– 5 –
to each burner as possible to prevent air from being drawn through the return line.
E. Before teeing into an existing oil line, check the vacuum gauge in the 1/4" inlet port or the vent
opening. A single-stage pump should not exceed 12" hg vacuum and a two-stage pump should not
exceed 17" hg vacuum on two-pipe systems.
If the heater performs poorly, recheck the vacuum reading – a high reading will in di cate too much
resistance
. This could be caused by a clogged filter, a re strict ed shutoff valve, kinked tubing, an ob -
struc tion in the oil line, ex ces sive lift or too long a run.
F. If none of the above in stal la tions are suitable, Bock rec om mends an oil boost er pump lo cat ed as
close to the oil supply as pos si ble. Use the existing supply and re turn lines for the booster pump.
Change the ex ist ing unit to a one-pipe system and tee off the one pipe to sup ply oil to the water
heater.
WARNING: When
an appliance using a float valve between the supply tank and the burner is connect-
ed to a supply tank with a capacity over 40 L(9 imperial gallons), a valve operated by a fusible link shall
be installed in the fuel line adjacent to, and upstream from, the float valve.
The water heater shall be connected to a vent system having sufficient draft at all times to ensure safe
and
proper operation of the unit. Using “L” or “A” type venting, con nect the heater to the chimney. The
size of the connector shall not be smaller than the size of the flue on the water heater. Run a sep a rate
connector from the heater to the chim ney where pos si ble. If the heater must be joined to another oil
appliance
connector before going into the chimney, enlarge the existing connector to ac com mo date
the extra volume of gases from the heater. The entrance into the connector should be at a 45
O
an gle.
Wiring must be done in ac cor dance with the National Electrical Code and local or di nanc es. Burners
are supplied with an operating thermostat (Honeywell L4103A or Carlin EZ-Temp 90000B on 72E,
Honeywell L4006A or Carlin EZ-Temp 90000C or Carlin EZ-Temp 90300B on the 361E, and Honeywell
L8100C
or Carlin EZ-Temp 90300B on 541E). Models 361E and 541E equipped with Honeywell
controls are also supplied with a separate L40801B high limit (see wiring diagrams). The operating
ther mo stat should be set at 120
O
F for normal domestic hot water use; higher tem per a tures in crease
the risk of scalding. Do not set higher than 180
O
F. The differential con trol wheel on the L4006 control
(361E) should be set to 15
O
F. The high limit control (L4080B used on 361E and 541E) should be set
20
O
F or higher above the operating thermostat setting. The max i mum setting is 200
O
F.
Fill the heater with water, opening a hot water faucet to allow trapped air to escape. Check handholes for
tightness. Check the fuel supply and all fuel lines for tightness. Ro tate the blower wheel to loosen the
pump shaft seal. Bleed air from the oil line by opening the bleed valve on the fuel pump. Attach a small
plastic tube to the bleed valve fitting on pump and run to a gallon con tain er. Turn on the elec tric i ty and
set the ther mo stat so the burner mo tor runs. The heater will not ignite when the bleed valve is open. Bleed
the line until the oil is completely clear (not milky or opaque), trans par ent and free of air bubbles and froth.
Shut the bleed valve and the burner will ignite. Remove the plastic tube. To keep the burner control from
lock ing out while bleeding, attach a jumper between the flame detector terminals after starting the burn-
er (remove the jump er when done). Double-check control settings as described previously.
1.
Start the burner and verify draft at the breech is between -.02” W.C. and -.05” W.C.
2. Verify that the pump pressure matches the values in the chart.
3. Check the smoke and adjust the air to give #1 smoke.
4. Readjust to give a trace or zero smoke.
5. Check that the CO
2
level is at 11% or higher. Note: Do not attempt to adjust the burner without
instruments.
6. Open the air adjustment to lower the CO
2
by .5% or 1% to allow for draft and fuel variations (refer
to the burner manufacturer’s recommendations).
The thermostat has been adjusted to 120°F at the factory to reduce the risk of scald injury. Wait until
thermostat has shut off fuel to the main burner; wait 30 seconds following shut off of fuel, then set ther-
mostat to the highest temperature. The main burner should re-light. Set thermostat to the lowest tem-
perature; the main burner should go out. The thermostat should be adjusted in accordance with the
local codes or to the minimum setting that will meet the hot water needs of the consumer. Bock recom-
mends 120°F temperature settings for residential applications for safety as well as energy efficiency.
1.
Check the fuel supply, electrical wir ing and fuses. Make sure the tem per a ture control is set for heat.
2. If the motor runs but there is no flame, remove the electrode as sem bly, clean and readjust. Check
the electrode porcelain for cracks and replace if nec es sary. Check the trans form er to see if it is pro -
duc ing a strong spark. (Use extreme caution – the trans form er has a 10,000 volt out put.) Check that
the coupling between the motor and pump shaft is not slipping. Check the set screw on the blower
SET DRAFT AND
ADJUST BURNER
COMBUSTION
(see
burner instructions)
SERVICE:
PUTTING HEATER
INTO OPERATION
ELECTRIC WIRING
CONNECT TO
CHIMNEY
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