0503RHC8RJLGBEN
22/34
Figure 12: Modureg V7335A
Legend :
1 : Shaft
2 : Adjustment screw (7mm) for maximum
pressure setting
3 : Adjustment screw (9mm) for minimum pressure
setting
4 :
“O” ring
5 : 6.3mm AMP terminals
6 : M5 pressure feedback connection
To Set Minimum (low fire) 50% or 30% rate (see table)
1. Remove
regulator
cover
cap;
2.
Disconnect electrical connection to the regulator coil;
3.
Energise operator, set control in operation and wait until
outlet pressure is recorded on manometer;
4. Use a 9 mm wrench to turn the minimum rate
adjustment screw clockwise to increase or counter-
clockwise to decrease the minimum pressure setting
The minimum pressure setting must be adjusted first,
because any adjustment of the minimum pressure
setting influences the maximum pressure setting.
To set Maximum (high fire) 100% rate
1.
Follow point 1 above. Connect electrical connection to
the regulator coil and ask for maximum heat;
2.
Using a 7 mm wrench to turn the maximum adjustment
screw clockwise to increase or counter-clockwise to
decrease the maximum pressure setting to the value
stated on the appliance data plate;
3.
Replace cover cap, re-wire coil in circuit;
4.
Operate burner several times in high, intermediate and
low-pressure modes and check performance on the
manometer.
FAULT FINDING “MODUREG” OPERATION :
Follow setting procedure for fault finding
1.
Minimum or Low Fire unobtainable :
- Ambient temperature too high in location of
regulator max 70°C;
-
Check input voltage to coil,
Zero volts is low fire mode, shaft out;
2.
Cannot obtain Maximum or High fire :
-
Open circuit to regulator coil;
Measure coil resistance = 127
Ω
;
-
Short circuit between coil and casing;
Check resistance between one terminal and casing,
reading indicates short circuit;
-
Low voltage to regulator;
Check for correct voltage range, should be: 0
- 24 V DC;
-
Low gas supply pressure;
Check natural gas GB = 17.5-20.0 mbar.
Push down plunger, burner pressure should
rise to high-fire rate;
3. Erratic
operation:
-
Fluctuating or pulsating DC voltage ;
Check using meter, if pulsating suspect input
signal,
transients,
etc...
4. Minimum rate lower than setting required or below
1.5mbar :
-
Minimum pressure set too low; re-adjust;
-
Line supply gas inlet controls regulator faulty
or
requires
adjustment;
Appliance gas tap not fully open
5.8 H
ANDING OVER
Upon satisfactory completion of commissioning and testing,
hand the instructions to the user or their representative.
Advise the appropriate person how to safely use and operate
the air heater and describe the use of appropriate external
controls. Ensure that the person understands how to start
the heater and how to turn it OFF.
Suggest that the instructions are placed close to the air
heater for future reference. In the absence of an appropriate
location fix them to the gas service meter. Ensure they are
not placed where they may restrict the airflow from the
heater or where they may catch fire from a hot surface
. Do
not fix them in the control section.
Advise the person who is resuming responsibility that for
continued safe operation the air heater should be serviced at
least once a year.