valutazioni - 3, GPA: 3.3 ( )

Produttore : Roberts Gorden File Size : 2.16 mb File Nome : Lingua di insegnamento:

FIGURE 2: STANDARD REFLECTOR . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 20 48 20 11 51 122 51 CRV-B-4 4 20 48 20 11 51 122 51 CRV-B-6 4 20 48 20 11 51 122 51 CRV-B-8 4 20 48 20 11 51 122 51 CRV-B-9 4 36 60 36 11 92 153 92 CRV-B-10 4 36 60 36 11 92 153 92 CRV-B-12 4 36 60 36 11 92 153 92 CRV-B-12A 4 36 60 36 11 92 153 92 . FIGURE 3: ONE SIDE REFLECTOR . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 56 20 11 31 143 51 CRV-B-4 4 12 56 20 11 31 143 51 CRV-B-6 4 12 56 20 11 31 143 51 CRV-B-8 4 12 56 20 11 31 143 51 CRV-B-9 4 12 60 42 11 31 153 107 CRV-B-10 4 12 60 42 11 31 153 107 CRV-B-12 4 12 60 42 11 31 153 107 CRV-B-12A 4 12 60 42 11 31 153 107 FIGURE 4: TWO SIDE REFLECTORS . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 56 12 11 31 143 31 CRV-B-4 4 12 56 12 11 31 143 31 CRV-B-6 4 12 56 12 11 31 143 31 CRV-B-8 4 12 56 12 11 31 143 31 CRV-B-9 4 12 60 12 11 31 153 31 CRV-B-10 4 12 60 12 11 31 153 31 CRV-B-12 4 12 60 12 11 31 153 31 CRV-B-12A 4 12 60 12 11 31 153 31 SECTION 3: CLEARANCES TO COMBUSTIBLES NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the combustion chamber and the tube connect. FIGURE 5: UNIVERSAL SHIELD, POSITION 1 . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 12 12 11 31 31 31 CRV-B-4 4 12 12 12 11 31 31 31 CRV-B-6 4 12 12 12 11 31 31 31 CRV-B-8 4 12 12 12 11 31 31 31 CRV-B-9 8 18 24 18 21 46 61 46 CRV-B-10 8 18 24 18 21 46 61 46 CRV-B-12 8 18 24 18 21 46 61 46 CRV-B-12A 8 18 24 18 21 46 61 46 FIGURE 6: UNIVERSAL SHIELD, POSITION 2 . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 24 48 24 11 61 122 61 CRV-B-4 4 24 48 24 11 61 122 61 CRV-B-6 4 24 48 24 11 61 122 61 CRV-B-8 4 24 48 24 11 61 122 61 CRV-B-9 4 36 48 36 11 92 122 92 CRV-B-10 4 36 48 36 11 92 122 92 CRV-B-12 4 36 48 36 11 92 122 92 CRV-B-12A 4 36 48 36 11 92 122 92 FIGURE 7: UNIVERSAL SHIELD, POSITION 3 . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 56 30 11 31 143 77 CRV-B-4 4 12 56 30 11 31 143 77 CRV-B-6 4 12 56 30 11 31 143 77 CRV-B-8 4 12 56 30 11 31 143 77 CRV-B-9 8 12 60 42 21 31 153 107 CRV-B-10 8 12 60 42 21 31 153 107 CRV-B-12 8 12 60 42 21 31 153 107 CRV-B-12A 8 12 60 42 21 31 153 107 CRV-SERIES DESIGN MANUAL NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the combustion chamber and the tube connect. FIGURE 8: 2-FOOT DECO GRILLE . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 48 12 11 31 122 31 CRV-B-4 4 12 48 12 11 31 122 31 CRV-B-6 4 12 48 12 11 31 122 31 CRV-B-8 4 12 48 12 11 31 122 31 CRV-B-9 4 18 56 18 11 46 143 46 CRV-B-10 4 18 56 18 11 46 143 46 CRV-B-12 4 18 56 18 11 46 143 46 CRV-B-12A 4 18 56 18 11 46 143 46 FIGURE 9: BARRIER SHIELD . . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 12 12 12 11 31 31 31 CRV-B-4 4 12 12 12 11 31 31 31 CRV-B-6 4 12 12 12 11 31 31 31 CRV-B-8 4 12 12 12 11 31 31 31 CRV-B-9 - UNAPPROVED - UNAPPROVED CRV- B-10 - UNAPPROVED - UNAPPROVED CRV- B-12 - UNAPPROVED - UNAPPROVED CRV- B-12A - UNAPPROVED - UNAPPROVED FIGURE 10: PROTECTIVE GRILLE . . . Model A (inches) B C D A (centimeters) B C D CRV-B-2 4 20 48 20 11 51 122 51 CRV-B-4 4 20 48 20 11 51 122 51 CRV-B-6 4 20 48 20 11 51 122 51 CRV-B-8 4 20 48 20 11 51 122 51 CRV-B-9 4 36 60 36 11 92 153 92 CRV-B-10 4 36 60 36 11 92 153 92 CRV-B-12 4 36 60 36 11 92 153 92 CRV-B-12A 4 36 60 36 11 92 153 92 SECTION 4: SIZING AND DESIGN CONSIDERATIONS SECTION 4: SIZING AND DESIGN CONSIDERATIONS The building heat loss must be calculated in accordance to accepted energy load calculation methods. ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) offers in-depth information that is useful in calculating energy loads. The CRV-Series system input is determined in concert with the required radiant adjustment to heat loss and height adjustment factors. 4.1 Radiant Adjustment to Heat Loss The practice of applying an adjustment factor to heat loss calculations for radiant heating systems is well known within the radiant heating industry, having been used by manufacturers for over 25 years. A number of studies have been conducted to identify the values of the adjustment factor in the range of 0.8 to 0.85 depending on efficiency (higher efficiency uses lower factor). This adjustment can be more thoroughly understood when considering the following radiant effect issues: • Infrared energy heats objects, not the air. • Lower ambient temperatures reduce the amount of air infiltration. • Less air stratification with radiant heat. • Lower ambient air temperatures reduce the transmission heat loss through walls and roof. • Elevated floor temperature provides a thermal reserve capacity. • Increased mean radiant temperatu...

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