Slant/Fin Oil-fired Boiler dimensions Installing Controls Accessories on Boiler Units, Piping

6 INTREPID

INSTALLING CONTROLS AND

ACCESSORIES ON BOILER UNITS

Note: Jacket must be installed on boiler units prior to installation of trim.

I.STEAM BOILER TRIM, see page 2 for tapping locations, and figure 4 for illustration of steam boiler.

A.Steam pressure gauge and pressure cut-out, install in tapping no. 4, figure 4.

B.Gauge glass set — use tapping no. 12.

C.Pop safety valve — use tapping no. 3, piped full size to boiler; or pipe full size into a valveless steam header.

D.Combustion safety control — mounted on burner.

II.WATER BOILER TRIM, see page 2 for tapping locations, and fig- ures 1 and 2 for illustration of water boiler.

A.Pressure- temperature - altitude gauge — use tapping no. 6.

B.High temperature limit — use tapping no. 7.

C.Operating control (if used) — use tapping no. 7.

D.Water relief valve — use tapping no. 3, piped full size to boiler.

E.Automatic air vent or compression tank tappings — if used, install in tapping no. 2.

F.Combustion safety control — mounted on burner.

PIPING

IMPORTANT: Boilers are to be used with closed system. Any application that uses steam or water from system, causes the intro- duction of a frequent supply of fresh water into the boiler. This will cause damage to the boiler. Use of heat exchangers will prevent this damage.

PIPING FOR STEAM BOILERS

Provide Header and Hartford Loop as suggested. See figures 4 and 5. Local codes apply.

CLEANING PIPING SYSTEM

A.To clean piping system, open all valves at the heating elements. After getting up a good head of steam, shut the boiler down and allow the condensate to return to the boiler. The condensate will carry the oil film with it. Again blow-off the boiler. On extremely fouled systems, it may require several visits over a few days to clean

the system.

B.When steam only (no water) is released through the hand valve, the boiler will not surge or flood.

PIPING FOR WATER UNITS

NOTE: On knocked-down boiler only, jacket may be installed after sup- ply and return piping connection, but must be installed prior to adding trim.

I.CIRCULATING SYSTEM

A.FORCED CIRCULATION hot water heating system: Use the top tapping as supply tapping, and use the front or rear bottom tappings for the return.

B.A FLOW CONTROL VALVE (See figure 6) will prevent gravity

circulation and usually is required when tankless heater is installed.

II.AIR CONTROL SYSTEMS

A.DIAPHRAGM-TYPE COMPRESSION TANKS are used to con- trol system pressure in an AIR ELIMINATING SYSTEM:

an automatic air vent is used to REMOVE air from the system water.See figure 6. If system pressure needs further control, add an additional tank or install a larger capacity tank. The automatic air vent should be installed in the top of the boiler, as in figure 6.

B.CONVENTIONAL COMPRESSION TANKS (non-diaphragm type) are used to control system pressure in an AIR COLLECTING SYSTEM. Within the system, after initial start-up and venting, air is collected in the tank and acts in contact with the water to con- trol pressure. Air is not vented from this system.

If system pressure needs further control, add another tank in parallel with the original tank or install a large capacity tank. Locate the tank at the inlet end of the pump near the boiler.

(See figure 7)