Carrier NP034-074- User Manual

Carrier NP034-074

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Table of Contents:

  • Page 3 – If roof curb is not used, support unit with steel beams along; Positioning —; Provide clearance around and above unit; UNIT; Fig. 1 — Rigging Label
  • Page 6 – Table 2 — Operating Weights of Options and Accessories; Field-Fabricated Ductwork —; Units are designed for; UNIT CENTER OF GRAVITY AND CORNER WEIGHTS; Fig. 2 — Weight Distribution and Center of Gravity
  • Page 15 – ROOF MOUNT DRAIN; Fig. 8 — Condensate Drain Piping Details
  • Page 16 – Fig. 13 — Psychrometric Chart for
  • Page 17 – Field Wire Routing; If field power wiring is brought through the roof curb, route; Field Electrical Connections; Fig. 14 — Wiring Connections for Solid-State
  • Page 18 – — Ground; Fig. 18 — Field Power Wiring Connections
  • Page 19 – Table 3 — Electrical Data, 034 Units
  • Page 22 – Table 4 — Electrical Data, 044 Units
  • Page 25 – Table 5 — Electrical Data, 054 Units
  • Page 28 – Table 6 — Electrical Data, 064 Units
  • Page 31 – Table 7 — Electrical Data, 074 Units
  • Page 34 – NOTES AND LEGEND FOR FIG. 20; Fig. 19 — Field Control Thermostat Wiring
  • Page 35 – Fig. 20 — Field Wiring for Building Pressurization and Smoke Purge
  • Page 36 – Fig. 21 — Gas Piping Details
  • Page 38 – Table 8 — Oil Charge; UNIT SIZE
  • Page 43 – All gas system components are in the gas section.; Fig. 35 — Modulating Power Exhaust Damper
  • Page 44 – The electric heater control box contains:; Fig. 37 — Gas Section Detail, 48 Series 034 and; Fig. 40 — Flue Box Assembly, 48 Series Units Only
  • Page 45 – Fig. 42 — Typical Electric Heat Control Box
  • Page 46 – Adjustments; Fig. 44 — Motor Plate Adjustment
  • Page 47 – Fig. 45 — Pulley Alignment
  • Page 50 – Fig. 60 — Auxiliary Switch Stroke Adjustment
  • Page 51 – Fig. 61 — Auxiliary Switch Adjustment
  • Page 52 – Table 11 — Pressure Switch Settings (psig); Control Circuit, 115 V —; Table 12 — Economizer Motor Checkout
  • Page 53 – Unit Control Board Checkout —; Table 16 — Economizer Control Board Checkout,
  • Page 54 – — Plug; Fig. 64 — Control Board Component Arrangement
  • Page 56 – Fig. 65 — Compressor Lockout Connections
  • Page 70 – PACKAGED SERVICE TRAINING; equipment discussed in this manual. Product programs cover:
Loading the manual

Installation, Start-Up and

Service Instructions

CONTENTS

Page

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . 2

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37

Rigging and Unit Placement

. . . . . . . . . . . . . . . . . . 2

Roof Curb

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Roof Mount

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Slab Mount

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Positioning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Field-Fabricated Ductwork

. . . . . . . . . . . . . . . . . . . . 6

Condensate Drains

. . . . . . . . . . . . . . . . . . . . . . . . . . 10

Install Outdoor Hoods

. . . . . . . . . . . . . . . . . . . . . . . 10

• UNIT SIZES 034 AND 044
• UNIT SIZES 054-074

Outdoor-Air Inlet Adjustments

. . . . . . . . . . . . . . . 10

• MANUAL OUTDOOR-AIR DAMPER
• ECONOMIZER SETTINGS

Field Wire Routing

. . . . . . . . . . . . . . . . . . . . . . . . . . 17

• UNIT SIZES 034 AND 044
• UNIT SIZES 054-074

Field Electrical Connections

. . . . . . . . . . . . . . . . . 17

• POWER WIRING
• CONTROL WIRING

Gas Piping (48 Series Units Only)

. . . . . . . . . . . . 36

Installing Flue/Inlet Hoods (48 Series Units

Only)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

• UNIT SIZES 034 AND 044
• UNIT SIZES 054-074

PRE-START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-41

Unit Preparation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compressor Mounting

. . . . . . . . . . . . . . . . . . . . . . . 38

Evaporator-Fan Shipping Brackets

. . . . . . . . . . . 38

• UNIT SIZES 034 AND 044
• UNIT SIZES 054-074

Internal Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Refrigerant Service Valves

. . . . . . . . . . . . . . . . . . . 38

Crankcase Heaters

. . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compressor Oil

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Gas Manifold Pressure (48 Series

Units Only)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Unit Voltage

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Leak Test and Dehydration

. . . . . . . . . . . . . . . . . . 39

Evaporator-Fan Belts, Pulleys, and Sheaves

. . 39

Condenser Fans and Motors

. . . . . . . . . . . . . . . . . 40

Return-Air Filters

. . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Economizer Inlet Screens

. . . . . . . . . . . . . . . . . . . 40

Economizer Dampers

. . . . . . . . . . . . . . . . . . . . . . . 40

25% Outdoor-Air Damper

. . . . . . . . . . . . . . . . . . . . 40

Initial Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41,42

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Operating Sequences

. . . . . . . . . . . . . . . . . . . . . . . 41

• COOLING, UNITS WITHOUT ECONOMIZER
• HEATING, UNITS WITHOUT ECONOMIZER

Page

• COOLING, UNITS WITH ECONOMIZER
• HEATING, UNITS WITH ECONOMIZER
• VENTILATION AIR CIRCULATION (Continuous Fan)
• AUTOMATIC CHANGEOVER USING AUTOMATIC

CHANGEOVER THERMOSTAT

Head Pressure Control

. . . . . . . . . . . . . . . . . . . . . . 42

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-53

Service Access

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

• COMPRESSORS
• LIQUID SERVICE VALVES, FILTER DRIERS, AND

SIGHT GLASSES

• EVAPORATOR-FAN MOTORS, PULLEYS, AND

BELTS

• POWER EXHAUST MOTORS, PULLEYS, AND

BELTS

• UNIT CONTROL BOX
• GAS HEAT SECTION (48 Series Units Only)
• MAIN AND PILOT BURNERS (48 Series Units Only)
• FLUE GAS PASSAGEWAYS (48 Series Units Only)
• COMBUSTION AIR BLOWER (48 Series Units Only)
• ECONOMIZER DAMPER MOTOR
• ELECTRIC HEATER CONTROL BOX (50 Series

Units Only)

• HEATER BOX (50 Series Units Only)
• 25% OUTDOOR-AIR DAMPER
• MODULATING POWER EXHAUST DAMPER

MOTOR

• RETURN-AIR FILTERS
• CONDENSER FANS AND FAN MOTORS
• INLET GUIDE VANE MOTOR

Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Lubrication

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

• COMPRESSORS
• FAN SHAFT BEARINGS
• INLET GUIDE VANE BEARINGS (Units With

Optional Inlet Guide Vanes)

• FAN MOTOR BEARINGS
• DOOR HINGES

Adjustments

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

• EVAPORATOR FAN AND POWER EXHAUST

MOTOR PLATE

• MODULATING POWER EXHAUST DIFFERENTIAL

PRESSURE SWITCH

• INLET GUIDE VANE DIFFERENTIAL PRESSURE

SWITCH (Units With Optional Inlet Guide Vanes and
Static Pressure Control)

• BELT INSTALLATION AND TENSIONING
• PULLEY ALIGNMENT
• INSTALLING ALTERNATE MOTOR PULLEY

(Evaporator Fan Only)

• CONDENSER FAN ADJUSTMENT
• 25% OUTDOOR-AIR DAMPER
• REFRIGERANT CHARGE
• PILOT LIGHT OFF (48 Series Units Only)

48DJ,DK,NP034-074

50DJ,DK,DW,DY,NB,NP034-074

Single Package Heating and Cooling Units

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

Book 1

1

Tab

1a 1b

PC 111

Catalog No. 564-818

Printed in U.S.A.

Form 48/50D,N-9SI

Pg 1

3-96

Replaces: 48DJ,DK-3SI;

48/50NB,NP-1SI; 50DJ,DK-9SI

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Summary

Page 3 - If roof curb is not used, support unit with steel beams along; Positioning —; Provide clearance around and above unit; UNIT; Fig. 1 — Rigging Label

If roof curb is not used, support unit with steel beams along its entire length and then support steel as required. As a mini-mum, unit must be supported across its width at each liftinglug location. Positioning — Provide clearance around and above unit for airflow, safety, and service access. Do no...

Page 6 - Table 2 — Operating Weights of Options and Accessories; Field-Fabricated Ductwork —; Units are designed for; UNIT CENTER OF GRAVITY AND CORNER WEIGHTS; Fig. 2 — Weight Distribution and Center of Gravity

Table 2 — Operating Weights of Options and Accessories OPTION OR ACCESSORY UNIT SIZE 034 044 054 064 074 Roof Curb 48DJ,DK,NP 50DW,DY,NB 50DJ,DK,NP 450450380 480480465 515560515 515560515 515560515 Condenser Section Roof Curb — — 540 540 625 Economizer 300* 300* 530* 530* 530* Power Exhaust 600* 600...

Page 15 - ROOF MOUNT DRAIN; Fig. 8 — Condensate Drain Piping Details

034 UNITS 044-074 UNITS Fig. 5 — Drain Location Selection Fig. 6 — Condensate Drain Location Fig. 7 — Seal Plate Location ROOF MOUNT DRAIN SLAB MOUNT DRAIN Fig. 8 — Condensate Drain Piping Details Fig. 9 — Outdoor-Air Hood 15

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