Rinnai RH180, Основы установки

Страница: 36 / 70

Gas Supply Sizing Procedure
Point of Delivery
(gas meter)
10 ft.
20 ft.
15 ft.
15 ft.
Schedule 40 Metallic Pipe, Natural Gas, less than 2 psi inlet
pressure, 0.5” w.c. pressure drop, 0.60 specific gravity.
Pipe Size (in.)
Nominal: ½ ¾ 1 1 ¼ 1 ½
Length
(ft)
Capacity in Cubic Feet of Gas per Hour
(CFH=Btu/1000)
60 65 137 257 528 791
10 ft.
36
10 ft.
5 ft.
Using the row for 60 ft on this
table, you can now determine
pipe sizes.
1. Outlet A, section 1 , can draw up
to 30,000 Btu. This section
requires ½” pipe minimum.
2. Outlet B, Section 2 , can draw
up to 75,000 Btu. This section
requires ¾” pipe minimum.
3. Outlets C and D, section 3 ,
share a common supply pipe
which can draw up to a total of
191,300 Btu. This section
requires 1” pipe minimum.
4. Section 4 is supplying outlets A, C and D.
These outlets can draw up to 221,300 Btu.
This section requires 1” pipe minimum.
5.
Section 5 is supplying all appliances. The
total Btu load for the home is 296,300 Btu.
This section requires 1 ¼” pipe minimum.
5.
4 .
Outlet A
gas fireplace
30,000 Btu/hr
Outlet B
range/oven
75,000 Btu/hr
Outlet C
RH180
91,300 Btu/hr
Outlet D
furnace
100,000 Btu/hr
1.
2.
3.