Polaris PC 130-34 2NV User Manual

22

Read and understand these directions thoroughly before 
attempting to operate the water heater (see Operating 
Instructions on Page 23).  Check the data plate on the 
front of the water heater for the correct gas. Do not use this 
water heater with any gas other than the one listed on the 
data plate.  If you have any questions or doubts, consult 
your gas supplier or gas utility company.

Propane gas is heavier than air and in the occurrence of 
a leak in the system, the gas will settle on the floor level.  
Basements, crawl spaces, skirted areas under mobile 
homes (even when ventilated), closets and areas below 
ground level will serve as pockets for the accumulation of 
gas.  Before lighting a propane gas water heater, smell all 
around the appliance at floor level.  If you smell gas, follow 
the instructions as given in the warning on the front page.

When your propane tank runs out of fuel, turn off the gas 
at all gas appliances including pilot lights.  After the tank 
is refilled, all appliances must be re-lit according to their 
manufacturer’s instructions.

This water heater does not have a pilot light.  It is equipped 
with an electronic ignition that automatically lights the 
burner.  There are three lights to indicate the various stages 
of operation;  Green = Electrical power is on, Yellow = 
Thermostat is calling for heat, which signals the beginning 
of the ignition sequence (see figure 21), and Red = Ignition 
control is signaling the gas valve to open.

When the thermostat calls for heat, the blower will run for 
6 seconds to purge the system of any accumulated gas or 
air.  The hot surface igniter will heat up for 35 seconds. The 
blower will turn on and the gas valve open, forcing the air 
and gas mixture across the hot surface igniter, causing the 
burner to light.  The hot surface igniter will turn off and act 
as an electronic flame sensor to determine if burner ignition 
has been accomplished.  If it detects any loss of flame, it 
will shut off the gas supply to the burner.
The ignition control will try to light the burner three times. 
If the ignition control does not detect a flame after three 
tries, it will temporarily lock out, but then auto restart and go 
through three additional tries for ignition after 60 minutes. 
It will repeat until ignition occurs or the system locks out 
requiring service. Refer to Troubleshooting Guide on Page 26.

The sensor is a 10K ohm [at 77°F (25°C)] thermistor.  Read 
resistance through the black wires that run to the sensor. 
Remove wires from circuit board before checking.  An open 
or short circuit indicates sensor failure.  Check reading 
against the values listed in Table 3.  The resistance should 
correspond with the temperature in the tank: 

     I         Resistance

60°F

16°C

15,300 ohms

80°F

27°C

9,300 ohms

100°F

38°C

5,800 ohms

120°F

49°C

3,800 ohms

140°F

60°C

2,500 ohms

160°F

71°C

1,700 ohms

185°F

85°C

1,100 ohms