Bosch NGMP055UC/01, NGM8665UC/01, NGM8655UC/01, NGM8065UC/01, NGM8055UC/01 Installation Guide

LP Gas Conversion Kit

installation Manual

...............................................................................................................................Envented for life ..........

NGM Gas Cooktop LP Gas Conversion

Conversion Instructions

BOSCH COOKTOP CONVERSION KIT FOR
TRADITIONAL MODELS NATURAL GAS (NG) TO

PROPANE (LP) GAS

NEZ1054

This kit is used to convert only NGM sealed burner
cooktops from natural gas operation to propane gas
operation. This kit cannot be used to convert other Bosch
model sealed burner cooktops, ranges or any other brand
of cooktops.

A WARNING

This conversion kit shall be installed by a qualified
service agency in accordance with the manufacturer's
instructions and all applicable codes and requirements

of the authority having jurisdiction. If the information in
these instructions is not followed exactly, a fire,
explosion or production of carbon monoxide may result
causing property damage, personal injury or loss of life.
The qualified service agency is responsible for the
proper installation of this kit. The installation is not
proper and complete until the operation of the converted
appliance is checked as specified in the manufacturer's
instructions supplied with the kit.

_1_CAUTION

When connecting the unit to the propane gas, make
certain the propane gas tank is equipped with its own
high pressure regulator. In addition, a pressure
regulator was supplied with the cooktop. This second
regulator must be installed with the cooktop. The
maximum gas pressure to this appliance is not to
exceed 14.0 inches water column from the propane gas
tank regulator.

The following must be met when testing supply piping
system:

a) The appliance and its individual shut-off valve must
be disconnected from the gas supply piping system at
test pressures in excess of 1/2 psig (3.5 kPa).

b) The appliance must be isolated from the gas supply
piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than 1/2
psig (3.5 kPa).

IMPORTANT: Only a qualified service technician or
installer should make this conversion

INSTALLER: Please leave these Installation Instructions
with this unit for the owner.

OWNER: Please retain these instructions for future
reference.

For Massachusetts Installations:

1. Installation must be performed by a qualified or
licensed contractor, plumber, or gas fitter qualified or
licensed by the state, province or region.

2. Shut-off valve must be a "T" handle gas cock.

3. Flexible gas connector must not be longer than 36
inches.

English 1

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Preparation

Installation Kit Contents

Component

Quantity

Conversion Kit Instructions
Conversion Sticker

Foam Tape
95 Orifice

66 Orifice
44 Orifice

Note:

Depending on the model, the kit may contain more
components that are necessary to complete your

conversion.

Tools Required

7mm socket

driver (3 inch

minimum

extension

Main Orifices

NGM5055UC

1
1

1
3
2

1

122

95
95
66

Front Right 15,000
Front Left 9,100
Rear Left 9,100
Rear Right 5,000

NGM8055, 8065UC

122 Center 15,000

BTU/hr

66 Front Right 5,000
95 Front Left 9,100
66 Rear Left 5,000
95 Rear Right 9,100

NGMP055UC

109 Large Center 15,000

44 Small Center 5,000
66 Front Right 5,000

95 Front Left 9,100
66 Rear Left 5,000
95 Rear Right 9,100

NGMP655UC

blade

adjustable
wrench and/

or slip joint
pliers

109 Large Center 15,000

44 Small Center 5,000
95 Front Right 9,100
95 Front Left 9,100
95 Rear Left 9,100
66 Rear Right 5,000

NGM5655, 8655, 8665UC

122 Center 15,000

95 Front Right 9,100
95 Front Left 9,100
95 Rear Left 9,100
66 Rear Right 5,000

English 2

Installation Procedure

This conversion process adjusts the flow of gas to the
burners to accommodate an LP gas fuel source.

A CAUTION

TURN OFF GAS AND ELECTRICITY.
If the cooktop is installed in the counter,

1) shut off the gas valve for the gas supply line to

the cooktop.

2) remove the cooktop power cord from the
electrical outlet or turn off the breaker at the breaker

box.

3) turn all control knobs to the "Off"position.

Checklist

Each of the following steps must be completed
correctly for the appliance to function properly.

Check off each step as it is finished.

__ Step 1 - Convert the pressure regulator to use LP gas.
__ Step 2 - Remove the grates andburner caps. Remove

the Natural Gas (NG) orifices and replace them with
the LP gas orifices supplied with this kit.

__ Setp 3 - Replace the burner caps and grates
__ Step 4 - Adjust the unit valves to LP settings.

Step 1 - Convert the Pressure Regulator

Locate the pressure regulator on the bottom right end of
the cooktop.

Note: The arrow on the back of the regulator must

point in the direction of the gas flow to the
cooktop.

Remove the hexagon shaped cap from the regulator
making sure not to dislodge the gasket on the cap or the
spring inside the regulator.

plastic

button stem

spring

gasket

Grasp the plastic button stem (stem) firmly and pull it
forcefully from the metal cap. The stem snaps snugly into
an indent in the cap and may require a strong pull to
remove. (Hint: it may be helpful to gently "rock" the plastic
stem while pulling it from the metal cap.")

After removing the stem from the cap, rotate the stem 180 °
so the button end of the stem is away from the cap and the
letters "LP" on the stem are upside down when the cap is
set fiat on its head. Snap the stem back in place in this

/

English 3

positioninsertingitintotheindentinthemetalcap.The
stemshouldsnapintoplace.

Natural LP

Gas Gas

Important - Attach the metallic sticker (included with this
conversion kit) to the bottom of the appliance as shown,
placing it near the appliance data plate (shows model
number and information about the appliance). This sticker
provides notice that the appliance has been converted for
use with LP gas

a. b. c,

Save the NG orifices in case there is need later to restore
the appliance to use natural gas again.

,

Identify the correct placement of the LP gas orifices as
layed out on the orifice package card.

Note: The NGMP055UC and NGMP655UC models
have an extra hidden orifice underneath the center unit

cap. It is necessary to remove the burner cover plate to
change the hidden (smaller) center orifice.

bottom of cooktop

Step 2 - Replace the Orifices

1. Remove the grates and burner caps.
Note:Do not remove the ignitor from the unit.

2. Remove the orifices.

Note:

Hint:

The orifices require a 7 mm socket driver for
removal/replacement. The driver will need to be
inserted approximately 2 1/2" (64 mm) into the
burner cavity to reach the orifice.

Toreduce the chance of the orifice being dropped
from the socket driver, add a piece of foam tape or
adhesive tape inside the socket.

a) Trim a small piece of the foam tape provided with

this kit (about 1/4" x 1/2"; 6mm x 12mm).

b) Fit this so the tape wraps against one side of the

socket so it stays in place.

c) When pressing the socket driver onto the orifice,

the tape will fit to the orifice and help prevent the
orifice from falling out of the socket during

extraction.

center

orifice

The orifice sizes are shown in the white circles
corresponding to each burner as shown in the image

below. These numbers are engraved on the top of each
orifice. It is very important install the correct orifice size

for each burner.

NGM5055UC

English 4

NGM8055, 8065UC

NGMP055UC

am b_

This will help prevent the orifice from falling out of the
socket during insertion.

Step 3 - Replace the Burner Caps and
Grates

Replace the grates and burner caps. Be sure the
grates are correctly placed and the rubber feet on the
grates engage the indents in the cooktop for proper
position.

Step 4 - Convert Valves for LP Gas

NGMP655UC

,

Insert each of the LP gas orifices provided with this kit
into the socket (using the small piece of foam tape to
assure a tight fit).

a) Check to be sure the small piece of foam tape used

earlier is fitted to wrap against one side of the
socket.

b) When pressing the socket driver onto the orifice,

the tape will help the orifice fit more snugly inside
the socket. This will help prevent the orifice from
falling out of the socket during insertion.

The bypass jet on each valve must be adjusted. Your
cooktop may come with either hollow or solid valve shafts.
Determine the bypass screw location accordingly.

1. Turn all knobs to the "Off" position.

2. Remove knobs.

English 5

Test the Installation

Test for Gas Leaks

A WARNING

\

Yourappliancewillhaveeithera)hollowstemvalves,orb)
solidstemvalves.Thelocationoftheadjustmentscrewis
determinedbywhichtypeofvalveyourappliancehas.

3. Locatethecorrectpointofinsertionforthelong,thin
flatbladescrewdrivertoadjustthebypassjet(seethe
followingillustration).

f'x

i _i¸

a. Hollow Stem b. Solid Stem

NEVER TEST FOR GAS LEAKS USING A FLAME.

If any leaks are detected, do not proceed past this

step until all leaks have been eliminated.

Leak testing is to be conducted by the installer according to
the instructions given in this section.

Turn on gas. Apply a non-corrosive leak detection fluid to
all joints and fittings in the gas connection between the
shutoff valve and the cooktop. Include gas fittings and

joints in the cooktop if connections may have been

disturbed during installation. Bubbles appearing around
fittings and connections indicate a leak. An electronic Gas

Leak Detector can also be used.

If a leak appears, turn off the supply line gas shutoff valve
and tighten the leaking connections. Retest for leaks by
turning on the supply line gas shutoff valve. When the leak
check is complete (no bubbles appear), the test is
complete. Wipe off all detection fluid residue.

Check Manifold Gas Pressure

a) Hollow stem valve - insert a long, thin flat blade

screwdriver in the hollow stem of the valve. The
adjustment screw is approximately 1 1/2" (39 mm)

from the top of the stem. The screwdriver slides
through a thin rubber barrier in the stem (helps
prevent damage in the case of a spill on the unit
surface).

b) Solid stem valve - insert a long, thin flat blade

screwdriver through the seal in the area shown.

,

Engage the tip of the screwdriver into the adjustment
screw by slowly turning the screwdriver and feeling for
the blade to engage the screw. Then turn the screw
clockwise about 70 degrees (less than 1/4 turn) until it
"bottoms out" (does not turn any further). The screw
does not take much pressure to turn. Stop when the
screw does not easily turn any further. Repeat for each
valve until all have been adjusted correctly.

,

Replace the knobs

During any pressure testing of the gas supply piping
system at test pressures greater than 14" of water column
pressure (approximately ½" psig, 3.5 kPA) it is necessary to
disconnect the cooktop and its individual shut-off valve

from the gas supply piping system.

If it should be necessary to check the manifold gas
pressure, connect a manometer (water gauge) or other
approved gas pressure reading device to the top burner
right rear orifice. Using a rubber hose with inside diameter
of approximately 1/4" hold tubing down tight over orifice.

Turn burner valve on.

English 6