Read all of the instructions thoroughly before attemptingthe installation or operation of this water heater. Do not discard this manual. You or future users of this water heater will need it for future reference. Service to the water heater should only be performedby a qualified service technician. Examples of qualified service technicians include: those trained in the plumbing and heating industry, local gas utility personnel, or an authorized service person. The manufacturer and seller of this

Replacing the Gas Valve Important: The rubber gasket that seals the gas valve tothe venturi manifold must be used (previous gaskets maybe reused, if in good condition). Make sure the gasket isproperly inserted into the recess on the gas valve prior toinstallation (see figure 25 for exact placement of the rubbergasket). 1. Remove the O-ring from the flange (removed from theold gas valve) and replace it with the one providedin the gas valve kit (model VK8115V, part number 6903775.) 2. Reattach the

The air inlet must be located with respect to the exhaust outlet as shown in figure 7A (bottom). Install a drain tee assembly and trap in the inlet vent as close to the water heater as possible. This is to drain any water that may be in the combustion air pipe and prevent it from entering the blower. Connect the trap drain line to a suitable drain or downstream of the condensate trap of the water heater. Note: See “Venting Additional Polaris® Units” on Page 10 for correct terminations if install

When tightened, the nut to heater base clearance should be 3/4” (+/- 1/8”). On 100 gallon models the condensate trap assembly should be glued to the exhaust pipe (see figure 3C). Note: The trap should be aligned so that the exhaust pipe is in a vertical position close to the surface of the water heater. Figure 2: Minimum Clearance Locations Figure 3A: 2” Condensation Trap Installation 100,000 - 150,000 BTU/Hr Models Clearances and Accessibility Notice: Minimum clearances from combustible materia

• Support all horizontal pipe runs every four feet and all vertical pipe runs every six feet or according to local codes. • Vents run through unconditioned spaces where below freezing temperatures are expected should be properly insulated to prevent freezing. For horizontal runs, wrap the vent pipe with nationally recognized/listed heat tape and/or approved insulation for freeze protection. Install per the manufacturer’s instructions. • An air intake filter is included with the unit and must be

Canadian installations must be performed inaccordance with CAN/CGA-B149. Note: If using a flexible gas connector, make sure its rating tag matches or exceeds the input of the water heater. Tables 2, 3A, and 3B on page 20 are provided as a sizing reference for commonly used gas pipe materials. Consultthe “National Fuel Gas Code” for the recommended gaspipe size of other materials. Follow the instructions below and reference figure 19 for gas piping installation. 1. Install a readily accessible ma

Important: Adjusting the thermostat past the 120°F setting on the temperature dial (see figure 22) will increase the risk of scald injury. Hot water can produce first degree burns within: 120°F (49°C) more than 5 minutes 130°F (54°C) at 20 seconds 140°F (60°C) at 3 seconds 150°F (66°C) at 1-1/2 seconds 160°F (71°C) at less than 1 second Emergency Shut Down Important: If overheating occurs or the gas supply fails to shut off, close the manual gas supply valve. Turn off the electrical supply to th

Replacing the relief valve will not correct the problem. If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or local plumbing inspector on how to control this situation. A properly sized expansion tank must be installed to prevent the water pressure from building to such a level in a Closed System. The manufacturer of this water he

• Line properly sloped to adequate drain or approved condensate pump. • Properly vented. • Protected from freezing (if required). Vent Pipe System • Vent pipe and fittings of approved material. • Acceptable size, length, and number of elbows on air inlet pipe. • Acceptable size, length, and number of elbows on exhaust outlet pipe. • Add the air inlet filter per the manufacturer’s instruction. • Installed in accordance with prevailing provisions of Local codes, or in the absence of such, National

*100 Gallon Model Shown. Gas Input Rate The gas input rate of this water heater is affected by several environmental factors such as: • The heating value of the gas • The air and gas densities (which vary widely due to barometric pressure and temperature changes) • Venting installations (pipe diameter, length and fittings) • Altitude When measuring the input rate these factors should beincorporated into the calculations. Also measure the gas consumption over a sufficiently long time to obtain an