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Before beginning repairs read and understand Section 3.1 and follow the steps in Section 3.2
to decommission the Therm-O-Mix Station. The Station should be tested after all repairs are
completed.
1.
Label each hose connection going to the diaphragm housing for easy re-installation.
(See Appendix #3)
2.
Disconnect hoses from the diaphragm housing only.
3.
Use a 1-1/2” wrench or spud wrench to loosen diaphragm valve assembly. Once unthreaded
pull diaphragm valve out. Some resistance may be felt due to O-ring seal.
4.
Remove old body O-ring.
5.
Install new #221 Quad O-ring supplied with replacement kit.
6. Install new diaphragm valve assembly and tighten with 1-1/2” wrench.
7.
Position the diaphragm housing so that the adaptor fittings are pointing to the side of the
body with the braided hoses. *Note: To position the diaphragm housing, rotate clockwise
when looking down on the Therm-O-Mix® Station/WWM to prevent the valve internals from
loosening.
8.
Reconnect the braided hose lines by hand tightening the hose swivel fittings onto the adaptor
fittings. Use a 9/16” open end wrench to tighten the swivel nut 1 to 1-1/2 hex flats or 60
to 90 past hand tight. *Use second 1/2” wrench as a back-up wrench to prevent hose from
twisting.
*If braided hose connections containing orifice plates are opened, the orifice plate must be
replaced. Orifice plates have been included in the replacement kit in case they are needed.
(See Appendix #3)
Section 4.3: V1 Mixing Valve Replacement Instructions
