HydroTherm VSB2-605, Инструкция по установке, эксплуатации и техническому обслуживанию и список запасных частей

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STEP 2: INSTALLING STEAM PIPING
Typical piping connections are shown in Figure 2.3. All
external piping must be supported by hangers, not by
the boiler or its accessories.
Supply outlet must run full size from the boiler to a head-
er at least 24" above top of boiler. Condensate return
piping should be connected to boiler through a "Hartford
Loop." Install gate valves in supply and return.
Proper steam piping practices must be followed at all
times. Maintain proper clearances between piping and
combustible material.
The supply and return lines should be equipped with
drain cocks to drain sediment and sludge from lowest
points of boiler.
STEP 3: INSTALLING
HYDRONIC COMPONENTS
A low-water cutoff must be installed to protect the unit
from dry fire.
Screw extension nipple into 3/4" tapping on top of the
absorption unit and install relief valve into top of nipple
with the spindle in the vertical position (i.e., with the
valve discharge in the horizontal).
Most localities require the discharge piping to terminate
within 6" of the floor. Check local code requirements if in
doubt. Discharge piping must be of same size or larger
than the relief valve outlet and should be run as short
and straight as possible. Elbows in the discharge piping
should be placed as close to the valve as possible. If
valve discharge is to be drained away, the discharge pip-
ing must not be hard-piped to the drain piping (i.e., an
open funnel or similar arrangement must be used).
CAUTION: Piping must be installed from the relief
valve discharge so there will be no danger of scald-
ing personnel.
FIGURE 2.2: RECOMMENDED FIREPROOF BASE
4" HOLLOW CLAY
TILE (TWO COURSES)
OPENINGS THRU BLOCKS
IN TOP COURSE TO
BE AT 90° ANGLE
TO OPENINGS THRU
BOTTOM COURSE
22 GAUGE
SHEETMETAL
FLOOR
6"
6" OVERHANG OF BLOCKS
AND SHEETMETAL ALL
AROUND
FIGURE 2.3: TYPICAL STEAM BOILER PIPING
C/L OF HARTFORD
LOOP TO BE 2"
BELOW WATER
LINE
12" MIN.
SUPPLY
TAPPING
3" NPT
GATE
VALVE
DRAIN
COCKS
GATE VALVE
RETURN
TAPPING
2" NPT
HARTFORD
LOOP
MUST BE CLOSE
NIPPLE
STEAM
SUPPLY
RETURN
WATER LINE
23 1/4"
COLD WATER FILL
WARNING: No Valve of any type may be installed
between the boiler and the relief valve to prevent
accidental explosion from over-pressure.