Gas Pressure Regulator - Raypak 133 Installation & Operating Instructions Manual

/ 1 " 2
N
0133 15 35
- 15
*0182/0181
- 10
*0260/0261
*0330/0331
*0400/0401
0 5 1 4
0 6 2 4
0 7 2 4
0 8 2 4
0926/0962
1083/1125
1178/1223
1287/1336
1414/1468
1571/1631
1758/1826
2100
2500
3001
3500
4001
* Models 0181, 0261, 0331, and 0401 are Low NOx units and are not available in propane.
A minimum of 7" WC and a maximum of 10.5" WC upstream pressure under load, and no load conditions must be provided for natural gas
or a minimum of 11" WC and a maximum of 13" for propane.
Pressure drops from the no load condition to the full load condition must be no more than 30% for proper operation.

Gas Pressure Regulator

The gas pressure regulator located in the gas valve is
preset nominally at 4" WC for natural gas, and 11" WC
for propane. Between the gas valve and the burners is
a 1/8" pipe plug. The pressure at this point, taken with
a manometer, should be about 3.7" WC natural gas
and 10.5" WC propane. Models 0181, 0261, 0331, and
0401 should be 3.9 WC natural gas. If an adjustment
is needed, turn adjustment screw clockwise to
increase pressure, or counter-clockwise to decrease
pressure.
Venting of Diaphragm Gas
Components
Gas train components that have diaphragms in their
construction are supplied with a bleed line connection
that must be connected to the outside atmosphere as
required by the National Fuel Gas Code. Under NO
circumstances shall bleed lines terminate in the gas
utilization equipment flue or exhaust system. Care
should be used to prevent obstruction to the bleed
lines, as blocked lines could prevent gas valves or
other devices from operating.
MAXIMUM EQUIVALENT PIPE LENGTH
NATURAL GAS 1000 BTU/Cubic Foot
PROPANE GAS 2500 BTU/Cubic Foot
3/4" " 1
P N P N P
60 145 200 500
30 65 95 250
20 40 60 140
- 15 25 35 85
- - 15 25 60
- 1 0 1 5 3 5
- - 1 0 2 5
- - - 2 0
- - - 1 5
- - - 15
- - - 10
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
Table G: Maximum Equivalent Pipe Lengths
.60 SPECIFIC GRAVITY @ 0.5" W.C. PRESSURE DROP
1.53 SPECIFIC GRAVITY @ 0.6" W.C. PRESSURE DROP
- 1 / 1 " 4 1-1/2"
N P N P N
400 - - - -
250 560 - -
150 380 360 - -
100 260 250 - -
6 5 1 5 0 1 3 0 3 6 0 5 0
4 5 1 0 0 9 5 2 5 0 3 4
3 5 8 0 7 5 1 8 0 2 6
2 5 6 0 5 5 1 3 0 1 8
20 45 45 110 150
15 35 35 80 120
- 25 25 60 85
- 25 20 55 75
- 20 15 45 65
- 15 15 35 50
- 15 10 30 40
- 10 10 25 30
- - - 15 20
- - - 10 15
- - - - 10
- - - - 5
Fig. 20: Bleed Line Connection
21
2" 2-1/2" 3"
P N P N
- - - -
- - - -
- - - -
- - - -
0 - - - -
0 - - - -
0 6 0 0 - - -
5 4 8 0 5 0 0 - -
360 400 - -
300 300 - -
220 200 - -
180 170 325 560
150 165 300 500
120 125 250 400
100 100 225 340
80 75 175 260
55 55 135 160
35 40 85 120
30 30 45 80
20 25 35 65
4"
P N P
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
400 600 -
250 500 -
200 400 600
160 300 400