GOLD GV Water boiler series 3 — manual
V Gas piping
Connecting gas supply piping to boiler
Do not connect gas supply to boiler or attempt to operate boiler unless the correct orifice plate has been verified or installed in accordance with manual Section IIc.
Except where otherwise instructed in this manual, do not attempt to measure or adjust the outlet pressure setting of the gas valve. The gas valve is factory set to a slight negative pressure, and is operated as a
Failure to comply will result in malfunction of the boiler, causing severe personal injury, death or substantial property damage.
1.Refer to Figure 17 to connect gas supply to ½" npt boiler gas connection. Use wrench to hold factory- installed gas piping nipple.
2.Support piping with hangers, not by boiler or its accessories.
3.Purge all air from gas supply piping.
4.Before placing boiler in operation, check boiler and its gas connection for leaks.
Do not check for gas leaks with an open flame — use bubble test. Failure to use bubble test or check for gas leaks can cause severe personal injury, death or substantial property damage.
a.Close manual main shutoff valve during any pressure testing at less than 13" w.c.
b.Disconnect boiler and gas valve from gas supply piping during any pressure testing greater than 13" w.c.
5.Use pipe dope compatible with propane gases. Apply sparingly only to male threads of pipe joints so that pipe dope does not block gas flow.
Failure to apply pipe dope as detailed above can result in severe personal injury, death or substantial property damage.
Natural Gas:
1.Refer to Table 3 for pipe length and diameter. Size gas supply piping for total flow to all connected appliances. For each GV boiler, provide for the following gas flow (cfh = cubic feet per hour):
70 cfh | 140 cfh | ||
105 cfh | 175 cfh |
Table 3 is only for gas of specific gravity 0.60 at a pressure drop through the line of 0.3" w.c..For additional gas pipe sizing information, refer to ANSI Z223.1 (or CAN/CGA B149.1 orB149.2 for Canadian installations).
2.Inlet pressure required at gas valve inlet: maximum 13" w.c. minimum 4" w.c.
3.Install 100% lockup gas pressure regulator in supply line if inlet pressure exceeds 13" w.c. Adjust for 13" w.c. maximum.
Propane Gas:
1.Contact gas supplier to size pipes, tanks and 100% lockup gas pressure regulator.
2.Adjust propane supply regulator provided by gas supplier for 13" w.c. maximum pressure.
3.Inlet pressure required at gas valve inlet: maximum 13" w.c. minimum 4" w.c.
38 | Part number |