Rheem 802V SERIES, Installation Instructions Manual

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33
TABLE 8
SUPPLEMENTAL ORIFICE SIZE CHART
N ote s :
3. T hi s chart i s b a s ed on the N ationa l F ue l G a s C ode (NFGC) A nnex F b a s ed on natura l ga s with a s ecific gravity of 0.60
Sea Level
to 1,999'
2,000' to
2,999'
3,000' to
3,999'
4,000' to
4,999'
5,000' to
5,999'
6,000' to
6,999'
7,000' to
7,999'
8,000' to
8,999'
9,000' to
9,999' 10,000'
43 44 44 44 45 45 46 47 47 48
42 42 43 43 43 44 44 45 46 47
42 42 43 43 43 44 44 45 46 47
41 42 42 42 43 43 44 44 45 46
40
41
42
42 42 43 43 44 44 45
39
40 41 41 42 42 43 43 44 44
38 39 40 41 41 42 42 43 43 44
37
38 39 39 40 41 42 42 43 43
37 38 39 39 40 41 42 42 43 43
36
37 38 38 39 40 41 41 42 43
35
36 36 37 37 38 39 40 41 42
5. F urnace operation i s optimized when operating at de s ign rate . I n s ta ll er i s re s pon s i bl e to verify rate .
6. T hi s ta bl e app l ie s to 80 + mode ls on l y with 25 , 000BTU/B urner . DO
NOT
USE THIS CHART FOR ANY 90 + FURNACE MODEL.
NATURAL GAS ORIFICE SELECTION BASED ON HEATING VALUE & ELEVATION*
* T a bl e i s derived from A ppendix of the National Fuel Gas Code . T o determine the correct orifice for your in s ta ll ation con s u l t the National
Fuel Gas Code ta bl e s F.1 and F.4
2. I n s ta ll er mu s t b e aware of the l oca l heating va l ue (s ea l eve l s tandard ) to u s e the chart b e l ow .
4. T he recommended orifice s b e l ow a ll ow the furnace to operate within 10 % of de s ign rate . H owever, NFGC ca l cu l ation s are the b e s t
method .
1. All (-)80 + unit s are factory equiped with orifice s s ized for 1050 s ea l eve l heating va l ue ga s.
ELEVATION
G rey C e lls I ndicate F actory
O rifice S ize
Gas Heating
Value
(BTU's/ft
3
)
@ Sea
Level**
1 , 000-1 , 100
900-999
800-899
700-799
** B e s ure to u s e s ea l eve l heating va l ue . W hen reque s ting the heating va l ue from a l oca l uti l ity, it mu s t b e converted to s ea l eve l equiva l ent
in order to u s e thi s ta bl e .
HIGH ALTITUDE
NATURAL GAS AT HIGH ALTITUDES (cont.)
High Altitude