Install Instructions

TR/HL and SMART Series
Thermostat Replacement Instructions
3
TR Series
1. Disconnect power to the water heater.
2. Remove the old thermostat knob. DO NOT
DISCARD THE KNOB.
3. Slide the plastic flanges up on the domestic pip-
ing allowing clearance to lift the top jacket
panel.
4. Remove the (9) screws securing the top jacket
panel to the side and back jacket panels.
5. Remove the (6) screws from the control panel,
and lift top panel from the unit.
6. Remove the two capillary lines and sensing
bulbs from the drywell located in the top front
of the tank. The white plastic coated capillary
is the thermometer sensing bulb. The bare or
black plastic coated capillary is the thermostat
sensing bulb.
7. To remove the thermostat from the control
panel and bezel ring, remove the (2) mounting
screws.
8. Discard the thermostat in a proper manner,
unless the distributor has requested its return.
9. Reconnect the (2 of 3) wires to the new ther-
mostat as shown in Figure 1A or 1B. DO NOT
connect the yellow/green ground wire.
10. Mount the new thermostat to the lid and bezel
ring with the 2 mounting screws. Position the
indication mark on the bezel ring 90º counter-
clockwise from the wire connections. Figure 2
11. Re-insert the (2) capillary lines and sensing
bulbs into the drywell until the thermostat bulb
reaches the bottom. The temperature bulb
should be inserted a minimum of 10 inches and
a maximum of 12 inches into the drywell.
• If the thermostat bulb does not slide into
the drywell, remove the burrs inside the
drywell with a 3/8” drill to a depth of 1
1/2”.
Make sure the thermostat capillary line is
not kinked or damaged. A defective capil-
lary line can cause the thermostat to fail,
resulting in a situation that can result in
severe personal injury or death.
12. Remount the control panel on the unit and
secure it with the (6) screws.
13. Reattach the top jacket panel with the (9)
mounting screws and slide the plastic flanges
flush to the lid.
14. Reconnect power to the water heater.
15. Install the old knob and adjust the thermostat to
desired temperature according the instructions
at the end of this document.
WARNING