Design and Installation Guide - CT.gov

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Section 3: System Configuration 34 August 2010 SIZING RUN “E” Run “E” is sized by the load of all supplied appliances and the run length from the meter to the farthest regulator The total load of all appliances is 28 + 25 = 53CFH The run length to the farthest regulator is 45 + 20 = 65ft Referring to Table 7-10 (2psi with a 1psi drop): for a 70-ft run, 3/8" CSST has a capacity over 53CFH (93 actual) NOTE: Gastite ® recommends that trunk lines be 1/2" minimum. Therefore, this trunk run should be upsized to 1/2". Gastite Division 603 Hendee Street / Springfield, MA 01104 800.662.0208 / www.gastite.com / gastite@gastite.com
Section 3: System Configuration 3.2.7 Example 6 - Series System – 7"WC - Hybrid Gastite Division 603 Hendee Street / Springfield, MA 01104 800.662.0208 / www.gastite.com / gastite@gastite.com August 2010 Figure 3-14 below shows a typical single-family house retrofit installation with five (5) appliances, 2 of which are added onto an existing black pipe system. The piping is arranged in series with a main run branching at the appliances. The utility company’s supply pressure (downstream of the meter) is 7"WC. The utility company advises that the specific gravity of the gas delivered will be 0.60 and the energy content is 1 CFH = 1000 BTUH. The allowable pressure drop across the system has been determined to be 2.0"WC (supply pressure 7"WC - appliance requirement 5"WC). Fig. 3-14 Note: Rigid pipe sized using a 0.5"WC pressure drop table, as no 2.0"WC pressure drop table for Rigid pipe is available. Table 3-7 Section Description Load Delivered by Section Section Length Run Length Tube Size “A” – Rigid Trunk 221 CFH = 221,000 BTUH 40 feet 70 feet 1" Rigid “B” – Rigid Trunk 141 CFH = 140,000 BTUH 5 feet 70 feet 1" Rigid “C” – Rigid Trunk 105 CFH = 105,000 BTUH 10 feet 70 feet 3/4" Rigid “D” – CSST Trunk 53 CFH = 53,000 BTUH 10 feet 70 feet 1/2" CSST “E” – BBQ 25 CFH = 25,000 BTUH 5 feet 70 feet 1/2" CSST “F” – Furnace 80 CFH = 80,000 BTUH 10 feet 50 feet 3/4" Rigid “G” – Water Heater 36 CFH = 36,000 BTUH 10 feet 55 feet 3/8" Rigid “H” – Range 52 CFH = 52,000 BTUH 10 feet 65 feet 1/2" Rigid “J” – Dryer 28 CFH = 28,000 BTUH 5 feet 70 feet 1/2" CSST Run Length for Trunk Sections = Distance from meter to furthest appliance (Longest Run) Run Length for Appliance Sections = Distance from meter to each appliance SIZING RUN “A” Run “A” is sized by the total load of all appliances and the run length from the meter to the furthest appliance The total load of all appliances is 80 + 36 + 52 + 28 + 25 = 221CFH The run length to the BBQ (furthest appliance) is 40 + 5 + 10 + 10 + 5 = 70ft Referring to Table 7-20 (Rigid pipe 0.5"WC pressure drop): for a 70ft run, 1" Rigid pipe has a capacity over 221CFH (actual: 240) SIZING RUN “B” Run “B” is sized by the total load of all supplied appliances and the run length from the meter to the furthest appliance The total load of the supplied appliances is 36 + 52 + 28 + 25 = 141CFH The run length to the BBQ (furthest appliance) is 40 + 5 + 10 + 10 + 5 = 70ft Referring to Table 7-20 (Rigid pipe 0.5"WC pressure drop) for a 70ft run, 1" Rigid pipe has a capacity over 141CFH (actual: 240) 35
Page 1 and 2: C O M M E R C I A L • I N D U S T
Page 3 and 4: Table of Contents SECTION 1.0 INTRO
Page 5 and 6: Section 1: Introduction SECTION 1.0
Page 7 and 8: Section 1: Introduction 1.1 General
Page 9 and 10: Section 2: System Components Gastit
Page 11 and 12: Section 2: System Components 2.2 Co
Page 13 and 14: Section 2: System Components 2.2.2
Page 23 and 24: Section 2: System Components Gastit
Page 25 and 26: Section 3: System Configuration 3.1
Page 37: Section 3: System Configuration 3.2
Page 49 and 50: Section 3: System Configuration Gas
Page 51 and 52: Section 3: System Configuration Gas
Page 53 and 54: Section 4: Installation Practices S
Page 59 and 60: Section 4: Installation Practices 4
Page 61 and 62: Section 4: Installation Practices G
Page 63 and 64: Section 4: Installation Practices G
Page 69 and 70: Section 4: Installation Practices f
Page 73 and 74: Section 4: Installation Practices R
Page 79 and 80: Section 5: Inspection, Repair and R
Page 81 and 82: Section 6: Pressure / Leakage Testi
Page 83 and 84: Section 7: Sizing Tables and Pressu
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Section 7: Sizing Tables and Pressu
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Section 8: Definitions SECTION 8.0
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Section 9: Dimensional and Technica
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Section 9: Dimensional and Technica
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Section 10: Warranty SECTION 10.0 W
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NOTES Gastite Division 603 Hendee S
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August 2010 GASTITE ®/FLASHSHIELD
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Gastite Division 603 Hendee Street
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