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GAS PRESSURE TESTING

Testing gas supply pressure to a unit is a critical tool in properly
diagnosing a problem. Gas supply pressure issues are
common, and many times they are the root cause of recurring
issues. On SRT units, each burner has an individual spark
module. There are no fuel-to-air ratio adjustments. Intermittent
sparking issues, flame quality issues, and ignition issues that
affect all burners are almost always related to gas pressure or
the supply regulator. Because there are also three different sizes
of burner assemblies on each unit, pressure issues can affect
different sizes of burners in different ways. Check gas pressure
using only the method listed, so that the recorded pressures
can help diagnose a specific issue.

Natural Gas Specifications

The supply pressure to the inlet of the unit regulator must be

between a minimum of 7” water column (wc) and a maximum of

14” wc.
The outlet of the regulator must be 5” +.5" wc/-0.0" wc.
The maximum pressure drop from maximum flow to low flow

must be less than .5” wc.

Liquid Propane Specifications

The supply pressure to the inlet of the unit regulator must be

between a minimum of 11” wc and a maximum of 14” wc. The

outlet of the regulator must be 10” +.5" wc/-0.0" wc.
The maximum pressure drop from maximum flow to low flow

must be less than .5” wc.

Connecting to the Unit Manifold

To check pressure on a SRT unit:
1

Uninstall the unit.

2

Remove the burner pan.

3

Assemble the burners.

  WARNING

Do not over-tighten the burner assembly

screws. The burner is designed to have the

burner pan between the burner assembly and

the orifice holder. A small amount of gas

leakage is normal during testing.

4

Disconnect the main gas tube from a 9.2K orifice holder,

and connect the manometer to the main gas tube. Set the

burner to High.

Static Pressure

Static pressure is the gas pressure when there is no gas

movement. Taking this pressure is not an effective diagnostic

tool. Pressure will equalize across any regulator in the gas

supply system. It is not possible to determine necessary

pressures when checking any part of the unit by static pressure.

Low Flow Pressure

Low flow pressure is manifold pressure on the unit taken when

there is minimum gas flow. This pressure will provide an idea if

the unit regulator is operating properly. Low flow pressure must
be within 

PLUS

 .5” wc and 

MINUS

 0.0” wc of the

designated manifold pressure. To find the low flow pressure on

SRT units, light one of the 9.2K burners in the simmer range,

while connected to the other 9.2K burner main gas line.

Example:

 Low flow manifold pressure reading taken on a

SRT unit's 9.2K burner using natural gas was 5.4” wc. Low flow

pressure is good. It falls in range of 5” wc - 5.5" wc.

Example:

 Low flow manifold pressure reading taken with

right front burner on low simmer on a SRT unit with liquid

propane (LP) was 9.7” wc. Low flow pressure is bad. Outside of

range of 10” wc - 10.5" wc.

Maximum Flow Pressure

Maximum flow pressure is the manifold pressure when all

burners are on the High setting. It is normal for the pressure to

drop slightly. The difference in pressure from the low flow

pressure to the maximum flow pressure must be less than .5”

wc.

Example:

 Low flow manifold pressure is 5.4” wc on a SRT

unit. Maximum flow manifold pressure is 5.2” wc. Pressure test

is good. Pressure drop was 0.2” wc, and low flow was 5.4” wc.

Unit is not experiencing a gas pressure issue.

Example:

 Low flow pressure is 10” wc on a SRT unit after

the gas company raised the supply pressure. Maximum flow

pressure is 9.5” wc. Pressure drop is .5” wc. Unit fails pressure

test.

Common Reasons for Pressure Issues

Most often, an insufficient volume of gas is the cause of an

excessive drop in pressure between low flow and maximum

flow. Make sure the following items are to specification:

If a flex-line is present, it must be at least 

1

/

2

" internal

diameter (ID) and no longer than 3 feet long. Many times,

the line is 

1

/

2

" OD.

Shut-off valve should be 

3

/

4

". Most of the 

1

/

2

" shut-off ball

valves are 

3

/

8

" through the ball.

Make sure the supply pressure stays at or above the

minimum supply pressure at full load. Full load is when all

gas appliances in the home are on including the rangetop.

Supply line to the unit is not 

3

/

4

".

Note: If the customer has multiple issues, correct the flex-line

and shut-off first before requesting that the customer replace

the gas line.

UNINSTALL THE UNIT

1

Turn off the power to the unit.

2

Remove the unit from the installation.

Sealed Burner Rangetop with Wok Service

Manual

Troubleshooting Guide

Gas Pressure Testing (continued)

service.subzero.com

828990 REV. A     

25

 

Содержание Rangetop

Страница 1: ...nor any information or images contained herein may be copied or used in whole or in part without the express written consent of Wolf Appliance Inc Wolf Appliance Inc all rights reserved SEALED BURNER RANGETOP PRODUCT RATING PLATE INFORMATION On Sealed Burner Rangetops the product rating plate is on the bottom of the bullnose assembly Important information for each product appears on the product ra...

Страница 2: ...derProcessing Pages WarrantyInfo Warranties start on the day of product installation Search for warranty and service information by serial number customer last name and address using Unit History at http service subzero com Tools UnitHistory Sealed Burner Rangetop with Wok Service Manual General Information Unit Warranty continued service subzero com 828990 REV A 2 ...

Страница 3: ...hese guidelines may result in grave personal injury or damage to the unit countertop or wok grate WOK GRATE INSTALLATION Install the Wok Grate Set the wok grate into the hole in the wok top plate The keyed feature on the wok grate should align with the notch in the front of the wok top plate WARNING The wok grate is very heavy Two people may be necessary to lift the wok grate Verify there is adequ...

Страница 4: ...eavy Two people may be necessary to lift the wok top plate Verify there is adequate clearance around the unit before attempting to lift the wok top plate Failure to follow these guidelines may result in grave personal injury or damage to the unit or wok top plate WOK FRAME ASSEMBLY REMOVAL To remove the wok frame assembly first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate Remove the Wok Fra...

Страница 5: ...screws that hold the wok frame to the spacer rails 2 Lift the wok frame upward from the support rails in the burner box TIP The wok enclosure is made from two 90 pieces that clip together without fasteners WOK FRAME INSTALLATION Install the Wok Frame 1 Set the wok frame onto the support rails in the burner box 2 Use a Phillips screwdriver to install the wok frame mounting screws and the screws tha...

Страница 6: ... Use a 5 8 combination wrench to disconnect the solenoid outlet line 4 Remove the solenoid from the unit SOLENOID INSTALLATION After installing the solenoid install Install the Solenoid 1 Place the solenoid into the unit 2 Use a 5 8 combination wrench to connect the solenoid outlet line 3 Use a 5 8 combination wrench to connect the solenoid inlet line 4 Connect the solenoid wire connectors WOK BUR...

Страница 7: ...all the surface burner into the top of the gas burner 2 Use a 4 mm hex bit to install the screw into the surface burner WOK GAS BURNER REMOVAL To remove the wok gas burner first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Wok surface burner Remove the Wok Gas Burner Lift the gas burner from the elbow s gas outlet at the bottom of the tray WOK GAS BURNER INSTALLATION Install the Wok Gas B...

Страница 8: ...ok grate 3 Wok top plate 4 Wok burner assembly 5 Wok ignitor Remove the Wok Electrode from the Electrode Mount 1 Remove the retaining nut that holds the electrode into the electrode mount 2 Slide the electrode mount upward and away from the electrode WOK IGNITOR ELECTRODE INSTALLATION Install the Wok Electrode into the Electrode Mount 1 Replace the spring on the new electrode and slide the electro...

Страница 9: ...move the wok mounting bracket from the unit WOK MOUNTING BRACKET INSTALLATION Install the Wok Mounting Bracket 1 Install the wok mounting bracket into the unit 2 Use a 1 4 socket to install the wok mounting bracket screws BOTTOM PANEL REMOVAL To remove the bottom panel first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Wok frame assembly 5 Wok burner assembly 6 Wok ignitor 7 Wok tray 8 Wo...

Страница 10: ...it WOK ELBOW INSTALLATION Install the Wok Elbow 1 Insert the wok elbow into the wok orifice holder so that it faces upward and the elbow s outlet will align with the hole in the wok tray 2 Install and tighten the set screw on the side of the wok elbow WOK ORIFICE ASSEMBLY REMOVAL To remove the wok orifice assembly first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Wok frame assembly 5 Wok...

Страница 11: ...nit BURNER CAP REMOVAL To remove the burner cap first remove 1 Burner grate Remove the Burner Cap Lift the burner cap from the burner assembly BURNER CAP INSTALLATION Install the Burner Cap Place the burner cap onto the burner assembly ISLAND TRIM REMOVAL To remove the island trim first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Burner grates 5 Burner caps Then uninstall the unit Remove...

Страница 12: ... from the burner pan 3 Disconnect the electrode wire from the ignitor Burner Cap Burner Assembly Ignitor Electrode Wire BURNER ASSEMBLY INSTALLATION Install the Burner Assembly 1 Attach the electrode wire to the ignitor 2 Place the burner assembly into the burner pan 3 Use a T 15 Torx bit to install the screws holding the burner assembly to the orifice holder torqued to 24 in lb BURNER PAN REMOVAL...

Страница 13: ...N Install the Bezel 1 Place the bezel over the bullnose 2 Use a T 15 Torx bit to install the bezel mounting screws BULLNOSE REMOVAL To remove the bullnose first remove 1 Burner grate s one for 36 units two for 48 units 2 All burner caps 3 All burner assemblies 4 Burner pan s one for 36 units two for 48 units 5 All knobs 6 All bezels Remove the Bullnose 1 Use a 5 16 socket to remove the nuts holdin...

Страница 14: ...e unit Then remove 1 All burner assemblies 2 Burner pan s one for 36 units two for 48 units 3 All knobs 4 All bezels 5 Bullnose Remove the Side Panel 1 Use a Phillips screwdriver to remove the side panel mounting screws 2 Remove the side panel from the unit SIDE PANEL INSTALLATION Install the Side Panel 1 Place the side panel onto the unit 2 Use a Phillips screwdriver to install the side panel mou...

Страница 15: ...ve the manifold inlet line from the manifold 3 Remove any tie wraps that are holding the wire harness to the manifold 4 Remove the manifold from the unit MANIFOLD INSTALLATION Install the Manifold CAUTION When assembling the manifold components use only pipe thread compound Do not use Teflon tape to seal gas connections TIP The new manifold includes the brass fitting 1 Use a combination wrench to ...

Страница 16: ...ssemblies 4 Burner pan 5 Orifice holder Remove the Orifice Holder Mounting Bracket 1 Use a T 15 Torx bit to remove the screws holding the orifice holder mounting bracket to the burner box 2 Remove the orifice holder mounting bracket from the unit ORIFICE HOLDER MOUNTING BRACKET INSTALLATION Install the Orifice Holder Mounting Bracket 1 Place the orifice holder mounting bracket into the unit 2 Use ...

Страница 17: ...nnect the DSI board wire connectors 4 Place the ground connection under the removed orifice holder s hat bracket 5 Use a T 15 Torx bit to install the screws holding the orifice holder hat bracket to the burner box in front of the DSI board SPARK MODULE REMOVAL To remove the spark module first remove 1 Burner grate above spark module to be replaced 2 Burner caps 3 Burner assemblies 4 Burner pan abo...

Страница 18: ...ER REMOVAL To remove the wiring cover for a 48 unit first remove on the right hand side 1 Burner grate 2 Burner caps 3 Burner assembly 4 Burner pan To remove the wiring cover for a 36 unit first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Wok frame assembly Remove the Wiring Cover 1 Use a 1 4 socket to remove the wiring cover mounting screws 2 Remove the wiring cover from the unit WIRING...

Страница 19: ...8 unit first remove on the right hand side 1 Burner grate 2 Burner caps 3 Burner assemblies 4 Burner pan To remove the regulator for a 36 unit first remove 1 Flat wok grate 2 Wok grate 3 Wok top plate 4 Wok frame assembly Remove the Regulator TIP A red cap on a regulator identifies it as liquid propane LP 1 Use a combination wrench to remove the regulator outlet line from the regulator outlet 2 Us...

Страница 20: ... wrench to install the regulator outlet line onto the regulator outlet Sealed Burner Rangetop with Wok Service Manual Component Removal and Installation INSTALL THE REGULATOR continued service subzero com 828990 REV A 20 ...

Страница 21: ... or splice in electrode wire Replace the electrode wire Bad wire connection at spark module Repair the wire connection Defective spark module Replace the spark module Incorrect gas pressure Check the gas pressure and adjust it if necessary Poor ignition at surface burner s Ignitor not positioned properly single burner Seat the ignitor in the burner pan or reposition the ignitor Partially plugged p...

Страница 22: ...ator within 10 ft of unit regulator The secondary regulator and unit regulator should be at least 10 ft apart Unit regulator damaged Check the gas pressure with a manometer No knob or lighted knob display All light displays are dim Issue with the neutral side of the light circuit No display lights Check the voltage to the display light board Defective display light board Replace the display light ...

Страница 23: ...n the orifice holder so that the gas jet is pointing straight down the elbow Incorrect gas type Check the gas type and advise the customer if it is incorrect It may be necessary to convent the unit s gas type Wok does not ignite Bad microswitch at burner valve Replace the microswitch Loose or bad wiring connection Check all wiring against the wiring diagram Bad ignitor Replace the ignitor Bad DSI ...

Страница 24: ...DSI BOARD TROUBLESHOOTING Sealed Burner Rangetop with Wok Service Manual Troubleshooting Guide DSI Board Troubleshooting continued service subzero com 828990 REV A 24 ...

Страница 25: ... minimum gas flow This pressure will provide an idea if the unit regulator is operating properly Low flow pressure must be within PLUS 5 wc and MINUS 0 0 wc of the designated manifold pressure To find the low flow pressure on SRT units light one of the 9 2K burners in the simmer range while connected to the other 9 2K burner main gas line Example Low flow manifold pressure reading taken on a SRT u...

Страница 26: ...INSTALL THE UNIT Install the unit Sealed Burner Rangetop with Wok Service Manual Troubleshooting Guide Install the Unit continued service subzero com 828990 REV A 26 ...

Страница 27: ...ce Holder 823061 205 79 20K Orifice Holder 826443 208 79 9 2K Valve 827440 54 50 15K Valve 827439 67 62 Wok Valve 828838 89 ORIFICE SIZES LP GAS Item Part Number Main Orifice Marking Simmer Orifice Marking 9 2K Orifice Holder 819298 93 41 15K Orifice Holder 816369 117 47 18K Orifice Holder 826445 125 47 20K Orifice Holder 826444 132 47 9 2K Valve 827460 34 33 15K Valve 827456 43 43 Wok Valve 82883...

Страница 28: ...SRT WOK WIRING DIAGRAMS Sealed Burner Rangetop with Wok Service Manual Wiring Diagrams WIRING DIAGRAMS service subzero com 828990 REV A 28 ...

Страница 29: ...Sealed Burner Rangetop with Wok Service Manual Wiring Diagrams service subzero com 828990 REV A 29 ...

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