34
C. GAS TABLE
Refer to the following table to size the supply piping to minimize pressure drop between meter or
regulator and unit.
Maximum capacity of pipe in cubic feet of gas per hour for gas pressures of .5 psi or less and a pressure
drop of .3” water column:
Table 3
It is recommended that a soapy solution be used to detect leaks. Bubbles will appear on the pipe to
indicate a leak is present. To avoid excessive pressure drop, the gas piping must be sized for the proper
flow and length of pipe. Both the gas meter and regulator must be properly sized for the total gas load. If
you experience a pressure drop greater than 1” WC, the meter, regulator, and/or gas line is undersized or
needs service. By removing the cap, you can attach a manometer to the incoming gas drip leg. The gas
pressure must remain between 3.5” WC and 14” WC during stand-by (static) mode and while in operating
(dynamic) mode at full output.
If an in-line regulator is used, it must be installed a minimum of 10
feet from the heater.
It is very important that the gas line is properly purged by the gas supplier or utility. Failure to
properly purge or size the lines will result in ignition failure.
This problem is especially noticeable in
NEW LP installations and empty tank situations. This can also occur when a utility company shuts off
service to an area to provide maintenance to their lines. The gas valve must not be replaced with a
conventional gas valve under any circumstances. As an additional service feature, the gas valve in this
appliance has a flanged connection to the swirl plate and blower.
D. GAS VALVE
Figure 16 – LP-314-M
Summary of Contents for Versa Hydro PHE130-119
Page 23: ...23 Figure 5 Figure 6 ...
Page 24: ...24 Figure 7 ...
Page 25: ...25 F HYDRONIC PIPING Figure 8 ...
Page 26: ...26 Figure 9 ...
Page 27: ...27 Figure 10 ...
Page 28: ...28 Figure 11 ...
Page 29: ...29 Figure 12 ...
Page 32: ...32 F INTERNAL WIRING Figure 14 Internal connection diagram ...
Page 38: ...38 Figure 17 ...
Page 48: ...48 Figure 25 ...
Page 76: ...76 Figure 29 ...
Page 77: ...77 Figure 30 ...
Page 78: ...78 Figure 31 LP 314 G ...
Page 79: ...79 Figure 32 ...
Page 81: ...81 ...
Page 82: ...82 ...
Page 83: ...83 MAINTENANCE NOTES ...