Wells Manufacturing G-246W Service Manual

WELLS MANUFACTURING COMPANY

PRELIMINARY SERVICE MANUAL

GENERAL

The model G 246W is a 208 volt Griddle. Factory mired For three phase operation (see
wiring diagram # 41394 for single phase connections).

The Griddle has two control panels housing two control thermostats and two indicator
lamps For each half of the Griddle.

The Griddle has an (total of four) individual thermostat For each of the four heating
surfaces.

The Griddle has a four-section (eight elements arranged in Four groups of two elements)
heating surface.

Each element section and its control thermostat have a pilot lamp assembly (indicator) to
show when the element is heating.

The cooking surface of the Griddle can be set for variable temperatures across the
cooking surface (ie. hotter in the center or at one side or the other).

Service information and procedures contained in the following pages are a guide for
maintenance of the Griddle. Service and repair of this equipment should be performed only
by qualified and trained service personnel.

It is our belief that the information enclosed in this manual is accurate in detail as of
the date of publication and is subject to revision as further information becomes
available.

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PN#62444

SERVICE PROCEDURES

NOTE: The pilot lamps an this unit cycle on and off with the thermostats when the power is
on. the pilot lamps can be used in the Following manner to aid in troubleshooting the unit
(see troubleshooting guide).

To service the Griddle, access to the back side of the control panels of griddle is
required, and to the underside of griddle may be required.

WITH POWER TURNED "OFF". Open the control panels, proceed with tests below to make
your continuity tests.

ELEMENT TESTS

When testing the elements for continuity and/or resistance at the thermostat terminals you
mill be reading TWO elements in PARALLEL and the cold resistance will be one half that of
an individual element, or 7.3 to 8.85 Ohms.

If you read 15.9 to 17.7 Ohms at the thermostat terminals and all the element jumpers (#5)
are installed, then one element is OPEN (bad). Replace the element.

If you read no continuity, check for a broken wire or open (bad) elements. Replace wire if
broken. IF not, replace the defective element.

THERMOSTAT TESTS

The thermostat Pt.# 61396 has an operating range of 100 to 450 degree F. with two pole
30A. contacts rated at 277U resistive load.

With power "OFF" to the griddle, test thermostat (#1) For continuity, advance the
thermostat to a temperature setting higher than the griddle surface.
The contacts should now be CLOSED. IF not, the thermostat should be replaced.

Disassembly of element and thermostat assemblies.

Use care in disassembling the control panels and thermostat assemblies, as the
capillary tubes are Fragile.

After determining the parts that must be replaced, remove the bottom cover (# 31) screws
and the bottom cover plate (#l). See Drawing # 21054.

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It will be necessary to remove the insulation pad over the element and thermostat clamps
in order to remove the element and sensing bulb clamps.

It mill also require removing the Jumper straps (#5) that are over the insulation pad in
that area.

To remove the insulation pad, bend the insulation tie-down tabs (#18 see Drawing # 21054)
into a vertical position and expose the element and thermostat clamps by carefully Folding
the insulation pad away From the area that requires service.

Remove the element and/or thermostat clamps that are holding the components that require
service. Use care in disassembly to avoid damage to thermostat capillary tube, bulb
assemblies, electrical wiring and components (Note routing of each capillary tube for
reassembly, see drawing # 41397 & 21054).

REPLACEMENT OF ELECTRICAL and MECHANICAL COMPONENTS

When replacement oF elements is required, make sure the new elements are mounted
Firmly to bottom of the griddle by the element clamps (# 4).

When replacing element or thermostat miring use only factory approved type mire, see parts
list For correct specification and type.

When installing new components use EXTREME CAUTION to insure that the capillary tube/bulb
units are NOT kinked or flattened. Route excess tube length into gentle bends to avoid
kinks and sharp bends.

In replacing heating elements, control thermostats, associated wiring and electrical
components be sure to support all terminals with pliers when tightening attachment
terminals to avoid damage to components.

Use standard service practice of full contact between platen (Griddle Plate) and heating
elements. Use anti-sieze on all studs For mounting element and sensing bulb clamps.
Element clamps and electrical connections must be tight and Free From contact with
surrounding wires and connections.

Reassembly (see drawing #41337)

After replacing thermostats, re-mount thermostat body to control panels after sensing tube
assemblies have been installed in the holding clamps (#2, see drawing # 41397) located

next to the element mounting clamps (#4 see cautions on capillary tubes above).

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