Z 15+ - Timer Type Circulation Pump
Version 21.07
3
Please read over the operating manual prior to
installation and keep it for reference.
Step 2: Turn off the power to the water heater and isolate the cold-water supply to water heater;
open the hot water tap in the house and wait until the residual water is drained out.
Step 3: Install the water pump at the hot water outlet of water heater; connect the outlet of water
pump to the hot water pipeline. Confirm the pumping direction through the arrow on the side of
pump case, and the installed water pump shall be kept away from exhaust/gas lines. Make sure to
insert the supplied gasket into the union end connection of the pump to ensure a leakproof seal.
Step 4: Reopen the cold-water supply to the water heater and close the furthest faucet when the
pipeline is filled with water to exhaust the air completely; power on the water heater and the water
pump.
Step 5 (applies to models with timer only): Set the timing function of water pump to make it operate
in the peak period of hot water use. (e.g., 15-30min before taking a shower)
Step 6: Close the cold and hot water angle valves below the tap, and observe the signs of cold water
inlet/outlet and hot water inlet/outlet of the temperature-sensing bypass valve; use braided hoses
to connect the cold water angle valve and the “COLD IN” of valve, connect the hot water angle valve
and the “HOT IN” of the valve, connect the “COLD OUT” of the valve and the cold water end of the
tap, and connect the “HOT OUT” of the valve and the hot water end of the tap; open the hot water
angle valve and the cold water tap to check whether the valve operates normally (if the water runs
out from the cold water tap normally and becomes warm, and the water flow becomes small slowly
until it stops, it indicates that the valve operates normally); close the tap and open the cold water
angle valve.
Note: 1. To obtain the best circulating results, the valve shall be installed below the tap the farthest
away from the water heater; if there are branch hot water pipes in your house, more than one valve
may be needed. 2. There may be some warm water in the cold water pipeline connected with the
valve, and warm water will dissipate soon when the cold water tap is opened.
Outline dimensions of the product*
*Pump pictured with timer
