Beckett CG4 - Manual (Page 12)

12
Section: PREPARE THE APPLIANCE
Fire and Asphyxiation
Hazard
Failure to comply with manufacturer’s
instructions could result in damage to the
stainless steel combustion chamber
which can result in fire or asphyxiation
hazards.
If retrofitting a CG4 to a stainless steel combustion
chamber, check the appliance manufacturers instructions
to determine if a lining is required and comply with their
recommendations.
Assemble the Burner
Gather the Necessary Parts
1. You have already verified that you received all the
components shipped with the burner.
2. In addition to the parts provided with the burner you
will need ¾” pipe nipples (schedule 40, black iron –
do not use galvanized) to make up the connection
to the supply piping, and pipe joint compound. Pipe
lengths must be selected to fit your installation. We
recommend a 3” to 6” length between the gas valve
and the union.
Prepare the Chassis
1. Determine whether you must add a baffle using the
appliance’s firing rate and Table 5 on Page 10.
2. If a baffle must be added, open the burner’s top
access cover by loosening the two front screws and
pivoting their clips out of the way.
3. Align the baffle between the two pins on the motor
side of the housing ( Figure 6 on Page 13) and
against the housing partition and tap it securely
onto the partition.
4. Determine whether you must change from the 4-slot
air band shipped on the chassis to the blank air
band using the appliance’s firing rate and Table 5.
5. If the air band must be changed, remove the air
proving switch, the shutter and the slotted band
( Figure 7 on Page 14).
6. Install the blank band and return the shutter and
air proving switch in the reverse order from step 5,
tightening the screws securely.
Prepare and Install the Air Tube
1. The air tube may be shipped without the head
installed. If so, align the openings in the swirl vanes
with the flame rod and ignition electrodes and
press the head onto the OD of the air tube until the
head is seated and the screw holes on the sides
align. Use care to avoid bending the swirl vanes or
the front edge of the shroud. Install the retaining
screws packed with the head and tighten securely.
2. Remove 2 screws from the housing end of the air
tube that secure the rear edge of the gas gun.
3. Install the air tube onto the housing with the gas
connection on the top side of the air tube ( Figure
8). Install the (4) ¼-20 screws finger tight. Install
the remaining 4 screws. After all 8 screws are in
place tighten them all securely.
4. Route the ignition (black) and flame sensing
(yellow) wires from the air tube into the chassis.
5. Connect the yellow (flame sense) wire from the
air tube to the yellow wire in the chassis, and take
up all slack in the wire by pushing it back into the
electrical box.
6. Connect the black (ignitor) wire to the igniter with
the access cover partially closed. Close the cover,
secure it with its retaining clips, and tighten the clip
screws securely.
Assemble the Gas Valve and Manifold
1. You will need to provide a ¾” schedule 40 black
iron pipe nipple (3” to 6” long is convenient) and
joint compound to complete this assembly. Refer to
Figure 9 on Page 15.
2. Install the factory assembled burner manifold
(mounting block, 2 nipples and elbow)on the
outlet side of the valve (the side the arrows point
towards), following the valve manufacturer’s piping
instructions supplied with the valve.
3. Install a ¾” pipe nipple and union on the inlet side
of the valve, following the valve manufacturer’s
piping instructions supplied with the valve.
The gas valve is sensitive to
its installation orientation.
It must only be installed in horizontal piping
with its electrical connections on top as
shown in Figures 9 and 10.
Explosion, Fire, and Gas
Leak Hazard
y Do not disassemble gas valve
y Do not use Teflon tape on gas piping.
Damage to gas valve seats and bodies
could cause gas leaks and result in
asphyxiation, explosion, or fire.
y Valve must be installed with flow direction arrow
pointing to burner.