CLEAN BURN CB-3500 series, Operator'S Manual

Page: 52 / 134

Operator's Manual: Models CB-3500 & CB-5000
4-16
Figure 4K - Pressure Relief Oil Line Back to the Tank
Installing the Pressure Relief Oil Line Back to the Tank
ATTENTION: It is critical that you adhere to the following specifications for plumbing the pressure relief back
to the tank.
The metering pump requires the installation of a pressure relief oil line back to the tank that you are pulling oil
from as shown in Figures 4F, and 4J.
• The
pressure relief
will open and relieve pressure if there is a restriction in the pressure oil line,
clogged nozzle, etc.
Be sure to use Permatex #2 non-hardening gasket sealer to seal every threaded fitting. DO NOT use teflon tape or
teflon pipe dope compounds.
1.
Refer to Figure 4K.
2. Remove the plug from the relief port on top of the metering pump head.
3. Install the 1/8 NPT x 1/4 tube compression fitting in the relief port on top of the metering pump head.
4. Install 1/4" O.D. copper tubing (user-supplied) from the pressure relief port back to the oil tank.
Refer to Figure 4J as needed.
I89004-D
# PART # DESCRIPTION
1 32475 METERING PUMP HEAD (7720)
2 32526 MINI BALL VALVE 1/8 MNPT X 1/8 FNPT
3 INSTALLER SUPPLIED 1/8 MNPT X 3/8 OR 1/2 FLARE
4 INSTALLER SUPPLIED 3/8 OR 1/2 COPPER OR ALUM. TUBING
5 INSTALLER SUPPLIED 3/8 OR 1/2 TUBE FLARE NUT
6 INSTALLER SUPPLIED 1/4 COPPER OR ALUM. TUBING
7 32037 1/8 MNPT X 1/4 TUBE COMP. FITTING
SUPPLY
TO BURNER
RETURN
TO TANK
7
3
1
A2R
A-7720
R H R
OTATION
INLE
T
GA
UGE
RELIEF
2
4
5
6