Turbochef-technologies TurboChef User Manual download pdf (Page 41)

high-voltage transformers are most likely wired in-

phase. As a last check, energize the Microwave

System and verify the voltages between the taps on

each high-voltage transformer. The wiring issue

must be corrected prior to returning the oven to

service, as the voltages must be:



NORTH AMERICA: 208 VAC between 1&2and

240 between 1&3.



LATIN AMERICA: 220 VAC



JAPAN: 200 VAC



INTERNATIONAL: 230 VAC

NOTE

: The terminals with the orange dot or

the orange wire always go to terminal

3 on USA

models

Wiring the Filament Transformers

The installation of filament transformers is

straightforward. Filament transformers are wired

in-phase and in-line. Refer to the schematics on

pages 55-63, detailing the proper wiring.

Specifically, FT1 and FT2 are located in the

middle-far right edge of the schematics.

To verify correct wiring (North America), meas-

ure the voltages between terminals

1&2and 1&3

on FT1 and FT2. The voltages must be 208 and

240 VAC respectively.

NOTE

: The terminals with the orange dot or the

orange wire always go to Terminal

3 on US models.

To verify correct wiring (International), measure the

voltage between the taps on FT1 and FT2. The volt-

age must be 220 VAC (Latin America), 200 VAC

(Japan), or 230 VAC (International).

MEASURING RF LEAKAGE FOR MICROWAVE SAFETY

An RF (microwave) leakage test must be performed

at the conclusion of the following service tasks:



Door removal, replacement and/or adjustment



Wave guide removal and/or replacement



Magnetron removal and/or replacement

WARNING: If the unit fails the radiation

test (leakage greater than 4 mW/cm

), the

oven must be taken out of service immediately until

the defect is corrected. In addition, the CDRH

Regulations 21 Subpart C, 1002.20 requires that

leakage readings of over 4 mW/cm

must be

reported to the manufacturer.

Procedure for Measuring RF Leakage

1. Place the oven in

WARM UP and allow it to warm

up to the set temperature (CCSP). This should

take approximately 13 minutes if the oven is

starting out cold.

2. Once the oven has warmed up, place the oven

into

TEST MODE (see page 14). Place a water

load into the cook cavity. Water load must con-

form to the following specification:

a. Volume: 275ml ± 15ml

b. Temperature: 68 ± 9

F (20 ± 5

c. Vessel: Low form, 600 ml beaker with an

inside diameter of approximately 3.35” (85

mm) and made of Pyrex or glass ceramic.

3. Position the microwave survey meter as shown

in Figure 23.

4. Press and hold the

MGTRON soft key to energize

the Microwave System.

FIGURE 23: Microwave Survey Meter Placement

THE MICROWAVE SYSTEM

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 93 94

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