User guide

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Number One

Ai'rConditbninq

Maker

Divisiun uf

Carrier Corporation

Carrier Parkway • Syracuse NY 13221

Weathermaster III Heat Pump

(Outdoor Coil Section; Indoor Compressor Section)

INDEX

Page

SAFETY CONSIDERATIONS...............................1

INSTALLATION

...................................................

1-8

Step 1 — Check Equipment and

Jobsite...............................................I

• UNPACKAGE UNITS

• INSPECT EQUIPMENT

• COMPLETE OR CONSIDER SYSTEM

REQUIREMENTS

Step 2 — Mount Outdoor Coil Unit

....................

• ON THE GROUND: MOUNT OUTDOOR

COIL ON A SOLID, LEVEL CON

CRETE PAD

• ON THE ROOF: MOUNT OUTDOOR

COIL ON A LEVEL PLATFORM

OR FRAME

Step3 — Mount Indoor Compressor

Section

.............................................

Step 4 — Make Piping Connections

..................

• REPLACE THE ACCURATER™ RE

FRIGERANT CONTROL PISTON IN

THE INDOOR COIL AS REQUIRED

• CONNECT REFRIGERANT LINES

Step 5 — Make Electrical Connections .. 7

• INSTALL A BRANCH CIRCUIT

DISCONNECT PER NEC

• BRING LINE POWER LEADS INTO

COMPRESSOR SECTION

• CONNECT GROUND LEADS AND i

POWER WIRING

• CONNECT POWER LEADS FROM

INDOOR COMPRESSOR SECTION

TO OUTDOOR COIL

• SEE INDOOR FAN COIL AND

ELECTRIC HEATER INSTALLATION,

START-UP AND SERVICE

INSTRUCTIONS

• CONNECT CONTROL POWER

WIRING

START-UP

...........................................................

8, 9

SERVICE............................................................10-17

MAINTENANCE ................................................. 17

SAFETY CONSIDERATIONS

Installation and servicing of air conditioning

equipment can be hazardous due to system pressure

and electrical components. Only trained and quali

fied service personnel should install, repair or

service air conditioning equipment.

Untrained personnel can perform basic mainten

ance functions of cleaning coils and filters and

replacing filters. All other operations should be

performed by trained service personnel. When

working on air conditioning equipment, observe

precautions in the literature, tags and labels

attached to the unit and other safety precautions

that may apply.

Follow all safety codes. Wear safety glasses and

work gloves. Use quenching cloth for brazing and

unbrazing operations. Have fire extinguisher avail

able for all brazing operations.

WARiNIMG: Before peri'orBEiisg: service or

laaintenaac« operadotis os. mtHL tiina oif rtsian

pow«f switch to ctait, T om OB' accessosy heater

power iwlich, if ap-ptlrcaiBe, Ekofticai shock

coold muse personal

INSTALLATION

Step 1 — Check Equipment and Jobsite

UNPACKAGE UNITS — Move to final location.

Slide from cartons taking special care not to damage

service valves. Compatible Fittings or grilles.

INSPECT EQUIPMENT — File claim with ship

ping company if shipment is damaged or

incomplete.

COMPLETE OR CONSIDER SYSTEM RE

QUIREMENTS before installing the 38HQ:

Consult local building codes and National

Electrical Code (NEC) for special installation

requirements.

When installing, allow sufficient space for airflow

clearance (outdoor unit), wiring, refrigerant piping

and servicing unit. Position outdoor unit so water or

ice from roof cannot drop directly on top of unit.

Maximum allowable vertical distance between

indoor and outdoor sections is 50 feet. It is strongly

recommended that 38HQ units be used with Carrier

approved indoor sections. See Table 3.

Form 38HQ-10SI

Summary of content (20 pages)

PAGE 1
Number One Ai'rConditbninq Maker Divisiun uf Carrier Corporation Carrier Parkway • Syracuse NY 13221 Weathermaster III Heat Pump (Outdoor Coil Section; Indoor Compressor Section) INDEX SAFETY CONSIDERATIONS Page Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and quali fied service personnel should install, repair or service air conditioning equipment.
PAGE 2
,M HOLE (OR l|- KO) FOR COMPRESSOR 4-0" OVERHEAD SPACE REQUIRED FOR SERVICE AND AIRFLOW 38HQ OUTDOOR COIL SECTION i DIAM HOLE FOR CONTROL WIRING DRAINAGE HOLES - If DIAM HOLE FOR POWER WIRING LIQUID LINE CONN ik-If MTG SLOTS (USE ANY 2 TO BOLT UNIT DOWN) SPACE REQUIRED FOR SERVICE E# AIRFLOW mm SPACE REQUIRED Certified dimension drawings available on request FOR SERVICE Certified dimension drawings available on request Fig. 1 —DimensionsandConnections(Tablel) >Fig.
PAGE 3
Table 3 ^ Carrier-Approved 38HQ Systems INDOOR COMPR SECTION OUTDOOR COIL INDOOR ACCURATER™ PISTON NO. OUTDOOR ACCURATER i PISTON NO.
PAGE 4
does not obstruct drainage holes (holes drain water during heating and defrost cycles). Attach unit to pad with 1/4-in. mounting bolts. Position tiedown bolts in pad. Any 2 holes in unit basepan may be used to fasten unit to pad. Construct round, 23-in. diameter pad a mihimum of 6 in. above grade to provide clearance under holes for drainage and ice build-up. In areas where pro longed subfreezing temperatures or heavy snows occur: increase clearance from 12 to 18 in.
PAGE 5
length from compressor section to indoor coil is 50 feet. Maximum vapor line length from eompressor section to outdoor coil is 50 feet. A capacity reduction will result if accessory tubing is used in 38HQ146 systems. For example, when a 25-ft, 7/8-in. accessory tubing package is used, there will be a capacity reduction of 1-1/2%. For maximum capacity, use 1-1/8 in. vapor line as recommended in Tables 1 and 2.
PAGE 6
REPLACE THE ACCURATER™ REFRIG ERANT CONTROL PISTON IN THE INDOOR AND OUTDOOR COIL AS REQUIRED before connecting refrigerant lines. See Table 3 and the notes under the table for the pistons used in the different system combinations. For piston replace ment instructions, see AccuRater Servicing on page 16. CONNECT REFRIGERANT LINES to fittings on indoor and outdoor sections, Fig. 1,2 and 6. Indoor compressor section has 2 Compatible Fitting vapor line connections.
PAGE 7
Field wiring must comply with local and national fire, safety and electrical codes. Voltage to units must be within ± 10% of voltage indicated on nameplate. Contact local power company for cor rection of improper line voltage. Fig. 7 — Accessory Coupler When making electrical connections, provide clearance at unit for refrigerant piping connections. See Table 5 for recommended wire and fuse sizes. Line and control power wiring for 38HQ outdoor coil are from connections in the 38HQ compressor section.
PAGE 8
CONNECT WIRING GROUND LEADS AND START-UP POWER The 38HQ Indoor Section Compressor is equipped with a crankcase heater. It is recom mended that heater be energized a minimum of 24 hours before starting unit. To energize heater only, turn the thermostat to OFF position and close electrical disconnect to heat pump. Heat Anticipator Settings for Room Thermo stat (HH07AT071) — Set anticipator settings for room thermostat according to Table 6.
PAGE 9
TH ERMOSTAT 40AQ OR 40 FQ SUBBASE ELECTRIC HEATER HH93AZ0730R TERMINAL HH93AZ075 BOARD THERMOSTAT 40AQ OR 40QB FAN COIL 38HQ SUBBASE COOLING CONTROL COMPRESSOR HH93AZ073 OR KIT SECTION HH93AZ075 TERMINAL BOARD TERMINAL BOARD 38HQ COMPRESSOR SECTION TERMINAL BOARD 38HQ OUTDOOR COIL JUNCTION BOX COOLING AND ONE-STAGE HEATING (38HQ/40AQ OR 40QB WITHOUT ELECTRIC HEATER) COOLING AND TWO-STAGE HEATING (38HQWITH 40FS/28HQ/VQ EQUIPPED WITH ELECTRIC HEATER; SUPPLEMENTAL HEAT, TWO OUTDOOR THERMOSTATS) A THERMOSTA
PAGE 10
SERVICE When recharging is necessary during heating or cooling season, weigh in total charge indicated in Table 8. (Charge must be weighed in during heating season.) Remove any refrigerant remaining in sys tem before recharging. If system has lost complete charge, evacuate system to 500 microns (29.7 in. vacuum) before recharging. Service port connec tions are provided on indoor compressor section suction and discharge lines for evacuation and charging. (See Fig. 24 for service port locations.
PAGE 11
REFRIGERANT CHARGING AND CHECK CHARTS r. Fig. 10 — 38HQ120/38HQ940 with 40AQ030 or 28HQ.VQ030 Cooling Cycle Charging Chart (R-22) Fig. 12 — 38HQ127/38HQ940 with 40AQ030 or 28HQ,VQ030 or 40DQ030 Cooling Cycle Charging Chart (R-22) SUCTION PRESSURE AT COMPRESSOR SERVICE PORT (PSIG) Fig. 13 — 38HQ127/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/28HQ,VQ036 Cooling Cycle Charging Chart (R-22) Fig. 11 — 38HQ120/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/28HQ.
PAGE 12
Fig. 14 — 38HQ134/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/ 28HQ,VQ036 Cooling Cycle Charging Chart SUCTION PRESSURE AT COMPRESSOR SERVICE PORT (PSI6) Fig. 16 — 38HQ146/38HQ960 with 28HQ,VQ048 or 40FS200/28HQ.VQ048 or 40FS220/28HQ,VQ048 or 40QB048 Cooling Cycle Charging Chart 320r r’TT =[f!l ti'tL 'kT i]tl IW fini to/; -y|ii/ièi 830 cfm,70F db 1 H-H: Ì =1i‘ Hit -K-r 11 I tit WET-BULB TEMP. ^AIR ENT OUTDOOR UNIT (F)i 260 +!-rr :'t‘i ItH : 'r-‘- r .
PAGE 13
Fig. 18 — 38HQ120/38HQ940 with 40AQ036 or 28HQ.VQ036 or 40FS160/28HQ,VQ036 Heating Cycle Operation Check Chart Fig. 20 — 38HQ127/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/28HQ,VQ036 Heating Cycle Operation Check Chart Fig. 19 — 38HQ127/38HQ940 with 40AQ030 or 28HQ,VQ030 or 40DQ030 Heating Cycle Operation Check Chart Fig.
PAGE 14
VAPOR LINE CONNECTIONS CONTROL BOX RUN CAPACITOR SUCTION LINE' COMPRESSOR COMPRESSORTERMINAL BOX 38HQ INDOOR COMPRESSOR SECTION LEFT SIDE VIEW CONTROL WIRING TERMINAL BOARD Fig. 22 — 38HQ140/38HQ960 with 28HQ,VQ042 or 40FS160/28HQ.
PAGE 15
6. From intersect point, project vertically down ward to chart suction pressure line. Compare chart suction pressure to unit suction pressure (Step 2). 7. If unit suction pressure is lower than chart pressure, add refrigerant to system until chart pressure is reached. If unit suction pressure is higher than chart pressure, remove refrigerant until chart pressure is reached.
PAGE 16
Fig. 25 — 38HQ Refrigerant Flow Diagrams 5. Vent remaining pressure. DEFROST CONTROL, consisting of a defrost timer, defrost thermostat and defrost relay, inter rupts normal system heating operation every 90 minutes to defrost outdoor coil, if the coil saturated suction temperature indicates freezing tempera tures.
PAGE 17
5. I , Slide piston out by inserting a small soft wire thru metering hole (18-gage thermostat wire). See that metering hole, sealing surface around piston cones and fluted portion of piston are not damaged. 6. Clean piston refrigerant metering hole. 7. Replace retainer O-ring before reassembling bypass type AccuRater™. Carrier O-ring part no. is 99CC501052. LIQUID LINE STRAINER protects AccuRater.
PAGE 18
TROUBLESHOOTING CHART — COOLING CYCLE
PAGE 19
TROUBLESHOOTING CHART — HEATING CYCLE
PAGE 20
( i K For replacement items use Carrier Specified Parts. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.