AquaStar 170 VP manual Pilot orifice may not be correct for your type of gas, Air in the Gas Line

4.Pilot orifice may not be correct for your type of gas.

Pilot orifice is stamped: #15 for LP and #27 for NG.

5.Air in the Gas Line

Note: Normally this is a problem only at the time of installation if the pipes have been worked on,a propane tank has been allowed to empty, or the heater has been shut down for a long time. Bleed all the air trapped in the gas line. Be- cause of the very small pilot orifice (especially on LP gas models), bleeding out all the air could take several minutes. Hold the pilot push but- ton pushed in until all the air has escaped, and the gas has arrived.

PILOT LIGHTS BUT FLAME GOES OUT WHEN BUTTON IS RELEASED

1.Pilot push button was not pushed in far enough or was not held in long enough Push pilot button in, turn it to the left, then push it in all the way. Hold it pushed in for at least 20 seconds to give time for the pilot flame to prop- erly heat the tip of the thermocouple before re- leasing it. See Lighting Instructions, Page 11.

2.Pilot flame improperly aimed or is too weak so it is not properly heating the tip of the thermocouple

The pilot flame has two flames, one aimed at the thermocouple and the other aimed at an angle towards the burners (see pilot flame dia- gram, Fig. 4, page 13). It is extremely impor- tant that the flame directed on the thermocouple head be aimed right at it, and that the pilot flame be a sharp blue flame. If the pilot assembly has been taken apart for cleaning, the pilot flame may no longer be properly aimed.

3.Poor circuit connections at the ECOs (Energy Cut-Off switches)

Oxidation or looseness of the ECO screw con- nections can result in millivolt current loss through the thermocouple safety circuit. Clean terminals with very fine sand paper or an eraser and re-tighten terminal screws. (See letter V in Fig 2, page 6).

4.Faulty Energy Cut Off (ECO)- Part 34209 If cleaning and retightening the screws on the thermocouple wires attached to the ECOs did not fix the problem, test each ECO by discon- necting awire from one side of it and reconnecting it to the other side so both wires are making good contact. Relight the pilot. If the pilot flame now remains on, replace the ECO. If the flame still goes out when the button is released, the ECO is not defective. Go to the next step (#5 below).

5.Poor thermocouple connection at the elec- tromagnet (part #20883)

Note: The electromagnet is located directly be- hind the pilot push button assembly at the rear of the gas control. Tighten the thermocouple connection to the electromagnet. The connec- tion is a large brass collar and a nut at the back of the gas valve directly opposite the pilot push button assembly. The thermocouple end is a

12mm (15/32") nut which screws into a 16 mm (5/8") hex fitting on a brass collar. This large brass collar must be snug before you tighten the smaller nut in order to avoid twisting and damaging the thin copper thermocouple tube. Tighten the thermocouple nut snug but not too tight.

6.Faulty thermocouple or electromagnet (parts #23989 and 20883).

Unless these parts are at least 8-10 years old, it is very unlikely that they are faulty. Before testing, reconfirm that #2 and #3 are absolutely correct, and all connections are clean and tight.

To test the thermocouple, disconnect the thermocouple from the electromagnet and discon- nect the thermocouple wires from the two ECOs.

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