*Not required for “floating” draft control applications Preferred Instruments – Draft Controller Model JC-22D Burner interface wiring and JC-22D adjustment must be performed by an experienced burner service technician. WARNING An independent High Flue Gas Pressure cutout switch or Low Draft cutout switch MUST be incorporated into the Flame Safeguard shutdown interlock circuitry. With sealed, pressure tight boilers or combustion chambers, outlet pressure is typically monitored. On balanced draft units, the pressure transmitter typically monitors the furnace pressure. The JC-22XMTR-xxCO, or a similar 2 wire 4-20 mA transmitter, is used to sense and transmit the pressure to the JC-22D. The JC-22D Controller monitors boiler / burner flue gas pressure and maintains the pressure at a constant Setpoint by modulating an outlet damper.
#Preferred instruments draft control operatiin manual manual#
This manual is intended to be used by operators, instructors and service engineers. INTRODUCTION This manual is intended to describe the installation, operation and troubleshooting of a JC-22D Sequence Draft Controller. 4 Control Mode Selection (Pre-Installation) Pg. Burner interface wiring and JC-22D adjustment must be performed by an experienced burner service technician.ĬONTENTS System Overview Pg.
The JC- 22XMTR-xxCO, or a similar 2 wire 4-20 mA transmitter, is used to sense and transmit the pressure to the JC-22D. 36 INTRODUCTION This manual is intended to describe the installation, operation and troubleshooting of a JC-22D Sequence Draft Controller.
Sequencing Draft Controller Model JC-22D Installation & Operation Instructions SDI-JC22D JPreferred Instruments Danbury, CT USA CONTENTS System Overview Pg.
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