How to calculate the watts of a duct heater?
How to calculate the watts of a duct heater?
Consideration must be given to both airflow across the heater and the inlet temperature. B. To calculate the watts per sq. ft. (square foot) of duct area, divide the total watts required by the duct size (Watt density = watts/duct area (ft2). Example: Duct size equal 2 ft. x 3 ft., total watts equal 20,000 watts per sq. ft. 20,000 = 3333 6 C.
What kind of control does a duct heater need?
An electronic step controller provides electronic sequencing control of an electric duct heater up to 12 steps. When interruption of power occurs all stages cycle off. Upon restoration of power the step sequence resumes. SCR (pictured) Solid state relays are used to provide continuous modulation. SCR is the most precise form of heater control.
How does an electric duct heater step controller work?
Electronic Step Controller An electronic step controller provides electronic sequencing control of an electric duct heater up to 12 steps. When interruption of power occurs all stages cycle off. Upon restoration of power the step sequence resumes. SCR (pictured) Solid state relays are used to provide continuous modulation.
How many cycles does an electric duct heater need?
Disconnecting contactors break all ungrounded lines on UL listed duct heaters and are UL approved for 250,000 cycles. There are two types available: • Magnetic – standard for all heaters • Mercury – used where silent operation and/or frequent cycling is desired (optional) 5 – Contactors 7 8 1 – Airflow Switch
Consideration must be given to both airflow across the heater and the inlet temperature. B. To calculate the watts per sq. ft. (square foot) of duct area, divide the total watts required by the duct size (Watt density = watts/duct area (ft2). Example: Duct size equal 2 ft. x 3 ft., total watts equal 20,000 watts per sq. ft. 20,000 = 3333 6 C.
What kind of duct heater can I use?
Carnes electric duct heaters are designed for use in commercial and industrial HVAC duct systems. Our open. coil heater design comes from closely evaluating the needs of design engineers, contractors and end users. Carnes duct heaters may be used to heat an entire building or as a supplemental heating source.
How to install a ducting kit for a water heater?
Restore power to the water heater at the breaker/fuse panel. Press the power button on the UIM (Figure 1). 2. Follow the Operating Your Water Heater section found in the Installation Instructions and Use and Care Guide for restarting your heat pump water heater. 3. Check the UIM for any errors and correct accordingly.
How does the Rheem Protech inlet duct work?
The Rheem PROTECH Inlet Duct connects inlet ducting to a Rheem Proterra Hybrid Water Heater. This allows the water heater to be installed in a confined space like a closet or maintenance room where proper ventilation is required. Proper duct work and ventilation ensure safe and reliable operation of your Rheem hybrid water heater.
