BASO BGH2UNCNTRLHT-01 - Manual (Page 6)

6 BGH2UNCTRLHT-01 Universal Hot Surface Ignition Control Installation Instructions
Replacing the Existing Ignition Control
!
CAUTION: Risk of Electric Shock.
Disconnect power supply before making electrical
connections to avoid electric shock.
!
WARNING: Risk of Explosion or Fire.
Shut off the gas supply at the main manual shutoff
valve before installing or servicing the control.
Failure to shut off the gas supply can result in the
release of gas during installation or servicing, which
can lead to an explosion or fire, and may result in
severe personal injury or death.
!
WARNING: Risk of Explosion, Fire, or
Electric Shock. Label all wires before they are
disconnected when replacing or servicing the
control. Wiring errors can cause improper or
dangerous operation and may result in an explosion,
fire, or electric shock leading to severe personal
injury or death.
To remove the existing ignition control:
1. Shut off power to the appliance.
2. Turn off the gas at the main manual shutoff valve
adjacent to the appliance. (If the manual shutoff
valve services more than one appliance, be sure
to light the other pilots before leaving the
installation.)
3. Label each wire with the correct terminal
designation prior to disconnection.
4. Disconnect the wires from the existing control.
5. Remove the screws holding the ignition control to
the valve (if direct valve-mount model) or remove
the screws holding the control to the appliance
chassis (if foot-mount model).
6. Remove the old ignition control and discard.
IMPORTANT: Do not mount the control where
it can be exposed to direct infrared radiation from the
main burner or to temperatures in excess of the
maximum product temperature rating.
7. Mount the new control with #6 sheet metal or
machine screws through the mounting holes in
the enclosure.
8. Refer to the Wiring section for electrical
connections and wiring diagrams. Perform the
Checkout
section before leaving the installation.
9. Check all wiring for proper connections and make
sure your system is properly grounded.
Wiring
!
WARNING: Risk of Explosion or Fire.
Locate all safety, limit, and operating controls in
series with the thermostat terminal (TH) on the
ignition control. Improper installation may cause gas
leaks, which can lead to an explosion or fire and
may result in severe personal injury or death.
Refer to Figure 1 and Figure 2 for wiring diagrams. All
wiring should be in accordance with the National
Electrical Code (NEC) and all other local codes and
regulations.
Check the voltage rating marked on the control and
make sure it is suited to the application. Use a Class 2
transformer capable of providing 24 VAC under
maximum load, including valves. A transformer having
excessive primary impedance due to poor coupling
affects the ignition potential.
The control is supplied with a jumper wire between
Sense (terminal 10) and 120/240V Hot HSI
(terminal 7). With the jumper in, flame is sensed
through the high voltage HSI (Hot Surface Igniter)
wire. The jumper must be removed for external flame
sense and the sense electrode wired to the Sense
terminal.
!
WARNING: Risk of Electric Shock.
Before applying power to the control, connect all
wires properly to the controller. Verify the controller
is properly grounded. Failure to follow this procedure
can cause electric shock and may result in severe
personal injury or death.