Start-Up Checks - Lochinvar Commercial Electric Water Heaters Installation And Service Manual

NOTE:
The cold water supply must be left in the open
position when the water heater is in use.
5. Check the nearby hot water faucet to verify that air is
exiting the tank as it fills with water. Allow water to run
until a constant flow is obtained at the faucet. This will
insure that all air is purged from the system.
CAUTION
The power supply must remain off until the water
heater and all related piping are completely filled
with water to insure that there will not be a possible
problem with heating element burn out.
6. While the tank is filling, open the electrical control
panel and set the immersion thermostat(s) to the
desired water temperature. Open the element access
panel to set the surface mount thermostats above each
immersion heating element. If equipped with multiple
thermostats, all individual thermostats may be adjusted
to the same temperature set point or they may be set a
2° to 4°F (1˚ to 2˚C) apart to step the elements on in
stages.
7. When a constant flow is obtained at the faucet, it may be
turned off. The temperature and pressure relief valve
should be manually opened to insure that there is no
captive air in the storage tank. A constant stream of
water must flow from the manually opened relief valve.
Release the handle on the relief valve and allow it to
close after water flow is observed.
8. Carefully check the tank, pipe and fittings for any sign
of a water leak. Immediately repair as needed. Open the
access door to the immersion heating elements and
check for leaks at the element mounting flanges. If any
leak is detected, tighten the screw-in element.
START UP
9. Ensure that the electrical access panel (field wiring
compartment) is closed and the heating element access
panel is in place before proceeding.
10. After assuring that the tank is completely filled with
water and no leaks are detected, you are now ready to
start operation of the water heater.
11. Turn on the electric power at the main disconnect
point. On immersion thermostat models, the
contactors should be energized as the elements start to
heat the water in the tank.
12. As the water heater starts heating, check the contactors
for "buzzing" or "chattering" during operation. If noise
is detected, turn off main power, open the control panel
and clean the contact points of the magnetic
contactor(s). Remove any dust, dirt or foreign matter
that may have found its way into the contactor or other
electrical components in the control panel during
shipping, installation or service.
13. Close the electrical control panel and turn on main
power.
14. The water heater is now ready for normal operation.
INITIAL START UP CHECKS
The following checks should be made by the installer when
the water heater is placed into operation for the first time.
WARNING:
HAZARD OF ELECTRICAL SHOCK - Before
opening the access panel to perform service on any
electrical component, make sure the electrical supply
to the water heater is turned "OFF". Failure to do this
could result in death, serious bodily injury or
property damage.
1. Allow the water heater to heat for approximately thirty
minutes after following the filling and start up
procedures.
2 Turn off the main electrical power to the water
heater. If the power disconnect point is out of sight, lock
it in the open ("OFF") position and tag to prevent
unexpected application of power.
3. Open the electrical control panel door and feel each wire
connection and fuse clip for excessive temperature. If
any connection is found to be excessively hot, check the
tightness of the connection. Check all factory internal
wiring connections and the field made main power
connections for tightness.
4. Close and lock the electrical control panel door.
5. Turn on the main electrical power to the water heater.
6. Temperature control and contactor operation should be
checked by allowing the water heater to come up to
temperature and shut off automatically.
7. The water heater is now ready continuous normal
operation.
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