Natural Gas; Pipe Sizing; Supply Pressure Requirements - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 7 - GAS PIPING
7.2.

Natural Gas

7.2.1 Pipe Sizing

Refer to Table 2 below for schedule 40 metallic pipe
length and diameter requirements for natural gas,
based on rated EXALT input (divide by 1,000 to obtain
cubic feet per hour).
• Table 1 is based on Natural Gas with a specific
gravity of 0.60 and a pressure drop through the gas
piping of 0.30"w.c.
• For additional gas pipe sizing information, refer to
National Fuel Gas Code (NFPA 54 / ANSI Z223.1)
for installations in the U.S. or CAN/CSA B149.1 for
installations in Canada.

7.2.2 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.
Model Venturi Diameter
110 Solo 22mm
155 Solo 24mm
199 Solo 26mm
155 Combi 24mm
199 Combi 26mm
Length of Pipe in Feet
SCH 40
10
20
30
40
50
75
100
150
40
Table 1 - Natural Gas Venturis
Top injector
NG Ø3.6 mm
NG Ø4 mm
NG Ø4.2 mm
NG Ø4 mm
NG Ø4.2 mm
Table 2 - 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
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 lockup pressure regulator
for 13"w.c maximum.
WARNING
DO NOT adjust or attempt to measure gas valve
outlet pressure. The gas valve is factory-set for
the correct outlet pressure. 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 can
result in damage to the valve, causing substantial
property damage, serious injury, or death.
WARNING
The EXALT is factory equipped with the required
natural gas venturi. The natural gas venturi must
never be modified or replaced with a different size
venturi. Failure to use the required natural gas
venturi can result in substantial property damage,
serious injury, or death.
Bottom Injector Label Colour
NG Ø3.4 mm White
NG Ø3.9 mm White
NG Ø5 mm White
NG Ø3.9 mm White
NG Ø5 mm White
1"
520
350
285
245
215
175
150
120
•
Part No.
EXRKIT07
EXRKIT09
EXRKIT11
EXRKIT09
EXRKIT11
1-1/4" 1-1/2"
1050 1600
730 1100
590 890
500 760
440 670
360 545
305 460
250 380