LGBGas–fired boiler
Control Supplement
LGB-6 to LGB-23 Series 2 – Propane gas
Universal Control System
U.S. and Canada
These terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.
Contents |
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I. |
New installation ........... |
2 |
II. |
Existing installation ..... |
4 |
III. Gas piping ..................... |
5 |
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IV. Wiring ............................ |
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Sequence of operation ..... |
8 |
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Wiring procedure .............. |
8 |
V. Operating instructions . 9 |
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VI. Parts list – U.S. ........... |
10 |
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VII.Parts list – Canadian ... |
11 |
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 550-141-797/0798
LGB-6 to LGB-23 Series 2 – Control Supplement
I New installation
1.Remove all burners from base box assembly. Remove 3.95 mm natural gas main burner orifices in manifold. Install 2.40 mm propane gas main burner orifices. Use pipe dope sparingly only on male ends. Use pipe dope compatible with propane gases. Do not overtighten orifices.
2.Install pilot burners and flame sensor(s). See Figures 1 and 2 (page 3). Follow Table 1 for electronic pilot burner (UCS), standing pilot burner (Q327) and flame sensor locations on manifold.
3.Install gas controls and ignition control panel as shown in Table 2, below and either Figure 5 (page 10) or Figure 6 (page 11).
4.Attach pilot switch box to interior jacket panel. See Figure 5 (page 10) or Figure 6 (page 11). Connect thermocouple from standing pilot to switch box. Cut 60” pilot tubing into 2 pieces to make connections from pilot valve to pilot switch box and from pilot switch box to standing pilot.
5.LGB-21 through LGB-23 require High Gas Pressure Switch Control Carton furnished with boilers. Attach pressure switch to interior jacket panel. See Figure 5 (page 10) or Figure 6 (page 11).
6.Attach:
a.550-223-710 label at boiler operating instruction label. Place so that this label reads first.
b.550-223-796 label at rating label.
c.Wiring diagram on door (one on each base).
d.Canada only - mount rating plate on interior jacket panel.
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Table 1 |
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Pilot burner and flame sensor |
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locations |
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%RLOHU |
)ODPH 6HQVRU |
(OHFWURQLF |
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6WDQGLQJ |
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%RLOHU |
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)ODPH 6HQVRU |
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(OHFWURQLF |
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6WDQGLQJ |
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0RGHO |
3LORW %XUQHU |
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3LORW %XUQHU |
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0RGHO |
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3LORW %XUQHU |
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3LORW %XUQHU |
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1XPEHU |
1R |
1R |
1R |
1R |
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1R |
1R |
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1XPEHU |
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1R |
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1R |
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1R |
1R |
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1R |
1R |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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/*% |
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)URP OHIW EXUQHU |
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%RLOHU |
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%RLOHU |
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Table 2 |
3URSDQH |
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,QOHW 3LSH 6L]H |
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3URSDQH |
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,QOHW 3LSH 6L]H |
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0RGHO |
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0RGHO |
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Gas control arrangement |
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1XPEHU |
&DUWRQ |
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/HIW EDVH |
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5LJKW EDVH |
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1XPEHU |
&DUWRQ |
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/HIW EDVH |
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5LJKW EDVH |
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/*% |
$DQG % |
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/*% |
- |
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/*% |
$DQG % |
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/*% |
- |
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/*% |
& DQG ' |
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/*% |
- |
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/*% |
& DQG ' |
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/*% |
. |
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ó |
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/*% |
( ) DQG * |
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/*% |
/ |
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/*% |
( ) DQG * |
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/*% |
( ) DQG * |
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/*% |
+ |
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/*% |
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ó |
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/*% |
, |
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/*% |
/ |
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ó |
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2 |
Part Number 550-141-797/0798 |
Universal Control System – Propane gas
I New installation – continued
Figure 1
Pilot burner assembly, typical
LGB-A84-B
Figure 2
Main flame sensor assembly
LGB-A85
Igniter
Sensor
Locating Slot
Burner Support Bar
Pilot Line Tubing
Sensor Lead
Igniter Lead
Flame
Sensor
Locating Slot
Burner Support Bar
Sensor Lead
UCS Pilot
Burner
Compression
Union
10-32 x 5/16“ Machine Screws(2)
Ground Leadwire: Connect to Pilot Proving Module 24 V (GND) terminal
Pilot Mounting
Bracket
10-32 x 1/4“ Machine Screws (2)
Main Burner
(with Pilot
Mounting
Bracket)
6-32 x 5/16“ Type ”F”
Self Tapping Screws(2)
10-32 x 5/16“ Machine Screws(2)
Ground Leadwire: Connect to Main Flame Proving Module 24 V (GND) terminal
Flame Sensor
Mounting Bracket
Main Burner
(with Pilot
Mounting
Bracket)
Part Number 550-141-797/0798 |
3 |
LGB-6 to LGB-23 Series 2 – Control Supplement
II Existing installation Conversion from natural gas to propane gas
This conversion is to be installed by a Weil-McLain distributor or other qualified agency in accordance with the manufacturer’s instructions and all codes and requirements of the authority having jurisdiction. Failure to follow instructions could result in serious injury or property damage. The qualified agency performing this work assumes responsibility for this conversion.
For your safety, turn off electrical power supply before making any electrical connections to avoid possible electrical shock hazard.
1.These instructions are for use with Propane Control Cartons as listed in Gas Control Arrangement, Table 2 (page 2).
2.Remove jacket door(s) and access panel(s).
3.Disconnect wiring and tubing from existing pilot burner and main flame sensor.
4.Remove all burners. Remove 3.95 mm natural gas main burner orifices in manifold. Install 2.40 mm propane gas main burner orifices. Use pipe dope sparingly only on male ends. Use pipe dope compatible with propane gases. Do not overtighten orifices.
5.Remove and discard existing electronic pilot burner from pilot burner tube. Replace with electronic pilot burner in carton.
6.Attach Q327 standing pilot to burner tube in kit. Connect pilot tubing and thermocouple to pilot.
7.Re-install burners. See Table 1 (page 2) for location of pilot burners and flame sensor(s).
8.Attach pilot switch box to jacket. See Figure 5 (page 10) or Figure 6 (page 11). Connect thermocouple to pilot switch box. Cut 60” pilot tubing into 2 pieces to make connections from tee in pilot line to pilot switch box and from pilot switch box to standing pilot.
9.Remove natural gas valve train.
10.Install propane gas valve train and fittings from carton (See page 5, section III, paragraph 4 of this Supplement).
11.Re-install access panel(s).
12.See Figure 5 (page 10) or Figure 6 (page 11), for propane piping.
13.Wire per wiring diagram, Figure 3 (pages 6 and 7). Add splices as needed.
14.Attach:
a.550-223-710 label at boiler operating instruction label. Place so that this label reads first.
b.550-223-796 label at rating label.
c.Wiring diagram over diagram on door (one on each base).
15.To place in operation, follow instructions on constant burner pilot light-up label and boiler operating label.
16.Replace jacket doors.
4 |
Part Number 550-141-797/0798 |