Raypak WH 0195A User Manual download pdf (Page 5)

GENERAL SAFETY

To meet commercial hot water requirements, the tank-

stat is adjustable up to 190°F. However, water

temperatures over 125°F can cause severe burns

instantly or death from scalds. This is the preferred

starting point for setting the control for supplying gen-

eral purpose hot water.

Safety and energy conservation are factors to be con-

sidered when setting the water temperature on the

tankstat. The most energy efficient operation will result

when the temperature setting is the lowest that satis-

fies the needs consistent with the application.

Maximum water temperatures occur just after burner

has shut off. To find hot water temperature being deliv-

ered, turn on a hot water faucet and place a

thermometer in the hot water stream and read the

thermometer.

Water temperature over 125°F can

cause instant severe burns or death

from scalds.

Children, disabled, and elderly are

at highest risk of being scalded.

See instruction manual before set-

ting temperature at water heater.

Feel water before bathing or show-

ering.

Temperature limiting valves are

available, see manual.

Table A details the relationship of water temperature

and time with regard to scald injury and may be used

as a guide in determining the safest water temperature

for your applications.

Time/Temperature

Relationships in Scalds

The temperature of the water in the storage tank can

be regulated by setting the temperature dial on front of

the tankstat. To comply with safety regulations, the

tankstat was set at its lowest setting before shipment

from the factory.

Fig. 1 illustrates the tankstat. To adjust the water tem-

perature, insert a small straight screwdriver into slotted

screw in hole in front of tankstat and turn wheel to

desired setting. Thermostat is adjustable up to 190°F.

Temperature Time to Produce Serious Burn

120°F More than 5 minutes

125°F 1-1/2 to 2 minutes

130°F About 30 seconds

135°F About 10 seconds

140°F Less than 5 seconds

145°F Less than 3 seconds

150°F About 1-1/2 seconds

155°F About 1 second

Table courtesy of Shriners Burn Institute.

Table A: Time to Produce Serious Burn

Fig. 1: Tankstat Adjustment

1 2 3 4 5 6 7 8 9 10 ... 27 28

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Raypak WH 0195A User Manual Page 5

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