Applications; Part 4 - Wiring - Westinghouse WEC080C2X030 Use And Care Manual

10
When filling the water heater, open a hot water tap to release
air in the tank and piping. The tank must be full of water before
the heater is turned on. Failure to ensure the water heater is full
before turning it on could result in damage to the water heater
and other property damages. Such damages ARE NOT covered
by water heater warranty.
H. Applications
Figure 4 - Piping Detail - NOTE: Drawing is meant to demonstrate
system piping concept. Heat traps are optional.
PIPING NOTES:
The following notes are applicable to all of the piping applications
demonstrated on this page.
1. Minimum pipe size should match connection size. Upsize pipe
accordingly if greater flow is required.
2. A thermal expansion tank suitable for potable water must be sized
and installed within this piping system between the backflow preventer
and the cold water inlet.
3. All circulators should have an integral flow check.
4. Drains and check valve between unit and storage tank will assist in
purging air from system.
5. These drawings are meant to demonstrate system piping only. The
installer is responsible for all equipment and detailing required by local
codes. In Massachusetts, you must install a vacuum relief valve per 248
CMR.
6. Mixing valve application is optional, but recommended to help
prevent scalding. See Part 3 for more information.
whl-035 Rev. 4.5.16

Part 4 - Wiring

Tank must be full of water before the power is turned on.
Heating elements will be damaged if energized for even a
short time while tank is dry. Failures due to "dry-firing" ARE
NOT covered by warranty.
This unit is factory wired to a junction box on top of the water
heater for field wiring connection. These heaters are equipped
and wired for the maximum possible input allowable (see Table
3 for listing of inputs and amperage requirements). The voltage
requirement and dedicated wattage load for the heater is
specified on the rating label of the water heater. Consult your
local power company to determine if your electrical service is
adequate for the additional load of the heater.
Refer to the wiring diagrams for field connections. All wiring
must conform to local code and the National Electric Code,
and should be done by a qualified licensed electrician or the
local electric utility. Grounding can be accomplished by using
approved conduit and fittings or other approved conductive
material. A grounding wire is provided on the junction bracket.
This grounding wire must be used in the installation.
Be sure to ground the water heater. The preferred way to
ground is with rigid metal conduit between the main panel
and the water heater junction box with approved end fittings
(check codes on the use of flexible conduit). If making a
separate ground, a green ground wire is provided in the
water heater junction box. Replace the junction box cover
and insulation after you have made the wiring connections.
Failure to follow these instructions could result in property
damage, severe personal injury, or death.