Yukon Eagle Klondike Eagle IV, Руководство пользователя

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1
checks and adJustMents
If you have installed your own furnace, we ask that you call for
an inspection by a Service Technician. The peace of mind and
assured performance are well worth the cost involved. A techni-
cian has the proper instruments to make the necessary checks
and adjustments.
furnace bloWer adJustMent
Set adjustable motor pulley so blower will give approximately 90º F
temperature rise through furnace. After pulley has been adjusted
check bolt as follows: (see Fig. 18)
The belt is drawn tight during shipment; therefore both belt tension
and sheave alignment must be rechecked by the installer when the
furnace is placed in service.
Improper belt tension and pulley misalignment are the major
causes of furnace fan noise and failure of belts and bearings.
Sheave alignment is easily determined with a straight edge held
across the outer face of the fan sheave. The face of the motor
sheave should also be parallel to the straight edge at all points.
Proper belt tension is more difficult to determine accurately. Too
little tension will permit slippage causing belt wear and may cause
noise or squealing when the motor starts. Excessive tension
increases motor load and may cause the oil film between shaft
and bearing to fail. This, in turn, causes the bearing to seize or
burn out.
The proper belt tension is the minimum which will drive the blower
without slippage. This varies with sheave diameter, fan size, and
motor starting torque characteristics. The practical belt tension can
best be determined by actual experience, but when in doubt it is
better to have the belt too loose rather than too tight. Belt tension
can be judged by grasping the belt as shown. The belt should
be deflected approximately one inch when moderate pressure is
applied.
air conditioning
See air circulating fan performance curve charts on page 21.
Service factors for factory furnished motors are 1/3 HP = 1 .35,
1/2 HP = 1.25, 3/4 HP = 1.15. All motors are Class A with Class
B insulation.
duct Work and bloWer sPeed adJustMent
Supply and return duct system should be sized properly for efficient
operation. Normal air temperature rise through the furnace should
be adjusted to approximately 90º F. Proper blower speed adjust-
ment, in conjunction with adequate duct work are necessary
to achieve this.
A high temperature rise will result in excessive fuel usage, due to
the high stack temperature that always accompanies a high air
temperature rise. It can also cause premature heat exchanger
failure.
To perform temperature rise check, start furnace and let it run a
minimum of 10 minutes (be sure all duct work is complete and
furnace is in its normal operating condition) .Place #1 thermom-
eter in the return near the furnace. Place #2 thermometer in the
supply duct near the furnace, but not in the plenum. After 10
minutes or more operation, take thermometer readings. Supply
air temperature should be no more than 90Q higher than return
air temperature.
Air temperature rise can be lowered by:
1. Increasing blower speed.
2. Additional supply or return outlets .
3. Lowering firing rate.
testing installations for efficiencY
iMPortant
Draft gauge must be used. Draft in smoke pipe must be set at
.03 Water Column updraft. Failure to set properly will cause fuel
to be wasted, heating will not be satisfactory, fast build-up of
creosote in heat exchanger and chimney may occur, and cause
damage to your heating system.
The draft regulator will afford the user maximum fuel efficiency,
however, the finest draft regulator in the world cannot increase the
efficiency of a heating system if the system as well as the regulator
is not in proper adjustment.
Many common tests are available to establish the efficiency of the
system. One such test is outlined on page 9.