Middleby Marshall PS360WB-U, PS360-L Checking the Gas Supply Inlet Pressure, Volumetric Method

Page 14

ENGLISH

SECTION 2 - INSTALLATION

E.Checking the Gas Supply (Inlet) Pressure

1.Remove the supply (inlet) pressure cap screw from the multifunction gas valve. Attach a manometer to the stud.

2.Depress the machinery compartment safety switch to allow the oven to operate.

3.Open the main gas supply valve. Switch the circuit breaker/ fused disconnect to the ON ("I") position.

4.Start the oven and adjust the temperature controller to the maximum setting (288°C).

5.Measure the supply (inlet) pressure.

6.Switch the oven off. Close the main gas supply valve, and switch the circuit breaker/fused disconnect to the OFF ("O") position. Remove the manometer, and replace the cap screw onto the multifunction gas valve.

7.Compare the measured supply (inlet) pressure to the nominal pressures shown in the Gas Orifices and Pressure Specifications table.

If the supply pressure is lower or higher than the nominal pressure, the reason should be investigated and the gas supplier contacted.

For natural gas ovens, if the measured supply pressure is lower than 17mbar, or higher than 25mbar, contact the gas supplier. DO NOT OPERATE THE OVEN or adjust the oven controls.

F.Adjusting the Orifice (Manifold) Pressure and Heat Input

To use the orifice pressure method, you must know the specific gas type and quality used. If using the orifice pressure method, you should double-check the input using the volumetric method.

To use the volumetric method, you must know the heat value (HuB) of the gas used. This information is available from your gas supplier.

During these measurements, do not operate any other appliances that use the same gas meter as the oven.

1.Orifice (Manifold) Pressure Method

a.Check that the main gas supply valve and the circuit breaker/fused disconnect are in the OFF ("O") position.

b.Remove the regulated (manifold) pressure cap screw from the multifunction gas valve. Attach a manometer to the stud.

c.Remove the cap screw from the pressure adjustment screw (governor) on the multifunction gas valve.

d.Depress the machinery compartment safety switch to allow the oven to operate.

e.Open the main gas supply valve. Switch the circuit breaker/fused disconnect to the ON ("I") position.

f.Start the oven and adjust the temperature controller to the maximum setting (288°C).

g.Adjust the pressure adjustment screw as necessary to match the correct pressure for the oven's specific gas type. Refer to the Gas Orifices and Pressure Specifications table. Turning the adjustment screw clockwise increases the flow, while turning it counterclockwise reduces the flow.

h.Switch the oven off. Close the main gas supply valve, and switch the circuit breaker/fused disconnect to the OFF ("O") position. Remove the manometer, and replace the cap screws onto the multifunction gas valve.

2.Volumetric Method

a.Determine the time of 0.1m3 (100 liters) of gas usage as follows.

Consumption (m3/hr.) =

 

NB (Rated input in kW)

HuB (Heat [Calorific] value

 

 

 

 

 

of gas in kW/m3)

Time (in minutes) of

=

 

6

 

0.1m3 of gas usage

 

Consumption

 

 

b.Check that the main gas supply valve and the circuit breaker/fused disconnect are in the OFF ("O") position.

c.Remove the cap screw from the pressure adjustment screw (governor) on the multifunction gas valve.

d.Depress the machinery compartment safety switch to allow the oven to operate.

e.Open the main gas supply valve. Switch the circuit breaker/fused disconnect to the ON ("I") position.

f.Start the oven and adjust the temperature controller to the maximum setting (288°C).

g.Adjust the pressure adjustment screw as necessary to match the calculated volume using the time (in minutes) of 0.1m3 of gas usage. Turning the adjustment screw clockwise increases the flow, while turning it counterclockwise reduces the flow.

h.Record the reading obtained from the gas meter and calculate the obtained gas flow. Compare this value to the information in the Gas Orifices and Pressure Specifications table.

i.Switch the oven off. Close the main gas supply valve, and switch the circuit breaker/fused disconnect to the OFF ("O") position. Replace the cap screw onto the multifunction gas valve.

14

Page 13 Page 15
Image 14
Page 13 Page 15
Contents PS360 PS360WBFor Your Safety EnglishTable of Contents Oven Uses III. Oven SpecificationsDescription English II. Oven Components see FigureGas orifice and pressure specifications per oven cavity InstallationElectrical specifications per oven cavity Additional installation kit components for gas ovens Installation KITInstallation kit components one kit required per cavity 710Recommendations II. Ventilation SystemRequirements Other ventilation concernsIII. Assembly IV. Thermocouple InstallationConveyor Installation Removing the Conveyor Drive SprocketVI. Final Assembly 11 Conveyor and Master Link OrientationVIII. GAS Supply DURINGPRESSURETESTINGNOTEONEOFTHEFOLLOW- INGVII. Electrical Supply Gas Line Gas Utility Rough-In RecommendationsGas Meter Preparation for Use with Various Gases Replacing the Gas Orifices if so requiredChecking the Gas Supply Inlet Pressure Adjusting the Orifice Manifold Pressure and Heat InputVolumetric Method Orifice Manifold Pressure MethodOperation Conveyor Switch Turns the conveyor drive motor on and offReset Switch Gas ovens only. Illuminates Location and Description of ControlsII. Normal Operation STEP-BY-STEP DailystartupprocedureDailyshutdownprocedure III. Quick Reference Digital Temperature Controller IV. Quick Reference Troubleshooting SymptomMaintenance Maintenance DailyII. Maintenance Monthly Removing the ConveyorIII. Maintenance Every 3 Months Split Belt Disassembly and CleaningDescription IV. Maintenance Every 6 MonthsKEY Spare Parts KIT Available sepa- rately. See Figure Diagrams 400V, 50 Hz, 1 PhCompartment An electrical wiring diagram for the oven isImportant also located inside Gas OvenPS300 serien gas- og elektriske ovne Reguleret opvarmningszone Regulerede opvarmningszonerDansk MeddelelseAfsnit 3 Betjening AFSNIT5-LEDNINGSDIAGRAMMERIndholdsfortegnelse AFSNIT4-VEDLIGEHOLDELSEII. Ovnkomponenter se Figur Afsnit 1 Beskrivelse DanskOvnens Anvendelsesmuligheder III. OvnspecifikationerTabel 1-4 Specifikationer for gasåbning pr. ovnhulrum Afsnit 2 InstallationTabel 1-3 Generelle specifikationer pr. ovnhulrum Enhed Beskrivelse Delnummer InstallationssætYderligere komponenter til installationssæt til gasovne ØversteovnAnbefalinger II. VentilationssystemKrav Andre ventilationsanliggenderIV. Installation AF Termoelement III. MonteringBemærk Installation AF TransportbåndDansk VI. Endelig Montering 11 Transportbånds- og samleledsretningUnder Trykprøvning Skal ET AF Følgende Bemærkes VII. StrømforsyningVIII. Gasforsyning Forsigtig Udførelse af disse procedurer, skal Der Udføres Gasudsivningstest, før ovnen betjenesForberedelse til brug med forskellige gastyper Udskiftning af gasåbninger hvis det krævesJusteringen af åbningens tryk manifold og varmetilførsel Volumetrisk metodeKontrol af gasforsyningstrykket indgang Åbningstrykmetoden manifoldHeat varme kontakt Tillader at brænder Afsnit 3 BetjeningPlacering OG Beskrivelse AF Betjeningsknapper II. Normal Betjening Trin for Trin DagligopstartprocedureDaglignedlukningsprocedure III. Hurtig Reference Digital Temperaturregulator IV. Hurtig Reference Fejlfinding Vedligeholdelse Dagligt Afsnit 4 VedligeholdelseBemærk ForsigtigII. Vedligeholdelse Månedlig Eksempler på markeringerIII. Vedligeholdelse Hver 3. Måned Afmontering og rengøring af dobbeltbåndEnhed Del nr Beskrivelse IV. Vedligeholdelse Hver 6. MånedNøgle Reservedelssæt fås separat. Se figur 380-400V, 50 Hz, 1 fase AfbryderePS360-U/-L eller Der findes også et ledningsdiagramMaskinkassen Gasovn, 220-230V, 50Hz
Top Page Image Contents