159
MAC 6000 Hydronic Heater
Riello Burner
2106 East Indiana Ave., Bismarck, ND 58504 U.S.A. • www.macheaters.com • +1-800-272-4604
2453
8
GB
TWO LINE (LIFT SYSTEM)
A) The burner is shipped with the pump set to oper-
ate on a two line system. Suction and return lines
(6 & 7 in drawing on page 7) should be the same
diameter and both sho uld extend to th e same
depth inside the fuel tank.
Be sure there are no air leaks or blockages in the
piping system. Any obstructions in the return line
will cause failure of the pump shaft seal. Do not ex-
ceed the pipe lengths indicated in the table.
B) Attach the two PIPE CONN ECTORS (2) to the
pump SUCTION and pump RETURN PORT S (6
and 7).
Attach the required piping to these two pipe con-
nectors using the NPT/METRIC ADAPTERS that
are supplied with the burner.
PUMP PURGE
TWO LINE (GRAVITY OR LIFT SYSTEM)
Turn off the main power source to the burner and re-
move the air tube cover. Shine a light source on the
photo cell on the control box (now visible where the air
tube cover was removed ), return power to the burner
and activate the burner.
With the light source in place, the burner will operate in
prepurge only.
When the pump is sufficiently purged, the hydraulic air
shutter will open.
Once the burner is purged, turn off the power source
and replace the air tube cover. Return power to the
burner. The burner is now ready to operate.
NOTE: To protect the pump gears, it is advisable to lubri-
cate the pump prior to purging a lift system.
Apply oil through the VACUUM PORT (A).
WARNING:
- Pipe dope or Teflon tapes are NOT to be used on
any direct oil connection to the fuel pump.
- The height ‘P’ in Pipe Length Charts should not
exceed 13 feet (4 m).
- The vacuum should not exceed 11.44 inches of
mercury.
IMPORTANT:
An external, appropriately listed and certified oil
filter must be placed in the fuel line between the
fuel tank and the burner pump.
ATTENTION:
It is important that the fuel line be completely sealed and free from air leaks or any internal blockages.
WARNING!
WHEN THE BYPASS PLUG IS INSTALLED, A TWO PIPE SYSTEM MUST BE USED OR FAILURE OF THE
PUMP SHAFT SEAL WILL OCCUR.
2 LINE (LIFT) SYSTEM - PIPE LENGTHS
H3/8” OD1/2” OD
Feet Meters Feet Meters Feet Meters
0 0.0 115 35 330 100
1 1/2 0.5 100 30 330 100
3 1.0 80 25 330 100
5 1.5 65 20 295 90
6 1/2 2.0 50 15 230 70
9 1/2 3.0 25 8 100 30
11 3.5 20 6 65 20
D6008
H
P
H
ATTENTION:
do not exceed
pipe lengths
indicated in chart!
A
D6181
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