Wells WM-TR Service Manual

705

INSTALLATION INSTRUCTION

KIT # 84015 WATER-MAX™ INDUCTIVE HEATER REPLACEMENT

Instructions for replacing the INDUCTIVE HEATER in Wells Mfg.
Water-Max™ model WM-TR.

Disconnect Water-Max from electric power and water supply.

SUGGESTION: Gather all fasteners in a container for convenient
reassembly.

A. ACCESS AND DISASSEMBLY

Remove CONTROL COVER and DE-LIME FITTING from top
of WRAP.

Remove FRONT ASSEMBLY:
Disconnect tubing from discharge nozzle.
Disconnect two Molex connectors.
Disconnect error light wiring from control board.

Remove TANK SHELF by removing the two screws directly
below shelf on the lower face of WRAP.

Remove eight screws holding wrap to frame. Slide wrap up and
off frame. Use care to avoid scuffing or pinching any wiring or
tubing.

Unscrew contactor/SCR mounting
bracket from frame. Position
bracket out of the way.

Disconnect inlet water line from
WATER VALVE by unscrewing
water valve cap.
Be sure to capture the WASHER
for later use.
Slide water valve from its mounting
clip.

Remove two screws holding cooling

fan to top of heater. Position water
valve and cooling fan out of the
way.

Disconnect inlet and outlet tubing
from heater at the flare fittings.

CAUTION:

ELECTRIC SHOCK

Disconnect appliance from electric
power before opening any access
panel.

HAZARD

CAUTION:

BURN HAZARD

Allow appliance to cool completely
before servicing.

Water-Max™ Cabinet

p/n 306205 Rev. (-) ECN-12651 I 705 040302 cps

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A. ACCESS AND DISASSEMBLY (continued)

Examine heater wiring. Cut all tie wraps from heater wiring.

Disconnect RED and YELLOW heater wires from terminal block.
Disconnect GREEN/YELLOW heater ground wire from ground lug.
Disconnect BLACK heater wire at wire nut.

Note orientation of red and yellow wires of two brown-sheathed
temperature sensor leads at controller. Disconnect sensor leads.

Disconnect two white and one black wire for heater internal overload
protectors at their respective connectors. Finally, remove one black
wire from contactor coil terminal.

Unbolt inductive heater from frame. Lift heater out of frame and
discard.

B. REASSEMBLY

Install new heater in frame. Be sure water inlet and outlet tubes are
toward front, and that the insulating washers are in place, and that
bolts are tight.

Route wiring to its respective locations. Connect wiring.
Heater RED wire connects to 208V terminal of terminal block
Heater YELLOW wire connects to 240V terminal.
Heater BLACK wire connects to black (10 ga.) #9 with wire nut.
Be sure GREEN/YELLOW wire is securely fastened to stud of
grounding lug.
Front temperature sensor connects to WATER INPUT terminal of
controller; RED lead to (-), YELLOW to (+).
Rear temperature sensor connects to TRANSFORMER terminal
of controller; RED lead to (-), YELLOW to (+).
Neatly chase all wiring and secure with tie-wraps.

Connect inlet and outlet tubing to heater flare fittings. Use a back-up
wrench to insure that heater tubing does not bend, twist or kink.

Bolt cooling fan assembly to top of heater.
Return inlet water valve to valve mounting clip. Verify that washer is
in place, then reassemble water supply to valve.
Reinstall contactor/SCR bracket.

Reassemble wrap. Take care to prevent scuffing or pinching wires or
tubing.

Reinstall tank shelf and de-lime fitting.

Set FRONT ASSEMBLY approximately in place.
Reconnect error indicator wiring to controller.
Reattach water outlet tubing to discharge nozzle.
Reconnect two molex connectors, then reattach front assembly to
wrap.

Reinstall control cover.

Reconnect Water-Max™ to water supply and electric power. Test for
proper operation.

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