NTI FTVN - Water Temperature Adjustment and Scalding; High Elevation Installations

9
Part 1 - General Safety Information
CAUTION
WARNING
I. High Elevation Installations
Natural gas at high elevation might contain less heating value than
the typical 1,000 BTU/cu ft and therefore can cause an improper
air / gas mixture leading to improper combustion. For natural gas
installations above 3,000 ft, call your gas provider to determine the
heating value of the supplied natural gas.
H. Water Temperature Adjustment and Scalding
This boiler can deliver
scalding water. Be careful
whenever using hot water
to avoid scalding injury.
Certain appliances such as
dishwashers and automatic
clothes washers may
require increased water
temperatures. By setting the
thermostat on this boiler to
obtain the increased water
temperature required by
these appliances you may
create the potential for scald
injury.
To protect against injury,
install a mixing valve in the
water system. This valve
will reduce point of use
discharge temperatures by
mixing cold and hot water
in branch supply lines.
Such valves are available
from your local plumbing
supplier.
Table 3 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.
On FTVN085 / FTVN110 / FTVN150 / FTVN199 Models ONLY
If the boiler is to be used only in Heating Mode (not connected to
an indirect water heater), the electrical connection of the 3-way
valve motor MUST BE DISCONNECTED while the boiler is operating
in central heating mode. This will lock the valve motor in central
heating mode and ensure freeze protection operates properly.
Failure to disconnect the valve may disable boiler freeze protection
and result in property damage.
Approximate Time / Temperature Relationships in Scalds
120
o
F More than 5 minutes
125
o
F 1 1/2 to 2 minutes
130
o
F About 30 seconds
135
o
F About 10 seconds
140
o
F Less than 5 seconds
145
o
F Less than 3 seconds
150
o
F About 1 1/2 seconds
155
o
F About 1 second
Table 3 - Time and Temperature Relationship in Scalds
An ASSE 1017 or ASSE 1070 temperature limiting or mixing valve
is required in all combi boiler installations. Failure to install a
temperature limiting or mixing valve will result in property damage,
severe personal injury, or death due to scalds.
DANGER