor rating up to 750 W
- power consumption up to 1.5 A
- available as ceiling mounted and wall mounted air heaters
- complete line of accessories
- multiple control options
- 5 motor versions available
- optional finish
The drive for quality
A compact, extremely quiet and low-maintenance sickle-blade fan ensures
reliable, long-lasting operation. The special shape of the steel fan blades ensures an extremely low noise level. The drive is incorporated into the fan wheel and is available in 5 different motor versions. Depending on the version, the motors feature 2-stage, 5-stage, or stepless control. The fan fatigue life is over 100,000 hours of operation!
Air discharge
WD-A air heaters are available with manually adjustable directional louvers or with automatically adjustable energy saving louvers. When equipped with a discharge cone or energy saving louvers, WD-A air heaters can be used in rooms with ceiling heights above 5 m. For entryway air curtain applications, the unit is equipped with a discharge nozzle.
Automatic louver adjustment
Energy saving louvers driven by the 678 control unit prevent the air stream from drifting in cases where there is a high temperature differential between the primary air (from the WD-A) and the secon-dary air (indoor air). In the choke position , an "aggregate air stream" is created by mixing indoor air with the warm air as it flows out. This serves to increase the temperature evenly throughout the room and saves energy. The control unit determines the difference between the required and the actual room temperature, and then activates the servomotor for the choke louver. Optionally, the louver can also be controlled using an expansion cylinder or an open/close button.
Temperature distribution
WD-U recirculating air unit
WD-U (recirculating air units) are also available with 5 different motor versions, but are designed purely for air recirculation. They do not contain heat exchangers.
Efficient and economical
Fan unit
The axial fan is mounted on the rear wall of the housing and protected by a fine-mesh contact grille.
Heat exchangers
Alternative: Galvanized or stainless steel; Available with 2, 3, or 4-row heating coils, depending on heating requirements.
Housing
Electrical connection
Ceiling mounted air heaters
Discharge louve 500
(standard)
Discharge version: ceiling, 2-sided
360° manually adjustable louvers
Discharge louver 500
(standard)
With substructure discharge louver 503
Discharge version: ceiling, 4-sided
2-sided, 90° offset
Louvers manually adjustable inward
Discharge louver 502
(ceiling mount only)
Discharge version: ceiling, 4-sided
Louvers manually adjustable outward
Energy saving louver 506
Discharge version: ceiling, 2-sided
With directional (LJ) and choke louver (DJ)
LJ adjustable manually or via servomotor; DJ adjustable manually, by servomotor or by non-electrical expansion cylinder
Discharge cone 600
Discharge nozzle 610
Wall mounted air heaters
Discharge louver 500
(standard)
Discharge version: wall, 1-sided
360° manually adjustable louvers
Discharge louver 500
(standard)
With substructure discharge louver 503
2-sided, 90° offset
Discharge version: wall, 4-sided
Louvers manually adjustable inward
Induction louver 500
Discharge version: wall, 1-sided
Louvers manually adjustable outward
Energy saving louver 505
with directional (LJ) and choke louver (DJ)
discharge version: wall, 1-sided
LJ adjustable manually or via servomotor; DJ adjustable manually, by servomotor or by non-electrical expansion cylinder
Accessories
Our line of accessories includes wall and ceiling brackets, air ducts, elastic fasteners, filter parts, intake and discharge hoods, and electrical accessories (control devices, thermostats, servomotors, etc.).
Control unit
Up to 19 WD-A air heaters or WD-U recirculating air units can be operated with a single control device. Depending on the version, the motors feature 2-stage, 5-stage or stepless control, allowing them to cover a wide range of applications.
The temperature can be controlled based on the room temperature, the time, or a combination of time and room temperature conditions.