Refer to Fig. 26 for jacket assembly.
a)
Assemble four frame rails (items 52, 53, 54) around
casting base, with overhang toward front. Fasten
with four M6 nuts.
b)
Assemble side panels. Press upper (items 57, 58)
and lower (items 81, 82) side panels together by
inserting push studs into retainers. Press the front
side panel (item 65) to the upper and lower panel
assembly and fasten with Phillips screws (two per
side).
c)
Place the assembled side panels on the side
frame. To ease assembly, tape the side panels to
the draft hood to hold them vertical.
d)
Attach rear panel (item 63) to side panels using
eight 7 x
1
⁄
2
˝ self-tapping Phillips screws. Angled
fold must be at top and pointing inward. Remove
tape applied in step c).
e)
Position lower mid panel (item 67) so that the lower
fold sits on the pins on the burner manifold. Fasten
to side panels using two 7 x
1
⁄
2
˝ Phillips screws.
f)
Position upper mid panel (item 62) and fasten to
lower mid panel and side panels using four
7 x
1
⁄
2
˝ Phillips screws.
g)
Position the top cover (item 69) and press push
studs into retaining clips.
h)
Press lower front panel (item 66) onto side panels.
i)
Place blank cover over the unused opening on the
lower side panel on the side opposite the pilot
burner. Fasten using four 7 x
1
⁄
2
˝ Phillips screws.
j)
Mount the Vitotronic control housing on the middle
of the top front panel using 4 x
1
⁄
2
˝ Phillips sheet
metal screws. The Vitotronic control can be
mounted on the housing using the three black
riveted screws shipped with the Vitotronic controls.
2.4.4 Gas controls (see Figs. 9, 11, 22, 23, 25)
Refer to Fig. 9, Gas controls, and Wiring diagram.
a)
Connect gas train to the burner manifold using the
union provided. Align gas train with manifold and
tighten union.
b)
Connect pilot gas tubing to the fitting downstream
of the pilot gas valve. The tubing is connected
using a compression fitting. Install pilot burner on
same side as manifold gas train connection (see
Figs. 23, 25).
c)
Connect the gas supply pipe upstream of the “tee”
fitting, using the union provided. Install a drip leg
and shut-off valve in the gas supply pipe outside
the boiler.
d)
Connect low voltage wiring as shown in wiring
diagram. Ensure that ground connection between
pilot burner and ignition module is made.
e)
Install upper front cover panel on four push pins.
Insert the temperature sensors from the Vitotronic
control into the 5-point well located in the upper
right hand corner of the mid panel. (The insulation
in this opening may require cutting.) Be careful not
to kink the capillary tubes! Refer to Fig. 10.
f)
Connect the #41 plug from the Vitotronic control to
the #41 plug from the ignition system or to #41 plug
of either a vent damper or a power venter (see
wiring diagrams).
2.4.5 Gas connections
Connect gas to main burner via the opening for the gas
pipe in the left or right side panel (see Figs. 11, 23).
Install a capped drip leg and a manual gas shut-off
valve outside the boiler. Size gas supply to boiler
according to local requirements. Under no
circumstances shall the gas supply pipe be of smaller
diameter than the boiler’s gas pipe.
Minimum natural gas supply pressure: 7.0˝ w.c. and 11˝
w.c. for LP (measure at gas connection to boiler).
Maximum gas supply pressure for all gases: 14.0˝ w.c.
All factory-assembled gas connections have been leak
tested. A leak test must be repeated during the initial
operation of the boiler by the installer. Use an approved
liquid spray solution to check for leaks at all fittings and
unions. Never use an open flame to check for leaks.
Check gas input by clocking gas meter after all water and
electrical connections have been made, and boiler has
been filled with water. When checking input using a gas
meter, ensure that all other gas-fired equipment is shut off.
Safe lighting and other performance criteria were met
with the gas manifold and control assembly provided on
the boiler when the boiler underwent tests specified in
ANSI Z21.13 boiler standard.
7
Fig. 7
Mounting draft hood
Draft hood assembly
M8 x 30
bolts
Boiler casting
Detail
