Fuel Line Installation; Wiring Connection Diagram - Beckett NX Series Manual

Figure 6. – Outside Buried Tank-Lift System
NOTICE
To further protect the fuel supply system and reduce noz-
zle orifi ce plugging with fi ring rates below 0.75 gph, a dual
fi ltration system can be installed. This typically consists of
a 50 micron primary fi lter, located near the fuel tank and a
secondary fi lter rated for at least 10 microns located near
the burner.
Fuel supply below the level of the
•
burner –
When the fuel supply is more than eight feet below
the level of the burner, a two-pipe fuel supply sys-
tem is required. Depending on the fuel line diam-
eter and horizontal and vertical length, the instal-
lation may also require a two-stage pump. Consult
the fuel unit manufacturer's literature, included
with the burner, for lift and vacuum capability.
Fuel line installation –
•
• Continuous lengths of heavy wall copper tubing
are recommended. Always use fl are fi ttings.
Never use compression fi ttings.
• Always install fi ttings in accessible locations.
Proper routing of fuel lines is required to prevent
air cavitation and vibration.
Page 10
Wiring Connections Diagram
•
WARNING
!
Electrical Shock Hazard
Electrical shock can cause severe per-
sonal injury or death.
• Disconnect electrical power before installing or
servicing the burner.
• Provide ground wiring to the burner, metal control
enclosures and accessories. (This may also be
required to aid proper control system operation.)
• Perform all wiring in compliance with the Nation-
al Electrical Code ANSI/NFPA 70 (Canada CSA
C22.1)
Refer to the appliance manufacturer's wiring dia-
gram prior to connecting the burner wiring. All wir-
ing must be in accordance with the latest revision
of National Electric Code NFPA 70 and all local
codes and regulations.
The R7184 primary control with valve-on delay
and burner motor-off delay, shown in Figure 6,
requires a constant 120 volt AC power source
supplied to the black wire on the control. (Refer-
ring to Figure 8 and the appliance manufacturer's
instructions.) The red wire goes to the appliance
limit circuit. Please note that other control manu-
facturers may use different wire colors for power
and limit connections.
Figure 7. – Burner Connections.
SK9806
RWB 6104 WMNX