McQuay THC02 Instruction Manual

Installation

Maintenance Manual

745

oup:

Fan-coil

Part

Number:

106333001

Date:

November

2009

Ceiling

Concealed

Fan-Coil

Unit

Models:

THC02,

THC03,

THC04,

THC06,

THC08,

THC10,

THC12

McQuay

International

Table of Contents

Installation ............................................................. 3

Receiving ............................................................... 3

Air duct connection ............................................... 4

Drain pipe connection............................................ 4

Pipe connection ..................................................... 4

Wiring .................................................................... 4

Maintenance........................................................... 4

General................................................................... 4

Monthly intervals................................................... 4

Wiring Diagrams ................................................5-6

Motor ...............................................................5

Control .............................................................6

Warranty Return Material Procedure..................... 7

Replacement Parts ................................................. 7

LimitedWarranty

Consult your local McQuay Representative for

warrantydetails.Referto Form933-43285Y. Tofind

your local McQuay Representative, go to

www.mcquay.com.

CAUTION

WARNING

Sharp

edges

and

coil

surfaces

are

injury

hazards.

Avoid

contact

with

them.

Moving

machinery

and

electrical

power

hazards

may

cause

severe

personal

injury

death.

Disconnect

and

lock

off

power

before

servicing

equipment.

NOTICE

Installation

and maintenance

be performed only by qualified personnel who

familiar

with

and in compliance

with

state, local and national codes and regulations, and experienced

with

this type

equipment.

745

Page

McQuay

International

Installation

Receiving

All units leaving the McQuay plant are inspected for quality

prior to shipment.

Carefully inspect all shipments immediatelyupon delivery. Note

visible damage on the carrier’s freight bill and request that the

carrier send a representative to inspect the damage. This may

be completed by telephone or in person, but should always be

confirmed in writing.

The shipment should be unpacked in the presence of the agent

so that the extent of the damage or loss can be determined. The

carrier’s agent will make an inspection report and a copy will

be given to the consignee for forwarding to the carrier with a

formal claim.

Unit

Installation

The unit is designed to be concealed in the ceiling. Installation

and maintenance should be performed by qualified personnel

who are familiar with local codes and regulations, and experi-

enced with this type of equipment.

There are holes on the top of the unit for hanging the unit above

the ceiling. Please refer to Figure 1. , Figure 2., and Figure 3.

NOTICE

Make

sure

the

top

the

unit

level

after

installation.

The

drain

pan

designed

with

little

gradient

facilitate

drainage.

Not

Level

Drain

Pan!

NOTICE

Before

installation

and

running

the

unit,

please

check

the

following:

Figure

Obstacle

There

must

enough

space

for

the

unit

installation

and

maintenance.

Please

refer

the

unit

outline

and

dimensions

Figure

1 for

the

minimum

distance

between

the

unit

and

obstacles.

B A C

Mount

with

the

lowest

moving

parts

least

feet

above

the

floor

grade

level.

Ensure

enough

space

for

piping

connection

and

electrical

wiring.

Leave

means

for

disconnection

from

the

electrical

supply

according

NEC

local

codes.

Check

whether

the

hanging

rods

can

support

the

weight

the

unit.

The

unit

must

installed

horizontally

for

proper

operation

and

condensate

draining.

Figure

Ceiling

8 in.

16 in.

Terminal

Block

The

exter

nal

static

pressure

must

within

the

allowable

static

pressure

range.

The

installing

contractor

must

supply

service

valves

and

insulation

for

water

piping

accordance

with

local

codes

and

regulations.

Ceiling

Discharge

Air

Return

Air

Ceiling

Access

Panel

with

Air

Return

prevent

strain

the

wire

connections,

use

either

conduit

approved

strain

relief

device.

10.

Confirm

that

the

power

has

been

switched

OFF

before

installing

servicing

the

unit.

Nut

Vibration

Isolator

Fan

Coil

Unit

Expansion

Screw

Hanging

Rod

Flat

Washer

Detail

745

Page

McQuay

International

Figure

Ceiling

Return

Air

Plenum

Pipe

Connection

Chilled

ter

Pipe

Connection

Connect chilled water pipes to the unit. The water inlet is on the

bottom and water outlet is on top.

Wiring

Wiring connection must be completed according to the wiring

diagram on the unit.

Discharge

Air

Return

Air

Return

Air

Grille

with

Filter

Expansion

Screw

The unit must be GROUNDED.

Installation of all field wiring must comply with NEC and

local codes.

Nut

Hanging

Rod

WARNING

Vibration

Isolator

Fan

Coil

Unit

Flat

Washer

means

for

disconnect

from

electrical

supply

shall

provided

according

NEC

local

codes.

Confirm

that

the

power

has

been

switched

OFF

before

installing

servicing

the

unit.

Air

Duct

Connection

Detail

Maintenance

General

Air ducts should be made of galvanized steel and

connected to the flange of the unit with a canvas connector.

Refer to the unit dimensions. Insert the duct into the flange and

fix with screws.

Duct connections must be installed in accordance with national

and local codes.

Drain

Pipe

Connection

Per

Local

Codes

The drain pipe can be PVC or steel. Connect the drain pipe to

the unit. Pipe insulation is recommended to avoid condensa-

tion. The suggested slope of the drain pipe is at least 1/8" per

foot, but local code will prevail. Refer to Figure 4 for typical

A good general maintenance plan will avoid performance loss

and unexpected shut-down of the equipment.

A dirty filter reducesair flow as well as unit performance. Chang-

ing or cleaning the filter is very important. Check the filter

monthly and replace or clean as required.

Coils should be cleaned of dust, dirt and lint with compressed

air or water. Theycan be vacuumedor brushed with asoft brush.

CAUTION

piping installation.

Figure

Return Ball Valve

Control Valve

Actuator

Water

coils

exposed

freezing

temperatures

should

drained

anti-freeze

should

added

the

water

circuit

avoid

freezing.

Monthly

inter

als

1. Inspect and clean the condensate drain pan to avoiding

clogging of drainage by dirt, dust, etc. Inspect drainage

piping for proper condensate flow.

2. Check and clean the coil. Clean the coil with a low pressure

water jet or low pressure air.

3. Clean and tighten all the wiring connections.

Supply Gate Valve

745

Page

McQuay

International

Dimensional

Data

–

THC

Horizontal

Concealed,

with

Plenum

Box

Filters

Unit

Size

Number

Fans

Size

Qty

S02

32.05"

17.64"

19.17"

19.96"

18.46"

" x 8" x 1"

S03

38.74"

24.33"

25.87"

26.65"

25.15"

" x 8" x 1"

S04

43.86"

29.45"

30.98"

31.77"

30.20"

" x 8" x 1"

S06

51.73"

37.32"

38.86"

39.65"

38.07"

" x 8" x 1"

S08

61.57"

47.17"

48.70"

49.49"

47.91"

" x 8" x 1"

S10

65.51"

51.10"

52.64"

53.43"

51.85"

" x 8" x 1"

S12

75.75"

61.34"

62.87"

63.66"

62.09"

" x 8" x 1"

FILTER

MOUNTING

HOLES

3/8"

5/8"

2.32"

7.36"

CONDENSATE

DRAIN

3/4" MPT

1.5"

3.38"

5.75"

AIR

VENT

TOP

VIEW

Plenum Back with Filter

1.02"

5.63"9.75"

FRONT

VIEW

1.40" CONDENSATE

DRAIN 3/4" MPT

FILTER

4-Pipe

System

2-Pipe

System

745

Page

McQuay

International

Wiring

Diagrams

Wiring

(115V/1P/60Hz)(208-230V/1P/60Hz)(265/277V/1P/60Hz)

For Models:

THCH02,

THCH03,

THCH04, and THCH06 For

Models:

THCH08,

THCH10,

THCH12

For Models:

THCH02,

THCH03,

THCH04, THCH06, THCH08,

THCH10,

THCH12 (WITH VOLTAGE TRANSFORMER)

Wiring

(115V/1P/60Hz) (208-230V/1P/60Hz)

(265/277V/1P/60Hz)

745

Page

McQuay

International

! !

Control

Wiring

Schematic

Heating/Cooling

2-Pipe

With

Automatic

Changeover

Control

Wiring

Schematic

Heating/Cooling

4-Pipe

With

Sequencing

Thermostat

745

Page

McQuay

International

This document contains the most current product information as of this printing. For the most up-to-date

product information, please go to

www.mcquay.com.

4900

echnology

Park

Boulevar

•

Auburn, New

ork

13021-9030

•

800-432-1342

•

www

.mcquay.com

745 Pg 8

McQuay

International

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