Westinghouse WBRCNG140F Installation Manual Page 26
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26
WHL-015 REV. 12.17.14
3. LP (Liquid Propane) Gas Pipe Sizing
The following is intended for use for piping between a Single or Second Stage (Low Pressure) Regulator and the appliance. The
following tables list maximum capacity of pipe in cubic feet of gas per hour for an inlet pressure of 11 inches water column and specific
pressure drop of 0.5 inches water column based on 1.5 specific gravity for liquid propane.
Maximum Liquid Propane Delivery Capacity – Length of Corrugated Stainless Steel Pipe in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
129
91
74
64
58
53
45
41
31
28
¾”
303
216
177
153
137
126
109
98
75
69
1”
605
425
344
297
265
241
208
186
143
129
1 ¼”
971
661
528
449
397
359
307
270
217
183
1 ½”
1990
1400
1140
988
884
805
696
621
506
438
2”
4640
3290
2680
2330
2080
1900
1650
1480
1210
1050
Table 13 – Liquid Propane Delivery Capacity – Corrugated Stainless Steel Pipe – Refer to ANSI Z223.1 – National Fuel Gas
Code, Latest Edition
Maximum Liquid Propane Delivery Capacity – Length of Black Iron Pipe (Sch. 40 Metallic) in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
291
200
160
137
122
110
101
94
84
67
¾”
608
418
336
287
255
231
212
197
175
140
1”
1150
787
632
541
480
434
400
372
330
265
1 ¼”
2350
1620
1300
1110
985
892
821
763
677
543
1 ½”
3520
2420
1940
1660
1480
1340
1230
1140
1010
814
2”
6790
4660
3750
3210
2840
2570
2370
2200
1950
1570
Table 14 – Liquid Propane Delivery Capacity – Black Iron Pipe – Refer to ANSI Z223.1 – National Fuel Gas Code, Latest Edition
B. GAS CONNECTION REQUIREMENTS
1. The gas connection fitting on the appliance is ½” male NPT. A ½” X ¾” Bell Coupling has been provided with the appliance to aid
installation. NOTE: The pipe size must not be less than ½”.
2. The supply line must be sized for the maximum output of the appliance being installed. If there are additional gas appliances from the
main supply line, measure the size of the supply line according to the COMBINED total maximum BTUH draw for the appliances as if
they were operating at the same time.
3. Measure the length of the gas supply line from the gas meter to the appliance. Appliance must be installed downstream of the gas
meter to ensure adequate gas supply. Use the tables in this manual or refer to the gas line manufacturer’s sizing information to
determine the correct supply pipe size.
4. A manual gas shut-off valve should be installed in the gas supply line close to the appliance. See Figure 14 for detail.
5. To facilitate any future maintenance, it is also recommended that an approved gas union fitting be installed in the supply line between
the shut-off valve and the connection on the appliance.
6. Test the gas pressure to make sure it meets the minimum standards and does not exceed the maximum standards of the appliance.
7. Leak test the gas line pipe before placing the appliance in operation. Only use approved leak detector liquid solutions to check for
leaks.
8. Do not operate the appliance until all connections have been completed and the heat exchanger is filled with water.
- Gas Fired 1
- Residential 1
- Combi Boiler 1
- FOREWORD 4
- FOR THE INSTALLER 4
- TABLE OF CONTENTS 4
- PART 2 – SAFETY REGULATIONS 8
- B. IMPROPER COMBUSTION 9
- E. WATER QUALITY 10
- F. FREEZE PROTECTION 10
- A. UNCRATING THE APPLIANCE 13
- C. LEVELING 15
- PART 5 – VENTING 18
- B. APPROVED VENT MATERIALS 20
- E. VENT TERMINATION 22
- SAFETY INSTRUCTIONS 23
- PART 7 – GAS PIPING 25
- PART 8 – WATER PIPING 27
- B. DHW PIPING 28
- D. CIRCULATOR SIZING 32
- E. PRESSURE RELIEF VALVE 33
- B. WIRING INFORMATION 34
- C. DIP SWITCHES 35
- Figure 25 – Ladder Diagram 37
- A. CONTROL PANEL 40
- B. LCD DISPLAY DESCRIPTIONS 40
- C. START-UP SEQUENCE 40
- F. CHANGING THE CH SET-POINT 41
- G. STORAGE MODE 42
- H. STATUS DISPLAY MODE 42
- I. INSTALLER MODE 43
- J. ERROR MODE 45
- K. ERROR TREE ANALYSIS 48
- M. 0-10 VOLT INPUT 50
- B. CHECK FOR GAS LEAKS 51
- WHAT TO DO IF YOU SMELL GAS 52
- E. PURGE AIR FROM DHW SYSTEM 53
- G. CONDENSATE REMOVAL 54
- PART 13 – TROUBLESHOOTING 57
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