5
13) COMBUSTION PRIMARY CONTROL
(ON BURNER
)
The purpose of this control is to sequence the
operation of the burner. The first function is to close
the burner circuit and the ignition transformer circuit
when the aquastat calls for heat and also to open the
burner circuit when the water temperature is attained.
The second function is to shut-off the oil burner in the
case of lack of ignition, oil, flame, proper voltage or
due to burner malfunction.
14) WIRING
Connect BX harness from aquastat to the side of the
burner relay junction box. Wire oil burner and controls
according to the attached wiring diagram. The field
supplied wiring should be connected to the top of the
aquastat on models CM-32, CMO32 and CMO50.
15) INSTALLING THE OIL BURNER
The nozzle is installed on the burner. Make sure to
adjust the nozzle and electrode (see Table 1. p. 8).
Mount burner on water heater and use the gasket
supplied, between burner mounting flange and the
water heater.
16) NOZZLE
DATA
Refer to the Technical Specifications at the end of this
manual (Table 1, p. 8).
17) FUEL OIL PUMP
The fuel oil pump is developed for pressure atomizing
type oil burner service and has a built-in pressure
regulating valve and oil filter. Connections are
provided for both, a one pipe system and a two pipe
system. Pump pressure is adjusted to 100 PSI,
gauged at the factory. This is the proper working
pressure and should be checked with a suitable gauge
at the spot indicated on the pump.
18) OIL TANK AND PIPING
The oil tank must be installed on a suitable base in
order to prevent settling and the foundation must be of
non-flammable material. A manual shut-off valve and
an oil filter must be installed in the oil supply line
located at the outlet of the oil tank. Use properly sized
oil supply lines for installation. Consult the latest
C.S.A. code and supplements for installation of oil
burning equipment. An oil return line must be used on
an installation where the oil level of the tank is below
the burner. This return line must be the same size as
the suction line.
At the beginning of every heating season have a
qualified service technician check the entire oil
distribution system for leaks.
19) VENTILATION
AND
COMBUSTION AIR
Normally, infiltration of air into the home is adequate to
provide the necessary volume of air for combustion
and ventilation. When a unit is installed in a room
under high negative pressure conditions, provisions
should be made for an outside source of combustion
air. If the unit is located in an enclosed area, two
openings are required, one near the floor and the
other near the ceiling. Each opening should have a
minimum area of one square inch per 1,000 BTU/h,
free of any obstruction. In the case of an outside wall,
only one opening is required. This opening must be
protected by a louver to prevent snow or rain
penetration. A minimum area of one square inch per
5,000 BTU/h is required and must be free of any
obstruction.
20) FUEL
OIL
WARNING
Do not use gasoline, crankcase drainings or
any oil containing gasoline.
The fuel oil should not be heavier than No. 2 furnace
oil.
21) INITIAL
START-UP
1. Turn-off the electric switch, which controls the
water heater (see that proper fuses are installed,
max: 15 amps).
2. Fill the water heater (leave inlet water valve open).
3. Carefully check for water leaks.
4. Open manual shut-off valve from oil tank to
burner.
5. Adjust the combustion air band or set the damper
to a quarter open position.
6. Press the reset button on the combustion safety
relay
ONCE ONLY
(relay is mounted on burner).
7. Turn the switch to "ON" (burner should start).
8. Purge the oil line through the valve located near
the pump (refer to the instructions enclosed with
the burner).
9. Carefully check for oil leaks.
22) ADJUSTMENTS
1. Adjust the draft regulator to obtain a minimum of
-0.02” W.C. The reading must be taken between
the water heater flue outlet and the draft regulator.
2. Adjust the combustion air band to produce a No. 1
smoke spot maximum on the Bacharach scale.
The reading must be taken only when the
combustion chamber is hot and the observation
door is closed.
3. Set the operating and the Limit Control as
previously specified.
