System information

15
COMPRESSOR
ACCUMULATOR
OUTDOOR COIL
INDOOR COIL
LCS
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater
®
Metering Device
Arrow indicates direction of flow
Metering
Position
Bypass
Position
HPS
Fig. 18 - Typical heat pump operation, heating mode
Fig. 19 - Typical heat pump operation, cooling mode
Outdoor coil
Indoor coil
Metering
position
Accumulator
Compressor
Bypass
position
AccuRater metering device
Arrow indictes direction of flow
Legend
HPS - High presure switch
LCS - Loss-of-charge switch
Table 4 - Wet coil air delivery (50JZ 024-048*)
50JZ Motor speed External static pressure, Pa
0 25 50 75 100 125 150 175 200 225 250
024 Low W 303 305 303 300 - - - - - - -
l/s 458 415 371 324 - - - - - - -
High W - - - - 435 428 428 422 - - -
l/s - - - - 455 393 358 319 - - -
030 Low W - 814 853 889 921 954 1002 - - - -
l/s - 561 526 491 458 426 393 - - - -
High W - - - - - - - 700 683 688 755
l/s - - - - - - - 577 539 508 499
036 Low W 552 540 529 523 514 480 - - - - -
l/s 612 584 551 518 486 449 - - - - -
High W - - - - - 782 765 736 721 780 1002
l/s - - - - - 693 660 624 584 550 536
048 Low W 692 686 678 664 652 664 736 - - - -
l/s 741 712 681 647 611 585 584 - - - -
High W - - 1112 930 856 834 825 811 793 - -
l/s - - 799 788 756 718 683 650 611 - -
* Air delivery values are based on operating voltage of 400 V, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drop to obtain static
pressure available for ducting.
Notes:
1 Do not operate the unit at a cooling air flow that is less than 165 l/s for each 3.5 kW of rated cooling capacity. Evaporator coil frosting may occur at air flows below this
point.
2. Dashes indicate portions of table that are beyond the fan motor capacity or are not recommended.
Outdoor coil
Indoor coil
Bypass
position
Accumulator
Compressor
Metering
position
HPS
LCS
AccuRater metering device
Arrow indictes direction of flow
Legend
HPS - High presure switch
LCS - Loss-of-charge switch