A.O. Smith Cirrex SUN-80, Instruction Manual

Page: 12 / 20

12
TEMPERATURE REGULATION
HOTTER WATER CAN SCALD: Solar water heaters are intended
to produce hot water. Water heated to a temperature which will
satisfy clothes washing, dish washing, and other sanitizing needs
can cause scalds resulting in serious personal injury and/or death.
Some people are more likely to be permanently injured by hot water
than others. These include the elderly, children, the infirmed, or
physically handicapped. If anyone using hot water in your home
fits into one of these groups or if there is a local code or state
law requiring a certain temperature water at the hot water tap,
then you must take special precautions. In addition to using the
lowest possible temperature setting that satisfies your hot water
needs, some type of tempering device, such as a mixing valve
should be used at the hot water taps used by these people or at
the solar water heater. Mixing valves are available at plumbing
supply or hardware stores. Follow manufacturers instructions for
installation of the valves. Before changing the factory setting of
the thermostat, read the Temperature Adjustment section.
KEEPING THE THERMOSTAT SETTING AT 120°F (49°C) WILL
REDUCE THE RISK OF SCALDS . Never allow small children to
use a hot water tap, or to draw their own bath water. Never leave
a child or handicapped person unattended in a bathtub or shower.
TEMPERATURE SETTINGS
NOTE: Residential solar water heaters will not supply sanitizing
hot water for dishwashers.
The thermostat is factory set at its lowest position which
approximates 120°F (49°C) (Hot) and is adjustable if a different
water temperature is desired. Read all warnings in this manual
and on the solar water heater before proceeding.
ADJUSTABLE
THERMOSTAT
WITH
HIGH LIMIT
HIGH LIMIT
CONTROL
RESET
BUTTON
OPERATION
Water
Temperature
°F(°C)
Time for 1st Degree
Burn
(Less Severe Burns)
Time for Perma -
nent Burns 2nd &
3rd Degree (Most
Severe Burns)
110 (43)
116 (47)
116 (47)
122 (50)
131 (55)
140 (60)
149 (65)
154 (68)
(normal shower temp.)
(pain threshold)
35 minutes
1 minute
5 seconds
2 seconds
1 second
Instantaneous
45 minutes
5 minutes
25 seconds
5 seconds
2 seconds
1 seconds
(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, 9/15/1978)
Figure 10.
TEMPERATURE ADJUSTMENT
To adjust the temperature setting:
1. Turn off the heater electrical supply. Do not attempt to adjust
thermostat with power on.
2. Remove the thermostat access panel(s) and fold up insulation
to expose the thermostats. Do not remove the plastic personnel
protectors covering the thermostats.
3. Using a flat tip screwdriver, rotate the adjustment knob to the
desired temperature setting.
4. Replace the insulation and access panels and turn on heater
electrical supply.
A non-adjustable high temperature limit control operates before
steam temperatures are reached. The high limit is in the same
area as the upper thermostat and must be reset manually when it
operates. BECAUSE THE HIGH LIMIT OPERATES ONLY WHEN
ABNORMALLY HIGH WATER TEMPERATURES ARE PRESENT,
IT IS IMPORTANT THAT A QUALIFIED SERVICE AGENT BE
CONTACTED TO DETERMINE THE REASON FOR OPERATION
BEFORE RESETTING.