SCE SCE-HE24W120V User manual

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Table of Content SCE-HE24W120V
1. User manual 2 ..................................................................................................................................
2. Legal regulations 2 .........................................................................................................................
3. Safety instructions 3 ......................................................................................................................
4. Settings 4 .........................................................................................................................................
5. Functional principle 7 .....................................................................................................................
6. Technical data 7 ..............................................................................................................................
7. Performance graph 8 ......................................................................................................................
8. Mounting 9 .......................................................................................................................................
9. Mounting Principle 10 .....................................................................................................................
10. Cut out dimensions 11 ..................................................................................................................
11. Dimensions (H x W x D) 12 ..........................................................................................................
12. Wiring diagram 13 .........................................................................................................................
13. Taking into operation 14 ..............................................................................................................
14. Trouble shooting 14 ......................................................................................................................
15. Maintenance & Cleaning 14 .........................................................................................................
16. Transport & Storage 15 ................................................................................................................
17. Parts supplied / Spare parts / Accessories 16 ..........................................................................

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1. User manual
This instruction manual contains information and instructions to enable the user to work safely, correctly and
economically on the unit. Understanding and adhering to the manual can help one:
Avoid any dangers.
Reduce repair costs and stoppages.
Extend and improve the reliability and working life of the unit.
PLEASE ENSURE TO USE THE RIGHT VERSION OF THE INSTRUCTION MANUAL SUITABLE FOR YOUR
UNIT.
Intended use
󰾬The unit is to be used exclusively for the dissipation of heat from control cabinets and enclosures in order to
protect temperature sensitive components in an industrial enviorment. To meet the conditions of use, all the
information and instructions in the instruction manual must be adhered to.
General danger
Indicates compulsory safety regulations which are not covered by a specific
pictogram such as one of the following.
󰾬
High electric voltage
Indicates electric shock danger.
Important safety instruction
Indicates instructions for safe maintenance and operation of the unit.
Attention
Indicates possible burns from hot components.
Attention
Indicates possible damage to the unit.
Instruction
Indicates possible danger to the environment.
2. Legal regulations
Liability
The information, data and instructions contained in this instruction manual are current at the time of going to
press. We reserve the right to make technical changes to the unit in the course of its development. Therefore,
no claims can be accepted for previously delivered units based on the information, diagrams or descriptions
contained in this manual. No liability can be accepted for damage and production caused by:

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Disregarding the instruction manual
Operating error
Inappropriate work on or with the unit
The use of non-specified spare parts and accessories
Unauthorised modifications or changes to the unit by the user or his personnel
The supplier is only liable for errors and omissions as outlined in the guarantee conditions contained in the main
contractual agreement. Claims for damages on any grounds are excluded.
3. Safety instructions
Upon delivery the unit is already meeting current technical standards and can therefore be safely taken into
operation. Only authorised personnel is allowed to work on the unit. Unauthorised personnel must be prohibited
from working on the unit. Operating personnel must inform their superiors immediately of any malfunction of
the unit.
Please note that before starting to work on or with the unit, a procedure must be carried out inside the cabinet
on which the unit is to be mounted.
Before commencing work inside the cabinet, the control cabinet manufacturer's instruction must be read with
regards to:
Safety instructions.
Instructions on taking the cabinet out of operation.
Instructions on the prevention of unauthorised cabinet reconnection.
The electric equipment meets the valid safety regulations. One can find dangerous voltages (above 50 V AC or
above 100 V DC)
Behind the control cabinet doors.
On the power supply in the unit housing.
The unit has to be operated according to the type plate and the wiring diagram, and must be protected
externally from overloading and electrical faults via suitable protective devices.
Danger through incorrect work on the unit
The unit can only be installed and maintained by technical competent and qualified personnel,
using only supplied material according to the supplied instructions.
󰾬
Danger from electrical voltage
Only specialised personnel are allowed to maintain and clean the unit. The personnel must
ensure that for the duration of the maintenance and cleaning, the unit is disconnected from
the electrical supply.
Attention
Damage to the unit through the use of inappropriate cleaning materials. Please do not use
aggressive cleaning material.
Instruction
Damage to the environment through unauthorised disposal. All spare parts and associated
material must be disposed according to the environmental laws.

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4. Settings
Air-air heat exchangers are intended as complementary accessories to large industrial equipment which include
a motor-operated fan or blower together with a heat exchanger module. These may also include an electric
heater. The fan or blower is intended to recirculate air and allow heat exchange. The heat exchanger is
designed for air heat transfer only. Cooling function may be controlled by an on-board or remote controller or
thermostat. Heating function, when installed is provided by an electrical heating element.
The unit seals the cabinet which ensures that the clean air inside does not come into contact with the ambient
air which may well be dirty or polluted. The unit is fit for purpose within the rated/declared ambient conditions
(e.g. dusty and oily air or high air temperatures between 23°F and 131°F), also indicating the rated allowable
ingress and environment. Heat exchangers are used where the heat generated by energy losses in control
cabinets must be conducted away to protect temperature-sensitive components. The characteristic graph
shown in the section “Performance graph” applies to external (ambient) air as the coolant. In air-to-air heat
exchangers, the internal temperature of the control cabinet cannot be cooler than the ambient
temperature. There are natural limits to the cooling performance, dependent on the air supply temperature and
the requirement for a temperature difference of at least 9°F. Unlike systems in which the heat generated is
allowed to escape by air convection through ventilation slots, with the heat exchanger, the clean air inside the
control cabinet is prevented from mixing with the air outside, which may well be unclean.
Controller
The display shows the temperature in the range of -50°C to +150°C (-58°F to +302°F). The temperature is
displayed with resolution of tenths between -19.9°C and +99.9°C (-3.8°F to +211.8°F). During programming, it
shows the codes and values of the parameters. The display also shows icons according to occurring events.
Display icons
Icon Function Description
1Cooling relay active Flashes when activation
is delayed or inhibited by
protection times, external
disabling or other procedures
in progress
2Alarms relay active
3Heating relay active
4Ambient blower relay active
Alarm Flashes when alarms are active
Heating mode Signals operation of unit in heating mode
Cooling mode Signals operation of unit in cooling mode
TEST Test mode in progress Activated only by manual procedure

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Programming
The operating parameters can be modified using the front keypad. Access differs depending on the type of
parameter. Access to configuration parameters is protected by a password that prevents unwanted
modifications or access by unauthorised persons.
Setting cooling set point, St1:
1. Press “SET” and display should show St1 and then the pre-set value of St1. (default: +35°C / +95°F)
2. Reach the desired value by using ▲ or ▼.
3. Press “SET” again to save the new value of St1.
Setting heating set point, St2 (only for units supplied with internal heater):
1. Press “SET” twice slowly and display should show St2 and then the pre-set value of St2. (default: +5°C /
+41°F)
2. Reach the desired value by using ▲ or ▼.
3. Press “SET” again to save the new value of St2.
󰾬Setting temperature unit, low temperature alarm and high temperature alarm:
1. Press “PRG” button for 5 seconds to reach the modifiable parameter list.
2. Use ▲ or ▼ to reach the desired parameter:
C18 for temperature unit of measure
°C = 0
°F = 1
P25 for low temperature alarm threshold (default -10°C / +14°F)
P26 for high temperature alarm threshold (default +55°C / +131°F)
3. Press “SET” on the desired parameter to display the current value.
4. Use ▲ or ▼ to reach the desired value.
5. Pressing “SET” temporarily saves the new value and returns to the parameters list.
6. Repeat steps 2-5 to set other parameters.
7. Press “PRG” for 5 seconds to permanently save the new values.
Test function
Different test functions can be used depending on the combination of keys pressed. Such tests run for the

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duration of 4 minutes.
“SET+▲” tests cooling relays.
“SET+▼” tests Alarms and Heater relays
Important Notes
Whilst programming, if no button is pressed for 10 seconds, the display starts flashing, and after 1 minute
returns to the main display without saving changes.
To increase scrolling speed, press and hold the ▲ or ▼ button for at least 5 seconds.
When pressing “PRG” for 3 seconds, the firmware revision code is displayed for 2 seconds.
When cleaning the controller panel, do not use ethanol, hydrocarbons, ammonia or their by-products.
Use neutral detergents and water.
󰾬󰾬󰾬󰾬󰾬󰾬󰾬

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5. Functional principle
6. Technical data
Order Number SCE-HE24W120V
Heat exchanger performance 24 W/F
Operating temperature range 23°F - 131°F
Air volume flow (system / unimpeded) Ambient air circuit: 182 / 500 cfm
Cabinet air circuit: 182 / 500 cfm
Mounting Wall mounted
Housing Material Mild steel, powder coated
Dimension H x W x D 47 x 10 x 6 inch
Weight 36.8 lbs
Voltage / Frequency 120 V ~ 60 Hz
UL Voltage / Frequency 120 V ~ 60 Hz
Starting current 2.2 A
Max. current 1.8 A
Max. power 195 W
Fuse 3 A (T)
Connection 8 pin connector
Ingress protection IP 54 / NEMA 3, 3R
Approvals CE, cURus

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7. Performance graph

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8. Mounting
Danger from electrical voltage
The unit must be mounted by specialist personnel (qualified electricians). The personnel must ensure that the
cabinet is disconnected from the electrical supply for the duration of the mounting operation. Therefore take the
cabinet out of operation, following the relevant instructions before mounting work commences.
Danger through incorrect work on the unit. Only specialists are allowed to put the unit into operation.
Mounting preparations
Several points must be checked before the unit can be mounted. These checks must be made to ensure safety
and the trouble-free operation of the unit. These checks must be carried out with absolute thoroughness to
ensure that the unit works perfectly.
Transport damage check
On delivery the carton containing the unit must be examined for signs of transport damage. Any transport
damage to the carton could indicate that the unit itself has been damaged in transit which in the worst case
could mean that the unit will not function.
Location and space requirements
The location of the cabinet must allow for sufficient air circulation to and from the unit. The unit should be
mounted roughly horizontally. It is therefore advisable to check that the cabinet is in a horizontal position. The
max. deviation from the vertical or horizontal should not excess 20 degrees.
Sealing
To guarantee that the unit works perfectly ensure that, the control cabinet is completely sealed (min. NEMA 12)
and a good seal exists between the control cabinet and the unit. If necessary the cabinet mounting surface
should be reinforced.

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9. Mounting Principle
1 Heat exchanger
2 Mounting gasket
3 Slotted stud M6 x 1 inch
4 Enclosure
5 Washer A6.4
6 M6 Lock nut

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10. Cut out dimensions

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11. Dimensions (H x W x D)

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12. Wiring diagram
Power connector
1 L
2 N
3 PE
4 Alarm (NO)
5 Alarm (COM)
6 Alarm (NC)
7 Door contact
8 Door contact

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13. Taking into operation
As described in the chapter “Technical information”, the unit is controlled in relation to the cabinet internal
temperature. The required cabinet temperature can be set on the potentiometer on the controller.The
temperature adjustment range is between 32°F (left-hand stop) and 140°F (right-hand stop). The thermostat is
pre-set at 95°F.
To adjust the cabinet internal temperature proceed as follows:
Remove the MCB access plate on the front of the unit.
Using a screw driver turn the adjustment wheel on the potentiometer “TEMP” slightly to the right (higher)
or to the left (lower).
Please note that the setting for the alarm signal should be at least 41 - 50°F higher than the setting for
the cabinet internal temperature.
Check that the new adjustment meets the necessary requirements. If necessary, repeat the procedure. Inspect
and if necessary replace the MCB access plate sealing tape.
14. Trouble shooting
In case of a fault logon to our website www.saginawcontrol.com to locate your nearest servicing office or find
your nearest contact in the chapter “contacts” in this manual.
15. Maintenance & Cleaning
Danger from electrical voltage
Maintenance and cleaning must be carried out by specialists
(electricians). The personnel must ensure that for the duration of this
work the unit and the cabinet are disconnected from the electrical
supply and protected against unauthorised reactivation.
Danger through incorrect work on the unit.
The instructions in the cabinet manufacturer’s manual must be adhered
to!
Damage to the unit through incorrect maintenance and
repair! Maintenance and repair must be carried out by the
manufacturer or another specialist.
Fan replacement
The rated life expectancy of the fan is L10 =30,000 hours under normal operating conditions.
To replace the internal or external fan, please proceed as following:
Remove the internal access panel by unscrewing the 10 fixing screws.
Disconnect the blower cables from the connectors.
Unscrew the four screws fixing the blower bracket to the cabinet.
Unscrew the fan from the bracket.
Re-assembly with the new blower is in reverse order.
Make sure that the blower cable length is the same as the one of the removed fan to ensure that the cable does
not come in contact with the blower while in operation. Make sure that the correct polarity is maintained. (Refer
to circuit diagram). Inspect and if necessary replace the internal access panel sealing tape.
In addition the unit should have regular functional tests (approx. every 2,000 hours depending on the grade of
ambient pollution).

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16. Transport & Storage
Malfunction due to transport damage
On delivery the carton containing the unit must be examined for signs of transport damage.
Any transport damage to the carton could indicate that the unit itself has been damaged in
transit which in the worst case could mean that the unit will not function.
Storage conditions
The unit can only be stored in locations which meet the following conditions:
Temperature range: 104°F to 158°F
Relative humidity (at 77°F): max. 95%
Returning the unit
Damage to the unit through incorrect transport.
To avoid transport damage the unit should be returned in the original packing or in a packing
case and must be strapped to a pallet!
If the unit cannot be returned in the original packing please ensure that:
A space of at least 30 mm. must be maintained at all points between the unit and the external packing.
The unit must be firmly fixed in the packing.
The unit must be protected sufficiently by shock absorbing padding (hard foam corner pieces, strips or
cardboard corner pieces).

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17. Parts supplied / Spare parts / Accessories
Description QTY Image
Instruction manual 1
CE Declaration 1
Mounting template 1
M6 * 25 Slotted stud 6
A6.4 washer 6
M6 nuts 6
Drain pipe 1
Silicone washer 1
Drain fitting 1
Female connector 1
Saginaw Control and Engineering
95 Midland Road
Saginaw, MI 48638
Phone: 989 / 799-6871
Fax: 989 / 799-4524
[email protected]