Carrier 50HCQ12 User manual

50HCQ12

Single Package Rooftop

Heat Pump

with Puronr(R---410A) Refrigerant

Size 12

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

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 13....

Units with Factory--Installed Disconnect 13.......

Convenience Outlets 13.......................

Factory--Option Thru--Base Connections 15.......

Units without Thru--Base Connections 15.........

Field Control Wiring 15.......................

Thermostat 15...............................

Unit without Thru--Base Conversion Kit 16.......

Heat Anticipator Settings 16...................

Electric Heaters 16..............................

Single Point Boxes 17..........................

Heater Low--Voltage Control Connections 17......

Outdoor Air Enthalpy Control 18.................

Differential Enthalpy Control 18................

Return Air Enthalpy Sensor 18.................

PremierLinkt(Factory Option) 19.................

Supply Air Temperature (SAT) Sensor 19.........

Outdoor Air Temperature (OAT) Sensor 21.......

EconoMi$er2 21.............................

Field Connections 21..........................

Space Sensors 21............................

Connect Thermostat 21.......................

Configure the Unit for Thermostat Mode 24......

Economizer Controls 24........................

Indoor Air Quality (CO2sensor) 24.............

Outdoor Air Quality Sensor 24.................

Smoke Detector/Fire Shutdown (FSD) 25.........

Filter Status Switch 25........................

Supply Fan Status Switch 25...................

Remote Occupied Switch 25...................

Space Relative Humidity Sensor 26.............

Power Exhaust (output) 26.....................

CCN Communication Bus 26..................

RTU Open Control System 27.....................

Supply Air Temperature (SAT) Sensor 29.........

Outdoor Air Temperature (OAT) Sensor 29.......

EconoMi$er2 29.............................

Field Connections 30..........................

Space Temperature (SPT) Sensors 30............

Indoor Air Quality (CO2)Sensor 30.............

Outdoor Air Quality Sensor 31.................

Connecting Discrete Inputs 31..................

Communication Wiring -- Protocols 32............

General 32.................................

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

RTU Open Troubleshooting 32.................

Smoke Detectors 34.............................

System 34..................................

Controller 34...............................

Sensor 34..................................

Smoke Detector Locations 35....................

Supply Air 35...............................

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

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

Step 11 -- Adjust Factory--Installed Options 39........

Step 12 -- Install Accessories 40...................

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

50HCQD12

Vertical Connections / Economizer

Horizontal Connections / Economizer

C10845

Fig. 1 -- Unit Dimensional Drawing – 12 Size Unit

50HCQD12

C10846

Fig. 1 -- Unit Dimensional Drawing – 12 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 at least 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, relief valves, or other sources of

contaminated air.

18”

(457) *42"

(1067)

*Required bottom condensate drain connection.

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

42"

(1067)

42"

(1067)

C10849

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.

50HCQD12

Roof Mount —

Check building codes for weight distribution

requirements. Unit operating weight is shown in Table 1.

Table 1 – Operating Weights

50HCQD12

COMPONENT UNITS LB (KG)

Base Unit 1390 (632)

Economizer

Vertical 100 (45)

Horizontal 115 (52)

Powered Outlet 32 (15)

Curb

14---in/356 mm 180 (82)

24---in/610 mm 235 (107)

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. 5. 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.

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.

50HCQD12

C10855

Fig. 3 -- Roof Curb Details

50HCQD12

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

C10001

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 —

All installations require a minimum clearance to

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

12--in (305 mm) away from unit.

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

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage

to roofing materials.

Membrane roofs can be cut by sharp sheet metal

edges. Be careful when placing any sheet metal parts

on such roof.

CAUTION

Step 6 — Rig and Place Unit

When the unit is ready to be rigged and no longer will be

lifted by a fork truck, the wood protector under the basepan

must be removed. Remove 4 screws from each base rail.

Wood protector will drop to the ground. See instructions on

the unit base rails.

Keep unit upright and do not drop. Spreader bars are

required. 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.

50HCQD12

DETAIL “A”

SEE DETAIL “A”

914 - 1371

( 36” - 54” )

“B”

“A”

“C”

PLACE ALL GASKET IN PLACE BEFORE PLACING

UNIT ON ROOF CURB.

DUCT END

C10281

UNIT MAX WEIGHT DIMENSIONS

A B C

LB KG IN MM IN MM IN MM

50HCQD12 2075 943 116.0 2945 58.5 1485 59.5 1510

NOTES:

1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

2. Dimensions in ( ) are in millimeters.

3. 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—

For full perimeter curbs CRRFCURB072A00 and

073A00, the clearance between the roof curb and the front

and rear base rails should be 1/4in (6.4 mm). The

clearance between the curb and the end base rails should

be 1/2in (13 mm). For retrofit applications with curbs

CRRFCURB003A01 and 4A01, the unit should be

position as shown in Fig. 6. Maintain the 15.5 in (394

mm) and 8 5/8in (220 mm) clearances and allow the

22 5/16 in (567 mm) dimension to float if necessary.

C10003

Fig. 6 -- Retrofit Installation Dimensions

If the alternative condensate drain location through the

bottom of the unit is used in conjunction with a retrofit

curb, the hole in the curb must be moved 12.5 in (320

mm) towards the end of the unit.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Remove all shipping materials and top skid. Remove extra

center post from the condenser end of the unit so that the

condenser end of the unit matches Fig. 16 -- 18. 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 using accessory CRDUCTCV001A00. To

convert to horizontal configuration, remove screws from side

duct opening covers and remove covers.

Discard the supply duct cover. Install accessory

CRDUCTCV001A00 to cover the vertical supply duct

opening. Use the return duct cover removed from the end

panel to cover the vertical return duct opening.

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.

C06108

Fig. 7 -- Horizontal Conversion Panels

50HCQD12

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. 8.)

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

to not damage any wiring. (See Fig. 9.)

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 9.

FILTER ACCESS PANEL

INDOOR COIL ACCESS PANEL

C10004

Fig. 8 -- Typical Access Panel Locations

Economizer

Cut Plastic Ties

(2) Places

Remove Hood Parts

C10005

Fig. 9 -- Economizer Wiring

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. 8.)

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

basepan and remove. In order to remove the screws, it

may be necessary to remove the panel underneath the

two--position damper. Remove the two screws. Locate

and cut the (2) plastic tie--wraps securing the

assembly to the damper. (See Fig. 10.) 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 9.

5. If removed, reattach the panel under the damper.

Hood Parts

Plastic Tie Wrap

Qty (2)

Screws for Metal Tray

Qty (2)

C10006

Fig. 10 -- Damper Assembly

50HCQD12

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. If the panel is still attached to the unit, re-

move the screws along the sides and bottom of the

panel. See Fig. 11.

SIDE

PANEL

INDOOR

COIL

ACCESS

PANEL

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

PANEL

RAIN DEFLECTORS

C10007

Fig. 11 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the

hood sides under the panel (hood top). Be careful not

to lift the panel too far as it might fall out. 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. 12.

TOP

PANEL

INDOOR COIL

ACCESS PANEL

SCREW

HOOD DIVIDER

LEFT

HOOD

SIDE

C10008

Fig. 12 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizer

barometric relief damper in place.

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

Fig. 12 and 13. Secure hood divider with 3 screws on

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

bottom filter rack for the aluminum filter.

5. Attach the post that separates the filters with the

screws provided.

6. Open the filter clips which are located underneath the

hood top. Insert the aluminum filters into the bottom

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

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

the filters into place. See Fig. 13.

7. Install the two rain deflectors on the edge of the hood

topasshowninFig.11.

DIVIDER

BAROMETRIC

RELIEF

CLEANABLE

ALUMINUM

FILTER

HOOD

FILTER

CLIP

OUTSIDE

AIR

C10009

Fig. 13 -- Economizer Filter Installation

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

and the hood top as shown in Fig. 11.

9. 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. 14. 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. 14 -- Condensate Drain Pan (Side View)

50HCQD12

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