John Wood Commercial - 300-400K BTU - Manual (Page 4)

4
precautions
DO NOT uSE THIS WATER HEATER IF ANY PART HAS
bEEN uNDEr WATEr. Immediately call a qualified
service agency to inspect the water heater and to make a
determination on what steps should be taken next.
If the unit is exposed to the following, do not operate heater
until all corrective steps have been made by a qualified
service agency.
1. External fire.
2. Damage.
3. Firing without water.
grounding instructions
This water heater must be grounded in accordance with the
National Electrical Code and/or local codes. These must
be followed in all cases. Failure to ground this water heater
properly may also cause erratic control system operation.
This water heater must be connected to a grounded metal,
permanent wiring system; or an equipment grounding
conductor must be run with the circuit conductors and
connected to the equipment grounding terminal or lead on
the water heater.
hydrogen gas flammable
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
Hydrogen gas can be produced in a hot water system served
by this water heater that has not been used for a long period
of time (generally two weeks or more). Hydrogen gas is
extremely flammable. To reduce the risk of injury under these
conditions, it is recommended that a hot water faucet served by
this water heater be opened for several minutes before using
any electrical appliance connected to the hot water system. If
hydrogen is present there will probably be an unusual sound
such as air escaping through the pipe as the water begins to
flow. THErE SHOuLD bE NO SMOkINg Or OPEN FLAME
NEAr THE FAuCET AT THE TIME IT IS OPEN.
general safety information
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting devices such as
mixing valves must be installed
when required by codes and to
ensure safe temperatures at fixtures.
Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
Verify the power to the water heater is turned off before performing any service procedures.
Improper installation, use and service may result
in property damage.
Do not operate water heater if flood damaged.
•
Inspect anode rods regularly, replace if damaged. •
Install in location with drainage.
•
Fill tank with water before operation. •
Properly sized thermal expansion tanks are required on all
closed water systems.
•
Refer to this manual for installation and service.
CAUTION