Installation Manual

H-Series Demand Duo™ 2 Installation and Operation Manual 34
Complete the following checklist when installation is complete. You should be able to answer YES to each question. If you
answer NO, installation is not complete. Refer to the applicable section in this manual and the tankless water heater
installation and manual for additional information.
INSTALLATION DETAILS YES NO
Have you verified the unit, vent and air intakes meet the clearance requirements?
 
Are parameter settings configured appropriately for the altitude?  
Are the tankless water heater front panels installed?
 
Does the installation conform with local codes or, in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1?
 
VENTING YES NO
Are the correct venting products for the installed system being utilized?
 
Have you followed the venting manufacturer’s installation instructions and the installation instructions in this
document?
 
Have you verified the water heater is not subject to corrosive compounds in the air?
 
Have you verified the vent system does not exceed the maximum length for the number of elbows used?
 
Did you explain to the customer the importance of not blocking the vent termination or air intake?
 
SYSTEM PIPING YES NO
Have you verified the water supply does not contain chemicals or exceed total hardness that will damage the
heat exchanger?
 
Did you ensure the hot and cold water lines are not crossed to the unit and are leak free?
 
Did you place a manual gas control valve in the gas line to the water heater?
 
Did you ensure that a pressure relief valve is installed with a rating at least the maximum BTU/hr of the
appliance? Refer to the rating plate on the side of the tankless water heater for BTU input.
 
Did you clean the inlet water filter by closing the cold and hot water inlet isolation (shut-off) valves? (Put a
bucket under the filter at the bottom of the water heater to catch any water that is contained inside the unit.
Unscrew the water filter. Rinse the filter to remove any debris. Install the filter and open the isolation valves.)
 
Have you verified that no toxic chemicals were introduced to the potable water?  
Did you drain the water from the heat exchanger if the water heater is not needed for immediate use?  
GAS SUPPLY
YES NO
Have you performed a gas line and connection leak test?  
Is the inlet gas pressure within limits?
 
Did you verify the water heater is rated for the gas type supplied?
 
Have you verified the system is functioning correctly by connecting your manometer to the gas pressure test
port on the water heater? Operate all gas appliances in the home or facility at high fire. The inlet gas pressure
at the water heater must not drop below that listed on the rating plate.
 
POWER SUPPLY
YES NO
Have you confirmed that the electricity is supplied from a 120 VAC, 60 Hz power source; is in a properly
grounded circuit; and turned on?
 
Have you verified the temperature controller is functioning properly?
 
OTHER
YES NO
Have you explained to the customer the operation of the water heater, safety guidelines, maintenance, and
warranty?
 
Did you leave this manual and the Water Heater Installation and Operation Manual(s) taped to the water
heater? Or you may give both manuals directly to the consumer.
 