Installation Manual

9
WHL-019 REV. 12.17.14
A. BEFORE LOCATING THE HEATER
Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk. Ensure that the heater installation
location adheres to the information included in this manual. Failure to do so could result in property damage, serious personal injury, or
death.
Failure of heater or components due to incorrect operating conditions IS NOT covered by product warranty.
1. Installation Area (Mechanical Room) Operating Conditions
 Ensure ambient temperatures are higher than 32
o
F/0
o
C and lower than 104
o
F/40
o
C.
 Prevent the air from becoming contaminated by the products, places, and conditions listed in this manual, Part 3, Section F.
 Avoid continuously high levels of humidity
 Never close existing ventilation openings
 Ensure a minimum 1” clearance around hot water and exhaust vent pipes
The service life of the heater’s exposed metallic surfaces, such as the casing, as well as internal surfaces, such as the heat exchanger,
are directly influenced by proximity to damp and salty marine environments. In such areas, higher concentration levels of chlorides from
sea spray coupled with relative humidity can lead to degradation of the heat exchanger and other heater components. In these
environments, heaters must not be installed using direct vent systems which draw outdoor air for combustion. Such heaters must be
installed using room air for combustion. Indoor air will have a much lower relative humidity and, hence, potential corrosion will be
minimized.
This heater is certified for indoor installations only. Do not install the heater outdoors. Failure to install this heater indoors could result in
substantial property damage, severe personal injury, or death.
2. Check for nearby connections to:
 System water piping
 Venting connections
 Gas supply piping
 Electrical power
 Condensate drain
3. Check area around heater. Remove any combustible materials, gasoline, and other flammable liquids.
Failure to keep heater area clear and free of combustible materials, liquids, and vapors can result in substantial property damage,
severe personal injury, or death.
4. Gas control system components must be protected from dripping water during operation and service.
5. If the heater is to replace an existing heater, check for and correct any existing system problems, such as:
 System leaks
 Location that could cause the system and heater to freeze and leak.
 Incorrectly-sized expansion tank
6. Clean and flush system when reinstalling a heater.
NOTE: When installing in a zero clearance location, it may not be possible to read or view some product labeling. It is recommended to
make note of the heater model and serial number.
B. LEVELING
In order for the condensate to properly flow out of the collection system, the area where you locate the heater must be level. Location
must also fully support the weight of the filled water heater.