Polaris PC 130-34 2NV User Manual

24

During the normal operation of the water heater, sounds or 

noises may be heard. These noises are common and may 

result from the following:
1.  Normal expansion and contraction of metal parts    

during periods of heat-up and cool-down.

2.  Sediment buildup in the tank bottom will create varying 

amounts of noise and may cause premature tank fail-
ure. Drain and flush the tank as directed under “Drain-
ing and Flushing”.

This water heater is equipped with a pressure switch that 
protects the unit by shutting it down in the event that:
• 

A blockage occurs in the combustion air inlet, the    
flue gas exhaust outlet, or both the inlet and outlet.

• 

The condensate line freezes and the condensate    
“backs up” and fills the exhaust outlet.

• 

The blower fails to operate, or operates improperly.

• 

The unit begins to operate at an abnormally low     
input level.

A high temperature limit switch, or ECO, is used to shut 

down the water heater if the water temperature exceeds 

203°F (95°C).  The ECO will automatically reset when 

the temperature cools sufficiently.  If the ECO shuts down 

the heater repetitively, contact a qualified professional for 

service.

It is recommended that the tank be drained and flushed 

every 6 months to remove sediment which may buildup 

during operation. The water heater should be drained if 

being shut down during freezing temperatures.
To drain the tank, perform the following steps:
1. 

Turn off the gas supply at the Manual Gas Shut-off   

 

Valve. Turn off the electrical supply to the water  

 

 heater.
2. 

Open a nearby hot water faucet and run until the    

 

water is no longer hot.

3.    Close the cold water inlet valve.
4. 

Open the left-hand access panel at the bottom of the 

heater (see figure 23).  Connect a hose to the drain 

valve and terminate it to an adequate drain or external 

to the building.

5.    Open the water heater drain valve and allow all of the 

water to drain from the tank. 

6.  Flush tank to remove sediment. 
7.  Close the drain valve, replace access door, refill      

the tank, and restart the heater as directed under     
“Operating Your Water Heater”. 

IMPORTANT: Condensation may occur when refilling the 

tank and should not be confused with a tank leak.

Manually operate the 

temperature and pressure 

relief valve at least once 

a year to make sure it is 

working properly.  To prevent 

water damage, the valve 

must be properly connected 

to a discharge line which 

terminates at an  adequate 

drain. Standing clear of the 

outlet (discharged water may 

be hot), slowly lift and release 

the lever handle on the  

temperature and pressure relief valve to allow the valve to 

operate freely and return to its closed position (see figure 

24). If the valve  fails to completely reset and continues to 

release water, immediately shut off the manual gas valve 

and the cold water inlet valve, and call a qualified service 

technician.