Natural Gas; Pipe Sizing; Supply Pressure Requirements - Prestige Solo 110 Installation And Maintenance Manual

6.0 Gas Piping
6.2

Natural Gas

6.2.1 Pipe Sizing

Refer to Table 1 for schedule 40 metallic pipe
length and diameter requirements for natural
gas, based on rated PRESTIGE Solo input
(divide by 1,000 to obtain cubic feet per hour).
- Table 1 is based on Natural Gas with a spe-
cific gravity of 0.60 and a pressure drop
through the gas piping of 0.30"w.c..
- For additional gas piping sizing informa-
tion, refer to ANSI Z223.1. For Canadian
installations refer to B149.1 or B149.2.

6.2.2 Supply Pressure Requirements

1. Pressure required at the gas valve inlet
supply pressure port:
- Maximum 13"w.c. at flow or no flow
conditions to the burner.
- Minimum 5"w.c. during flow conditions
to the burner. Must be verified during
start up and with all other gas appliances
operating within the building.
2. Install 100% lockup gas pressure regulator
in the gas supply line if inlet pressure can
exceed 13"w.c at any time. Adjust the lock-
up pressure regulator for 13"w.c maximum.
Length of Pipe in
Feet
SCH 40
10
20
30
40
50
75
100
150
Table 1: Gas Piping Sizing - Natural Gas
Capacity of Schedule 40 Metallic Pipe in Cubic Feet of Natural Gas Per
Hour (based on 0.60 specific gravity, 0.30" w.c. pressure drop)
1/2" 3/4"
132 278
92 190
73 152
63 130
56 115
45 93
38 79
31 64
WARNING
DO NOT adjust or attempt to measure
gas valve outlet pressure. The gas valve
is factory-set for the correct outlet pres-
sure. This setting is suitable for natural
gas and propane and requires no field
adjustment. Attempts by the installer to
adjust or measure the gas valve outlet
pressure could result in damage to the
valve, causing potential severe personal
injury, death or substantial property
damage.
NOTI E
The natural gas orifice requirements are:
PRESTIGE Solo 80: 0.185" (4.7 mm)
PRESTIGE Solo 110: 0.242" (6.15 mm)
PRESTIGE Solo 155: None Required
PRESTIGE Solo 175: None Required
PRESTIGE Solo 250: None Required
PRESTIGE Solo 299: 0.421" (10.7 mm)
PRESTIGE Solo 399: 0.421" (10.7 mm)
1" 1-1/4"
520 1050
350 730
285 590
245 500
215 440
175 360
150 305
120 250
27
1-1/2"
1600
1100
890
760
670
545
460
380