Carrier 50DF034 User Manual download pdf

HEATING & COOLING

50DF034

Single-Package Cooling Units

Installation, Start-Up and

Service Instructions

SAFETY CONSIDERATIONS

Installation and servicing of air conditioning

equipment can be hazardous due to system pressure and

electrical components. Only trained and qualified service

personnel should install, repair or service air conditioning

equipment.

Untrained personnel can perform basic maintenance

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 unbrazing operations.

Have fire extinguisher available for all brazing

operations.

A WARNING

Before performing service or maintenance operations

on unit, turn off main power switch to unit. Elec

trical shock could cause personal injury.

INSTALLATION

Rigging and Unit Placement — Inspect unit for

transportation damage. File claim with transportation

agency. Do not remove shipping skid until unit is ready

to be set in final location. Do not drop unit; keep upright.

Use spreader bars over unit to prevent sling or cable

damage. Rollers may be used to move unit across a roof.

Level by using unit frame as reference. See Fig. 1 for

additional information. Unit weight is shown in Table 1.

Units are designed to be hoisted only. However, units

with optional shipping skids may be moved with a fork

truck. Refer to Accessory Roof Curb Installation Instruc

tions for additional information as required.

Roof Curb — Assemble and install as described in

instructions shipped with this accessory. Accessory roof

curb and information required to field fabricate a roof

curb of 2-in.

X 14-in. planks is shown in Fig. 2. Install

insulation, cant strips, roofing and flashing as required.

For unit drains to function properly, curb must be level

or within tolerances shown in Fig. 3.

Roof Mount — Check building codes for weight dis

tribution requirements Unit weight is shown in Table 1.

Slab Mount — Provide a level concrete slab that

extends beyond unit cabinet at least 6 inches. Make a slab

8 in. thick with 4 in. above grade. Use gravel apron in

front of condenser air inlet to prevent grass and foliage

from obstructing airflow.

Alternate Unit Support Methods — Where the

preferred curb or slab mount cannot be used, support

unit with sleepers on perimeter, using curb support area.

However, if sleepers cannot be used, support long sides

of unit (dimension A, Fig. 4) with three 4-in. x 4-in. pads

equally spaced. U nit may sag if supported by corners only.

Positioning — Unit condenser air inlets and outlets

may be located in any compass direction since they are

not affected by wind. Provide clearances around and

above unit for airflow, safety and service access (Fig 4).

Do not install unit in an indoor location Do not locate

air inlets near exhaust vents or other sources of con

taminated air

Although unit is weatherproof, guard against water

from higher level runoff and overhangs.

NOTES-

1 All unit panels must be In place when rigging.

2 Do not handle unit with fork trucks

3 Use 4 cables and four 2-by-4’s or 4-by-4's of dimensions

shown.

Fig. 1 — Rigging Details

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.

Book|l PC111 Catalog No 565-032 PrintedinUSA Form 50DF-9SI Pgl 4-86 Replaces: 50DF-7SI

For replacement items use Carrier Specified Parts

Tab lib

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - Service Instructions

HEATING & COOLING50DF034Single-Package Cooling UnitsInstallation, Start-Up and Service InstructionsSAFETY CONSIDERATIONSInstallation and servici

Page 2 - Fig. 2 — Roof Curb Dimensions

CIRCUIT BREAKERSCONVENIENCE OUTLET LOW AMBIENT LOCKOUT THERMOSTATLOOIC PANELFig. 13 — Control BoxMOVE SWITCH TOPOSITION FORDESIRED HEATING SETBACK(A)

Page 3 - HORIZONTAL

rHEATING LEVER(RED)COOLING LEVER (BLUE)THERMOSTATCAPTIVE TERMINAL MOUNTING SCREWS THERMOSTAT/TRANSMITTERFig. 15 — Electronic Thermostat/Transmitter (w

Page 4 - Fig. 4 Base Unit Dimensions

above enthalpy set point, the outdoor air dampers remain at minimum position.) Economizer acts as the first stage of cooling, providing “free cooling”

Page 5

3. Remove spring on motor shaft.4. Adjust switch as shown in Fig. 17.5. After adjustment, replace spring on motor shaft and reassemble return sprin

Page 6 - I "-1

3. Connect one meter lead to logic panel terminal T and the other meter lead to the loose lead wire from the sensor.4. Meter readings depend on

Page 7 - Table 1 — Physical Data

Table 3 — Indoor Air Fan DataEXTERNAL STATIC PRESSURE (in. wg)UNIT50DFCFM 0.200.400.60 0.801.001.201.40 1.60 1.80 2.002.20Rpm BhpRpmBhp RpmBhp RpmBhp

Page 8 - Table 2 — Electrical Data

Outdoor (Condenser) Air Fan Adjustment(Fig. 21) — Shut off unit power supply Remove fan guard and loosen fan hub setscrews Adjust fan

Page 9 - REMOTE CONTROL

GASKETRIGID INSULATION (FIELD SUPPLIED)NOTE' Certified dimension drawings available upon requestFig. 2 — Roof Curb Dimensions3-|"{ENDS OF U

Page 10 - Fig. 13 — Control Box

CONDENSERANDCOMPRESSORENDHORIZONTALFig. 3 — Unit Leveling TolerancesEconomizer SectionECONOMIZER HOOD INSTALLATION (Fig. 7) — The economizer mech

Page 11 - THERMOSTAT/TRANSMITTER

ALTERNATE CONTROL WIREOPENING3 AND 4g- K 0ALTERNATE FIELD-POWER WIRING (COOLING ONLY UNIT )INDOOR AIR FAN AND FILTER ACCESS PANELSOUTDOOR AIR FANS

Page 12 - OPERATIONAL

Fig. 5 — Concentric Duct DetailsFig. 7 — Economizer Outdoor Air Inlet Hood AssemblyFig. 8 — Enthalpy Control AssemblyFig. 6 — Manual Damper Unit Indoo

Page 13

MAIN POWER TERMINAL BLOCK IN UNIT CONTROL BOX OR HEATER COMPARTMENTFIELD POWER SUPPLYTB4MAIN CONTROL BOXL3_i—L2THERMOSTAT SUBBASE NOTE. Thermostat sub

Page 14 - A CAUTION

Table 1 — Physical DataUNIT50DF034OPERATING WEIGHT (lb)4400Base Unit (includes heaters)Base Unit with Economizer4600COMPRESSORServiceable, Reciprocati

Page 15

Table 2 — Electrical DataNOMINALVOLTS/PH/HZVOLTAGERANGECOMPR NO. 1COMPR NO. 2OUTDOOR FAN MTRINDOOR FAN MTREXHAUST FAN MTRHEATERSPOWER SUPPLY*Circuit 1

Page 16 - Damage to motor will result

fField Control WiringSTANDARD UNIT (WITHOUT ENERGY MANAGEMENT ACCESSORY) — Install a Carrier-approved accessory electronic thermostat on a subba

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