Specifications

The auxiliary high temperature limit thermostat will also "trip" when the water

temperature surpasses the temperature set on the thermostat. However, the

auxiliary high temperature limit thermostat will reset automatically when the water

temperature drops below the set temperature.

Replacement

If any of the thermostats are found to be malfunctioning and need to be replaced,

follow the procedures detailed below.

1. Follow Steps 1 through 5 of the shutdown procedure (page 19) to take the

unit off-line before attempting to replace the thermostat(s).

t The combination of electricity and water can pose a very dangerous

situation. Assure that all power has been shut off / disconnected and

locked out in an approved manner, before attempting any installation or

maintenance procedures.

2. After assuring that the power has been turned off, the pressure bled from

the tank, the water drained, and the unit has cooled, unlock and open the

electric control cabinet door.

3. Locate the thermostat to be replaced and tag the wires attached to the

thermostat to assure proper reconnection after the new thermostat has been

installed.

4. Disconnect the wires from the thermostat terminals.

5. Trace the capillary tube leading from the thermostat to the tank. It may be

necessary to move a small portion of the fiberglass insulation to gain access

to the location on the tank where the temperature probe is mounted. The

capillary tube connects the thermostat body to the temperature probe

mounted within the tank.

6. The temperature probe is mounted to the tank via a compression fitting.

The body of the compression fitting can be difficult to remove from the

tank. To facilitate removal, cut the capillary tube with a pair of diagonals

or wire cutters close enough to the compression fitting body to allow a six

(6) point socket to be used to remove it from the tank.

Note: Do not remove the compression fitting cap nut. This could allow the

temperature probe to become free and possibly fall into the tank.

7. Using the correct size six (6) point socket, remove the body of the

compression fitting from the tank. The remainder of the capillary tube, still