BASO L62GB User Manual

Installation Instructions

Issue Date January 20, 2015

© 2015 BASO Gas Products. 1

Part No. BASO-INS-L62GB, Rev. C www.baso.com

L62GB BASO® Safety Shutoff Device

Installation

IMPORTANT: Only qualified personnel should

install or service BASO® Gas Products. These
instructions are a guide for such personnel. Carefully
follow all instructions in this document and all
instructions for the appliance.

!

WARNING: Risk of Explosion or Fire.

Shut off the gas supply at the main manual shutoff
valve before installing or servicing the L62GB.
Failure to shut of 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.

!

CAUTION: Risk of Electric Shock.

Disconnect power supply before making electrical
connections to avoid electric shock.

IMPORTANT: Make all gas installations in
accordance with applicable local, national, and
regional regulations.

To install the L62GB.

1. Turn off power to the appliance.

2. Turn off gas at the main manual shutoff valve
adjacent to the appliance.

3. Remove the L62GB cover by loosening the screw
on the front of the device (not the brass hex nut).

IMPORTANT: Do not loosen or tighten the
brass hex nut that fastens the brass terminal
bushing to the plastic switch housing. The machined
flats on the terminal bushing must be parallel to the
flats on the switch housing. If not, the switch power
unit may distort and cause the safety switch to fail.

4. Mount the L62GB in any convenient position using
the mounting holes in the back of the case.

5. Push the circuit wires through the conduit opening
on the side of the device, strip the ends of the
wires just enough to put the bare wire under the
terminal screws, and attach them to the two wire
terminals.

!

WARNING: Risk of Explosion or Fire.

Do not attach both wires to one terminal on the
L62GB. Doing so bypasses and eliminates all safety
features provided by the L62GB, can lead to an
explosion or fire, and may result in severe personal
injury or death.

!

WARNING: Risk of Explosion or Fire.

Verify that this device is wired in series electrically
with thermostats and other appliance operating
controls. Wiring the device in parallel with such
controls will defeat the safety features of this device
and may result in severe personal injury or death.

6. Replace the cover. Do not loosen the brass hex

nut.

7. Connect the pilot burner orifice fitting to the pilot
outlet on the L62GB with 1/4 in. outside diameter
tubing, and connect the pilot gas inlet with the gas
manifold upstream from the automatic valve.

Note: The pilot line connection is bidirectional as
indicated by the arrows pointing in either direction.
This provides the option of connecting the pilot gas
inlet and outlet in either position.

Attach the thermocouple securely to the pilot burner,
and screw the terminal end to the BASO® power unit
terminal on the L62GB. Make sure that this
connection is clean. Tighten the thermocouple lead
nut finger tight plus a maximum of 1/8 turn. Do not

overtighten.

2 L62GB BASO Safety Shutoff Device Installation Instructions

Red Lever

Transformer

Power Source

Thermostat

"X”

"X”

Main Manual
Shutoff Valve

(”A” Valve)

L62GB BASO

Safety Shutoff Device

Pilot Valve
(“B” Valve)

“X” indicates possible

locations for other controls.

Thermocouple

Lead

Pilot Gas

Outlet

Power Unit

Terminal

76.2 mm (3 in.)
Sediment

Trap

Pilot Gas

Inlet

Basotrol

Valve

Do not loosen brass hex nut.

Must be tight to maintain continuity.

Figure 1: Typical L62GB Installation

Setup and Adjustments

Checkout

!

WARNING: Risk of Explosion or Fire.

Follow this or an equivalent checkout procedure
after installation. Before leaving the installation,
verify that the L62GB 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.

!

WARNING: Risk of Explosion or Fire.

Verify that there are no gas leaks by testing with
appropriate equipment. Never use a match or lighter
to test for the presence of gas. Failure to test
properly 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. Set the thermostat to the lowest setting.

3. Close the main manual shutoff valve (A valve) and
the pilot valve (B valve [see Figure 1]) and wait at
least 5 minutes for unburned gas to escape from
the appliance.

4. Reopen the B valve, push down the red lever and
light the pilot burner. Continue to hold down the
red lever for approximately 30 seconds.

5. Open the A valve. The main burner ignites from
the pilot burner when the thermostat calls for heat.

6. Disconnect the thermocouple from the L62GB.
The main valve should close immediately. If it
does not close, check for wiring errors. Reconnect
the thermocouple to the L62GB when it is
operating correctly.