FIGURE 2.2: RECOMMENDED FIREPROOF BASE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6" OVERHANG OF BLOCKS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AND SHEETMETAL ALL

 

 

 

 

 

 

 

 

 

AROUND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4" HOLLOW CLAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TILE (TWO COURSES)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPENINGS THRU BLOCKS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IN TOP COURSE TO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BE AT 90° ANGLE

 

 

 

 

 

22 GAUGE

 

 

 

 

 

 

 

 

 

 

 

 

TO OPENINGS THRU

 

 

 

 

 

SHEETMETAL

 

 

 

 

 

 

 

 

 

 

 

BOTTOM COURSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLOOR

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 header 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.

FIGURE 2.3: TYPICAL STEAM BOILER PIPING

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).

WARNING: Never install any type of valve between the boiler and the relief valve or an explosion causing extensive property damage, severe personal injury or death may occur!

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 piping 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 scalding person- nel.

STEAM

SUPPLY

GATE VALVE

 

SUPPLY

 

TAPPING

12" MIN.

3" NPT

MUST BE CLOSE

 

NIPPLE

 

HARTFORD

 

LOOP

WATER LINE

GATE

RETURN

TAPPING

VALVE

2" NPT

 

RETURN

C/L OF HARTFORD

LOOP TO BE 2"

BELOW WATER

LINE

23 1/4"

COLD

WATER

 

DRAIN

COCKS

5