Lennox SW 036 User manual

12/11
*2P1211*
506671-01
*P506671-01*
2011
Litho U.S.A. RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a qualified installer or
service agency.
INSTALLATION
INSTRUCTIONS
SW 036 ( 3 TON)
SW 060 ( 5 TON)
SW 120 (10 TON)
SW 240 (20 TON)
506671-01
12/2011
Supersedes 1/2011
WATER SOURCE HEAT PUMP UNITS
Table Of Contents
Parts Arrangement Page 2.....................
Dimensions Page 3............................
Shipping And Packing List Page 6...............
General Page 6...............................
Safety Page 6................................
Unit Support Page 7...........................
Duct Connection Page 7.......................
Rigging Unit For Lifting Page 7..................
Condensate Drains Page 8.....................
Water Supply Connections Page 8...............
Water Bypass Loop Page 11.....................
Bleed Air From Water Lines Page 11..............
Factory-Installed Options Page 12................
Electrical Connections Page 14..................
Blower Operation and Adjustment Page 16........
Cooling Start-Up Page 24.......................
Water Circuit Operation Page 28.................
Freeze Protection Page 28......................
Water Quality Guidelines Page 30................
Service Page 30...............................
SW 036 & 060 Parts Arrangement
INDOOR
COIL
WATER TO
REFRIGERANT
COIL
COMPRESSOR
BLOWER
FILTERS
(FOUR - 16 X 20 X 2”)
WATER INLET
CONNECTION
REVERSING
VALVE
IMC UNIT
CONTROLLER
BOTTOM
POWER ENTRY
WATER OUTLET
CONNECTION
BOTTOM
WATER ENTRY
WATER FLOW
CONTROL VALVE
(SEE FIGURE 6)
CHARGE
COMPENSATOR
BLOWER
MOTOR

Page 2
SW 120 Parts Arrangement
INDOOR
COIL
COMPRESSOR 1
BLOWER
FILTERS
(SIX - 16 X 25 X 2”)
ECONOMIZER
DAMPERS (OPTIONAL)
CHARGE
COMPENSATOR 1
REVERSING
VALVE 2
IMC UNIT
CONTROLLER
WATER INLET
CONNECTION
WATER OUTLET
CONNECTION
BOTTOM
WATER ENTRY
STG. 1 WATER FLOW
CONTROL VALVE
(SEE FIGURE 7)
STG. 1 WATER TO
REFRIGERANT COIL
(SEE FIGURE 7)
COMPRESSOR 2
BLOWER
MOTOR
REVERSING
VALVE 1
CHARGE
COMPENSATOR 2
STG. 2 WATER TO
REFRIGERANT COIL
(SEE FIGURE 7)
STG. 2 WATER FLOW
CONTROL VALVE
(SEE FIGURE 7)
SW 240 Parts Arrangement
STG. 1 WATER
FLOW CONTROL VALVE
(SEE FIGURE 8)
STG. 2 WATER
FLOW CONTROL VALVE
(SEE FIGURE 8)
INDOOR
COIL
BLOWER MOTOR
COMPRESSOR 1
BLOWER
FILTERS
(TWELVE - 20 X 20 X 2”)
ECONOMIZER
DAMPERS (OPTIONAL)
STG.1 WATER TO
REFRIGERANT COIL
(SEE FIGURE 8)
WATER INLET
CONNECTION
REVERSING
VALVES
IMC UNIT
CONTROLLER
WATER OUTLET
CONNECTION
BOTTOM
WATER ENTRY
CHARGE
COMPENSATOR 1
CHARGE
COMPENSATOR 2
COMPRESSOR 2
STG.2 WATER TO
REFRIGERANT COIL
(SEE FIGURE 8)

Page 3
SW 036 & 060 Dimensions
FRONT VIEWSIDE VIEW
FORKLIFT
SLOTS
BLOWER
INDOOR COIL
BOTTOM
POWER
ENTRY
FILTERS
BOTTOM POWER
ENTRY
5 x 8 inches
(127 x 203 mm)
RETURN AIR
OPENINGS
SUPPLY AIR
OPENING
COMPRESSOR
CONDENSATE DRAIN
ECONOMIZER
DAMPERS
(Factory Installed
Option)
INDOOR COIL
FILTERS
BLOWER
OUTDOOR AIR HOOD
(Factory Installed Option)
TOP VIEW
TOP VIEW BASE SECTION
LIFTING HOLES
(For Rigging
Front and Back)
28
(711)
15 (381)
18
(457)
14-1/4
(362)
4
(102)
4
(102)
81
(2057)
82-7/8
(2105)
28‐7/8
(733)
5-1/4
(133)
41‐3/8
(1050)
3‐1/2
(89)
37‐7/8
(962)
53-1/8
(1350)
12‐1/2
(318)
OUTDOOR
AIR
CIRCUIT
BREAKER
COVER
4‐1/4
(108)
ECONOMIZER DAMPERS
(Factory Installed Option)
1
(25)
12‐1/2
(318)
18
(457)
5‐1/4
(133)
1‐1/2
(38)
CONTROL
BOX
15-1/4
(387)
OUTDOOR AIR HOOD
FORKLIFT
SLOTS
115V OUTLET (FACTORY-
INSTALLED INSIDE UNIT;
FIELD WIRING REQUIRED)
WATER TO
REFRIGERANT
COIL
CHARGE
COMPENSATOR
COMPRESSOR
3 X 12 (76 X 305)
BOTTOM WATER
ENTRY
AA BB
DD CC
CENTER OF
GRAVITY
FF
EE
4-3/8
(111)
4-1/2
(114)
Unit Corner Weight - lbs. (kg) Center of Gravity - in. (mm)
AA BB CC DD EE FF
036 239 (108) 249 (113) 265 (120) 253 (115) 39-3/4 (1010) 28-3/4 (730)
060 244 (110) 255 (115) 272 (123) 259 (117) 39-3/4 (1010) 28-3/4 (730)
Weight with all options installed.

Page 4
SW 120 Dimensions
FORKLIFT
SLOTS
BLOWERS
INDOOR COIL
BOTTOM
POWER
ENTRY
FILTERS
SUPPLY AIR
OPENINGS
RETURN AIR
OPENING
COMPRESSORS (2)
CONDENSATE
DRAIN
ECONOMIZER
DAMPERS
(Factory Installed
Option)
INDOOR COIL
FILTERS
BLOWER
OUTDOOR AIR HOOD
(Factory Installed Option)
FRONT VIEW
TOP VIEW
SIDE VIEW
TOP VIEW BASE SECTION
LIFTING HOLES
(For Rigging
Front and Back)
40
(1016)
15 (381)
20 (508)
28
(711)
18 (457)
90‐1/4
(2292)
92-1/8
(2340)
31-3/16
(792)
5‐3/8
(137)
51‐3/8
(1305)
3‐1/2
(89)
47-7/8
(1216)
77‐5/16
(1964)
12‐3/8
(314)
12‐3/8
(314)
13-3/8
(340)
OUTDOOR
AIR
CIRCUIT
BREAKER
COVER
4‐1/4
(108)
ECONOMIZER DAMPERS
(Factory Installed Option)
OUTDOOR AIR HOOD
(For Outdoor Air Dampers)
4
(102)
4
(102)
BOTTOM POWER
ENTRY
5 x 8 inches
(127 x 203 mm)
115V OUTLET (FACTORY-
INSTALLED INSIDE UNIT;
FIELD WIRING REQUIRED)
FORKLIFT
SLOTS
5-1/4
(133)
1-1/2
(38)
FORKLIFT
SLOTS
BOTTOM
WATER ENTRY
CHARGE
COMPENSATORS
(2)
WATER TO
REFRIGERANT
COIL
CENTER OF
GRAVITY
FF
EE
DD CC
AA BB
OUTDOOR AIR HOOD
(With Economizer)
15-3/4
(400)
3 X 12 (76 X 305)
BOTTOM WATER
ENTRY
8-11/16
(221)
5-5/8
(143)
Corner Weight - lbs. (kg) Center of Gravity - in. (mm)
AA BB CC DD EE FF
416 (189) 417 (189) 474 (215) 473 (215) 41 (1041 38-3/4 (984)
Weight with all options installed.

Page 5
SW 240 Dimensions
Note: Optional equipment shown for information only. See
Engineering Handbook for standard and optional features.
BOTTOM
POWER
ENTRY
CONTROL
BOX
BLOWER
INDOOR COIL
FILTERS
BLOWER
FRONT VIEW
TOP VIEW
FORKLIFT SLOTS
(Front and Left
Side Only)
3‐1/4
(83)
120-1/2
(3061)
145-1/4
(3689)
65-3/16
(1656)
62
(1573)
LIFTING HOLES
(For Rigging
Front and Back)
BOTTOM POWER
ENTRY 5 X 8 inches
(127 X 203 mm)
BOTTOM SUPPLY
AIR OPENINGS
BOTTOM RETURN
AIR OPENING
4‐1/4
(108)
4‐1/2
(114)
28
(711)
28
(711)
4 (102)
9 (229)
20 (508) 20 (508)
15 (381)
18 (457)
60-1/2 (1537)
9-1/4
(235)
OPTIONAL
ECONOMIZER DAMPERS
(Factory or Field Installed)
OPTIONAL OUTDOOR AIR HOOD
(Factory or Field Installed)
COMPRESSOR
1-3/4
(45)
BOTTOM
WATER ENTRY
WATER TO
REFRIGERANT
COIL
17-3/8
(440)
CENTER OF
GRAVITY
FF
EE
BB
3 X 12 (76 X 305)
BOTTOM WATER
ENTRY
23-7/8
(606)
5-1/2
(140)
AA
CC
DD
17-3/8
(440)
CHARGE
COMPENSATOR
COMPRESSOR
CHARGE
COMPENSATOR
BLOWERS
(2)
61‐15/16
(1573)
EVAPORATOR
COIL
FILTERS
SIDE VIEW
OUTDOOR
AIR
90‐1/4
(2292)
30‐7/8
(784)
91-1/2
(2324)
ECONOMIZER DAMPERS
(Factory Installed Option)
25-1/2
(648)
OUTDOOR AIR HOOD
(With Economizer)
CONDENSATE
DRAIN
5‐3/8
(137) 3‐1/4
(83)
FORKLIFT
SLOTS
65‐3/16
(1656)
TOP VIEW BASE SECTION
115V OUTLET
(FACTORY-INSTALLED
INSIDE UNIT; FIELD
WIRING REQUIRED)
CIRCUIT
BREAKER
COVER
Corner Weight - lbs. (kg) Center of Gravity - in. (mm)
AA BB CC DD EE FF
684 (310) 684 (310) 750 (340) 750 (340) 40 (1016) 60 (1524)
Weight with all options installed.

Page 6
Shipping and Packing List
Package 1 of 1 contains:
1- Assembled unit
Check unit for shipping damage. Receiving party should
contact last carrier immediately if shipping damage is found.
General
These instructions are intended as a general guide and
do not supersede local codes in any way. Authorities
having jurisdiction should be consulted before
installation.
Requirements
The unit is ETL certified for outdoor installations only at
the clearances to combustible materials listed on unit
nameplate and in figures 1 and 2.
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
60
(1524)
A
60 (1524) 10 TON
48 (1219) 3 & 5 TON
A
RECOMMENDED SERVICE CLEARANCES IN (mm)
036, 060, AND 120 UNITS
TOP CLEARANCE UNOBSTRUCTED
FIGURE 1
BLOWER
36 (914) 3 & 5 TON
48 (1219) 10 TON
60
(1524)
SERVICE CLEARANCES IN (mm) - 240 UNITS
TOP CLEARANCE UNOBSTRUCTED
FIGURE 2
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
96
(2438) 48
(1219)
72
(1829)
60 (1524)
NOTE- ENTIRE PERIMETER OF UNIT BASE REQUIRES SUP
PORT WHEN ELEVATED ABOVE MOUNTING SURFACE.
*66 inches (1676mm)
recommended
service clearance for
blower deck removal.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
Installation of heat pumps must conform with standards in
National Fire Protection Association (NFPA) “Standard
for Installation of Air Conditioning and Ventilating
Systems NFPA No. 90A,” “Standard for Installation of
Residence Type Warm Air Heating and Air conditioning
Systems NFPA No. 90B,” local municipal building codes
and manufacturer's installation instructions.
The National Electric Code (ANSI/NFPA No. 70-1984) is
available from:
National Fire Protection Association
1 Batterymarch Park
PO Box 9101
Quincy, MA 02269-9101
The unit is ETL certified as a heat pump with cooling and
with or without auxiliary electric heat for non-residential
use only at the clearances to combustible materials as
listed on the unit nameplate and in figures 1 and 2.
Installation of ETL certified units must conform with current
standard C273.5 “Installation Requirements for Heat
Pumps” and applicable local codes. Authorities having
jurisdiction should be consulted before installation.
Use of this unit as a construction heater or air conditioner
is not recommended during any phase of construction.
Very low return air temperatures, harmful vapors and
operation of the unit with clogged or misplaced filters will
damage the unit.
If this unit has been used for heating or cooling of
buildings or structures under construction, the following
conditions must be met or the warranty will be void:
 A room thermostat must control the unit. The use of
fixed jumpers that will provide continuous heating or
cooling is not allowed.
 A pre-filter must be installed at the entry to the return
air duct.
 The return air duct must be provided and sealed to
the unit.
 Return air temperature range between 55°F (13°C)
and 80°F (27°C) must be maintained.
 Air filters must be replaced and pre-filter must be
removed upon construction completion.
 The unit components, duct system, air filters and
evaporator coil must be thoroughly cleaned following
final construction clean-up.
 The unit operating conditions (including airflow,
cooling operation, and heating operation) must be
verified according to these installation instructions.

Page 7
WARNING
Electric shock hazard and danger of
explosion. Can cause injury, death or
product or property damage. Turn off
electrical power to unit before
performing any maintenance or
servicing operations on the unit.
IMPORTANT
The Clean Air Act of 1990 bans the intentional vent
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar
ceration may be levied for non-compliance.
Unit Support
In downflow discharge installations, install the unit on a
non-combustible surface only.
NOTE - Securely fasten roof frame to roof per local codes.
Downflow Discharge Application
Roof Mounting with S1 / S6 / S7CURB
1- The S1 / S6 / S7CURB roof mounting frame must be
installed, flashed and sealed in accordance with the
instructions provided with the frame.
2- The S1 / S6 / S7CURB roof mounting frame should
be square and level to 1/16” per linear foot (5mm per
linear meter) in any direction.
3- Duct must be attached to the roof mounting frame
and not to the unit; supply and return plenums must
be installed before setting the unit.
Installer's Roof Mounting Frame
Many types of roof frames can be used to install the unit
depending upon different roof structures. Items to keep
in mind when using the building frame or supports are:
1- The base is fully enclosed and insulated, so an
enclosed frame is not required.
2- The frames or supports must be constructed with
non-combustible materials and should be square and
level to 1/16” per linear foot (5mm per linear meter)
in any direction.
3- Frame or supports must be high enough to prevent any
form of moisture from entering unit. Recommended
minimum frame height is 14” (356mm).
4- Duct must be attached to the roof mounting frame
and not to the unit. Supply and return plenums must
be installed before setting the unit.
5- Units require support along all four sides of unit base.
Supports must be constructed of steel or suitably
treated wood materials.
NOTE-When installing a unit on a combustible surface for
downflow discharge applications, an S1 / S6 / S7CURB
roof mounting frame is required.
Duct Connection
All exterior ducts, joints and openings in roof or building
walls must be insulated and weather-proofed with
flashing and sealing compounds in accordance with
applicable codes. Any duct passing through an
unconditioned space must be insulated.
CAUTION
In downflow applications, do not drill or punch
holes in base of unit. Leaking in roof may occur if
unit base is punctured.
Rigging Unit For Lifting
Rig unit for lifting by attaching four cables to holes in unit
base rail. See figure 3.
1- Detach wooden base protection before rigging.
2- Connect rigging to the unit base using both holes in
each corner.
3- All panels must be in place for rigging.
4- Place field‐provided H‐style pick in place just above
top edge of unit. Frame must be of adequate
strength and length. (H-style pick prevents damage
to unit.)
FIGURE 3
CAUTION - Do not
walk on unit.
IMPORTANT - ALL
PANELS MUST BE IN
PLACE FOR RIGGING.
RIGGING
LIFTING POINT SHOULD
BE DIRECTLY ABOVE
CENTER OF GRAVITY
*Maximum weight with all available
factory-installed accessories.
1030
1752
2720
036, 060
120
240
467
795
1256
Unit *Weight
Lbs. Kg.

Page 8
Condensate Drains
Remove cap and make drain connection to the 1” N.P.T.
drain coupling provided on unit. A trap must be installed
between drain connection and an open vent for proper
condensate removal. See figure 4. Always route
condensate line to a drain; condensate can damage
roofing material. The condensate line must be vented.
Check local codes concerning condensate disposal.
Refer to dimensions in the front of this manual for
condensate drain location.
FIGURE 4
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
UNIT
Minimum Pitch
1” (25 mm) per
10' (3 m) of line
MOUNTING
FRAME
OPEN VENT
CONDENSATE DRAIN CONNECTION
NOTE - Allow clearance to
open doors when installing
condensate piping. CAULK AROUND
CONDENSATE
COUPLING
Water Supply Connections
Supply and return water connections are to be made with
black iron pipe suitable for use in water systems. Lines
must enter the unit through the opening in the base.
Field-provided dielectric unions and flexible steel braided
hose should be installed between the black iron pipe and
the supply and return water connections. See dimensions
in the front of this manual.
1- Remove two-piece cover and install black iron pipes
through openings in base. Extend pipes 3-6in.
(76-152mm) above the opening. Use the following
diameter black iron pipe with NPT male threads:
036 - 1” diameter
060 - 1-1/4” diameter
120 - 1-1/2” diameter
240 - 2” diameter
2- Install the field-provided dielectric unions and flexible
steel braided hoses between the black iron pipe and
unit water in/out connections.
3- Apply a thread sealing compound to threaded
connections. Use only thread sealing compounds
compatible with water systems. Make sure hoses are
not kinked; this may indicate incorrect black iron pipe
height.
4- Cut half-round openings in the cover to fit around the
black iron pipe. See figure 5. Secure two-piece cover
to flanges and apply mastic sealant around openings.
IMPORTANT - Make sure flexible steel hoses are not
kinked. Kinked hoses may increase pressure drop and
reduce system performance.
Verify air vents are closed and that three-way water
inlet/outlet valves are in bypass position before pressure
testing the building system with air to avoid a
false-positive leak check. See figure 6, 7, or 8. Do not
pressurize the hose kits with more than 300 psi.

Page 9
INSTALL COVER
FIGURE 5
TWO-PIECE
COVER
CUT FOUR SEMI-
CIRCLES TO FIT
AROUND BLACK
IRON PIPES
BLACK
IRON PIPES
SECURE WITH
FOUR SCREWS
FIGURE 6
WATER-TO-REFRIGERANT CIRCUIT - SW 036, 060
WATER
IN
MANUAL
AIR VENT
WATER TO
REFRIGERANT
COIL
WATER
OUT
B39 WATER FLOW
CONTROL VALVE
(ON/OFF)
STRAINER
THREE-WAY
VALVE IN BYPASS
POSITION
THREE-WAY
VALVE IN MAIN
LOOP POSITION
FLEXIBLE
MESH BY
PASS HOSE
AUTOMATIC
FLOW
REGULATOR
DRAIN VALVE
WITH HOSE END
CONNECTION

Page 10
FIGURE 7
WATER-TO-REFRIGERANT CIRCUIT - SW 120
WATER TO
REFRIGERANT
COIL STG. 1
B39 STG. 1 WATER
FLOW CONTROL
VALVE (ON/OFF) MANUAL AIR
VENTS
WATER
IN WATER
OUT
STRAINER
THREE-WAY
VALVE IN MAIN
LOOP POSITION
WATER TO
REFRIGERANT
COIL STG. 2
B42 STG. 2 WATER
FLOW CONTROL
VALVE (ON/OFF)
THREE-WAY
VALVE IN BY
PASS POSITION
AUTOMATIC
FLOW
REGULATORS
FLEXIBLE
MESH BY
PASS HOSE
DRAIN VALVE
WITH HOSE END
CONNECTION
FIGURE 8
WATER-TO-REFRIGERANT CIRCUIT - SW 240
.
WATER-TO-
REFRIGER
ANT COIL
STG. 1
B39 STG. 1 WATER
FLOW CONTROL
VALVE (ON/OFF) MANUAL
AIR VENTS
WATER
IN
WATER
OUT
STRAINER
THREE-WAY
VALVE IN BYPASS
POSITION
THREE-WAY
VALVE IN
MAIN LOOP
POSITION
THREE-WAY
VALVE IN MAIN
LOOP POSITION
WATER TO
REFRIGERANT
COIL STG. 2
B42 STG. 2 WATER
FLOW CONTROL
VALVE (ON/OFF)
THREE-WAY
VALVE IN BY
PASS POSITION
AUTOMATIC
FLOW REGULATORS
FLEXIBLE
MESH BY
PASS HOSE
DRAIN VALVE
WITH HOSE END
CONNECTION

Page 11
Water Bypass Loop
The water bypass loop is used to flush the water system
without routing water through the rooftop unit
components. Units are shipped with three-way water
in/out valves in the bypass position. Refer to figure 9 for
water flow path. This prevents dirt and debris buildup in
the strainers and other components. Before placing unit
in service, bleed air from water lines (next section).
IMPORTANT - Make sure the three-way valves are
completely open (see figure 10). If the valves are not
fully open the amount of water entering the
water-to-refrigerant coil may be reduced. Reduced
water supply to the coil could severely limit unit
cooling performance. Reduced water flow could also
cause the water to freeze. Coils damaged due to
freezing water are not covered under warranty.
Bleed Air From Water Lines
1- Turn off all power to unit before bleeding lines.
2- Turn the three-way water inlet valve to main loop
position. If running water is not heard circulating,
make sure the main system pump is running.
3- Slowly open the manual air vent bleed port(s). When
the venting stops, close the air vent and turn the
three-way water outlet valve to main loop position.
The water will now be routed as shown in figure 10.
4- Measure the differential pressure across the
automatic flow regulator using a PT gauge set. See
figure 11. A minimum differential of 2.0 PSI is
required for proper flow.
FIGURE 9
036, 060, 120 UNITS
Water
Routed To
Bypass Loop
WATER
IN
WATER
OUT
WATER ROUTING DURING BYPASS MODE
Position Of Lever
On Inlet Valve
Position Of Lever
On Outlet Valve
240 UNITS
Water
Routed To
Bypass Loop
WATER
IN
WATER
OUT
Position Of Lever
On Inlet Valve
Position Of Lever
On Outlet Valve
FIGURE 10
Water Routed
To Coil
036, 060, 120 UNITS
WATER
IN
WATER
OUT
Position Of Lever
On Inlet Valve
Position Of Lever
On Outlet Valve
WATER ROUTING DURING NORMAL OPERATION
Water Routed
To Coil
240 UNITS
WATER
IN
WATER
OUT
Position Of Lever
On Inlet Valve
Position Of Lever
On Outlet Valve

Page 12
FIGURE 11
MEASURE REGULATOR WATER PRESSURE
.
AUTOMATIC
FLOW REGULATORS
PRESSURE/TEMPERATURE
PORTS (TWO ON EACH
AUTO FLOW REGULATOR)
Factory-Installed Economizer
A-Economizer
The A56 (EM1) economizer board controls economizer
operation and provides potentiometers to control
minimum damper position and enthalpy control
adjustments. The economizer board is positioned on the
A55 (M1) main control board in the unit control box. See
the Integrated Modular Control Guide for economizer
operation and adjustments.
Factory-Installed Intake Hood
036 & 060 Units
Intake hood is shipped folded down over the horizontal
supply air opening. Secure hood into place as follows:
1- Remove shipping screws securing sides of hood to unit.
2- Pivot hood as shown in figure 12 and secure sides
of hood to unit mullions with two sheet metal screws
on each side.
120 & 240 Units
Outdoor air hood is shipped folded down over the
horizontal supply air opening. Install hood as follows:
1- Remove left side from hood top panel.
2- Remove and retain screws securing hood to unit.
3- Lift (rotate) the bottom of the hood top panel and
attach left side to hood top panel. See figure 12.
4- Secure sides of hood to unit mullions with retained
screws.
5- Caulk hinge opening on each end of air hood.
6- 240 Units Only - Remove two support brackets from
hood top panel flange. See figure 13. Install as shown
in figure 14.
INTAKE HOOD
FIGURE 12
HOOD SECURED IN
PLACE FOR SHIPMENT
HOOD
INSTALLED
SUPPORT BRACKET LOCATION - 240 UNITS
FIGURE 13
SUPPORT
BRACKETS (2)
OUTDOOR AIR HOOD
FIGURE 14
HOOD TOP
PANEL
LIFT
240 Units
Only
CAULK
BOTH ENDS
See Detail A
Detail A
LEFT SIDE

Page 13
240 Units With Hood Filter Option
Outdoor air hood is shipped folded down over the
horizontal supply air opening. The intake hood filters and
support brackets are shipped unassembled in the blower
compartment. Install as follows:
1- Remove left side from hood top panel.
2- Remove and retain screws securing hood to unit.
3- Lift (rotate) the bottom of the hood top panel and
attach left side to hood top panel. See figure 12.
4- Secure sides of hood to unit mullions with retained
screws.
5- Caulk hinge opening on each end of air hood.
6- Install back filter bracket on unit division panel as
shown in figure 16.
7- Secure side seals to the hood sides as shown in figure
17.
8- Install longer front filter bracket on hood top as shown
in figures 15 and 16. Insert four filters.
9- Slide fifth filter into back filter bracket and hold in
place at the top of the opening with the shorter front
bracket. Align holes on hood with bracket holes and
secure filter bracket with sheet metal screws.
REMOVE LEFT SIDE OF HOOD FROM UNIT
FIGURE 15
HOOD TOP
PANEL
LEFT
SIDE
LONGER
FRONT
BRACKET
SHORTER
FRONT
BRACKET
FIGURE 16
HOOD SIDE VIEW
HOOD TOP
UNIT
DIVISION
PANEL
BACK FILTER
BRACKET
FRONT FILTER
BRACKETS (2)
FILTERS
HOOD SIDE
FIGURE 17
LEFT
FILTER
SEAL
RIGHT
FILTER
SEAL
FILTERS

Page 14
Electrical Connections
POWER SUPPLY
Do not apply power or close disconnect switch until
installation is complete. Refer to start-up directions.
Refer closely to unit wiring diagram.
Refer to unit nameplate for minimum circuit ampacity
and maximum fuse size.
1- 230/460/575 volt units are factory wired. For 208V
supply, disconnect the orange wire (230V) at
control power transformer(s). Reconnect the red
wire (208V). Tape the exposed end of the 230V
orange wire.
2- Route power through the bottom power entry area
and connect to line side of unit disconnect or circuit
breaker. If unit does not contain optional controls
package, connect power wiring to TB13 terminal
block. See unit wiring diagram.
3- Units With Optional 120v GFCI Outlet -
Route and connect separate 120v wiring to GFCI
outlets which do not have factory-installed wiring.
CONTROL WIRING
A-Thermostat Location
Room thermostat mounts vertically on a standard 2” X 4”
handy box or on any non-conductive flat surface.
Locate thermostat approximately 5 feet (1524mm)
above the floor in an area with good air circulation at
average temperature. Avoid locating the room
thermostat where it might be affected by:
-drafts or dead spots behind doors and in corners
-hot or cold air from ducts
-radiant heat from sun or appliances
-concealed pipes and chimneys
B-Wire Routing
Route thermostat cable or wires from subbase through
knockout or bottom power entry area provided in unit. Use
18 AWG wire for all applications using remotely installed
electro-mechanical and electronic thermostats.
IMPORTANT - Unless field thermostat wires are rated
for maximum unit voltage, they must be routed away
from line voltage wiring.
C-Wiring Connections
This unit is equipped with a series of integrated modular
control (IMC) boards which control unit function. Refer to
the IMC manual provided with each unit.
The IMC will operate the unit from a thermostat, zone
sensor, zoning system or the FS1-1 (A138) controller
based on the System Mode selected in ECTO 6.01. The
default System Mode (option 0) is the thermostat mode.
1- Default Thermostat Mode ECTO 6.01 Option 0 -
The IMC will operate two stages of heating and
cooling based on thermostat demands. Install
thermostat assembly in accordance with instructions
provided with thermostat. See figure 18 for field
wiring and wiring diagrams on unit.
IMPORTANT-Terminal connections at the wall plate or
subbase must be made securely. Loose control wire
connections may result in intermittent operation.
Note - Install sensor and make communication wiring
connections as shown in literature provided with sensor.
1
2
18
FIGURE 18
24 VOLT FIELD WIRING IN THERMOSTAT MODE
(IMC in default T'Stat System Mode 6.01 Option 0)
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
TB1
Not all terminals
are provided on all
thermostats.
Note - On electro-me
chanical thermostats set
anticipator at 0.1 amps.
Jumper 8 & 9 when
thermostat has no night
setback terminals; unit will
operate in occupied mode.
19
20
21
22
23
24
25
A2 (2 HT / 2CL)
THERMOSTAT
Remove the jumper when
a Network Control Panel
(NCP) is installed.
95
96
Install optional A42 phase
monitor and/or S42 over
load relay switch.
2- Zone Sensor Mode ECTO 6.01 Option 1, 2, or 3-
The IMC will operate up to four stages of heating and
cooling based on the IMC internal setpoints and the
temperature from the A2 zone sensor. An optional
Network Control Panel (NCP) can also be used to
provide setpoints. A thermostat or return air sensor

Page 15
can be used as a back-up mode. Refer to the IMC
manual provided with each unit to change ECTO
options. See figure 19 for field wiring.
FIGURE 19
16
17
TB1
24 VOLT FIELD WIRING IN ZONE SENSOR MODE
(IMC in Zone Sensor Mode ECTO 6.01 option 1, 2, 3)
A2 SENSOR

Page 16
Blower Operation and Adjustments
IMPORTANT
Three phase scroll compressors must be phased
sequentially for correct compressor and blower
rotation. Follow “COOLING START-UP” section of
installation instructions to ensure proper compres
sor and blower operation.
A-Blower Operation
Initiate blower demand at thermostat according to
instructions provided with thermostat. Unit will cycle on
thermostat demand. The following steps apply to
applications using a typical electro-mechanical
thermostat.
1- Blower operation is manually set at the thermostat
subbase fan switch. With fan switch in ON position,
blowers will operate continuously.
2- With fan switch in AUTO position, the blowers will
cycle with demand. Blowers and entire unit will be off
when system switch is in OFF position.
In zone sensor applications the blower will cycle with
demand (default). For continuous blower operation
change ECTO 6.17 to option 1. Refer to the IMC manual.
B-Blower Access
1- Remove screws on either side of blower assembly
sliding base. See figure 20, 21, or 22.
2- Pull base toward outside of unit.
C-Determining Unit CFM (with wet coil)
1- Run blower with a cooling demand. Measure the
indoor blower shaft RPM. Air filters must be in place
when measurements are taken.
2- With all access panels in place, measure static
pressure external to unit (from supply to return).
3- Referring to tables 2 through 5, use static pressure
and RPM readings to determine unit CFM.
4- Constant Air Volume (CAV) Supply Air Blowers -
The blower RPM can be adjusted at the motor pulley.
Loosen Allen screw and turn adjustable pulley
clockwise to increase CFM. Turn counterclockwise to
decrease CFM. See figure 20, 21, or 22. Do not
exceed minimum and maximum number of pulley
turns as shown in table 1.
TABLE 1
MINIMUM AND MAXIMUM PULLEY ADJUSTMENT
Belt Minimum Turns Open Maximum Turns Open
A Section No minimum 5
B Section 1* 6
*No minimum number of turns open when B belt is used on
pulleys 6” O.D. or larger.
FIGURE 20
TO INCREASE BELT TENSION
1-Loosen four screws securing blower
motor to sliding base.
2-Turn adjusting screw to the left, or
counterclockwise, to move the motor
downward and tighten the belt.
3-Tighten four screws.
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
BLOWER
WHEEL
BLOWER
MOTOR
MOTOR
PULLEY
ALLEN
SCREW
BLOWER ASSEMBLY
SLIDING BASE
BELT TENSION
ADJUSTING
SCREW
LOOSEN (4)
SCREWS TO
ADJUST BELT
TENSION
REMOVE SCREWS TO SLIDE
BLOWER ASSEMBLY OUT OF UNIT
BLOWER ASSEMBLY (SW 036 & 060)
BLOWER
PULLEY
PULLEY
ADJUSTMENT
BOLTS

Page 17
FIGURE 21
BLOWER ASSEMBLY (SW 120)
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
BLOWER
MOTOR
PULLEY
BLOWER ASSEMBLY
SLIDING BASE
REMOVE SCREWS TO
SLIDE BLOWER
ASSEMBLY OUT OF UNIT
TO INCREASE BELT TENSION
1-Loosen four bolts securing motor base to mounting
frame.
2-Turn adjusting bolt to the right, or clockwise, to
move the motor outward and tighten the belt.
3-Tighten two bolts on motor pulley side.
IMPORTANT - Align top edges of blower motor base
and mounting frame base parallel before tightening
two bolts on the other side of base. Motor shaft and
blower shaft must be parallel.
4-Tighten two bolts on other side of base.
BELT TENSION
ADJUSTING BOLT - TURN
CLOCKWISE TO TIGHTEN
FIGURE 22
BLOWER ASSEMBLY (SW 240)
TO INCREASE BELT TENSION
1-Loosen four screws securing blower motor to
sliding base.
2-Turn adjusting screw to the right, or clockwise,
to move the motor upward and tighten the
belt.
3-Tighten four screws.
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
LOOSEN SCREWS
TO ADJUST BELT
TENSION
BLOWER
MOTOR
REMOVE SCREWS TO SLIDE
BLOWER ASSEMBLY OUT OF UNIT
LOOSEN SCREWS TO
ADJUST BELT TENSION
PULLEY
ALLEN SCREW
BELT TENSION
ADJUSTING SCREWS
BLOWER
ASSEMBLY
SLIDING BASE
PULLEY
MOTOR ALLEN
SCREW
SIDE VIEW
CAV UNITS:
ALIGN TOP EDGES
PARALLEL BEFORE
TIGHTENING MOTOR IN PLACE

Page 18
D-Blower Belt Adjustment
Maximum life and wear can be obtained from belts only if
proper pulley alignment and belt tension are maintained.
Tension new belts after a 24-48 hour period of operation.
This will allow belt to stretch and seat grooves. Make sure
blower and motor pulley are aligned as shown in figure 23.
Adjust belt tension as shown in figure 20, 21, or 22.
FIGURE 23
PULLEY ALIGNMENT
BELT BLOWER
PULLEY
MOTOR
PULLEY NOT ALIGNED
ALIGNED
E-Check Belt Tension
Overtensioning belts shortens belt and bearing life.
Check belt tension as follows:
1- Measure span length X. See figure 24.
2- Apply perpendicular force to center of span (X) with
enough pressure to deflect belt 1/64” for every inch
of span length or 0.4mm per 25.4mm of span length.
Example: Deflection distance of a 40” span would be
40/64” or 5/8”.
Example: Deflection distance of a 1016mm span
would be 16mm.
3- Measure belt deflection force. For a used belt, the
deflection force should be 5 lbs. (35kPa). A new belt
deflection force should be 7 lbs. (48kPa).
A force below these values indicates an
undertensioned belt. A force above these values
indicates an overtensioned belt.
MEASURE BELT TENSION
FIGURE 24
DEFLECTION 1/64” PER INCH OF SPAN
OR 0.4mm PER 25.4mm OF SPAN
FORCE
F-Field-Furnished Blower Drives
Use tables 2 through 5 to determine BHP and RPM
required. Reference table 6 to determine the CAV drive
numbers and table 7 through 9 to determine the CAV
manufacturer's model number.

Page 19
TABLE 2
SW 036 BLOWER PERFORMANCE
NOTE - Blower Table Includes Resistance For Base Unit With Wet Indoor Coil And Air Filters In Place.
Air
Volume
cfm
EXTERNAL STATIC PRESSURE - Inches Water Gauge
Drive
No. 0.10 0.20 0.30 0.40 0.50 0.60
900
5
507 0.32 577 0.35 650 0.37 728 0.39 802 0.41 867 0.44
1000 525 0.34 593 0.37 665 0.39 740 0.41 813 0.43 876 0.46
1100 543 0.36 611 0.39 682 0.41 754 0.43 825 0.45 887 0.49
1200 562 0.38 630 0.41 700 0.43 770 0.45 839 0.48 899 0.52
1300 583 0.40 651 0.43 720 0.45 788 0.47 854 0.51 912 0.55
1400 606 0.43 674 0.45 740 0.47 806 0.51 871 0.55 926 0.59
1500 630 0.45 697 0.48 762 0.50 826 0.54 888 0.59 941 0.63
1600 657 0.48 722 0.51 784 0.54 847 0.58 906 0.63 957 0.67
1700 685 0.52 748 0.55 808 0.58 869 0.62 925 0.68 974 0.72
1800 714 0.56 773 0.58 831 0.62 891 0.67 944 0.73 992 0.78
1900 743 0.60 799 0.63 855 0.67 913 0.73 965 0.79 1012 0.83
2000
1
771 0.64 824 0.67 880 0.72 936 0.79 986 0.85 1034 0.90
2100 798 0.68 849 0.72 905 0.79 960 0.86 1009 0.92 1057 0.96
2200 823 0.73 875 0.79 932 0.86 986 0.93 1034 0.98 1081 1.02
2300 849 0.79 903 0.86 961 0.94 1012 1.01 1060 1.06 1107 1.09
2400 876 0.86 934 0.94 991 1.03 1049 1.09 1086 1.13 1132 1.16
2500 907 0.94 968 1.04 1022 1.12 1069 1.16 1113 1.20 1159 1.23
Air
Volume
cfm
EXTERNAL STATIC PRESSURE - Inches Water Gauge
Drive 0.70 0.80 0.90 1.0 1.10 1.20
No. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
900
1
919 0.46 968 0.48 1018 0.51 - - - - - - - - - - - - - - - - - -
1000 928 0.49 976 0.51 1027 0.54 1082 0.57 1138 0.60 - - - - - -
1100 938 0.52 985 0.54 1037 0.57 1093 0.60 1149 0.64 1207 0.67
1200 949 0.55 996 0.57 1049 0.60 1105 0.64 1162 0.67 1220 0.71
1300 960 0.58 1008 0.61 1061 0.64 1117 0.68 1175 0.71 1233 0.75
1400 974 0.62 1022 0.65 1075 0.68 1132 0.72 1189 0.75 1248 0.79
1500 988 0.67 1037 0.70 1092 0.73 1149 0.77 1206 0.80 1265 0.84
1600 1004 0.71 1054 0.75 1110 0.78 1168 0.82 1226 0.86 1285 0.89
1700 1021 0.76 1073 0.80 1130 0.84 1189 0.88 1248 0.92 1307 0.96
1800 1041 0.82 1094 0.86 1151 0.90 1211 0.94 1270 0.98 1329 1.02
1900 1062 0.87 1115 0.91 1172 0.95 1232 1.00 1291 1.04 1351 1.08
2000
Field
Fur
nished
1084 0.93 1137 0.97 1194 1.01 1252 1.05 1312 1.09 1371 1.13
2100 1107 1.00 1160 1.03 1216 1.07 1274 1.11 1333 1.15 1393 1.19
2200 1131 1.06 1183 1.09 1239 1.13 1296 1.17 1355 1.21 1414 1.25
2300 1155 1.12 1207 1.16 1262 1.19 1319 1.23 1377 1.27 1436 1.30
2400 1181 1.19 1232 1.22 1286 1.25 1343 1.29 1400 1.32 1459 1.36
2500 1207 1.26 1257 1.29 1311 1.32 1366 1.35 1423 1.38 1481 1.42
NOTE - italics - field furnished.

Page 20
TABLE 3
SW 060 BLOWER PERFORMANCE
NOTE - Blower Table Includes Resistance For Base Unit With Wet Indoor Coil And Air Filters In Place.
Air
Volume
cfm
EXTERNAL STATIC PRESSURE - Inches Water Gauge
Drive
No. 0.10 0.20 0.30 0.40 0.50 0.60
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
900
Field
Fur
nished
507 0.32 577 0.35 650 0.37 728 0.39 802 0.41 867 0.44
1000 525 0.34 593 0.37 665 0.39 740 0.41 813 0.43 876 0.46
1100 543 0.36 611 0.39 682 0.41 754 0.43 825 0.45 887 0.49
1200 562 0.38 630 0.41 700 0.43 770 0.45 839 0.48 899 0.52
1300 583 0.40 651 0.43 720 0.45 788 0.47 854 0.51 912 0.55
1400 606 0.43 674 0.45 740 0.47 806 0.51 871 0.55 926 0.59
1500 630 0.45 697 0.48 762 0.50 826 0.54 888 0.59 941 0.63
1600 657 0.48 722 0.51 784 0.54 847 0.58 906 0.63 957 0.67
1700 685 0.52 748 0.55 808 0.58 869 0.62 925 0.68 974 0.72
1800 714 0.56 773 0.58 831 0.62 891 0.67 944 0.73 992 0.78
1900 743 0.60 799 0.63 855 0.67 913 0.73 965 0.79 1012 0.83
2000
1
771 0.64 824 0.67 880 0.72 936 0.79 986 0.85 1034 0.90
2100 798 0.68 849 0.72 905 0.79 960 0.86 1009 0.92 1057 0.96
2200 823 0.73 875 0.79 932 0.86 986 0.93 1034 0.98 1081 1.02
2300 849 0.79 903 0.86 961 0.94 1012 1.01 1060 1.06 1107 1.09
2400 876 0.86 934 0.94 991 1.03 1040 1.09 1086 1.13 1132 1.16
2500 907 0.94 968 1.04 1022 1.12 1069 1.16 1113 1.20 1159 1.23
Air
Volume
cfm
EXTERNAL STATIC PRESSURE - Inches Water Gauge
Drive 0.70 0.80 0.90 1.0 1.10 1.20
No. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
900
1
919 0.46 968 0.48 1018 0.51 - - - - - - - - - - - - - - - - - -
1000 928 0.49 976 0.51 1027 0.54 1082 0.57 1138 0.60 - - - - - -
1100 938 0.52 985 0.54 1037 0.57 1093 0.60 1149 0.64 1207 0.67
1200 949 0.55 996 0.57 1049 0.60 1105 0.64 1162 0.67 1220 0.71
1300 960 0.58 1008 0.61 1061 0.64 1117 0.68 1175 0.71 1233 0.75
1400 974 0.62 1022 0.65 1075 0.68 1132 0.72 1189 0.75 1248 0.79
1500 988 0.67 1037 0.70 1092 0.73 1149 0.77 1206 0.80 1265 0.84
1600 1004 0.71 1054 0.75 1110 0.78 1168 0.82 1226 0.86 1285 0.89
1700 1021 0.76 1073 0.80 1130 0.84 1189 0.88 1248 0.92 1307 0.96
1800 1041 0.82 1094 0.86 1151 0.90 1211 0.94 1270 0.98 1329 1.02
1900 1062 0.87 1115 0.91 1172 0.95 1232 1.00 1291 1.04 1351 1.08
2000
Field
Fur
nished
1084 0.93 1137 0.97 1194 1.01 1252 1.05 1312 1.09 1371 1.13
2100 1107 1.00 1160 1.03 1216 1.07 1274 1.11 1333 1.15 1393 1.19
2200 1131 1.06 1183 1.09 1239 1.13 1296 1.17 1355 1.21 1414 1.25
2300 1155 1.12 1207 1.16 1262 1.19 1319 1.23 1377 1.27 1436 1.30
2400 1181 1.19 1232 1.22 1286 1.25 1343 1.29 1400 1.32 1459 1.36
2500 1207 1.26 1257 1.29 1311 1.32 1366 1.35 1423 1.38 1481 1.42
NOTE - italics - field furnished.