Omega Engineering SH73343 User manual

OPERATING INSTRUCTIONSOMEGA
M3688 0701
Page 1
SH SERIES
Air Heaters
MODEL NUMBERS
SH-73343
SH-73344
SH-73345
SH-73346
SH-73347
SH-73348
⇒ FOR SAFETYAND LONG HEATER LIFE, CAREFULLY READ THIS MANUALBEFORE USE.
Description
Compact, safeandversatile heating unit for heating air orinert gas up to 1400°F.The SH-Series is available in
wattages from 6kWto 36kW,and can be use with compressed air or a regenerative blower. The SH heater is
designed for closed-loop temperature control, with a solid-state relayor phase angle fired SCR power control.
Sensors insidetheheater sense bothelement temperature and inletairtemperatureand limit heatervoltage and
prevent element burnout if airflowis suddenlyreduced. With this system, full power maysafelybe applied to the
system with zero airflow. If operated correctly, the heater element will operate continuously for 5000 hours or longer.
Specifications
• Max. Static Pressure: 10 PSI
• Max. Exit Air Temp: 1400°F
• Max. Inlet AirTemp: 130°F
• Exit Connection:1-1/2"NPT
• Inlet Connection: 1-1/4” NPT
• Control:Closed Loop: 4-20mADC or Pulsed DC (3-32V, etc.)
• Over-Temp Circuit: Dual-Input Limit Card mounted on a 6” x3.15” x1.6” deepsnap track.
Mount track to control cabinet using two #8 mountingscrews, drilled 5.63”O.C.
System (Heater
+ Over-Temp) kW Max. VoltsMax. Amp DrawReplacement Element P/N
SH-73343 6 240-1 phase 25.0 SH-73351
SH-73344 6 480-3 phase 7.2 SH-73352
SH-73345 10 240-1 phase 41.7 SH-73353
SH-73346 10 480-3 phase 12.0 SH-73354
SH-73347 18 480-3 phase 21.7 SH-73355
SH-73348 36 480-3 phase 43.4 SH-73356
Safety
! SHOCK HAZARD Onlyqualified individualsshould install this heater and related controls. Followallapplicable
electrical codes and use properwiring.
! WARNING! Sensors are at or near line voltage. Use teflon jacketed, teflon insulated “K” thermocouple wire
to connect heater sensors to the over-temperature board.
! BURN/FIRE/EXPLOSION HAZARD Do not use with or nearexplosive or reactive gases.Avoid contact with the
side, or exposure to the exit-end, duringor soonafteroperation. DO NOTUSE NEAR VOLATILE OR
COMBUSTIBLE MATERIALS.

OPERATING INSTRUCTIONSOMEGA
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Precautions
! Use filtered air. Avoid grease,oil, or oil vapors, corrosive orreactive gaseswhich will damage heater.
! Use exposed junction type “K”thermocouple within one inch of the heater exit for good control.
Installation and Wiring
See attached drawings.
WARNING! Sensors are at or near line voltage. Use teflon jacketed, teflon insulated “K” thermocouple wire to
connect heater sensors to the over-temperature board.
1. Be sure heater issecurelymounted.
2. Followallapplicable electrical codes when mounting and wiring heater and control components.
Operation
1. Turn on air and setpressure or flowto desired operating level.
2. Turn on power to the over-temperature board.
3. Turn on power to the power controller.
4. Turn on power to the temperature controller.
5. Set desired temperature on temperature controller.
During operation, with steady-state airflow, the exit temperature should not varymore than a fewdegrees from set
point. Although the heater will not burn out with zero airflow, if the heater is operated in a vertical downward position
and an airflowof 100 SCFH or belowis run through the heater, the inlet temperature of the heater will exceed 150°F
and the Over-temperature board will begin to limitpower to the heater.
To Shut Down:
1. Turn off power to the temperature controller and the power controller.
2. Allowair to continue toflowfora minimum of 1minuteor until exit air temperatureis 150°C or less for
safety. Continue airflowlongerif hot equipmentcomponents present anypotential hazardto personnel.
3. Turn off airto the system.
Replacing Elements
Before replacing the element assembly, determine the cause of the element failure. Prior to powering the system
back up,make certain that theentire system is operating properly. Possiblecauses of element failure are:
1. Normal end of Life
2. Failure in Control System
3. Mechanical Damage to System
REPLACEMENT PROCEDURE
1. Turn off power to the system. Followlock-out/tag-outprocedures.
2. Unscrewthe 3 external housing screws and remove the stainless heater housing.
3. Unplug element from its socket and plug newelementinto the socket.
4. Slide the stainless heater housing back over the element andsecure housingwith the 3 external housing screws.
Performance Curves
The following curves showthe maximum temperature performanceof theSH-Series heater asmeasured bya “K”
type thermocouple located within 1” of heater exit. Use of other temperature measuring devices or varying the
distance of the measurementmaycause different temperature readings. The heaters will not generate temperatures
greaterthan indicatedon the graph in and if used correctlywill maintain operating life in excess of 5000 hours.

OPERATING INSTRUCTIONSOMEGA
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Warranty
Omega warrants that all products to be delivered hereunder will be free from defects in material and
workmanship at the timeof delivery. Omega's obligation under this warrantyshallbelimited to (at itsoption)
repairing, replacing, or granting acredit at the prices invoicedat the time ofshipment for anyof saidproducts.
This warrantyshall not applyto anysuch products which shall have been repaired or altered, except by
Omega, or which shall have been subjected. Omega shall be liable under this warranty only if (A)
Omega receives notice of the alleged defect within sixty (60) days after the date of shipment; (B) the
adjustment procedurehereinafter provided is followed, and (C) suchproducts are,to Omega’s
satisfaction, determined tobe defective.
THE WARRANTYSET FORTH IN THE PRECEDING PARAGRAPH IS EXCLUSIVE AND IN LIEUOF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUTLIMITATION, ANYIMPLIED WARRANTYOF
FITNESS FOR A PARTICULAR PURPOSE OR OF MERCHANTABILITY.
The informationcontainedinthismanualisbased on data consideredtobetrueand accurate.Reasonable
precautions for accuracyhas been taken in the preparation of this manual, however Omega assumes no
responsibilityfor anyomissions or errors, nor assumes anyliabilityfor damages that mayresult from the use of the
product in accordance with the information contained in this manual.
Please directall warranty/repair requests or inquiries with the following information,
in writing:
(A) Order number underwhich products were shipped
(B) Model/Serial Number of product
(C) Reasonfor rejection
PRODUCTS CANNOT BE RETURNED AUTHORIZATION.
Replacement, repair, or credit for products found to be defective will be made bythe place of purchase. All products
found to be not defective will be returned to the Buyer; transportation charges collect or stored at Buyers expense.
SH-Series Maximum Performance
(Measured by"K"thermocouple located 1"from heaterexitwith 70°F
inlet air)
0
200
400
600
800
1000
1200
1400
1600
01000 2000 3000 4000 5000 6000 7000 8000
AirFlow(SCFH)
Exit Temperature (° F)
6 KW
10 KW
18 KW
36 KW
Note:True airtemperatureis
approx.100°Fabove lines indicated.
Thermocouple readings tend to be lowerdue
to thermalmass/heatsink effects.

OPERATING INSTRUCTIONSOMEGA
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WIRING DIAGRAM
MOUNTING DIMENSIONS