Page 14SERIES 28A BOILER INSTALLATION AND OPERATION INSTRUCTIONS

GENERAL PIPING REQUIREMENTS Figure 14 - Back Section Tapping Locations

CAUTION: Never use automotive antifreeze in the boiler or heating system. If antifreeze is necessary it must be formulated specifically for hydronic heating systems, such as ethylene or propylene glycol. Failure to comply with this caution will void the warranty!

All heating system piping must be installed by a qualified technician in accordance with the latest revision of the ANSI/ASME Boiler and Pressure Vessel Code, Section IV. Also ANSI/ASME CSD-1, Standard for Controls and Safety Devices for Automatically Fired Boilers where required. All applicable local codes and ordinances must also be followed. A minimum clearance of 1" must be maintained between heating system pipes and all combustible construction.

CAUTION: Improper piping of this boiler can result in poor performance and premature failure of the boiler voiding the warranty! Improper piping can also cause flooding and extensive property damage!

Ensure that the boiler is level from front to back and from side to side. Use metal shims to level the boiler. NEVER use wood, plastic or other combustible materials as shims.

If a boiler is installed above any radiation elements it must be fitted with a low water cutoff device.

NOTE: Install the observation port assembly before making any return piping connections as access may be blocked by piping.

Figure 13 - Front Section Tapping Locations

Table 5 - Water & Steam Tappings

Tapping

Size

Water

Steam

1

1/8"

Chamber Pressure

Chamber Pressure

2

3/4"

 

Probe LWCO

3

3/4"

Temp./Pressure Gage

 

4

3/4"

Operating Control - Top

Water Glass

5

3/4"

Manuel Reset

Manuel Reset High

High Limit

Limit & Steam Gage

 

 

6

1"

Air Removal

Water Column - Top

7

6"

Water Supply

Skim Tapping

8

3/4"

Tankless Heater

 

Operating Control

 

 

 

 

9

1 1/2"

 

Inspection Tapping - Top

10

1"

Water Column - Bottom

Water Column - Bottom

11

4"

Boiler Drain

Boiler Drain/Blowoff

12

4"

Return

Return

13

 

Relief Valve

Safety Valve

Relief & Safety Valve Piping

Install the pressure relief or safety valve in the 3" NPT opening in the top of the back section, Figure 14.

WARNING: The discharge of the pressure relief or safety valve must be piped close to the floor to prevent scalding in the event of a discharge, see Figure 15. The discharge piping must be sized the same as the pressure relief or safety valve outlet. Never install any type of valve between the boiler and the pressure relief or safety valve! Failure to comply with this warning can result in an explosion causing extensive property damage, severe personal injury or death!