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Lennox CBA27UHE-018 Скачать руководство пользователя страница 39

Page 39

G-ECB29‐25CB - 208/230V SINGLE PHASE - SEQUENCE OF OPERATION

FIRST STAGE HEAT

 1- When there is a call for heat, W1 of the thermostat ener­

gizes the electric heat relays K32 and K34 with 24VAC.

 2- When K32‐1 closes, the blower is energized on heat­

ing speed.

 3- When K32‐2 and K32-3 close, assuming the N.C.

primary (S15) and secondary (S20) limit switches
are closed, electric heat element HE1 is energized.

 4- When K34‐2 and K34-3 close, assuming the N.C.

primary (S15) and secondary (S20) limit switches
are closed, electric heat element HE2 is energized.

SECOND STAGE HEAT
(remove jumper between W2 and R)

 5- When K34‐1 closes, the unit is ready for a second stage

heat demand. W2 of the thermostat sends a second
stage heat demand, energizing the electric heat relays
K33 and K117 with 24VAC.

6-

When K33‐2, K33-3, K117-1 and K117-2 close, assuming
primary (S15) and secondary (S20) limit switches are
closed, electric heat elements HE3 and HE6 are ener­
gized.

THIRD STAGE HEAT
(remove jumper between W3 and R, if using third stage)

 7- When K33-1 closes, the unit is ready for a third stage

heat demand. W3, if available, of the thermostat sends
a third stage heat demand, energizing the electric heat
relays K35 and K116 with 24VAC.

8- When K35‐1, K35-2, K116-1 and K116-2 close, as­

suming the N.C. primary (S15) and secondary (S20)
limit switches are closed, electric heat elements
HE4 and HE5 are energized.

Содержание CBA27UHE-018

Страница 1: ...ations Page 32 The Elite CBA27UHE units are high efficiency blower coils featuring an all aluminum coil Several models are avail able in sizes ranging from 1 1 2 through 5 tons 5 3 through 17 6 kW The...

Страница 2: ...x 8 Blower motor output hp 1 2 1 2 1 2 1 2 1 Filters Size of filter in 20 x 20 x 1 20 x 20 x 1 20 x 20 x 1 20 x 20 x 1 Shipping Data 1 package lbs 137 137 150 150 ELECTRICAL DATA Voltage 1 phase 60hz...

Страница 3: ...r motor output hp 1 1 1 1 Filters Size of filter in 20 x 24 x 1 20 x 24 x 1 20 x 24 x 1 Shipping Data 1 package lbs 186 186 199 ELECTRICAL DATA Voltage 1 phase 60hz 208 230V 1ph 208 230V 1ph 208 230V...

Страница 4: ...3 584 142 750 186 905 248 80 365 110 358 108 521 147 702 194 864 256 CBA27UHE 030 BLOWER PERFORMANCE External Static Pressure in w g Air Volume and Motor Watts Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 cfm Watts...

Страница 5: ...53 50 1032 195 1374 315 1588 431 1660 465 1801 558 60 980 204 1336 331 1561 440 1618 472 1770 582 70 929 223 1295 339 1510 457 1593 493 1733 600 80 867 235 1227 363 1488 473 1552 508 1703 618 CBA27UHE...

Страница 6: ...UHE PARTS ARRANGEMENT FIGURE 1 CONTROL BOX ELECTRIC HEAT SECTION BLOWER COMPARTMENT COIL HORIZONTAL DRAIN PAN EXPANSION VALVE COMPLETE WITH SCREEN BLOWER ACCESS PANEL COIL ACCESS PANEL FILTER ACCESS P...

Страница 7: ...l Neutralize electro static charge by touching hand and all tools on an unpainted unit surface before performing any service procedure II UNIT COMPONENTS A Control Box See figure 2 for CBA27UHE contro...

Страница 8: ...its use a DPDT relay to energize the blow er motor during a call for electric heat only When the relay coil is energized on an electric heat call a set of N O contacts closes to energize the blower mo...

Страница 9: ...at Components ECB29 parts arrangement is shown in figures 5 through 10 All electric heat sections consist of components mounted to the electric heat vestibule panel and electric heating elements ex po...

Страница 10: ...Single phase electric heat uses two pole terminal strips while three phase electric heat uses three pole terminal strips Heating Elements HE1 through HE6 Heating elements are composed of helix wound...

Страница 11: ...Page 11 FIGURE 6 ECB29 8 8CB 9CB 10 10CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 12: ...Page 12 FIGURE 7 ECB29 12 5CB 15CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 13: ...Page 13 FIGURE 8 ECB29 8 10 208 230 THREE PHASE ECB29 15CB 208 230 THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 14: ...Page 14 FIGURE 9 ECB29 20CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 15: ...Page 15 FIGURE 10 ECB29 25CB 30CB 208 230 SINGLE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 16: ...Page 16 FIGURE 11 ECB29 20CB 25CB 208 230 THREE PHASE ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT...

Страница 17: ...0 20 500 4 1 36 4 40 8 kW 5 lbs ECB29 8 12L50 Terminal Block ECB29 8CB 12L52 45A Circuit breaker 1 208 6 0 20 500 4 1 41 45 220 6 7 22 900 4 1 47 4 50 230 7 3 25 100 4 1 47 4 50 240 8 0 27 300 4 1 47...

Страница 18: ...12L52 45A Circuit breaker 1 208 6 0 20 500 4 1 41 45 220 6 7 22 900 4 1 47 4 50 230 7 3 25 100 4 1 47 4 50 240 8 0 27 300 4 1 47 4 50 9 kW 5 lbs ECB29 9CB 13T79 60A Circuit breaker 2 208 6 8 23 100 4...

Страница 19: ...700 4 1 57 60 230 9 2 31 400 4 1 57 60 240 10 0 34 100 4 1 57 60 12 5 kW 10 lbs ECB29 12 5CB 13T88 1 25A Circuit breaker 1 50A Circuit breaker 2 208 9 4 32 000 4 1 24 38 25 4 40 62 70 220 10 5 35 800...

Страница 20: ...erminal Block ECB29 10CB 13T87 60A Circuit breaker 2 208 7 5 25 600 4 1 50 4 50 220 8 4 28 700 4 1 57 60 230 9 2 31 400 4 1 57 60 240 10 0 34 100 4 1 57 60 12 5 kW 10 lbs ECB29 12 5CB 13T88 1 25A Circ...

Страница 21: ...208 11 3 38 400 4 1 44 4 45 220 12 6 43 000 4 1 50 50 230 13 5 47 000 4 1 50 50 240 15 0 51 200 4 1 50 50 ECB29 15 28K48 3 25A Fuses 1 440 12 6 43 000 2 1 23 25 460 13 5 47 000 2 1 24 25 480 15 0 51 2...

Страница 22: ...kW 10 lbs ECB29 12 5CB 13T88 1 25A Circuit breaker and 1 50A Circuit breaker 2 208 9 4 32 000 7 6 28 38 4 30 4 40 66 80 220 10 5 35 800 7 6 31 43 4 35 4 45 75 80 230 11 5 39 200 7 6 31 43 4 35 4 45 75...

Страница 23: ...30 62 70 220 16 8 57 300 7 6 40 30 4 40 4 30 70 70 230 18 4 62 700 7 6 40 30 4 40 4 30 70 70 240 20 0 68 200 7 6 40 30 4 40 4 30 70 70 ECB29 20 28K49 3 35A Fuses 1 440 16 8 57 300 460 18 4 62 700 480...

Страница 24: ...50A Circuit breaker 2 208 9 4 32 000 7 6 28 38 4 30 4 40 66 80 220 10 5 35 800 7 6 31 43 4 35 4 45 75 80 230 11 5 39 200 7 6 31 43 4 35 4 45 75 80 240 12 5 42 600 7 6 31 43 4 35 4 45 75 80 15 kW 12 l...

Страница 25: ...0 30 4 40 4 30 70 70 230 18 4 62 700 7 6 40 30 4 40 4 30 70 70 240 20 0 68 200 7 6 40 30 4 40 4 30 70 70 ECB29 20 28K49 3 35A Fuses 1 440 16 8 57 300 4 0 33 35 460 18 4 62 700 4 0 34 35 480 20 0 68 20...

Страница 26: ...0A Circuit breaker 2 208 9 4 32 000 7 6 28 38 4 30 4 40 66 70 220 10 5 35 800 7 6 31 43 4 35 4 45 75 80 230 11 5 39 200 7 6 31 43 4 35 4 45 75 80 240 12 5 42 600 7 6 31 43 4 35 4 45 75 80 15 kW 12 lbs...

Страница 27: ...40 30 4 40 4 30 70 70 230 18 4 62 700 7 6 40 30 4 40 4 30 70 70 240 20 0 68 200 7 6 40 30 4 40 4 30 70 70 ECB29 20 28K49 3 35A Fuses 1 440 16 8 57 300 4 0 33 35 460 18 4 62 700 4 0 34 35 480 20 0 68 2...

Страница 28: ...wer operation is dependent on thermostat con trol system 2 Generally blower operation is set at thermostat sub base fan switch With fan switch in ON position blower operates continuously With fan swit...

Страница 29: ...sive buildup salt WARNING Disconnect power before performing any maintenance At the beginning of each heating cooling season the sys tem should be checked as follows A Filters IMPORTANT Filter access...

Страница 30: ...signal of 24VAC on these taps Instead of energizing a motor speed winding on a PSC motor for each demand heat cool constant fan the communication voltage directs the motor to operate at the torque val...

Страница 31: ...o these motors There are two inputs needed to operate this motor a high voltage con stant power source and the low voltage communication that selects the torque value in each tap per demand Checking 2...

Страница 32: ...ric heat section 4 Blower motor B3 is energized on heating speed after K20 1 closes 5 Economizer if used is energized SINGLE STAGE COOLING Y1 to Y2 jumper in place 6 When there is a call for cooling Y...

Страница 33: ...Page 33 460V Single Phase...

Страница 34: ...1 When there is a call for heat W1 of the thermostat ener gizes the electric heat relay K35 with 24VAC 2 When K35 1 closes the blower is energized on heat ing speed 3 Assuming the N C primary S15 and...

Страница 35: ...24VAC 2 When K32 1 closes the blower is energized on heat ing speed 3 When K32 2 and K32 3 close assuming N C prima ry S15 and the secondary S20 limit switches are closed electric heat element HE1 is...

Страница 36: ...se and assuming the N C primary S15 and secondary S20 limit switches are closed elec tric heat element HE1 is energized SECOND STAGE HEAT remove jumper between W2 and R 4 When K33 1 closes the unit is...

Страница 37: ...osed electric heat element HE1 is energized SECOND STAGE HEAT remove jumper between W2 and R 4 When K33 1 closes the unit is ready for a second stage heat demand When K33 2 and K33 3 close assuming th...

Страница 38: ...and K32 3 close assuming the N C pri mary S15 and secondary S20 limit switches are closed electric heat element HE2 is energized SECOND STAGE HEAT remove jumper between W2 and R 5 W2 of the thermosta...

Страница 39: ...W2 and R 5 When K34 1 closes the unit is ready for a second stage heat demand W2 of the thermostat sends a second stage heat demand energizing the electric heat relays K33 and K117 with 24VAC 6 When K...

Страница 40: ...t W1 of the thermostat energizes the electric heat contactor K1 2 When K1 contacts M1 and M2 close the blower is ener gized on heating speed 3 When K1 contactor closes assuming the N C primary S15 and...

Страница 41: ...he thermostat energizes the electric heat contactor K1 2 When K1 contacts M1 and M2 close the blower is ener gized on heating speed 3 When K1 contactor closes assuming the N C primary S15 and secondar...

Страница 42: ...ary S15 and secondary S20 limit switches are closed electric heat elements HE1 HE2 and HE3 are energized SECOND STAGE HEAT remove jumper between W2 and R 4 W2 of the thermostat sends a second stage he...

Страница 43: ...C primary S15 and secondary S20 limit switches are closed electric heat element HE3 is energized SECOND STAGE HEAT remove jumper between W2 and R 5 When K34 2 closes the unit is ready for a second st...

Страница 44: ...s to the Y1 ter minal on the coil blower The Y1 demand will be isolated from the cooling tap speed on the indoor blower motor by removal of the jumper between Y1 and Y2 on the indoor unit s terminal s...

Страница 45: ...ISE NOT USED PINS 4 8 12 NOT USED CONNECT FOR 0 50 0 80 IN W G ONLY OTHERWISE NOT USED Y1 Y2 JUMPER IN FOR SINGLE STAGE REMOVED FOR TWO STAGE K183 DEHUMIDIFICATION RELAY AND WIRING HARNESS 0 10 0 49 I...

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