5
PLUMBING THE ULTRA UV2 UNIT WITH OPTIONAL BYPASS VALVE
The only reasons for installing an Ultra UV2 with bypass valve:
1. To allow for removal of the UV unit for winterization, servicing, repairs, or replacement, while
still allowing water to flow through the system.
2. If system pressure testing above 50 psi is required (max Ultra UV2 pressure is 50 psi/ 3.45 bar).
A
INSTALLING OPTIONAL FLOW SWITCH IF THE TOP OF THE UNIT IS BELOW WATER LEVEL
The pressure switch will always be on if the Ultra UV2 unit is plumbed below water level. To prevent
damage to the unit and its surroundings an optional flow switch must be installed. If the Ultra UV2 unit is
plumbed on a bypass, the optional 2 inch Flow Switch (part #004-402-0010-00 for 220v or part #004-
421-3824-00 for 120v), must be on the outlet side of the Ultra UV2 unit and plumbed after the two way
valve and before the tee into the return line. Please refer to the instructions supplied with the flow switch for
plumbing and wiring.
B
Turn off the power at the main source before disconnecting
or connecting the Ultra UV2.
DANGER
GLUING PIPING TO THE UV UNIT
Two Inlet/Outlet unions are supplied on our 1 & 2 lamp units and 4 unions are supplied on 3 lamp units.. Your
PVC supply piping should be glued into the union tail pieces using an appropriate primer and
ABS to PVC
cement
. Inlet piping should be supported and should not rest solely upon the unions, to avoid stressing or
breaking the unions. Allow the glue to set following the glue manufacturers recommendations before pressure
testing. A minimum of 24 hours is recommended. Maximum test pressure for the Ultra UV2 is 50 PSI / 3.45 BAR
as noted on the silver label on the unit. If local codes require the pressure test to be higher than the max operating
pressure on the silver label use the bypass (if the unit is plumbed with a bypass) to allow the Ultra UV2 to be only
left at or below the max operating pressure.
Do not plumb the Ultra UV2 with a bypass unless absolutely needed.
Failure to follow the instructions can result in damage to the Ultra UV2
that is not covered by the warranty.
NOTICE
Strongly recommend using supplied unions.
NOTICE
Filter
To Heater
or Pool
Pump
TYPICAL PLUMBING WITHOUT AND WITH BYPASS
The inlet(s) is at the bottom of the unit and the outlet(s) at the top. The maximum operating pressure for the
Ultra UV2 is 50 PSI / 3.45 BAR. The minimum operating pressure is 5 PSI / .345 BAR. Please refer to the
silver label on the unit for max. operating pressure.
Optional bypass
fully closed
A
Optional Flow
Switch
B
Optional bypass valves fully open
into inlet port and from the outlet port
A
This pipe does not exist if bypass
valve is not installed
