Maytag Amana PTC A Series Service Instructions Manual page 44

SERVICING
Calculating Procedure
1. Locate the outdoor temperature obtained in first column of
Total Power Consumption Cooling Chart.
2. Locate in second column the return air wet bulb tempera-
ture obtained in Step C.
3. The total watts input should come between minimum and
maximum values indicated for each model.
EXAMPLE: Assume that a PTH15 is again under test. Pro-
ceed as follows and observe test readings as simultaneously
as possible.
1. Outdoor dry bulb temperature reading - 95°F.
2. Check watts input - 1510.
3. Wet bulb temperature as described in Step C - 75°F.
In column headed Outdoor Dry Bulb Temperature of the Power
Consumption Chart find the 95°F value. Read to the right from
the 95°F value and find the room wet bulb temperature (75°F).
Read to the right front the 75°F W.B. value in the PTH15 col-
umn and note the minimum and maximum wattage of 1460 -
1575.
Since the wattage reading (1510) obtained in the test is within
the prescribed range, the total power input in watts is consid-
ered to be normal.
Electric Heat Test
For the electric heat test, the following readings must be re-
corded after the unit is interconnected with a wattmeter or by
recording the total amp draw to the unit.
NOTE: Cabinet front must be in place during this test.
• Record supply voltage to unit.
• Operate unit in highest heat setting.
• Record wattage recorded on wattmeter or total amp draw
to unit.
• Refer to heating watts/amps chart. (Whichever is appli-
cable for voltage rating on the unit being tested.)
• The total watts or amps recorded should fall within the
minimum and maximum watts/amps listed on these charts.
EXAMPLE: Assume that a PTH15 230/208V with 3.5 kW elec-
tric heater is under test.
1. Supply voltage as recorded - 208volts.
2. Watts recorded -2750W or Amps recorded - 13.5 Amps.
3. Locate the readings listed on the following pages. You will
note that these readings fall within the voltage, watts and
amp draw minimum and maximum ranges listed and there-
fore the unit heating performance would be considered nor-
mal.
44
Heating Power Consumption Test (Heat Pump Mode Only)
For the total power consumption test, the following readings
must be recorded after the unit is interconnected with a watt-
meter.
• Outside coil inlet air dry bulb temperature.
• Inside coil inlet air dry bulb temperature.
• Total watts input measured by wattmeter.
Calculating procedure
1. Locate temperature obtained in Step A in first column of
Heating Wattage Chart.
2. Locate in second column the inside coil inlet D.B. tem-
perature.
3. The total watts input should come between minimum and
maximum values indicated for each model.
EXAMPLE: Assume that a PTH15 is under test.
Proceed as follows and observe test readings as simultaneously
as possible.
1. Outside coil inlet D.B. temperature readings as described
in Step A: 45°F.
2. Check watts input: 1370 W.
3. Inside coil inlet D.B. temperature reading as described in
Step B: 75°F.
Read to the right from the 75°F inside coil inlet D.B. value in
the column and note the minimum and maximum wattage of
1335 - 1470.
Since the wattage reading (1370) obtained in the test is within
the prescribed range, the total power input in watts is consid-
ered to be normal.
See the charts on the following pages.