Heat Transfer MODCON VWH 300 HL, Installation & Maintenance

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18
GAS-FIRED HOT WATER SUPPLY BOILER
Boiler Manual
PART 5: BOILER PIPING
(CONTINUED)
n
D A N G E R
BURN
HOT
Figure 5-3 Scald Warning Label Located on the Appliance
Water temperature over 125°F can
cause sever burns instantly or death
from scalds.
Children, disabled and elderly are at
highest risk of being scalded.
See instruction manual before setting
temperature at heating appliance.
Feel water before bathing or
showering.
If this appliance is used to produce
water that could scald if too hot,
such as domestic hot water use,
adjust the outlet control (limit) or
use temperature limiting valves to
obtain a maximum water
temperature of 125°F.
The following chart 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.
APPROXIMATE TIME / TEMPERATURE
RELATIONSHIPS IN SCALDS
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
F. SCALDING
This water heater can deliver scalding tempera-
ture water at any faucet in the system. Be care-
ful whenever using hot water to avoid scalding
injury. Certain appliances such as dishwashers
and automatic clothes washers may require
increased temperature water. By setting the
thermostat on this water heater to obatin the
increased temperature water required by these
appliances, you may create the potential for
scald injury. To protect against injury, you
should install a mixing valve in the water sys-
tem. This valve will reduce point of discharge
temperature by mixing cold and hot water in
branch supply lines. Such valves are available
from the local plumbing supplier.