Circul-Air C612 User manual

INSTALL & USE GUIDE 2023
CIRCUL-AIR CABINET DRYERS
208 & 240 V DRYERS, 1PH & 3PH North America
120 V DRYERS, 1PH North America
For models:
C612, C613, C633, C634
E612, E613, E633, E634
D612, D613, D633, D634
V511
REV 1, 2023
Email: [e-mail]
Web: www.circul-air-corp.com
1-800-795-1150

SAFETY
WARNING
DISCONNECT POWER TO DRYING CABINET BEFORE SERVICING TO
PREVENT ELECTRICAL SHOCK OR BODILY INJURY
1. THIS MACHINE MUST HAVE A PROPER DUCT COVER OR VENTING IN PLACE BEFORE OPERATION.
FAILURE TO DO SO CAN RESULT IN INJURY OR PROPERTY DAMAGE.
2. THIS MACHINE MUST BE PROPERLY WIRED TO LOCAL, STATE / PROVINCE OR FEDERAL CODE BY A
COMPETENT ELECTRICIAN. A LOCAL, INDEPENDANT DISCONNECT PROPERLY SIZED FOR THE
EQUIPMENT IS RECOMMENDED FOR SAFE OPERATION. FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY RESULT IN INJURY OR PROPERTY DAMAGE.
3. NEVER DRY EQUIPMENT WHICH HAS FLAMMABLE MATERIALS (OILS, FUEL ETC) IN THIS CABINET.
4. DO NOT OPERATE THE EQUIPMENT FOR PROLONGED PERIODS OF TIME WITH THE DOORS OPEN.
THIS WILL STALL THE AIRFLOW AND MAY RESULT IN DAMAGE OF THE HEATING ELEMENTS,
PERSONAL INJURY DUE TO BURNS OR PROPERTY DAMAGE.

MACHINE SPECIFICATIONS:
Model
PPE-2
PPE-4
PPE-6
PPE-6XL
Shipping Dimensions:
(Width x Depth x Height)
46” x 40” x 90”
46” x 56” x 90”
46” x 60” x 90”
60” x 64” x 90”
Shipping Weight:
615 lb
775 lb
875 lb
1175 lb
Cabinet Dimensions Closed: (Width x
Depth x Height) *
32.5” x 37” x 84”
47” x 33.9” x 81”
55” x 37.25” x 83”
48.5” x 55” x 81”
Door Depth @ 90: (Depth)
67”
60”
63”
80”
Width Clearance @ 120: (Width) **
39”
62”
73”
78”
Min Oset from rear wall
5
10
10
10
Min Oset from side wall
5
6
6
6
PERFORMANCE
Airow, Negave Pressure Axial:
600 CFM
900 CFM
900 CFM
900 CFM
Heang @ 240V, 1PH:
1500W
6000W
6000W
6000W
ELECTRICAL OPTIONS ***
240/1/60
NA
C612
E612
D612
208/1/60
NA
C613
E613
D613
240/3/60
NA
C633
E633
D633
208/3/60
NA
C634
E634
D634
120/1/60
V511
NA
NA
NA
CONSTRUCTION AND ACCESSORIES
Standard Finish:
Powder coat CAC
Grey, Galvanized
Powder coat CAC
RED, Galvanized
Powder coat CAC
Grey, Galvanized
Powder coat CAC
Grey, Galvanized
Grid Posions:
4
4
4
15
Standard Hose / Gear Grid:
3
2
3
10
Standard Boot / Gear Grid
1
2
1
0
Boot / Glove Hangers (CAC-BGH):
2
6
6
6
Gear Hangers (CAC-GH):
2
6
6
6
105F Max Temperature Control:
YES
YES
YES
YES
* This includes the door handle clearance
** This is the minimum opening required to remove the shelves from the unit.
*** Refer to electrical installaon for minimum amp service and wire requirements

ELECTRICAL CONNECTIONS:
Circul-Air cabinets are designed for simple electrical installaon. Follow this secon for preparing for and
connecng your cabinet to the building service.
PPE-2 Cabinet:
This cabinet comes equipped with an 8’ grounded power cord,
connected with a stain relief at the back of the cabinet. A 20A
standard recepcle is recommended for use, however a 15A outlet
will be sucient in most applicaons.
Ensure the strain relief is secure and that the cable is not under
tension when in use.
CAUTION
The prolonged use of an extension cord is not recommended.
PPE-4, PPE-6 and PPE-6XL Cabinets:
These larger cabinets come equipped with an electrical
connecon box at the top, rear le of the machine when
viewed from the rear of the equipment. A standard 1-
1/8” port suitable for a ¾” exible conduit ng is
provided to connect the equipment to the wall disconnect
(by customer).
Depending on the electrical conguraon chosen, the
customer will need to pull a sucient quanty and size of
wire to the equipment.
Connecon is at a marked locaon (L1/L2/L3/N/GND) and
is determined by the model chosen.
240 TYPICAL
208 TYPICAL

Machine Placard:
Each dryer has a placard inside the door which provides informaon on the machine
construcon as well as basic use. Key pieces of informaon to know are the model, serial # and
electrical conguraon. The fuse size noted is the wall disconnect sizing. Local electrical codes
take priority in sizing the disconnect.
ONLY CONNECT SUPPLY TO L1, L2, L3, N AND GND.
NEVER CONNECT TO THE INTERNAL TRANSFORMERS.

DUCTING & VENTILATION:
Circul-Air cabinets are negavely pressured, axial ow cabinets which means that the fan is connuously
evacuang high volumes of internal air from the cabinet. These cabinets require some backpressure to
work most eecvely, and for best drying the damp air should be removed from the area of the cabinet.
Recommended:
It is recommended that all cabinets are
ducted with a 10” or 12” diameter
duct, completely out of the room
where the unit is located to ensure
that the unit is not recycling the humid
air being removed form the cabinet.
Duct sizes smaller than 8” in diameter
are not recommended.
Oponal:
PPE-2 cabinets ship from the factory with a sloed guard which protects the operator and
establishes backpressure. It can be operated with this guard.
EVI-4, PPE-6 and PPE-6XL cabinets can be equipped with a deecon duct which steers the damp
air away from the cabinet. This soluon is best used in large spaces such as apparatus bays or
well-venlated rooms. These 10” or 12” ducts include a reducing collar, a short vercal duct, an
adjustable angle and a second straight secon. Fastened to the roof of the equipment this
establishes the necessary backpressure as well as protects the operator.
Some applicaons may also benet from an inline manual damper
which can be used to trim (or increase the backpressure) to account
for local condions such as proximity to sea level or cold humid
condions.
Complex installaons such as in high use hose drying may incorporate
2 or more cabinets and may incorporate building HVAC return ducts. In
this case interlocked dampers may be used to prevent backow of air
into cabinets not in use. A remote contactor is recommended and may
be ed to terminal “6” in the cabinet, 120V signal to me to the
operaon of the cabinet fan motor.
Other recommendaons:
•When passing through cold spaces the ducng must be insulated to prevent
condensaon.
•Use the maximum duct size available and reduce turns or angles when possible.

•Ensure external penetraons have a pest guard or rain hat to prevent ingress of pests,
water or debris.
•Limit duct runs to 15’-20’ or less. If duct runs need to exceed 15’-20’ an inline booster
may be required (by customer). These need to be at least 10” in diameter and supply at
least 700 cfm of airow. A remote contactor is recommended and may be ed to
terminal “6” in the cabinet, 120V signal to me to the operaon of the cabinet fan
motor.
Adjusng Back Pressure for Temperatures in Wet Climates
In some damp sea level condions, the cabinet may require addional backpressure to ‘trim’ the
performance of the heang system. The following process may be ulized.
1. Set adjustable damper or louver spring to open or no restricon.
2. Record ambient temperature on machine in fan only mode.
3. Turn on dryer and run for 15 minutes. Record temperature achieved empty. It should be
15 to 20 F over ambient.
4. Cool machine in fan mode 5-10 mins.
5. Adjust damper to 75% open.
6. Repeat test.
7. Adjust unl result is 15-20 F from ambient.
If more than 50% reducon is required, contact your Circul-Air Corp service department for
assistance.
LEVELING THE CABINET
Each drying cabinet has (4) leveling feet which can be accessed from inside the cabinet or from
underneath. Inside adjustment requires a large, sloed screwdriver, while adjustment from beneath may
require a larger adjustable wrench. Typically, these can be adjusted by hand.
Equipment is shipped with the feet fully retracted. If a foot pad is not touching, turn down unl just in
contact with the oor.
Adjusng Door Squareness for Single or Two Door Cabinets
1. Ensure the cabinet is level with the feet as retracted as possible.
2. Observe the alignment; if the le door is low, adjust the right foot and vice versa.
3. Open the doors rst.
4. While an assistant pushes up on the center of the door, adjust the appropriate front le
or front right foot. Have the assistant let the cabinet sele down, carefully close the
doors and check alignment.
Note: Use minimal adjustments to correct the leveling. 2-3 turns are more than sucient to adjust the
door squareness.

CABINET OPERATION
Each cabinet comes with a simple to operate NFPA 1851 compliant mer panel. The operator can select
the duraon of the drying desired and whether to opt for heated or ambient air to dry the equipment.
The mer displays the remaining drying me and the current temperature inside the cabinet.
The operator cannot increase the maximum temperature. Circul-Air cabinets are designed to heat the
incoming air above ambient to promote the release of water from the equipment (PPE & Hose). For PPE-
2 cabinets this is 10-15F and for the larger cabinets this is 15-25F depending on the local condions.
The cabinet will ensure that the heat is disabled once the airow reaches 105F to remain compliant.
Standard Circul-Air Cabinet Timer
Control Panel Buon
Acon
Result
HOLD 3-5s to turn on controls
Press 1x for FAN
Press 2x for FAN & HEATER
On Enable Green LED
Fan On Yellow LED
Fan & Heater Red LED
Press GEAR for 3:00 preset
Press HOSE for 10:00 preset
Sets Time to 3:00
Sets Time to 10:00
Press 1x to start cycle
Press 1x to stop cycle
Starts drying cycle
Stops drying cycle, sets me to 0:00
Hold to set custom me.
Press to switch between hr /
min
Tim e Blinks 0:__ or __:00
Press to increase or decrease
me
UP Arrow, increase value +1
Down Arrow, decrease value - 1

PREPARING EQUIPMENT (PPE, HOSE AND OTHER GEAR)
The proper decontaminaon of PPE equipment (aka bunker gear, turnout gear, re protecon gear)
requires the use of an NFPA 1851 compliant extractor which has been properly congured. This includes
disassembly of the gear, pre-treatment if required and a cleaning cycle with a spin speed of less than
100g, maximum 105F water and NPFA compliant cleaning chemicals.
Informaon on Circul-Air Corp’s complete line of Express and Heavy Duty extractors, recommended
Citro-Squeeze and SC-14 cleaning chemicals can be obtained at www.circul-air-corp.com, sales@circul-
air-corp.com or by contacng your local distributor of Circul-Air products.
Equipment that has been processed correctly should be disassembled into its base components, liners
and shells. Typical drying mes of shells components will be 1.25 – 2 hrs. Drying mes of lines can vary
between manufacturers, however this should take between 3-3.5 hrs for standard products and 3.5 – 4.5
hrs for heavier fabrics and quilng.
Each cabinet has a rigid aluminum bar to support the gear, ensuring
that the gear can be evenly distributed in the cabinet. Excessively
loading the cabinet will increase dry me.
Boots can also be dried in the small cabinets by inserng them tops
down in the supplied wire shelves. (Not applicable for 6XL cabinet).
Helmet holders are available for placing helmets on the grid.
Hoods, gloves and other loose equipment can also be spread on
the grids to aid in drying when the hangers are not appropriate.
Hose with diameters up to 5” can be dried in the cabinet. Ensure that the
water inside has been drained and then loosely spool the hose on the
provided shelves, allowing room for air to pass through the coils. Hose
will typically take between 10-12 hrs to dry in normal operang
condions. Informaon on Circul-Air Corp’s Roto-Jet hose washers is
available to aid in pre-cleaning hoses from 1-3/4 – 5” diameter can be
obtained at www.circul-air-corp.com, [e-mail] or by
contacng your local distributor of Circul-Air products.

PPE-2 Troubleshoong
No Heat / Low Heat
Does the temperature rise in 5-10
min when in heat mode, empty.
No rise - verify contactor is pulling
in, check the snap disc connuity.
Some rise - one or more element
may have failed. Compare ohm
reading with value on element.
No Control Panel Display
Will the panel come on with mode
buon held for 3-5 seconds?
No - remove front mer and check
le breaker for amperage trip.
Yes, but promptly turns o when
cycle started
Short in onboard component - call
service
No Fan
Does unit start and then stop?
Check for obstrucon in fan blades
Does the unit fail to start?
Remove front mer and check right
breaker for amperage trip.
Is the panel damaged or worn
Inspect for buon resistance, call
service
Long Dry Time
Conrm the clothing is properly
separated and extractor is
funconing correctly.
Ensure gear is separated, not
excessively loaded and hung
properly.
Is the operang condion close to
sea level or high humidity, low
temp?
Trim the outlet cover by restricng
25% of outlet and retesng.
Is the plenum (oor plate) installed
and unobstructed?
Verify to ensure proper airow
through boom of cabinet.
Is the outlet ducted or have a safety
cover?
Lack of back pressure can increase
dry me.
PPE-4, PPE-6, PPE-6XL
240V – Breaker 1 or 2 tripped
Is the trip instantaneous or
intermient?
Intermient - shared circuit drawing
down voltage, tripping amperage
on 240/120 transformer.
Instantaneous – 240 Leg to staon
dropped or failing.
Instantaneous – 208 supply to 240
panel. Check if leg 1 = 120V or
240V. Should be 240.
240V or 208V breaker 3 tripped
Is the breaker next to Terminal 6
tripped? No power to control panel.
Incorrect # of wires for 208 system
– call service for opons.
Intermient Overload – check for
other equipment on dedicated
circuit.
Shortage – check for loose wires in
panel.
Electrical surge - lightning strikes,
grid surges or drops can cause this
breaker to protect equipment.
Reset.

240V or 208 breaker 4 tripped
Is the breaker on the end of the rail
tripped?
Motor over amperage - check for
obstrucon.
Motor wire issue – check for loose
wire.
Failed motor – call service.
Secondary draw on terminal 6.
Check connected blowers or
dampers for short.
No Heat / Low Heat
Does the temperature rise in 15-25
min when in heat mode, empty.
No rise - verify contactor is pulling
in, check the snap disc connuity.
Some rise - one or more element
may have failed. Compare ohm
reading with value on element.
No Control Panel Display
Will the panel come on with mode
buon held for 3-5 seconds?
No - open top of control panel and
check breaker beside terminal 6
breaker for amperage trip.
Check breaker 1 and 2 beside
terminal 1 for amperage trip.
Yes, but promptly turns o when
cycle started
Short in onboard component - call
service
No Fan
Does unit start and then stop?
Check for obstrucon in fan blades
Does the unit fail to start?
Remove top of control panel and
check right breaker for amperage
trip.
Is the panel damaged or worn
Inspect for buon resistance, call
service
Long Dry Time
Conrm the clothing is properly
separated and extractor is
funconing correctly.
Ensure gear is separated, not
excessively loaded and hung
properly.
Is the operang condion close to
sea level or high humidity, low
temp?
Trim the outlet cover by restricng
25% of outlet and retesng.
Is the plenum (oor plate) installed
and unobstructed?
Verify to ensure proper airow
through boom of cabinet.
Is the outlet ducted or have a safety
cover?
Lack of back pressure can increase
dry me.

CIRCUL-AIR CORP. WARRANTY CLAIMS
The Circul-Air Corporaon (hereaer referred to
as CAC) warrants THIS product to be free of
defects in material and workmanship for Ten
(10) years from the date of shipment from the
factory. CAC shall only be liable under this
warranty if the product is installed properly and
used according to the direcons furnished by the
CAC.
The Basic Product Warranty is a “PARTS ONLY”
warranty and CAC’s obligaon shall be limited
to the replacement of new parts of the products
for those returned to CAC undamaged at the
purchaser’s expense and found to be defecve
by CAC. CAC will then repair or replace, at its
opon any such part determined to be defecve
during this warranty period. Replacement parts
will be shipped F.O.B. CAC’s facility. CAC is not
responsible for damages during transport of any
product to or from CAC. Replacement of parts
shall not extend the original warranty period of
the original total product, including any
replacement parts supplied.
This Standard warranty does not cover
corrosion; normal deterioraon; misapplicaon;
improper installaon; labor charges paid for
parts replacement, adjustments, repairs or other
work supplied by others; defects in parts
resulng from neglect, negligence, accident,
re, explosion, high or low voltage, jumpering or
jamming controls, shorng out of components;
improper voltage; or any acts of nature.
This warranty does not cover failure of the
purchaser to provide normal recommended
maintenance, adjustments, cleaning or service
on the CAC equipment; improper repairs or
alteraons; or misapplicaon of the equipment.
It is expressly understood that this warranty is
made IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, WHETHER ARISING
FROM STATUTE, COMMON LAW, CUSTOM, OR
OTHERWISE, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR ANY
PARTICULAR PURPOSE, QUALITY, DESIGN,
CONDITION, DURABILITY OR SUITABILITY, and in
consideraon of the express warranty herein
contained, BUYER EXPRESSLY WAIVES ANY
RIGHT TO CLAIM OTHER WARRANTIES,
EXPRESSED OR IMPLIED.
It is further understood that CAC’s liability for
breach of warranty shall be limited to terms of
this warranty and buyer agrees that CAC SHALL
NOT, IN ANY EVENT, BE LIABLE FOR SPECIAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES, OR
DELAY. The buyer’s remedies are exclusive, and
shall be limited to those provided herein.
CAC neither assumes and does not authorize any
person to assume any obligaon or warranty
other than those stated herein.
Any suggeson to the contrary notwithstanding,
CAC shall not, in any event, have any liability
under this warranty unless and unl it has been
paid in full for the products. The warranty
period shall begin as described above, whether
or not payment has been made.
Defecve material may be repaired or replaced
at our opon. If replaced, full credit will be
issued in the amount of the original purchase
price if returned undamaged within 30 Days of
shipment, for the returned material; in the
event the material is found to be not defecve,
or to be damaged or abused, we reserve the
right to return the material “as is” to the sender
and at his freight cost. If CAC agrees to keep
such material, credit will be issued minus the

cost of repair and recondioning, the return and
less restocking charges.
Otherwise only cost of the part will be covered
by our warranty. But if the part(s) CAC has sent
are not the problem please reinstall the old part
and return within 30 Days of shipment the new
unused part back to CAC, we will then aer
inspecng the part to insure it is sll in good
working order will return the new unused
part(s) to inventory and issue credit. Old parts
returned to us that are in good working
condion or aer the 30 Day period will be
charged to you and not covered by warranty. It
is important to remember that in order for our
warranty to cover the cost of the new part you
must return the faulty part to us within 30 days
to receive credit. Then aer CAC receives the
part we must conrm that the returned part is
actually faulty before issuing credit. When
returning the faulty part, please reference the
Return Merchandise Authorizaon number
(Known as the RMA number). Be sure to
adequately package the part to be shipped back
to CAC to prevent it from being damaged during
shipment. You will not receive credit for parts
received at CAC that are damaged and cannot
be returned to the part manufacturer for credit.
Also please provide a small descripon as to
what is wrong with the part that is being
returned under warranty:
Reminder: Our warranty only covers the cost of
the faulty part and MUST be returned within 30
days from the me of shipment from the factory
to receive credit. You are responsible for any
other expenses you incur, including freight
charges, miscellaneous parts and the labor to
install the part(s).
Warranty DOES NOT cover the following Items:
1. A maintenance items. 2. Normal wear,
adjustments, and periodic service. 3. Damage
caused by accidents, improper installaon or
handling, or faulty repairs. 4. Damage caused by
operaon of the unit at improper voltage loads,
condions, modicaons, or installaon
contrary to published specicaons or
recommendaons. 5. Damage caused by
negligent maintenance such as: a. Breakage due
to mishandling or misuse of the product or part.
b. Failure to follow and perform scheduled
maintenance as prescribed in supplied manuals.
6. Parts purchased from sources other than CAC,
Replacement of a failed CAC part with a non-
CAC part voids warranty on that part. (Unless
prior wrien authorizaon has been given by
CAC for you to do so.) 7. Warranty Labor.
REPLACEMENT PARTS
When wring or calling to Circul-Air Corporaon
for service parts, provide the model number
and serial number of the unit as stamped on the
unit plate aached to the unit. If replacement
parts are required, include the date of
installaon, the date of failure, an explanaon
of the malfuncon, and a descripon or part
number of the replacement parts required.

QUICK START GUIDE 2023 - CIRCUL-AIR CABINET DRYERS
208 & 240 V DRYERS, 1PH & 3PH North America
14 | P a g e
COPYRIGHT © 2023 CIRCUL-AIR CORPORATION ALL RIGHTS RESERVED
[e-mail]
[e-mail]
1-800-795-1150