Owner's manual

After all connections have been made and before
starting up the system, ensure that all housings,
plugs,covers,etc.havebeeninstalled.
7.0 STARTUP AND OPERATION
TO ENSURE SAFE AND RELIABLE OPERATION,
DO NOT EXCEED THE MAXIMUM OUTLET
TEMPERATURE OF 40°C AND DO NOT ALLOW
THE AIRFLOW TO DROP BELOW THE MINIMUM
AIRFLOW AS SHOWN ON THE PRODUCT
NAMEPLATE.
7.1 Turn on the airow through the duct heater. Ensure that
the minimum airow, as shown on the product nameplate, is
maintainedatalltimes.
7.2 Theeldinstalledexplosion-proofdifferentialpressureswitch
may require eld adjustment. Consult manufacturer’s operation
instructionsincludedwiththismanual.
THE PRESSURE DIFFERENTIAL SWITCH IS A CRITICAL
SAFETY COMPONENT. IMPROPER SETTING OF THE SWITCH
MAY RESULT IN HAZARDOUS CONDITIONS.
7.3 Applypowertothecontrolpanel.
7.4Turnthecontrolon/offswitchto“On”.
7.5 Setthetemperaturecontrollertothedesiredsetpoint.Donot
exceedthemaximumoutlettemperatureof40°C.
7.6 Ensure that the temperature controller is working properly.
Consultthemanufacturer’soperationinstructionssuppliedwiththe
temperaturecontroller.
7.7 Except whenpurchasing acontrolpanel toaccompanyyour
XDFheater,thehighlimitsetpointsmustbesetintheeld.Table
2givesthemaximumhighlimitsetpointsforsafeoperationofthe
heater.Forinitialstart-up,setthehighlimitcontrollerstothevalues
indicatedinTable2.
TO PREVENT UNSAFE OPERATION OF THE
HEATER, DO NOT EXCEED THE MAXIMUM
HIGH-LIMIT SET POINTS. OPERATION OF
THE HEATER WITH HIGH LIMIT SET POINTS
GREATER THAN THOSE SHOWN IN TABLE 2
CREATES A SIGNIFICANT RISK OF EXPLOSION.
Table2-MaximumHighLimitSetPoints
6.0 WIRING
Whenever hazardous materials are present,
ensure that the terminal housing covers, plugs,
etc., are secured (but not overtightened) before
energizing the heater.
All circuits must be in the open position before
removing junction or terminal box covers.
Use supply wires suitable for 90°C. Supply wires
are to be fused with appropriately sized HRC
fusing.
Use approved conduit and conduit seals as
required by hazardous location standards.
Ensure that no power is connected to the
equipment prior to making any connections.
6.1 Theheaterisfactoryprewiredtosupplyterminalblocksinthe
heaterterminalhousingready fordirectconnectiontothepower
supply.Theheateralsocontainsone(1)highlimitthermocouple
perheatingbankthatmustbewiredtothecontrolequipment.
For double bank heaters, Heater Bank #1 is dened as the
inlet bank and Heater Bank #2 is dened as the outlet bank.
This distinction is important in order to ensure proper high
limit set limit set points must be set in the eld. Table 2 gives
the maximum high limit set points for safe operation of the
heater. For initial start-up, set the high limit controllers to the
values indicated in Table 2.
6.2Towiretheheatertothecontrolequipment,makethefollowing
connections at theconnection points indicated on the assembly
drawing:
a) 1¼”NPTconduitentrieshavebeenprovidedineachheater
terminalhousingforwiringthepowersupplyandgroundto
theheaters.Connecttheheatingbank(s)tothecontactor(s)
inthecontrolpanel.
b) ¾”NPTconduitentrieshavebeenprovidedoneachheater
bank for wiring the J type high limit thermocouple(s) to
Certied,manual-resethighlimitcontroller(s)inthecontrol
panel. Using appropriate thermocouple extension wire,
connect the thermocouple(s) to the high limit controllers,
ensuring proper connection of the positive and negative
leads.
c) Connect the “Normally Open” contacts of the supplied
pressure differential switch to the interlocks in the control
circuit.
MI289REV.2.01Page3of4
CCIThermalTechnologiesInc.2721PlymouthDrive,Oakville,ONL6H5R5Tel.(905)829-4422Fax(905)829-4430
www.ccithermal.com
Temperature Code
Heater Bank #1 (Inlet)
Heater Bank #2 (Inlet)
T2D T3A T3B
201(94) 172(78) 149(65)
257(125) 212(100) 181(83)
High Limit Set-Point °F (°C)