AquaStar 170 VP manual Main Burners do not Ignite When HOT Water is Turned on

Attach a multimeter lead on the thermocouple copper tubing below the head, and attach the other meter lead on the ends of both the wires. Light the pilot and take a reading on the meter. If it reads less than 24 mv, replace the thermo- couple. If the reading is 24 mv or over, the thermocouple is good.

To test the electromagnet, reconnect the ther- mocouple and take another reading. The read- ing should drop to about 14 mv. If it does not, replace the electromagnet.

MAIN BURNERS DO NOT IGNITE WHEN

HOT WATER IS TURNED ON

1. Pilot is not on.

Light the pilot. See lighting instructions.

2.Pilot lighting push button not turned to proper position

When the pilot flame is on , be sure that the push button is released fully and is turned to the right on the burner position (3 flames sym- bol).

3.Cold incoming water connection made to wrong side of heater

Make sure cold water inlet connection is on the right side of heater when you are facing the heater.

4.Water flow rate at hot water tap is too low. Note: The AquaStar model 170 requires 1.1 gallons per minute flow to activate the burners. This is a flow which can fill a quart jar in 12 seconds or a gallon in 48 seconds.

5.Cold water inlet screen on heater is dirty. Remove this screen (M in Figure 2, page 6) and clean it.

6.Crossover in household plumbing

The AquaStar burner activates when there is sufficient water pressure drop in the AquaStar water valve assembly when a hot water faucet is opened. If there is a plumbing crossover, the necessary pressure drop in the AquaStar will

not occur. A plumbing crossover can be caused by a bad washer at a single lever faucet, incorrect piping or an automatic mixing valve in the line which permits hot and cold water to mix in the plumbing. The crossover will create a back pressure in the system preventing the pressure drop in the AquaStar - i.e. cold water is entering the water valve from both sides and the burners will not come on. To confirm there is no crossover in the plumbing, shut off the cold water supply to the AquaStar. Open your hot water taps. There should not be any water flowing. If there is water flowing, there is a crossover in the plumbing. This is a plumbing problem, not an AquaStar problem. Please contact your plumber.

7.Water valve parts may be dirty or compo- nents damaged.

Note: If #4 is OK, skip this.

Water valve and component parts must be to- tally free of dirt. In hard water areas, mineral deposits can eventually (3-5 years) corrode water valve parts to a point where they will need replacing. Note: there is a small bleed hole under the gas valve at the seam where it is con- nected to the water valve assembly. Any sign of corrosion at this location is a sign that the water valve assembly components need to be replaced immediately. Water valve for Model

170(38411) consists of parts #33071 and

38475. Contact service person to service the water valve.

PILOT LIGHTS BUT GOES OUT DURING OR IMMEDIATELY AFTER HOT WATER USE

1.Thermostat calibration is incorrect or thermostat is defective

The thermostat is not maintaining the proper burner output for the water flow and the heater is overheating. When this happens, the ECO safety trips and shuts off the main gas supply. After the heat exchanger cools, the ECO re- sets and the pilot can be relighted. In order to check the calibration, see page 20. If the ther- mostat cannot be calibrated properly, it is de- fective and must be replaced (see page 21).

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