AQ4 Installation instructions
2.5 Vent piping
1.Install 5" to 4" reducer pipe on top of the water heater and then connect a 4" 90º elbow to begin the horizontal run. Use 4” vent pipe to connect from this elbow to the power vent motor inlet, avoiding elbows when possible. The maximum vent length from the water heater to the point of termination is 25 feet with one elbow. (Fig. 5) If using more than one 90° elbow, subtract 5 feet off the maximum vent length for each additional elbow used. A maximum of three elbows is allowed. The minimum straight vent length is 2 ft.
2.Support the vent pipe in accordance with vent pipe manufacturer’s instructions. Vent pipe is not supplied in the power vent kit, with the exception of the 5" to 4" reducer in the AQ4 kit. Observe the clearances associated with the class of vent pipe used. 4" single wall galvanized, 4" stainless steel or 4"
2.6 Linear safety spillage switch
The linear safety spillage switch provides a means for safety shut down of the water heater in the event of flue blockage or power vent failure. If hot flue gases spill from the draft hood diverter, the draft spillage sensing switch will open the pilot safety circuit and shut off all gas to the water heater. The switch is normally closed and opens at temperatures greater than 185º F. It has a manual reset button.
Mounting the linear safety spillage switch
1.Attach the spillage switch to the top left of the heater’s draft diverter using the existing hole and the included mounting screw. (Fig. 6)
2.Lay copper capillary sensing tube across top of the draft diverter. Allow excess tube to hang down right side of heater. Do not cut or crimp capillary tube.
3.Route the two wires from the spillage switch down the left side of heater to the ECO keeping the cables out of contact with hot surfaces. (Fig. 6)
Connecting linear safety spillage switch to pilot safety circuit
The ECO/temperature limiter is mounted on the lower left outlet water pipe. (Fig. 7)
1.Remove one wire lead connected to ECO terminal (it does not matter which one is disconnected).
2.Attach ¼" quick connect terminal end of linear spill switch cable to now exposed terminal of the ECO.
3.Connect the male spade connector to the removed lead wire from step 1. See the wiring diagram in Fig. 13 to confirm proper set up.
Fig. 5 Venting setup
Fig. 6 Linear safety spillage switch mounting
ECO terminals
Fig. 7 ECO location
AQ4 Manual |
