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Page 22

506238−01 06/09

MULTI−CONTACT (MC)

CONNECTORS (INCLUDED

WITH SOLAR MODULE)

USE PHOTOVOLTAIC (PV) WIR-

ING OR TWO WIRES WITH MC

CONNECTORS (FIELD PRO-

VIDED) CAT # 48W04

WEATHER PROOF JUNCTION

BOX (FIELD PROVIDED)

FIELD WIRING (FIELD PRO-

VIDED)

SOLAR MODULE GROUND

WIRE (FIELD PROVIDED)

FIELD WIRING (FIELD PROVIDED)

COMPLETE BOX AVAILABLE

AS CAT # 48W03

TO EARTH GROUND

PER NEC 690

SECTION V

RED

GRN

BLK

WHT

RED

BLK

GRN

SURGE
ARRESTOR

DC POSITIVE

TERMINAL ON

SWITCHED SIDE OF

DISCONNECT

DC RATED 15A

DISCONNECT IF

REQUIRED BY LOCAL

CODE /NEC (FIELD

PROVIDED

DC NEGATIVE

BUS BAR

GROUND FAULT IF
REQUIRED BY LOCAL
CODE / NEC (FIELD
PROVIDED)

WEATHERPROOF ELECTRICAL

ENCLOSURE

(FIELD PROVIDED)

GROUND BUS BAR

TO UNIT

FROM SOLAR

MODULE

SOLAR MODULE (FIELD PROVIDED)

REQUIREMENTS:

WATTAGE: 180−205W

PEAK POWER VOLTAGE: < 28 VDC

PEAK POWER CURRENT: < 8.5 A

OPEN CIRCUIT VOLTAGE: < 33.5 VDC

SHORT CIRCUIT CURRENT: < 8.5 A

LENNOX CATALOG

#48W00

CAT # 48W03

CONDUIT (FIELD PROVIDED)

WATERTIGHT
FLEXIBLE CONDUIT
(FIELD PROVIDED)

CONDUIT ELBOWS
(FIELD PROVIDED)

TERMINAL FOR
EARTH GROUND

XPG20 CONTROL BOX

PIPING MODULE

GROUND
LUG

CONTACTOR

WATERTIGHT

CONDUIT FITTING

WATERTIGHT

FLEXIBLE
CONDUIT

24VDC SOLAR

TERMINAL

BLOCK

ROUTE THROUGH

WIRE TIE

TO EARTH GROUND PER NEC

690 SECTION V

24VDC SOLAR TERMINAL BLOCK

NEGATIVE

TERMINALS

POSITIVE
TERMINALS

IMPORTANT

This should be the last

wiring connection made in the solar cir-

cuit. (DC disconnect must be OFF when connection
photovoltaic module to circuit. Never open electrical
connections or unplug connectors while the circuit is
under load.

IMPORTANT

The AC and DC grounding sys-

tems for a photovoltaic system, where both are
present, should tie to a common grounding elec-
trode or grounding system.

NOTE

Solar electric modules have no on/off switch. Modules can

be rendered inoperative only by removing them from light. (Fully
cover the front module surface with opaque material or wor

ing with

the module face down on a smooth, flat surface).

TO SOLAR DC

MOTOR

NOTE 1

Figure 17. Typical Solar Module Wiring Diagram

Содержание XPG20

Страница 1: ...Lennox Engineering Handbook Coils previously charged with HCFC 22 must be flushed INSTALLATION INSTRUCTIONS Dave Lennox Signature Collection XPG20 SunSourcet Comfort System SOLAR ASSIST HEAT PUMPS 50...

Страница 2: ...H VOLTAGE 37 940 SOLAR MODULE WIRING ELECTRICAL INLET CONTROL WIRING LOW VOLTAGE Field Supplied Components The followings items are field supplied not included Parts Lennox Catalog Numbers Solar Modul...

Страница 3: ...PANEL TERMINAL BLOCK BI FLOW FILTER DRIER FAN MOTOR SOLAR ASSIST DC MOTOR COUPLER HIGH PRESSURE SWITCH LOW PRESSURE SWITCH COMPRESSOR TERMINAL PLUG FAN MOTOR MOUNT Control Panel Parts Arrangement GROU...

Страница 4: ...use check thermal expansion valve CTXV refrigerant metering device Operating Gauge Set This instruction is intended as a general guide and do not supersede local codes in any way Consult authorities...

Страница 5: ...line service valves are used for removing refrigerant flushing leak testing evacuating checking charge and charging Each valve is equipped with a service port which has a factory installed valve stem...

Страница 6: ...lve S Compressor has internal vacuum protection that is designed to unload the scrolls compressor stops pumping when the pressure ratio meets a certain value or when the suction pressure is as high as...

Страница 7: ...perty not from the installation property Install the unit as far as possible from the property line S When possible do not install the unit directly outside a window Glass has a very high level of sou...

Страница 8: ...ay cause panels to be blown around and battered WARNING Unit must be grounded in accordance with national and local codes Electric Shock Hazard Can cause injury or death Line voltage is present at all...

Страница 9: ...when unit is raised above the factory height Elevated units could become unstable in gusty wind conditions Stabilizers may be used on factory height units when mounted on unstable an uneven surface ON...

Страница 10: ...d to the size of cooling unit Existing line set of proper size may be reused If system was previously HCFC 22 then lines must be flushed see Flushing the System on page If a Lennox RFC1 liquid line is...

Страница 11: ...s dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa CAUTION Brazing alloys and flux contain materi...

Страница 12: ...tem port connection on the liquid line service valve and out of the valve stem port connection on the suction service valve NOTE The fixed orifice or CTXV metering device at the indoor unit will allow...

Страница 13: ...ING INDOOR UNIT GAUGE MANIFOLD INVERTED HCFC 22 CYLINDER CONTAINS CLEAN HCFC 22 TO BE USED FOR FLUSHING LIQUID LINE SERVICE VALVE INLET DISCHARGE TANK RETURN CLOSED OPENED RECOVERY CYLINDER RECOVERY M...

Страница 14: ...provided Teflon rings around the stubbed end of the CTXV and lightly lubricate the connector threads and expose surface of the Teflon ring with refrigerant oil 3 Attach the stubbed end of the CTXV to...

Страница 15: ...sal of appliance Approved methods of recovery recycling or reclaiming must be followed WARNING Improper installation adjustment alteration service or maintenance can cause personal injury loss of life...

Страница 16: ...A into the line set and indoor unit Weigh in a trace amount of HFC 410A A trace amount is a maximum of two ounces 57 g refrigerant or three pounds 31 kPa pressure Close the valve on the HFC 410A cylin...

Страница 17: ...off the vacuum pump and closing the manifold gauge valves 6 When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to an upright cy...

Страница 18: ...th Unit must be grounded in accordance with national and local codes Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote...

Страница 19: ...uits A Run 24VAC control wires through hole with grommet B Make 24VAC thermostat wire connections NOTE Do not bundle any excess 24VAC control wires inside control box 4 ROUTE THERMOSTAT WIRES A B DEFR...

Страница 20: ...the DC motor applies a torque on the fan shaft and reduces the load of the AC motor The AC motor inverter control senses this reduction in load and realize that the AC motor does not have to work as...

Страница 21: ...s Solar module should be mounted according to manufacturer s recommendations Stainless Steel hardware nuts and bolts is recommended for longevity Two solar module mounting kits are available See Field...

Страница 22: ...W00 CAT 48W03 CONDUIT FIELD PROVIDED WATERTIGHT FLEXIBLE CONDUIT FIELD PROVIDED CONDUIT ELBOWS FIELD PROVIDED TERMINAL FOR EARTH GROUND XPG20 CONTROL BOX PIPING MODULE GROUND LUG CONTACTOR WATERTIGHT...

Страница 23: ...the power produced by the solar module The K227 Defrost relay switches the solar assist motor off when the heat pump is in defrost mode The relay has a 240VAC coil that is wired in parallel with the K...

Страница 24: ...gure 17 7 Set the thermostat for a cooling demand Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit 8 Recheck voltage while the unit is running Pow...

Страница 25: ...BULB DRY BULB WET BULB B TDrop 19 A Dry bulb Wet bulb F A 72 B 64 C 53 air flow air flow All temperatures are expressed in F 1 Determine the desired DT Measure entering air temperature using dry bulb...

Страница 26: ...ing amperage being drawn by the heat unit s Then apply the measurements taken in following formula to determine CFM CFM Amps x Volts x 3 41 1 08 x Temperature rise F CHARGING METHOD Use either WEIGH I...

Страница 27: ...ith Table 4 being sure to note any additional charge for line set and or match up 10 If subcooling value is greater than shown in Table 4 for the applicable unit remove refrigerant if less than shown...

Страница 28: ...0 4 4 329 89 50 10 344 109 1 Most popular match up pressures Indoor match up indoor air quality and indoor load cause pres sures to vary 2 Temperature of the air entering the outdoor coil 3 Liquid 10...

Страница 29: ...tdoor unit control circuit is isolated from power and field provided relays bypass the outdoor thermostats An amber indicating light simultaneously comes on to remind the homeowner that the unit is op...

Страница 30: ...d with 19 28VAC Table 8 LSOM System LED Troubleshooting Codes Status LED Condition Status LED Description Status LED Troubleshooting Information Red LED ON Thermostat demand signal Y1 is present but c...

Страница 31: ...s open and requires manual reset 5 Open circuit in compressor supply wiring or connections 6 Unusually long compressor protector reset time due to extreme ambient tempera ture 7 Compressor windings ar...

Страница 32: ...ond stage operationof the unit O 24VAC thermostat input for reversing valve operation Y1 24VAC thermostat input for first stage compressor operation P3 55 50 45 40 Five position square pin header If t...

Страница 33: ...close NOTE Individual HI PS and LO PS trips are totaled by the DCB S Up to four pressure switch trips are allowed in a single thermostat demand without locking out the DCB If the thermostat demand is...

Страница 34: ...r to the Demand Defrost Control Y1 Active Place a jumper on TEST pins for longer than one second but less than two seconds Clears any short cycle lockout and five strike fault lockout function if appl...

Страница 35: ...ure 14 illustrates the correct Y2 field wiring configuration NOTE The LSOM has a five second delay between Y2 being powered and the solenoid energizing If first stage compressor output is active in he...

Страница 36: ...ature conditions S Coil S Discharge Line S Ambient Air As the detected temperature changes the resistance across the sensor changes Figure 25 shows how the resistance varies as the temperature changes...

Страница 37: ...IL SENSOR 12 TUBES UP FROM BOTTOM 11 1 2 OUTSIDE ROW DISCHARGE LINE SENSOR DETAIL A DETAIL B Place ambient sensor and wire from DCB inside of plastic sleeve and route through gap between corner post a...

Страница 38: ...ll display the appropriate fault code Heating and cooling operation will be allowed in this fault condition 3 Discharge Line Sensor RT28 This sensor see mounting location in Figure 24 Detail C which c...

Страница 39: ...ult 1 Restricted air flow over indoor or out door coil 2 Improper refrigerant charge in sys tem 3 Improper metering device installed or incorrect operation of metering de vice 4 Incorrect or improper...

Страница 40: ...als should ever be used on the coated front glass No alkali based chemicals should be used including ammonia based solutions Always wear rubber gloves for electrical insulation when maintaining washin...

Страница 41: ...may vary somewhat from the description below its operation will be similar 1 Temperature Setting Levers Most heat pump thermostats have two temperature selector levers one for heating and one for coo...

Страница 42: ...ssor Discharge Line Higher Higher Indoor Return Air Same Same Indoor Coil Discharge Air Lower Higher Pressures Suction Vapor Lower Down Liquid Higher Higher NOTE Heat pump may have a low ambient contr...

Страница 43: ...apor Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature HEATING MODE Vapor Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temper...

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