Gas Supply And Piping - Polaris GAS WATER HEATER Installation, Operation And Service Manual

GENERAL INFORMATION
DANGER
THIS WATER HEATER IS EQUIPPED FOR
ONE TYPE OF GAS ONLY. DO NOT USE THIS
WATER HEATER WITH ANY GAS OTHER
THAN THE ONE LISTED ON THE DATA
PLATE LOCATED ON THE WATER HEATER
JACKET. FAILURE TO USE THE CORRECT
GAS CAN RESULT IN PROPERTY DAMAGE,
BODILY INJURY, OR DEATH.
TABLE 2
NATURAL GAS PIPE CAPACITY TABLE (CU. FT./HR)
Capacity of gas pipe of different diameters and lengths in cu. ft. per hr. with pressure drop of 0.3 in.
and specific gravity of 0.60 (natural gas).
Nominal
Iron Pipe
Size, Inches
10 20
1/2 132 92
3/4 278 190
1 520 350
1-1/4 1050 730
1-1/2 1600 1100
After the length of pipe has been determined, select the pipe size which will provide the minimum cubit feet per hour required for the gas input rating of the water
heater. By formula:
Cu. Ft. Per Hr. Required =
The gas input of the water heater is marked on the water heater data plate. The heating value of the gas (BTU/FT3) may be determined by consulting the local
natural gas utility.
TABLE 3
LP GAS PIPE CAPACITY TABLE
Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum gases (at 11 inches water column inlet pressure). Based on a Pressure
Drop of 0.5 Inch Water Column.
Nominal iron
pipe size, in.
10 20
1/2 275 189
3/4 567 393
1 1071 732
1-1/4 2205 1496
Example: Input BTU requirement of the water heater, 100,000 BTUH
Total pipe length, 80 feet = 3/4" IPS required.

GAS SUPPLY AND PIPING

GAS PIPING
This water heater must only be connected
to gas supplied by a commercial supplier.
Install the gas piping according to all local and
state codes or with the "National Fuel Gas
Code", ANSI Z223.1 (NFPA 54) - Latest
Edition.
Do not use copper or brass piping and fittings.
Do not use flexible connectors. Use only rigid
pipe.
Table 2 and or Table 3 are provided as a
sizing reference for commonly used gas pipe
materials. Consult the "National Fuel and Gas
Code" for the recommended gas pipe size of
other materials.
Length of Pipe, Feet
30 40 50 60
73 63 56 50
152 130 115 105
285 245 215 195
590 500 440 400
890 760 670 610
Gas Input of Water Heater (BTU/HR)
Heating Value of Gas (BTU/FT³)
Len
gth of Pipe, Feet
30 40 50
152 129 114
315 267 237
590 504 448
1212 1039 913
70 80 90 100
46 43 40 38
96 90 84 79
180 170 160 150
370 350 320 305
560 530 490 460
60 70 80 90
103 96 89
217 196 185
409 378 346
834 771 724
DANGER
THE GAS LINE MUST BE OF ADEQUATE
SIZE SO AS TO PREVENT UNDUE
PRESSURE DROP AND NEVER SMALLER
THAN THE PIPE SIZE TO THE GAS VALVE
ON THE WATER HEATER. FAILURE TO
PROPERLY SIZE THE GAS LINE CAN
CAUSE A FIRE OR EXPLOSION RE-
SULTING IN PROPERTY DAMAGE, BODILY
INJURY OR DEATH.
125 150 75 200
34 31 28
72 64 59
130 120 110
275 250 225
410 380 350
100 125 150
83 78 69 63
173 162 146 132
322 307 275 252
677 630 567 511
26
55
100
210
320
17