MG & SG Series Boilers – Installation and Service Manual
21
4.4 CAUTION: WATER REPLENISHMENT
Avoid unnecessary replenishment of system water. It can allow oxygen to enter the system and cause
serious corrosion problems. As well, an excessive amount of minerals may be deposited in the heat
exchanger. Do not draw water from the heating system for cleaning, flushing, etc.
Any audible sounds in the boiler system may be indications of scaling or lack of sufficient water flow and
the system should be checked without delay. Scaling is due to improper maintenance. It is not the fault
of the boiler. Scale damage is not covered by warranty.
4.5 REFRACTORY HANDLING PROCEDURE
WARNING
The mineral block and fiberglass wool used in this product are RCFs (Refractory Ceramic
Fibers). RCFs pose a possible cancer hazard by inhalation and can cause respiratory, skin and
eye irritation.
After mineral block has been fired, it will produce increased levels of nuisance dust and poses
increased carcinogenic risk.
Follow the precautionary measures below before attempting service or access.
PRECAUTIONARY MEASURES:
• Avoid breathing fibers and contact with skin and eyes.
• Use a National Institute for Occupational Safety and Health (NIOSH) approved dust/mist
respirator.
• Wear long-sleeved, loose fitting clothing, gloves and eye protection.
• Wash work clothes separately from other clothing. Rinse washer thoroughly.
• Operations such as sawing, blowing, tearout and spraying may generate airborne fiber
concentration requiring additional protection.
• Use a vacuum with a HEPA filter for clean up.
• Dispose of all RCF scrap and dust in a closed airtight plastic bag.
FIRST AID MEASURES:
• Eye contact – Flush eyes with water to remove dust for at least 15 minutes. If irritation persists,
seek immediate medical attention.
• Skin contact – Wash affected area gently with soap and warm water after handling.
• Difficulty breathing – Move to an area of clean fresh air. Seek immediate medical attention if
difficulties persist.
• Ingestion – Do not induce vomiting. Drink plenty of water. Seek immediate medical attention.
Boiler Water Flow Data Section 5
Typical Water Flow Versus Pressure Drop Across Boiler
Model
20°F T.D. 30°F T.D.
Number
U.S. GPM P.D. FT. U.S. GPM P.D. FT.
MG50 4.0 1.1 3.0 1.0
MG75 6.0 2.2 4.0 1.1
MG100 8.0 3.5 6.0 2.2
MG125 10.0 5.2 7.0 2.8
MG150 12.0 8.0 8.0 3.5
SG135 11.4 2.8 7.6 1.2
SG180 15.1
2.8
10.1 1.2
SG225 18.9 2.8 12.6 1.2
SG270 22.7 2.8 15.1 1.2
To Next Page
Loading...
Need help?
General
