HEAVY DUTY ELECTRIC AND GAS OVENS IN TWO AIR FLOW PATTERNS
For paint baking, drying, preheating, annealing or any other heat processing of large or numerous parts at temperatures to 750°F. Oven size conveniently accommodates materials handling equipment. Choice of either combination or full horizontal air flow in either rear or top mounted heat chamber configurations. Designed and constructed for long, hard, continuous use.
Standard Walk-In Ovens from Grieve meet the requirements of National
Fire Protection Association Standard 86, Industrial Risk Insurers, Factory
Mutual and OSHA standards. For some applications, such as those involving
flammable solvents or hazardous locations, the above organizations
require additional safety devices.
Controls
—Digital, microprocessor based, thermocouple actuated, indicating temperature
controller
—Modulating burner on gas ovens
—Motor control push buttons and on-off heat switch
—Easy-to-see pilot lights
Safety Equipment — Electric Oven
—Adjustable, thermocouple actuated, manual reset excess temperature controller
—Separate heating element control contactors
—Recirculating blower air flow safety switch
Safety Equipment — Gas Oven
—Adjustable, thermocouple actuated, manual reset excess temperature controller
—Electronic flame safeguard protection
—Powered forced exhauster for combustion venting
—Exhauster air flow safety switch
—Recirculating blower air flow safety switch
—Two pilot safety shutoff valves with leak test stations
—Two main safety shutoff valves with leak test stations (Industrial Risks Insurers vent valve only provided on specific request)
—Valve position indicator on main safety shutoff valves
—Over 400,000 BTU/HR safety shutoff valve interlocked with purge timer
—Purge timer
—High gas pressure switch
—Low gas pressure switch
Construction
—Choice of air flow patterns
—Adjustable patented opposed louvers on full coverage supply and return
duct work
—Choice of rear or top heat chamber
—Available with doors at each end
—Choice of floor configurations, flat plate, insulated floor, truck wheel
guide tracks
—Exceptionally heavy duty doors
—Aluminized steel interior
—Aluminized steel exterior with enamel finish
—High temperature door gasket with stainless steel spring insert
—6 lbs/cf density industrial rockwool insulation
—Brushed stainless steel control panel face
—1 year limited warranty
Every oven fully assembled and individually factory tested
ALL MODELS
— 208 volts, 3-phase, 60 Hz
— 230 volts, 3-phase, 60 Hz
— 460 volts, 3-phase, 60 Hz
— Other electrical characteristics available
Aluminized steel interior. Carbon steel structural members and steel plate painted
with high temperature aluminum paint. Trilite Green enamel painted aluminized
steel exterior.
Two Air Flow Patterns Available
Combination air flow for random shapes and sizes or for large bulky objects where
heated air can move upward, around and through the load. Horizontal air flow for
applications where heated air must move sideways to pass through a load such as
trays or flat sheets. See circulation diagrams below.
Two Oven Configurations Available
Rear heat chamber for easy handling, low profile equipment. Top mounted heat chamber
to minimize factory floor space occupied or to allow installation of doors at
each end. Doors on front and rear allow for pass through operation or for loading
from both ends.
To facilitate shipping
and handling, top mounted heat chamber ovens are available with removable heat
chambers. These ovens are fully assembled and tested. They are then sectioned
and match-marked for easy reassembly at destination by customer.
Ovens come standard with
steel plate floor and doorsill which oven doors seal against. If specified,
doorsill can be eliminated and doors provided with drag seals. Up to 6' wide
work space, plate floor is 1/8" thick. Wider ovens have 1/4" plate floor. Provisions
for customer installed insulated floor are included. Optional factory installed
insulated floor is available. See Bulletin WI-513.
Optional truck wheel guide
tracks for loading equipment are available. Guide tracks can be installed on
steel plate floor, recessed into insulated floor, or installed on top of insulated
floor. See Bulletin WI-513.
Optional loading trucks
specifically designed for use in each oven are available. Loading trucks come
in shelf loading models with removable shelves or as heavy duty flat bed models
with grating surface. See Bulletin WI-513.
Electric Models
Each features completely wired, side access UL
listed control panel enclosing terminals for incoming power, temperature controllers,
push buttons and pilot lights. Motor starter and heating element contactors
electrically interlocked to shut off heaters if power to blower is interrupted
and to permit operation of blower without heat for cooling. Incoloy sheathed
tubular heating elements.
Gas Models
— 1,000 BTU natural gas at 6" water column pressure: 1" NPT inlet to 350,000
BTU/HR; 1-1/4" NPT to 1,200,000 BTU/HR
— Other gas characteristics available
Control panel as detailed above and safety devices as listed on the front of
this bulletin. A 325 CFM powered forced exhauster is included up to 800,000
BTU/HR; at 1,200,000 BTU/HR a 650 CFM exhauster is included. Both exhausters
have 6" outlets. Automatic pre-ignition purge period and push button electric
ignition contributes to ease of operation. Modulating gas burner is protected
with electronic flame safety relay.
Circulation Diagrams
(Front View)
Combination
Air Flow
Horizontal
Air Flow
Heated air is provided from full coverage
supply duct work at each side of the work space and sweeps upward through
the load to a return duct at the top of the work space. Used in most shelf
truck loading applications where sufficient shelf area is left open to
allow vertical air movement upward through the loaded truck. Ideal for
large parts placed directly on oven floor or loaded on a flat bed truck.
See Bulletin WI-511
Heated air is blown horizontally
across the work space between full coverage duct work. For shelf truck
loading applications with densely loaded shelves, solid bottom trays,
or flat sheets where heated air can only pass sideways above and below
each level. Also used on oven floor or loaded on a flat bed track. See
Bulletin WI-512
See Walk-In Oven Additional Equipment
Bulletin WI-513 for
Loading Trucks and Shelves, Insulated Floor and Truck Tracks,
Optional Temperature Controllers and Timers.
UL LISTED CONTROL
PANEL
