Specifications

8
2.5 USED-OIL FUEL SYSTEM:
The CB-1750 Central Furnace is available with two choices
of oil pumps that are both rated for use with used-oil applications. The pumps will have
the following description:
Option #1 – Metering Pump Assembly
¾ One (1) Suntec model A2RA-7710 used-oil pump assembly with a 1/20
th
hp motor @
196 rpm, TENV, DP, PS C, sealed, ball bearing, ccw-se rotation, 10 0 AC frame,
parallel shaft, close coupled stud m ounted, 3.42” diameter gear motor, with a 6 uf
(mfd) /250 vac capacitor
¾ One (1) Oil pump relief valve assembly
¾ One (1) Lenz # DH750-100 canister filter with a washable 100-mesh stainless steel
screen filter element
¾ One (1) Oil vacuum gauge
¾ One (1) ¾” x ¾” in-line brass check valve
¾ One (1) ¾” in-line washable 50-mesh stainless steel screen filter element for the
check valve.
Option # 2 – Pressure Style Pump Assembly
¾ One (1) Suntec model J4NB-A1000G used-oil pump assembly with a 1/6
th
hp motor
@ 1,725 rpm, TENV, DP, ball b earing, ccw-se rotation, 48 N frame, parallel shaft,
close coupled, 7 ¼” bolt hole mount (center to center), 5 ½” diameter motor
¾ One (1) Lenz # DH750-100 canister filter with a washable 100-mesh stainless steel
screen filter element
¾ One (1) ) Oil vacuum gauge
¾ One (1) ¾” x ¾” in-line brass check valve
¾ One (1) ¾” in-line washable 50-mesh stainless steel screen filter element for the
check valve
¾ One (1) Oil regulator, surface mounted (used only on burners that use a ‘J’ pump)
2.5.1 The Suntec model A2RA-7710 used-oil pump assembly (option # 1) sh all be installed as
a suction fed only pump and it shall h ave a maxi mum vertical lift capa city of 6 feet of
suction oil line plus a maximum of 4 feet of horizontal suction line.
2.5.2 The Suntec model A2RA-7710 used-oil pump assembly (option # 1) is not an adjustable
pressure range pump. The gear motor is rated to deliver the correct amount of fuel per
hour (1.20 gph) to the burner unit.
2.5.3 The Suntec model A2RA-7710 used-oil pump a ssembly (option # 1) shall have a
washable 234-micron stainless steel fi lter screen installed inside of the pump head.
(Refer to the CB-1750 Operator’s Manual for the proper installation of this pump.)
2.5.4 The suction oil line size for the Suntec model A2RA-7710 used-oil pump (option # 1) shall
be ½” OD copper tubing for the suction line from the used-oil tank to the pump.
2.5.5 The pressure oil line size for the Suntec model A2RA-7710 used-oil pump (o ption # 1)
shall be 3/8” OD co pper tubing fro m the used-oil pump head to t he burner unit with a
maximum run of 10 0 feet of tubing. (Please note that som e installations will allow for a
greater pressure line length. Contact your Auth orized Clean Burn Distributor for more
information.)
2.5.6 The Suntec model J4NB-A1000G used-oil pump assembly (option # 2) shall be installed
as a suction fed only pump and it shall have a maximum vertical lift capacity of 10 feet of
suction oil line plus a maximum of 30 feet of horizontal suction oil line (not to exceed 10”
Hg of vacuum).