INTRODUCTION
The model 58VLR Furnaces are available in 2 sizes. Each size can
be fired at 3 different rates by a simple nozzle change. Unit
58VLR105 covers input ranges from 70,000 to 105,000 Btuh. Unit
58VLR120 covers input ranges from 119,000 to 154,000 Btuh.
This furnace is a Low-Boy unit. It may be operated only in the
upflow configuration.
The furnace is shipped as a packaged unit, complete with burner
and controls. It requires a line voltage (115 vac) connection to
control box, a thermostat hook-up as shown on wiring diagram, oil
line connection(s), adequate duct work, and connection to a
properly sized vent.
The air handling capacity of this furnace is designed for cooling
airflow. Refer to Table 13 or 14 for expected airflows at various
external duct static pressures.
LOCATION
Step 1—General
ELECTRICAL SHOCK, FIRE OR UNIT DAMAGE
HAZARD
Failure to follow this warning could result in property damage
or personal injury or death.
This furnace is not water tight and is not designed for outdoor
installation. This furnace shall be installed in such a manner
as to protect electrical components from water. Outdoor
installation would lead to a hazardous electrical condition and
to premature furnace failure.
UNIT DAMAGE HAZARD
This oil furnace may be used for construction heat provided
that:
-The furnace operating conditions, including ignition, input
rate, temperature rise and venting, are verified per instruc-
tions in this manual.
-The furnace is permanently installed with all electrical
wiring, piping, venting and ducting installed according to
these installation instructions. A return air duct is provided,
sealed to the furnace casing, and terminated outside the space
containing the furnace. This prevents a negative pressure
condition as created by the circulating air blower, causing a
flame rollout and/or drawing combustion products into the
structure.
-The furnace is controlled by a thermostat. It may not be
″
hot
wired
″
to provide heat continuously to the structure without
thermostatic control.
-Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
-The temperature of the return air to the furnace is no less
than 55°F, with no evening setback or shutdown. The use of
the furnace while the structure is under construction is
deemed to be intermittent operation per our installation
instructions.
-The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the
nameplate value.
-The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
-The furnace, ductwork and filters are cleaned as necessary to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
This furnace is approved for reduced clearances to combustible
construction, therefore, it may be installed in a closet or similar
enclosure. It may be located in a basement or on the same level as
area to be heated. In any case, unit should always be installed level.
The required minimum clearances for this furnace are specified in
Table 1.
Fig. 3—Return-Air Temperature
A04036
60
80
Table 1—Minimum Clearances to Combustible
Materials (In.)
UNIT APPLICATION
LOW-BOY
Sides
Furnace
1
Supply Plenum and Warm-Air Duct within 6 ft
of Furnace
1
Back
Service Clearance
19
Top
Furnace Casing or Plenum
2
Horizontal Warm-Air Duct Within 6 ft
of Furnace
2
Bottom*
0
Flue Pipe
Horizontally or Below Pipe
4
Vertically Above Pipe
9
Front
8
*Floor may be combustible
NOTE: Adequate service clearance should be provided over and above these
dimensions as required.
3
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