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Lennox CHA16-024, Service Manual

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Page 62

ECH16-15/20/25kW P VOLTAGE

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ECH16 15 / 25kW P VOLTAGE SEQUENCE OF OPERATION

NOTE - Call for heat is first stage heat for CHA16 units and second stage heat for CHP16/20 units.

 1- On a call for heat, relay K43 is energized. K43-1 closes

immediately.

 2- When K43-1 closes, heat relays K15, K16 and K17 are

energized. K15-1, K16-1 and K17-1 close immediately.

 3- When K43-2 closes, nothing happens as indoor blower

is already energized from first stage heat call.

 4- When K15-1 closes, 15kW: heating element HE1 is enĆ

ergized.

When K15-1 closes, 20kW or 25kW: heating element

HE1 and HE2 are energized.

 5- When K16-1 closes, 15kW: heating element HE2 is enĆ

ergized.

When K16-1 closes, 20kW or 25Kw: heating element

HE3 and HE4  are energized.

 6- When K17-1 closes, 15kW: heating element HE3 is enĆ

ergized.

When K17-1 closes, 20kW or 25kW: heating element

HE5 and HE6 are energized.

 7- When heating demand is satisfied, heat relay K43 is

de-energized. All heating elements de-energized imĆ

mediately.

Summary of Contents for CHA16-024

Page 1: ...kit Honeywell T7300 thermostat or Honeywell T8600 T8611 T8621 thermostat controls connect to the unit with jackĆplugs When plugged in the controls become an integral part of the unit wiring Low voltage thermostat connections facilitate thermostat field wiring Optional electric heat is field installed Electric heat operĆ ates in single or multiple stages depending on the kW size 5kW through 25 kW s...

Page 2: ... COOLING SYSTEM SERVICE CHECKS 43 VIII HEATING SYSTEM SERVICE CHECKS 44 IX INDOOR BLOWER OPERATION 44 X MAINTENANCE 45 XI ACCESSORIES 46 XII WIRING AND OPERATION SEQUENCE 52 CAUTION Electrostatic discharge can affect electronic components Take precautions during unit installation and service to protect the unit s elecĆ tronic controls Precautions will help to avoid control exposure to electrostati...

Page 3: ...4000 1890 3600 1700 Condenser Fan Motor horsepower W 1 6 124 1 4 187 Motor watts 230 220 340 330 Condensate drain size mpt in mm 3 4 19 No size of cleanable polyurethane filters in mm 1 16 x 25 x 1 406 x 635 x 25 1 20 x 25 x 1 508 x 635 x 25 Net weight of basic unit lbs kg 300 136 331 150 320 145 438 199 473 215 Shipping weight of basic unit lbs kg 1 package 385 175 413 187 407 185 547 248 582 264...

Page 4: ...il Tube diameter in mm No of rows 3 8 9 5 1 6 3 8 9 5 2 Fins per inch m 20 787 Diameter in mm No of blades 20 508 4 24 610 4 Outdoor Coil Air volume cfm L s 2350 1110 2200 1040 3600 1700 Coil Fan Motor horsepower W 1 6 124 1 4 187 Fan Motor watts 220 340 Condensate drain size mpt in mm 3 4 19 No size of cleanable polyurethane filters in mm 1 16 x 25 x 1 406 x 635 x 25 1 20 x 25 x 1 508 x 635 x 25 ...

Page 5: ...20 508 Ċ 4 24 610 Ċ 4 24 610 3 Outdoor Air Volume Ċ cfm L s 2350 1110 2200 1040 3600 1700 4000 1890 Outdoor Coil Fan Motor output Ċ hp W 1 6 124 1 4 187 1 3 249 Motor watts 220 340 430 Condensate drain size mpt Ċ in mm 3 4 19 No size of cleanable polyurethane filters in mm 1 16 x 25 x 1 406 x 635 x 25 1 20 x 25 x 1 508 x 635 x 25 Net weight of basic unit Ċ lbs kg 305 138 355 161 355 161 455 206 53...

Page 6: ... galvaĆ nized steel with prepunched mounting holes See Electric Heat Data Tables Unit Single Point Power Source Sub Fuse Box Ċ Installs internal to unit proĆ vides sub fusing to the unit used in conjunction with ECH16 or ECH16R for single point power source applications fuses furnished constructed of galvanized steel with prepunched mounting holes and electrical inlet and outlet holes hinged box c...

Page 7: ...ndoor 1 20 x 25 x 1 508 x 635 x 25 Outdoor 1 18 x 25 x 1 457 x 635 x 25 Economizer Dampers Horizontal Ċ Installs directly in cabinet combination outĆ door air and recirculated air damper formed gasketed damper blades nylon bearings 3 position or fully modulating 24v damper motor has adjustable miniĆ mum position switch electronic discharge air sensor adjustable outdoor air enĆ thalpy control 1 in ...

Page 8: ... lbs 9 kg Unit Stand Off Mounting Kit Ċ Elevates horizontal application units above mounting surface Includes six high impact polystyrene standĆoff mounts See dimension drawings 38H18 Indoor filter is not furnished with economizer REMD16 utilizes existing filter furnished with CHP20 unit ELECTRICAL DATA CHA16 Single Phase ModelĂNo CHA16Ć024 CHA16Ć030 CHA16Ć036 CHA16Ć048 CHA16Ć060 LineĂvoltageĂdata...

Page 9: ... 22 25 32 36 44 Compressors RatedĂloadĂamps 12 2 13 8 16 1 20 1 23 7 28 8 Compressors LockedĂrotorĂamps 61 0 73 0 88 0 104 0 129 0 169 0 Outdoor Coil FullĂloadĂamps 1 1 2 3 2 4 Outdoor Coil FanĂMotor LockedĂrotorĂamps 2 2 4 4 Indoor Coil Blower Motor FullĂloadĂampsĂ 2 1 3 0 3 9 4 6 Blower Motor 1 phase LockedĂrotorĂampsĂ 4 2 6 2 8 3 10 0 ReferĂtoĂNationalĂor Canadian ElectricalĂCodeĂmanualĂtoĂdete...

Page 10: ...ir volume by 7 All air data is measured external to the unit with dry coil and without air filter CHA16 030 BLOWER PERFORMANCE 230 VOLTS With Down Flow Air Openings External Static Air Volume at Various Blower Speeds External Static Pressure High MediumĆ High MediumĆ Low Low in w g Pa cfm L s cfm L s cfm L s cfm L s 0 0 1355 640 1255 590 1105 520 900 425 05 12 1345 635 1250 590 1100 520 910 430 10...

Page 11: ... data is measured external to the unit with dry coil and without air filter CHA16 036 BLOWER PERFORMANCE 460 575 VOLTS With Horizontal Air Openings External Static Air Volume at Various Blower Speeds External Static Pressure High Medium Low in w g Pa cfm L s cfm L s cfm L s 0 0 1710 805 1590 750 1105 520 05 12 1685 795 1565 740 1105 520 10 25 1655 780 1535 725 1105 520 15 37 1630 770 1510 715 1100...

Page 12: ...r volume by 7 All air data is meaĆ sured external to the unit with dry coil and without air filter CHA16 060 BLOWER PERFORMANCE 230 VOLTS With Horizontal Air Openings External Static Air Volume at Various Blower Speeds External Static Pressure High MediumĆ High Medium MediumĆ Low Low in w g Pa cfm L s cfm L s cfm L s cfm L s cfm L s 0 0 2850 1345 2530 1195 2255 1065 1970 930 1640 775 05 12 2820 13...

Page 13: ...derate air volume by 7 All air data is measured external to the unit with dry coil and without air filter CHP16 20Ć036 BLOWER PERFORMANCE 230 VOLTS With DownĆFlow Air Openings External Static Air Volume at Various Blower Speeds External Static Pressure High MediumĆ High MediumĆ Low Low in w g Pa cfm L s cfm L s cfm L s cfm L s 0 0 1360 640 1270 600 1070 505 890 420 05 12 1355 640 1250 590 1060 500...

Page 14: ...eration derate air volume by 7 All air data is measured external to the unit with dry coil and without air filter CHP20 042 CHP16 20Ć048 BLOWER PERFORMANCE 230 VOLTS With Horizontal Air Openings External Static Air Volume at Various Blower Speeds External Static Pressure High MediumĆ High MediumĆ Low Low in w g Pa cfm L s cfm L s cfm L s cfm L s 0 0 2075 980 1675 790 1445 680 1275 600 05 12 2060 9...

Page 15: ... 905 1740 820 1500 710 40 100 2390 1130 2100 990 1900 895 1710 805 1470 695 50 125 2320 1095 2060 970 1860 880 1670 790 1440 680 60 150 2240 1055 2010 950 1810 855 1630 770 1400 660 70 175 2160 1020 1950 920 1760 830 1580 745 1350 635 75 185 2120 1000 1920 905 1720 810 1560 735 1330 630 NOTE Ċ For 208v unit operation derate air volume by 7 All air data is measured external to the unit with dry coi...

Page 16: ...9 40 90 30 75 30 75 048 060 2000 945 73 182 50 124 36 90 36 90 060 2200 1040 95 236 63 157 44 109 44 109 WET INDOOR COIL AIR RESISTANCE CHA16 Model Number Air Volume Air Resistance Model Number cfm L s in w g Pa 600 285 0 05 12 CHA16 024 800 380 0 06 15 CHA16 024 1000 470 0 07 17 1200 565 0 08 20 800 380 0 09 22 CHA16 030 1000 470 0 10 25 CHA16 030 1200 565 0 11 27 800 380 0 09 22 CHA16 036 1000 4...

Page 17: ...L STRIP TB32 COMPRESSOR CONTACTOR K1 HARD START RELAY K31 CHA CHP16 024 030 TRANSFORMER T4 042 048 060 LATCH RELAY K6 CAPACITOR C1 CHP20 036 060 G J M VOLTS CHA CHP16 036 G J M VOLTS CAPACITOR C12 ALL P VOLT UNITS CAPACITOR C1 CHP16 20 048 G J M VOLTS CHP16 060 G J M VOLTS INBLOOR BLOWER CONTACTOR K3 DEFROST RELAY K4 OUTDOOR FAN RELAY K10 TRANSFER REALY K8 ALL Y VOLTAGE UNITS CAPACITOR C7 CHA CHP1...

Page 18: ...le contactors DANGER Single phase units use single pole contactors One leg of comĆ pressor capacitor and condensĆ er fan are connected to line voltĆ age at all times Remove all power to disconnect before servicing Electrical shock resulting in death or injury may result if power is not disconnected NOTE Contactor K1 is energized by the thermostat control system Depending on the control system inst...

Page 19: ...s are reset they remain in their normal position when power is removed CHP16 20 series units use a DPDT latch relay One set of normally open contacts is conĆ nected in series with thermostat Y1 and compressor contactor K1 while the matching normally closed contacts are connected in series with thermostat W1 and compressor contactor K1 The other set of normally open contacts is connected in series ...

Page 20: ... defrosts A jumper connects the pins to circuit board pin W1 Table 1 shows the timings of each pin The defrost interval can be field changed to 30 60 or 90 minutes The defrost period 14 minutes cannot be changed To change the interval between defrosts simĆ ply remove the jumper from the pin it is connected to and reconnect the jumper to one of the other available pins see figure 6 NEEDLE NOSE PLIE...

Page 21: ...ses allowing an internal path from OUT to COM to allow external defrost relay to energize and initiate defrost At the end of the defrost period the internal relay connected to terminal OUT opens to de energize the external defrost relay g RST Terminal Terminal RST resets the internal timer when power is reĆ moved and begins timer operation when power is returned Terminal RST is connected to termin...

Page 22: ...ÉÉÉ ÉÉ ÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ HOLD TIME THERMOSTAT DEMAND DEFROST THERMOSTAT DEFROST PRESSURE SWITCH DEFROST RELAY 30 60 90 MINUTES ÉÉÉÉÉÉÉÉÉ HOLD TIME 14 MINUTES PLUS HOLD TIME ÉÉ ÉÉ ÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉ ÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ B Cooling Components Figures 9 and 10 Figures 9 and 10 show CHP16 20 heat pump units CHP16 20 units will be equipped with reversing valve deĆ frost components ...

Page 23: ... SWITCH S6 OUTDOOR TXV VALVE REVERSING VALVE L1 RECIPROCATING COMPRESSOR B1 HIGH PRESSURE SWITCH S4 DEFROST PRESSURE SWITCH S46 DRIER CHP20 024 REVERSING VALVE L1 DEFROST PRESSURE SWITCH S6 DRIER HIGH PRESSURE SWITCH S4 DEFROST PRESSURE SWITCH S46 SCROLL COMPRESSOR B1 OUTDOOR TXV VALVE ...

Page 24: ...VERSING VALVE L1 DRIER OUTDOOR TXV VALVE DEFROST THERMOSTAT SWITCH S6 SCROLL COMPRESSOR B1 HIGH PRESSURE SWITCH S4 DEFROST PRESSURE SWITCH S46 OUTDOOR TXV VALVE REVERSING VALVE L1 DEFROST THERMOSTAT SWITCH S6 DRIER HIGH PRESSURE SWITCH S4 DEFROST PRESSURE SWITCH S46 SCROLL COMPRESSOR B1 INDOOR TXV VALVE ...

Page 25: ...as pocket becomes compressed figure 14 4 When compressed gas reaches the center it is discharged vertically into a chamber and discharge port in the top of the compressor figure11 The discharge pressure forcing down on the top scroll helps seal off the upper and lower edges tips of the scrolls figure 13 During a single orbit several pockets of gas are compressed simultaneously proĆ viding smooth c...

Page 26: ...mporariĆ ly disable the compressor until the coil warms sufficiently to melt any accumulated frost If S49 trips frequently due to coil icing check the unit charge air flow and filters before allowing unit back in operation Make sure to eliminate conditions which might promote ice build up 6 High Pressure Switch S4 High pressure switch S4 is standard on all CHP16 20 model units S4 is a manually res...

Page 27: ...ating operation and discharge head pressure drops below 195psi 10psi 11 Low Ambient Bypass Relay K58 Optional low ambient bypass relay K58 is a N O DPDT relay with a 24VAC coil K58 is wired in parallel with compressor reversing valve L1 When L1 is energized in the cooling cycle K58 is also energized opening K58 1 Therefore K58 1 is always closed during heating demand bypassing low ambient switch S...

Page 28: ...ole doubleĆbreak contactor used in commercial 20 and 25 kW threeĆphase ECH16 units K16 is equipped with a 24VAC coil which is enerĆ gized when time delay DL2 closes When K16 is enerĆ gized the second stage heating elements are enerĆ gized 5 Relay K17 Relay K17 is a singleĆpole singleĆthrow relay located on the control panel of all commercial singleĆphase ECH16 units 15 20 and 25 kW K17 is equipped...

Page 29: ...with each heating element When S15 trips some heating elements may remain operable In ECH16 commercial units only one S15 thermostat is used A single S15 thermostat is wired in series with pilot relay K43 When S15 trips all heating elements are deĆ energized 11 High Temperature Secondary S20 ECH16 commercial units use nonĆresettable thermoĆ stats for secondary high temperature protection One switc...

Page 30: ...PHASE 25 AMP 250V THREE 208 230V 3 PHASE 40 AMP 250V THREE ECH16 10 460V 20 AMP 600V THREE 575V 15 AMP 600V THREE 208 230V 35 AMP 250V TWO 208 230V 1 PHASE 60 AMP 250V TWO ECH16 15 208 230V 3 PHASE 60 AMP 250V THREE 460V 30 AMP 600V THREE 575V 25 AMP 600V THREE TABLE 3 ECH16 F3 RATING UNIT VOLTAGE RATING QUANTITY 208 230V 1 PHASE 45 AMP 250V SIX ECH16 20 208 230V 3 PHASE 40 AMP 250V SIX 460V 40 AM...

Page 31: ... 10 34H48 5 lbs 2 kg 230 50 9 2 34 100 ECH16R 26 65 10 34H24 53 240 53 10 0 34 100 55 208 68 11 3 38 600 71 ECH16R 15 34H48 220 72 12 6 43 000 75 ECH16R 15 34H48 18 lbs 8 kg 230 75 13 8 47 100 78 240 79 15 0 51 200 81 208 23 3 7 12 600 27 ECH16R 5 34H46 220 24 4 2 14 300 ECH16R 26 41 5 28 ECH16R 5 34H46 9 lbs 4 kg 230 25 4 6 15 700 ECH16R 26 41 5 34H26 29 240 26 5 0 17 100 30 208 32 5 3 18 100 36 ...

Page 32: ... 31H41 480 11 7 0 23 900 460v 31H18 13 CHA16 036 31H41 17 lbs 8 kg 550 8 5 8 19 800 ECH16Ć413 513 10 CHA16Ć036 17 lbs 8 kg 575 9 6 4 21 800 ECH16Ć413 513 575v 31H21 11 600 9 7 0 23 900 575v 31H21 11 208 26 7 5 25 600 30 220 28 8 4 28 700 ECH16Ć413 208 230v 32 ECH16Ć10 208 230 1 step 230 29 9 2 31 400 208 230v 31H15 33 ECH16 10 208 230v 31H32 1 step 3 phase 240 31 10 0 34 100 31H15 34 31H32 460v p ...

Page 33: ...460v 1 step 440 14 8 4 28 700 ECH16Ć413 513 16 CHA16Ć048 460v 31H37 575v 1 step 3 phase 460 15 9 2 31 400 ECH16Ć413 513 460v 31H21 17 31H37 575v 31H42 p 480 15 10 0 34 100 460v 31H21 18 31H42 17 lbs 8 kg 550 11 8 4 28 700 ECH16Ć413 513 14 17 lbs 8 kg 575 12 9 2 31 400 ECH16Ć413 513 575v 31H21 14 600 12 10 0 34 100 575v 31H21 15 208 40 11 3 38 600 44 220 42 12 6 43 000 ECH16Ć513 208 230v 47 ECH16Ć1...

Page 34: ...4 100 58L07 37 CHA16Ć060 31H32 460v 1 step 440 14 8 4 28 700 ECH16Ć513 653 18 CHA16Ć060 460v 31H37 575 1 step 3 phase 460 15 9 2 31 400 ECH16Ć513 653 460v 31H19 18 31H37 575v 31H42 3 phase 480 15 10 0 34 100 460v 31H19 19 31H42 17 lbs 8 kg 550 11 8 4 28 700 ECH16Ć653 15 17 lbs 8 kg 575 12 9 2 31 400 ECH16Ć653 575v 31H23 15 600 12 10 0 34 100 575v 31H23 16 208 40 11 3 38 600 ECH16 653 46 ECH16 15 2...

Page 35: ...ECH16R 52 ECH16RĆ7 31H47 220 34 5 9 20 100 ECH16RĆ 26 65 7 54 31H47 5 lbs 2 kg 230 35 6 4 21 900 26 65Ć7 31H25 56 CHP16Ć030 5 lbs 2 kg 1 step 240 37 7 0 23 900 31H25 ECH16Ć311 57 CHP16Ć030 ECH16R 10 1 step 1 phase 208 46 7 5 25 600 ECH16R ECH16 311 31H11 66 ECH16RĆ10 31H48 220 48 8 4 28 700 ECH16RĆ 26 65 10 69 31H48 5 lbs 2 kg 230 50 9 2 31 300 26 65Ć10 31H24 71 5 lbs 2 kg 240 53 10 0 34 100 31H24...

Page 36: ...9 kg 230 100 18 4 62 700 Ć Ć Ć Ć 134 19 lbs 9 kg 240 105 20 0 68 200 138 208 113 18 8 64 200 147 ECH16Ć25 31H29 220 120 21 0 71 700 153 31H29 19 lbs 9 kg 230 125 23 0 78 500 159 19 lbs 9 kg 240 131 25 0 85 300 164 208 32 5 3 18 000 70 ECH16RĆ7 31H47 220 34 5 9 20 000 ECH16RĆ 26 65 7 72 31H47 5 lbs 2 kg 230 35 6 4 22 000 26 65Ć7 31H25 74 5 lbs 2 kg 240 37 7 0 23 900 31H25 75 208 46 7 5 25 600 84 EC...

Page 37: ...ECH16Ć10 208 230v 31H32 3 phase 230 29 9 2 31 400 208 230v 31H15 49 208 230v 31H32 460v 240 31 10 0 34 100 50 CHP16Ć036 460v 31H37 20 lbs 9 kg 440 14 8 4 28 700 Ć Ć Ć Ć ECH16Ć413 24 CHP16Ć036 20 lbs 9 kg 460 15 9 2 31 300 Ć Ć Ć Ć ECH16Ć413 460v 31H18 25 480 15 10 0 34 100 31H18 25 208 40 11 3 38 500 59 ECH16 15 220 42 12 6 43 000 ECH16Ć413 208 230v 61 ECH16Ć15 208 230v 31H33 230 44 13 8 47 000 208...

Page 38: ... 31H35 460v p 240 76 25 0 85 300 98 460v 31H40 1 step 440 35 21 0 71 800 ECH16Ć413 513 46 31H40 22 lbs 10 kg 1 step 3 phase 460 36 22 9 78 300 ECH16Ć413 513 460v 31H21 47 g 3 phase 480 38 25 0 85 300 460v 31H21 49 208 19 5 3 17 900 45 ECH16Ć7 220 20 5 9 20 000 ECH16Ć653 46 ECH16Ć7 208 230v 31H31 230 21 6 4 21 900 ECH16Ć653 58L07 47 208 230v 31H31 460v 240 21 7 0 23 900 48 460v 31H36 440 10 5 8 20 ...

Page 39: ...67 31H48 5 lbs 2kg 230 50 9 2 31 300 26 65Ć10 31H24 69 g 240 53 10 0 34 100 71 208 68 11 3 38 400 87 ECH16Ć15 31H27 220 72 12 6 43 000 Ć Ć Ć Ć 91 31H27 18 lbs 8kg 230 75 13 8 47 000 Ć Ć Ć Ć 94 g 240 79 15 0 51 200 97 208 23 3 8 12 800 44 ECH16RĆ5 31H46 220 24 4 2 14 300 ECH16RĆ 26 41 5 46 31H46 4 lbs 2kg 230 25 4 6 15 700 26 41Ć5 31H26 47 g 240 26 5 0 17 100 48 208 32 5 3 17 900 53 ECH16RĆ7 31H47 ...

Page 40: ... Ć Ć Ć Ć ECH16Ć413 208 230v 45 ECH16 10 208 230v 31H32 3 phase 230 29 9 2 31 300 Ć Ć Ć Ć 208 230v 31H15 46 31H32 460v 240 31 10 0 34 100 31H15 48 CHP20Ć036 460v 31H37 440 14 8 4 28 700 ECH16Ć413 23 CHP20Ć036 3 phase 31H37 19 lbs 9kg 460 15 9 2 31 400 Ć Ć Ć Ć ECH16Ć413 460v 31H18 24 3 phase g 480 15 10 0 34 100 460v 31H18 25 208 40 11 3 38 500 ECH16 413 57 ECH16Ć15 208 230 220 42 12 6 43 000 Ć Ć Ć ...

Page 41: ...13 513 460v 31H21 23 480 11 7 0 23 900 460v 31H21 23 208 27 7 5 25 600 50 ECH16Ć10 220 28 8 4 28 700 Ć Ć Ć Ć ECH16Ć513 51 ECH16Ć10 208 230v 31H32 1 step 230 29 9 2 31 300 Ć Ć Ć Ć ECH16 513 31H16 52 31H32 460v 1 step 3 phase 240 31 10 0 34 100 54 460v 31H37 19 lb 9k 3 phase 440 14 8 4 28 600 ECH16Ć413 513 26 31H37 19 lbs 9kg 460 15 9 2 31 400 Ć Ć Ć Ć ECH16Ć413 513 460v 31H21 27 480 15 10 0 34 100 4...

Page 42: ... Ć Ć ECH16Ć653 460v 31H19 26 480 11 7 0 23 900 460v 31H19 26 208 27 7 5 25 600 55 ECH16Ć10 220 28 8 4 28 700 Ć Ć Ć Ć ECH16Ć653 57 ECH16Ć10 208 230v 31H32 1 step 230 29 9 2 31 400 Ć Ć Ć Ć ECH16 653 58L07 58 31H32 460v 1 step 3 phase 240 31 10 0 34 100 59 460v 31H37 19 lb 9k 3 phase 440 14 8 4 28 600 ECH16Ć653 29 31H37 19 lbs 9kg 460 15 9 2 31 300 Ć Ć Ć Ć ECH16Ć653 460v 31H19 30 480 15 10 0 34 100 4...

Page 43: ...re start up VII COOLING SYSTEM SERVICE CHECKS WARNING Refrigerant can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in personal injury or death The charge should be checked during startup using the method outlined below A Gauge Manifold Attachment Service gauge ports are identified in figure NO TAG Attach gauge manifold hig...

Page 44: ... outdoor coil Outdoor fan stops during this process B Heating Optional Electric Heat 1 When heat requirements exceed heat pump capacity the thermostat automatically activates the optional electric heat through W2 IX INDOORā BLOWER OPERATION ADJUSTMENT Unit is equipped with direct drive multi speed indoor blower See unit wiring diagram for factory setting Table 17 gives minimum blower speeds for CH...

Page 45: ...ter oil at oiling ports with a SAE 10W non detergent motor oil or suitable equivalent 3 Condenser Fan Motor Bearings Bearings are preĆ lubricated For extended bearing life lubricate each bearing through the oiling ports provided with a few drops of a good grade electric motor oil or SAE10 or SAE20 non detergent motor oil every two years B Filters Filters should be checked monthly or more frequentl...

Page 46: ...nstruction Manual for specific details regarding installation Refer to the sequence of operation flowcharts in back of this manual for detailed operation of the economizer The sequence of operation flowcharts also describe how the economizer interacts with the CHA CHP16 20 s and the control system being used 3 EMDH16 Horizontal Economizer EMDH16M Horizontal Economizer The EMDH16 and EMDH16M econom...

Page 47: ...tory installed in a REMD16 41 REMD16 65 is simĆ ilar Mixed air sensor should be removed from economizer and installed in unit blower compartĆ ment and sensing bulb should be installed in supply air stream as shown in figure 26 OUTDOOR AIR DAMPERS RETURN AIR DAMPERS MIXED AIR SENSOR NOTE Mixed air sensor is shown as it is factory installed in a REMD16M 41 REMD16M 65 is similar Mixed air senĆ sor sh...

Page 48: ... installed in supply air stream as shown in figure 26 OUTDOOR AIR DAMPERS RETURN AIR DAMPERS ENTHALPY SENSOR ENTHALPY SENSOR ACCESS COVER REMOVED OUTDOOR AIR DAMPERS RETURN AIR DAMPERS MIXED AIR SENSOR NOTE Mixed air sensor is shown as it is factory installed in a EMDH16M 41 EMDH16M 65 is similar Mixed air sensor should be removed from economizer and installed in supply air stream as shown in figu...

Page 49: ... senses total heat content in outside air temperature plus humidity and uses that information to control the amount of outside air brought into the system When the outside air enthalpy is below the control setpoint the control actuates a motor which in turn adjusts outdoor dampers to meet cooling deĆ mands of the building When the heat content rises above control setpoint the control de activates ...

Page 50: ...Kit includes a DPDT relay which is hard wired to the economizer harness MIXED AIR SENSOR CHP16 UNIT SENSOR HOLE LOCATION CONTROL HARNESS SUPPLY AIR FIGURE 26 12 Warm Up Kit An optional warm up kit may be added to either REMD16 or EMDH16 economizer except CHA CHP16 20 units using a Honeywell W7400 or T7300 Control System The Warm Up Kit holds the dampers closed during night setback and morning warm...

Page 51: ...ee figure 28 DIFFERENCE set by knob CUT IN POINT fixed minus CUT OUT POINT FIGURE 28 LOW AMBIENT ADJUSTMENT DETAIL ROTATE COUNTERCLOCKWISE FIXED STOP KNOB SECURING SCREW ADJUSTMENT KNOB LOW AMBIENT CONTROL SET INDICATOR AT 140 PSIG LOW AMBIENT ADJUSTMENT To find CUT OUT point re arrange the equation so that CUT OUT CUT IN minus the DIFFERENCE 2 Rotate the knob as needed to set the difference indic...

Page 52: ...Page 52 XII WIiring Diagrams and Operation Sequence CHP16 20 P VOLTAGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 7 ...

Page 53: ...ized When K6 2 switches terminals 6 8 open and 6 4 close compressor contactor K1 and de frost board CMC1 are energized 11 K1 1 closes to energize the compressor and condensĆ er fan CHP16 024 030 only As compressor gains speed compressor terminal S is powered by start capacitor C7 12 CHP16 024 030 only At compressor start up potential relay K31 is energized and start capacitor C7 is taken out of ci...

Page 54: ...Page 54 CHP16 20 Y VOLTAGE 1 2 3 4 5 6 7 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...

Page 55: ...Page 55 CHP16 20 G VOLTAGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...

Page 56: ... 2 switches terminals 6 8 open and 6 4 close compressor contactor K1 and de frost board CMC1 are energized 10 K1 1 closes to energize the compressor and condensĆ er fan 11 K3 2 switches to energize the blower on high speed K3 1 switches to power the economizer if equipped Dampers open to minimum position 12 Additional heating demand W2 is directed to optional electric heat not shown Defrost Mode 1...

Page 57: ...fan 4 K3 2 switches to energize blower on high speed K3 1 switches to power the economizer if equipped Dampers open to minimum posiĆ tion Heating 5 Heatingdemand initiates at W1 in the thermostat and passes through to ECH16 See Electric Heat Sequence of 0peration Units equipped with reciprocating compressors 6 As compressor gains speed compressor terminal S is powered by start capacitor C7 When co...

Page 58: ...d G in the thermostat Y1 energizes compressor contactor K1 and G energizes indoor blower relay K3 3 K1 1 closes to energize compressor and condenser fan 4 K3 2 switches to energize blower on high speed K3 1 switches to power the economizer if equipped Dampers open to minimum posiĆ tion Heating 5 Heatingdemand initiates at W1 in the thermostat and passes through to ECH16 See Electric Heat Sequence ...

Page 59: ...nd G in the thermostat Y1 energizes compressor contactor K1 and G energizes indoor blower relay K3 3 K1 1 closes to energize compressor and condenser fan 4 K3 2 switches to energize blower on high speed K3 1 switches to power the economizer if equipped Dampers open to minimum posiĆ tion Heating 5 Heatingdemand initiates at W1 in the thermostat and passes through to ECH16 See Electric Heat Sequence...

Page 60: ...r heat thermal heat relay K32 and resistor R6 are energized Within 1 110 seconds contacts K32 1 close followed by K32 2 2 When K32 1 closes nothing happens since indoor blower is already energized form first stage heat call 3 When K32 2 closes heating element HE1 is enerĆ gized 4 When heating demand is satisfied heat relay K32 is de energized Heating element HE1 de energizes imĆ mediately ...

Page 61: ...are energized Within 1 110 seconds contacts K32 1 and K33 1 close followed by K32 2 and K33 2 2 When either K32 1 or K33 1 closes nothing happens as indoor blower is aleady energized from first stage heat call 3 When K32 2 closes heating element HE1 is enerĆ gized 4 When K33 2 closes heating element HE2 is enerĆ gized 5 When heating demand stops heat relays K32 and K33 de energize Heating element ...

Page 62: ...ng happens as indoor blower is already energized from first stage heat call 4 When K15 1 closes 15kW heating element HE1 is enĆ ergized When K15 1 closes 20kW or 25kW heating element HE1 and HE2 are energized 5 When K16 1 closes 15kW heating element HE2 is enĆ ergized When K16 1 closes 20kW or 25Kw heating element HE3 and HE4 are energized 6 When K17 1 closes 15kW heating element HE3 is enĆ ergize...

Page 63: ... stage heat relay K43 is energized K43 1 closes immediately 2 When K43 1 closes heat relay K15 is energized K15 1 closes immediately 3 K43 2 closes but nothing happens as indoor blower is already energized from first stage heat call 4 When K15 1 closes heating elements HE1 HE2 and HE3 are energized 5 When heating demand is satified heat relay K43 is de energized All heating elements de energize im...

Page 64: ... is already energized from first stage heat call 3 When K15 1 closes heating elements HE1 HE2 and HE3 are energized HE1 HE2 and HE3 are connected in a delta configuration for three phase operation 4 After 30 second count time delay DL2 closes and enĆ ergizes heating contactor K16 K16 1 closes immediĆ ately 5 When K16 1 closes heating elements HE4 HE5 and HE6 are energized HE4 HE5 and HE6 are conne...

Page 65: ...en K43 1 closes heat relay K15 is energized K15 1 closes immediately 3 When K43 2 closes nothing happens as indoor blower is already energized from first stage heat call 4 When K15 1 closes 7 10 15kW heating elements HE1 HE2 and HE3 are energized HE1 HE2 and HE3 are connected in a wye configuration 20 25kW heatĆ ing elements HE4 HE5 and HE6 are energized HE4 HE5 and HE6 are configured in a wye con...

Page 66: ...Page 66 ELECTROMECHANICAL THERMOSTAT WITH ECONOMIZER 1 2 3 4 5 6 7 8 9 10 11 12 ...

Page 67: ...Cooling demand is routed through enthalpy control to energize internal relay 1S Internal contacts 1S1 close to complete a circuit through damper motor terminals T and T1 7 When 24 volts is applied across terminals T and T1 of damper motor the damper motor energizes and outdoor air dampers open Supply air sensor R1 varies the voltage across T and T1 and the outdoor air dampers open and adjust accor...

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