LAARS Multi Flue CF-100-3 - Install and Operating Manual - Manual (Page 10)

10
Oil tanks and Piping Continued-
D. Suction Line: It is recommended that extra heavy wall copper tubing be
used for this line. If standard wrought iron pipe is used. It should be
scale free and not smaller than 5/8" OD. Copper tubing should be
installed to connect the pipe to the fuel unit. Where tubing is used, one
complete loop should be made in the tubing to connect the pipe to the
fuel unit. Where tubing is used, one complete loop should be made in
the tubing immediately below the fitting connecting it to the oil pump in
order to reduce transmission of noise and to prevent strain on the
burner. When the top of the oil storage tank is below the level of the fuel
unit, high points or air pockets in the suction line must be avoided
between the oil storage tank and the fuel unit, and a 5/8" OD ball check
valve should be installed to prevent the return of the oil to the oil storage
tank during the off cycle period of the burner. Do not run suction or
return line overhead as this greatly increases the possibility of air
pockets, oil leaks, siphoning and transmission of noise. When the top of
the oil storage tank is above the fuel unit and gravity feed to the unit is
not permitted, the suction line should be run to a point above the tank
where an approved anti-siphon valve and a 5/8" OD gate valve shall be
installed. These valves shall be installed inside. No ball check valve is
required, but a union should be installed between the gate valve and the
strainer to facilitate the removal of the strainer for cleaning when
necessary.
E. Return Line: The return line should be the same size as a suction line
and run as directly as possible from the return opening in the
fuel unit to the oil storage tank and should extend into the oil storage
tank to the same depth as the suction line.
F. Pressure Test for Buried Oil Lines: It is important that buried oil lines
be thoroughly tested for leaks before being covered.
CAUTION
DO NOT USE GASOLINE, CRANKCASE DRAININGS,
OR ANY OIL CONTAINING GASOLINE
OPERATION
Filling the Water Heater
1. Close the water heater drain valve by turning the handle clockwise.
2. Open the cold water shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows at the hot water faucets, the water
heater is filled. Close the faucets and check for water leaks at the
temperature-pressure relief valve and the hot and cold water
connections.