State Water Heaters GPG/GPV-540A Instruction Manual page 36

210
For 10 Grain Hardness Lime
Deposited vs. Temperature
180
and Water Use
Data From Purdue Bulletin 74
150
120
90
60
30
300 900 1500
Gallons of Hot Water Used Per Day
FIGURE 29.
DELIMING SOLVENTS
TANK CLEANOUT PROCEDURE
DELIMING USING FLO-JUG METHOD
180°F
170°F
160°F
150°F
140°F
120°F
2100 2700 3300 3900
Prepare the Water Heater
Chemical Hazard
NOTE: THE USE OF RUBBER OR NEOPRENE GLOVES IS
RECOMMENDED, ESPECIALLY IF YOU HAVE ANY OPEN
SORES OR CUTS TO AVOID UNNECESSARY IRRITATION OR
DISCOMFORT.
36
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.