6
V. Gas Piping
Table 5: Gas Ratings
For materials or conditions other than those listed
above, refer to
National Fuel Gas Code
, NFPA54/ANSI
Z223.1, or size system using standard engineering
methods acceptable to authority having jurisdiction.
Table 6: Specific Gravity Correction Factors for
Natural Gas
WARNING
Failure to properly pipe gas supply to boiler may
result in improper operation and damage to the
boiler or structure. Always assure gas piping is
absolutely leak free and of the proper size and
type for the connected load.
An additional gas pressure regulator may be
needed. Consult gas supplier.
A.
Size gas piping
. Design system to provide adequate gas
supply to boiler. Consider these factors:
1. Allowable pressure drop from point of delivery to
boiler. Maximum allowable system pressure is ½
psig. Actual point of delivery pressure may be less;
contact gas supplier for additional information.
Minimum gas valve inlet pressure is stamped on
the rating label located in the boiler’s vestibule
compartment.
2. Maximum gas demand. Refer to the boiler’s input as
printed on its rating label. Also consider existing and
expected future gas utilization equipment (i.e. water
heater, cooking equipment).
3. Length of piping and number of fittings. Refer to
Table 7 for maximum capacity of Schedule 40 pipe.
Table 8 lists equivalent pipe length for standard
fittings.
4. Corrections for the specific gravity of natural gas
can be found in Table 6.
NOTICE
PVG boilers built for altitudes greater than 4,999 feet above sea level need to be specially orificed to adjust for
changes in atmospheric conditions. The PVG boiler “H” Model has been certified to operate in atmospheric
conditions from 5,000 to 10,000 feet above sea level. Input is derated by 10% for applications at 5,000 feet
above sea level, and 0% for applications at 10,000 feet above sea levels. Derate is based on % reduction
per 1000 feet.
The PVG boiler is available in two (2) altitude Models: The “S” Model 0 to 4,999 feet above sea level, and the
“H” Model 5,000 to 10,000 feet above sea level.
For applications above 10,000 feet, consult the manufacturer.
Specific
Gravity
Correction
Factor
Specific
Gravity
Correction
Factor
---
---
0.85
0.81
---
---
0.90
0.82
0.60
1.00
1.00
0.78
0.65
0.96
1.10
0.74
0.70
0.93
1.20
0.71
0.75
0.90
1.30
0.68
0.80
0.87
1.40
0.66
Boiler
Model
Number
Natural/LP
Maximum
Gas Pressure
(in. w.c.)
Minimum Natural
Gas Pressure
(in. w.c.)
Inlet to Gas Valve
Minimum LP
Gas Pressure
(in. w.c.)
Inlet to Gas Valve
Natural
Manifold
Pressure
(in. w.c.)
LP
Manifold
Pressure
(in. w.c.)
PVG-3
14
4.5
11.5
3.5
10.5
PVG-4
PVG-5
PVG-6
PVG-7
PVG-8
PVG-9
Summary of Contents for PVG
Page 6: ... Figure 2 Dimensions ...
Page 14: ...14 Figure 4A Recommended Horizontal Vent Installation ...
Page 15: ...15 Figure 4B Alternate Horizontal Vent Installation ...
Page 16: ...16 Figure 5 Horizontal Vent Terminal Configuration 3 or 4 Vent ...
Page 18: ...18 Figure 7 Attic Offset Figure 6 Vertical Vent Installation ...
Page 24: ...24 Figure 11 Recommended Boiler Piping For Circulator Zoned Heating Systems ...
Page 25: ...25 Figure 12 Recommended Water Piping for Zone Valve Zoned Heating Systems ...
Page 30: ...30 Figure 14 Internal Boiler Wiring Schematic Diagram ...
Page 33: ...33 Figure 16 Single Heating Zone Only Wiring Schematic ...
Page 35: ...35 Figure 18 Circulator Zoned System Wiring Schematic ...
Page 36: ...36 Figure 19 Zone Valve Zoned System Wiring Schematic ...
Page 37: ...37 Figure 20 Different Manufacturer s Zone Valve Connections to Honeywell R8889 ...
Page 39: ...39 Figure 21 Modular Boiler Piping ...
Page 41: ...41 Figure 22 Operating Instructions ...
Page 44: ...44 Honeywell Electronic Ignition Troubleshooting Guide Figure 24 Troubleshooting Guide ...
Page 49: ...49 Figure 30 Flue and Burner Cleanout 1 Burner ...
Page 51: ...51 THIS PAGE LEFT BLANK INTENTIONALLY ...
Page 52: ...52 ...
Page 53: ...53 ...
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Page 66: ...66 SERVICE RECORD DATE SERVICE PERFORMED ...