ELECTRICAL
The appliance must be installed in accordance with current ANSI/NFPA 70 National Electrical Code, CSA C22.1 Canadian Electrical Code Part 1, and/or local codes.
The control system depends on correct polarity of power supply. Connect HOT wire (H) and NEUTRAL wire (N) as shown in Fig. 7.
→A separate line voltage supply MUST be used with a fused disconnect switch or HACR-type circuit breaker between main power panel and unit. (See Fig. 7.) Disconnecting means must be within sight from furnace.
WARNING: The unit cabinet must have an uninter- rupted or unbroken electrical ground to minimize per- sonal injury if an electrical fault should occur. A green ground screw is provided in control box for this connec- tion.
Use only copper wire for 115-v supply service to unit.
Metallic conduit (where required/used) may terminate at side panel of unit. It is not necessary to extend conduit inside unit from side panel to control box.
When replacing any original furnace wiring, use only 105°C No. 16 AWG copper wire.
Instructions for wiring thermostat (field supplied) are packed in thermostat box. Make thermostat connections as shown in Fig. 7 at 24-v terminal board on control box.
When installing optional accessories to this appliance, follow manufacturer's Installation Instructions included with accessory. Other than wiring for thermostat, wire with a minimum of type "T" insulation (63°F rise) must be used for accessories.
→Two 1/4-in. quick-connect terminals marked EAC and N5 are provided for electronic air cleaner (EAC) connection. (See Fig. 7.) These terminals are energized with 115v (0.5-amp maximum) during blower motor operation.
→Two 1/4-in. quick-connect terminals marked HUM and N6 are provided for 115-v humidifier connection. (See Fig. 7.) These terminals are energized with 115v (0.5-amp maximum) during any call for heat.
FILTERS
WARNING: Never operate unit without a filter or with filter access door removed. Failure to adhere to this warning could lead to a hazardous condition which could lead to equipment damage and bodily harm.
An internal filter is provided as standard equipment with furnace. Refer to Keeping Filters Clean section for filter cleaning informa- tion.
OPERATIONAL CHECKOUT
DO NOT START BURNER UNLESS BLOWER ACCESS DOOR IS SECURED IN PLACE.
Installation of furnace is now complete and operational checkout may be performed.
I.START-UP
1.Check wiring against wiring diagram shown in Fig. 7.
2.Open valve on oil supply line.
3.Reset primary control.
4.Set thermostat above room temperature.
5.Set main electrical switch to ON position. Burner should start.
DO NOT TAMPER WITH UNIT OR CONTROLSÐCALL YOUR SERVICE TECHNICIAN.
II.RECOMMENDED INSTALLATION PRACTICES AND COMBUSTION CHECK
In order to obtain optimum performance from oil burner, the following setup procedures must be followed:
1.A test kit (Bacharach No. 5022 kit or equivalent) to measure
smoke, stack draft, over-fire draft, CO2, and stack tempera- tures MUST be used in order to obtain proper air band setting. Although all of the above measurements are re- quired for optimum setup and efficiency data, the most important readings that must be taken are smoke number, over-fire draft, and stack draft.
2.The proper smoke number has been established by engi- neering tests to be between 0 and 1. This degree of smoke emission is commonly referred to as a "Trace" of smoke. It is recommended to use a Bacharach true spot smoke test set or equivalent.
3.In order to ensure proper draft through furnace, a baromet- ric draft regulator (supplied with furnace) must be installed as close to outlet of furnace as possible.
→In order for this device to function properly, barometric damper must be mounted with hinge pins horizontal and face of damper vertical. (See instructions included with damper.) The draft regulator should be adjusted after furnace has been firing for at least 10 minutes, and stack draft should be measured and set between -0.025 and -0.035 in. wc. The draft should be checked with a Bacharach MZF draft gage or equivalent.
4.The over-fire draft, which is taken through hole provided in observation door, is a measurement necessary to determine if there is a blockage between oil burner and flue outlet.
There should be a pressure drop of between 0.005 and 0.015 in. wc through furnace. This would set the range of the over-fire draft between -0.01 and -0.03 in. wc. A reading above -0.01 in. wc (for example +0.1 in. wc) would indicate that furnace is in an extremely high-pressure condition in primary section. This condition may be caused by excessive combustion air due to air band being too wide open or a lack of flue draft (chimney effect) or some other blockage, such as soot, in secondary section of heat exchanger.
5.The CO2 and stack temperature instruments enable you to obtain data required to determine thermal efficiency of furnace.
6.An oil filter should be installed as close to burner as possible with ALL oil burners and is essential on lower firing rate burners. We recommend the use of a low pressure drop oil filter such as the General Filter, Inc. model #1A-25A or equivalent. It is critical that oil capacity be equivalent or greater than fuel pump gear capacity. For a 2-pipe system, this is 25 gph.
7.The oil pressure regulator is factory set to give nozzle oil pressures of 100 psig. The firing rate noted on nameplate may be obtained with "standard" nozzles by adjusting pump pressure as noted in Table 4 or on label on furnace.
On a new installation, air entrapped in oil line leading from tank to nozzle must be thoroughly purged in order to prevent excessive after drip. The oil pump is provided with
aspecial fitting which allows purging of any air between tank and oil pump. The proper procedure for performing this operation is as follows:
a.Place a piece of clear plastic 1/4-in. diameter tubing over purge fitting on oil pump.
b.Start oil burner, then open purge fitting and allow burner to run until purge tube is completely free of air bubbles.
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