John Wood Commercial - ANED - Manual (Page 17)

Page 16
GENERAL HOUSEKEEPING
As a precaution against fire, and to maintain an adequate flow
of combustion air to the heater:
- Keep the appliance area clear and free from com-
bustible material, gasoline and other flammable
vapours and liquids.
- Keep any ventilation and combustion air openings
unobstructed.
- do not pile cartons, papers or combustible materials on
top or around the heater. Maintain clearances to
combustible construction unobstructed.
TEMPERATURE AND
PRESSURE RELIEF VALVE
The temperature and pressure relief valve (T&P valve) is a
part of the safety equipment on the water heater. In order to
keep the T&P valve functioning properly, operate the valve at
least once a year by lifting the manual lever until water dis-
charges from the overflow pipe.
CAUTION: The water flowing from the valve will be HOT.
Keep hands and feet away from the stream of water.
Take care that discharging water does not damage any
flooring, carpeting or other parts of the building which
may be damaged by water.
See also section on T & P valve in the “installation Section”
WATER TEMPERATURE REGULATION
The thermostat is adjusted to its lowest temperature position
when shipped from the factory. The temperature of the water
can be selected by setting of the temperature dial on the front
of the gas control. The normal setting corresponds to approx-
imately 130
o F.
GAS CONTROL
The gas control is equipped with an energy cutoff switch,
E.C.O., which functions as a high limit safety switch. When
the water temperature exceeds the fixed cutout temperature,
the switch will cycle open. This will interrupt the pilot valve cir-
cuit and stop all gas flow through the control.
Two types of E.C.O. limits are manufactured:
1. Recycling
2. Non recycling.
The recycling E.C.O. switch will open when water temperature
exceeds fixed cutoff temperature. When the temperature in
the tank cools sufficiently (approximately 120 o F) the switch will
close. This will re-establish the electrical circuit and permit the
pilot to function through E.C.O. If recycling of the E.C.O.
occurs, it indicates that a problem exists in the heater or
installation which must be corrected.
The non-recycling E.C.O. switch will open when water temper-
ature exceeds fixed cutoff temperature. It will not close circuit
again when the water temperature cools. When this contact
opens, it indicates that a problem exists in the heater which
must be corrected before a new control is used in the water
heater. If single cycle energy cutoff switch opens contact, the
control must be replaced.
For gas control replacement, contact your local gas utility, or
a qualified service person. The replacement control must be
an identical model to the control which has been removed.
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation.
TEMPERATURE
Set temperature as low as possible to provide an adequate
supply of hot water. This will reduce heat loss and extend the
life of the glass lining. Every “notch” on the dial of the gas con-
trol corresponds to approximately a 10
o increment in water
temperature.
HIGHER SETTING INCREASES
THE RISK OF SCALD INJURY
In households with children or invalids and elderly, select a
lower temperature setting. To reduce the risk of scalding,
valves for reducing point of use temperature by mixing cold
and hot water are available. Consult a licensed plumber or the
local plumbing authority.
EXPOSURE TO WATER
TAMPERING
Tampering with the thermostat, gas valve, igniter control or
temperature and pressure relief valve is DANGEROUS and
voids all warranties. Only qualified personnel should service
these components.
IMPORTANT
Should the water heater be subjected to flooding,
fire or other unusual condition, turn off gas at the
manual gas shut-off valve and water at the inlet
valve to the heater. Do not put the heater in
operation until a qualified gas technician has
inspected and replaced any part of the gas control
system that has been underwater.