RBI 8900 Series Installation & Operation Manual

Also see for 8800 Series: Installation & operation manual Installation and operation manual Installation and operation instructions

Contents

SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS Page 5Figure 1 - Vertical Venting Using A Metal Chimney And Inside Air (8900/8800 Series)10 FT 3.4 m2 FT .6 m3 FT 1 m3 FT 1 m5 FT 1.52 mRIOM-40Where communicating with the outdoors throughhorizontal ducts, each opening shall have a minimumfree area of 1 in2/2000 Btu/hr, 1100 mm2/kW of the totalinput rating of all of the equipment in the enclosure.When ducts are used, they must have the same cross-sectional area as the free area of the opening to whichthey connect.Canadian installations must comply with CSA B149.1when air supply is provided by natural air flow from theoutdoors for natural draft, partial fan-assisted, fan-assisted, or power draft-assisted burners, there shallbe a permanent air supply opening(s) having a cross-sectional area of not less than 1 in 2 per 7,000 Btuh(310 mm2 per kW) up to and including 1 million Btuh,plus 1 in2 per 14,000 Btuh (155 mm2 per kW) in excessof 1 million Btuh.When calculating the free area necessary to meetthe make-up air requirements of the enclosure,consideration must be given to the blockage effectsof louvers, grills and screens. Screens must havea minimum mesh size of 1/4 in, 6.4 mm. If the freearea through a louver or grill is not known, ductsshould be sized per Table 2.Table 2 - Make-up Air Louver SizingRequired Cross Sectional AreaInput 1/4 in 6.4 mm 75% Free Area 25% Free Area(MBH) Wire Screen Metal Louvers Wooden Louversin 2 cm2 in2 cm2 in2 cm2420 105 677 140 903 420 2710530 133 858 177 1142 530 3419630 158 1019 210 1355 630 4064735 184 1187 245 1581 735 4742840 210 1355 280 1806 840 5419950 238 1535 317 2032 950 61291050 263 1697 350 2258 1050 67741160 290 1871 387 2497 1160 74841260 315 2032 420 2710 1260 81291370 343 2213 457 2948 1370 88391470 368 2374 490 3161 1470 94841580 395 2548 527 3400 1580 10,1941685 421 2716 562 3626 1685 10,8711790 448 2890 597 3852 1790 11,5481900 475 3065 633 4084 1900 12,2582000 500 3226 667 4303 2000 12,9032400 600 3871 800 5161 2400 15,4832800 700 4516 933 6019 2800 18,0643200 800 5161 1067 6884 3200 20,6453600 900 5806 1200 7742 3600 23,2264000 1000 6452 1333 8600 4000 25,806