Suburban Dynaline 3 A&E Manual 12/2021 Rev.2
17
Dynaline
™
3 chassis are factory equipped with a 3/8" NPT gas connection
located at the bottom left front corner. Gas piping used to make the gas
connection to the unit must be purchased locally. The size of the pipe should be
computed according to type of gas and length of run. (See
Table 5
.) See
Figure
14
for location of gas connection on the chassis when installed into
the wall sleeve.
Table 5
gives a reasonably accurate size for the gas service line. The quantities in
the table are for cubic feet per hour. To convert BTU capacity to cubic feet, divide
total BTU load by the BTU value of the gas being used. The table is for Natural
gas only. To convert to Propane gas, multiply by .633.
The pressure drop caused by other gas appliances being served must be
considered. If the new line is a take-off from an existing line to another
appliance, pressure drop computation with the table must include the
demand of the other appliance.
Gas supply pressure for purposes of input adjustment
Minimum
Maximum
Natural Gas
5" Water Column
7" Water Column
Propane Gas
11" Water Column
13" Water Column
Table 4
MAKING GAS
CONNECTIONS
INSTALLATION DATA
Capacity of pipe of different
diameters and lengths in cubic
feet per hour with pressure drop
of 0.3 inches and specific gravity
of 0.60 inches.
Iron Pipe Sizes (IPS) Inches
Pipe
Length
(feet)
1/2
3/4
1
1 1/4 1 1/2
10
132 278 520 1,050 1.600
20
92
190 350 730 1,100
30
73
152 285 590 890
40
63
130 245 500 760
50
56
115 215 440 670
60
50
105 195 400 610
70
46
96
180 370 560
80
43
90
170 350 530
90
40
84
160 320 490
100
38
79
150 305 460
125
34
72
130 275 410
150
31
64
120 250 380
175
28
59
110 225 250
200
26
55
100 210 320
Table 5
All units are equipped with a valve having a built-in regulator. For units
burning Natural gas, the regulator is preset at 3.5" W.C. pressure. For units
burning LP gas, the regulator is preset at 10.5" W.C. pressure.
It is recommended that a shut-off valve be installed in the gas line to
the unit, and that a ground joint union also be installed.
NOTE: Manual shut-off valve to be supplied by installer.
A condensate trap should also be installed in the gas supply line as
close to the unit as possible.
To occasionally monitor the gas
supply pressure to the unit, install a
1/8" NPT plug tap for test gauge
connection immediately upstream
of the gas supply connection to the
unit. The unit must be disconnected
from the gas supply piping system
during any pressure testing of the
gas supply system at test pressures
equal to or greater than 1/2 PSIG.
Figure 14
Operating Pressure
