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5) Install the left side panel in the same manner as the right side.
6) Attach the front corners of the diverter panel to the side jacket panels using #10 sheet metal screws.
7) Install the horizontal (angle) jacket clips in the front edge of the side jacket panels. Slide this clip through the
rectangular slot that is about halfway up the front edge of the side jacket panels and secure with the 8-32 self
tapping screws provided.
8) Slip the Vertical Jacket Clip through the rectangular slot that is near the bottom of the front edge of the side jacket
panels. Secure with the 8-32 sheet metal screws provided.
9) Install the top jacket panel. Use #10 sheet metal screws to attach it to the rear jacket panel and the top-front corners
of the side panels.
10) Install the upper-front jacket panel. Insert the flange on the top of this panel under the top panel. Run two #10 sheet
metal screws into the horizontal jacket clips through the holes in the bottom of this panel.
11) Attach the door knobs to the Lower-Front Panel using 8-32 x 1/2 machine screws.
12) The labels have been applied at the factory. Verify the location of the labels according to the list below:
a) Clearance Label - Located on the top jacket panel.
b) Lighting Instructions - Located on the lower left corner of the right side panel next to the gas manifold
c) Lowest Permissible Water Level Plate - Located next to the bottom water gauge tapping.
d) Blow Down Card - Located just above the "Lowest Permissible" Water Level Plate
e) Wiring Diagram - Located on the inside of the removable door
f) "CROWN" Nameplate - Located on the top center of the outside of the removable door
g) Rating Plate - Located on the upper left of the right side panel
D. Gas Valve Installation
1) The gas valve assembly has been pre-piped with one half of a piping union and is to be connected to the other half of
the union located on the gas manifold.
2) Connect the pilot tubing from the pilot burner to the gas valve pilot tapping.
3) Connect the thermocouple lead to the gas valve (standing pilot boilers only).
E. Control and Trim Installation
(Refer to Figure A3 for Tapping Locations)
1) Install the pressure limit control into tapping “H” with the siphon. A ¾” x ¼” bushing has been factory installed. Do
not twist or otherwise bend the control upon installation.
2) Install the pressure gauge into tapping “B”. A ¾” x ¼” bushing has been factory installed. Tighten with wrench
applied to the square shank on the back of the gauge. Do not apply pressure on the gauge case since this may ruin the
calibration of the gauge.
3) Steam boiler with McDonnell Miller #67 float Low Water Cutoff
a) Install the low water cutoff per the instructions packed with the control.
b) Screw brass nipples with one side of the brass union into tappings “C”.
c) Attach the gauge glass / low water cutoff assembly to the other side of the brass union.
d) If not already present on the jacket, attach the blow-down card to the left side jacket panel, just above the “Lowest
Permissible Water Level” plate.
e) Provide blow down discharge piping.
4) Steam Boiler with Probe Low Water Cutoff
a) Install low water cutoff probe into tapping “B”. Handle probe with care.
b) Attach low water cutoff control to probe per the instructions packed with the control.
c) Install the gauge glass fittings and ½” extensions into tappings “C”. The lower fitting has a small drain cock.
d) Install gauge glass and protective rods in fittings.
5) Install safety valve (spindle must be in vertical position) into tapping “H” on the boiler left side (See Figure 1 in the
installation manual) using the ¾” NPT nipples and elbow supplied. Pipe the discharge of the safety relief valve to a
location where water or steam will not create a hazard or cause property damage if the valve opens. The end of the
discharge pipe must terminate in an unthreaded pipe. The safety valve discharge piping must be in an area where it is
not likely to become plugged by debris or subjected to freezing.
6) Install drain valve into tapping “J” on the boiler left side using 2 x ¾ bushing provided. (See Figure 1 in the installation
manual).
7) See Section VIII System Piping in the installation manual for instructions on completing the piping of this boiler
including the safety valve and drain valve provided by the factory.
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