Weil-McLain LGB-6 User Manual
LGB
Gas–fired boiler
Control Supplement
LGBLGB
LGB
LGBLGB
-6 -6
-6
-6 -6
LGB LGB
toto
LGB
to
toto
LGB LGB
-20-20
-20
-20-20
Series 2 – Propane gas
CSD-1 Control System
Contents
I. New installation .......... 2
II. Existing installation .... 4
III. Water and steam trim
components .................. 4
IV. Gas piping ................... 5
V. Wiring ........................... 5
Sequence of operation ..... 8
Wiring procedure .............. 8
VI. Leak test procedure ... 10
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.
VII.
Operating instructions 11
VIII. 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 550-141-816/0304
LGB-6 to LGB-20 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,
below 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 Figure 6
(page 12).
4. Attach pilot switch box to interior jacket panel. See Figure 6 (page 12). 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. 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).
Table 1
Pilot burner and flame sensor
locations
Electronic
Pilot Burner*
Propane
Carton
Table 2
Electronic
Pilot Burner*
Boiler
Model
Number
LGB-6 A and B 1" -- LGB-14 I1"1"
LGB-7 A and B 1" -- LGB-15 J1" 1"
LGB-8 C and D 1" -- LGB-16 J1" 1"
LGB-9 C and D 1" -- LGB-17 J1" 1"
LGB-10 E, F and G 1 ¼" -- LGB-18 K1 ¼"1"
LGB-11 E, F and G 1 ¼" -- LGB-19 L1 ¼"1 ¼"
LGB-12 E, F and G 1 ¼" -- LGB-20 L1 ¼"1 ¼"
LGB-13 H1"1"
Boiler
Model
Number
LGB-6 2--9--6--LGB-14 2 161325 8 21
LGB-7 2--11--7--LGB-15 2 161327 8 22
LGB-8 2--13--8--LGB-16 2 181529 9 24
LGB-9 2--15--9--LGB-17 2 181531 9 25
LGB-10 2--16--9--LGB-18 2 201633 9 27
LGB-11 2--16--9--LGB-19 2 201634 9 27
LGB-12 2--16--9--LGB-20 2 221636 9 29
LGB-13 2 141123 7 19
* From left burner
Flame Sensor*
No. 1No. 2No. 1No. 2No. 1No. 2 No. 1No. 2No. 1No. 2No. 1No. 2
Gas control arrangement
Standing
Pilot Burner*
Propane
Carton
Boiler
Model
Number
Inlet Pipe Size
Left base Right base Left base Right base
Flame Sensor*
Boiler
Model
Number
Standing
Pilot Burner*
Inlet Pipe Size
Part Number 550-141-816/03042
I New installation – continued
Figure 1
Pilot burner assembly, typical
CSD-1 Control System – Propane gas
Figure 2
Main flame sensor assembly
Part Number 550-141-816/0304 3
LGB-6 to LGB-20 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 6 (page 12). 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 IV, paragraph
4 of this Supplement).
11. Re-install access panel(s).
12. See Figure 6, page 12 for propane piping.
13. Wire per wiring instructions and wiring diagrams, pages 5-9. 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.
III Water and steam trim components
1. Install water or steam trim components as required by CSD-1 latest edition. See the boiler
manual for tapping locations.
a. Water boilers require:
• a manual reset high temperature limit control in addition to the standard
automatic reset limit control.
• a manual reset low water cutoff.
b. Steam boilers require:
• a manual reset high pressure limit control in addition to the standard automatic
reset limit control.
• a manual reset low water cutoff in addition to the standard automatic reset low
water cutoff.
Part Number 550-141-816/03044
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