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2. Place SYSTEM switch in COOL position and FAN switch in

AUTO position. Set control below room temperature. Observe

that cooling cycle shuts down when control setting is satisfied.

3. Place system switch in HEAT position. Set control above

room temperature. Observe that compressor, outdoor fan, and

indoor blower motors start. Observe that heating cycle shuts

down when control setting is satisfied.

4. When using an automatic changeover room thermostat, place

both SYSTEM and FAN switches in AUTO positions. Ob-

serve that unit operates in Cooling mode when temperature

control is set to ‘‘call for Cooling’’ (below room temperature),

and unit operates in Heating mode when temperature control

is set to "call for Heating" (above room temperature).

IMPORTANT: Three-phase, scroll compressors are direction ori-

ented. Unit must be checked to ensure proper compressor 3-phase

power lead orientation. If not corrected within 5 min., the internal

protector will shut off the compressor. The 3-phase power leads to

the unit must be reversed to correct rotation. When turning

backwards, scroll compressors emit elevated noise levels, and the

difference between compressor suction and discharge pressures

may be dramatically lower than normal.

CHECKING AND ADJUSTING REFRIGERANT CHARGE

— The refrigerant system is fully charged with R-22 refrigerant

and is tested and factory sealed.

NOTE: Adjustment of the refrigerant charge is not required

unless the unit is suspected of not having the proper R-22 charge.

Table 4A—Wet Coil Air Delivery

Unit 50JS 018-060 (Deduct 10% for 208v)*

UNIT MOTOR SPEED

EXTERNAL STATIC PRESSURE (IN. WG)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

018

Low

Watts - - - 214 191 170 -----

Cfm---821696575-----

Med

Watts -----------

Cfm-----------

High

Watts ----283274267----

Cfm----848707555----

024

Low

Watts - - 237 214 191 ------

Cfm--971821696------

Med

Watts ----368366365360---

Cfm----957872785688---

High

Watts -------425414--

Cfm-------891735--

Low

Watts 295 292 289 --------

Cfm928882802--------

Med

Watts 388 383 377 372 366 361 -----

Cfm 1203 1120 1062 1004 930 838 -----

High

Watts ----469458449442---

Cfm----1141 1027 924 828 - - -

Low

Watts 592 581 567 552 538 525 512 499 - - -

Cfm 1499 1421 1351 1281 1207 1125 1034 936 - - -

Med

Watts - - - 660 636 617 603 592 581 566 -

Cfm - - - 1475 1371 1274 1186 1105 1024 928 -

High

Watts -----776761744725706689

Cfm-----1452 1356 1254 1145 1030 910

Low

Watts 606 596 586 575 563 550 537 - - - -

Cfm 1464 1399 1341 1282 1218 1146 1066 - - - -

Med

Watts 680 665 649 635 622 611 600 590 - - -

Cfm 1608 1535 1461 1387 1316 1247 1180 1111 - - -

High

Watts 768 755 742 730 718 707 696 684 671 - -

Cfm 1656 1576 1508 1447 1390 1331 1268 1198 1119 - -

Low

Watts 741 724 709 690 664 631 594 562 543 552 -

Cfm 1994 1937 1869 1797 1722 1645 1566 1480 1384 1269 -

Med

Watts - - - 773 744 715 687 662 640 625 -

Cfm - - - 1957 1867 1787 1719 1653 1575 1463 -

High

Watts -----799782773756704-

Cfm-----1914 1842 1774 1686 1538 -

Low

Watts 742 723 698 666 629 591 559 540 - - -

Cfm 2197 2141 2103 2057 1988 1894 1783 1674 - - -

Med

Watts 838 822 803 780 752 721 689 661 639 632 -

Cfm 2485 2406 2269 2127 2012 1937 1894 1855 1770 1571 -

High

Watts - 934 913 891 866 837 806 776 750 735 -

Cfm - 2483 2391 2283 2170 2061 1960 1868 1780 1687 -

* Air delivery values are based on operating voltage of 230 v or 460 v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drops to obtain

static pressure available for ducting.

NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below

this point.

2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

3. Deduct 10% for 208v.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 27 28

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