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The preset temperature limit (SP) should always be set to a value higher than the modulating range of the burner. Otherwise, normal modulation of the burner may cause the burner to shut off prematurely.
The maximum limit for a single line heater is not the same as the limit for a heater with a manifold. On single line heaters set the maximum limit to at least 50 degrees F above setpoint of the modulating controller. On heaters with manifolds set the limit to at least 80 degrees F above the setpoint of the modulating controller.
The setpoint (SP) is not one of the settings shown in Figure 3. The settings shown in Figure 3 do not normally require any further change after the heater is put in service.
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Figure 3. Programming Honeywell
DC230L-EE-00-10-0A00000-20-0
high media temperature controller for Heatec HC and HCS heaters
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Group Prompt
(SET UP button)
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Function
Prompt
(FUNCTION button)
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Value or
Selection
(up / down arrows)
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Group Prompt
(SET UP button)
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Function Prompt
(FUNCTION button)
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Value or
Selection
(up / down arrows)
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LOCK
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SECUR
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0
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COM
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ComSTA
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LOCK
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CAL
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ComADR
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SHDTIM
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LIMIT
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Lo or Hi
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HIGH
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PARITY
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POWRUP
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NORM
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BAUD
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SP MAX
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500
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TX DLY
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SP MIN
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20.00
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UNITS
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DISPLY
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PROC
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LOOPBK
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INPUT1
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DECMAL
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8888
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ALARMS
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A1S1VA
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UNITS
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F
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A1S2VA
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IN1TYP
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J L
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A2S1VA
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XMITR1
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A2S2VA
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IN1 HI
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770
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A1S1TY
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NONE
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IN1 LO
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20.00
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A1S2TY
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NONE
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BIAS 1
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0.0
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A2S1TY
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NONE
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FILTR1
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1
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A2S2TY
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NONE
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BRNOUT
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UP
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A1S1HL
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EMIS
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A1S2HL
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FREQ
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60
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A2S1HL
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DISPLY
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A2S2HL
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ALHYST
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0.1
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OPTIONS
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AUXOUT
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ALARM1
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0 PCT
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BLOCK
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DIS
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100 PCT
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EXT RST
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