Burnham Series 5B - Manual (Page 28)

28
FIG. 27
STEAM TRIM AND CONTROLS
32. TIGHTEN ALL SHEET METAL SCREWS.
a. Install the following plates or labels which are found
in the Instruction Envelope. See Fig. 25 or 26 for
location.
(1) Rating Label
(2) Operating Instruction Plate (#8 SMS required to
fasten)
(3) Combustible Clearance Flooring & Adequate
Combustion Plate
(4) Minimum Service Clearance Label
(5) Burnham Logo – Apply to Top Panel
(6) Boiler Ventilation/For Your Safety Label
b. Proceed to Paragraph 33 (Steam Boilers) or
Paragraph 34 (Water Boilers).
NOTE: IF WATER BOILER, PROCEED DIRECTLY
TO Paragraph 34.
33. INSTALL STEAM TRIM AND CONTROLS, See
Fig. 7 and 27.
a. Pressure Gauge is to be installed with ½” nipple and
½” x ¼” reducing coupling in ½” tapping provided
in upper corner of End Section using wrench applied
to square shank on back of gauge. DO NOT APPLY
FORCE ON GAUGE CASE.
b. Install 67BC-2 Low Water Cut-Off or 47-2
Combination Feeder and Low Water Cut-Off in
accordance with the Instructions packed with the
control. ½” pipe extensions are provided and must
be installed in the ½” tappings adjacent to the
Pressure Gauge before the control can be mounted.
Unions are furnished with the 67BC-2 Low Water
Cut-Off for ease of installation. 1” pipe tappings
have been provided in the End Sections for other
types of Low Water Cut-Offs and Low Water Cut-
Off & Feeder combinations. Fig. 28 illustrates
the required mounting elevations for a M&M 150
and a 67M float LWCO. Figure 15 illustrates a
typical steam piping arrangement for pumped return
systems.
c. Install Gauge Glass Fittings into ends of tees used
to connect the 67BC-2 or 47-2 Control. If other
control is furnished, install Gauge Glass Fitting
directly into ½” pipe extensions.
d. Install Pressure Limit Controls as follows:
(1) Boiler equipped with 67BC-2 Low Water Cut-
Off – Connect Pressure Limit furnished to ¼”
street ell and ¼” pigtail siphon. For installation
of second pressure limit (not furnished), bush
1½” pipe tapping in upper corner of End
Section. Connect Pressure Limit to this bushing
with ¼” pigtail siphon.
(2) Boiler equipped with Low Water Cut-Off other
than (1) above or with Low Water Cut-Off
Feeder Combination – Bush 1½” pipe tapping
in upper corner of End Section and connect
Pressure Limit furnished to this bushing with
¼” pigtail siphon. For installation of second
pressure limit bush any available tapping on
opposite end section that is above normal water
line. Connect Pressure Limit to this bushing
with ¼” pigtail siphon.
(3) Tighten limit controls by using wrench on hex
fitting at bottom of control.
(4) The L404 Pressuretrol must be accurately
leveled for proper operation. It is level when the
leveling indicator hangs freely with its pointer
directly over the index mark inside the back
of the case. Level the controller by carefully
bending the steam trap (siphon loop).
e. Install Pressure Safety Valve with fittings furnished,
into 1½” pipe tapping in upper corner of End
Section, see Fig. 12. DO NOT INSTALL A
SHUTOFF VALVE BETWEEN SAFETY VALVE
AND BOILER. If this boiler tapping is to be used
as Surface Blowoff, replace ell with tee and plug
open end of tee or valve off opening. Pressure
Safety Valve must be in leg of tee and in a vertical
position with handle up.
f. Install Boiler Drain Valve and 3” x ¾” Bushing into
one of the two return tappings. The drain valve
may also be installed in return piping, but it must
be installed in the leg of a tee so that it is directly
opposite and as close as possible to the return
tapping. The leg of the tee must be at least 1½” pipe
size.
SecTiON iii – iNSTALLATiON iNSTRUcTiONS (continued)