- PURPOSE
1.1 This engineering standard defines the design and material selection requirements for dry- indoor environment analyzer panels.
- SCOPE
2.1 This standard applies to all dry-indoor environment analyzer panels. Analyzer selection shall be as directed in Air Products standard 3PS05009.
- RELATED DOCUMENTS
3.1 Air Products Engineering Documents
3PS05009 ASU Analyzer Sample System Requirements
- PANEL TYPE
4.1 All indoor analyzer panels shall be of the modular type. Rittal Type TS8, system model
#8438.510 is Air Products’ preferred supplier and panel type for [600 mm (23.65″) W x 2000 mm (78.74″) H, x 800 mm (31.5″)D].
4.2 Panels could have a maximum of three analyzers per panel, height permitting.
4.3 When a larger indoor panel is required because of analyzer size, Rittal Type TS8, system model #8806.500 is Air Products preferred supplier and panel type for [800 mm (31.5″) W x
2000 mm (78.74″) H x 800 mm (31.5″)D].
- FACE OF PANEL LAYOUT
5.1 Coordinate with process controls engineer on the analyzers general layout in the panel.
5.2 A maximum centerline elevation of 1676 mm (66 in) shall be maintained for the top analyzer in all panels.
5.3 All sample selector switches shall be mounted below the related analyzer.
5.4 All analyzer flowmeters shall be mounted below or side on analyzer.
5.5 All selector switches shall maintain a centerline dimension of 90 mm (3 1/2 in) between items and 75 mm (3 in) in elevation.
- SELECTOR SWITCH SAMPLING SYSTEMS
6.1 The primary sample (Sample 1) selector switch shall be a 2-position, 30.5 mm, Type 4/13, selector switch, non-illuminated, white, knob Lever, with 1 NO-1 NC maintained contacts. Selector switch to have a nameplate. A LED cluster pilot light, 30.5 mm, 2 color (Green/Red),
24V AC/DC full voltage pilot light. Cluster light to have a nameplate and shall be installed above selector switch.
6.2 The auxiliary sample and calibration gas selector switches shall be a 3-position, 30.5 mm, Type 4/13, selector switch, non-illuminated, white, knob lever, with 1 NO-1 NC maintained contacts. Selector switch to have a nameplate.
- AC POWER DISTRIBUTION
7.1 All analyzers shall use 120 VAC regulated power.
7.2 Fusible switch blocks, with Bussman Type “ABC” or equivalent fuses shall be used for power distribution to each analyzer.
7.3 When an analyzer is furnished with a three-wire power cord, a 20A duplex receptacle shall be used and mounted in close proximity to the instrument. A nameplate shall be installed as close as practical and shall denote function.
7.4 When multiple analyzers are equipped with a three-wire power cord a surge suppression style multiple outlet strip shall be mounted in the panel, refer to panel BOM for power strip manufacturer and part number. Refer to panel wiring drawing for installation details.
- GROUNDING
8.1 All analyzers shall be grounded to the plant grounding ring, as detailed on electrical schematics.
- ELECTRICAL CONTROL DEVICES
9.1 When an analyzer is indicated on the flowsheet as having a hardwired “Bypass” switch, a 2- position, 24 VDC or 120 VAC, selector switch, shall be required. Verify the voltage before adding to the panel design.
9.2 Relay selection shall be based on the coil voltage (24 VDC or 120 VAC) and the number of contacts required (2-8). This information can be obtained from the wiring schematics.
9.3 All 120 VAC relays shall have a surge suppressor and all 24 VDC relays shall have a rectifier diode across the coil for noise suppression.
9.4 Terminal blocks and related hardware shall be as referenced on the panel Bill of Material.
9.5 All terminal blocks shall be numbered consecutively. The ac and dc terminal strips shall be segregated within the panel.
- PAINTING
10.1 The designer shall check with Project Engineering before the start of any design for possible customer requested color; otherwise Rittal’s standard color is acceptable for all analyzer panels.
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