TurboChef HhB User manual

HhB/HhB 2 Comparison Outline
Cosmetic Differences
The HhB 2 has redesigned skins, an ergonomically-designed
door handle, and a new keypad that includes number keys for
programming. See Figure 1, adjacent. The outer dimensions of
the HhB 2 are also slightly larger:
ORIGINAL HhB HhB2
Height 16.5′
′(419 mm) 17.4′ ′(442 mm)
with legs 20.5′′ (521 mm) 21.4′′ (544 mm)
Width 25.5′
′ (648 mm) 25.9′ ′(658 mm)
Depth 29.0′′ (737 mm) 29.2′′ (742 mm)
with handle 31.5′′ (800 mm) 31.7′′ (805 mm)
Cleaning Procedure Differences
Detailed cleaning instructions are provided with each oven, as
well as within the owner’s and service manuals. The information
below covers only the design differences that affect cleaning.
Single Filter
The original HhB incorporated two filters that were attached
to the back oven cavity wall via clips on hinges. The HhB 2
contains only one filter, which is easier to remove due to a
pivoting filter bracket. See Figures 2 and 3, adjacent.
No Drain System
The original HhB oven incorporated a lidded drain to help
filter debris into the drain pan beneath the cavity during deep
cleaning. The HhB 2 has a water-tight cavity and no drain pan
to better accommodate stacking.
Easier Top Jetplate Removal
For deep cleaning, removing the top jetplate is easier on the
HhB 2 than the original HhB. This is due to additional
clearance to the rear cavity wall.
No Door Removal for Deep Clean
The original HhB oven door could be removed for deep
cleaning. The HhB 2 door should not be removed unless by
authorized service personnel, and can be sufficiently cleaned
while it is attached to the frame.
Easier Cooling Fan Cover Removal
Deep cleaning requires removing debris from the rear cooling
fans. On the original HhB oven, the outlet cooling fan cover
was secured to the back panel via sheet metal screws. On the
HhB 2 oven, the cooling fan cover can be removed without a
screwdriver (Figure 4) for easier and more effective cleaning.
Figure 2: Original HhB Filters
DOC-1201 (A) / Page 1 of 5
Figure 3: HhB 2 Filter
Figure 4: HhB 2 Back Oven Panel
Filter
bracket
rotated
forward 45°
Grease filter
Cooling fan
cover
Filter clips
Grease filters
© 2009 TurboChef Technologies, Inc.
High-limit reset button
Figure 1: Original HhB / HhB 2

Operational Differences
There is no difference between the HhB and the HhB 2 in
cooking performance or standard operation (e.g., turning the
oven on, selecting a recipe, etc.). The differences detailed
below affect installation and non-standard operation only.
For detailed installation and operating instructions, see the
owner’s and service manuals.
Accessing Test Mode
The original HhB required the operator to simultaneously
press and hold the Down and Right arrow keys for 3 seconds
to access Test Mode. On the HhB 2, Test Mode can be
accessed by simply holding the Right arrow key for 1 second.
Accessing Edit Mode
The original HhB required the operator to simultaneously
press and hold the Up and Down arrow keys for 1 second to
access Edit Mode. On the HhB 2, Edit Mode can be accessed
by simply holding the Up arrow key for 1 second.
Accessing the Options Menu
The original HhB required the operator to simultaneously
press and hold the top-left and top-right soft keys for 5
seconds to access the Options Menu. On the HhB 2, the
Options Menu can be accessed by holding either the top-left
or top-right soft key for 1 second.
Number Keys
When editing a recipe or oven serial number, the original
HhB required the operator to press and hold the Up or
Down key to scroll through available characters. The HhB 2
utilizes the alpha-numeric keypad for editing the group
name, recipe name, cook time, and event settings in Edit
Mode, as well as the serial number in Test Mode.
Smart Card Reader Location
The original HhB smart card reader was located near the
front-right oven leg. To better accommodate oven stacking,
the HhB 2 smart card reader is located to the left of the
keypad. See Figures 5 and 6, adjacent.
High-Limit Reset Button Location
The original HhB high-limit reset button was located near
the front-right oven leg. To better accommodate oven
stacking, the HhB 2 high-limit reset button is located on
the back panel. See Figure 5, adjacent and Figure 4, page 1.
Oven Leg Removal for Stacking
Due to the location of the drain pan, smart card reader, and
high-limit reset button, the original HhB oven required the
oven legs to remain attached at all times. The HhB 2 oven
can be stacked with the legs either attached or removed.
NOTE: Kit number HHB-3229 must be used to ensure
proper and safe stacking.
NOTE: If stacking ovens on a cart, the legs must remain on
the bottom oven, utilizing kit number HHB-8206.
Figure 5: Original HhB Smart Card Reader and
High-Limit Reset Button Location
Smart card reader
High-limit
reset button
Figure 6: HhB 2 Smart Card Reader Location
DOC-1201 (A) / Page 2 of 5
Smart card
reader
HhB/HhB 2 Comparison Outline

Service Differences
Detailed servicing instructions are provided in the HhB and
HhB 2 service manuals.
Notable Part Location Changes
The smart card reader, high-limit thermostat, rack motor,
and fuses were relocated for easier serviceability and/or more
efficient oven operation/installation (Figures 4-12).
Multiple Fuse Configurations
The fuses on the original HhB oven were located on the back
panel. The HhB 2 oven fuses are located on a fuse block
behind the right-side panel and can be field-configured for
single or multiphase operation. See Figures 7 and 8, below.
Door Hinges
The hinges on the original HhB oven were secured to the
oven door, allowing for door removal during deep cleaning.
The hinges on the HhB 2 oven are secured to the oven
frame, and the right-side hinge actuates the door switch for
improved reliability. See Figures 9 and 10, below.
Door Switch
The door switch on the original HhB oven was either a
magnet or plunger-style switch, depending on the date of
manufacture. The original HhB switch (regardless of type)
was actuated by the door itself. The door switch on the HhB
2 is a paddle-style switch that is actuated by the right-side
hinge, improving the detection of the door position. See
Figure 10, below.
Figure 9: Original HhB Hinge
Figure 10: HhB 2 Hinge and Switch
Paddle-style switch
Switch actuated
by hinge
Hooks into frame
DOC-1201 (A) / Page 3 of 5
Figure 7: Original HhB Fuse Location
Figure 8: HhB 2 Fuse Location
Power cord
Fuses in positions 2
and 4 for single
phase operation.
Note: Fuses are
moved to positions 3
and 4 for multiphase
Wye, and to positions
1 and 2 for multi-
phase Delta.
Hinge assembly
HhB/HhB 2 Comparison Outline

DOC-1201 (A) / Page 4 of 5
Service Differences, Continued
One Eprom for All Electrical Configurations
The HhB 2 eprom can be used regardless of electrical
configuration, unlike the original HhB oven which had
different eproms for single or multiphase operation.
NOTE: The HhB 2 eprom is not backwards-compatible
with the original HhB.
Rack Motor Location and Installation
The rack motor on the original HhB oven was located on the
left side of the oven cavity, and was connected to the swing
arm assembly by a drag link. The rack motor on the HhB 2
oven is located on the right side of the oven cavity and is
connected directly to the swing arm. The elimination of the
drag link improves rack oscillation reliability. See Figures 11
and 12, below.
(Front of oven)
Rack motor attaches
to drag link
Drag link actuates
left swing arm
Figure 11: Original HhB Swing Arm Assembly
Rack motor attaches directly
to right-side swing arm
Figure 12: HhB 2 Swing Arm Assembly
NOTE: Oven components
removed for clarity
HhB/HhB 2 Comparison Outline

Service Part Comparison Matrix
DOC-1201 (A) / Page 5 of 5
Item Description HhB Item Number HhB 2 Item Number
Control Housing HHB-8025 HHB-8254
Cover, Outlet Cooling Fan HHB-8079 HHB-8281
Cover, Left Side HHB-8023-2 HHB-8271
Cover, Right Side HHB-8024-2 HHB-8272
Door Gasket HHB-8101 N/A
Door Handle HHB-8190 HHB-8240
Door Hinge, Left HHB-8084 (Receiver)
102807 (Hinge) 102805
Door Hinge, Right HHB-8084 (Receiver)
102807 (Hinge) 102804
Door Switch
102789 (Actuator)
HHB-3209 (Magnet kit)
HHB-3220 (Plunger kit)
102012
Drag Link Kit HHB-3201 N/A
Drain Pan 101091 N/A
Filter HHB-8114 (x2) HHB-8287
Filter Bracket HHB-8115 (x2) HHB-8288
Fuse Holder HHB-8136 (Cover)
100586 (Holder) 103548 (Fuse block)
Hole Plug, Oven Door N/A 101191
Inner Door Plate w/ Gasket HHB-8176 N/A
Keypad HHB-8064-1 HHB-8244
Line Voltage Harness 103022
HHB-8314 (Main HV)
HHB-8312 (Jumper)
HHB-8311 (Low V)
Screw, Side Cover (2.25”) 101663 N/A
Service Manual HHB-8707 HHB-8722
Smart Card Reader Cable 103023 100161
Software, Domestic HHB-8144-1 HHB-8243
Software, Dual TemperatureHHB-8144-3 HHB-8243-2
Software, International HHB-8144-2 HHB-8243
Stacking Bracket HHB-8165 HHB-3229 (kit)
HhB/HhB 2 Comparison Outline