McQuay THR-060D Installation Manual

TABLE OF CONTENTS

INTRODUCTION

General Description . . . . . . . . . . . . . . . . . . . . . . . . . ...3

Nomenclature . . . . . . . . . . . . . . . . ., . ., . . . . . . . . . ...3

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3

INSTALLATION

Handling . ., ., . . . . . . . . . . . . . . ., . . . . . . . . . . . . . ...3

Moving The Unit, ., . .,,..,... . . . . . . . . . . . . . . . ...4

Location .,.....,........,.. ., . ., ., ., . . . . . . . ...4

Clearance Requirements ...,. . . . . . . . . . . . . . . . . ...4

Placing the Unit . ., ..,.,.... , . . . . . . . . . . . . . . . ...4

Vibration isolators,.,...,.,.. . . . . . . . . . . . . . . ...5.6

WATER PIPING

General . . . . . . . . . . . . . . . . . . . . . . ., . . . . . . . . . . . ...6

Evaporator Piping . ., ..,.,.... . .,.,......,....,.6

Evaporator Temperature Limits . ., . . . . . . . . . . . . . ...6

Flow Rate Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...7

Evaporator Pressure Drop Corrections . . . . . . . . . . ...7

Evaporator Pressure Drop Curve.... . ., . . . . . . . . ...7

CONDENSER WATER PIPING . . . . . . . . . . . . . . . . . . ...8

Condenser Temperature Limits . . . . . . . . . . . . . . . . ...8

Condenser Temperature Rise . . . . . . . . . . . . . . . . . ...8

Condenser Flow Rate Limits... . . . . . . . . . . . . . . . ...8

Condenser Water Arrangements . . . . . . . . . . . . . . . ...9

Condenser Pressure Drop Correction ., .,........,.9

Condenser Pressure Drop Curves . ., . . . . . . . . ...9. 10

TYPICAL PIPING DIAGRAMS., . . . . . . . . . . . . . . . . ...11

Water Quality . . . . . . . . . . . . . . . , . ., ., . ., . . . . . ...12

Condenser Water Thermostat .,, . . . . . . . . . . . . . ...12

Flow Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...12

Relief Valve Piping . . . . . . . . . . . . . . . . . . . . . . . . . ...13

DIMENSIONAL DATA . . . . . . . . . . . . . . . . . . . . .14.15.16

STARTUP&SHUTDOWN

Pre Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...45

Startup . . . . . . . . . . . . . . . . . . . . . . . . .,.,.....,.,.,45

Temporary Shutdown .,,.,... . . . . . . . . . . . . . . . ...45

Extended Shutdown .,,.,.... , . . . . . . . . . . . . . . ...46

Startup After Extended Shutdown ,, ., . . . . . . . . . ...46

SYSTEM MAINTENANCE

General ..,.,..,..,....,.,.. . . . . . . . . . . . . . . ...47

Control Center Service, .,..... . . . . . . . . . . . . . . ...47

Electrical Terminals.,....,.. ., ., . . . . . . . . . . . ...47

Compressor Oil Level, .,....,. . ., ., . . . . . . . . . ...47

Refrigerant Sightglass .,.,.... ., . . . . . . . . . . . . ...48

Lead-Lag . . . . . . . . . . . . . . . . . . . . . ., ., . . . . . . . . ...48

Crankcase Heaters .,, ..,..... . ., . ., ., . ., ..,...48

SYSTEM SERVICE

Filter-driers ., . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...49

Liquid Line Solenoid Valve.... , . . . . . . . . . . . . . . ...49

Thermostatic Expansion Valve, ...,.,.,. . .,.....,49

Evaporator, . . . . . . . . . . . . . . . . . .,,...,.,,..,.,.,50

Watercooled Condenser,..,.. ., ., ., . . . . . . . . ...50

IN-WARRANTY RETURN MATERIAL PROCEDURE

Compressor . ., .,, . . . . . . . . . . . . . . . . . . . . . . . . . ...50

Components Other Than Compressor . . . . . . . . . . ...51

APPENDIX

STANDARD CONTROLS:

Thermostat, . . . . . . . . . . . . . . . . . ., ..,.,.......,51

Oil Pressure Safety Control ., . ., . ., ., . ., ..,.,.51

Compressor Lockout ., . . . . . . . . . ., . . . . . . . . . ...52

High Pressure Control. .,...... . . . . . . . . . . . . ...52

Low Pressure Control .,.....,. . . . . . . . . . . . . ...52

Freezestat . . . . . . . . . . . . . . . . . . , ., . ., . . . . . . ...52

Compressor Motor Protector . . . . . . . . . . . . . . . ...53

PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . ...17.18

Compresor Locations . . . . . . . . . , . . . . . . . . . . . . . ...19

Contactor Designation . . . . . . . . . . . . . . . . . . . . . . ...19

Major Components . . . . . . . . . . . . . . . . . . . . . . . . . ...19

WIRING

Field Wiring, Power...,..,.. . . . . . . . . . . . . . . . ...20

Field Wiring, Control, . . . . . . . . . . . . . . . . . . . . . . . . ..2o

Interlock Wiring . . . . . . . . . . . . . . , . . . . . . . . . . ...20.21

Sequence of Operation . . . . . . . . ., . . . . . . . . ...22.23

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...24

Control Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...25

Electrical Legend . . . . . . . . . . . . . . . . . . . . . . . . . . ...26

Power Schematics . . . . . . . . . . . ,. ... . . . . . ..27—33

Control & Safety Schematics . . . . . . . . . . . . . . ...34.35

Thermostat Schematics . . . . . . . . . . . . . . . . . ..36—41

Electrical Schematic Drawing Decision Tables.42—44

Page2/lM377

OPTIONAL CONTROLS:

Part Winding Start, . . . . . . . . . . , . ., . ., ., ..,....53

Phase/VoltageMonitor., . . . . . . . . . . . . . . . . . . ...53

Alarm Bell . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . ...53

Low Source Water, . . . . . . . . . . , . . . . . . . . . . . . ...54

Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . . . . . ...54

CONTROLS, SETTINGS, & FUNCTIONS. ., . . . . . . ...55

TROUBLESHOOTING CHART,. . . . . . . . . . . . . . . . ...56

PRESSURE TEMPERATURE TABLE . . . . . . . . . . . ...57

—

INTRODUCTION

GENERAL

McQuay Type THR Templifier heat pump water heaters are
designed for indoor installations. Each unit is completely
assembled and factory wired before evacuation, charging and
testing. Each unit consists of multiple accessible hermetic
compressors, replaceable tube dual circuit shell-and-tube
evaporator, water cooled condenser, and complete refrigerant
piping.

Liquid line components that are included are manual liquid
line shutoff valves, charging valves, filter-driers, liquid line
solenoid valves, sightglass/moisture indicators, and dia­phragm element thermal expansion valves. Other features

NOMENCLATURE

THR-040 D-1

D;::+J

(Accessible Hermetic)

Nominal Capacity (Tons)

DESCRIPTION

include compressor discharge check valves, crankcase
heaters, recycling pumpdown during “on” or “off” seasons,
compressor lead-lag switch to alternate the compressor start­ing sequence, and sequenced starting of compressors.

The electrical control center includes all safety and
operating controls necessary for dependable automatic
operation.

Compressors are not fused, but may be protected by op-

tional circuit breakers, or may rely on the field installed
fused disconnect for protection.

Basic Unit With Single Water Cooled
Condenser Per Refrigerant Circuit

L

‘1

1 = R-22 Refrigerant, 130” F Max.
Leaving Water Temp.

INSPECTION

When the equipment is received, all items should be careful- be checked before unloading the unit to be sure that it agrees
Iy checked against the bill of lading to insure a complete ship­ment. All units should be carefully inspected for damage upon
arrival. All shipping damage should be reported to the car­rier and a claim should be filed. The unit serial plate should

with the power supply available. Physical damage to unit after
acceptance is not the responsibility of McQuay International.

Note: Unit shipping and operating weights are available in

the physical data table (pages 17 and 18).

INSTALLATION

Note: Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes
and regulations, and experienced with this type of equipment. Caution: Sharp edges are a potential injury hazard. Avoid
contact.

HANDLING

Every model THR Templifier heat pump is supplied with a full area since the refrigerant will displace the air. Avoid expos­refrigerant charge. For shipment the charge is contained in ing an open flame to refrigerant when moving the unit. Care
the condenser and is isolated by the manual condenser li- should be taken to avoid rough handling or shock due to drop­quid valve and the compressor discharge service valve. ping the unit.

Should the unit be damaged, allowing the refrigerant to other than the unit base, unit skid, or rigging holes in the
escape, there may be danger of suffocation in the equipment,
area since the refrigerant will displace the air. Avoid exposure

evaporator or condenser vessels.

Never lift, push or pull unit from anything

IM 377 I Page 3

MOVING THE UNIT

The McQuay Templifier heat pump is mounted on heavy
wooden skids to protect the unit from accidental damage and
to permit easy handling and moving.

It is recommended that all moving and handling be per­formed with the skids under the unit when possible and that
the skids not be removed until the unit is in the final location.

When moving the unit, dollies or simple rollers can be

used under the skids.

Never put the weight of the unit against the control box.

In moving, always apply pressure to the base on skids on­ly and not to the piping or shells, A long bar helps move the
unit easily. Avoid dropping the unit at the end of the roll.

If the unit must be hoisted, it is necessary to lift the unit
by attaching cables or chains at the lifting holes in the

evaporator tube sheets. Spreader bars must be used to pro­tect the control cabinet and other areas of the chiller (see

Figure 1).

Do not attach slings to piping or equipment. Move unit in
the upright horizontal position at all times. Set unit down gently
when lowering from the trucks or rollers.

Note: On unit sizes 120 through 170D, ordered with the op-

tional acoustical enclosure, there will be extension brackets
attached to the evaporator tube sheets. These brackets will
be used for hoisting the unit and should be removed when
unit is in place.

Figure 1.

I

Unit is designed for indoor application and must be located
in an area where the surrounding ambient temperatures are
40F or above,

Because of the electrical control devices, the units should
not be exposed to the weather. A plastic cover over the con­trol box is supplied as temporary ’protection during transfer.

SPACE REQUIREMENTS FOR CONNECTIONS AND SERVICING

The chilled water piping for all units enters and leaves the
evaporator from the rear, with the control box side being the
front side of the unit. (A clearance of 3 to 4 feet should be pro­vided for this piping and for replacing the filter-driers, for ser­vicing the solenoid valves, or for changing the compressors,
should it ever become necessary). Recommended service

clearances are shown in Figure 2.

The condenser water piping enters and leaves the shell
from the ends. Work space must be provided in case water
regulating valves are being used and for general servicing.

Clearance should be provided for cleaning condenser tubes
or for removing evaporator tubes on one end of the unit as
specified in Table 1. It is also necessary to leave a work area
on the end opposite that used for replacement of a cooler tube.

Table 1. Minimum recommended clearance requirements

B

A

961<

41“

I Minimum clearance required for removal and replacement of cooler tubes

(either end).

flJ 36,,

c

I 96” 0! 46 “

D

A B

120” @ 36 “ 120“ (u

LOCATION

A reasonably level and sufficiently strong floor is all that
is required for the Templifier heat pump. If necessary, addi­tional structural members should be provided to transfer the

weight of the unit to the nearest beams.

Note: Unit shippinq and operating weights are available in

the physical data’ table, pages 17 and I8

Figure 2. Clearance requirements

01

FRONT

cONTROL BOX

20

1

f

The small amount of vibration normally encountered with the
Templifier makes this unit particularly desirable for basement
or ground floor installations where the unit can be bolted
directly to the floor. The floor construction should be such that
the unit will not affect the building structure, or transmit noise
and vibration into the structure, See vibration isolator

Page 4 I IM 337

PLACING

THE UNIT

section for additional mountina information.

Note: On the THR 120D thru 170D, shipping bolts are used

to secure the compressor rails to the evaporator brackets.
Remove these and discard after unit is mounted and before
unit is started.

VIBRATION ISOLATORS

Rubber-in-shear or spring isolators can be furnished and field
placed under each corner of the package, It is recom­mended that a rubber-in-shear pad be used as the minimum
isolation on all upper level installations or areas in which vibra-

tion transmission is a consideration.

Transfer the unit as indicated under “Moving the Unit.” In
all cases, set the unit in place and level with a spirit level.
When spring type isolators are required, install springs run­ning under the main unit supports. Adjust spring type mount­ings so that upper housing clears lower housing by at least
1/4” and not more than 1/2”.A rubber anti-skid pad should be
used under isolators if hold-down bolts are not used.

Vibration eliminators in all water piping connected to the
Templifier are recommended to avoid straining the piping and
transmitting vibration and noise.

Table 2.

-----

Figure 3. Isolator Locations

REAR

= o Q

K 0

FRONT

CONTROL BOX

!5

Q

Table 3. Spring Flex Isolators

CP-1-25 Gray WI 1 Red Stripe
CP-1-26 Gray WI 2 White Stripes
CP-1-27 Gray WI 1 Orange Stripe
CP-1-28 Gray WI 1 Green Stripe
CP-1-31 Gray WI 2 Yellow Stripes 1100 0.63 7%
CP-2-26 Gray WI 2 White Stripes

CP-2-27 Gray WI 1 Orange Stripe 1500 1.06 1
CP-2-28 Gray WI 1 Green Stripe
CP-2-31 I Gray w/ 2 Yellow Stripes I 2200 I 0.83 IIOV. I 9Vz I 6
CP-4-27 I Gray w/ 1 orange Stripe I 3000 I 1.06 II ol/4 [ 9’/2 I 7’/2 I 5 ] 6% ] 886-58051 3A-27

450 1.22 71/z
600 1.17 ?kJ
750 1.06 71/2

900 1.02 i’~/2

1200 1,17 I ol/4

1800 1.02 1ol/4

6V2 5
6VZ 5
6VZ 5
6VZ 5
6V2 5
9Vi 6

ov4

9v4 8
91/2 8

23h 5y8 886-477927A-25
23h 57/s 886-477927A-26
23h 5778 886-477927A-27
23,4 57/8 886-477927A-28
23h 578 886-477927A-31
23h 5y~

23h 5778 866-477929A-27
23h 5778 886-477929A-28

] 23A I 578 I 866-477929A-31

888-477929A-26

Figure 4. Spring Flex Mountings

wc/2y

ADJUST MOUNTING S0 UPPER

HOUSING CLEARS LOWER HOUSING

BY AT LEAST I 16’ AND NOT MORE
THAN I 2

\

w

\

ACOUSTICAL NON. SKID
NEOPRENE PAD

1

I 2 DIA

POSITIONING PIN

r–

E

ivJ_

1

4!

\

I

IM 377 I Page 5

Table 4. Rubber-in-Shear Isolators

Figure 5. Single Rubber-in-Shear

Mounting

-D DIA

,-0- DIA.

‘Os’’’O”’”’ w--A--

a

WATER PIPING

Since regional piping practices vary considerably, local or­dinances and practices will govern the selection and installa­tion of piping. In all cases local building and safety codes and
ordinances should be studied and complied with.

All piping should be installed and supported to prevent the
unit connections from bearing any strain or weight of the
system piping.

Vibration eliminators in all water piping connected to the
unit are recommended to avoid straining the piping and
transmitting pump noise and vibration to the building
structure.

It is recommended that temperature and pressure indicators
be installed within 3 feet of the inlet and outlet of the shells

to aid in the normal checking and servicing of the unit.

A strainer or some means of removing foreign matter from

EVAPORATOR PIPING

The water flow entering the evaporator must always be on the

end nearest the expansion valves and evaporator refrigerant
piping connections to assure proper expansion valve opera-

tion and unit capacity (see pages 14 thru 16).

Design the piping so that it has a minimum number of
changes in elevation. Include manual or automatic vent valves
at the high points of the chilled water piping, so that air can
be vented from the water circuit, System pressures can be

GENERAL

the water before it enters the unit or the pump is recom-

mended. It should be placed far enough upstream to prevent

cavitation at the pump inlet (consult pump manufacturer for

recommendations). The use of a strainer will prolong pump

and unit life and thus keep system performance up.

A preliminary leak check of the water piping should be

made before filling the system.

Shutoff valves should be provided at the unit so that nor­mal servicing can be accomplished without draining the
system.

A water flow switch or pressure differential switch must
be mounted in the water lines to the evaporator and the
condenser to verify water flow before unit is permitted to
start.

maintained by using an expansion tank or a combination
pressure relief and reducing valve.

All chilled water piping should be insulated to prevent con-

densation on the lines. If insulation is not of the self-contained

vapor barrier type, it should be covered with a vapor seal.

Piping should not be insulated until completely leak tested.

Vent and drain connections must extend beyond pro-

posed insulation thickness

for accessibility.

Page 6 I IM 377

EVAPORATOR TEMPERATURE LIMITS

EVAPORATOR FLOW RATE LIMITS–GPM*

Table 6.

THR

UNIT

SIZE

040D

0500
0600
0700
080D

0900
1000

1100

1200
t30D
1400

1500

1600
1700

‘ Water flows are basedon 10 FPS for max. flow and3 FPS formin, flow.

CHILLER WATER FLOW *

MAX.

230
244
316
312
352
352
370
460
403
463
463
439
579

579

MIN.

31
34
45
47
44
44
54
68
50
67
67
41
93
93

EVAPORATOR

MODEL

NUMBER

E-1008-2
E-1OO8-1
E-1208-3
E-1208-2
E-1208-1
E-1208-1
E-1408-2
E-1408-1
E-141 O-2
E-141 O-1
E-141 O-1
E-161 O-3
E-161 O-1
E-161 O-1

EVAPORATOR PRESSURE DROP CORRECTION

EVAPORATOR PRESSURE DROP CURVE

NOTE: Maximum allowable evaporator water pressure is 175 psig

WATER FLOW –GPM

lM3771Page7

CONDENSER WATER PIPING

THR condensers have factory manifolds for single inlet and
outlet connections. Water flow may be 2-pass parallel, 4-pass

parallel or 8-pass series/parallel to suit the application, Refer
to Figure 6 to determine condenser water circuiting arrange­ment. For proper performance, the condenser water must
enter the bottom connection of the condenser on all circuiting
arrangements.

Condenser water pressure drop for the unit should be

measured at the common inlet and outlet pipe, through a port

provided by the installing contractor. All pressure drop mea­surements should be made with the same gauge to insure
an accurate reading, Before the pressure drop curves can be
read, the pressure drop values on the curve must be corrected
based on the average hot condenser water temperature. The

correction factor can be obtained from page 9, and then

multiplied by the values on the pressure drop curves to ad­just them according to the average water temperature in the
system.

CONDENSER TEMPERATURE LIMITS

Table 7. Condenser temperature limits, operating and maximum ( 0F)

!,

UNIT SERIES

REFRIGERANT

TW%

OPERATING MAX. ALLOWABLE

MAX. LEAVING

WATERTEMP.

WATERTEMP, IN CONDENSER

(“F) (“F)

I

Note: Water flowlng through the condenser should never exceed the maximum allowable

temperature in the table above even when the urmt IS not operating.

1

R-22

I

I

130

I

145

I

CONDENSER TEMPERATURE RISE

Table 8. Allowable condenser temperature rise applicable to refrige

!rant 22

Note: Temperature rise for various water circuit arrangements may for a given

load be limited by the maximum or minimum flow hsted in the unit condenser
and evaporator flow Iimlt tables. The flow Iimlts for a given unit should be used
to calculate the temperature rise limit before a water circuiting arrangement
and temperature rise are established.

CONDENSER FLOW RATE LIMITS

Table 9. Unit Condenser Water Flow Limits (GPM)*

060D

070D
080D
090D

100D

I1OD 508
1200 440 56

130D 506 64 260 32

\

140D 506 64 260 32
150D 610 80

1600 610
170D 610

‘Values shown are total unit flow AdJust flow per condenser to meet flow requirement for flow arrangement being used

252 32 126 16 63 8
316

360
444 56

444

40
44

56
62

80

80

158
180 22 90

222
222

254
224

305
305

305

20 79 10

28 111 14
28 111 14

31 130
28 112 14

40 150
40 150 20

40 150

130 16
130 16

11

16

20

20

Page 8 I IM 377

Figure 6. Condenser Water Arrangements.

2-Pass Parallel

m

OUT

IN

NOTE: When parallel circuiting is used, design leaving condenser water temperature may not be obtainable unless both condenser circuits

are in operation.

IN

4-Pass Parallel

w

OUT

8-Pass Series/Parallel

-

OUT

IN

CONDENSER PRESSURE DROP CORRECTION

10

#

09

2E
W;

:: O*

J

~$
m

z% o,
gg

0
u

w

CONDENSER PRESSURE DROP CURVES

NOTE: Maximum allowable condenser water pressure is 250 psig.

2-Pass Parallel Flow (Standard Arrangement).

k
t

n

o

K
n

u

a

:

m
u
K
n.

a
w
1-

S

110 130 lwl

AVERAGECONDENSERWATERTEMPERATURE

170 193 210

230 253

WATER FLOW – GPM

IM 3771 Page 9

4-Pass Parallel Flow (Alternate Arrangement).

.

8-Pass Series/Parallel Flow (Alternate Arrangement).

WATERFLOW– GPM

Page 10 / IM 377

WATERFLOW— GPM

TYPICAL PIPING DIAGRAMS

HEAT RECOVERY

FROM WASTE FLUlO

I

WASTE

HEAT

SOURCE

up ORAIN1

HEAT
LOAD

FROM WATER TO AIR HEAT PUMP SOURCE

SUPPLEMENTARY
CLOSEOCIRCUIT
COOLER

HEAT RECOVERY

P

1=

--------

I

USEFUL

HEAT
LOAO

J

------ -.
TEMPLIFIER

L

-

SUPPLEMENTARY

HEATER

SOLAR HEAT SOURCE

COLLECTOR

ARRAY

I

TANK

i i

I_/

USEFUI

HEAT
LOAD

WITH INTERMITTENT WATER FLOW

HEAT OUTPUT

(SERVICEHOT WATERI

OUTPUT

140° F

TEMPLIFIER

t

STORAGE

TANK

<140”C

t- STANOBY

I

OR

AUXILIARY

I I

A

140°F

P

I

I 1(T

I
L--------J

f

b

HEAT

SOURCE

TEMPLIFIER

CIRCULATOR

L

,r HEAT

HEAT RECOVERY

FROM GAS OR AIR SOURCE

------ _
r
I

i
1

- ----.- .I

EXHAUSTAIR

NOTES: Valves, drains, vents, expansion tanks and instrumentation must be added in accordance with good piping practice.

Temperatures, where shown, are for illustration only.
These are typical Templifier application possibilities shown in schematic way. Each specific application will vary in the use of storage, supplemental heat, etc.,
to suit the job characteristics

WASTE HEATCONVERSIONUNIT

#
I

4

150°F

170”F *

L------ ----

-------. ~

TEMPLIFIER

FROM PARTIAL SOURCE FLUIO FLOW

HEAT RECOVERY

-------

!~~

—EVAPORATOR-

I
I

CONDENSER!

L

--..-.-

1+=

TEMPLIFIER

USEFUL

1

TOWEROR CLOSEO

CIRCUITCOOLER

IM 377 I Page 11

WATER QUALITY

The water flowing through the condenser and evaporator must

be of suitable quality for use with standard materials of
construction:

Condenser: Steel heads and tube sheets,

rubber gaskets, copper tubes.

Evaporator: Steel shell, copper tubes,

polypropylene baffles

Any additives that may be harmful should not be used.

quality may deteriorate later, an intermediate heat exchanger
is recommended, Plate type exchangers should be considered
for minimum temperature approach at economical cost.

Note: If cooling”tower or other source water containing dirt,
sediment or other foreign matter is used, assure that take-offs
to the Templifier are at the top of horizontal pipelines to mini­mize foreign matter getting into the evaporator. Depending
on water conditions, dual strainers and/or a settling drum
should be considered.

Where water or other fluids of unsuitable quality, or where

CONDENSER WATER THERMOSTAT

On units THR-040D thru 170D units, the condenser water ther­mostat (CP1) is mounted inside the control console. The con-

ever be removed from the well for servicing, care should be

taken as not to wipe off the heat conducting compound sup­trol sensor is mounted in a well, located in the condenser plied in the well.
water inlet manifold. Care should be taken not to damage the
sensor cable or leadwires when working around the unit. It

is also advisable to check the leadwire before running the
unit to be sure that it is firmly anchored and not rubbing on

the frame or any other component, Should the sensor

Figure 7. Thermostat Well Installation

Note: See page 51 for additional thermostat information.

Caution: The thermostat bulb should not be exposed to

water temperatures above those listed in the condenser water
temperature limit Table 7.

EVA

INLET

The water flow switches must be mounted in either the
entering or leaving water lines to insure that there will

INSTALLED

FLOW SWITCHES

be ade­quate water flow and load to the evaporator and condenser
before the unit can start. This will safeguard against liquid

refrigerant entering the compressors on startup. It also serves
to shut down the unit in the event that water flow is interrupted
to guard against evaporator freeze-up.

A flow switch is available from McQuay under ordering
number 175033 B-00. It is a “paddle” type switch and adap­table to any pipe size from 1“ to 6“ nominal. Certain minimum
flow rates are required to close the switch and are listed in
Table 10. Installation should be as shown in Figure 8. Elec­trical connections in the unit control center should be made
at terminals 5 and 6. The normally open contacts of the flow
switch should be wired between these two terminals. There
is also a set of normally closed contacts on the switch that
could be used for an indicator light or an alarm to indicate
when a “no flow” condition exists.

1. Apply pipe sealing compound to only the threads of the

switch and screw unit into D“x D“x1” reducing tee (see

Figure 8). The flow arrow must be pointed in the correct

direction.

2. Piping should provide a straight length before and after

R

the flow switch of at least five times the pipe diameter.

3. Trim flow switch paddle if needed to fit the pipe diameter.
Make sure paddle does not hang up in pipe.

Caution: Make sure the arrow on the side of the switch is
pointed in the proper direction of flow.

The flow switch is
designed to handle the control voltage and should be con­nected according to the wiring diagram (see wiring diagram
inside control box door).

Table 10. Flow Switch Minimum Flow Rates

NOMINAL PIPE SIZE MINIMUM REQUIRED FLOW TO

(INCHES) ACTIVATESWITCH (GPM)

1 6.00
11A

I 1/2
2 18.80

21/2

3

A

5
6

I

9.80

12.70

24.30

30.00

39.7C

-. .

58.70
79,20

Page 12 I IM 377

Figure 8.

FLOW SWITCH

PADDLE

FLOW SWITCH

*

1“2,,

VIEW FROM END OF EVAPORATOR/CONDENSER

--

m

PIPE

-EF;?’ )

~ FLOW3

w

STRAIGHT PIPE
FOR AT LEAST 5D”

Y

The ANSI/ASHRAE Standard 15-1978 specifies that pressure
relief valves on vessels containing Group 1 refrigerants (R-22)
“shall discharge to the atmosphere at a location not less than
15 feet above the adjoining ground level and not less than
20 feet from any window, ventilation opening or exit in any
building.” The piping must be provided with a rain cap at the
outside terminating point and a drain at the low point on the
vent piping to prevent water buildup on the atmospheric side

of the relief valve. In addition, a flexible pipe section should

be installed in the line to eliminate any piping stress on the
relief valve(s).

Figure 9. Relief Valve Piping

rl

f“’”

I

‘EI %%’:,w%’on

I ;~;~ble to relief

~:

c:

‘;

c

66

3“

Wall

Rain Cap

“eeve&Vent

Pitch !O
Outside OUTSIDE

[r

WALL

15 Ft. Min.
Clearance
To Ground

Level (See

Adjacent

Information)

RELIEF VALVE PIPING

The size of the discharge pipe from the pressure relief valve
shall not be less than the size of the pressure relief outlet.
When two or more vessels are piped together, the common
header and piping to the atmosphere shall not be less than

the sum of the area of the relief valve outlets connected to
the header. Fittings should be provided to permit vent piping
to be easily disconnected for inspection or replacement of the

relief valve.

Note: Provide adequate fittings in piping to permit repair or

replacement of relief valve.

Refrigerant
Condenser

[1

/

3/8” N.P.T

Inlet

RELIEF VALVE
(SET AT 450 PSI)

Outlet

IM 377 / Page 13

Figure 10. THR-040D thru 11 OD, 2-pass parallel.

‘i- I ‘-w:’”’

29 ~

DIMENSIONAL DATA

— L—

I %4 MOUI{TIIIG HOLES -1 k7vz

7,,8 DIA

b IEVLP03LTOR

w,i TER !PILET)

~ fl:~CTATOR

f

. . .

—90 7/8

– POWER

I 1

k“

A [EVAPORATOR

4

--F

wIRING
CONNECTION

I?; OUIRED
FOR TUBE
REMO$IAL
EITHER
END

!

u

I

I

WATER OUTLET)

de

h

Table 11. THR-040D thru 11 OD, 2-pass parallel.

THR

MODEL

N&

O@

0500

060D
070D
0s00
OSOD
100D

11OD

Ficrure 11. THR-120D thru 170D, 2-pass parallel.

Recommended

t-36”–

lFOr ‘“W’””’

“D” Evaporator _

Water Corm

MAX. OVERALL

DIMENSIONS

L

125% 34

125%

125?4 34
125% 34
125% 34
127
127

127

— 34” ~46°

\

w

34

34 65?4
34
34

EVAP. WATER CONN.

A

H

621/4 23h
621/4
633~
633A
633A

661/4
661/4

IClearance” ‘

—

23A
31/2
31/2
31/2

31/2

51/2
51/2

H

(VIcTAULtC)

c

23%
23~8
24V8
24T/o
24VB

261/2

271~
271~

1] Door SwIna

e

r

‘f

P“ Victaul,c

Top Outlet

Bottom Inlet

---E

CONDENSER WATER

CONNECTIONS (VICTAULlc) ~

D

4
4

E “F

65/8
65A
65/8

5

65/8

5

6%

5

71/2

5

71/2

6

71/2

6

Q&31fl,.--j

\

11~*
11~8
lly~
llye
lly*
131A
131/s
13%

x-Ae

J

Q

11~/2

17%

111/2

171h

I I 1/2

171~

111/2

171/E

I I 1/2

171/E
161/4

12y8

161/4

12y8

161/4

123/8

~ Ind(cator L,ghts

/

. . . . . . . . .

~ u:

P

283/3 561/k

3

28% 58%

3

28% 59% 43

3

26~8 59% 43

3

28% 59% 43

3

293A 61 1/>

4

29% 62%

4

29% 62%

4

1517A ~’’””l

D

Power Wlrlng
ConnectIons

CENTER, OFWWWTY

‘

“x

4278 23
42~8 23

431/2

4378 28
433~

y ‘ “z

251/3
251A
25%
27V8 13

28

i

\

13
13

123A
123~
123A

I 25h
125/8

Requ,red For

ube Removal

E,ther End

I

I

t

L..

27A -

Tabie 12. THR-120D thru 170D, 2-pass parallel.

34 77
34
34
34 77

77
77

160D

160D
170D

Page 14 I IM 377

1517*
1517~
151y~
151T/~

EVAP. WATER CONN.

3131A

51/2

51/2
51/2

51/2

3131/4
3131/4

301/4

6

6
6

6

Evaporator

‘AL

Water Inlet

1

I

CONDENSER WATER

131/Is

77A 6

131/16

7~16

13~h6

7~16

131/Is

7YIS

109A6

109/16

10%6

10%6

@

167/,s 4
167/,6 4
167/,6 4
167/,,3 4

~ A fi::~:;e,

163/4

l-/-

CENTER OF

@liWITY .’

,

P x y z

293~
293A
293~
293A

561/3
56%

561/2

561/4

32V8
32%

331/4

337/2

131/2
131/2

13ye

13y8

Figure 12. THR-040D thru 110D, 4-paas parallel.

36­RECOMMENDED
FOR SERVICING

D

EVAPORATOR
WATER
CONNECTION

1

\

SI 1111/ II (iTls”s’DE1

I

&3’1

L–

1.

-1

2 3/4 -

MAX. OVERALL

DIMENSIONS

L

124% I 34
124% I 34
124% ] 34

124%4
124% 34
125% 34
125% 34
125% 34

MO UN T:NG HOLES

Table 13. THR-040D thru 110D, 4-pass parallel.

,THR

k

. . .

T- l\L

29+

r

?49

w

34

H

621A
621/4

I

633A 31/2

&j3~

633A
65%

661/4

661/4 51/2

F

II

E

BOTTOM

‘.

...-

EVAP. WATER CONN.

(WCTAULIC)

A

23A
23~

31/2
31/2
31/2
51/2

c D

23Y8 4
23%
24~B

24~a
24Y8

261/2
271~

271~

TO. Ou

P

‘LET

INLET

4 7%

4

5 72/~
5
5 8
6
6 8

I

irD=r

1

E F

73/4

I

73/3

778 11~~

8

. . .

nn

=lnrz

IIL‘i%

r

CONDENSER WATER

CONNECTIONS (VICTAULIC)

111/s

111A

111/s

111A

I 21/2 gl~
121/2

121/2 914

ka

— 4 UOUNT’NG HOLLS J~

7/8 31A

1-1

r---

—Y<e

G

81/4
61A
61/4

al~

81/4

91/4

/

—90 7/8

J

1578
157/,
157/8
157/8

157/8
1478 3
14y8 3

14T/~ 3

I

EVLDORb TOP 4-’

CO I:DF!SEP

I I

P

21/2

271/2

21/2

271/2

21/2

271/2

21/2 271/2

21/2

271/,
281/2
281/2
281/2

-/

T-l n r

LJ[. ”-

<oUT.

,1

--ill

--/

t-

CENTER OF

y

2514
251k
251~
27Ye 13

26

581~

42S~ 23

581~

425~ 23
59y* 43
595A 43
59y* 43

61 1/2 431/2
621A

437/, 28

433A

621A

x

-P OWFI?
WIRING
c01it4Fc Tlotl

1)

c’

b7

GRAV!W.

!3

,..’;J;:F

13
13

lz3~
123A

123~

123/8
125h

1

,’::

Figure 13. THR-120Dthru 170 D,4-passparalleI.

— 46,,

Door SW,ng

i

Clearance

D,, Evaporamr

walercm”

:@

T

Y

I

,

Control Con.
% Knockout ,7

I

I

I

L

lanleter

Holes

l-z+

Table 14. THR-120D thru 170D, 4-pass parallel,

THR

>

MODEL

NO.
1201J 15u12
1300

!

140D

D

wor
160D

170D

MAXIMUM OVERALL

I

DIMENSIONS

L w H A c o

# .. -.,.

150Yz I

!

1501/2]~

1

1501/z I 34

I

i501/z I

I

1501/2 34

34

!

I

34

I

34

34

EVAP. WATER CONN.

1
I

51/2

77

I

51/2 3131,4

77

51/2

77

51/2

77

51/2 301~

77

I

5 1/,

77

----- ,.w

P Vlcla”l,c
ToDOu!lel ­Bottom Inlet

(VICTAULIC)

30 1/4

I

3r31A

3(31/4

q(l

1/”

I

150%

Ind,cator L,ghls

. . . . . .

I

\

I +1 4“-—.-~

I- T+... __

1

‘AL

Evaporator
Wz!er Inlet

11413/,, –-

0

CONDENSER WATER

CONNECTIONS (WCTAULIC

F F n .1

1 I !

127A6

8

I

8 12fi6

127A6

8

8 127/4~

8 127/, ~

8I127/,6

71/2

151/& I

71/2

151/s

71/2

151~

71/2

151A

77/2

151/s

71/2

151/s

I

I

I I

$ 1

I I

h!:.m

3

203/,

3

205A

3 203/~

3

203/8

!

3

2os~

1

557/*

561A 32VB
56~B

561/2

I

561/4 331/2

1

I

I R

1

I

m

6

I

6
6

6

6

!

I

–~ 120 -

Req., red For

“be Remov:

.p.aporatm

~

--4

325h

32V8

331~

Erlher End

waler

I

1

131/2
131/2

133h

133/4

I I

(

k16,4-–

CENTER OF ..+ “]

35,%

outlet

31/2

I

I

I

IM 377 I Page 15

Figure 14. THR-040Dthru 11OD, 8-pass series/parallel.

L7/yiiR$’:LEs,o,/

‘“”NT’NGH”LESJ++] ‘-,,,,:

Lz4e

Table 15. THR-040Dthru 11OD, 8-pass series/parallel.

.-rrn

7 !/2

4

A (EVAPORATOR

J~

—T

e

WATER OUTLETI

Fiaure15. THR-120Dthru 170 D,8-pass series/parallel.

_

l==

1

Q~,-

Door Sw,ng
Clearance

- 3%

~

Control Con.
~%,,Knockout

/

1

p,, V,claullc

77

Too Outlet

BotlomInlet

*36+ _. 3--
Recommended

For Sermng

,,D ~

Waler

I

Lz -/

L

T Ind!calor L,ahts

I V’”””””:, I

3 D

Power W,r(ng
Connections ~

Evaporator

‘AL

Waler Inlet

‘1

~o,A+ --

L——- x –– ---J

114>%-

0

L6:~fi~r~fi”

120--+

Mequired For

Tube Flemoval

E(lher End

Page 16 / IM 377

PHYSICAL DATA

Table 17. THR-040D thru 11 OD

~ UNIT SIZE

Nominal Horsepower
Number
Speed RPM (60 Hz/50
No. of Cylindera
Oil Charge (Oz.)
Discharge Line Size (In.)

Number 2 2 2
Diameter (In,)
Tube Length (In.) 96 I 96
Design W.P, (PSIG):

Refrigerant Side
Water Side

I Rc,l,.nfl=, ore

Purge Valve Flare
Liquid Subcooler

No. Water Passes
Pump-Out Capacity 0

I

Connections:

Water inlet&Outlet (Victaulic)l 2V2

P

No. Water Passes

Pump-Out Capacity @

I

Connections:

Water Inlet & Outlet (Victaulic)

Water Passes@

No.

Pump-Out Capacity 0 130

Hz) _

I

20 ] 25

1],

040D

0500

25 I 25 30 35 35 35

1 1

1750/1 450 1750/1 450 1750/ 1450

4

I 4

136 136 136 I 1:

I

11A 11/2

8Y8 85/8 8%

4 4 4 6 6

36

11A 1ye 1yo

11A

85/8 878

96 I 96 96 [ 96 96 I 96

450 450

I

I

250

1/,

Y4 & ~/2

I

I

250

1/..

1/4 & J/2

Integral Integral Integral Integral Integral

2 I 2 I 2 12 I 2 / 2 I 2 I 2 I 2 I 2 I 2 I 2 I 2 12 I 2 I .2

I

130 130

I
I

41414 41414/4 4 14 I 4 14 14 I 4 I 4 14 I 4

I

130

I

2V2

4 4

130

130 125

21/2 21/2 21/2 21/2 21/2

130 130

21/2 27/2

130

21/2

4 4 14 14 14 I 4 I 4 14 I 4 I 4 14 I 4

130 130

130

060D

070D

080D

G60D

I

1OOD

I

cOMPRESSORS

40 40 50 50 50

1 1 1

152 160

1750/ 1450

160 160

1% 1ye

1 1 1 1

1

1750 II 450

6 6 6 8 8 8

242

1ye

1750/ 1450 1750/

242

260

260 260

1% 1yeI1ye 1ye 1yeI1ye

1

CONDENSERS

2 2

85~ 6Y8 85/, 85/3 85A

96 ] 96 96 ] 96 96 I 96

450 450 450 450 450 450
250 250 250

1/,

I

I

J14 & V2

I v?

~/4 & ~/2

I

I v, I v? I

Y4 & J/2

I

2.PASS ARRANGEMENT

125 116 116

21/2 21/2

109 199 199

109

21/21 3 I 3 I 3 I 3

21/2

4-PASSARRANGEMENT

125 125 116 116 109

21/2 21/2 21/2

21/2

109 199

21/2 21/2 I 3 I 3

2 2 2

103A 103/4

103A

250

I

250 I 250

I

Y4 & ~/2

Integral

!

7/4 & 3/2

Integral

188

199 166

313/3 3

8-PASSARRANGEMENT

125 125 116 116 109 109

199 199 166 188 166 188

1100

I

60 60 I 60

1 1 1

1750/1 450

1450

8 618

260 260

lf33~

v, I v? I

166 168

186

103A 103~

96 ! 96

J/a & 7/2

1

Integral

3 3

188 188

4

260

15h

I

186

4

I

Water inlet&Outlet (Victaulic) I 2 21212121212 121212

EVAPORATOR

Refrigerant Circuits

No.

Diameter (In.)
Tube Length (In.)
Water Volume (Gallons)

Refrigerant Side D.W.P. (PSIG)
Water Side D.W.P. (PSIG)
Water Connections:

Inlet & Outlet (NPT EXT.)
Drain & Vent (NPT INT.)

2 2 2

103,4

lo3~

lz3~

96 96 96

20.6 17.9 26.0
225

225

225

175 175 175

4

%

4

=/8

5 5 5

%

DlMENSIONS– 2-PASS

Length (In,)

Width (In,)

Height (In.)

3/i

125

125%

34 34 34

&J1/4 &.1/4 ss3~

125?4

DlMENSiONS– 4-PASS

Length (In,)
Width (In,)
Height (In.)

124%

34

szl/4

124?4

34

Gzl/4

124%

34

Gs3~

DIMENSIONS– 6-PASS

Length (In.)
Wdth (In,)
Height (In,)

1167/s 116VS

34 34 34
621/4 621/4

1167/s 1167/s

Gs3~

WEIGHTS—2-& 4-PASS

Operating Weight (Lbs.)
Shipping Weight (Lbs.)
Operating Charge Lbs. R-22

&

Operating Weight (Lbs.)

I

Shipping Weight (Lbs.)
Operating Charge Lbs. R-22

NOTES:
@ 60Vo Full refrigerant at90° F.
@ 8-Pass Series/Parallel Arrangement.

3655 3705

I

3655

I

40 I 50 I 50 I 50 150 160 I 60 I 60

3635 3665

I

3635 3695 3895

I

3735

40 I 50 I 50 ] 50 I 50 I 60 I 60 I 60

3995 4065 4240
3935

WEIGHTS-8-PASS

3955

21/2 21/2 21/2 21/2 21/2I21/2

2 2

1 z3~

lZ3~

2 2

1 z3~

96 96 96 96

25,6 24.3 24.3 30.5

225

225

175 175

225 225

175

5 6 6

3/8 % =/8 %

125% 125%

34 34

6? 3/4

633A

12434 124%

34

&,3~

34 34 34

Gs3~

1167/8

127 127

34

655A

125% 125%

65%

117% 1171~

34 34 34 34

Gs3~ ss3~

655/3

4675

4025 4185

4690

65 I 65 I 70 I 70 [ 60 I 60 I 60 I 60

4045

4200

3965 4045

4715
4630

5255
5115

65 I 65 70 I 70 60 I 80

14

175

34

~~l/d

sG1/4

GG1/4

5315
5175

2

14

96

27.6
225

175

%

127

34

fjfjlfi

125?4

34

&jl/4

117%

34

GG1/4

5465
5325

5405
5265

60 I 80

Table 18. WHR-120D thru 170D.

UNIT SIZE

120D

1

130D 140D

COMPRESSORS

Nominal Horsepower
Number
Speed RPM (60 Hz/50 Hz)
No. of Cylinders
Oil Charge (Oz.)
Discharge Line Size (In.)

Number
Diameter (In,)

Tube Length (In.)

Design W.P, (PSIG):

Refrigerant Side

Water Side
Relief Flare
Purge Valve Flare
Liquid Subcooler Integral

No. Water Passes
PumpOut Capacity 0
Connections:

Water Inlet & Outlet (Victaulic)

No. Water Passes
Pump-Out Capacity @ I 250.0

I

Connections:

Water Inlet & Outlet (Victaulic)

160/1 36 160/136 160/1 36 160/1 60 160/1 60

I

I

I

35/25 35/25 35/25

2 2 2 2

1750/ 1450

6/4 6/4 614

1%111A 1y*ll 1/3 12/8/11A

2 2

103~ liJ3~ lrJ3~ 1133~

120 120 120

450 450 450
250 250 250

% 5/8

V4 & V2

2 2 2

250.0 250.0

4 4 4

4 4 4

3 3 3

2-PASS ARRAN QEMENT

238.6 238.6 238.6 236.6

4-PASS ARRANGEMENT

250,0 238,6

35135 35135 35/35 35/35 35/40

2 2

1750/1 450

6/6

1yJl 1A

CONDENSERS

120 120

V4 & V2 V4 & V2

Integral

2 2

4 4 4

4 4 4 4 4

238,6 236,6 236.

3 3 3 3 3 3

1750/ 1450 1750/ 1450

6/6 6/6 6/6 6/6 6/6

160/1 60 160/160 160/242

1%/1 ye

13/Jl Ya

2

1034 103~ f 03~ I03/4

1133~

I

120 120 120

5/8

Integral Integral Integral

2 2 2 2

6 219.2 219.2

S-PASS ARRANGEMENT

No. Water Passes@
PumpOut Capacity @ 250.0 250.0
Connections:

Water Inlet & Outlet (Victaulic)

No. Refrigerant Circuits
Diameter (In,)
Tube Length (In.)
Water Volume (Gallons) 38.2 36.1 36.1
Refrigerant Side D.W.P. (PSIG)
Water Side D.W.P. (PSIG)
Water Connections:

Inlet & Outlet (NPT EXT.) 6 6 6
Drain & Vent (NPT INT.)

Length (In.)
Width (In,)
Height (In.) 77 77

t nla*EM@lnNe

Length (In.)

Width (In,)

Mainht (In 1 77 77 77 77 77 77

,,“, =,!. ,, !!.,

4 4 4

I

21/2

2 2 2

14 14 14

120 120 120

225 225 225

175 175 175

% %

1517/~ 1517/8

I

34 34 34

I

150% t501/2 150Vz

34 34 34

,,

1

238.6 236.6 238.6 238.6 219.2

21/2 21/2

DIMENSIONS - 2-PASS

“,!wE,.e,”$.” — .rr””!

1

4 4 4

21/2 21/2

EVAPORATOR

,,

1

21/2

3/8

151y~ 1517/8

77

I

A-CI&~s

,,

DIMENSIONS - 8-PASS

Length (In.)

Width (In,)
Height (In,)

142s%

I

34 34 34
77 77 77

I

14234

142% 142%

WEIGHTS -2 & 4 PASS

Operating Weight (Lbs.)
Shipping Weight (Lbs.) 6160 6335

Operating Charge Lbs. R-22

6370 6525

100 100 105

110 110 110

6600 6940 7290

6410 6775 6990

WEIGHTS -6 PASS

Operating Weight (Lbs.) 6330 6485

Shipping Weight (Lbs.) 6140 6295

Operating Charge Lbs. R-22 100 100

NOTES:
0 60°/0 Full refrigerant at 90” F.
@ 8 Pass Series/Parallel Arrangement.

105 110 110 110 115 115

6560 6900 7250
6380 6735 6950

150D 160D

35/40 35/40

2 2 2

1750/ 1450

160/242 160/242 242/242 242/242

1%11%

1%11%

I %1~%

2 2

120 120

450 450 450

250 250 250

=% %

X4 & Y2

219.2 219.2

4 4 4

4 4 4

219,2

Y4 & V2

219.2 219.2 219.2 219.2

4

219.2

219,2 219.2 219.2 219.2

21/2 21/2 .21/2

2 2

14

120 120

53.7
225 225
175 175

6

%

34 34
77 77

15ol/z

34 34

. .

1

34 34
77 77

115

115 120 120

16 16

45.1

6 6

Y8 %’s

I

1517/8

1507/2

. .

1

142?4

120 120 125 125

2 2 2

6/6 6/6 6/6

1%11ye 13/”11Vi 12/!!11ye

103~ 103/4

2 2 2

4 4 4

4 4 4

219.2 219.2

3 3 3

4 4 4

21/2 21/2 21/2

170D .

40/40 40/40

1750/1 450

120 120

7/4& V2

Integral

120

45.1
225
175

1517/~

34
77

150%’

34

.,

1

142%

34
77

7400

7100

125 125

7360
7060

2

103~

I

%

,.

219.2

2

.,

Page 18 I IM 377