Weil Mclain Flame Guardian Wmbc 1A Users Manual 141807
WMBC-1A to the manual 4353bcd2-5397-439b-bbee-6b595d192b7f
2015-02-02
: Weil-Mclain Weil-Mclain-Flame-Guardian-Wmbc-1A-Users-Manual-454264 weil-mclain-flame-guardian-wmbc-1a-users-manual-454264 weil-mclain pdf
Open the PDF directly: View PDF 
.
Page Count: 11
| Download | |
| Open PDF In Browser | View PDF |
LGB Gas–fired boiler Control Supplement Flame Guardian WMBC-1A RM7895C Controller Electronic Pilot System IRI Contents I. Installation ..................... 2 II. Gas piping ...................... 5 III. Wiring ............................. 5 IV.Startup ......................... 10 V. Sequence of operation 11 VI.Parts list ....................... 12 Indicates presence of hazards that can cause severe personal injury, death or substantial property damage. Indicates special instructions on installation, operation or maintenance that are important but not related to personal injury or property damage. This Control Supplement must only be used by a qualified installer/service technician. Read these instructions completely before beginning the installation. Failure to follow these instructions can cause severe personal injury, death or substantial property damage. Part Number 550-141-807/0298 LGB (Series 2) — Control Supplement I Installation 1. For use with LGB-6 through 12 boilers. 2. LOCAL INSPECTOR MUST CERTIFY BOILER FOR IRI COMPLIANCE. 3. Assemble pilot burner and flame sensor to main burners with pilot brackets. See Figures 2 and 3. Install ground wiring as shown in Figures 2 and 3. 4. Reinstall burner assemblies. See Table 1 for pilot burner and flame sensor locations. 5. Assemble control panel to boiler. See Figure 1. 6. Install gas controls as shown in Figure 4, page 4. 7. IRI installations require manual reset controls. Weil-McLain recommends installing manual controls in addition to standard as required by local inspector. Refer to the LGB Boiler Manual, “Boiler Controls” section. a. Steam boilers require a manual reset Low Water Cutoff and manual reset Pressure Limit Control. b. Water boilers require a manual reset Low Water Cutoff and manual reset Temperature Limit Control. Table 1 Pilot burner and flame sensor locations Boiler Model LGB-6 LGB-7 LGB-8 LGB-9 LGB-10 LGB-11 LGB-12 Flame Sensor * Pilot Burner * 2 2 2 2 2 2 2 9 11 13 15 16 16 16 * From left burner. Figure 1 Mount control panel to jacket as shown Panel Front of Boiler Drill (3) Holes in Front Drill (7) 1/8“ Holes In Jacket to Mount Bracket Drill (4) Holes in Side 55BGL 2 Part Number 550-141-807/0298 Flame Guardian WMBC-1A Electronic Pilot System – IRI I Installation – continued Sensor Figure 2 10-32 x 5/16“ Machine Screws(2) Q179 Pilot Burner Igniter Q179 pilot burner assembly Locating Slot Ground Leadwire: Connect to WMBC Panel Terminal G2 (Ground Terminal) Pilot Mounting Bracket Burner Support Bar 10-32 x 1/4“ Machine Screws (2) Pilot Line Tubing Sensor Lead Igniter Lead LGB-A56 Figure 3 Flame Sensor Main flame sensor assembly Compression Union Main Burner (with Pilot Mounting Bracket) 6-32 x 5/16“ Type ”F” Self Tapping Screws(2) Locating Slot 10-32 x 5/16“ Machine Screws(2) Ground Leadwire: Connect to Main Flame Proving Module 24 V (GND) terminal Burner Support Bar Flame Sensor Mounting Bracket Sensor Lead Main Burner (with Pilot Mounting Bracket) LGB-A85 Part Number 550-141-807/0298 3 LGB (Series 2) — Control Supplement I Installation – continued Figure 4 Vent to Outside Atmosphere Service Valve IRI gas train schematic 3 5 7 6 Boiler Jacket 18 12 Drip Leg 2 1 18 4 17 9 11 10 8 13 14 15 16 GAS PIPING DIAGRAM - LGB (Series 2) IRI Gas Train 4 1 Manual main shut-off gas valve 10 Manual leak checking gas valve 2 Low gas pressure switch 11 Regulating diaphragm gas valve (two stage) 3 Pilot manual shut-off valve 12 High gas pressure switch 4 Motorized gas valve w/ on/off actuator 13 Main flame sensor 5 Pilot gas pressure regulator 14 Main burner with main flame sensor bracket 6 Normally open solenoid vent valve 15 Pilot burner 7 Pilot solenoid gas valve 16 Main burner with pilot burner bracket 8 Test cock 17 Adapter, for N. O. vent valve 9 Second motorized gas valve w/ on/off actuator 18 Pipe flanges Part Number 550-141-807/0298 Flame Guardian WMBC-1A Electronic Pilot System – IRI II Gas piping 1. Size gas piping considering: a. Diameter and length of gas supply piping. b. Number of fittings. c. Maximum gas consumption (including any possible future expansion). d. Allowable pressure drop from gas meter outlet to boiler. For pressure drops, see ANSI-Z223.1 – latest edition. 2. Size natural gas piping from table below. Size piping to provide proper inlet pressure to gas valve when operating at rated input. a. Inlet gas pressure to manual main shutoff gas valve minimum 7” W.C. standard (5½” on special order) – maximum 13” W.C. b. If pressure to gas valve exceeds 13” W.C., install positive dead-end lockup gas pressure regulator up stream of hand valve. c. To obtain approximate cubic feet per hour, divide input (BTU/HR) by 1000. 3. Remove gas supply knockout disc from jacket panel. 4. Follow good piping practices. 5. Pipe joint compound (pipe dope) must be resistant to corrosive action of liquefied petroleum gases. Apply sparingly only to male threads of pipe joints. 6. Install drip leg at inlet of gas connection to boiler. Where local utility requires, extend drip leg to floor. 7. Install ground joint union when required for servicing. 8. Support piping by hangers, not by boiler or its accessories. 9. Purge all air from supply piping. 10. Check all connections for leaks. Do not check for gas leaks with an open flame – BUBBLE TEST. Failure to use bubble test or test for leaks can cause severe personal injury, death or substantial property damage. a. Close manual main shutoff valve during any pressure testing at less than 14.0 inches water column. b. Disconnect boiler and gas controls from gas supply piping during any pressure test greater than 14.0 inches water column. 11. Set gas pressure switches as follows or to local inspector’s requirements: a. Low – 3.0” W.C. b. High – 14.0” W.C Table 2 Natural gas supply pipe sizing PIPE SIZE 1¼" 1½" 2" 2½" 3" 4" PIPE LENGTH, FEET (NATURAL GAS CAPACITIES, LISTED IN MBH) (Specific Gravity 0.60 @ Pressure Loss of 0.30" w.c.) 10’ 20’ 30’ 40’ 50’ 75’ 1,050 730 590 500 440 360 1,600 1,100 890 760 670 545 3,050 2,100 1,650 1,450 1,270 1,020 4,800 3,300 2,700 2,300 2,000 1,650 8,500 5,900 4,700 4,100 3,600 2,900 17,500 12,000 9,700 8,300 7,400 6,000 100’ 305 460 870 1,400 2,500 5,100 150’ 250 380 710 1,130 2,000 4,100 * Include measured length of gas supply piping and allowance in feet for number and size of fittings. III Wiring For your safety, turn off electrical power supply before making any electrical connections to avoid possible electrical shock hazard. 1. All wiring must be installed in accordance with the requirements of the National Electrical Code and any additional national, state or local code requirements having jurisdiction. All wiring must be N.E.C. Class 1. 2. The boiler must be electrically grounded in accordance with the National Electrical Code, ANSI/NFPA No. 70latest edition. Use 105 °C. thermoplastic wire, or equivalent, if any of the original wire must be replaced (except for pilot spark, sense and ground wires). 3. Supply wiring to the boiler must be No. 14 gauge or heavier. Install in conduit. 4. A separate electrical circuit with a fused disconnect switch (15 amp. recommended) should be used for the boiler. Part Number 550-141-807/0298 5 LGB (Series 2) — Control Supplement Flame Guardian WMBC-1A Electronic Pilot System – IRI Figure 5 — WMBC-1A panel wiring schematic 6 Part Number 550-141-807/0298 Part Number 550-141-807/0298 7 LGB (Series 2) — Control Supplement Figure 6 — WMBC-1A panel wiring diagram – factory wiring 8 Part Number 550-141-807/0298 Flame Guardian WMBC-1A Electronic Pilot System – IRI Figure 7 — WMBC-1A field wiring diagram Part Number 550-141-807/0298 9 LGB (Series 2) — Control Supplement IV Start-up Turn off electrical power supply and gas supply to boiler before making the following connections and adjustment. Failure to do so can cause severe personal injury, death or substantial property damage. 1. Disable high fire by disconnecting the blue wire in the two-stage gas valve. 2. Connect manometer to gas manifold (manometer must be capable of measuring 0” to 14” W.C.). 3. Turn on electrical power supply and gas supply to boiler. 4. Fire boiler, which will light off and remain on low fire. 5. While reading manometer, turn low fire adjustment screw clockwise (Figure 5) until pressure reading is 1.2” W.C. 6. Turn off boiler. Turn off electrical power supply and gas supply to boiler before the following steps. Failure to do so can cause severe personal injury, death or substantial property damage. 7. 8. 9. 10. Remove manometer from manifold and plug the tapping. Reconnect the blue wire in the two-stage gas valve junction box. Turn on electrical power supply and gas supply to boiler. Follow operating instructions label on boiler to set boiler in operation. Figure 8 Low fire adjustment Low Fire Adjustment 10 Part Number 550-141-807/0298 Flame Guardian WMBC-1A Electronic Pilot System – IRI V Sequence of operation 1. Operating control begins startup sequence: a. Limit control contacts are closed. b. Purge timer is energized. 2. Flame safeguard control pilot circuit energizes after 2.0 seconds. a. Pilot gas valve opens. b. Ignition transformer energizes. c. Yellow “pilot on” lamp lights. d. Pilot ignition spark begins. e. Pilot ignites. f. Pilot flame proves. 3. Flame safeguard control energizes main flame circuit: a. Blue “gas valve on” lamp lights. b. Gas control train energizes. c. Downstream gas valve opens to low-fire position. d. Main burners ignite, operate at low fire. 4. Ignition transformer de-energizes after 10-second trial for ignition. 5. Pilot de-energizes after 10-second trial for main flame. Yellow “pilot on” lamp goes out. 6. Main flame sensor proves main burner operation at low fire. 7. Flame safeguard control energizes downstream gas valve to high-fire (through firing rate control, when used): a. Main burners operate at high fire. b. Main burners operate at low fire when water temperature or pressure reaches setting of firing rate control, when used. 8. Boiler shuts down when operating control satisfied. 9. Flame safeguard control lockout circuit energized if pilot is not proved during start-up or if main flame is not proved during run sequence. a. Flame safeguard control locks out on safety. b. Red “alarm” lamp, alarm relay, and alarm bell energize. Silencing switch can shut off alarm bell. c. Alarm relay de-energizes purge timer. d. Press reset button on flame safeguard control to permit normal start-up after correcting lockout condition. e. Normal start-up resumes after purge timer automatically resets (5 minute enforced wait). Part Number 550-141-807/0298 11 LGB (Series 2) — Control Supplement VI Parts list – Table 3 Description Size Primary Control Vendor/Part Number Weil-McLain Part Number Honeywell RM7895C1012 510-350-431 Prepurge Timing Card 2.0 Seconds Honeywell ST7800A1005 510-350-432 Flame Amplifier Honeywell R7847A1033 510-350-434 Electric Bulb 120V Sylv. 120MB/CHI Min. CM8-967 * Fuse 6 Amp. Bussman MTH-6 Relay 120V DPDT Honeywell R4222D1013 510-311-012* * Control Timer SSAC EDRM427 510-350-430 Gas Cock, ¼ M x ¼ F Conbraco 53-300-01 * Pilot Regulator, ¼ NPT Maxitrol RV20A * Pilot Solenoid ¼" Honeywell V4046C Johnson Controls H91ABA Brass Union, 1/8 NPT x 1/4cc 511-044-040* * Low Gas Pressure Switch Honeywell C645A1030 High Gas Pressure Switch 511-624-550* Honeywell C645B1013 511-624-555* Conbraco 41-560-05 511-210-415* Pilot Burner Honeywell Q179C1009 511-330-181* Pilot Bracket Weil-McLain 460-005-624 Main Flame Sensor Honeywell 392956 511-724-274 Main Flame Sensor Bracket Weil-McLain 423-300-420 Main Burner with Bracket Weil-McLain 512-200-055 Ignition Transformer Honeywell Q624A1014 511-802-014* Gauge Cock Hand Valve ¼" 1" Essex 500 1 ¼" Essex 600 * 1 ½" Conbraco 50-603 * 2" Conbraco 50-703 * Valve Body (small - up to 2" Pipe Flanges) Pipe Flanges (for Valve Body) Honeywell V5097A 1" Honeywell 32000109-002 511-044-170 Honeywell 32000109-003 511-044-171 1 ½" Honeywell 32000109-004 511-044-172 2" Honeywell 32000109-005 511-044-173 Honeywell V4055A 510-744-317 ¾" Honeywell V4295S 511-046-340 1" Honeywell V4295S 511-046-342 Honeywell 32002513 511-044-176 Adapter for small valve body (for vent valve) Gas Valve with Regulator 510-744-315 1 ¼" Actuator For Valve Body (On/Off) Solenoid Vent Valve (Normally Open) * 1" Honeywell V4944N1011 511-048-503 1 ¼" Honeywell V4944N1029 511-048-502 1 ½" Honeywell V4944N1037 511-048-501 2" Honeywell V4944N1045 511-048-500 * Listed part can be purchased at local supply house Weil-McLain 500 Blaine Street Michigan City, IN 46360-2388 http://www.weil-mclain.com 12 Part Number 550-141-807/0298
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.6 Linearized : No XMP Toolkit : Adobe XMP Core 4.0-c316 44.253921, Sun Oct 01 2006 17:14:39 Create Date : 1998:11:12 07:07:06Z Creator Tool : Adobe PageMaker 6.52 Modify Date : 2009:03:23 13:48:03-05:00 Metadata Date : 2009:03:23 13:48:03-05:00 Format : application/pdf Description : 141807 Creator : Administrator Title : 141807 Keywords : Producer : Acrobat Distiller 3.01 for Windows Document ID : uuid:b80f105e-0deb-4869-b071-073633926133 Instance ID : uuid:26a711bc-03c0-49ab-bc5c-29747d6ac899 Page Count : 11 Subject : 141807 Author : AdministratorEXIF Metadata provided by EXIF.tools