Precision® Instruction Manual
SERVICE (Contd.)
NOTE: Assembly and disassembly of these water baths for servicing will re-
quire a special tool for removal of TORX® type screws. The tool necessary is
a TORX® T-25 key and maybe purchased at your local auto parts or hardware
store.
General Information: To service the water bath, turn it on its side or top, remove bottom plate and insulation. To prevent
scratching of the enameled surface, place protective material (cardboard, cloth, or newspaper) under unit.
Leaks: Should a leak develop, drain bath and remove shelf. Turn bath upside down and remove bottom plate and insu-
lation. Leakage is only possible through the thermostat capillary fitting. Therefore, check locknut to see if it is tight, or if
0-ring needs to be replaced.
Thermostat Replacement: Replace thermostat if bath water does not heat and pilot light remains "off." Follow the steps
below to remove the thermostat.
CAUTION: Care must be exercised when handling the thermostat capil-
lary, since a sharp bend will crimp off the flow of the hydraulic operating
medium. To avoid twisting the capillary or damaging O-ring, hold the fit-
ting under the bath stationary, and firmly tighten locknut inside bath
chamber. Do not over-tighten, as O-ring could be squeezed out of posi-
tion, causing bath to leak. Under-tightening will also cause the bath to
leak.
1.
Disconnect power to bath and put switch in "Off" position.
2.
Remove shelf and drain bath.
3.
Remove thermostat control knob by loosening two set screws on knob.
4.
Place bath on its side and remove bottom plate and insulation to gain access to thermostat fitting.
5.
Remove two screws fastening thermostat to control panel.
6.
Remove wires from thermostat terminals.
7.
Hold the fitting under the bath stationary, unscrew locknut inside bath chamber, and remove from capillary.
8.
Feed thermostat capillary out through hole in bottom of chamber.
9.
Replace O-ring on bottom side of chamber with new Viton O-ring.
10.
Complete installation by reversing above procedure. Be certain all wiring is away from heater. Insulation must
be replaced between heater and bottom plate to prevent possible wire shorting.
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