Honeywell V7335A 3000 Serie Guide Rapide page 2

Maximum operating pressure
The P indication on the housing of the gas control is the
max.
maximum pressure at which the gas control functions safely.
However the maximum operating pressure is limited by the
pressure range of the Modureg concerned
30 mbar for pressure range 1.5 ... 16 mbar
45 mbar for pressure range 3 ... 34
Electrical rating
Voltage: 24 Vdc
Resistance at 20 _C at:
pressure range 1.5 ... 16 mbar: 117 τ
pressure range 3 ... 34 mbar: 127 τ
Current: 15 ...165 mA
WARNING
Do not exceed the maximum current value of 165 mA
Electrical connection
The Modureg is provided with quick connect terminals which
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are suitable for 6.3 mm ( /
fasteners).
Modulation characteristics (see page 12 fig. 2., 3., 4. and 5.)
Modulating graphs are recorded with lowest minimum outlet
pressure setting and highest maximum outlet pressure setting
of the Modureg.
The modulating curve at increasing current from 0 mA will be
in the area between the two curves with arrow head upwards
When current is decreasing from its maximum value the outlet
pressure will be higher (curve with arrow head downwards).
The area between curve 1 and curve 2 as well as the area
between curve 3 and curve 4 indicates the maximum
allowable hysteresis of the Modureg.
NOTE:
Adjustment of minimum outlet pressure setting does not
affect the modulating curve.
Adjustment of minimum outlet pressure setting does
not affect the modulating curve.
Good and reliable performance of the Modureg is not only
dependent on the Modureg itself, but also upon the
reliability of the modulating control and sensor used.
ADJUSTMENT, CHECKOUT AND
MAINTENANCE
IMPORTANT
Adjustments should be made by qualified persons
only.
If the appliance manufacturer supplies checkout
and/or service and maintenance instructions,
carefully follow them. If such instructions are not
provided, then follow the procedure as outlined
below.
Allow time for pressure to stabilize before making
adjustments.
It is recommended that the Modureg is operated a
few times to ensure correct setting.
Take care that after any adjustment cap and
"O"- ring are mounted.
The maximum pressure setting must first be adjusted
because any adjustment of maximum pressure setting
influences minimum pressure setting.
MU1R- -9092 0012R4- -NE
") receptacles (e.g.series "250"
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Adjusting maximum pressure setting (see fig. 1.)
 Disconnect pressure feedback connection (if applicable).
 Connect a suitable pressure gauge to pipe line or to outlet
pressure tap of gas control concerned, to measure burner
pressure (measuring point must be as near to burner as
possible).
 Energize modulating coil, operator, set control in operation
and wait until an outlet pressure is recorded on pressure
gauge.
 Turn the maximum rate adjustment screw clockwise for
increasing or counter--clockwise for decreasing the
maximum pressure setting if adjustment is needed.
 Check minimum pressure setting and readjust if necessary.
 Mount cap and "O"--ring and reconnect pressure feedback
connection (if applicable).
Adjusting minimum pressure setting (see fig. 1.)
 Disconnect pressure feedback connection (if applicable).
 Connect a suitable pressure gauge to pipe line or to outlet
pressure tap of gas control concerned, to measure burner
pressure (measuring point must be as near to burner as
possible).
 Disconnect electrical connection of Modureg.
 Energize operator, set control in operation and wait until an
outlet pressure is recorded on pressure gauge.
 Turn the minimum rate adjustment screw clockwise for
increasing or counter--clockwise for decreasing the
minimum pressure setting if adjustment is needed.
 Check if main burner lights easily and reliable at minimum
pressure.
 Mount cap and "O"--ring and reconnect pressure feedback
connection (if applicable).
If maximum and minimum pressures are set, wire Modureg in
circuit.
Adjusting intermediate pressure setting
Some controls, such as W9335, are able to provide
modulating control as well as a fixed setting.
In case this intermediate pressure setting should be set, it is
necessary to follow the suppliers instructions regarding the
adjustment of the concerned control. It deals with the
switching from modulating mode to fixed setting mode which
is in most cases is a potentiometer.
The fixed setting mode is very often used for central heating,
where on/off adjustable pressure to burner is required.
This intermediate outlet pressure can in general be electrically
set as follows:
 Disconnect pressure feedback connection (if applicable).
 Connect a suitable pressure gauge to pipe line or to outlet
pressure tap of gas control concerned, to measure burner
pressure (measuring point must be as near to burner as
possible).
 Energize operator, set control in operation and wait until an
outlet pressure is recorded on pressure gauge.
 Make sure Modureg is wired in the circuit.
 Bring system in fixed setting mode.
 Adjust current as low as needed to obtain the lowest
pressure by using pressure setting means of controller.
Mechanical setting of Modureg will prevent too low setting.
 Increase the current until desired pressure is obtained by
using pressure setting means of modulating control.
 Mount cap and "O"--ring and reconnect pressure feedback
connection (if applicable).
Checkout
After any adjustment, set appliance in operation and observe
through a complete cycle to ensure that burner system
components function correctly.
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