Continuous Fan; Electric Resistance Heating; Maintenance - Payne PA3Z Installation Instructions Manual

OD Temp.
52 54
(°F)
45 51 55
55 — —
65 — —
75 — —
85 — —
95 — —
105 — —
115
— —
125 — —
OD Temp.
361 370
(°C)
7 11 13
13 — —
18 — —
24 — —
29 — —
35 — —
41 — —
46 — —
52 — —
COOLING OPERATION (SIZES 048 AND 060)
These units utilize a 2 stage indoor thermostat. With a first stage
call for cooling (Y1), the indoor fan (low stage) energizes
immediately whereas the contactor energizes after a 5 minute time
delay (in case of an initial start- -up) starting the compressor (low
stage) and the outdoor fan motor. If the low stage operation cannot
satisfy the cooling demand, the second stage cooling (Y2)
energizes switching the compressor into high stage cooling through
energizing an internal solenoid valve inside the scroll compressor
and switching the indoor fan into high stage. When second stage
cooling is satisfied, Y2 de- -energizes switching the compressor and
the indoor fan into low stage cooling. When the low stage cooling
demand is met, Y1 de- -energizes shutting the compressor, indoor
fan and the outdoor fan.

CONTINUOUS FAN

With the continuous Indoor fan option selected on the thermostat,
G is continuously energized. In case of 024- -042 and 049 units, the
selected airflow setting is provided. In case of 048 and 060 units,
the system runs low stage (Y1) airflow for continuous fan
operation.

ELECTRIC RESISTANCE HEATING

If accessory electric heaters are installed, the thermostat energizes
W which energizes the heater relay and in turn energizes the
electric heaters. The IFR is energized which starts the indoor- -fan
motor. If the heaters are staged, W2 is energized when the second
stage of heating is required. When the need for heating is satisfied,
the heater and IFM are de- -energized.

MAINTENANCE

To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This cooling unit should be
inspected at least once each year by a qualified service person. To
troubleshoot unit, refer to Troubleshooting Chart in back of book.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
Table 6 – Cooling Charging Chart
SUCTION LINE TEMPERATURE (°F)
Suction Line Pressure (PSIG)
56 59 61 64
60 64 69 —
53 57 62 66
— — 53 57
— — — —
— — — —
— — — —
— — — —
— — — —
— — — —
SUCTION LINE TEMPERATURE (°C)
Suction Line Pressure (kPa)
40
387 423 442
5
15 18 21 —
12 14 16 19
— — 12 14
— — — —
— — — —
— — — —
— — — —
— — — —
— — — —
67 70 73 76
— — — —
70 — — —
62 66 71 75
— 56 61 66
— — 53 58
— — — 50
— — — —
— — — —
— — — —
462 482 502 523
— — — —
21 — — —
17 19 21 24
— 13 16 19
— — 12 14
— — — 10
— — — —
— — — —
— — — —
WARNING
!
PERSONAL INJURY
HAZARD
Failure to follow this warning could result in personal
injury or death and possible unit component damage.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills,
tools and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment,
other than those procedures recommended in the Owner's
Manual.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.
3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.
4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.
5. Ensure electric wires are not in contact with refrigerant
tubing or sharp metal edges.
17
79 82 85 89
— — — —
— — — —
— — — —
71 76 — —
63 67 72 —
54 58 62 66
50 53 57 60
49 52 55 58
— 50 53 56
544 566 589 612
— — — —
— — — —
— — — —
22 24 — —
17 20 22 —
12 14 17 19
10 12 14 16
9 11 13 14
— 10 11 13
AND UNIT DAMAGE
92
—
—
—
—
—
—
64
61
59
636
—
—
—
—
—
—
18
16
15