Carrier 50HCQA User manual

50HCQA

Single Package Rooftop

Heat Pump

with Puronr(R---410A) Refrigerant

S i z e s 0 4 --- 0 6

Installation Instructions

NOTE: Read the entire instruction manual before starting

the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2....................

INSTALLATION 4...............................

Jobsite Survey 4................................

Step 1 -- Plan for Unit Location 4..................

Roof Mount 5...............................

Step 2 -- Plan for Sequence of Unit Installation 5......

Curb--Mount Installation 5.....................

Pad--Mount Installation 5......................

Frame--Mount Installation 5....................

Step 3 -- Inspect Unit 5...........................

Step 4 -- Provide Unit Support 5...................

Roof Curb Mount 5..........................

Slab Mount (Horizontal Units Only) 5...........

Alternate Unit Support 5......................

Step 5 -- Field Fabricate Ductwork 7................

For Units with Accessory Electric Heaters 7......

Step 6 -- Rig and Place Unit 7.....................

Positioning on Curb 8........................

Step 7 -- Convert to Horizontal & Connect Ductwork 8..

Step 8 -- Install Outside Air Hood 9................

Economizer Hood Removal and Setup 9.........

Two Position Damper Hood Removal and Setup 9...

Economizer Hood and Two--Position Hood 10.....

Step 9 -- Install External Condensate Trap and Line 10...

Step 10 -- Make Electrical Connections 11...........

Field Power Supply 11........................

Units without Factory--Installed Disconnect 11....

Units with Factory--Installed Disconnect 12.......

Convenience Outlets 12.......................

Factory--Option Thru--Base Connections 13.......

Units without Thru--Base Connections 14.........

Field Control Wiring 14.......................

Thermostat 14...............................

Unit without Thru--Base Connection Kit 14.......

Heat Anticipator Settings 14...................

Electric Heaters 15..............................

Single Point Boxes and Supplementary Fuses 16.....

PremierLinkt(Factory Option) 17.................

Supply Air Temperature (SAT) Sensor 17.........

Outdoor Air Temperature (OAT) Sensor 19.......

EconoMi$ert219...........................

Field Connections 19..........................

Space Temperature (SPT) Sensors 19............

Connect Thermostat 19.......................

Configure the Unit for Thermostat Mode 22......

Economizer Controls 22........................

Outdoor Air Enthalpy Control 22...............

Differential Enthalpy Control 22................

Return Air Enthalpy Sensor 22

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

Indoor Air Quality (CO2sensor) 22.............

Outdoor Air Quality Sensor 23.................

Smoke Detector/Fire Shutdown (FSD) 23.........

Filter Status Switch 24........................

Supply Fan Status Switch 24...................

Remote Occupied Switch 24...................

Space Relative Humidity Sensor 24.............

Power Exhaust (output) 24.....................

CCN Communication Bus 24..................

RTU--MP Control System 26......................

Supply Air Temperature (SAT) Sensor 28.........

Outdoor Air Temperature (OAT) Sensor 28.......

EconoMi$ert228...........................

Field Connections 29..........................

Space Sensors 29............................

Economizer Controls 29........................

Outdoor Air Enthalpy Control 29...............

Differential Enthalpy Control 29................

Return Air Enthalpy Sensor 29.................

Indoor Air Quality (CO2sensor) 30.............

Outdoor Air Quality Sensor 30.................

Connecting Discrete Inputs 30..................

Communication Wiring -- Protocols 31............

General 31.................................

Local Access 32.............................

RTU--MP Troubleshooting 32..................

Smoke Detectors 33.............................

System 33..................................

Controller 33...............................

Sensor 33..................................

Smoke Detector Locations 34....................

Supply Air 34...............................

Return Air without Economizer 35..............

Return Air with Economizer 35.................

Step 11 -- Adjust Factory--Installed Options 42........

Step 12 -- Install Accessories 43...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical

shock or other conditions which may cause personal

injury or property damage. Consult a qualified installer,

service agency, or your distributor or branch for

information or assistance. The qualified installer or

agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual

instructions packaged with the kits or accessories when

installing.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloths for brazing operations and

have a fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions attached to

the unit. Consult local building codes and appropriate

national electrical codes (in USA, ANSI/NFPA70,

National Electrical Code (NEC); in Canada, CSA C22.1)

for special requirements.

It is important to recognize safety information. This is the

safety--alert symbol . When you see this symbol on the

unit and in instructions or manuals, be alert to the

potential for personal injury.

Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. These words are used with the

safety--alert symbol. DANGER identifies the most serious

hazards which will result in severe personal injury or

death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify

unsafe practices, which may result in minor personal

injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced

installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.

Before performing service or maintenance operations

on unit, always turn off main power switch to unit and

install lockout tag. Unit may have more than one

power switch.

!WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

injury, death and/or equipment damage.

Puronr(R--410A) refrigerant systems operate at

higher pressures than standard R--22 systems. Do not

use R--22 service equipment or components on Puron

refrigerant equipment.

!WARNING

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could cause personal

injury or death.

Relieve pressure and recover all refrigerant before

system repair or final unit disposal.

Wear safety glasses and gloves when handling

refrigerants. Keep torches and other ignition sources

away from refrigerants and oils.

!WARNING

CUT HAZARD

Failure to follow this caution may result in personal

injury.

Sheet metal parts may have sharp edges or burrs. Use

care and wear appropriate protective clothing, safety

glasses and gloves when handling parts and servicing

heat pump units.

CAUTION

50HCQA

Horizontal Connections / Economizer

Vertical Connections / Economizer

C10230

Fig. 1 -- Unit Dimensional Drawing – 04 — 06 Size Units

50HCQA

C10231

Fig. 1 -- Unit Dimensional Drawing – 04 — 06 Size Unit (cont.)

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (National

Electrical Code) ANSI/NFPA 70 for special installa-

tion requirements.

2. Determine unit location (from project plans) or select

unit location.

3. Check for possible overhead obstructions which may

interfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb

or other) that provides for the minimum clearances

required for safety. This includes the clearance to

combustible surfaces, unit performance and service access

below, around and above unit as specified in unit

drawings. See Fig. 2.

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or on Class

A, B, or C roof--covering material when roof curb is used.

Do not install unit in an indoor location. Do not locate air

inlets near exhaust vents or other sources of contaminated

air.

18” (457)

42" (1067)

18" (457)

42" (1067)

Required bottom condensate drain connection.

Otherwise, 36” (914mm) for condensate connection.

C07459

Fig. 2 -- Service Clearance Dimensional Drawing

Although unit is weatherproof, avoid locations that permit

water from higher level runoff and overhangs to fall onto

the unit.

Select a unit mounting system that provides adequate

height to allow for removal and disposal of frost and ice

that will form during the heating--defrost mode as well as

allow installation of condensate trap per requirements.

RefertoStep9—InstallExternalCondensate Trap and

Line – for required trap dimensions.

50HCQA

Roof Mount —

Check building codes for weight distribution

requirements. Unit operating weight is shown in Table 1.

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different

sequences for the steps of unit installation. For example,

on curb--mounted units, some accessories must be

installed on the unit before the unit is placed on the curb.

Review the following for recommended sequences for

installation steps.

Curb--mounted installation —

Install curb

Install field--fabricated ductwork inside curb

Install accessory thru--base service connection package

(affects curb and unit) (refer to accessory installation

instructions for details)

Prepare bottom condensate drain connection to suit

planned condensate line routing (refer to Step 9 for

details)

Rig and place unit

Install outdoor air hood

Install condensate line trap and piping

Make electrical connections

Install other accessories

Pad--mounted installation —

Prepare pad and unit supports

Check and tighten the bottom condensate drain

connection plug

Rig and place unit

Convert unit to side duct connection arrangement

Install field--fabricated ductwork at unit duct openings

Install outdoor air hood

Install condensate line trap and piping

Make electrical connections

Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the

sequence for a curb installation. Adapt as required to

suit specific installation plan.

Step 3 — Inspect unit

Inspect unit for transportation damage. File any claim

with transportation agency.

Confirm before installation of unit that voltage, amperage

and circuit protection requirements listed on unit data

plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in

Fig. 3. Assemble and install accessory roof curb in

accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is

critical for a watertight seal. Install gasket supplied with

the roof curb as shown in Fig. 3. Improperly applied

gasket can also result in air leaks and poor unit

performance.

Curb should be level. This is necessary for unit drain to

function properly. Unit leveling tolerances are show in

Fig. 4. Refer to Accessory Roof Curb Installation

Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter

flashing as shown. Ductwork must be attached to curb and

not to the unit. The accessory thru--the--base power package

must be installed before the unit is set on the roof curb.

If electric and control wiring is to be routed through the

basepan, attach the accessory thru--the--base service

connections to the basepan in accordance with the

accessory installation instructions.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of

6 in. (150 mm) beyond unit cabinet. Install a gravel apron

in front of condenser coil air inlet to prevent grass and

foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb

if required.

Alternate Unit Support (In Lieu of Curb or Slab

Mount) —

A non--combustible sleeper rail can be used in the unit curb

support area. If sleeper rails cannot be used, support the long

sides of the unit with a minimum of 3 equally spaced 4--in. x

4--in. (102 mm x 102 mm) pads on each side.

Table 1 – Operating Weights

50HCQA UNITS LB (KG)

Component 04 05 06

Base Unit 495 (225) 580 (263) 610 (277)

Economizer

Vertical 80 (36) 80 (36) 80 (36)

Horizontal 105 (48) 105 (48) 105 (48)

Powered Outlet 32 (15) 32 (15) 32 (15)

Curb

14---in / 356 mm 110 (50) 110 (50) 110 (50)

24---in / 610 mm 145 (66) 145 (66) 145 (66)

50HCQA

50HCQA04-06

ROOFCURB

ACCESSORY

CRRFCURB001A02

CRRFCURB002A02

1’ - 2”

[356]

2’ - 0”

[610]

UNIT SIZE

C10232

Fig. 3 -- Roof Curb Details

50HCQA

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

C06110

Fig. 4 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition)

shall not exceed 0.35 in. wg (87 Pa) with economizer or

0.45 in. wg (112 Pa) without economizer.

For vertical ducted applications, secure all ducts to roof

curb and building structure. Do not connect ductwork to

unit.

Insulate and weatherproof all external ductwork, joints,

and roof openings with counter flashing and mastic in

accordance with applicable codes.

Ducts passing through unconditioned spaces must be

insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return

should be ducted through the roof deck to comply with

applicable fire codes.

For Units with Accessory Electric Heaters —

Horizontal applications require a minimum clearance to

combustible surfaces of 1--in (25 mm) from duct for first

12--in (305 mm) away from unit. Vertical applications do not

require a minimum clearance.

Minimum clearance is not required around ductwork.

Outlet grilles must not lie directly below unit discharge.

NOTE: A 90--degree elbow must be provided in the

ductwork to comply with UL (Underwriters Laboratories)

code for use with electric heat.

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personal

injury.

For vertical supply and return units, tools or parts

could drop into ductwork and cause an injury. Install

a 90--degree turn in the return ductwork between the

unit and the conditioned space. If a 90--degree elbow

cannot be installed, then a grille of sufficient strength

and density should be installed to prevent objects

from falling into the conditioned space. Due to

electric heater, supply duct will require 90--degree

elbow.

!WARNING

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not

required if top crating is left on unit. Rollers may be used to

move unit across a roof. Level by using unit frame as a

reference. See Table 1 and Fig. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 5.

Refer to rigging instructions on unit.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in

equipment damage.

All panels must be in place when rigging. Unit is not

designed for handling by fork truck.

CAUTION

Before setting the unit onto the curb, recheck gasketing on

curb.

50HCQA

C06005

UNIT MAX WEIGHT DIMENSIONS

A B C

LB KG IN MM IN MM IN MM

50HCQA04 725 330 74.5 1890 38.5 980 33.5 850

50HCQA05 845 384 74.5 1890 37.5 955 41.5 1055

50HCQA06 900 409 74.5 1890 37.5 955 41.5 1055

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the

unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

Fig. 5 -- Rigging Details

PositioningonCurb—

Position unit on roof curb so that the following clearances

are maintained: 1/4in. (6.4 mm) clearance between the

roof curb and the base rail inside the front and rear, 0.0 in.

clearance between the roof curb and the base rail inside on

the duct end of the unit. This will result in the distance

between the roof curb and the base rail inside on the

condenser end of the unit being approximately equal to

Fig. 3, section C--C.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

After unit is in position, remove the compressor access

panel. Holding the blocking between compressors with

one hand, cut the strapping. Carefully remove the

blocking without damaging tubing, wiring, or controls.

Remove the strapping and replace the access panel.

Remove all shipping materials and top skid. Recycle or

dispose of all shipping materials.

Step 7 — Convert to Horizontal and Connect

Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit

without factory--installed economizer or return air smoke

detector option may be field--converted to horizontal

ducted configuration. To convert to horizontal

configuration, remove screws from side duct opening

covers and remove covers. Using the same screws, install

covers on vertical duct openings with the insulation--side

down. Seals around duct openings must be tight. See

Fig. 6.

C06108

Fig. 6 -- Horizontal Conversion Panels

Field--supplied flanges should be attached to horizontal

duct openings and all ductwork should be secured to the

flanges. Insulate and weatherproof all external ductwork,

joints, and roof or building openings with counter flashing

and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informative

data plate when insulating horizontal ductwork.

50HCQA

Step 8 — Install Outside Air Hood

Economizer Hood Removal and Setup --

Factory Option —

1. The hood is shipped in knock--down form and located

in the return air compartment. It is attached to the

economizer using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access

panel. (See Fig. 7.)

3. Locate and cut the (2) plastic tie--wraps, being careful

to not damage any wiring. (See Fig. 8.)

4. Carefully lift the hood assembly through the filter

access opening and assemble per the steps outlined

in Economizer Hood and Two–Position Hood on

page 10.

FILTER ACCESS PANEL

OUTDOOR-AIR OPENING AND

INDOOR COIL ACCESS PANEL

COMPRESSOR

ACCESS PANEL

C06023

Fig. 7 -- Typical Access Panel Locations

Two Position Damper Hood Removal and Setup --

Factory Option —

1. The hood is shipped in knock--down form and

assembled to a metal support tray using plastic stretch

wrap. Located in the return air compartment, the

assembly’s metal tray is attached to the basepan and

also attached to the damper using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access

panel. (See Fig. 7.)

3. Locate the (2) screws holding the metal tray to the

basepan and remove. Locate and cut the (2) plastic

tie--wraps securing the assembly to the damper. (See

Fig. 9.) Be careful to not damage any wiring or cut

tie--wraps securing any wiring.

4. Carefully lift the hood assembly (with metal tray)

through the filter access opening and assemble per the

steps outlined in Economizer Hood and Two–Position

Hood on page 10.

Economizer

Cut Plastic Ties

(2) Places

Remove Hood Parts

C08633

Fig. 8 -- Economizer Wiring

Hood Parts

Plastic Tie Wrap

Qty (2)

Screws for Metal Tray

Qty (2)

C08639

Fig. 9 -- Damper Assembly

50HCQA

Economizer Hood and Two--Position Hood —

NOTE: If the power exhaust accessory is to be installed

on the unit, the hood shipped with the unit will not be

used and must be discarded. Save the aluminum filter for

use in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top of

the hood. Remove the screws along the sides and bot-

tom of the indoor coil access panel. See Fig. 10.

SIDE

PANEL

INDOOR

COIL

ACCESS

PANEL

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

SIDE

PANEL

C06025

Fig. 10 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the

hood sides under the panel (hood top). Use the screws

provided to attach the hood sides to the hood top. Use

screws provided to attach the hood sides to the unit.

See Fig. 11.

TOP

PANEL

INDOOR COIL

ACCESS PANEL

19 1/16”

SCREW

HOOD DIVIDER

LEFT

HOOD

SIDE

33 3/8”

(848mm)

(483mm)

C06026

Fig. 11 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizer ba-

rometric relief damper in place.

4. Insert the hood divider between the hood sides. See

Fig. 11 and 12. Secure hood divider with 2 screws on

each hood side. The hood divider is also used as the

bottom filter rack for the aluminum filter.

5. Open the filter clips which are located underneath the

hood top. Insert the aluminum filter into the bottom

filter rack (hood divider). Push the filter into position

past the open filter clips. Close the filter clips to lock

the filter into place. See Fig. 12.

DIVIDER

BAROMETRIC

RELIEF

CLEANABLE

ALUMINUM

FILTER FILTER

HOOD

FILTER

CLIP

OUTSIDE

AIR

C08634

Fig. 12 -- Economizer Filter Installation

6. Caulk the ends of the joint between the unit top panel

and the hood top.

7. Replace the filter access panel.

Step 9 — Install External Condensate Trap and

Line

The unit has one 3/4-in. condensate drain connection on

the end of the condensate pan and an alternate connection

on the bottom. See Fig. 13. Unit airflow configuration

does not determine which drain connection to use. Either

drain connection can be used with vertical or horizontal

applications.

When using the standard side drain connection, ensure the

red plug in the alternate bottom connection is tight. Do

this before setting the unit in place. The red drain pan can

be tightened with a 1/2--in. square socket drive extension.

To use the alternate bottom drain connection, remove the

red drain plug from the bottom connection (use a 1/2-- i n .

square socket drive extension) and install it in the side

drain connection.

DRAIN

(FACTORY-INSTALLED)

PLUG

CONDENSATE PAN (SIDE VIEW)

STANDARD

SIDE DRAIN

ALTERNATE

BOTTOM DRAIN

C08021

Fig. 13 -- Condensate Drain Pan (Side View)

The piping for the condensate drain and external trap can

be completed after the unit is in place. See Fig. 14.

50HCQA

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