Summary of Contents for Hoffman PCFF1YZ
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Page 1: Table Of Contents
Hoffman Purge/Pressurization Manual for Models PCFF1YZ PCFB1YZ This manual covers Y/Z - Purge with Continuous Flow CONTENTS: 1. Specification Sheet – CF Y/Z – Purge/Pressurization Unit 2. Application Suitability 3. Installation, Operation and Maintenance for CF Units Section 0. Description and Principle of Operation Section 1. - Page 2 1. Specification Sheet – Hoffman Purge/Pressurization Units Model No. (Example): P CF B 1 YZ (Note: Not all codes are applicable) Purge Unit Type Purge/Pressurization Unit Approvals / Certifications Purging Method Europe CF = Continuous Flow EN 60079-0, EN 60079-2,...
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Page 3: Application Suitability
Y-Purge Units may be used in IECEx, ATEX Zone 1(21) - Category 2 and NEC 500 Class I, Div 1. Hoffman Purge/Pressurization Units may be used for hazards of any gas group. However, apparatus associated with the Hoffman Purge/Pressurization Unit, such as Non-Incendive, Intrinsically Safe signaling circuits and flameproof enclosures containing switching devices may be limited in their gas group. -
Page 4: Section 0 Description And Principle Of Operation
PE, the necessary purging volume, and the Chained”, the Outlet Orifice must be fitted on the last time to be allowed for purging, using the chosen Hoffman enclosure with the Purge Inlet to the first enclosure. The RLV Purge/Pressurization Unit purging flow rate. -
Page 5: Section 2 Operation Of The Unit
"volt-free contacts" within the PE. Exception: Power to Inert Gas Supply Intrinsically Safe, or other apparatus, which is already suitable for the location, need not be isolated by the Hoffman 1.2.1 The source of the compressed air must be in a non- Purge/Pressurization unit. When utilizing "Y/Z"... -
Page 6: Section 3 Maintenance Of The Unit
12 months old, parts under warranty should accomplished by turning the FCV in a counterclockwise be returned to Hoffman for investigation, with a full report of direction. the fault and the unit Serial number. NOTE: As with any... - Page 7 Flow Sensor needs re-calibrating it can either be returned to the 2.4” (60mm) diameter diaphragm and, by using a finger, Hoffman for this service or it can be done by the user as block the threaded hole in the top of the valve module. The follows: valve should operate and the indicator should turn Green.
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Page 8: Drawings
4. Drawings Quick Installation Guide – PCFB1YZ Connect isolated air supply to Control Unit With aid of supplied mounting template, cut Ensure enclosure door is closed, fully latched and mounting holes into enclosure. Ensure that free of leaks Control Unit and Relief Valve are diagonally opposed. - Page 9 Quick Installation Guide – PCFF1YZ...
- Page 10 Turn on 60 PSIG (4 bar) air supply (115 PSIG/8 bar max) Slowly increase Flow Control Valve until Alarm Indicator turns from RED to GREEN 10. After Purge time has been completed power can be applied to the enclosure 11. Refer to manual for assistance PCFF1YZ...
- Page 11 Spark Arrestor/Orifice Relief Valve Drawing...
- Page 12 Relief Valve Position Relief Valve Cutout Schematic for both PCFB1YZ and PCFF1YZ...
- Page 13 Alarm Switch (Signals) Zone 2 /Division 2 “Alarm”: Dry, VFC, SPSTN/O Contact Hermetically Sealed Switch NI – Ex nA Non-incendive Circuits Ex m IIC T4 Gc <254 V ac rms =254 Vac rms < 1 A 0.7 A Zone 1 or 2 / Division 1 or 2 IS –...
- Page 16 Hoffman Enclosures, Inc 2100 Hoffman Way Anoka, Minnesota 55303-1745 USA Phone: 763 422-2211 www.hoffmanonline.com P/N 89108870 Dwg 89109562 A...