A.O. Smith COF 199, Инструкция по установке, эксплуатации и обслуживанию

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The electricity supply must comply with the requirements
below:
Supply voltage Frequency Fuse
230 V AC 50 Hz 6 A
(-15% / +10%) (+/- 2%)
The electrical diagrams of all connections in the control
box are shown in the appendix, (see figure 9: Electrical
diagram).
2.2 Commissioning
2.2.1 Filling the heater
1. Fit drain valve and check that it is closed.
2. Open the cold-water tap to the heater and all
hot-water outlets in order to remove all air from the
system. The heater has been filled when cold water
runs out at all outlets.
3. Close all taps at the hot water draining points. The
heater is now under water mains pressure. At this
pressure, which can be read on a manometer, the
relief valve must not release any water.
2.2.2 Turning on the burner
The burner must be turned on in accordance with the
installation manual supplied with the front-mounted
burner.
2.3 Shutting down
For brief periods:
1. Turn the temperature control knob fully clockwise
(up to 40°C) and set the ‘I/0’ switch to ‘0’.
For longer periods:
1. Switch off the supply voltage by operating the
bipolar main switch;
2. Close the inlet gas valve;
3. Close the water inlet tap;
4. Empty the heater to prevent frost damage.
2.4 Usage / temperature control
The water temperature is controlled by the control box on
the heater. If the temperature in the water heater drops
below the set value, the control box will send a voltage
signal to the ventilator burner. The burner automation of
the ventilator burner will then ignite the burner and keep it
burning until the control box ceases to supply voltage
signals.
The desired water temperature can be set between 40°C
and 80°C. High water temperatures cause more calcium
precipitation in the water heater. Moreover, the stand-by
losses of the water heater are greater with higher
temperatures. Therefore, it is recommended to set the
control thermostat to approx. 60°C.
For reasons of safety, the water heater is equipped with a
high-limit thermostat and an overheating cut-out. If the
high-limit thermostat is activated, the heater is not locked
and the control thermostat will take over the temperature
2.1.3 Gas connection
The gas supply to this appliance must be installed in
accordance with BS 6891 (1988) and British Gas
Publications UP1 and UP2. No heat or soldered joints
should be applied in the vicinity of the gas control, as
they could cause damage to the control. All connections
and joints should be tested for gas soundness with a
suitable leak detector (do not use a naked flame). When
operating this unit on LPG a suitable gas supply cock
should be used.
2.1.4 Flue gas exhaust
For the COF 199 and 700 the adapter ring supplied must
be fitted prior to connecting the flue gas exhaust. For the
other models (COF 245, 315, 385, 455 and 700) the flue
gas exhaust can be connected direct to the water heater.
The flue pipe, which is protected against corrosion, must
at least have the same diameter as the mounting flange
on the water heater. For units with an oil-fired burner, a
stainless steel flue pipe must be installed.
The following diameters of flue gas exhaust pipes apply:
2.1.5 Burner connection
For connecting the ventilator burner, please refer to the
instructions supplied with the burner.
Read these instructions carefully before attempting to
install and connect the burner.
2.1.6 Electrical connection
All electrical connections must be carried out in
accordance with IEE regulations by an accredited
electrical installation company.
The control box must be connected to the mains by
means of a permanent electrical connection. A bipolar
main switch with a contact opening of at least 3 mm must
be fitted between this permanent connection and the
heater.
The supply cable must have cores of at least 3 x 1.0
mm
2
. The connecting clamps for the supply voltage are
located on the connector strip in the control box. Always
check with a voltage tester if the live and the neutral have
indeed been connected correctly in the control box. This
is essential for the functioning of the ventilator burner’s
flame detection.
COF 199 150
COF 245 200
COF 315 200
COF 385 200
COF 455 200
COF 700 250
UNIT Diameter flue gas
exhaust pipe [mm]