BASO BGD278 Series BASOTROL CE Approved Gas Valve - Manual (Page 3)

BGD278 Series BASOTROL CE Approved Gas Valve Installation Instructions 3
Wiring
!
WARNING: Risk of Shock.
Disconnect the power supply before making electrical
connections to avoid electrical shock or equipment
damage. Ensure that the operating voltage is identical
to the information on the product identification label.
The BGD278 valve is supplied with 3-tab or 2-tab
electrical connections. The solenoid coil has male tabs,
and electrical connections should be made using 1/4 in.
(6.35 x 0.8 mm) female, fully insulated push-on
terminals. The earth ground is clearly labeled.
The electrical wiring to a twin solenoid valve from an
electronic intermittent proven pilot ignition system is
comprised of two lines; a common and an independent
earth ground. Wiring can be done using a single 4-wire
cable. The wiring connections for a 4-wire cable are
shown in Figure 5.
Route the electrical cable for the valve solenoid from
the burner sequence control to the valve and make
wiring connections in accordance with Figure 5
Note: Electrical connections can also be made using
pre-wired electrical plugs DIN 43650 (available from
BASO Gas Products or a BASO distributor).
Note: All wiring must be in accordance with national
and local electrical codes and regulations.
Setup and Adjustments
Checkout
!
WARNING: Risk of Fire or Explosion.
Follow this or an equivalent checkout procedure after
installation. Before leaving the installation, verify that
the gas valve functions properly and that the system
has no gas leaks. Gas leaks can lead to an explosion
or fire, and may result in severe personal injury or
death.
Make sure all components are functioning properly by
performing the following test:
1. Test all joints and connections for leaks with a soap
solution.
2. Close the main upstream shutoff valve and wait at
least 5 minutes for unburned gas to escape from
the appliance, and then reopen the shutoff valve.
3. Turn on the main electrical power switch and close
the thermostat contacts. The appliance should
operate in accordance with the manufacturer’s
specified sequence of operation.
4. Turn the thermostat to a low dial setting to open the
contacts. All burner flames should be extinguished.
Repeat Steps 3 and 4 at least three times.
5. Return the thermostat to a normal setting before
leaving the installation.
Regulator Adjustment
IMPORTANT: All adjustments must be made in
conjunction with the gas appliance and in accordance
with the appliance manufacturer’s instructions. Only
authorized personnel should make adjustments.
!
WARNING: Risk of Fire or Explosion.
The minimum flow rate of the valve must not be
adjusted below the minimum safe working rate of the
appliance. This may cause gas leaks, which can lead
to an explosion or fire and may result in severe
personal injury or death.
The BGD278 can have a bottom adjust, right or left-
handed top adjust spring pressure regulator. Right or
left-hand orientation is determined by the position of the
adjustment when looking into the inlet connection of the
valve.
The regulator controls the gas pressure at the valve
outlet by positioning the regulator poppet for selected
throughput flow and pressure. This is achieved by the
valve outlet pressure acting on the regulator diaphragm,
which balances against the preset regulator spring.
Adjustment of the spring compression determines the
valve outlet pressure and the throughput flow rate.
To adjust the outlet pressure, remove the leak-limiting
seal cap to expose the adjusting screw (see Figure 4).
Turn the screw (using a suitable screwdriver) in a
clockwise direction to increase the pressure or in a
counterclockwise direction to decrease the pressure.