Denlar D1000 - Ducting & Airflow; Static Pressure Testing

The D1000
Installation and
Service
Version 2.1
2 7
Magnehelic Gauge Test Port
The ductwork and ttings used for outside venting must be carefully selected to insure that the static pressure is
in line with the fan parameters.
Please see table below for maximum duct length and number of ttings allowed for the various fan options.
Width FanType Venting CFM(athood) DUCTLENGTH(max)
D1030F_ 30" INTERNAL FRONT(recirc) 140CFM N/A
D1030F_(NFPA101) 30" INTERNAL FRONT(recirc) 500CFM N/A
D1030R_ 30" INTERNAL REAREXPELLING 250CFM N/A
D1030R_(NFPA101) 30" INTERNAL REAREXPELLING 500CFM N/A
D1030I_DF 30" InLineDuctFan VertcalDuct 470CFM 35FEET
D1030I_DF(NFPA101) 30" InLineDuctFan VertcalDuct 510CFM 35FEET
D1030I_WF 30" ExteriorWallFan VertcalDuct 150CFM 20FEET
D1030I_WF(NFPA101) 30" ExteriorWallFan VertcalDuct 550CFM 20FEET
D1036F_ 36" INTERNAL FRONT(recirc) 140CFM N/A
D1036F_(NFPA101) 36" INTERNAL FRONT(recirc) 500CFM N/A
D1036R_ 36" INTERNAL REAREXPELLING 250CFM N/A
D1036R_(NFPA101) 36" INTERNAL REAREXPELLING 500CFM N/A
D1036I_DF 36" InLineDuctFan VertcalDuct 470CFM 35FEET
D1036I_DF(NFPA101) 36" InLineDuctFan VertcalDuct 510CFM 35FEET
D1036I_WF 36" ExteriorWallFan VertcalDuct 150CFM 20FEET
D1036I_WF(NFPA101) 36" ExteriorWallFan VertcalDuct 550CFM 20FEET
Volts=115::Hz=60Amps::LightBulb=60A15/TF::Elec.Cutoff=50A208VACRelay::GasCutoff=110VACSolenoid
WARNING: The amount of ttings and ductwork directly aects the resistance or static pressure placed on the
system. If the system is not within the proper static pressure range, the heat sensors and controls will be ad-
versely aected and will impact the proper functioning of the safety controls. Therefore it is required that air
ow testing be recorded along with install documentation. The air testing area is accessed by the removal of the
grease tray and measured with an air ow pressure gauge.
Static Pressure Testing
The magnehelic gauge test port opening is located beneath the grease tray. The static pressure needs to be
measured to ensure air ows meet design criteria. The airow is measured by attaching the gauge tubing to the
magnehelic gauge inlet, and the hood tting is attached to the grease drain hole beneath the grease tray.
A reading of 0.45” to 0.85” (of water) is required to meet design standards. This reading will correspond to the
static pressure of the ductwork, hood and fan combination. For other ductwork congurations not meeting the
above specications, please contact our engineering department and a custom solution can be developed.
Ducting & Airow