Lennox International Inc O23V-105 O23V Installation Clearances Inches mm, Top of plenum & duct

ACAUTION

A CAUTION

Installation of Lennox oil-fired furnaces must conform with the National Fire Protection Association Standard

for the Installation of Oil Burning Equipment, NFPA No. 31, the National Electrical Code, ANSI/NFPA No.70 (in the U.S.A.), CSA Standard CAN/CSA-B139 (in Canada), Installation Code for Oil Burning Equip- ment, the Canadian Electrical Code Part1, CSA 22.1 (Canada), the recommendations of the National Envi- ronmental Systems Contractors Association and any state or provincial laws or local ordinances. Authorities having jurisdiction should be consulted before installa- tion. Such applicable regulations or requirements take precedence over general instructions in this manual. Chimneys and chimney connectors must be of the

type and construction outlined in section 160 of NFPA No. 31.

Air for combustion and ventilation must conform to standards outlined in section 140 of NFPA No. 31 or, in Canada, CSA Standard B139. When installing O23V units in confined spaces such as utility rooms, two combustion air openings are required. Dimen- sions of combustion air openings are shown in table 1. One opening shall be below burner level and the other opening shall be no more than 6"(152 mm) from the room'sceiling.

The combustion air opening should provide a mini-

mum free area one-half square inch per 1,000 Btu per hour input. This combustion air should be brought into the area containing the furnace below the level of the furnace burner.

Table	2
O23V Installation	Clearances
Clearances	inches (mm)
top of plenum & duct	2	(51)
plenum sides	3	(76)
sides	0 (0)
rear	0 (0)
front	4 (120)
flue pipe	6 (152)

With the HEAT	selector pin in the position shown in the
wiring diagram	(on	page 16), the	unit must operate at
a temperature	rise	in the range	listed in table 7 (on
page 17).

•When installed, furnace must be electrically grounded in accordance with local codes or, in the absence of lo-

cal codes, with the current National Electric Code,

ANSI/NFPA No. 70, or Canadian Electric Code (CEC) if an external electrical source is utilized.

•Field wiring connections with the unit must meet or ex- ceed specifications of type T wire and must withstand a 63'_F(17'_C)temperature rise.

•If installing a programmable thermostat, use a type which retains its memory in event of a power loss.

•When the furnace is used in conjunction with cooling units, it shall be installed in parallel with, or on the up- stream side of, cooling units to avoid condensation in the heating element. With a parallel flow arrangement, a damper (or other means to control the flow d air) shall be adequate to prevent chilled air from entering the fur- nace and, if manually operated, must be equipped with means to prevent operation of either unit, unless damper is in the full "heat" or "cool" position.

Xk WARNING

Combustion

Model No.

O23V-70/90/105/120 O23V-140/154

Table 1

Air Opening Dimensions (2 openings required)

10" X 20" (254 mm X 508 mm) 11" X 22" (279 mm X 559 mm)

This unit is approved for use on combustible flooring and for clearances to combustible material as listed on

unit rating plate and in table 2. Unit service and acces-

sibility clearances take precedence over fire protec- tion clearances.

AIMPORTANT

Set the unit in desired location keeping in mind the clear- ances listed in table 2. Also keep in mind oil supply connec- tions, electrical supply, flue connections and sufficient clear- ance for installing and servicing unit.

Level the unit from side to side and from front to rear. If the furnace is not level, place fireproof wedges or shims be- tween the low side of the furnace and the floor. Make sure the weight of the furnace is distributed evenly on all four corners. Strain on sides of cabinet causing cracking and popping noises may occur if weight of furnace is not evenly distributed.

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