NHT 25, NJT 30, NJT 40, NJT 50 air conditioner, MACZ 50A evaporator coil Installation manual

R-410A
MODELS:
NHT25, 2-Pipe
NJT30 Thru T50, 4-Pipe
25 - 50 Ton, 60 Hertz
TABLE OF CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Agency Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Application Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Data Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Discharge Conversion . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2
2
2
2
3
3
4
5
5
5
5
5
8
Refrigerant Mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expansion Valve Bulb Installation . . . . . . . . . . . . . . . . . . .
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections Air Handlers with Contactor . . . . .
NJT50 Bearing Alignment: . . . . . . . . . . . . . . . . . . . . . . . .
.............................................
Air System Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .
Twin Belt Drive Adjustment . . . . . . . . . . . . . . . . . . . . . . . .
Airflow Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
14
14
16
17
19
21
21
21
22
35
36
41
LIST OF TABLES
1
2
3
4
5
6
7
8
Unit Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical Data Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . 4
Unit Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . 11
Corner Weights & Center of Gravity NH/NJ Units . . . . . 11
Accessory Operating Weight Distribution (Lbs) . . . . . . . 12
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Overload Relay Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Overload Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1
2
3
4
NHT25 and NJT30/T40 Vertical Airflow Arrangements . . 6
NHT25 and NJT30/T40 Horizontal Airflow Arrangements 6
NJT50 & MACZ-50 Airflow Arrangements . . . . . . . . . . . . 7
NHT25/NJT30/NJT40 Weight Distribution With Suspension
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
NHT25/NJT30/NJT40 Details For Securing Suspension
Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
NJT50 & MACZ-50 Weight Distribution With Suspension
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7: NJT50 & MACZ-50 Details For Securing
Suspension Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8: Recommended Drain Piping . . . . . . . . . . . . . . 12
Figure 9: Suggested Method For Connecting Ductwork 15
Figure 10: NHT25/NJT30/NJT40 Motor Arrangements As
Seen In Figures 1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . 19
NJT50 Factory Motor Mounting Position . . . . . . . . . . . . 20
Figure 11: NJT50 Center Bearing . . . . . . . . . . . . . . . . . 20
Figure 13: NJT50 Motor Mount Plate . . . . . . . . . . . . . . 20
Figure 14: Double Groove Pulley . . . . . . . . . . . . . . . . . 21
Figure 15: Hole Locations For Reading Coil Pressure
Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16: NHT25 - Pressure Drop Vs. Cfm Across Dry
Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 17: NJT30 - Pressure Drop Vs. Cfm Across Dry
Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 19: NJT50 & MACZ-50 - Pressure Drop Vs. Cfm
Across Dry Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9
10
11
12
13
14
15
Unit Blower Motor Data . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Drive Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Performance Data - 25 Ton . . . . . . . . . . . . . . . . . .
Fan Performance Data - 30 Ton . . . . . . . . . . . . . . . . . .
Fan Performance Data - 40 Ton . . . . . . . . . . . . . . . . . .
Fan Performance Data - 50 Ton . . . . . . . . . . . . . . . . . .
Unit Connection Sizes . . . . . . . . . . . . . . . . . . . . . . . . . .
18
21
22
22
22
23
35
LIST OF FIGURES
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 Figure 18: NJT40 - Pressure Drop Vs. Cfm Across Dry
Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
20 Figure 20: NHT25 Unit Dimensions . . . . . . . . . . . . . . . 26
21 Figure 21: NHT25 Unit Dimensions (Continued) . . . . . . 27
22 Figure 22: NJT30 Unit Dimensions . . . . . . . . . . . . . . . . 28
23 Figure 23: NJT30 Unit Dimensions (Continued) . . . . . . 29
24 Figure 24: NJT40 Unit Dimensions . . . . . . . . . . . . . . . . 30
25 Figure 25: NJT40 Unit Dimensions (Continued) . . . . . . 31
26 Figure 26: NJT50 Unit Dimensions . . . . . . . . . . . . . . . . 32
27 Figure 27: MACZ-50 Evaporator Section Dimensions . . 33
28 Figure 28: NJT50 Air handler & MACZ-50 Evaporator Coil
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
29 Figure 29: Typical NC300 Indoor Unit Wiring Diagram
(Contactor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
30 Figure 30: Typical ND360, 480 & 600 Indoor Unit Wiring
Diagram (Contactor) . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
31 Figure 31: Typical Field Wiring Diagram - NHT25
Evaporator Unit with YHT25 Condenser Unit . . . . . . . . 38
32 Figure 32: Typical NHT25 Liquid Line Solenoid Wiring . 38
33 Figure 33: Typical Field Wiring Diagram NJT30/T40
Evaporator Units, NJT50 Air Handler and MACZ-50A
Evaporator Coil when Matched with YJ-30/T40/T50
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
34 Figure 34: Typical NJT30/T40 & MACZ-50A Liquid Line
Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
35 Figure 35: Typical Liquid Line Solenoid Wiring . . . . . . . 40
5121846-TIM-A-0515
5121846-TIM-A-0515
General
Reference
The NH/NJ Series evaporator units are designed to match with
YH/YJ Series condensing units. When matched, these units
meet ASHRE 90.1 standards.
This instruction covers the installation and operation of
evaporator blower units. For information on the operation of
matching condensing units, refer to Installation Manual for
cooling units.
NHT25, NJT30 and NJT40 units consist of an evaporator coil
section and a blower section that are factory assembled and
shipped as shown in Figures 20 thru 25. These sections may be
rearranged in the field for other air discharge patterns as shown
in Figures 1 and 2.
Additional information on the design, installation, operation and
service of this equipment is available in the following Technical
Guides Model No. YHT25/NHT25 Technical Guide-5123379,
Model No.YJ-30 thru T50 Technical Guide-5123384 and Model
No. NJT30 thru T50 Technical Guide-5123383.
NJT50 units consist of a blower section only and must be
matched with an MACZ-50 evaporator coil as shown in Figures
27 thru 28. These units are shipped separately and must be
field assembled as shown in Figure 28. These sections may be
rearranged for other air discharge patterns as shown in Figure
3.
Renewal Parts
The NH/NJ evaporator coils have 24 volt normally closed
solenoid valves, that when matched with the YH/YJ condensing
units Simplicity® controls provide capacity staging and pump
out for higher efficiencies and product reliability.
Design certified by CSA as follows:
Safety Considerations
Inspection
Installer should pay particular attention to the words: NOTE,
CAUTION, and WARNING. Notes are intended to clarify or
make the installation easier. Cautions are given to prevent
equipment damage. Warnings are given to alert installer that
personal injury and/or equipment damage may result if
installation procedure is not handled properly.
As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill. A separate
request for inspection by the carrier’s agent should be made in
writing.
Improper installation may create a condition where the
operation of the product could cause personal injury or
property damage.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage.
Refer to this manual for assistance or for additional
information, consult a qualified contractor, installer or
service agency.
Contact your local Source 1 parts distribution center for
authorized replacement parts.
Agency Approvals
1.
For use as a cooling coil.
2.
For indoor installation only.
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable
local, state and national codes including, but not limited
to, building, electrical, and mechanical codes.
Wear safety glasses and gloves when handling
refrigerants. Failure to follow this warning can cause
serious personal injury.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system. Gage sets, hoses, refrigerant
containers and recovery systems must be designed to
handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in property
damage or injury.
2
Johnson Controls Unitary Products
5121846-TIM-A-0515
Nomenclature
Configured Split Air Handler Model Number Nomenclature
N J T30 C00 N 6 A AA 1
Product Category
N = Split System, Air Handler, AC, R-410A
Product Generation
1 = First Generation
Product Identifier
J = Standard Efficiency, 4-Pipe, R-410A (30-50T)
Product Options1
AA = No Options Installed
EJ = E-Coat Evap Coil (See Note 1.)
Nominal Cooling Capacity - MBH
1. NJT50C00N*AAA1 airhandler does not include
evaporator coil. Customer must order MACZ-50A
Standard Coil.
T30 = 30 Ton
T40 = 40 Ton
T50 = 50 Ton
Installation Options
Heat Type & Nominal Heat Capacity
A = None
C00 = Cooling Only
Voltage
6 = 208/230/460-3-60
5 = 575-3-60
Airflow2
N = None (Motor Drive Kit Req)*
2. Motors, drives and overloads
are not shipped with 30 - 50 ton
Air Handler Units.
Unit Application Data
Table 1:
Model
NHT25
NJT30
NJT40
NJT50
Unit Application Data
Power Supply Voltage
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
Voltage Variation
Min.
187
414
540
187
414
540
187
414
540
187
414
540
Max.
253
506
630
253
506
630
253
506
630
253
506
630
Supply Air Range CFM
Min.
8,000
8,000
8,000
10,000
10,000
10,000
12,800
12,800
12,800
16,000
16,000
16,000
Max.
12,000
12,000
12,000
14,000
14,000
14,000
19,200
19,200
19,200
24,000
24,000
24,000
Entering Air Temperature Degrees °F
Cooling
Heating DB1
DB/WB
Min.
Max.
Min.
Max.
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
65/57
95/72
40
77
1. Heating Min/Max temperatures apply to steam and hot water coils. NOTE: Do not apply steam to hot water coils.
Johnson Controls Unitary Products
3
5121846-TIM-A-0515
Physical Data Indoor Unit
Table 2:
Physical Data Indoor Unit
Component
NHT25
25
Nominal Tonnage
DIMENSIONS (inches)
Length
Width
Height
Models
NJT30
NJT40
30
40
NJT501
50
100.1
38.1
74.6
100.1
38.1
74.6
103.1
45.4
89.4
105.1
53.7
99.0
1067
1122
1246
1684
1130
1157
-----
1184
1208
1224
---
--1348
1364
---
----1742
1859
18 X 18
2
18 X 18
2
18 X 18
2
20 x 18
2
WEIGHTS2 (lb)
Unit Shipping
Unit Operating With
5 hp Motor and Drive
7.5 hp Motor and Drive
10 hp Motor and Drive
15 hp Motor and Drive
INDOOR BLOWER
Diameter x Width
Qty.
INDOOR COIL
Face area (Sq. Ft.)
Rows
Fins per inch
Tube diameter
Circuitry Type
Refrigerant Control
25.8
25.8
33.3
41.3
4
4
4
4
16
16
16
16
3/8
3/8
3/8
3/8
Interlaced Interlaced Interlaced Interlaced
TEV
TEV
TEV
TEV
SYSTEM DATA
No. Refrigeration Circuits
Suction Line OD (in.)
Liquid Line OD (in.)
1
2 1/8
7/8
2
1 1/8
7/8
2
1 3/8
7/8
2
2 1/8
7/8
--------10
--34.7
--------10
--34.7
6
3
----6
--42.6
------6
3
6
53.1
21.2
2
12
1/2
1 3/8
150
21.2
2
12
1/2
1 3/8
150
27.2
2
12
1/2
1 5/8
190
27.2
2
8
1/2
1 5/8
190
18.2
1
8
1
18.2
1
8
1
---------
---------
2
1-1/2
160
2
1-1/2
160
-------
-------
FILTERS
Size and Quantity Per Model (In.)
Face area (Sq. Ft.)
16 x 20 x 2
20 x 20 x 2
20 x 22 x 2
16 x 25 x 2
20 x 25 x 2
25 x 25 x 2
ACCESSORY
HOT WATER COIL DATA
Face area (Sq. Ft.)
Rows
Fins per inch
Tube diameter (Copper) OD (In.)
Connections (Supply and Return) OD (In.)
Weight (lb)
STEAM COIL DATA
Face area (Sq. Ft.)
Rows
Fins per inch
Tube diameter (Copper) (In.)
Connection, (NPTE) (In.)
Inlet
Outlet
Weight (lb)
1. NJT50 and MACZ-50A Combined
2. Motor, Motor Drive and Motor Overload Kits must be ordered separately, The Motor,
Motor Drive and Overload Kits are to be field installed.
4
Johnson Controls Unitary Products
5121846-TIM-A-0515
Unit Installation
on one end of the unit if the blower shaft or evaporator coil is to
be replaced without moving the unit.
Location
Air Discharge Conversion
The evaporator blowers are not designed for outdoor
installation. They must be located inside the building structure,
either inside or outside the conditioned space where they are
protected from rain and other such moisture.
The unit should be located as close to the condensing unit as
practical and positioned to minimize bends in the refrigerant
piping.
Units being installed vertically or horizontally can be set directly
on a floor or platform, or supported by metal or wooden beams.
NHT25/NJT30/NJT40 Air Discharge
These units are shipped for upflow operation, but may be
converted for any of the illustrated air discharge patterns shown
in Figures 1 and 2.
Convert as follows:
1.
Remove the (blower section) panels.
2.
Remove the Phillips machine screws located inside casing
corner angles that hold the evaporator and blower sections
together.
3.
Rotate the blower section for the desired air discharge
orientation.
Units being installed horizontally can be suspended from above
as shown in Figures 4 and 6.
Rigging
Care must be taken when moving the unit. Do not remove any
packaging until the unit is near the place of installation.
SPREADER BARS SHOULD BE USED BETWEEN THE
SLINGS TO PREVENT CRUSHING THE UNIT FRAME OR
PANELS. When preparing to move the unit, always determine
the center of gravity of the unit in order to equally distribute the
weight. Rig the unit by attaching chain or cable slings around
the bottom skid. A lift truck may be used to raise a unit to a
suspended location. Refer to Table 2 for the total unit operating
weight.
NOTE: Before proceeding to step 4, see the section on the
blower motor mounting locations and mount the blower
motor in the desired position.
4.
If accessory heating coils are used, mount heating coil
between evaporator and blower sections. Screw fastening
locations are the same for all sections and heating
accessories. If heating coils are not used, fasten
evaporator section to blower section with machine screws
removed in step 2.
Clearances
5.
See duct and drain connections.
6.
Replace panels.
A 25-inch clearance is required on the end with the piping
connections and the supply air blower motor to properly service
and maintain the unit and to replace the filters.
Some clearance will also be required for the duct and power
wire connections. A clearance equal to the unit width is required
Johnson Controls Unitary Products
5
5121846-TIM-A-0515
1
AIR
BLOWER
3
2
AIR
AIR
AIR
EVAPORATOR
COIL
AIR
AIR
4
5
6
AIR
AIR
AIR
AIR
AIR
Figure 1: NHT25 and NJT30/T40 Vertical Airflow Arrangements
7
AIR
NOTE: *If required, some air can be returned through the bottom of the evaporator section
8
9
AIR
AIR
AIR
AIR
11
AIR
AIR
AIR
AIR
10
12
AIR
AIR
AIR
Figure 2: NHT25 and NJT30/T40 Horizontal Airflow Arrangements
6
Johnson Controls Unitary Products
5121846-TIM-A-0515
NJT50 Air Discharge
When arranged horizontally, the evaporator section can be set
directly on the floor, but a 9" support is required under the
blower section for stability. The support should extend the full
width of the blower section and be located under the edge away
from the evaporator section.
The NJT50 blower and MACZ-50 evaporator sections are
shipped separately and must be joined together in the field. The
blower section can be mounted either above the evaporator for
a vertical positioning or beside the coil for horizontal
positioning. Both vertical and horizontal positions can be
arranged for upward, downward, or horizontal air discharge.
The evaporator and blower sections may be assembled
together as shown in Figure 3. All arrangements are possible by
rearranging the panels as shown.
NOTE: Ductwork should never be used to support the blower
section. Refer to duct connection for more information.
When arranged vertically, the NJT50 can set directly on any
floor or platform that is capable of supporting its weight.
.
1
2
3
VERTICAL AIRFLOW ARRANGEMENTS
4
5
6
7
HORIZONTAL AIRFLOW ARRANGEMENTS
Figure 3: NJT50 & MACZ-50 Airflow Arrangements
Johnson Controls Unitary Products
7
5121846-TIM-A-0515
Unit Mounting
accessories include three suspension channels and hardware.
The channels extend across the evaporator section, the heating
section (if included) and the blower section. Each channel is to
be bolted to both sections as shown in Figures 4 thru 6. Refer to
Table 3 for mounting details and Tables 4 and 5 for unit weight
distribution.
The NH/NJ Series evaporator units may be suspended from
joists with isolation type hangers or hooks. Suspension
accessories 1HH0403 (NHT25 and NJT30), 1HH0404 (NJT40)
and 1HH0405 (NJT50 Air Handler with MACZ-50 Evaporator
Section) may be ordered separately. All Suspension
HORIZONTAL
UNIT SUSPENDED
FROM ABOVE 3
AX
D
BX
C
E
BX
VERTICAL UNIT SUPPORTED
FROM BELOW
3
BLOWER
SECTION
F
1-1/2
EVAP . COIL
SECTION
U3
O
U
B
BLOWER
SECTION
A
EVAP.
COIL
SECTION
A
HEATING COIL 2
F
SUSPENSION
ANGLES 1
E
C
D
CX
4
B
BX
BX
1 The same channels can be used in either position. When used to
support a vertical unit, these channels should be cut to match the
bottom dimension of the evaporator section.
2
The suspension channels have two sets of mounting holes to
accommodate horizontal units with or without a heating coil. On
a horizontal unit without a heating coil, the suspension channels
will extend 3” beyond both ends of the unit.
3 The same channels can be used to support a horizontal, floor-
mounted unit from below.
4 After these bottom channels are cut per Note 1, a new hole will have
to be drilled at the cut end if the unit is to be mounted on isolators.
Figure 4: NHT25/NJT30/NJT40 Weight Distribution With Suspension Application
8
Johnson Controls Unitary Products
5121846-TIM-A-0515
NOTE: The following illustration shows how the channels
should be secured to the unit using the hardware
provided with the suspension accessory.
(2) 9/16 HOLES FOR 1/2
HANGER RODS
SUSPENSION
CHANNEL
5/16 NUT,
FLATWASHER
5/16 NUT,
LOCKWASHER,
FLATWASHER
3
3/8 NUT (USED
AS SPACER)
UNIT PANEL
5/16 BOLT,
FLAT-WASHER
SIDE
PANEL
UNIT ANGLE
Figure 5: NHT25/NJT30/NJT40 Details For Securing Suspension Channels
BX
BX
AX
D
C
E
B
F
A
Figure 6: NJT50 & MACZ-50 Weight Distribution With Suspension Application
Johnson Controls Unitary Products
9
5121846-TIM-A-0515
NJT50 Mounting
When arranged horizontally (Figure 6), the NJT50 air handler
and MACZ-50 evaporator coil can be suspended from joists
with hanger rods using a suspension accessory.
The suspension channels require no drilling or cutting. Each
channel has enough holes in its bottom flange for:
1.
Four bolted connections to the evaporator coil section.
(Only two are used on the outside supports)
2.
One bolted connection to the heating coil section.
3.
Four bolted connections to the blower section. (Only two
are used on the outside supports)
See Figure 7 details for securing suspension channels.
When the heating section is not included, each channel will
extend 3" beyond the front and the rear of the unit. Bolt holes in
the bottom flange of each channel will still align with the holes
provided in the top framework of the evaporator section and the
blower section.
For both outside channels and for the Point 1 locations on the
center channel, the bolted connections are to be made where
the top sheet metal panels are attached to the unit framework.
The ¼” screws and cage nuts must be removed and may be
discarded. For the Point 2 locations on the center channel, the
bolted connections are to be made through the knockouts in the
top sheet metal panels. 5/16” cage nuts are provided in the unit
framework under these knockout locations. Note that these
cage nuts are part of the basic unit. They are not supplied with
the suspension accessory.
.
CENTER CHANNEL (Location “1” Figure 13)
CENTER CHANNEL (Location “2” Figure 13)
Figure 7: NJT50 & MACZ-50 Details For Securing Suspension Channels
10
Johnson Controls Unitary Products
5121846-TIM-A-0515
Table 3:
Unit Mounting Dimensions
DIMENSIONS, INCHES
UNIT
NHT25
AX
69-1/4
BX
49-1/16
CX
26-5/8
NJT30
69-1/4
49-1/16
26-5/8
NJT40
84
50-9/16
34
NJT50
87
51-1/2
~
Table 4:
Model
Corner Weights & Center of Gravity NH/NJ Units
Evaporator Blower Drive
Center of
4 Point Load Location (lbs.) 6 Point Load Location (lbs.)
Weight (lbs.)
Section
Section Section
Gravity
Drive HP
Cabinet
Cabinet Cabinet Shipp Opera
CG X CG Y
A
B
C
D
A
B
C
D
E
F
Wt (lb)
Wt (lb) Wt (lb) ing
ting
Vertical Airflow
NHT25
NJT30
NJT40
NJT50
MACZ-50
5
7.5
5.0
7.5
10
7.5
10
10
15
~
539
539
567
567
567
654
654
~
~
~
463
463
490
490
490
527
527
645
645
~
111
138
110
134
150
141
157
155
272
~
463
463
490
490
490
527
527
645
645
~
111
137.8
110.2
134
150
140.7
156.9
154.9
271.7
~
1067 1130
1067 1157
1122 1184
1122 1208
1122 1224
1246 1348
1246 1364
705 17421
705 18591
979
~
19.0
19.3
20.1
20.3
20.5
24.6
24.8
31.4
32.4
~
45.5
45.1
44.3
44.0
43.8
45.1
44.9
46.1
45.0
~
296
301
297
301
304
334
336
393
408
~
321
335
363
376
385
424
434
570
639
~
267
274
288
295
299
330
334
461
496
~
247
246
236
236
236
260
259
318
318
~
204
206
200
202
203
223
224
267
272
~
220
229
244
252
257
283
288
387
426
~
194
202
215
222
226
249
254
341
376
~
172
179
191
197
201
221
226
303
333
~
159
161
157
158
159
174
175
209
213
~
180
181
176
178
179
196
197
235
240
~
1067
1067
1122
1122
1122
1246
1246
705
705
979
35.2
35.4
36.4
36.5
36.6
43.1
43.2
52.1
52.5
~
45.5
45.1
44.3
44.0
43.8
45.1
44.9
46.1
45.0
~
320
329
332
339
345
387
392
446
480
~
297
307
328
338
344
371
378
517
567
~
247
252
260
265
268
288
291
418
440
~
266
269
264
266
268
301
303
361
373
~
220
225
224
227
230
258
261
303
320
~
204
210
221
226
230
248
251
351
378
~
180
185
195
199
202
218
221
309
333
~
160
164
173
177
180
194
196
275
296
~
172
176
175
178
180
202
204
237
250
~
194
198
197
200
203
228
230
267
282
~
Horizontal Airflow
NHT25
NJT30
NJT40
NJT50
MACZ-50
5
7.5
5.0
7.5
10
7.5
10
10
15
~
539
539
567
567
567
654
654
908.5
908.5
~
1130
1157
1184
1208
1224
1348
1364
17421
18591
~
1. Operating weight includes NJT50 Air handler and MACZ-50 Evaporator Coil Combined.
Y
(D) C
CG
(F)
(C)
A (A)
(B) B
Vertical
Johnson Controls Unitary Products
Y
(D) C
CG
(F)
X
MOTOR
X
D (E)
(C)
MOTOR
D (E)
A (A)
(B) B
Horizontal
11
5121846-TIM-A-0515
Table 5:
Accessory Operating Weight Distribution (Lbs)1
ACCESSORY
BASE2
HOT WATER COIL
STEAM COIL 1 ROW
NHT25
25
35
30
NJT30
25
35
30
NJT40
30
45
~
NJT50
~
35
~
1. These weights should be added to each point load in Table 4.
2. This accessory can only be applied on units installed in the vertical position.
Drain Connections
Refrigerant Mains
All drain lines MUST be trapped and located so they will not be
exposed to freezing temperatures.
The evaporator blower has 7/8” OD steel condensate stub at
each end of a single drain pan. Both ends are closed with
plastic caps. A plastic or rubber ell can be used. (Field supplied)
Attach the ell to the desired end and run a full size 7/8” drain
line to the nearest drain facility. Seal the cap at the unused end
with suitable mastic.
This Split-System (Air Condensing / Heat Pump / Air
Handling) unit is one component of an entire system. As
such it requires specific application considerations with
regard to the rest of the system (air handling unit, duct
design, condensing unit, refrigerant piping and control
scheme).
Failure to properly apply this equipment with the rest of
the system may result in premature failure and/or
reduced performance / increased costs. Warranty
coverage specifically excludes failures due to improper
application and Unitary Products specifically disclaims
any liability resulting from improper application.
Drain piping should be constructed as shown in Figure 8. The
3-inch dimension must equal or exceed the negative static
pressure developed by the supply air blowers. If it does not, the
condensate will not drain properly and may overflow the drain
pan. The trap must be at least 2-inches deep to maintain a
water seal under all operating conditions, especially when the
blowers are starting.
Please refer to the equipment Technical Guide,
Installation Manual and the piping applications bulletin
247077 or call the applications department for Unitary
Products @ 1-877-UPG-SERV for guidance.
Line Sizing
When sizing refrigerant pipe for a split-system air conditioner,
check the following:
Figure 8: Recommended Drain Piping
12
1.
Suction line pressure drop due to friction.
2.
Liquid line pressure drop due to friction.
3.
Suction line velocity for oil return.
4.
Liquid line pressure drop due to vertical rise. For certain
piping arrangements, different sizes of suction line pipe
may have to be used. The velocity of the refrigerant vapor
must always be great enough to carry the oil back to the
compressor.
5.
Evaporator Located Below Condenser - On a split
system where the evaporator blower is located below the
condenser, the suction line must be sized for both pressure
drop and for oil return.
6.
Condenser Located Below Evaporator - When the
condenser is located below the evaporator blower, the
liquid line must be designed for the pressure drop due to
both friction loss and vertical rise. If the pressure drop due
to vertical rise and friction exceeds 60 psi, some refrigerant
will flash before it reaches the thermal expansion valve.
Johnson Controls Unitary Products
5121846-TIM-A-0515
Flash gas:
1.
Increases the liquid line pressure loss due to friction that in
turn causes further flashing.
2.
Reduces the capacity of the refrigerant control device
which starves the evaporator.
3.
Erodes the seat of the refrigerant control device.
4.
Causes erratic control of the refrigerant entering the
evaporator.
Take Adequate Precautions
Many service problems can be avoided by taking adequate
precautions to provide an internally clean and dry system and
by using procedures and materials that conform to established
standards.
Use hard drawn copper tubing where no appreciable amount of
bending around pipes or other obstructions is necessary. If soft
copper is used, care should be taken to avoid sharp bends that
may cause a restriction. Pack fiberglass insulation and a
sealing material such as permagum around refrigerant lines
where they penetrate a wall to reduce vibrations and to retain
some flexibility.
Support all tubing at minimum intervals with suitable hangers,
brackets or clamps.
Braze all copper-to-copper joints with Silfos-5 or equivalent
brazing material. Do not use soft solder. Insulate all suction
lines with a minimum of 1/2" ARMAFLEX or equivalent that
meets local codes. Liquid lines exposed to direct sunlight and/
or high temperatures must also be insulated. Never solder
suction and liquid lines together. They can be taped together for
convenience and support purposes, but they must be
completely insulated from each other.
Before beginning installation of the main lines, be sure that the
evaporator section has not developed a leak in transit. Check
pressure at the Schrader valve located on the header of each
coil. If pressure still exists in the system, it can be assumed to
be leak free. If pressure DOES NOT exist the section will need
to be repaired before evacuation and charging is performed.
A filter-drier MUST be field-installed in the liquid line of every
system to prevent dirt and moisture from damaging the system.
Properly sized filter-driers are shipped with each condensing
section.
NOTE: Installing a filter-drier does not eliminate the need for
the proper evacuation of a system before it is charged.
A field-installed moisture indicating sight-glass should be
installed in the liquid line(s) between the filter-drier and the
evaporator coil. The moisture indicating sight-glass can be used
to check for excess moisture in the system .
The evaporator coil has copper sealing disks brazed over the
ends of the liquid and suction connections. The temperature
required to make or break a brazed joint is high enough to
cause oxidation of the copper unless an inert atmosphere is
provided.
Johnson Controls Unitary Products
NOTE: Dry Nitrogen should flow through the system at all
times when heat is being applied and until the joint has
cooled. The flow of Nitrogen will prevent oxidation of
the copper lines during installation.
Always punch a small hole in sealing disks before unbrazing to
prevent line pressure from blowing them off. Do not use a drill
as copper shavings can enter system.
NOTE: Solenoid and hot gas bypass valves (if used) should be
opened manually or electrically during brazing or
evacuating.
NOTE: Schrader valves located on service valves should have
their stems removed during brazing to prevent
damaging to the valves.
Line Installation
Start Installation of main lines at the condenser unit. Verify the
service valves are fully seated by screwing the stem of both
valves down into the valve body until it stops. Remove the
Schraded valve stem and connect a low-pressure nitrogen
source to the service port on the suction line valve body. Punch
a small hole in the sealing disk; the flow of Nitrogen will prevent
any debris from entering the system. Wrap the valve body with
a wet rag to prevent overheating during the brazing process.
Overheating the valve will damage the valve seals. Unbraze the
sealing disk, cool the valve body and prepare the joint for
connections of the main lines. Repeat for the liquid line valve
body.
Never remove a cap from an access port unless the
valve is fully back-seated with its valve stem in the
maximum counter-clockwise position because the
refrigerant charge will be lost. Always use a refrigeration
valve wrench to open and close these service valves.
Connect the main liquid line to the liquid line connection on the
condenser unit, while maintaining a flow of Nitrogen. Cool the
valve body and replace the Schraded valve stem on the service
port of the liquid line service valve.
Install the liquid line from the condenser unit to the evaporator
liquid connection, maintaining a flow of nitrogen during all
brazing operations.
The filter-drier and sight glass must be located in this line,
leaving the O.D. unit.
Connect a low-pressure nitrogen source to the Schrader valve
located on the evaporator section coil headers. Punch a small
hole in the sealing disks, the flow of Nitrogen will prevent any
debris from entering the system. Unbraze both liquid and
suction sealing disks and prepare the joints for connections of
the main lines.
Connect the main liquid line to the liquid line connection on the
evaporator section, while maintaining a flow of Nitrogen.
13
5121846-TIM-A-0515
Make the suction line connection at the evaporator and run the
line to the condenser unit. Connect the main suction line to the
suction line connection on the condenser unit, while maintaining
a flow of nitrogen. Cool the valve body and replace the
Schrader valve stem on the service port of the liquid line service
valve.
Once the brazing process is complete, leak testing should be
done on all interconnecting piping and the evaporator before
proper evacuation to 500 microns is performed. Once the line
set and evaporator section is properly evacuated the service
valves can be opened and the condensing unit is now ready to
charge with the appropriate weight of refrigerant.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system. Gage sets, hoses, refrigerant
containers and recovery systems must be designed to
handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in property
damage or injury.
NOTE: Ensure TXV bulbs are not crossed between systems.
Undesirable performance and possible compressor
damage may occur.
Liquid Line Solenoids
The unit is shipped with factory installed, normally closed, liquid
line solenoid valves. When the solenoid coil is energized with a
24-volt signal, the valve will open.
During brazing operations, the valves should be placed in the
OPEN position by removing the stem cap with a 9/16” wrench,
then rotating the exposed valve stem inward (CLOCKWISE)
approximately 10-12 full turns (from the fully CLOSED position)
using a 4” adjustable wrench.
The valve stems should be returned to the CLOSED
(COUNTER-CLOCKWISE) position prior to unit operation. The
“Pump-out” procedure is detailed in the following section.
The sequence of operation applies to the YH/YJ condensing
units and NH/NJ air handlers when applied as a matched
system. Non-matched systems will have to be field wired to
operate in a similar fashion as described on page 38.
NOTE: See Liquid Line Solenoid Wiring on pages 37, 38.
Pump Out
Wear safety glasses and gloves when handling
refrigerants. Failure to follow this warning can cause
serious personal injury.
This instruction covers the installation and operation of the
basic air handling unit. For refrigerant piping installation
instructions refer to document 247077 "Application Data General Piping Recommendations for Split System Air
Conditioning and Heat Pumps".
Expansion Valve Bulb Installation
NHT25
Thermal expansion valve bulbs are not factory-installed in their
final locations. They must be fastened in a 4 o'clock and 8
o'clock position to the common suction line of the evaporator
coil after piping connections are made. Use the bulb clamps
from the bag taped to the suction connection inside the blower
unit.
NJT30/NJT40/NJT50 With MACZ-50
Thermal expansion valve bulbs are not factory-installed in their
final locations. The bulb for System #1 must be fastened in a 4
o'clock or 8 o'clock position to the System #1 suction line
leaving the evaporator coil after piping connections are made.
Repeat the procedure for System #2, locating the bulb in a 4
o'clock or 8 o'clock position to the System #2 suction line. Use
the bulb clamps from the bag taped to the suction connection
inside the blower unit.
14
The pump out function is a standard feature on the 25 to 50 ton
systems. The pump out circuit is activated each time the first
and third compressor stage is called for by the thermostat. As
such, it’s a “Pump Out On Start Up” design. A normally closed
solenoid valve (POS1, 2, 3 or 4) is placed in the liquid line, just
prior to the expansion valve.
When cooling is not being called for by the thermostat, the
pump out solenoid (POS) is not energized, so it’s in the closed
position. When the Simplicity™ control receives a call for
cooling, it energizes a compressor. With the POS being closed,
it causes the pressure on the low side of the system to begin
falling.
When the low pressure switch (LPS) opens, the control board
energizes its on-board pump out relay, providing a 24 vac
output to an external relay used to energized the pump out
solenoid. The refrigeration circuit being controlled is not in
normal operating mode.
If the low pressure switch is already open on a call for cooling,
the pump out relay is energized immediately. If the LPS does
not open after 5 minutes, the pump out relay is energized.
Duct Connections
Ductwork should always be suspended with hangers or
supported by legs. It should never be fastened directly to the
building structure.
Allow clearance around ducts for safety in the handling of
heated air and for insulation when required.
Johnson Controls Unitary Products
5121846-TIM-A-0515
Insulation
Supply Air Ducts
Ductwork insulation should meet the following criteria:
See Figure 9 for suggested method of connecting supply air
ductwork. Non-flammable material collars should be used to
minimize the transmission of noise and/or vibration.
Be used when ducts pass through an unconditioned space in
the cooling season or through an unheated space during the
heating season.
Include a vapor barrier around the outside to prevent the
absorption of moisture.
Be no less than 2 inches thick with the weatherproof coating
when applied to ducts exposed to outdoor conditions.
Return Air Duct Angles
Return air duct angles are shipped turned in. They are intended
to be unscrewed and turned for connection of ductwork. The
return air grille accessory attaches in the same manner as the
panels.
DUCT
TRANSITION
NON-FLAMMABLE
COLLAR
DUCT
24"
AIR
OUTLET
BLOWER
GASKETS
(BY INSTALLER)
FLANGED DUCT
CONNECTION
(FIELD
FABRICATED)
Figure 9: Suggested Method For Connecting Ductwork
Johnson Controls Unitary Products
15
5121846-TIM-A-0515
Electrical Data
Table 6:
UNIT
MODEL
Electrical Data
HP
5
NHT25
7.5
5.0
NJT30
7.5
10
7.5
NJT40
10
10
NJT50
15
16
FLA
VOLTAGE
(3PH-60HZ)
MIN
CIRCUIT
AMPACITY
MAX.
FUSE
SIZE
(Amps)
16.7
15.2
7.6
6.1
24.2
22
11
9
16.7
15.2
7.6
6.1
24.2
22
11
9
30.8
28
14
11
24.2
22
11
9
30.8
28
14
11
30.8
28
14
11
46.2
42
21
17
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
208
230
460
575
21
19
10
8
30
28
14
11
21
19
10
8
30
28
14
11
39
35
18
14
30
28
14
11
39
35
18
14
39
35
18
14
58
53
26
21
35
30
15
15
50
45
20
20
35
30
15
15
50
45
20
20
60
60
30
20
50
45
20
20
60
60
30
20
60
60
30
20
100
90
45
35
Johnson Controls Unitary Products
5121846-TIM-A-0515
Table 7:
Overload Relay Kit
VOLTAGE
MOTOR HP
5
7.5
10
15
Table 8:
208/230V
460V
OVERLOAD KIT
2MP04708300
2MP04708400
2MP04708500
2MP04708700
2MP04708500
2MP04708700
2MP04708900
2MP04709000
575V
2MP04708300
2MP04708300
2MP04708400
2MP04708500
Overload Setting
VOLTAGE
MOTOR HP
5
7.5
10
15
208/230V
460V
575V
14/13
21/20
26/25
38/36
OVERLOAD SETTING (Full Load Amps)12
6.5
9.5
13
18
5
7.5
10
15
1. Motors with Service Factor of 1.15 or Greater: Adjust overload relay dial to the motor nameplate Full Load Amps (FLA).
2. Motors with Service Factor Less Than 1.15: Adjust overload relay dial based on the formula: Motor nameplate FLA x 0.90 = relay setting
Electrical Connections Air Handlers with Contactor
50 Ton Replacement Motor Contactor Installation
The electric box ships complete with motor contactor,
transformers, relays and terminal block for making field
connections.
Install a power supply to meet the requirements listed in Table 6.
All 25 - 50 ton split-system indoor units come equipped with a
40 amp motor contactor. However, 50 ton units with a field
installed 15 hp motor used in a 208 or 230 Volt application
require a 60 amp motor contactor. In these cases, the 40 amp
contactor must be replaced in the field with the 60 amp contactor that is provided with the overload relay kit. Follow the
instructions below to replace the factory installed 40 amp contactor with the supplied 60 amp contactor.
1. Disconnect electrical power to the unit. The unit may have
more than one power source.
Provide a disconnect switch and fusing as required.
2.
Install interconnecting control wiring between condensing
section, evaporator blower and room thermostat.
The 40 amp motor contactor is located in the unit control
box. Disconnect all wires to the contactor.
3.
Remove the two screws mounting the top of the contactor,
and loosen the one screw at the bottom. Slide out the 40
amp contactor.
4.
Mount the replacement 60 amp contactor by sliding the
bottom screw slot under the screw loosened in Step 3.
Replace the top two screws previously removed. Tighten
all three screws to fix the contactor against the control box
back plate. Make sure the 60 amp contactor is now
mounted in the same orientation as the 40 amp contactor
removed in Step 3.
5.
Install the overload relay supplied in the kit.
6.
Reconnect all wires, previously disconnected in Step 2, to
the new 60 amp contactor per unit wiring diagram (40 amp
contactor 60 amp contactor terminals are similar).
7.
Reconnect electrical power to unit.
NOTE: Remember: On air handlers with factory installed pump
out solenoids, wires to the solenoid must be field
connected.
Refer to Figures 29 thru 35 for Indoor Unit Wiring Diagrams.
Air Handlers are shipped without overload relays. These
must be ordered separately to match the selected motor
used in the air handler. See unit's Technical Guide or
price page for correct overload relay. On 50 ton units
with a 15 hp motor at 208 or 230 volts, the factory
installed motor contactor must be replaced with a 60
amp contactor provided with the motor overload relay
kit. Refer to 50 Ton Replacement Motor Contactor
Installation section.
NOTE: All unit models with contactor and overload relays,
the power wiring for the blower motor is supplied
with the overload relay kit.
Johnson Controls Unitary Products
17
5121846-TIM-A-0515
Table 9:
Unit Blower Motor Data
UNIT MODEL
HP
MOTOR KIT MODEL NUMBER
FRAME SIZE
2LP04605133
5
VOLTAGE
(3PH-60-HZ)
208/230/460
184
2LP04605158
575
2LP04607133
208/230/460
NHT25
7.5
213
2LP04607158
575
2LP04605133
208/230/460
5.0
NJT30
184
2LP04605158
575
2LP04607133
208/230/460
7.5
213
2LP04607158
575
2LP04610133
208/230/460
10
215
2LP04610158
575
2LP04607133
208/230/460
7.5
213
2LP04607158
575
2LP04610133
208/230/460
NJT40
10
215
2LP04610158
575
2LP04610133
208/230/460
10
215
2LP04610158
575
2LP04615133
208/230/460
NJT50
15
254
2LP04615158
Drive Packages
Units are shipped from the factory without the blower motor,
drives and overload relays. Blower motors, overload relays and
drive kits are ordered and shipped separately for field mounting.
All motors are 3-phase. Blower shafts are extended to allow the
blowers to be driven from either end. Motor rotation can be
reversed by changing the power supply wiring at the motor
terminal box.
NOTE: : All blower motors have solid bases and are not
inherently protected. For proper operation, these
motors require overload relays. Please see current
product price pages for overloads relay kits.
Motor Mounting
Units are shipped with a motor mounting assembly installed as
shown in Figure 10 for the NHT25, NJT30, NJT40 and Figure
12 for the NJT50.
The motor mounting arrangement can be changed to allow
motor access based on the airflow arrangement required. The
18
575
recommended motor location for each blower arrangement is
as follows.
Standard Motor Arrangement (NHT25/NJT30/NJT40)
The NHT25, NJT30 and NJT40 ship from the factory with a
motor mounting adapter plate for use with the 7.5 and 10 HP
motors. If a 5 HP motor is used, the adapter is not necessary
and should be removed and discarded.
The NHT25, NJT30 and NJT40 units are shipped with the motor
mount in location A as shown in Figure 10.
Optional Motor Arrangements are possible by moving the entire
motor mounting assembly (mounting plate, channels, etc.) to
the desired location.
NOTE: The blower section must be lifted off the evaporator
section to gain access to the mounting channel
fasteners. Since these sections have to be repositioned
for the Air Flow arrangements 2 through 10 and 12 of
Figures 1 and 2, the motor mounting assembly should
be relocated before the two sections are rejoined.
Johnson Controls Unitary Products
5121846-TIM-A-0515
AIR FLOW ARRANGEMENT 2, 6 OR 7
AIR FLOW ARRANGEMENT 1, 4, 8 OR 11
SEE
NOTES
A
B
C
D
SEE
NOTES
AIR FLOW ARRANGEMENT 3, 5 OR 10
AIR FLOW ARRANGEMENT 9 OR 12
SEE
NOTES
SEE
NOTES
C
B
NOTE: Since the motor mounting assembly cannot be
secured to the panel with the blower openings,
the motor cannot be installed in either of the
normally recommended bottom positions.
Figure 10: NHT25/NJT30/NJT40 Motor Arrangements As Seen In Figures 1 and 2
NJT50 Bearing Alignment:
Before the drive kit is installed, turn the blower assembly by
hand several times. If it doesn't rotate freely, the center bearing
may have been knocked out of alignment during shipping and/
or rigging. To realign, refer to Figure 11 and the following
instructions:
1.
Loosen the bearing collar set screw.
2.
With a drift pin in the bearing collar removal hole, loosen
the bearing collar by tapping the drift pin in the direction
opposite to the shaft rotation.
3.
Loosen bolts “A” and “B”.
4.
Remove the shim.
NOTE: The bearing support angle must be horizontal to the
unit and below the bearing.
5.
6.
Tighten bolts “A”.
7.
With a drift pin in the bearing collar removal hole, tighten
the bearing collar by tapping the drift pin once in the
direction of the shaft rotation.
8.
Tighten the bearing collar set screw.
9.
Loosen bolts “B”
10. Raise the blower shaft and re-install the shim between the
bearing and the bearing support angle.
11. Tighten bolts “B”.
NJT50 Motor Mounting
The motor mounting plate will accommodate a 10 or 15 HP
motor (Refer to Figure 13) and can be raised or lowered using
Tighten bolts “B” without the shim.
Johnson Controls Unitary Products
19
5121846-TIM-A-0515
NJT50 Motor Arrangements
B E A R IN G C O L L A R
S E T S C R E W
B E A R IN G
B E A R IN G
C O L L A R
B E A
C O L
R E M
H O L
B L O W E R
S H A F T
R IN G
L A R
O V A L
E
S H A F T
R O T A T IO N
B O L T "B "
B O L T "B "
The NJT50 unit is shipped with the motor mounting plate in the
standard location as shown in Figure 12.
The motor mounting plate can be re-located to three alternate
positions:
Alternate Position 1
1.
Remove pivot bolts from the mounting plate.
2.
Remove the mounting plate from the adjustment screws.
3.
Rotate mounting plate 180°.
4.
Fasten the mounting plate with pivot bolts removed in Step
1.
5.
Fasten mounting plate to the adjustment screws.
S H IM
B E A R IN G
S U P P O R T A N G L E
B O L T "A "
Figure 11: NJT50 Center Bearing
adjustment screws to cover the complete range of pulley
settings.
The physical size of the 15 HP motor reduces the adjustment
range of the motor mounting plate. To maximize this amount of
adjustment, one set of bolt holes is provided near the
adjustment screws on each end of the motor mounting plate
(Refer to Figure 13).
For some motor/blower wheel arrangements, however, the
motor cannot be mounted because the motor terminal box will
interfere with one of the blower section panels. To make these
motor/blower wheel arrangements possible, a second set of
bolt holes is provided near the pivot bolts on each end of the
motor mounting plate (See Figure 13).The 15 HP drive package
requires two different lengths of belts to vary the blower wheel
RPM over the complete range of rated conditions. When the
motor is mounted near the adjustment screws, the two lengths
of belt are interchangeable except for the higher and lower
limits of blower wheel RPM. When the motor is mounted near
the pivot bolts, the shorter length of belt is recommended for the
higher blower wheel RPM's and the longer length of belt is
recommended for the lower blower wheel RPM's. See Figure
12 for the recommended blower motor locations.
Alternate Position 2
The motor mounting plate, the pivot bolts and the adjustment
screws can be moved into a position similar to the one shown
as standard in Figure 13 but under the other blower scroll. The
framework under each blower scroll has the same bolt hole
arrangement.
Alternate Position 3
The motor mounting plate, the pivot bolts and the adjustment
screws can be moved into a position similar to the one detailed
in alternate position one but behind the other blower scroll. The
framework behind each blower scroll has the same bolt hole
arrangement.
1 5 H P
1 0 H P
1 5 H P
1 5 H P
A lte r n a tiv e P o s itio n
1 F o r P iv o t B o lts
1 5 H P
A lte r n a te
P o s itio n 3
F o r P iv o t B o lts
A d ju s tm e n t
S c r e w H o le s
A lte r n a tiv e P o s itio n
2 F o r P iv o t B o lts
1 0 H P
1 5 H P
A d ju s tm e n t
S c re w (2 )
M o to r M o u n tin g P la te
( S ta n d a r d L o c a tio n
a s S h ip p e d )
1 5 H P
Figure 13: NJT50 Motor Mount Plate
P iv o t B o lt ( 2 )
Figure 12: NJT50 Factory Motor Mounting Position
20
Johnson Controls Unitary Products
5121846-TIM-A-0515
Table 10: Unit Drive Data
UNIT MODEL
NHT25
NJT30
DRIVE KIT
MODEL
NUMBER
BLOWER
RPM
RANGE
1LD0440
1LD0407
ADJUSTABLE MOTOR PULLEY
FIXED BLOWER PULLEY
BELTS
PITCH DIA.
(IN.)
BORE
(IN.)
PITCH DIA.
(IN.)
BORE
(IN.)
QTY.
PITCH
LENGTH
(IN.)
DESIGNATION
600 - 750
4.0 - 5.0
1 1/8
12.0
1 3/16
2
63.3
A62
700 - 850
4.2 - 5.2
1 3/8
11.0
1 3/16
2
63.3
A62
1LD0442
780 - 940
5.3 - 6.3
1 3/8
12.0
1 3/16
2
63.3
A62
1LD0415
636 - 795
4.0 - 5.0
1 3/8
11.0
1 3/16
2
63.3
A62
1LD0407
668 - 827
4.2 - 5.2
1 3/8
11.0
1 3/16
2
63.3
A62
1LD0408
827 - 986
5.3 - 6.3
1 3/8
11.0
1 3/16
2
59.7
A59
1LD0409
607 - 776
4.3 - 5.5
1 3/8
12.4
1 3/16
2
85.1
B84
1LD0410
776 - 917
5.4 - 6.6
1 3/8
12.4
1 3/16
2
86.8
B85
1LD0411
692 - 833
4.8 - 6.0
1 3/8
12.4
1 3/16
2
78.6
B78
1LD0412
762 - 931
5.4 - 6.6
1 5/8
12.4
1 3/16
2
76.8
B75
NJT40
NJT50
Air System Adjustment
B
Refer to Tables 10 thru 13 to adjust the air system. Blower
motor pulleys are adjustable in 1/2 turn increments.
Twin Belt Drive Adjustment
A
E
To verify that both belts drive at the same speed, make a mark
across both belts. Turn the drive several revolutions by hand. If
the mark has not separated, the belts are traveling at the same
speed.
Twin groove blower motor pulleys should be installed with the
shaft set screw (A) towards the motor (See Figure 14).
To align pulleys, the housing of the twin groove motor pulley
may extend 25% of its length beyond end of motor shaft.
Always align twin groove pulleys using the stationary web.
Check belt tension. Drive packages are supplied with fiberglass
belts that must be properly tensioned at installation because
Johnson Controls Unitary Products
B
D
C
C
STATIONARY WEB
Figure 14: Double Groove Pulley
they do not stretch. The belt should deflect 3/16" per foot of belt
span with a 2 or 3-pound force. Alignment of the resilient motor
mount can be corrected by adjustment at the slots on the end
opposite the pulleys.
21
5121846-TIM-A-0515
Airflow Performance
Table 11: Fan Performance Data - 25 Ton
Available External Static Pressure - IWG
CFM
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5 HP Motor & Drive
7500
7.5 HP Motor & Drive
600
2.04
648
2.50
694
3.00
738
3.54
781
4.08
823
4.63
863
5.16
903
5.66
942
6.10
981
6.49
603
2.17
652
2.63
698
3.13
742
3.67
785
4.22
827
4.76
867
5.29
907
5.79
946
6.24
984
6.62
608
2.32
656
2.78
702
3.28
747
3.81
789
4.36
831
4.91
871
5.44
911
5.93
950
6.38
989
6.77
8250
613
2.48
661
2.93
707
3.44
752
3.97
795
4.52
836
5.07
877
5.60
916
6.09
955
6.54
994
6.92
8500
619
2.65
667
3.10
713
3.61
758
4.14
800
4.69
842
5.24
882
5.77
922
6.26
961
6.71
1000
7.09
7750
8000
5 HP & Field
supplied
Drive
8750
575
2.43
625
2.83
673
3.28
720
3.79
764
4.32
807
4.87
848
5.42
889
5.95
928
6.44
967
6.89
1006
7.27
9000
581
2.62
632
3.02
680
3.47
726
3.98
771
4.51
814
5.06
855
5.61
896
6.14
935
6.63
974
7.08
1013
7.46
9250
589
2.82
639
3.21
687
3.67
734
4.17
778
4.71
821
5.26
862
5.80
903
6.33
942
6.83
982
7.28
9500
596
3.02
647
3.42
695
3.88
741
4.38
786
4.91
829
5.46
870
6.01
910
6.54
950
7.03
989
7.48
9750
604
3.23
655
3.63
703
4.09
749
4.59
794
5.13
836
5.67
878
6.22
918
6.75
958
7.25
10000
613
3.45
663
3.85
711
4.31
758
4.81
802
5.34
845
5.89
886
6.44
927
6.97
966
7.46
10250
621
3.68
672
4.07
720
4.53
766
5.03
811
5.57
853
6.12
895
6.66
935
7.19
944
7.42
10500
630
3.9
680
4.30
729
4.76
775
5.26
819
5.80
862
6.34
904
6.89
10750
639
4.14
689
4.53
738
4.99
784
5.50
828
6.03
871
6.58
913
7.12
11000
648
4.37
699
4.77
747
5.23
793
5.73
837
6.27
880
6.82
922
7.36
11250
657
4.62
708
5.01
756
5.47
802
5.97
847
6.51
890
7.06
899
7.30
11500
667
4.86
717
5.26
766
5.71
812
6.22
856
6.75
11750
676
5.11
727
5.50
775
5.96
821
6.46
866
7.00
12000
686
5.36
737
5.75
785
6.21
831
6.71
876
7.25
12250
696
5.61
746
6.00
795
6.46
841
6.97
885
7.50
12500
706
5.86
756
6.26
805
6.72
851
7.22
High static 7.5 HP & Field Supplied Drive
Table 12: Fan Performance Data - 30 Ton
CFM
RPM
10,000
11,000
12,000
13,000
14,000
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
600
0.20
3.1
2.9
0.02
3.6
3.4
-
-
-
-
-
-
-
-
-
635
0.31
3.3
3.1
0.13
3.8
3.5
-
-
-
-
-
-
-
-
-
700
0.54
3.7
3.5
0.38
4.2
3.9
0.20
4.8
4.5
0.03
5.3
5.0
-
-
-
775
0.85
4.4
4.1
0.70
4.8
4.5
0.54
5.3
5.0
0.39
5.8
5.5
0.20
6.4
6.0
800
0.97
4.7
4.4
0.82
5.1
4.8
0.66
5.6
5.2
0.52
6.1
5.7
0.35
6.7
6.3
875
1.34
5.6
5.2
1.19
6.0
5.7
1.04
6.6
6.2
0.93
7.1
6.6
0.77
7.7
7.2
900
1.47
5.9
5.5
1.33
6.4
6.0
1.17
7.0
6.5
1.07
7.5
7.0
0.90
8.2
7.6
940
1.70
6.5
6.1
1.55
7.0
6.6
1.40
7.7
7.2
1.31
8.3
7.8
1.09
9.0
8.4
Table 13: Fan Performance Data - 40 Ton
CFM
RPM
22
12,800
14,400
16,000
17,600
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
600
0.84
6.0
5.2
0.63
7.2
6.2
0.40
8.4
7.2
660
1.19
7.3
6.3
1.00
8.5
7.3
0.78
9.8
8.5
0.13
9.7
8.4
0.50
11.2
700
1.42
8.2
7.1
1.25
9.4
8.1
1.03
10.7
9.7
9.2
-
-
760
1.78
9.5
8.2
1.63
10.8
9.3
-
-
-
-
-
-
800
2.02
10.4
9.0
1.89
11.8
10.2
-
-
-
-
-
-
-
Johnson Controls Unitary Products
5121846-TIM-A-0515
Table 14: Fan Performance Data - 50 Ton
CFM
RPM
16,000
18,000
20,000
22,000
SP
BHP
kW
SP
BHP
kW
SP
BHP
kW
SP
600
0.82
6.0
5.2
0.59
7.2
6.2
0.35
8.4
7.2
660
1.17
7.3
6.3
0.96
8.5
7.3
0.73
9.8
8.5
700
1.40
8.2
7.1
1.21
9.4
8.1
0.98
10.7
9.2
760
1.76
9.5
8.2
1.59
10.8
9.3
1.38
12.3
800
2.00
10.4
9.0
1.85
11.8
10.2
1.64
13.3
900
2.60
12.8
11.0
2.49
14.5
12.5
2.35
930
2.78
13.5
11.6
2.68
15.3
13.2
-
To check the supply air CFM after the initial
balancing has been completed:
1.
Drill two (2) 5/16-inch holes in the side panel as shown in
Figure 15.
2.
Insert at least 8 inches of 1/4 inch tubing into each of these
holes for sufficient penetration into the airflow on both
sides of the evaporator coil.
BHP
kW
0.08
9.7
8.4
-
-
-
0.45
11.2
9.7
0.14
12.7
11.0
0.70
12.2
10.5
0.40
13.7
11.8
10.6
1.11
13.8
11.9
0.81
15.6
13.5
11.5
1.38
14.9
12.9
1.09
16.9
14.6
16.0
13.8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4.
Using an inclined manometer, determine the pressure drop
across the dry evaporator coil. Since the moisture on an
evaporator coil may vary greatly, measuring the pressure
drop across the wet coil under field conditions would be
inaccurate. To assure a dry coil, the refrigerant system
should be de-activated while running the test.
BHP
kW
25"
5/16"
HOLE
EVAPORATOR
COIL
22"
5/16"
HOLE
Knowing the pressure drop across a dry coil, the actual
CFM through the unit can be determined from the curves
shown in Figures 16-19.
If the CFM is above or below the specified value, the supply air
motor pulley may have to be readjusted. After one hour of
operation, check the belt and pulleys for tightness and
alignment.
SP
After readings are obtained, remove the tubes and seal up the
drilled holes in the side panel. Dot plugs (P/N 9509) are
available through normal York parts ordering procedures.
7"
3.
24,000
14"
FILTERS
COIL SECTION
Figure 15: Hole Locations For Reading Coil Pressure Drop
Failure to properly adjust the total system air
quantity can result in extensive blower damage.
Johnson Controls Unitary Products
23
5121846-TIM-A-0515
Pressure Drop Across Dry Indoor Coil
0.70
0.60
I.W.C.
0.50
0.40
0.30
0.20
0.10
0.00
9000
11000
13000
15000
CFM
Figure 16: NHT25 - Pressure Drop Vs. Cfm Across Dry Indoor Coil
Pressure Drop Across Dry Indoor Coil
0.70
0.60
I.W.C.
0.50
0.40
0.30
0.20
0.10
0.00
9000
10000
11000
12000
13000
14000
15000
CFM
Figure 17: NJT30 - Pressure Drop Vs. Cfm Across Dry Indoor Coil
24
Johnson Controls Unitary Products
5121846-TIM-A-0515
Pressure Drop Across Dry Indoor Coil
0.70
0.60
I.W.C.
0.50
0.40
0.30
0.20
0.10
0.00
12000
14000
16000
18000
20000
CFM
Figure 18: NJT40 - Pressure Drop Vs. Cfm Across Dry Indoor Coil
Pressure Drop Across Dry Indoor Coil
0.70
0.60
I.W.C.
0.50
0.40
0.30
0.20
0.10
0.00
15000
17000
19000
21000
23000
25000
CFM
Figure 19: NJT50 & MACZ-50 - Pressure Drop Vs. Cfm Across Dry Indoor Coil
Johnson Controls Unitary Products
25
5121846-TIM-A-0515
TOP
22.0
62.4
22.5
5.3
22.0
5.3
2.6
9.1
3.0
19.0
SUPPLY
AIR
SUPPLY
AIR
4X Ø.88 K0
CONTROLS
CONNECTION
15.9
Ø 0.88 K0
ELECTRIC HEAT
CONNECTION
57.7
FRONT
SIDE
36.7
RETURN
AIR
RETURN
AIR
74.6
Ø 1.38 KO
Ø 0.88 LIQUID
CONNECTION
37.3
33.2
Ø 2.13 SUCTION
CONNECTION
25.0
Ø 0.88 DRAIN
CONNECTION
7.6
3.5
2.4
3.4
4.1
4.2
0.1
95.6
100.1
38.1
Figure 20: NHT25 Unit Dimensions
26
Johnson Controls Unitary Products
5121846-TIM-A-0515
HORIZONTAL CONFIGURATION
RETURN
AIR
SUPPLY
AIR
73.3
74.0
Figure 21: NHT25 Unit Dimensions (Continued)
Johnson Controls Unitary Products
27
5121846-TIM-A-0515
TOP
22.0
62.4
22.0
22.5
5.3
5.3
2.6
9.1
3.0
19.0
SUPPLY
AIR
SUPPLY
AIR
4X Ø0.88 KO
CONTROLS
CONNECTION
15.9
Ø0.88 KO
ELECTRIC HEAT
CONNECTION
57.7
FRONT
SIDE
36.7
RETURN
AIR
Ø0.88 LIQUID
CONNECTION
SYSTEM 1
RETURN
AIR
74.7
Ø0.88 LIQUID
CONNECTION
SYSTEM 2
5.9
37.3
Ø1.125 SUCTION
CONNECTION
SYSTEM 1
33.2
23.6
Ø0.88 DRAIN
CONNECTION
3.6 5.5
2.4
0.63
95.6
100.1
Ø1.125 SUCTION
CONNECTION
SYSTEM 2
38.1
3.4
4.1
6.1
5.1
Figure 22: NJT30 Unit Dimensions
28
Johnson Controls Unitary Products
5121846-TIM-A-0515
HORIZONTAL CONFIGURATION
RETURN
AIR
SUPPLY
AIR
73.3
74.0
Figure 23: NJT30 Unit Dimensions (Continued)
Johnson Controls Unitary Products
29
5121846-TIM-A-0515
TOP
60.5
20.6
22.0
22.0
5.3
5.3
2.6
5.5
3.0
19.0
SUPPLY
AIR
4X Ø0.88 KO
CONTROLS
CONNECTION
SUPPLY
AIR
FRONT
SIDE
44.0
RETURN
AIR
RETURN
AIR
Ø0.88 LIQUID
CONNECTION
SYSTEM 1
89.4
Ø0.88 LIQUID
CONNECTION
SYSTEM 2
10.1
44.7
40.5
Ø1.375 SUCTION
CONNECTION 23.1
SYSTEM 1
3.5
2.4
0.63
98.5
103.1
105.1
Ø1.375 SUCTION
CONNECTION
SYSTEM 2
3.2
4.3
4.5
7.1
7.9
7.6
Ø0.88 DRAIN
CONNECTION
45.4
Figure 24: NJT40 Unit Dimensions
30
Johnson Controls Unitary Products
5121846-TIM-A-0515
HORIZONTAL CONFIGURATION
RETURN
AIR
SUPPLY
AIR
88.2
88.8
Figure 25: NJT40 Unit Dimensions (Continued)
Johnson Controls Unitary Products
31
5121846-TIM-A-0515
TOP
103.1
18.5
61.7
23.0
23.0
Ø0.88 KO
CONTROLS
CONNECTION
2.6
24.9
Ø1.13 KO
CONTROLS
CONNECTION
SUPPLY
AIR
SUPPLY
AIR
Ø1.38 KO
CONTROLS
CONNECTION
7.8
9.1
6.1
4.6
6.1
DETIAL A
SCALE 0.375
(2X TYP)
SEE DETAIL A
FRONT
SUPPLY
AIR
SIDE
SUPPLY
AIR
45.4
44.0
45.5
Figure 26: NJT50 Unit Dimensions
32
Johnson Controls Unitary Products
5121846-TIM-A-0515
TOP
53.7
FRONT
RETURN
AIR
SIDE
RETURN
AIR
Ø0.88 LIQUID
CONNECTION
SYSTEM 1
Ø0.88 LIQUID
CONNECTION
SYSTEM 2
10.2
54.4
49.5
27.6
13.3
3.4
2.4
2.3
98.5
103.1
105.1
Ø2.13 SUCTION
CONNECTION Ø2.13 SUCTION
SYSTEM 1
CONNECTION
SYSTEM 2
53.7
3.2
6.7
7.6
7.3
Ø.88 DRAIN
CONNECTION
Figure 27: MACZ-50 Evaporator Section Dimensions
Johnson Controls Unitary Products
33
5121846-TIM-A-0515
VERTICAL CONFIGURATION
FRONT
SIDE
45.5
SUPPLY
AIR
SUPPLY
AIR
RETURN
AIR
RETURN
AIR
99.0
97.8
54.4
103.1
53.7
105.1
HORIZONTAL CONFIGURATION
NAMEPLATE
RETURN
AIR
SUPPLY
AIR
97.2
98.4
Figure 28: NJT50 Air handler & MACZ-50 Evaporator Coil Dimensions
34
Johnson Controls Unitary Products
5121846-TIM-A-0515
Table 15: Unit Connection Sizes
Model
Dimensions (inches)
NHT25
NJT30
NJT40
NJT50
MACZ-50A
Length
Width
Height
100.1
38.1
74.6
100.1
38.1
74.7
103.1
45.4
89.4
103.1
45.5
45.4
103.1
53.7
54.4
1
2 1/8
7/8
7/8
7/8
7/8
2
1 1/8
7/8
7/8
7/8
7/8
2
1 3/8
7/8
7/8
7/8
7/8
1 3/8
7/8
-
2
2 1/8
7/8
7/8
2
19.0
22.0
2
19.0
22.0
2
19.0
22.0
2
24.9
23.0
-
33.2
95.6
33.2
95.6
40.5
98.5
-
49.5
98.5
System Data
No. Refrigeration Circuits
Suction Line OD (in.)
Liquid Line OD (in.)
Power Wiring Knockout
Control Wiring Knockout
Drain Line
Blower Outlet
Number
Width
Length
Return Air Inlet
Width
Length
Maintenance
Filters must be cleaned or replaced as often as necessary to
assure good airflow and filtration.
To remove filters through the sides of the unit, remove either
the solid side panel on the piping end, or the larger side panel
on the end opposite the piping.
To remove the filters from the front of the unit, loosen 2 screws
and raise the top filter retainer. The upper filters can be lifted
over the center filter lip. Three wing nuts are provided under the
center filter retainer. Remove these and a part of the center
filter support, giving access to the bottom filters.
Drain pan(s) should be inspected regularly to assure proper
drainage.
The evaporator blower bearings and blower motor bearings are
permanently lubricated.
Johnson Controls Unitary Products
35
5121846-TIM-A-0515
Typical Wiring Diagrams
Figure 29: Typical NC300 Indoor Unit Wiring Diagram (Contactor)
36
Johnson Controls Unitary Products
5121846-TIM-A-0515
Figure 30: Typical ND360, 480 & 600 Indoor Unit Wiring Diagram (Contactor)
Johnson Controls Unitary Products
37
5121846-TIM-A-0515
Figure 31: Typical Field Wiring Diagram - NHT25 Evaporator Unit with YHT25 Condenser Unit
NOTE: On non NH/NJ Evaporator models, isolation relays must be installed to avoid overloading on 75 VA transformers on the
condensing unit.
Figure 32: Typical NHT25 Liquid Line Solenoid Wiring
38
Johnson Controls Unitary Products
5121846-TIM-A-0515
Figure 33: Typical Field Wiring Diagram NJT30/T40 Evaporator Units, NJT50 Air Handler and MACZ-50A Evaporator Coil
when Matched with YJ-30/T40/T50 Condenser
NOTE: On non NJ evaporator models, isolation relays must be installed to avoid overloading on 75VA transformers on the
condensing unit.
Figure 34: Typical NJT30/T40 & MACZ-50A Liquid Line Solenoid
Johnson Controls Unitary Products
39
5121846-TIM-A-0515
Standard Terminal Block on NHT25, NJT30/T40
and NJT50 with MACZ-50A models. On non NH/NJ
models isolation relays must be installed to avoid
overloading on 75 VA transformer on condensing
unit.
Primary side of transformer
connect to line side of power
supply.
Primary side of transformer
connect to line side of power
supply.
Non NH/NJ units may not include any or all of
the components required to wire the unit. Use
the diagram as general reference only.
Figure 35: Typical Liquid Line Solenoid Wiring
40
Johnson Controls Unitary Products
5121846-TIM-A-0515
Start-Up Sheet
START-UP & SERVICE DATA INSTRUCTION
COMMERCIAL SPLIT SYSTEMS
7.5 To 50.0 TON
START-UP CHECKLIST
Date: ________________________________________________________________________________________________________
Job Name: ___________________________________________________________________________________________________
Customer Name: ______________________________________________________________________________________________
Address: _____________________________________________________________________________________________________
City: ______________________________ State: ______________________________ Zip: ________________________________
Evaporator Model Number: _______________________________ Serial Number:___________________________________________
Condenser Model Number: _______________________________ Serial Number:___________________________________________
Qualified Start-up Technician: _________________________________ Signature: __________________________________________
HVAC Contractor: _________________________________________________________ Phone: ______________________________
Address: _____________________________________________________________________________________________________
Contractor’s E-mail Address: _____________________________________________________________________________________
Electrical Contractor: _________________________________________________________ Phone:___________________________
Distributor Name: ___________________________________________________________ Phone: ___________________________
WARRANTY STATEMENT
Johnson Controls/UPG is confident that this equipment will
operate to the owner's satisfaction if the proper procedures are
followed and checks are made at initial start-up. This confidence is
supported by the 30 day dealer protection coverage portion of our
standard warranty policy which states that Johnson Controls/UPG
will cover parts and labor on new equipment start-up failures that
are caused by a defect in factory workmanship or material, for a
period of 30 days from installation. Refer to current standard
warranty policy and warranty manual found on UPGnet for details.
In the event that communication with Johnson Controls/UPG is
required regarding technical and/or warranty concerns, all parties
to the discussion should have a copy of the equipment start-up
sheet for reference. A copy of the original start-up sheet should be
filed with the Technical Services Department.
The packaged unit is available in constant or variable air volume
versions with a large variety of custom options and accessories
available. Therefore, some variation in the startup procedure will
exist depending upon the products capacity, control system,
options and accessories installed.
This start-up sheet covers all startup check points common to all
package equipment. In addition it covers essential startup check
points for a number of common installation options. Depending
upon the particular unit being started not all sections of this startup
sheet will apply. Complete those sections applicable and use the
notes section to record any additional information pertinent to your
particular installation.
Warranty claims are to be made through the distributor from whom
the equipment was purchased.
EQUIPMENT STARTUP
Use the local LCD or Mobile Access Portal (MAP) Gateway to
complete the start-up.
A copy of the completed start-up sheet should be kept on file
by the distributor providing the equipment and a copy sent to:
Johnson Controls/UPG
Technical Services Department
5005 York Drive
Norman, OK 73069
1034350-UCL-B-1114
Johnson Controls Unitary Products
41
5121846-TIM-A-0515
1034350-UCL-B-1114
SAFETY WARNINGS
The inspections and recording of data outlined in this procedure
are required for start-up of Johnson Controls/UPG's packaged
products. Industry recognized safety standards and practices
must be observed at all times. General industry knowledge and
experience are required to assure technician safety. It is the
responsibility of the technician to assess all potential dangers
and take all steps warranted to perform the work in a safe
manner. By addressing those potential dangers, prior to
beginning any work, the technician can perform the work in a
safe manner with minimal risk of injury.
Lethal voltages are present during some start-up
checks. Extreme caution must be used at all times.
Moving parts may be exposed during some startup
checks. Extreme caution must be used at all times.
NOTE: Read and review this entire document before beginning
any of the startup procedures.
DESIGN APPLICATION INFORMATION
This information will be available from the specifying engineer
who selected the equipment. If the system is a VAV system the
CFM will be the airflow when the remote VAV boxes are in the
full open position and the frequency drive is operating at 60 HZ.
Do not proceed with the equipment start-up without the
design CFM information.
Design Supply Air CFM: __________________________ Design Return Air CFM:______________________________________
Design Outdoor Air CFM At Minimum Position: ________________________________________________________
Total External Static Pressure: _____________________________________________________________________
Supply Static Pressure: __________________________________________________________________________
Return Static Pressure: __________________________________________________________________________
Design Building Static Pressure: ___________________________________________________________________
ADDITIONAL APPLICATION NOTES FROM SPECIFYING ENGINEER:
2
42
Unitary Products Group
Johnson Controls Unitary Products
5121846-TIM-A-0515
1034350-UCL-B-1114
REFERENCE
General Inspection
Completed
See Notes
Unit inspected for shipping, storage, or rigging damage
…
…
Unit installed with proper clearances
…
…
Unit installed within slope limitations
…
…
Refrigeration system checked for gross leaks (presence of oil)
…
…
Terminal screws and wiring connections checked for tightness
…
…
Filters installed correctly and clean
…
…
Condensate drain trapped properly, refer to Installation Manual
…
…
All field wiring (power and control) complete
…
…
Refrigerant Line Inspection
Is Condenser below Evaporator?
System 1
Yes …
No …
System 2
Yes …
No …
Total Line Length end to end.
_______ Ft.
_______ Ft.
Vertical Lift in Ft.
_______ Ft.
_______ Ft.
Vertical Fall in Ft.
_______ Ft.
_______ Ft.
Number of Elbows?
_______ Ea.
_______ Ea.
Liquid Line Size
_______ Ea.
_______ Ea.
Suction Line Size
_______ Ea.
_______ Ea.
Solenoid Valve?
Yes …
No …
Yes …
No …
Check Valves?
Yes …
No …
Yes …
No …
Check Valves / Solenoid arrangements installed as per UPG Piping Guide
Yes …
No …
Yes …
No …
Oil Separator ?
Yes …
No …
Yes …
No …
Accumulator ?
Yes …
No …
Yes …
No …
TXV - Hard shutoff
Yes …
No …
Yes …
No …
Heatpump
Yes …
No …
Yes …
No …
Completed
See Notes
Alignment of drive components
Air Moving Inspection
…
…
Belt tension adjusted properly
…
…
Blower pulleys tight on shaft, bearing set screws tight, wheel tight to shaft
…
…
Pressure switch or transducer tubing installed properly
…
…
Unitary Products Group
Johnson Controls Unitary Products
3
43
5121846-TIM-A-0515
1034350-UCL-B-1114
Operating Measurements - Air Flow
Fan operates with proper rotation ID Fans …Exh. Fans …Cond. Fans …
Pressure drop across dry evaporator coil (At maximum design CFM) 1
IWC
External Static Pressure
IWC
Return Static Pressure
IWC
Supply Static Pressure
IWC
Supply Air CFM Using Dry Coil Chart
CFM
Final Adjusted Supply Air CFM2
CFM
1. Consult the proper airflow to pressure drop table to obtain the actual airflow at the measured pressure differential.
2. Was a motor pulley adjustment or change required to obtain the correct airflow?
Was it necessary to increase of decrease the airflow to meet the design conditions?
If the motor pulley size was changed, measure the outside diameters of the motor and blower pulleys and record those diameters here;
Blower Motor HP _______________________________ FLA________ RPM________
Pulley Pitch Diameter ______________Turns Out________ Final Turns Out________
Blower Pulley Pitch Diameter ________________ Fixed Sheave_________________
ELECTRICAL DATA
T1 - T2 ____________________________ Volts
T2 - T3 ____________________________ Volts
Control Voltage ______________________ Volts
T1 - T3 ____________________________ Volts
Device
Measured
List All Three Amperages
Nameplate
Supply Fan Motor1,2
AMPS
AMPS
Condenser Fan #1
AMPS
AMPS
Condenser Fan #2 (if equipped)
AMPS
AMPS
Condenser Fan #3 (if equipped)
AMPS
AMPS
Condenser Fan #4 (if equipped)
AMPS
AMPS
Compressor #1
AMPS
AMPS
Compressor #2 (if equipped)
AMPS
AMPS
Compressor #3 (if equipped)
AMPS
AMPS
Compressor #4 (if equipped)
AMPS
AMPS
1. VAV units with heat section - simulate heat call to drive VAV boxes and VFD/IGV to maximum design airflow position.
2. VAV units without heat section - VAV boxes must be set to maximum design airflow position.
Notes above apply for 3rd party application only.
4
44
Unitary Products Group
Johnson Controls Unitary Products
5121846-TIM-A-0515
1034350-UCL-B-1114
OPERATING MEASUREMENTS - COOLING
Discharge
Pressure
Stage
Liquid Line
Suction
Discharge Pressure At Liquid Line
Subcooling2
Pressure
Service
Temp.1
Temp.
Valve
Suction
Temp.
Superheat
First3
#
°
#
°
°
#
°
°
Second (if equipped)
#
°
#
°
°
#
°
°
Third (if equipped)
#
°
#
°
°
#
°
°
Fourth (if equipped)
#
°
#
°
°
#
°
°
Heat Pump 1st Stage
#
°
#
°
°
#
°
°
1. Liquid line temperature should be taken before filter/drier.
2. Subtract 10 psi from discharge pressure for estimated liquid line pressure
3. If Rawal valve installed, contact Technical Service.
Outside air temperature
________________ db °F
________________ wb °F
________________ RH%
Return Air Temperature
________________ db °F
________________ wb °F
________________ RH%
Mixed Air Temperature
________________ db °F
________________ wb °F
________________ RH%
Supply Air Temperature
________________ db °F
________________ wb °F
________________ RH%
REFRIGERANT SAFETIES
Completed
See Notes
Prove Compressor Rotation (3 phase only) by guage pressure
Action
…
…
Prove High Pressure Safety, All Systems
…
…
Prove Low Pressure Safety, All Systems
…
…
OPERATING MEASUREMENTS ELECTRIC HEATING
Heater kW
____________kW
Heater Voltage, Nameplate ____________ Volts
Heater Model Number: _______________________________
Serial Number: ______________________________________
Heater
Nameplate
Measured List All Three Amperages
Stage 1
_________AMPS
_________AMPS
_________AMPS
_________AMPS
Stage 2
_________AMPS
_________AMPS
_________AMPS
_________AMPS
Stage 3
_________AMPS
_________AMPS
_________AMPS
_________AMPS
Stage 4
_________AMPS
_________AMPS
_________AMPS
_________AMPS
Checked Heater Limit
Yes …
No …
Air Moving Switch Installed?
Yes …
No …
Unitary Products Group
Johnson Controls Unitary Products
5
45
OPERATIONAL MEASUREMENTS - STAGING CONTROLS
Verify Proper Operation of Heating/Cooling Staging Controls
Create a cooling demand at the Thermostat, BAS System or Simplicity SE
Verify that cooling/economizer stages are energized.
…
Create a heating demand at the Thermostat, BAS System or Simplicity SE
Verify that heating stages are energized.
…
Verify Proper Operation of the Variable Frequency Drive (If Required)
Verify that motor speed modulates with duct pressure change.
…
FINAL - INSPECTION
Verify that all operational control set points have been set to desired value
Scroll through all setpoints and change as may be necessary to suit the occupant requirements.
…
Verify that all option parameters are correct
Scroll through all option parameters and ensure that all installed options are enabled in the software and all
others are disabled in the software. (Factory software settings should match the installed options)
…
Verify that all access panels have been closed and secured
…
OBSERVED PRODUCT DIFFICIENCIES & CONCERNS:
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
Subject to change without notice. Printed in U.S.A.
Copyright © 2015 by Johnson Controls, Inc. All rights reserved.
York International Corporation
5005 York Drive
Norman, OK 73069
5121846-TIM-A-0515
Supersedes: Nothing