Lochinvar CREST 2.5, Дополнительное руководство

Страница: 6 / 20

6
Table 1A First Stage Piping at High Pressure_10 PSI
The gas piping must be sized for the proper flow and length of
pipe, to avoid excessive pressure drop. Both the gas meter and
the gas regulator must be properly sized for the total gas load.
If you experience a pressure drop greater than 1 inch w.c.
(249 Pa), the meter, regulator, or gas line is undersized or in
need of service. Perform the steps below when checking inlet
gas supply:
1. Turn the main power switch to the “OFF” position.
2. Shut off gas supply at the manual gas valve in the gas
piping to the appliance.
3. Remove the 1/8" pipe plug on the flange to the factory
supplied gas shutoff valve and install a suitable 1/8"
fitting (field supplied) for the manometer tubing. Place the
tubing of the manometer over the tap once the 1/8"
fitting is installed as shown in FIG.’s 1-1 and 1-2.
4. Slowly turn on the gas supply at the factory installed
manual gas valve.
5. Turn the power switch to the “ON” position.
6. Adjust the temperature set point on the control panel of
the SMART TOUCH control module to call for heat or
utilize Service Mode, see page 10 of this manual.
7. Observe the gas supply pressure as the burner fires at
100% of rated input. Percent of burner input will be
displayed on the Modulation Screen.
8. Ensure inlet pressure is within specified range.
Minimum and maximum gas supply pressures are
specified in this section of the manual.
9. If gas supply pressure is within normal range and no
adjustments are needed, proceed on to Step 11.
10. If the gas pressure is out of range, contact the gas utility,
gas supplier, qualified installer or service agency to
determine the necessary steps to provide proper gas
pressure to the control.
11. Turn the power switch to the “OFF” position.
12. Shut off the gas supply at the manual gas valve in the gas
piping to the appliance.
13. Remove the manometer from the pressure tap on top of
the gas valve. Remove the 1/8" (3 mm) field supplied
fitting and reinstall the pipe plug removed in Step 3.
DO NOT adjust or attempt to measure gas
valve outlet pressure. Attempting to alter
or measure the gas valve outlet pressure
could result in damage to the valve, causing
potential severe personal injury, death, or
substantial property damage.

WARNING
Check inlet gas supply
1
Gas connections
Dual Fuel Supplemental Manual
The Dual Fuel Crest is equipped with
two (2) inlet gas connections. Each
connection must be checked to ensure
proper operation.
NOTICE
Table 1B Second Stage Piping at Low Pressure_1/2 PSI
10 20 30 40 50 60 70 80 90 100 125 150
1/2 2442 1885 1580 1382 1240 1133 1048 979 921 872 775 703
Pipe 3/4 4831 3812 3230 2842 2561 2346 2175 2035 1917 1816 1618 1470
Size 1 8531 6916 5939 5270 4776 4392 4083 3829 3614 3429 3063 2789
(I.D.) 1 1/4 16626 13771 11963 10691 9736 8987 8378 7872 7443 7074 6336 5779
1 1/2 23670 19957 17510 15749 14407 13341 12470 11740 11119 10581 9501 8682
2 42521 36514 32398 29359 27001 25104 23538 22216 21082 20097 18104 16580
Nominal Iron Pipe
Size Inches
Length of pipe or tubing, feet
Maximum Capacities of Pipe in KBTUH/Hr
Notice: Capacities show n are for Natural Gas. Please consult supplier for proper gas pipe sizing for propane.
10 20 30 40 50 60 70 80 90 100 125 150
1 1/4 2205 1496 1212 1039 913 834 771 724 677 630 567 511
Pipe 1 1/2 3307 2299 1858 1559 1417 1275 1181 1086 1023 976 866 787
Size 2 6221 4331 3465 2992 2646 2394 2205 2047 1921 1811 1606 1496
(I.D.) 2 1/2 10140 7046 5695 4778 4343 3908 3618 3329 3160 2991 2654 2412
3 17990 12510 10110 8481 7708 6936 6422 5908 5608 5309 4711 4281
4 36710 25520 20620 17300 15730 14150 13100 12050 11440 10830 9613 8736
Nominal Iron Pipe
Size Inches
Length of pipe or tubing, feet
Maximum Capacities of Pipe in KBTUH/Hr
Notice: Capacities show n are f or Natural Gas. Please consult supplier f or proper gas pipe sizing f or propane.