| Under what approvals are Denlar Range Hoods commonly installed? |
All Denlar products are ETL tested to the UL 300A and UL 507 Standards. While the product line was designed to meet many of requirements outlined in the commercial ventilation and fire suppression standards (UL 300 / 17A and NFPA 96), it is designed to work with residential-grade appliances and their decreased BTU capabilities. With few exceptions, local authorities readily approve our products for installations into churches, day care facilities, assisted living, municipal buildings, university residences and public school classrooms across the country. Whenever a residential-grade appliance is installed, and hood fire suppression is required; The DENLAR Fire Suppressive Range Hood provides a level of protection previously found only in Type I (or commercial kitchen) systems.
|
What fire suppression technology is used in the product? |
Our systems utilize industry standard wet chemical fire suppression system components such as those used in commercial suppression systems. A suppressant tank assembly holding a quantity of Amerex 660 is nitrogen charged and installed with a spring loaded trigger mechanism that employs 2 or more fusible links in a cable / pulley system. The Globe or JOB brand links are used depending on the product. Two or more 60 deg conical solid cone spray nozzles (capped) are employed to spray the surface of the range with suppressant. This spray system is engineered to reach all areas of the surfaces covered by the range hood.
All tanks have a dial type pressure gage that is readily viewed by the occupants; some systems include a pressure switch as well for system monitoring.
|
Is it an Ansul system? |
No. While we do use similar chemistry and system components, this is not an Ansul system or product (read: for a commercial kitchen).
|
Is an electrical shunt trip or gas line shutoff used?
|
Yes – all Denlar products are configured with an interface to a 110VAC powered shut off device, that is hard wired to the range hood fire suppression system. Discharge of the system will cause power to be disconnected to the shutoff device, hence removing the fuel source to the range.
For gas applications, a 110VAC or 24VDC gas valve is supplied for inclusion between the shutoff valve and the appliance; for electrical appliances, a 50A contactor box is provided to connect to the 240VAC line and provide a switched receptacle for the range.
|
What alarm outputs are configured with the system?
|
|
Our systems all employ a 90dB audible buzzer that is housed in the range hood itself and all include a set of dry contacts (NC/NO) to be connected to the fire alarm system, which will change state at a system discharge event. Some of our systems also include a system fault or “trouble” alarm output that will be triggered on high heat or low pressure conditions.
|
What ventilation standards are followed?
|
Denlar range hoods are configured to supply the specified air flow at 0.5” water pressure, and all have been certified to the UL 507 ventilation standard.
|
What is the inspection interval for these products?
|
Per our warranty and installation requirements, these systems should be cleaned and inspected annually by qualified fire equipment service organizations. We recommend semi-annual inspection intervals where appropriate based on the occupancy and use.
Our inspection guidelines do not require system discharge Inspection and Recertification should include cleaning and inspection of the unit, replacement of the fusible links where appropriate, and servicing of the tank system as required.
|
