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DN-Rev-LOW Maintenance and Operating

Manual

MEASURING THE EXHAUST AIRFLOW

The exhaust air is measured along the inlet slot of the ventilator. To ensure accurate results take a reading every foot
along the length of the ventilator is recommended.

VANAXIAL VELOMETER

Hold the
instrument
perpendicular to
the VORTEX
BAFFLE and
parallel to the
throat (inlet slot) of
the ventilator.
Velometer should
not exceed three
inches in
diameter.

Measuring Exhaust Air
Figure

PITOT TUBE OR ANEMOM

ETER

Hold the instrument
perpendicular to
the VORTEX
BAFFLE and
parallel to the
throat (inlet slot) of
the ventilator. Take
three readings
across the throat
and average the
results.

Measuring Exhaust Air
Figure 9

Calculating the Exhaust Air

Calculate the average velocity across the inlet slot and refer to the chart below for the
corresponding CFM/ft (l/s/m).

Ventilator Type

Velocity

Exhaust Air Volume

Fpm

m/s

CFM/ft

l/s/m

DN-B-F/DN-DI 450

2.3

100

140

DN-B-F/DN-DI 675

3.4

150

210

DN-B-F/DN-DI 900

4.6

200

275

DN-B-F/DN-DI 1125

5.7

250

340

DN-B-F/DN-DI 1350

6.9

300

410

DN-B-F/DN-DI 1575

8.0

350

480

DN-B-F/DN-DI 1800

9.2

400

550

DN-B-F/DN-DI 2000

10.2

450

620

DN-B-F/DN-DI 2250

11.5

500

690

DN-B-F/DN-DI 2450

12.5

550

755

Chart 1

HANDLE IS UP AND OUT

CORRECT

UP SIDE DOWN

REMOVEABLE INSERT INSTALLATION

Содержание DN REV-LOW

Страница 1: ...DN REV LOW Maintenance and Operating Manual ___________________________ Spring Air Systems Inc Oakville Ontario Phone 905 338 2999 Fax 905 338 0179 info springairsystems com www springairsystems com ...

Страница 2: ... Hood Model Number Designations 2 Principle of Operation 2 VARIFLOW Baffles 3 Baffle Settings 4 REV LOW Maintenance Instructions 4 Cleaning the Exterior 6 REV LOW Maintenance Schedule 6 Trouble Shooting 6 Measuring the Exhaust Airflow 7 Installing the Terminator Baffle 8 REV LOW Startup Report 9 ...

Страница 3: ...f switch Others may have supplied the exhaust fan and on off operator Your SPRING AIR SYSTEMS INC Dry extractor model was selected to best meet the design requirements of your commercial kitchen application The DN series dry ventilator is a UL ULC listed Exhaust Hood without Exhaust Fire Damper Typical SPRING AIR SYSTEMS Dry Rev Low Ventilator Installation Figure 1 An ON OFF selector switch locate...

Страница 4: ...e cooking vapors that comprise of grease smoke and products of combustion rise off the cooking surface Natural convection forces drive the cooking vapors up towards the back wall as shown in figure 2 The kitchen dilution air is entrained into the cooking vapors and the air mixture generally follows the profile of the back and top of the hood The mixture of grease smoke products of combustion lint ...

Страница 5: ... a Charbroiler are opened to the maximum 450 CFM ft position and the VARI FLOW baffles located above ovens or steamers are closed to the minimum 90 CFM ft position This variable adjustment along the length of each hood provides an exhaust system that truly minimizes the amount of exhaust air to properly ventilate any kitchen line up Section View of REV LOW Extractor with Detail of Vari flow Baffle...

Страница 6: ...rance of the slot and feel if there is air movement The air movement should feel the strongest over the heavy appliances broilers Check Air Flow in slot Wiping Interior of Hood 3 If there is no air movement check if the green fan light on the Spring Air remote panel is on If not check the breaker panel or fuse check if the motor starters have pulled in Press the red reset button and finally check ...

Страница 7: ...ng day 1 Empty the grease cups located under the grease trough 2 Remove the grease inserts and wash in a dishwasher or pot sink Use a recognized hood degreaser and clean to bare metal 3 Replace the insert in the hood At the end of the cooking day every six months 1 After removing the grease inserts for cleaning check the position of the Variflow Baffles in the hood The Variflow Baffles should be o...

Страница 8: ... dry ventilator canopy and the underside of the grease trough with damp clothe WEEKLY 1 Remove the grease inserts and wash in a mild detergent and water mixture 2 Cleaning the Hood Exterior Cleaning the Hood Exterior Figure 7 Wipe off the interior of the dry ventilator plenum behind the grease extractor inserts and the interior and exterior of the grease trough Remove the grease cup and clean if n...

Страница 9: ... and parallel to the throat inlet slot of the ventilator Take three readings across the throat and average the results Measuring Exhaust Air Figure 9 Calculating the Exhaust Air Calculate the average velocity across the inlet slot and refer to the chart below for the corresponding CFM ft l s m Ventilator Type Velocity Exhaust Air Volume Fpm m s CFM ft l s m DN B F DN DI 450 2 3 100 140 DN B F DN D...

Страница 10: ...lled on the adjustable baffles B over the light appliances To install the TBDD baffle C onto the adjustable baffle B simply line up the gap on the TBDD baffle C with the lower end of baffle B Tap the TBBD along the length until it is snug on baffle B If the fit is loose remove the TBBD baffle C and gently tap the gap with a hammer in the middle and at each end Re attach to baffle B Install these b...

Страница 11: ...or to front of hood Make Up Air Systems Good Fair Poor None Hood Item Model Length Width No of Baffles Baffle Size Design CFM Baffle No Left to Right Baffle Setting Velocity Reading fpm Calculated Exhaust Volume per Baffle CFM 1 2 3 4 5 6 Total Exhaust Measured CFM Design Exhaust CFM Hood Item Model Length Width No of Baffles Baffle Size Design CFM Baffle No Left to Right Baffle Setting Velocity R...

Страница 12: ...n Exhaust CFM Hood Item Model Length Width No of Baffles Baffle Size Design CFM Baffle No Left to Right Baffle Setting Velocity Reading fpm Calculated Exhaust Volume per Baffle CFM 1 2 3 4 5 6 Total Exhaust Measured CFM Design Exhaust CFM Hood Item Model Length Width No of Baffles Baffle Size Design CFM Baffle No Left to Right Baffle Setting Velocity Reading fpm Calculated Exhaust Volume per Baffl...

Страница 13: ...oods Cartridge Hoods Filter Hoods Surface Fire Suppression Commercial Kitchen Exhaust Fans Kitchen Enviro Systems KES 100 Exhaust Commercial Kitchen Supply Units Compensating Hoods Exhaust Fans Supply Fans Commercial Kitchen Control Panels Variable Speed Exhaust Supply Systems Phone 905 338 2999 FAX 905 338 1079 e mail info springairsystems com www springairsystems com ...

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