AERCO AM Series Boiler User Manual - Manual (Page 106)

AM Series Boilers and Water Heaters
CHAPTER 5 – OPERATION
Page 106 of 156 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0100_0B
PRI - 07/14/14
Ph.: 800-526-0288
GF-146
5.2.3 Adjusting the Storage Tank Temperature (Water Heaters)
The storage tank temperature is adjusted by pressing keys and . When the keys
are pressed, the display, item “N” in Figure 5-3, shows the domestic hot water setpoint being
selected. The range within which the domestic hot water can be set is from 104°F (40°C) to
140°F (60°C).
The right temperature to keep storage and save energy, is the lowest possible temperature
compatible with the amount of water you need. Start with a temperature of 120°F and check if
this is sufficient. If not, gradually increase the temperature setpoint, checking each time if it is ok
or not.
There is a hot water scald potential if the thermostat is set too high.
5.2.4 Freeze Protection – Water Heaters
For the freeze protection function to work, the heater must remain connected to the electrical
and gas supplies with DHW service switched to OFF
The freeze protection function is designed to protect the water heater only, not the water
system.
Because the water heater freeze protection function depends upon the electrical and gas
supply, it is mandatory to install a safety device that alarms the user in case the unit room will
reach a temperature near 35°F (2°C).
Once the heater has reached a temperature of 50°F (10°C), the pump will automatically come
on. If the temperature falls below 41°F (5°C), the burner will light to prevent the unit from
freezing.
If the unit will not be used for long time it should be drained per Section 6.1.4.
5.2.5 Display Energy Saving Mode
The display turns off each time no key is touched for at least 30 minutes, with the exception of
when it displays errors or settings.