Belshaw Brothers Tg 50 Users Manual MN 1716EN Thermoglaze 0805

TG 50 to the manual d5cd2c28-b50e-4b67-9881-c47feef6ad88

2015-02-02

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Thermoglaze
Model TG 50
Operator’s Manual
For
Serial Number W04060001 on

Belshaw Bros., Inc.
1750 22nd Avenue South
Seattle, WA 98144-4590
Phone: (206) 322-5474 • Fax: (206) 322-5425
Toll Free: 1-800-578-2547
Email: service@belshaw.com • http://www.belshaw.com

Congratulations on buying a new
Thermoglaze from Belshaw Bros., Inc. Please
inspect the unit carefully for damage or
missing pieces immediately after receiving
your system. Belshaw cannot pay for shipping
damage, because the freight company has
accepted the machine from Belshaw in good
condition, and is responsible for its safe delivery.
For your protection, each crate should be
inspected before signing the Bill of Lading to
report any visible damage caused by the
trucker in transit, and account for the number
of crates.

EQUIPMENT RECORD
Please provide the information below when you correspond with us about your machine.
Purchased by _____________________________________________________________________
Installed by ______________________________________________________________________
Date of Installation ________________________________________________________________
Model number ___________________________________________________________________
Serial number
0805
MN-1716EN
Belshaw Bros., Inc.
1750 22nd Avenue South
Seattle, WA 98144-4590
Phone: (206) 322-5474 • Fax: (206) 322-5425
Toll Free: 1-800-578-2547
Email: service@belshaw.com • http://www.belshaw.com

Contents
1

Unloading and Uncrating

Identification

Installation

Assembly

Operation

Cleaning

Maintenance

Troubleshooting

Appendix

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

iii

Preface
The operator of the Thermoglaze is expected to
behave safely, read this manual before operation,
and follow its instructions and warnings.
Study the instructions and warnings in this
manual carefully before operating the equipment.
A thorough understanding of how to install,
maintain, and safely operate the Thermoglaze
will prevent production delays and injuries. Prior
operation of the equipment before reading and
understanding the instructions in the manual will
void the warranties of the equipment.
To use the Thermoglaze safely, heed the
following warnings and all other warnings that
appear in this manual:
• To avoid damaging the Thermoglaze,
never use force to assemble,
disassemble, operate, clean, or maintain
it.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Unloading and Uncrating
Do not connect the Thermoglaze or the
Thermolizer to electrical power before
completing the assembly and placement of
the products.

DO NOT LIFT EXCESSIVE
WEIGHT
Once the crate has been delivered,
immediately take the covers off the crate and
inspect for hidden damage. If damage is
found, please see the above information to
make a damage claim to the shipping
company. After inspection, cut the banding
and remove any other restrains from the
Thermoglaze unit. Remove the banding and
other packing material from the Thermolizer
unit. Roll the Thermolizer, carefully, off the
skid first and move it near the area where it
will be assembled. Roll the Thermoglaze
unit, carefully, off the skid and move it near
the area where it will be assembled.

Figure 1-1 shows the system in the crate ready to
be unpacked. The cartons under the Thermoglaze
contain the glaze trough and oven guard. See
Section 4 to assemble the unit. The carton in the
Thermolizer contains the doors and other interior
parts. See Thermolizer manual for assembly
instructions.
The Thermoglaze system has been designed for
quick assembly and installation. Within a few
minutes of receiving the system, the installer can
have the Thermoglaze ready to make donuts if
the electrical connections are properly installed
and inspected by the prevailing local authorities.

Figure 1-1
Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Identification

This information is key to identification for
service or ordering parts on the ThermoGlaze.
When servicing the equipment, please have the
Model and serial number so the technician can
order the correct parts for you. To identify which
Thermoglaze system you have, please use the
following model number key:
THERMOGLAZE DESCRIPTION KEY
Model No: - Doz/hr: - Glaze Pump:
TG

Opt. Items: -

Voltage: - Freq: - Phase: -

50
25

G = Gear Pump V = End Cover -50
208
L = Lift Pump M = Mono -50
220/240
N = No Pump
A = RF Oper.
400/230
B = LB Oper.
415/240
Location:
C = LF Oper.
D = RB Oper.
C = CE/Export
T = LB Oper/SPL w/
D = Domestic/Nema
(thermolizer cabinet)
B = Export/Non-CE
W = Domestic/Pin/Sleeve
E = Aust/NZ

50
60

1
3
3 w/N

Note: TG-50 is RF/LB Operate only, without Thermolizer - Screen 17” x 25”
TG-25 includes built in Thermolizer for 12 ½” x 17” Screen
Part No.

Description Key

Drawings

22080
22081
22082
22083
22113
22114
22115
22116

OBS USE 22113, TG-25
OBS USE 22114, TG-25
OBS USE 22115, TG-25
OBS USE 22116, TG-25
TG-25-GA-208-60-1-D
TG-25-GB-208-60-1-D
TG-25-GC-208-60-1-D
TG-25-GD-208-60-1-D

22117
22118
22119

TG-25-GA-220/240-60-1-D JR.
TG-25-GB-220/240-60-1-D JR.
TG-25-GC-220/240-60-1-D JR.

JR.
JR.
JR.
JR.
JR.
JR.
JR.
JR.

TJ-2004, TJ-4000 w/120V
TJ-2006, TJ-4000 w/120V
TJ-2005, TJ-4000 w/120V
TJ-2007, TJ-4000 w/120V
TJ-2004, TJ-4002
TJ-2006, TJ-4002
TJ-2005, TJ-4002
TJ-2007, TJ-4002
TJ-2004, TJ-4002
TJ-2006, TJ-4002
TJ-2005, TJ-4002

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Part No.

Description Key

Drawings

22120

TG-25-GD-220/240-60-1-D JR.

TJ-2007, TJ-4002

22231
22247

TG-25-GB-415-50-3w/N-C JR
TG-25-GB-415-50-3w/N-E RVO

TJ-2006, TJ-4004 (415/240V)
TJ-2012, TJ-4005 (415/240V)

22010
22054
22011

TG-50-G-208-60-1-W
STD
TG-50-GV-208-60-1-D
STD
TG-50-GV-220/240-60-1-D STD

TNG-2011, TNG-4008
TNG-2011, TNG-4008
TNG-2011, TNG-4008

22013
22067

TG-50-GV-400/230-50-3-C STD
TG-50-GM-400/230-50-3-C SPL

TNG-2011, TNG-4012
TNG-2012, TNG-4012

22251

TG-25-GT-208-60-1-D

TJ-2013, TJ-4002

SPL

Optional Line Items:
SL200-0004
TJ-0001
TJ-1012
SK-1257
SK-1258
SK-1280
SK-1281
SK-1281CE
SK-1314
TNGG-1011
TZ-6 & TZ-17
TNGG-0079
TNGV-2004
TNGV-2005
TNGV-2009

Glazing Screen - 17” x 25” – TG-50
Glazing Screen – 12 ½” x 17” – TG-25
Front Shield Kit – TG-25
Spare Parts Kit – TG-50 (included)
Service Kit – TG-50 (208-220/240V-60H-1P-DOM)
Spare Parts Kit – TG-25 (included)
Service Kit – TG-25 (208-220/240V-60H-1P-DOM)
Service Kit – TG-25 (415/240V-50H-3P-CE)
Service Kit – TG-50 (400/230V-50H-3P-CE)
Heater Assembly - Glaze Tank TG-50
Thermolizer (order service kits separate)
Cover; Glaze Tank – TG-50 (included except 22010)
Oven Mod. Kit & Lincoln Oven Parts (208V-60H-1P-DOM)
Oven Mod. Kit & Lincoln Oven Parts (240V-60H-1P-DOM)
Oven Mod. Kit & Lincoln Oven Parts (400/230V-50H-3P-CE)

08/19/05

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Installation

3
Venting:

WARNING
To avoid electrocuting yourself or damaging
the Thermoglaze, never allow water, steam,
cleaning solution, or other liquid to enter the
electrical panels or connections

Electrical:
Model

Dimensions

Power Requirements

TG21586

88"L x 40W x
63"H

See data tag

Local codes prevail. The authorities having
jurisdiction are stated in NFPA 96-1994
regarding requirements for the Thermoglaze.

Building Layouts:
Specification sheets and AutoCAD drawings for
use in developing architectural drawings can be
provided by request. Please call your Belshaw
Bros., Inc. representative for help in defining
your requirements.

Make sure that the power requirements of the
Thermoglaze, shown on the data plate, match
your power source.
Only plug in to power source that matches the
required voltage and current for the
Thermoglaze. (The Thermoglaze unit TG50
comes standard with a Hubbel 360P6W plug that
needs a 360C6W socket or equivalent for
electrical current.
Thermoglaze must be electrically grounded and
connected in compliance with the National
Electrical Code, ANSI-NFPA 70, and applicable
municipal building codes.
Do not apply electrical power to the system until
the assembly has been completed. See Section 4
for the assembly of the Thermoglaze.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Assembly

Clean all parts with mild soap and water and
let dry before assembly and applying
electrical power to the equipment.
The Thermoglaze unit is design for ease of
assembly and use. The system is crated in a
manner so there are few pieces to put together
once the Thermoglaze is in place for production.
After unpacking the system per the uncrating
instructions, 2 items need to be placed on the
Thermoglaze to finish assembly, the glaze trough
and the heat shield. First, the Glaze trough slips
into the 2 holes on either side of the drain tray
with the waterfall headed toward the oven. See

figure 4-1 and 4-4 for help setting the trough in
place. After the trough is in place attach the glaze
hose to the trough by pushing it in the hose
mount in the center of the trough. Second is the
Heat Shield over the oven portion of the
Thermoglaze. Slip it over the oven using the
handles provided until the guard locks over the
back of the oven. See figure 4-1 for a photo of
the location of the heat shield.
To help familiarize you with your Thermoglaze,
please study the following photographs:

Figure 4-1 Front view:
Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Transfer
Conveyor
Assembly

Figure 4-2 Infeed – Left hand view.

Figure 4-3 Swing away glaze trough.
(Optional)

Figure 4-4 Right Hand View:

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Figure 4-5 Control Panel View:
The Thermoglaze system consists of a Thermoglaze
unit and the Thermolizer. They are placed in unison
in the area located for the production of donuts. See
Figure 4-6 for Thermoglaze system.

Figure 4-6 Thermoglaze System.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Operation
•

Turn on main power switch and allow to heat
to operating temperature. (Note: conveyor
will not move until the oven is up to
operating temperature and the donut
ready light is on. See Figure 5-1.)

using the on switch located on the main
control panel.
•

After the donuts are thawed, place a screen of
donuts from Thermolizer box to the infeed
end of the Thermoglaze conveyor and allow
the screen to travel through the oven and
glazer. This takes approximately 3 minutes.

•

When the screen of donuts is through the
glazer and stopped forward travel, place the
glazed product on a rack for cooling using
the 2 delrin tray grips provided with the unit.

WARNING
To avoid burning yourself, never touch the
Thermoglaze unit, conveyor, or interior of the
oven while the machine is in use.

Figure 5-1. Oven Ready Light.
•

Turn on the Thermolizer and heat for 30
minutes to allow it to reach operating
temperature. See Thermolizer manual for
more operating instructions.

•

Load glaze reservoir with 40 pounds (one
large bucket) of glaze and turn on the glaze
pump.

•

To swing the glaze trough back, turn off
glaze pump, lift up on the mount slightly and
rotate to the trough to the rear. (Optional
Equipment) See Figure 4-3.

•

WARNING
Thoroughly clean and dry the floor if water or
other materials are spilled. Materials spilled
on the floor may cause serious injury and loss
of life.

WARNING

Conveyor will automatically start when
Thermoglaze reaches operating temperature.

Do not operate glazer without glaze or water
in the pump. Doing so may cause permanent
damage to the pump.

CAUTION!

After the donuts have been in the
Thermolizer for at least 20 minutes (60
minutes for filled product), turn on glazer

Donut screens are hot after coming out of the
glazer and will burn you if you grab them
without the handles.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Cleaning

Daily TG Cleaning
Instructions
Disassembly
1. Allow the Thermoglaze to completely
cool. (All material must under 130º)
2. Pump the unused glaze back into a bucket.
3. Disconnect the TG from power!
4. Remove the glaze trough.
7. Remove the oven heat shield.

5. Remove the drive belt.
8. Disconnect the conveyor drive coupling.

6. Remove the glazer drain tray.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze

MN-544EN

9. Remove the conveyor assembly through
the outfeed end of the oven.

10. Turn the end cover latches
counterclockwise.

11. Remove the end covers.

12. Lift up on the outfeed upper finger housing and
slide it to the rear of the oven disengaging it
from the mounting bracket.

13. Lower the end of the finger assembly.

14. Pull the finger assembly off the duct on the back
of the oven and remove it.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

15. Lift up on the outfeed lower finger
assembly and remove it.

18. Remove the infeed upper finger assembly.

19. Remove the infeed finger assembly.
16. Lift up on the infeed upper finger
assembly.

17. Slide the infeed upper finger assembly to
the rear of the oven.

20. Lift up on the outside end of the upper air duct
panel.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

21. Remove the upper air duct panel

24. Remove the oven crumb tray

22. Lift up on the outside end of the lower air
duct panel.

25. Oven with all parts removed.

23. Remove the lower air duct panel.

26. Insert flat tip screwdriver into finger
assembly if it cannot be removed by hand.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

27. Remove the finger cover.

30. Remove the lower glaze hose clamp and
gasket.

28. Remove the columnating plate.
31. Remove the upper pump clamp.

29. Loosen the lower glaze hose clamp.
32. Lift the glaze reservoir and remove the gasket

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

33. Remove the glaze reservoir and hose.

36. Remove the glaze pump cover and “O” ring.

34. Remove the drip pan.

37. Remove the glaze pump body.

35. Remove unscrew the 4 glaze pump cover
wing nuts.

38. Insert a flat tip screw driver into the slot to
loosen the pump body if it can not be
removed by hand.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

39. Remove the pump body and impellers.

40. Remove the impellers from the pump body.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Cleaning
1. Hand wash all parts of the oven and
glazer with warm soapy water.
2. Do not use caustic cleaners on oven parts.
3. You may use an approved oven cleaner
on the stainless steel finger cover only.
(see step 27 of Disassembly)
4. Do not use oven cleaner on any other part
of the oven or glazer!
5. Do not hose/spray down any part of this
machine.

2. Install the drive gear impeller. Line up
the flat on the shaft with the flat in the
impeller.

6. Glaze pump body and parts.
3. Install the lay gear impeller.

CAUTION
Failure to properly clean or lubricate glaze
pump may cause damage to the pump gear
impellors.

Assembly
NOTE
Lubricate the pump body, shaft “o” ring and
gear impellors with food grade mineral oil.

1. Install the glaze pump body.

4. Install the “O” ring into the glaze pump
cover. Make sure it stays in place and you
do not pinch it between the pump and
cover. The “O” ring may need to be
stretched before installing.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

5. Install the 4 wing nuts finger tight.

8. Install the upper clamp.

6. Set the upper gasket on top of the glaze
pump.

9. Install the lower gasket, hose and clamp.

10. Install the columnating plates.
7. Install the drip pan and glaze reservoir.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

11. Install the finger covers.

14. Install the upper air panel assembly.

12. Install the oven crumb tray.

15. Install the lower infeed finger assembly.

13. Install the lower air duct panel.

16. Install the upper infeed finger assembly
by slipping it over the duct on the back of
the oven.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

17. Then lift it up, slide it to the front of the
oven and hook it on the brackets.

20. Install the infeed end cover by lining up
the slots at the bottom of the end cover
with the brackets on the oven and push in
on the latches and turn clock wise.

18. Install the lower outfeed finger assembly.
21. Install the outfeed end cover same as the
infeed.

19. Install the upper outfeed finger assembly.

22. Insert the conveyor through the outfeed
end of the oven.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

23. Pull the drive coupling back and line it up
with the conveyor drive shaft.

26. Install the glaze drain tray.

27. Connect the drive belt.
24. Install the glaze reservoir cover

28. Set the heat shield on top of the oven.

25. Glaze reservoir installed.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

29. Slide the heat shield over the oven.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Maintenance

The ThermoGlaze is engineered to need little
maintenance. By keeping the system clean, the
equipment will last for years. The only
maintenance that is required is the following:
When cleaning the donut system, check all
rubber gaskets for wear and replace when
necessary. Check for wear on impellers of the
glaze pump, replace when necessary. .
DO NOT spray machine with water or cleaning
agents to clean. Only wipe main unit off with
damp cloth.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Troubleshooting
Call Belshaw Bros. at (206)322-5474, or (800)
578-2547. One of our customer support
representatives will be happy to help you. When
you call, please specify the following:
•

The model name of the machine.

•

The serial number of the machine.

•

The voltage, phase, and hertz (cycle) of
the machine. This information can be
found on the small, rectangular data
tag/plate.

8
Following is a troubleshooting chart to help you
identify and solve some basic problems.

WARNING
Disconnect the machine from the power
source before disassembling, repairing, or
wiring.

CAUTION
If you perform repairs yourself or have them
performed by anyone other than Belshaw
Bros. or a service technician authorized by
Belshaw Bros., you do so at your own risk.

NOTE
See page 31 of the Maintenance Appendix for
oven troubleshooting.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

CONVEYOR WILL NOT MOVE
Possible Causes

What To Do

Oven not to correct temperature yet.

Wait until the oven comes to temp.and the ready
light comes on.

Conveyor is jammed.

Check for obstruction in conveyor and remove.

Motor circuit breaker is tripped.

Push the black circuit breaker reset at bottom of
oven control panel.

GLAZER WILL NOT PUMP GLAZE
Glazer motor is not running.

Check to make sure the motor is running.
(See Pump Motor Will Not Run)

Glazer pump impellers are worn.

1. Disconnect power.
2. Replace impellors.

GLAZE IS MISSING THE DONUTS ON ONE SIDE OF THE GLAZE SCREEN
Glazer or glaze trough is not level.

Adjust level of glaze trough by moving set collar.

Glaze pump is running too slow.

1.
2.
3.
4.

Disconnect from power.
Open Electrical Enclosure.
Turn glazer speed control clockwise.
Close Electrical Enclosure.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

THE PUMP MOTOR WILL NOT RUN
Possible Causes

What To Do

The connection of the power cord to the power
source is faulty.

Make sure the power cord is fully plugged in to a
proper power source.

The circuit breaker has been tripped.

1.
2.
3.
4.

Disconnect from power.
Open electrical enclosure.
Reset circuit breaker.
Close electrical enclosure.

THE FILL HOSE IS LEAKING
Possible Causes

What To Do

Fill hose is leaking at the connection.

Hose bracket needs adjusting or tightening.

Fill hose is leaking near the pump.

Check for missing or damaged o-ring.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Calibration Procedure for Temperature and Cook Time on
the Thermoglaze Model TG50
Turn off power to the TG50 before removing any
access covers. This procedure should be
performed only by qualified service technicians.
Remove the electrical box cover on the oven to
access the temperature and speed control
adjustment potentiometers. The following is a

photo of the location of the adjustment
potentiometers for the temperature and cooking
time for the Belshaw TG50 Thermoglaze.

Temperature
Adjustment

Speed Control
Adjustment

Speed control/cook time
adjustment:

Temperature Adjustment:

Turn on the oven and allow it to heat for 30
minutes.
Put a glaze screen on the conveyor chains that
run through the oven. With the oven in operation,
time the leading edge of the screen as it enters
the oven until the leading edge just leaves the
exit end of the oven. Adjust the potentiometer
until the desired time/speed is found. To increase
the cook time, turn the potentiometer clockwise.
To decrease the cook time, turn the
potentiometer counterclockwise. The factory
setting for cook time for the TG50 is 1 ½
minutes.

Measure the temperature from the lower baffle
on the exit end of the oven. Place a thermocouple
in the hole located on the baffle, 3rd row from the
outside, 3rd hole from the back side of the oven.
Note: The back side of the oven has a fan motor
extended from it. Adjust the temperature by
rotating the potentiometer located to the right of
the speed control, clockwise increases the
temperature, and counterclockwise decreases the
temperature. The factory setting is 400º F.

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Appendix

Final Assembly Drawing

TNG-2011

Parts Diagrams

TNGG-1008
TNGG-0526
TNGG-1009
TNGV-2004

Wiring Diagram

TNG-4008

Maintenance Appendix for ThermoGlaze Oven
Service Kit Parts List

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

TNG-2011. THERMOGLAZE ASSEMBLY

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

TNG-2011. THERMOGLAZE ASSEMBLY

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

TNG-2011. THERMOGLAZE ASSEMBLY

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

TNG-2011. THERMOGLAZE ASSEMBLY

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

TNG-2011. THERMOGLAZE ASSEMBLY

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

Thermoglaze 50

MN-1716EN

SK-1258 R5
REC. QTY

PART NUMBER

DESCRIPTION

THERMOGLAZE
1 EA
1 EA
1 EA
5 EA

#RLY-0008
#SWT-0022-240
#TDR-0015
905-0242-7/8

5 FT
2 EA
4 EA
1 EA
1 EA
1 EA
1 EA
4 EA
2 EA
2 EA
4 EA
2 EA
1 EA

905-0408-58
GL100-0116
GL100-0171
HG18-0031-4
HG18-0031B-4
TNGG-0034C
TNGG-0034D
TNGG-0034M
TNGG-0034T
TNGG-0034Z
TNGT-0009
TNGT-0079
TNGT-0080

2 EA
2 EA
2 EA
1 EA
2 EA

TNGT-0082
TNGT-0167
TNGT-0169
TNGT-0171
TNGV-0060

RELAY (240V)
ILLUMINATED ROCKER SWITCH
TIME DELAY RELAY
HD SPRING PIN, 1/8 DIA X 7/8" LG
1 1/2 ID SUCTION HOSE (SPIRILITE) 58"
LG.
GLAZE TUBE CLAMP
GASKET
CASTER 4"
CASTER W/BRAKE 4"
DRIVE GEAR
LAY GEAR
WING NUTS, PUMP COVER
COVER O-RING
PUMP O-RING, SHAFT
SPACER, DELRIN, WHITE
BEARING BLOCK, TRANSFER SHAFT
TRANSER SHAFT
TRANSFER SHAFT DRIVE BELT,ORANGE
REPL. CHAIN ASS'Y
IDLER SPROCKET, 38B10
CONVEYOR DRIVE SHAFT, OUTFEED
TRAY GRIP

Belshaw Bros., Inc. • 1750 22nd Ave. S. • Seattle, WA 98144 • Phone 206-322-5474 • Fax 206-322-5425

MN-1716EN

Thermoglaze 50

TROUBLESHOOTING GUIDE
IMPINGER CTI
SYMPTOM
Oven fan will not run

POSSIBLE CAUSE
Incoming Power Supply

Oven Fan Fuses, 5 Amp
Fuse Holder
High Limit Thermostat
Control Box (Note: High
Limit not used in ovens
S/N 3000352)
Fan Switch
20 Minute Time Delay

Main Fan Relay
Fan Motor
Capacitor
No main fan cool
down

20-Minute Timer

Main fan continues to
run after cool down

20 Minute Timer

No control box
cooling

Fan Switch
20 Minute Timer
Cooling Fan

November 1999

EVALUATION
Check breakers, reset if required Check power plug
to be sure it is firmly in the receptacle (if applicable).
Measure the incoming power, call Power Co., if
needed
Check and/or replace
Check and/or replace
Check for voltage on both sides of the switch.
Terminals are normally closed. If open, reset and
test oven for proper operation. If thermostat and
below.) will not hold and control box temperature is
not exceeding 140°F (60°C), replace thermostat.
Check continuity between switch terminals. Check
and insure good wire connections
Check for supply voltage at terminal #1 to ground on
the 20-minute timer. If no voltage is present, trace
wiring back to power supply. If voltage is present at
terminal #1, check for supply voltage at terminal #2 to
ground. If no voltage is present, and the oven fan
switch is closed, replace the 20-minute timer.
Check continuity of coil. Check for power to relay
coil. Visually check for contact pull in and contact
condition. Check for voltage across relay terminals.
Check for opens, shorts, or grounds. WITH POWER
OFF: Turn fan blade to check for locked rotor.
Check for opens, shorts, or grounds. WARNING
Capacitor has a stored charge, discharge before
testing.
Check for supply voltage at terminal #2 and #3 while
main fan is running. Turn off fan switch and supply
voltage should continue to be present for 20 min. at
terminal #2. Replace as needed.
NOTE: On/Off operation of fan switch will reset timer
to 20 minutes. If timer is accidentally reset, turn off
main breaker to cancel. If voltage continues to be
present at terminals 2 and 3 after 20 minutes, verify
fan switch contacts have opened, replace timer as
needed.
WITH POWER OFF: Close switch and check for
continuity across switch terminals.
See "Main Fan Motor will not run."
Check for voltages at the fan motor, if present,
replace defective fan motor.

COUNTER TOP IMPINGER

Oven will not heat

Main Oven Fan
Temperature Control
Board

Thermocouple Sensor

Temperature Set
Potentiometer

Hi Limit ThermostatOven Cavity

Air Pressure Switch

Heating Element Relay

Heater Element

November 1999

Check if main oven fan is working. If not, refer to
"Oven Fan Will Not Run".
Check for voltage input at the board. Turn the
temperature adjustment knob to the maximum
temperature position and check for voltage at the load
terminal. If present, and unit is not heating, refer to "Air
pressure switch" for next check. If no voltage is
present, proceed.
Check terminals, wiring, and proper location of the
sensor bulb. It must be in its spring holder located in
the inside, rear, lower right hand corner (viewed from
front) behind Finger #4. The thermocouple is a type J
and has one red lead (Neg.) and one white lead
(Pos.).WITH POWER ON AND THERMOCOUPLE
LEADS ATTACHED TO THE TEMPERATURE
CONTROL BOARD: Measure the D.C. millivolt output
of these leads. Refer to thermocouple chart in Section
D for proper readings. If these readings are not
achieved, replace the thermocouple.
Disconnect the potentiometer leads from the board.
Place ohm meter test leads on the blue and green pot.
leads. Reading should be 1 K ohms. Place meter leads
across the blue and purple pot. leads and rotate knob
from high to low. Repeat on green and purple leads.
Check for even rise and fall of ohms reading to insure
that there are no open or dead spots in the
potentiometer. Check each lead to ground for shorts.
Replace Pot. if it does not meet the above test.
Terminals are normally closed, open at 660°F (350°C).
If open, push in reset button and retest. If thermostat
will not hold for maximum oven temperature, and oven
is not exceeding temperature dial setting, check for
proper location of capillary bulb in its spring holder. If
above checks okay, replace hi-limit thermostat.
Check for voltage on both sides of the switch, if voltage
is present on one side only, check for air tube
blockage, adjust air switch, if above fails, replace
switch.
Check for voltage to the Relay coil and contacts. If
voltage is present and contactor will not activate,
replace the contactor. Check for voltage across relay
terminals.
Check the amperage draw on each hot leg for proper
load. Check the rating plate for rating information. If
amp draw is low or high, check element for opens and
shorts.

COUNTER TOP IMPINGER

Conveyor will not run
S/N 4000480 and Below

Fan Switch
Conveyor Control
Transformer
Speed Adjustment
Potentiometer

Conveyor Control Board

Conveyor Gear Motor

Conveyor

Conveyor speed
varying or intermittent

Power Supply
Transformer
Conveyor Control

D.C. Gearmotor

November 1999

Check continuity between switch terminals. Replace
as needed.
Check for supply voltage at primary of transformer. If
no voltage is present, trace wiring back to fan switch.
Check for 24VAC at transformer secondary. If no
voltage is present, replace transformer.
This is a 5K ohm potentiometer. WITH POWER OFF:
Remove the leads from the motor control board at
terminals P1, P2, P3. With a digital meter, check the
ohm reading across the red and black leads. This
reading should be 5K ohms (± 10%) as the pot. is
rotated from low to high. Place meter leads on red
and white lead. Rotating the pot. slowly from low to
high, the meter reading should show an even
transition from 0 to 5K ohms (± 10%). There should
be no dead or open spots throughout the rotation of
the pot. Check all three (3) leads to ground. There
should be no continuity to ground. If any of the above
checks fail, replace the pot.
Check for 24 VAC input to conveyor control. If no
voltage is present, trace wiring back to transformer. If
voltage is present at L1 and L2, check for D.C. output
at terminals A+ and A-. If there is AC voltage input,
but no D.C. voltage output, replace conveyor control
board.
If there is D.C. voltage output from the conveyor
control, but the motor does not run, check the minibreaker (0.7 Amp). Check motor leads for opens,
shorts or continuity to ground. If motor fails above
test, replace motor.
Check conveyor drive coupling to be sure that it is
tight. Also check to see that coupling is engaged with
conveyor drive shaft. Check for any mechanical
misalignment or improper adjustment, also check for
worn bearings. A conveyor belt that is too tight will
cause excessive bearing wear and sometimesirregular speed.
Check for steady supply voltage to oven. If voltage is
unsteady, contact power company.
Check for steady A.C. voltage output from transformer
and replace as needed.
Check for steady D.C. voltage output from conveyor
control. If D.C. voltage output is unsteady, check
conveyor potentiometer (see "Speed Adjustment
Potentiometer" under Conveyor will not run). If the
potentiometer checks good, and the D.C. voltage is
unsteady, replace conveyor control.
Check motor brushes for excessive arching and/or
unusual wear. Replace brushes or gearmotor as
needed.

COUNTER TOP IMPINGER

Conveyor will not run
(S/N 3000481 & Above)

Fan Switch
Conveyor Control
Transformer
Speed Adjustment Pot

Conveyor Control
Board

Conveyor Gear Motor

Conveyor

Conveyor speed
varying or intermittent

Power Supply
Transformer
Conveyor Control

D.C. Gearmotor
Magnet
Hall Effect Sensor

November 1999

WITH POWER OFF: Check continuity between switch
terminals. Check and insure good wire connections.
With the fan switch on, check for supply voltage at the
primary of the transformer. Check for voltage on the
secondary side of transformer (24 VAC) at J4 and J5 on
the conveyor control board. Replace as needed.
This is a 50 K ohm potentiometer. WITH POWER OFF:
Remove the leads from the motor control board at
terminals P1, P2, P3. With a digital meter, check the
ohm reading across the red and black leads. This
reading should be 50K ohms (± 10%) as the pot. is
rotated from low to high. Place meter leads on red and
white lead. Rotating the pot. slowly from low to high, the
meter reading should show an even transition from 0 to
50 K ohms (±10%). There should be no dead or opens
spots throughout the rotation of the pot. Check all three
(3) leads to ground. There should be no continuity to
ground. If any of the above checks fail, replace the pot.
Check for 24 VAC input to the control board at terminals
J4 and J5. If not present, check wiring back to control
transformer, if voltage is present at J4 and J5, check the
VDC output at terminals J2 (+) & J3 (-) (0-18 VDC). If
24 VAC is present at J4 and J5, but VDC is not present
at J2(+) & J3(-) replace board.
If D.C. voltage is present at J2(+) and J3(-) and the
motor does not run, first check the mini breaker (.7Amp).
Check the leads to the motor for evidence of any shorts
or opens, and each lead to ground. If the motor fails the
above tests, replace motor.
Check for any mechanical misalignment or improper
adjustment, also check for worn bearings. A conveyor
belt that is too tight will cause excessive bearing wear
and sometimes, irregular speed.
Check for steady supply voltage to oven. If voltage is
unsteady, contact Power Company.
Check for steady AC voltage output from transformer
and replace as needed.
Check for steady D.C. voltage output from conveyor
control. If D.C. voltage output is unsteady, check
conveyor potentiometer (See Speed Adjustment
Potentiometer" under Conveyor will not run). If the
potentiometer checks good, and the D.C. voltage is
unsteady, replace conveyor control.
Check motor brushes for excessive arching and/or
unusual wear. Replace brushes or gearmotor as
needed
Check to insure that the magnet (cemented to shaft of
conveyor drive motor) has not been damaged, or come
loose from motor shaft. Replace as needed.
Check for any physical damage to Hall Effect Sensor
(mounted on conveyor motor). Check all wiring and
connections or damage. Check all connections for
tightness or proper location and check all wiring or
visible damage. Replace as needed.

COUNTER TOP IMPINGER

REMOVAL, INSTALLATION, AND ADJUSTMENT
MODEL SERIES 1300

CAUTION!
BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER
OVEN BE SURE TO DISCONNECT ELECTRICAL POWER SUPPLY
SWITCH, ON-OFF
1.
2.
3.
4.
5.

Remove conveyor and oven side panels.
Remove two (2) screws from ends of control panel and remove panel.
Disconnect four (4) wires from switch assembly. Mark wires for reinstallation.
Depress clips on side of switch and remove from panel.
Reassemble in reverse order and check operation.

POTENTIOMETER, CONVEYOR CONTROL
1.
2.
3.
4.
5.
6.

Remove conveyor and oven side panels.
Remove two (2) screws from ends of control panel and remove panel.
Unplug potentiometer at the wire harness (push on connectors).
Loosen set screws on control knob and remove knob.
Remove retaining nut from potentiometer shaft and remove pot.
Reassemble in reverse order and check operation, recalibrate if needed.

POTENTIOMETER, TEMPERATURE CONTROL
1.
2.
3.
4.
5.
6.

CIRCUIT BREAKER, 0.7 AMP
1.
2.
3.
4.

Remove control box cover.
Remove two (2) wires from mini-breaker.
Remove knurled nut and remove breaker.
Reassemble in reverse order and check operation.

FUSE HOLDER
1.
2.
3.
4.

Remove control box cover.
Remove two (2) wires from fuse holder.
Remove two (2) screws and remove holder.
Reassemble in reverse order and check operation.

November 1999

COUNTER TOP IMPINGER

THERMOSTAT, OVEN CAVITY HI-LIMIT
1.
2.
3.
4.
5.

Remove control box cover.
Remove oven back assembly. (See OVEN BACK)
Remove two (2) wires from thermostat.
Remove retaining nut from the front of thermostat and remove thermostat.
Remove capillary tube from wire form in back of oven and remove assembly out through control
box side.
6. Reassemble in reverse order. Check for proper routing through insulation. Be sure capillary tube is
held securely in the wire form and the reset button has been pushed in and set.
NOTE: All excess capillary tubing should be brought back into control box area. Be certain to
replace insulation seal when oven back is re-installed.
7. Check operation.
AIR PRESSURE SWITCH - REPLACEMENT
1.
2.
3.
4.
5.

Remove control box cover.
Remove two (2) wires.
Remove air tube (note location).
Remove four (4) screws and replace air switch.
Reassemble in reverse order and check operation.
NOTE: Make sure to use rubber grommets when installing air switch.
ADJUSTMENT SCREW

AIR PRESSURE SWITCH - ADJUSTMENT
1. Apply power to oven, turn temperature control potentiometer to max. and allow 30-minutes preheat
for temperatures to stabilize.
2. Remove air tube and with a volt meter verify that contactor for heater elements opens.
3. WITH POWER ON: Re-connect tube and check voltage across the air switch making sure that
there is no voltage drop and it remains steady. Adjust as needed. (See Picture, verify adjustment
screw has not vibrated out).
NOTE: Allow 30 minutes preheat.
THERMOSTAT, CONTROL BOX HI-LIMIT
1.
2.
3.
4.

Remove control box cover.
Remove two (2) wires.
Remove two (2) screws and replace
Reassemble in reverse order and check operation.
NOTE: Make sure reset button has been pushed and set.

November 1999

COUNTER TOP IMPINGER

MAIN FAN RELAY
1.
2.
3.
4.

Remove control box cover
Remove wires from relay and mark wires for reinstallation.
Remove two (2) screws and replace relay.
Reassemble in reverse order and check operation.

TIME DELAY RELAY
1. Remove control box cover.
2. Remove wires from relay and mark wires for reinstallation. CAUTION: Resistor should be
jumpered across terminals #2 and #3 on some of the early models (SN 3000352 and below) this
jumper was installed across terminals #1 and #3 which may cause failure of the timer. Correct
when replacing timer.
3. Remove screw and replace relay.
4. Reassemble in reverse order and check operation.
NOTE: Do not overtighten mounting screw as this could damage timer.
RELAY CONTACTOR
1.
2.
3.
4.

Remove control box cover.
Remove wires and mark wires for reinstallation.
Remove four (4) mounting screws and replace contactor.
Reassemble in reverse order and check operation.

TRANSFORMER - CONVEYOR
1. Remove control box cover.
2. Disconnect wires from primary and secondary of transformer. Mark wires for reinstallation (#23-blue208V connection/#24-red-240V connection).
NOTE: Wire nut one not being used.
3. Remove two (2) mounting screws and replace.
4. Reassemble in reverse order and check operation.
CONVEYOR DRIVE MOTOR
1. Remove conveyor (see Installation and Operations Manual).
2. Remove screw from center of coupling sleeve assemby. and slide coupling assembly off motor
shaft.
3. Remove control box cover.
4. Disconnect motor leads and mark wires for reinstallation and conveyor direction.
5. Remove four (4) motor mounting screws and replace motor.
6. Reassemble in reverse order and check operation.
NOTE: Check to insure coupling and conveyor shaft are aligned.
NOTE: Starting with SN 3000481 all conveyor drives will be a closed loop system. The drive
motor assembly will include a hall effect sensor board and magnet. No calibration required.
S/N 3000480 and Below--Check calibration of conveyor control board (See
calibration")

"Conveyor control board

S/N 3000481 and Above--Attach correct magnet to conveyor motor assembly.

November 1999

COUNTER TOP IMPINGER

ASSEMBLY OF MAGNET TO MOTOR
FOR OVENS WITH 1-12 MINUTE CONVEYOR DRIVE SYSTEM
1. Apply 1 or 2 drops of adhesive (supplied) to magnet. Mount magnet on motor shaft. Be sure
to keep adhesive away from motor bearings.
Note: Use magnet marked "8"
FOR OVENS WITH 1-24 MINUTE CONVEYOR DRIVE SYSTEM
1. Apply 1 or 2 drops of adhesive (supplied) to magnet. Mount magnet on motor shaft. Be sure
to keep adhesive away from motor bearing.
Note: Use magnet marked "16"
CONVEYOR CONTROL BOARD - REPLACEMENT
1.
2.
3.
4.
5.

Remove control box cover.
Disconnect and mark all wires from the control board.
Remove two (2) screws from mounting bracket at rear wall and remove assembly.
Depress nylon clips and remove circuit board from mounting bracket.
Reassemble in reverse order and check operation.

CONVEYOR CONTROL BOARD CALIBRATION (S/N 3000480 AND BELOW)
(NOTE: S/N 3000481 & ABOVE, NO CALIBRATION REQUIRED)
1.
2.
3.
4.
5.

Remove control box cover.
Connect digital meter to A+ & A-.
With conveyor running at maximum speed, adjust max pot on board to 21.5 to 22 VDC.
With conveyor running at minimum speed, adjust min pot on board to 3 to 4 VDC.
Check conveyor belt timing (leading edge in to leading edge out) at 5 min. and adjust,
potentiometer knob if necessary to compensate (S/N 3000481 & above, no calibration required).

ELECTRONIC TEMPERATURE CONTROL BOARD - REPLACEMENT
1.
2.
3.
4.
5.

Remove control box cover.
Disconnect wires and molded connector and mark wires for reinstallation.
Remove two (2) screws from mounting bracket and remove assembly.
Depress nylon clips and remove circuit board from mounting bracket.
Reassemble in reverse order and check operation.

ELECTRONIC TEMPERATURE CONTROL - CALIBRATION
1. Turn oven on, allow 30 minutes preheat for temperatures to stabilize in oven cavity.
2. Remove control box cover.
3. Place temperature probe in bottom finger #4 (lower right), 3rd row from outside edge, 3rd hole
from the rear.
NOTE: Make sure probe is not touching any metal surfaces. (Measure air temperature only)
4. Turn temperature control knob fully clockwise and adjust so the knob indicator is aligned with the
mark past 550°F (288°C) on the dial. (See diagram Pg. 13)

November 1999

COUNTER TOP IMPINGER

177C/350F

240C/400F
450F/232C

149C/300F

121C/250F

500F/260C

93C/200F

550F/288C

CALIBRATION MARK

TEMPERATURE
CONTROL BOARD

5. Turn the temperature control knob to 500°F (260°C) and calibrate the temperature control board.
Adjust the top potentiometer only (see diagram Pg. D5) so the unit cycles at 500°F ± 10°F (490°F 510°F).
6. Turn the temperature control knob to 550°F and verify that the oven will cycle at 550°F (288°C) ±
10°F.
7. Replace the control box cover and check operation.

CONTROL BOX
HI-LIMIT

AIR SWITCH

CONVEYOR
DRIVE MOTOR

TRANSFORMER

November 1999

COUNTER TOP IMPINGER

COOLING FAN, CONTROL BOX
1.
2.
3.
4.
5.

Remove control box cover.
Remove four (4) screws.
Lift off fan guard and finger guard.
Disconnect two wires and replace fan.
Reassemble in reverse order and check operation.
NOTE: Check to insure that control box high limit switch is not tripped. Reset if needed.

CAPACITOR, MOTOR
1. Remove six (6) acorn nuts from motor cover and remove.
CAUTION: DISCHARGE CAPACITOR BEFORE REMOVING.
2. Remove wires from capacitor and mark wires for reinstallation.
3. Loosen clamp around capacitor and remove.
4. Reinstall in reverse order and check operation.
OVEN BACK ASSEMBLY
1.
2.
3.
4.

Remove six (6) acorn nuts and remove motor cover.
Disconnect all wiring from motor and heating element.
Remove four (4) nuts holding oven back and remove oven back.
Reassemble in reverse order. NOTE: Be certain to replace insulation seal each time oven back
is removed.

MAIN FAN
1. Remove six (6) acorn nuts holding motor cover and remove.
2. Remove four (4) acorn nuts holding oven back assembly and remove.
3. Loosen two (2) screws on fan hub and slide fan off of motor shaft. (Note location of hub on motor
shaft for reinstallation. Approximately 3/16" from back wall.)
4. Reinstall in reverse order and check system operation. Allow 30 minute preheat and verify that
fan is not rubbing.
NOTE: Be certain to replace insulation seal each time oven back is removed.

November 1999

COUNTER TOP IMPINGER

THERMOCOUPLE
1.
2.
3.
4.
5.

Remove control box cover.
Remove six (6) acorn nuts holding motor cover and remove.
Remove four (4) acorn nuts holding oven back assembly and remove oven back.
Remove thermocouple bulb from wire form in rear of oven cavity.
Disconnect and mark wires from temperature control board (red=neg., white=pos.) and remove
thermocouple.
6. Reassemble in reverse order and check operation. NOTE: Be certain to replace insulation seal
each time oven back is removed.
INFORMATION:
When two wires composed of dissimilar metals are joined together and one of the ends is heated,
a continuous current flow is generated. We use an iron constant (Type J) thermocouple. The
iron wire increases the number of dissimilar junctions in the circuit.
It is possible to check a thermocouple with a properly calibrated D.C. millivolt meter. At 32°F, the
millivolt reading should be 0.00. This can be checked by inserting the thermocouple into an ice
bath. The millivolt reading at 72°F should be 1.134.
When using the following chart, the temperature at the terminal connections must be noted. This
temperature is called the Junction Temperature.
The following chart lists the thermocouple millivolt readings from 200°F to 600°F.
OVEN
JUNCTION TEMPERATURE

90°F
88°F
86°F
84°F
82°F
80°F
78°F
76°F
75°F
74°F
72°F
70°F
68°F
66°F
64°F
62°F
60°F

200°F
3.26
3.32
3.37
3.43
3.49
3.55
3.60
3.66
3.69
3.72
3.78
3.83
3.89
3.95
4.01
4.06
4.12

November 1999

250°F
4.77
4.83
4.88
4.94
5.00
5.06
5.11
5.17
5.20
5.23
5.29
5.34
5.40
5.46
5.52
5.57
5.63

300°F
6.30
6.36
6.41
6.47
6.53
6.59
6.64
6.70
6.73
6.76
6.82
6.87
6.93
6.99
7.05
7.10
7.16

TEMPERATURE

325°F
7.06
7.12
7.17
7.23
7.29
7.35
7.40
7.46
7.49
7.52
7.58
7.63
7.69
7.75
7.81
7.86
7.92

350°F
7.83
7.89
7.94
8.00
8.06
8.12
8.17
8.23
5.26
8.29
8.35
8.40
8.46
8.52
8.58
8.63
8.69

400°F
9.37
9.43
9.49
9.54
9.60
9.66
9.72
9.77
9.80
9.83
9.89
9.95
10.00
10.06
10.12
10.18
10.24

425°F
10.14
10.20
10.26
10.31
10.37
10.43
10.49
10.55
10.57
10.60
10.66
10.72
10.78
10.83
10.89
10.95
11.01

450°F
10.91
10.97
11.03
11.09
11.14
11.20
11.26
11.32
11.35
11.37
11.43
11.49
11.55
11.61
11.66
11.72
11.78

500°F
12.46
12.51
12.57
12.63
12.69
12.74
12.80
12.86
12.89
12.92
12.97
13.03
13.09
13.15
13.20
13.26
13.32

550°F
14.00
14.05
14.11
14.19
14.23
14.28
14.34
14.40
14.43
14.46
14.51
14.57
14.63
14.69
14.74
14.80
14.86

600°F
15.53
15.59
15.65
15.71
15.76
15.82
15.86
15.94
15.97
15.99
16.05
16.11
16.17
16.23
16.28
16.34
16.40

COUNTER TOP IMPINGER

HEATING ELEMENT (Color Coded on the Cold Zone)
PART# 369418
PART# 369419
PART# 369450
PART# 369455
PART# 369456
PART# 369457
PART# 369475
PART# 369476
PART# 369477
PART# 370104
PART# 370105
1.
2.
3.
4.
5.

Heating Element 208V
Heating Element 240V
Heating Element 220V
Heating Element 200V
Heating Element 380V
Heating Element 415V
Heating Element 200V 3 PH
Heating Element 380V 3 PH
Heating Element 415V 3 PH
Heating Element 400V 3 PH
Heating Element 400V 1 PH

Red
Blue
Yellow
Orange
Violet
Green
Orange
Violet
Green
Brown
Brown

Remove six (6) acorn nuts holding motor cover and remove
Remove connectors from element.
Remove four (4) acorn nuts holding oven back assembly and remove.
Remove three (3) screws from heating element brackets and slide element out of back assembly.
Reassemble in reverse order. Verify by color code, dot or band on element that correct element is
being installed. Refer to chart above:
NOTE: Be certain to replace insulation seal each time oven back is removed.

AIR PUMP
1.
2.
3.
4.
5.
6.
7.

Remove six (6) acorn nuts holding motor cover and remove.
Disconnect motor, capacitor, and element leads and mark wires for reinstallation.
Remove four (4) acorn nuts holding oven back assembly and remove.
Remove main fan. (Note location, approximately 3/16" from back wall on motor shaft.)
Remove heating element.
Remove five (5) screws from inner back assembly and lift off.
Loosen two screws on air pump hub and slide off shaft. (Note location for reinstallation
(approximately 3/64" clearance from back wall).
8. Reinstall in reverse order and check operation. Allow 30 minute preheat and verify that fan is not
rubbing.
NOTE: Be certain to replace insulation seal each time oven back is removed.
MAIN FAN MOTOR
1.
2.
3.
4.
5.
6.
7.

Remove six (6) acorn nuts holding motor cover and remove.
Disconnect motor, capacitor, and heating element and mark wires for reassembly.
Remove four (4) acorn nuts holding oven back assembly and remove.
Remove heating element (See "heating element removal").
Remove main fan, NOTE position ("See fan removal").
Remove five (5) screws from inner back and separate.
Remove air pump assembly
NOTE location.
8. Remove four (4) screws from motor mount pedestal and lift motor and pedestal off outer back
assembly.
9. Remove four (4) nuts from front motor studs and remove mounting pedestal.
10. Reassemble in reverse order and check operation.
NOTE: Be certain to replace insulation seal each time oven back is removed

November 1999

COUNTER TOP IMPINGER

GENERAL – 1300 SERIES
LETTER
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
JJ
KK
LL
MM
NN
OO

November 1999

P/N
369434
369442
369436
369445
369441
369439
369435
369438
369444
369446
369437
369916
369484
369407
369447
369953
369460
369410
370106
350259
369413
369373
369461
369945
369429
369432
369449
369433
369468
350224
369448
369467
369495
369211
369451
369491
369490
369488
369932
370096
370018
370095
370097

DESCRIPTION
Air Duct Panel, Upper
Finger Housing S/N 3002167 & Below
Columnating Plate #2 (UR) – S/N 3002167 & Below
Finger Cover, Upper Right – S/N 3002167 & Below
Finger Cover, Lower Right – S/N 3002167 & Below
Columnating Plate #4 (LR) – S/N 3002167 & Below
Air Duct Panel, Lower
Columnating Plate #3 (LL) – S/N 3002167 & Below
Finger Cover, Lower Left – S/N 3002167 & Below
Finger Cover, Upper Left – S/N 3002167 & Below
Columnating Plate #1 (UL) – S/N 3002167 & Below
Top / Front Cover Panel
Cover Panel Assy
Fastener & Split Ring Retainer
Cover Panel Assembly, Right
Flat Washer, S/S
Compression Spring
Coupling Sleeve
Flat Washer, .156 x .430
Screw, THMS 6-32 x 3/8
Drive Key
Receptacle, Snap-In
Leg, 4”
Control Panel
Knob, Control
Switch, On – Off
Temperature Control Pot. Assembly
Potentiometer Control, Conveyor S/N 3000480 & Below
Potentiometer Control, Conveyor S/N 3000481 & Above
Lens, Yellow
Cover Panel Assembly, Left
Pilot Light & Harness – S/N 3000481 & Above
Conveyor Baffle
Thumb Screw
Mounting Ring Assy.
Finger Cover – S/N 3002168 & Above (4 required)
Columnating Plate – S/n 3002168 & Above (4 required)
Finger housing – S/n 3002168 & Above (4 required)
Facia 1-12 Minute Bake Time
Facia 2-24 Minute Bake Time
Facia 1-24 Minute Bake Time
Control Guard
Screw 10-32 x ¼”

COUNTER TOP IMPINGER

GENERAL – 1300 SERIES PARTS BLOW-UP

November 1999

COUNTER TOP IMPINGER

CONTROL COMPARTMENT – 1300 SERIES
LETTER
A
B
C

P/N
369426
369378
369428
369331
369415
369464
370017

D
E
F
G
H
I
J
K
L

M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
BB
CC
DD
EE

November 1999

369431
369430
369422
369417
369425
369479
369427
370241
369416
369465
369129
369424
369923
369466
369841
369154
357067
369483
369482
369822
370065
369823
369421
370100
370040
370099
369414
370019
369536
369085
369376
369584
369698
369856
357107
369492
369131

DESCRIPTION
Cooling Fan – S/N 3000399 & Below
Cooling Fan – S/N 3000400 & Above
Finger Guard – S/N 3000399 & Below
Finger Guard – S/N 3000400 & Above
Conveyor Control S/N 3000480 & Below
Conveyor Control – S/N 3000481 to 3007663
Except Models 1301-5, 1302-5, 1304-5, 1308-5
Conveyor Control S/N 3007664 and Above and
All S/N for Models 1301-5, 1302-5, 1304-5, 1308-5
Thermostat, Control Box Hi-Limit S/n 3000352 & Above
Air Switch
Relay SPST, 240V
Time Delay Relay
Relay Contactor Single Phase
Relay Contactor 3 Pole 3 Phase
Transformer, Conveyor Control
Transformer, Conveyor Control Models 1312,1313,1314
Electronic Temperature Control S/N 3000480 & Below
Electronic Temperature Control S/N 3000481 & Above
Fuse Holder, Model 1300,1301,1302,1307
Conveyor Drive Motor S/N 3000480 & Below
Conveyor Motor Assy. Models 1301-5,1302-5,1304-5,1308-5
Conveyor Motor Assy (Assy. Includes Q,R)
S/N 3000481 & Above Except 1301-5,1302-5,1304-5,1308-5
Brushes (For 369466 Motor)
Circuit Breaker - .7Amp
Thermostat, Capillary
Housing Assy.
Fan Housing
Magnet, 8 Pole (For 1-12 Minute Conveyor System)
Magnet, 16 Pole (For 1-24 Minute Conveyor System)
Hall Effect Sensor
Fuse 5A, Model 1300,1301,1302,1307
Conveyor Motor Plate, Inner
Hall Effect Cable
Conveyor Motor Plate, Outer
Power Cord 30A S/n 3007818 & Below (Model 1301,1302)
Power Cord 50A S/N 3007819 & Above (Model 1301,1302)
Cooling Fan Cordset
Junction Box
Terminal Block 3 Pole
Terminal Block 4 Pole
Cover, Junction Box
Stand-off, Support
Fuseholder
Fuse 5A
Thermocouple

COUNTER TOP IMPINGER

CONTROL COMPARTMENT – 1300 SERIES BLOW - UP

November 1999

COUNTER TOP IMPINGER

BACK – 1300 SERIES
LETTER

P/N

369418
369419
369450
369455
369456
370105
369457
369475
369476
370104
369477
369409
369408
369440
369192
369457
370041
370020
370102
369453
369423
369485
370179
369480
369940
370093
369474
369936
369473
369935
369470
369497
369496
369459

B
C
D
E
F
G
H
I
J
K

L
M
N
O
P
Q
R
S
T
U

November 1999

DESCRIPTION
Color Coded on The Cold Zone
Heating Element - 208V
Red
Heating Element - 240V
Blue
Heating Element - 220V
Yellow
Heating Element - 200V
Orange
Heating Element - 380V
Violet
Heating Element - 400V 1 PH
Brown
Heating Element - 415V
Green
Heating Element - 200V 3 PH
Orange
Heating Element - 380V 3 PH
Violet
Heating Element - 400V 3 PH
Brown
Heating Element - 415V 3 PH
Green
Main Fan
Air Pump
Nut, S/S ¼ - 20
Capacitor
Nut, 10-32
Duct Assy
Motor Cover Assy
Bottom Cap, Flue Duct
Flue Duct Assembly
Motor, Main Fan S/N 3002137 & Below – All 1301-4,1302-4
Motor, Main Fan 60 Hz S/N 3002168 & Above
Motor, Main Fan 50 Hz – Models 1304-4,1305-4,1308-4
Motor, Main Fan 50 Hz S/n 3002168 & Above
Motor Mount
Motor Plate Assy
Insulation, Air Pump Panel
Plenum Barrier Panel
Insulation, Plenum Panel
Cover Plate, Plenum
Insulation Seal
Bracket, Thermostat, Left Side
Bracket, Thermostat, Right Side
Motor Cover Assy

COUNTER TOP IMPINGER

BACK – 1300 SERIES BLOW - UP

November 1999

COUNTER TOP IMPINGER

STANDARD CONVEYOR – 1300 SERIES
LETTER
A
B
C
D
E
F
G
H
I
J

November 1999

P/N
369443
369462
369515
369516
369463
369471
1343
1344
369412
369411
370185
1341
1342
370094

DESCRIPTION
Standard Complete Conveyor Assy. (31” Length)
Idler Axle
Drive Sprocket
Conveyor Bearing
Drive Axle
Roll Pin, 5/32 x 7/8”
Entry Shelf – 12”
Entry Shelf – 4”
Conveyor Splice Clip
Conveyor Belting
Conveyor Belting (1 foot section)
Exit Shelf – 12”
Exit Shelf – 4”
Conveyor Frame Assembly

COUNTER TOP IMPINGER

EXTENDED CONVEYOR – 1300 SERIES
LETTER
A
B
C
D
E
F
G
H
I
J
K
L
M
N

November 1999

P/N
369909
369462
369515
369516
369463
369471
369943
369412
369481
370185
369920
369921
369954
369922
1345
369489

DESCRIPTION
Extended Conveyor Assy. (49 ¾” Length)
Idler Axle
Drive Sprocket
Conveyor Bearing
Drive Axle
Roll Pin, 5/32 x 7/8”
Conveyor Frame, Extended
Conveyor Splice Clip
Conveyor Belting – Extended Conveyor
Conveyor Belting (1 Foot Section)
Retainer
Roller, Slider Bed
Pop Rivet S/S
Support Rod
Pan Stop
Crumb Pan Assembly

COUNTER TOP IMPINGER

Source Exif Data:

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Title                           : Microsoft Word - MN-1716EN Thermoglaze 50 0805.DOC
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Has XFA                         : No
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Belshaw Brothers Tg 50 Users Manual MN 1716EN Thermoglaze 0805

TG 50 to the manual d5cd2c28-b50e-4b67-9881-c47feef6ad88

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