Wells WVAE-30F Operating instructions

IMPORTANT: WELLS MANUFACTURING PROPRIETARY INFORMATION.
DISSEMINATION OF THIS INFORMATION TO ANYONE OTHER THAN
WELLS AUTHORIZED SERVICE AGENTS IS STRICTLY PROHIBITED.
TECHNICAL CONTENT OF THIS MANUAL IS DESIGNED FOR
USE BY QUALIFIED PROFESSIONAL TECHNICIANS ONLY.
PRINTED IN UNITED STATES OF AMERICA
WELLS BLOOMFIELD, LLC
2 ERIK CIRCLE, P. O. Box 280 Verdi, NV 89439
www.wellsbloomfield.com
telephone: [phone]
fax: [phone]
381
p/n 502944 Rev. E ECN-13391 S381 071128 cps
SUPPLEMENTAL
SERVICE INSTRUCTIONS
for
VENTILATOR HOOD
SECTION
FRYER MODELS
WVAE_30F
WVPE-30F
WVAE-55F
WVAE-55FS

BURN HAZARD
POSSIBLE HOT OIL SPILL
AVOID CONTACT WITH HOT OIL
USE CARE WHEN HANDLING OIL TO
AVOID SPILLS
Discharge of the Ansul® fire suppression system may result in foaming
of the oil in the frypot. Serious burns and other injuries can result from
contact with hot oil and from slipping in spilled oil. Clean up oil spills
promptly.
This ventilator hood system is designed as part of a fryer
intended to
prepare food for human consumption. No other use of this product is
authorized or recommended by the manufacturer or its agents.
This ventilator and attendant fryer are intended for use only in
commercial establishments, where all operators are familiar with
the appliance use, limitations and associated hazards. Operating
instructions and warnings must be read and understood by all
operators and users.
This ventilator hood system is designed to reduce odor emissions,
but will not completely eliminate cooking odors. Air exchange at the
installation site must comply with the requirements of the local
jurisdictional authority. To ensure that odors do not build-up,
recommended minimum air exchange is 400 cfm into and out of the
site.
Cleanliness of this appliance is essential to good sanitation. Read and
follow all included cleaning instructions and schedules to ensure the
safety of the food product.
Disconnect this appliance from electrical power before performing any
maintenance or servicing.
DO NOT splash or pour water on, in or over any controls, control
panel or wiring.
The technical content of this manual, including any wiring diagrams,
schematics, parts breakdown illustrations and/or adjustment
procedures, is intended for use by qualified technical personnel.
Any procedure which requires the use of tools must be performed by a
qualified technician.
This appliance is made in the USA. Unless otherwise noted, this
appliance has American sizes on all hardware.
WARNING:
RISK OF INJURY
Installation procedures must
be performed by a qualified
technician with full
knowledge of all applicable
electrical and plumbing
codes. Failure can result in
personal injury and property
damage.
WARNING:
SHOCK HAZARD
All servicing requiring
access to non-insulated
electrical components must
be performed by a qualified
technician.
DO NOT open any access
panel that requires the use
of tools unless you are
qualified to do so. Failure to
follow this warning can
result in severe electrical
shock.
CAUTION:
RISK OF
DAMAGE
DO NOT connect or
energize this appliance until
all installation
instructions are read and
followed. Damage to the
appliance will result if these
instructions are not followed.
PRECAUTIONS AND GENERAL INFORMATION
xi
381 502944 Service Manual for NFPA Hood

Precautions & General Information …………………………… xi
Features & Operating Controls …………………………………. 2
Hood Operation …………………………………………...……… 4
Troubleshooting Suggestions …………………………………… 6
Servicing Instructions
Fire Damper …………………………………………………… 7
Filter Interlock …………………………………………………. 8
Blower & Status Sensor System ……………………………. 10
Ansul® System ………………………………………………… 12
Exploded Views & Parts Lists ………………………………….. 14
Wiring Diagrams …………………………………………..……… 16
This manual contains information needed to properly service and repair the hood portion of ventless floor
fryers.
This manual applies to the following Wells Manufacturing models:
WVAE-30F, WVPE-30F, WVAE-55F, WVAE-55FS
This hood system is common to several Wells Manufacturing products. For installation, operation and
maintenance instructions, electrical specifications and general dimensions, refer to the General Layout
Data, Installation Instructions and Operation Manual for the specific model.
TABLE OF CONTENTS
INTRODUCTION
1
SPECIFICATIONS
381 502944 Service Manual for NFPA Hood

FEATURES & OPERATING CONTROLS
2
Note: Items beginning with “a. ...” are part of the Ansul® fire suppression system
Items beginning “f. ...” are part of the FRYER
Items beginning “v. ...” are part of the VENTILATOR
f.1 POWER SWITCH FRYER position turns ON the VENTILATOR POWER LIGHT and
(FRYER - OFF - FILTER) BLOWER. If, within 10 seconds, there is sufficient AIR FLOW for
proper operation, the POWER LIGHT will remain ON and the fryer will
operate.
If, after 10 seconds, there is not sufficient AIR FLOW for proper
operation, the BLOWER and VENTILATOR POWER LIGHT will turn
OFF and the SERVICE REQUIRED LIGHT will turn ON.
Note:ThePOWERSWITCHmustbeturnedOFF to reset the system
before the fryer can be operated.
v.2 VENTILATOR POWER Glows when the FRYER POWER SWITCH is ON.
LIGHT (green)
v.3 CHECK FILTERS Glows when GREASE BAFFLE and/or HEPA AIR FILTER are not
LIGHT (amber) properly installed. When ON, the fryer heating elements are de-activated.
Make sure both the HEPA FILTER and the GREASE BAFFLE fully
depresses their respective filter sensor tang (f.25, lower left corner of the
filter rail), which proves the filters are in the proper position. When the filters
are in the proper position, the CHECK FILTER light will not be lit.
BACK VIEW SIDE VIEW FRONT VIEW
FRYER
WVAE-30,
WVAE-55 or
WVPE-30
VENTILATOR WARNINGLIGHT PANEL
v.2 v.3 v.4 v.5
f.1
a.15 a.15
f.16
f.17 a.18 a.19 f.20
f.21
f.22
f.23
f.24
f.26
v.6
v.7
v.8
v.9
a.10
a.11
v.12
a.13
a.14
v.25
381 502944 Service Manual for NFPA Hood

FEATURES & OPERATING CONTROLS (continued)
3
v.4 REPLACE FILTERS Will turn ON if either or both the HEPA AIR FILTER and/or CHARCOAL
LIGHT (amber) FILTER are due for replacement. The fryer will continue to operate, but
the air filter(s) must be changed in a timely manner or it (they) will clog,
the SERVICE REQUIRED LIGHT will turn ON and the fryer will shutdown
until the filter(s) have been replaced.
v.5 SERVICE REQUIRED Will turn ON and the fryer will shut down whenever dirty filters cause
LIGHT (red) insufficient ventilator AIR FLOW for proper operation. Replace both the
HEPA FILTER and the CHARCOAL FILTER to resume operation.
v.6 EXHAUST COLLAR Contains fire damper with pre-installed 285ºF (141ºC) fusible link.
v.7 VENTILATION BLOWER Provides airflow.
v.8 UPPER REAR Provides access to BLOWER and PRESSURE SWITCHES.
REMOVABLE PANEL
v.9 PRESSURE SWITCHES Detect blower operation and filter status.
a.10 ANSUL® ACTUATOR Controls the release of the fire suppression media
a.11 ANSUL® SYSTEM Provides pressurization of the fire suppression system
PRESSURE CARTRIDGE
v.12 LOWER REAR Provides access to fire suppression system components.
REMOVABLE PANEL
a.13 FIRE SUPPRESSION 1.5 gal. container of Ansulex® R-102 liquid fire suppression media.
MEDIA TANK
a.14 FRYPOT FUSIBLE LINK 450ºF link protects against run-away heater.
a.15 MANUAL PULL STATION Provides for manual activation of the fire suppression system
f. 16 REAR LEGS REPLACE CASTERS WHEN A REMOTE MANUAL PULL STATION IS
INSTALLED.
v.17 VACUUM TAP Senses low-pressure side of BLOWER.
a.18 FILTER CHAMBER 280ºF fusible link provides protection against fire in the upper portion of
FUSIBLE LINK the hood.
a.19 DISCHARGE NOZZLES Control dispersal of the fire suppression media.
v.20 TOP REMOVABLE PANEL Provides access to warning light panel wiring.
v.21 CHARCOAL FILTER Provides for some odor control. Replace this filter each time the HEPA
FILTER is replaced.
v.22 HEPA FILTER Traps most grease and other cooking vapor particles. Replace the HEPA
FILTER and the CHARCOAL FILTER at the same time.
v.23 GREASE BAFFLE Separates grease and other liquids from the air stream.
v.24 GREASE CUP Catches liquids trapped by the GREASE BAFFLE.
f.25 FILTER SENSORS Detect GREASE BAFFLE and HEPA FILTER.
f.26 GREASE TRAY Collects liquids that drain from the top of the fryer.
381 502944 Service Manual for NFPA Hood

OPERATION
4
VENTILATOR
POWER ON CHECK
FILTERS REPLACE
FILTERS SERVICE
REQUIRED
NOTE: Never press the POWER SWITCH to FRYER unless the HEATING ELEMENTS are
covered with either shortening (or, in the case of cleaning, water - NEVER MIX OIL AND WATER ).
Check the COLD OIL LINE for the proper shortening level.
NOTE: This fryer is designed to be used with LIQUID SHORTENING ONLY, unless it is
equipped with the solid shortening option (available only on model WVAE-55FS).
Lard and solid shortening will solidify in the filter pump, causing pump failure.
1. Verify that the CHARCOAL FILTER (if used), HEPA FILTER and GREASE BAFFLE are properly
installed in their respective locations. The HEPA FILTER and GREASE BAFFLE activate
MECHANICAL INTERLOCK SWITCHES when they are in their proper position. Activating both
mechanical interlock switches energizes the heating element.
The CHARCOAL FILTER does not activate a position sensor, thus the ventilator may be operated
without this optional filter.
A pressure tap on the blower housing and a vacuum tap downstream of the filters (but before the
blower) feed pneumatic signals to the AIRFLOW VACUUM SWITCH and to the SERVICE FILTER
VACUUM SWITCH.
2. Press the POWER SWITCH to the FRYER position:
a. The BLOWER will start and the VENTILATOR POWER ON (green light) will light.
b. The TEN SECOND DELAY RELAY will be energized, bypassing the AIRFLOW VACUUM
SWITCH during the ten-second countdown.
3. If, after the ten second delay, sufficient air flow is sensed by the AIRFLOW VACUUM SWITCH , the
BLOWER will continue to run and the fryer will be energized.
4. If, after the ten second delay, sufficient air flow has not been sensed by the AIR FLOW VACUUM
SWITCH, the BLOWER will shut down and the SERVICE REQUIRED (red light) will be lit.
5. If either the HEPA FILTER or GREASE BAFFLE should be removed or become dislodged, the
respective MECHANICAL INTERLOCK SWITCH will open, the fryer will be de-energized and the
CHECK FILTERS (amber light) will light.
6. If either the HEPA FILTER or the CHARCOAL FILTER, or in combination, become partially clogged,
the SERVICE FILTER VACUUM SWITCH will close and the REPLACE FILTERS (amber light) will
light. The fryer will continue to operate. This is a WARNING that the filters are approaching the end
of their service life. The filter(s) must be replaced before they become so clogged that the fryer/
blower is shut down by the AIR FLOW VACUUM SWITCH.
381 502944 Service Manual for NFPA Hood

5
IMPORTANT: When the REPLACE FILTERS (amber light) comes on, the fryer will soon shut
down. The actual time between the light coming on and the fryer shutting down depends upon the
type and quantity of product being cooked. The operator must prepare to change the filter(s) by
making sure that fresh replacement filters are on hand at the fryer location.
7. If either the HEPA FILTER or the CHARCOAL FILTER, or in combination, become clogged to the
point that sufficient airflow is not sensed by the AIRFLOW VACUUM SWITCH, the switch will open.
The BLOWER will shut down, the fryer will be de-energized and the SERVICE REQUIRED (red
light) will light.
The manufacturer recommends replacing both the HEPA FILTER and the CHARCOAL FILTER at
the same time. Verify that the air flow arrows point toward the fan.
After the filter(s) are replaced, the POWER SWITCH must be pressed to OFF, then back to FRYER
to reset.
8. Any loss of electrical power will disable the fryer. After power is restored, the POWER SWITCH
must be pressed to OFF, then back to FRYER to reset.
9. The fryer is de-energized anytime the Ansul® fire suppression system has discharged, or is
otherwise is not CHARGED and COCKED. The BLOWER will continue to run.
10. Both the fryer and the BLOWER are de-energized when the POWER SWITCH is in the FILTER
position.
11. Control power is routed through a jumper at the REMOTE INTERLOCK TERMINAL BLOCK.
For installations where remote shut-down is required, the jumper is removed and power is routed
through the remote interlock circuit.
Both the fryer and the BLOWER are de-energized when the remote interlock circuit is open.
12. Some jurisdictions require that an alarm signal be generated should the fire suppression system be
activated. A set of dry contacts are provided at the BUILDING ALARM RELAY for this purpose.
IMPORTANT: DO NOT connect power to the building alarm relay.
OPERATION (continued)
381 502944 Service Manual for NFPA Hood

TROUBLESHOOTING SUGGESTIONS
6
SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY
BLOWER/FRYER NOT OPERATING
VENTILATOR POWER (green light) not lit
POWER SWITCH not in FRYER Press POWER SWITCH to FRYER position
Fryer POWER SWITCH defective Replace power switch
10-20 -second timer defective Replace timer
Remote interlock circuit open Locate and rectify open circuit condition
BLOWER/FRYER NOT OPERATING
VENTILATOR POWER (green light) lit
Blower wiring defective Repair wiring
Blower fan jammed Clean blower fan
Blower motor defective Repair/replace motor
BLOWER/FRYER NOT OPERATING
SERVICE REQUIRED (red light) lit
HEPA FILTER and/or CHARCOAL filters plugged Replace both HEPA and CHARCOAL FILTER
AIRFLOW VACUUM switch not made Locate and rectify reason SWITCH not
Vacuum tap on blower fan housing plugged Clean vacuum tap
For continuing problems with plugged tap,
upgrade to new-style fan housing.
AIRFLOW vacuum switch defective Replace vacuum switch
REPLACE FILTERS (amber light) lit
Blower/Fryer operating normally
HEPA FILTER and/or CHARCOAL filters
becoming plugged Replace both HEPA and CHARCOAL FILTER
Vacuum tap on blower fan housing restricted Clean vacuum tap
For continuing problems with plugged tap,
upgrade to new-style fan housing.
SERVICE FILTERS vacuum switch defective Replace vacuum switch
CHECK FILTERS (amber light) lit
Blower operating normally
Fryer not operating
GREASE BAFFLE and/or HEPA FILTER out of
place Install BAFFLE / HEPA FILTER properly.
Filter sensing switch defective or out of Adjust or replace switch
FRYER NOT OPERATING
Blower operating normally
Check Filters (amber light) not lit
Defective CONTROLLER or TEMP CONTROL
‘STAT Repair or replace
HI-LIMIT ‘STAT tripped Clean frypot & reset ’stat
HI-LIMIT ‘STAT defective Replace hi-limit thermostat
Defective relay Replace relay
Fryer with Solid State Controller - Programmed
temp too low Program proper temperature
Fryer with Solid State Controller - STANDBY or
CLEANING mode selected Select a menu key
VENTILATOR POWER (green light) not lit
All other operations normal Indicator light defective Repair/replace light
381 502944 Service Manual for NFPA Hood

SERVICING INSTRUCTIONS
7
FIRE DAMPER COMPONENTS
ITEM DESCRIPTION SERVICE PART
5 DAMPER SUPPORT
9 FIRE DAMPER ASSEMBLY,
(fusible link rated at 285ºF/141ºC) 501187
FIRE DAMPER ASSEMBLY INSTRUCTIONS
1. The FIRE DAMPER is accessible by removing the UPPER REAR
cover. The FIRE DAMPER sets in the DAMPER SUPPORT and
may be removed by lifting straight out.
2. The FIRE DAMPER normally needs no maintenance. If it becomes
heavily covered in grease and/or dust it must be replaced.
3. If the FIRE DAMPER malfunctions or if the fusible link releases,
the manufacturer recommends that the entire FIRE DAMPER
ASSEMBLY be replaced.
4. Reinstall the FIRE DAMPER with the “THIS SIDE UP FOR
HORIZONTAL MOUNTING” arrow pointing away from the
BLOWER, and the shutter assembly on the wide side of the
DAMPER SUPPORT (i.e. on the left as seen from the rear of the
hood).
381 502944 Service Manual for NFPA Hood

SERVICING INSTRUCTIONS (continued)
8
FILTER INTERLOCK COMPONENTS
ITEM DESCRIPTION SERVICE PART NO.
13 MAGNET ARM
15 INTERLOCK BLOCK
24 SHORT LINK
25 COVER, INTERLOCK ASSEMBLY
34 LONG LINK
37 PROXIMITY SWITCH 501409
41 BUSHING 501448
43 PAWL
48 MAGNET 63948
AA “E” CLIP, .122ID SS 50136
BB NUT 8-32 (pk100) 50153
CC SET SCREW 8-32 x 3/4 ALLEN SOCKET
DD SCREW 8-32 x FLAT HEAD (pk 50) 65193
EE SCREW 8-32 x 5/16 7506-39
FF SCREW 4-40 x 3/8 68748
GG WASHER #4
HH LOCK WASHER #4
JJ NUT 4-40 8543-74
381 502944 Service Manual for NFPA Hood