Instruction manual

14
Thermostat Adjustment
There are two types of thermostats this electric water heater may come
equipped with from the factory. One type, surface mounted thermostats,
directly contacts the water heater tank surface (see Figure 4). The second
type, immersed type are immersed within the water heater tank and uses
contactor type relays. Before any work is done on the water heater,
disconnect all power to the water heater by opening the switch at the main
electrical circuit breaker or fuse box. Before adjusting or setting surface
mounted type thermostat(s), disconnect all power to the water heater.
To gain access to the surface mounted thermostat(s), remove the outer
access panel and fiberglass insulation. Using a screwdriver rotate the
thermostat dial on each thermostat clockwise to increase the water
temperature. After adjusting the surface mounted thermostats, replace the
fiberglass insulation making sure that the controls are well covered and that
the plastic terminal shield has not been displaced; replace the access panel.
Once the water heater has been filled with water, electrical power may be
restored to the water heater and the water heater is ready for operation. To
adjust or set the water temperature for water heaters using immersed type
thermostat(s), locate the temperature control dial on the right side of the
lower control box. To increase the water temperature, rotate the
temperature control dial clockwise (see Figure 5). The thermostat(s) or
temperature control dial has been factory preset to approximately 140°F
(60°C) or below.
APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS
120°F (49°C) More than 5 minutes
125°F (52°C) 1½ to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F (63°C) Less than 3 seconds
150°F (66°C) About 1½ seconds
155°F (68°C) About 1 second
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within
five (5) seconds at a temperature setting of 140°F (60°C). To protect
against hot water injury, install an ASSE approved mixing valve in the water
system. This valve will reduce point of discharge water temperatures by
mixing cold and hot water in branch water lines. A licensed plumbing
professional or local plumbing authority should be consulted.
Note: This water heater is equipped with an energy cut out device to
prevent overheating. Should overheating occur, turn off the electrical
supply to the water heater and contact a qualified service technician.