270NH3.MAN.REVD.062019
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6.0
Installation
The Ammonia Converter is typically bolted to the side of a probe enclosure, which provides all the structural
support necessary. Interfacing to the stack, connecting to sample bundles, and termination of electrical wiring
is done through the probe assembly. The probe mounts to a flange face, which should be vertical or canted
slightly to allow any entrained liquid in the sample to drain back into the stack. The probe tube should extend
into the center third of the stack.
Heated sample line bundles should be supported externally to the probe housing, such that no weight is
transferred to the enclosure wall. Connect the two sample tubes to the appropriate fittings before and after
the converter. Unheated portions of these tubes should be kept to a minimum to avoid condensation. The cal
gas input line connects directly to the check valve on the side of the chamber. The blowback instrument air
tubing connects to the fitting close to the accumulator sphere. If an external air line is to be utilized, use a
bulkhead fitting in the side of the probe enclosure for support.
Electrical terminals in the probe enclosure provide connections to the converter heater and thermocouple.
Drawings in the back of this manual should be used for reference only, since wiring of different probe models
will vary slightly. Always be sure that the power supplied to the probe and the NH
3
converter matches the
voltage requirement shown on the serial number tag. Type K thermocouple extension wire should be used in
the bundle to connect to the temperature controller. A solid state relay may be necessary in the heater
control process. Approximately 1250 watts of power is required. An independent ground wire should be run
to the grounding terminal in the probe enclosure.
Secure the enclosure and ensure that the sample tubing is kept at a temperature above the dew point of the
gas all the way to the cooler/dehydrator.
