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Variable air volume controllers
CBM
Duct heater
Description
Duct heater with integral control equipment
Duct heater with spigot connection for standard spiral
circular ducts. Manufactured from Aluzinc-coated sheet
steel with a heating element in stainless steel. The heater
has integral overheating protection with a manual reset
function. The CBM have rubber seals on the connecting
spigots. The temperature is set on the cover of the duct
heater. The unit is controlled by an integral electronic
temperature regulator, using so-called timeproportional
Pulse/Pause technology. This provides extremely precise
temperature control. As a thyristor is used for adjust-
ing the temperature, the unit has no moving parts. This
means that it is silent and not susceptible to wear and
tear. Terminals for interlocking the heater, via a pressure-
and airflow guard are available in the terminal box. The
minimum air volume is based on a minimum air velocity of
1.5 m/s. These duct heaters are designed for a maximum
output air temperature of 50°C.
All CBMs are delivered with duct sensor TG-K330 (0-30
o
C)
as standard.
Recommended installation positions
A = Heating elements
B = Over heat protection with automatic reset
C = Over heat protection with manual reset
E = Interlocking
F = All phase breaker
H = Thyristor type Pulse or TTC
J = Sensor
T = Air flow switch/Pressure switch
