Masport CARDRONA ACC, Owner'S Manual And Installation Manual

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GAS PRESSURE ADJUSTMENT.
All pressure adjustments must be made while the heater is operating. Part or all of the right hand
side panel of the cabinet may be removed to gain access to the gas valve. See ACCESS POINTS on
page 11.
GAS PRESSURES ECS ACC STD
kPa
NG ULP
G
PROP NG ULPG PROP NG ULPG PROP
High Pressure 0.9 2.0 2.0 0.85 2.2 2.2 0.85 2.2 2.2
Turndown Pressure 0.35 0.5 0.5 0.43 1.36 1.36 0.23 0.7 0.7
STD MODELS. These have a pressure regulator separate from the control valve. Set the pressure to the
figures in the Table. The pressure test point is on the side of the regulator and the adjusting screw is
on the top. Slacken the lock-nut and rotate the screw by hand, screwing down to increase the pressure.
After adjusting, tighten the lock nut and confirm the correct pressure. Use the pressure test point on
the valve to check the turndown pressure. It is adjusted by turning the small screw on the valve.
ACC MODELS. These have a pressure regulator inside the control valve. There are two test points side
by side on top of the control valve – the outlet pressure test point is the one closer to the flame size
control. If adjustment is necessary, uncouple the control rod from the top of the flame size control
knob on the valve, extract the screw down the centre of this knob and pull the knob off vertically. The
high pressure is then set by rotating the knurled plastic wheel exposed by removing the knob. Once the
pressure is correct (see Table), care must be taken not to turn the plastic wheel when the knob is re-
fitted in its maximum anti-clockwise position. This position is set when the skirt of the knob contacts
the adjacent metal up-stand. After re-fitting, rotate the knob clockwise and then fully anti-clockwise to
verify that the pressure is correct before replacing the retaining screw and re-coupling the control rod.
The turndown pressure is not independently adjustable. It should approximate the values shown in the
Table.
ECS MODELS. These also have a pressure regulator in the control valve. The outlet pressure test point
is on the top of the control valve and is the one furthest from the gas inlet connection. There are two
pressure settings to adjust, high and turndown Access to the adjusters is gained by first removing the
heat shield above the valve and then removing the protective transparent cap at the top of the control
valve modulating coil. This will expose the central screw (turndown pressure adjuster) and a 10mm
hexagonal nut surrounding it (high pressure adjuster). Note that the modulating coil may be rotated
through 90° if necessary to provide easier access for pressure adjustments. Before adjusting the high
pressure, the fire must be alight and burning at the ‘HIGH’ setting. (Hold down the + end of the top
rocker switch on the handpiece for 30 seconds to ensure this).
Set the high pressure first to the figure in the Table. Adjust, if necessary, by rotating the 10mm nut,
screwing down to increase the pressure.
Before setting the turndown pressure, remove one of the blue wires connected to the top of the
modulating coil. There is no need to alter the handpiece control setting. Adjust the turndown pressure
to the figure in the Table by rotating the central Phillips head screw, taking care not to shift the
position of the already adjusted 10mm hex. nut. Screw down to increase the pressure.
Replace the protective cap above the adjusters, re-fit the blue wire to the modulating coil, rotate the
assembly above the coil to its original position and re-fit the heat shield above the valve.
FAN
STD MODELS. Plug the fan lead into a 230 volt power outlet and check that the fan operates correctly
on all speeds.
ACC MODELS. These have a Thermodisc heat operated switch incorporated in the fan wiring circuit to
prevent the fan from running until the firebox has reached working temperature. The fan can be started
about ten minutes after the fire has been lit on ‘HIGH’. When it starts, verify correct operation on all
speed settings.
ECS MODELS. These have a Thermodisc also (see the previous paragraph). Once the firebox has heated
up, check the fan operation by pressing the lower rocker switch on the remote control handpiece.
Pressing the + end repeatedly will increase the speed through all four fan speed settings (three speeds
and off), while pressing the – end will step it down through the speeds. Verify correct operation.
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