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OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —
Close clearance installation
To provide close clearances as described on pages 34 and 35:
Obtain the Close Clearance Kit, Weil-McLain Part No. 386-500-050. Install the kit as described below. Failure to use
kit or install as described can result in a fire hazard, causing severe personal injury, death or substantial property
damage.
Close clearance installation
Substitute these instructions for corresponding material in manual.
All other procedures and practices must remain the same.
Recommended service and minimum clearances shown on page 8
should be used where possible. Where closer clearances are required:
•
Top of boiler — If less than 24" available, provide removable
surface to allow for cleaning boiler flue ways.
•
Right or left side — Minimum 2 inches.
•
Front — Minimum 2 inches from burner.
•
Type "L" double-wall flue pipe to combustible surface — as listed
in Table 6, page 35 and Figure 28 through Figure 30, page 35.
Jacket cap must be in place on boiler to avoid requiring
an 9" minimum clearance from back or top of boiler
to combustible material. Flue pipe clearances must
take precedence over jacket clearances.
1. Install boiler using clearances described at left.
2. Install barometric control 18-20 inches from boiler in breeching.
3. Attach manual reset temperature switch near upper surface of
enclosed area. See Figure 26.
4. Wire switch in series with thermostat. See Figure 27.
5. Provide two combustion/ventilation openings when installing in
confined space. Size opening 140 sq. in. (1000 Btu) per 1 GPH
input. Locate openings near top and bottom of enclosed space.
Figure 26
Manual reset temperature switch location
1 to 5
inches
Manual reset
temperature
switch
Bracket
Area above boiler
34
SERVICE TECHNICIAN ONLY — read and follow completely.
Combustible surface
#6 X ½" Phillips
Sheet metal
screw
#10 X ½" Phillips
sheet metal screw
Boiler Manual
Burner adjustments
Final burner adjustments must be made using
combustion test equipment to assure proper
operation. Do not fire boiler without water or
sections will overheat.
1. Refer to burner manual for start-up.
2. Allow boiler to heat to design condition.
3. Burner should be adjusted to 13% CO
smoke level of zero and over-fire of -0.01" to -0.02". Re-
adjust burner combustion to account for environmental
conditions. Actual CO
adjusted for clean and safe combustion operation. Seasonal
variations as well as sufficient combustion air supply can
affect proper combustion and boiler performance. The
burner should only be adjusted by a service professional
with appropriate instrumentation.
Figure 27
Manual reset temperature switch wiring
Manual reset
temperature switch
Thermostat
or less with a
2
value will vary and should be
2
44156
Part number 550-142-332/0421
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