Exploded Parts

FIGURE 4
HOLD HERE TO REMOVE CARTRIDGE
5. To determine if the piston in cartridge is functioning properly, shake cartridge side to side. The piston
should make a clicking sound.
6. If no sound is heard when shaking, place cartridge in vinegar for at least 8 hours to remove scale and
debris. If still no sound is heard replace cartridge with RK7300-CART cartridge replacement kit.
Proper performance is dependent upon licensed, qualified personnel performing regular, periodic testing according to
ZURN specifications and prevailing governmental & industry standards and codes and upon following these installation
instructions. Failure to do so releases ZURN of any liability that it might otherwise have with respect to that device.
Such failure could also result in an improperly functioning device.
TROUBLE SHOOTING:
PROBLEM CAUSE SOLUTION
Valve will not flow water. Hot and cold water not turned on. Be sure both suplies are turned on
Service Stops not open. and service stops are open. Valve will
not operate unless both HOT and
COLD water inlets have pressure.
Water volume from valve is Pressure balancing piston housed in Remove and service cartridge as
inconsistent during operation. cartridge (10) assembly is blocked described in steps 1 through 6
from free movement by foreign of the MAINTENANCE and SERVICE
matter. section.
Valve delivers an insufficient quantity
of Hot or Cold water.
Temperatures fluctuate without moving
temperature handle.
Valve does not deliver Valve designed to deliver mixed
desired hot water temperature. hot and cold water in all handle
positions.
Temperature out of valve reduces Supply system is running out of hot Reduce maximum flow rate out of valve
gradually during use. water. or shower head. This will allow longer
period of use before reduction of hot
water supply.
Valve makes loud noise. Piston in cartridge is moving back
and forth because of a large pressure
differential between the HOT and
COLD water lines.
Alter the water system such that the
pressure differential at all shower
valves is no more than 5 psi.
Form # CF1024 Date: 6/8/10 SHT 3 OF 4
C.N. No. 126298 Rev. F
Increase system hot water
temperature.