Installation and Maintenance Manual IM 1059-11

Installation and Maintenance Manual
IM 1059-11
Group: WSHP
Part Number: 910228803
Date: January 2018
Enfinity™ Large Capacity Vertical
Water Source Heat Pumps
LVC Standard Range & LVW Extended Range
Unit Sizes 072 – 290 (6 to 25 Tons) – R-410A Refrigerant
Contents
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . 33
Prior To Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MicroTech III controller with I/O expansion module with
hot gas reheat (HGRH)
208/230, 460, 575-60-3 (1.5 hp or less) . . . . . . . . . . 33
Receiving and storage . . . . . . . . . . . . . . . . . . . . . . . . 4
Pre-installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MicroTech III controller with I/O expansion module with
hot gas reheat (HGRH)
208/230, 460, 575-60-3 (greater than 1.5 hp) . . . . . 34
Installation Considerations . . . . . . . . . . . . . . . . . . . . 5
Unit location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MicroTech III controller with I/O expansion module –
with waterside economizer (WSE)
208/230, 460, 575-60-3 . . . . . . . . . . . . . . . . . . . . . . 35
Fan deck arrangements . . . . . . . . . . . . . . . . . . . . . . . 5
Vibration isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Air balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ductwork and attenuation . . . . . . . . . . . . . . . . . . . . . 8
MicroTech III controller with I/O expansion module –
with waterside economizer (WSE)
208/230, 460, 575-60-3 . . . . . . . . . . . . . . . . . . . . . . 36
Ventilation air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermostats & Wall Sensors . . . . . . . . . . . . . . . . . . 37
Accessory 2" deep filter rack kit with return air duct
flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermostat connections . . . . . . . . . . . . . . . . . . . . . . 37
Additional Accessories . . . . . . . . . . . . . . . . . . . . . . . 41
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Condensate Drain Connection . . . . . . . . . . . . . . . . . 12
MicroTech III unit controller and I/O expansion module
status LED's and fault outputs . . . . . . . . . . . . . . . . . 42
Typical Piping With Optional Waterside Economizer 13
MicroTech III unit controller LED faults and remedy . 43
Typical WSE field provided and installed jumper piping
routing details –
LVC/LVW– sizes 072-120, right-hand . . . . . . . . . . . 15
I/O expansion module LED faults and remedy . . . . . 45
Sheave Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LVC/LVW – sizes 072-120, left-hand . . . . . . . . . . . . 16
Typical WSE field provided and installed jumper piping
routing details –
LVC/LVW– sizes 180-290, right-hand . . . . . . . . . . . 17
Additional troubleshooting for size 290 only . . . . . . . 46
Troubleshooting water source heat pump units . . . . 47
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 49
Typical Refrigeration Cycles . . . . . . . . . . . . . . . . . . 50
Water source heat pump equipment check, test and
start form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
LVC/LVW – sizes 180-290, left-hand . . . . . . . . . . . . 18
Water System Quality . . . . . . . . . . . . . . . . . . . . . . . . 19
Cleaning & flushing system . . . . . . . . . . . . . . . . . . . 20
Operating limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Antifreeze correction factors . . . . . . . . . . . . . . . . . . 22
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Control options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
MicroTech® III controller . . . . . . . . . . . . . . . . . . . . . . 26
MicroTech III unit controller and I/O expansion module
terminals, locations and descriptions . . . . . . . . . . . . 29
MicroTech® III controller with LonWorks® or BACnet®
communication module . . . . . . . . . . . . . . . . . . . . . . 32
IM 1059-11 LARGE VERTICAL WSHP
2
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Model Nomenclature
Category
Product Category
Code Item
Code Position
01
1
Code Designation & Description
W
=
Water Source Heat Pump
Product Identifier 022-4
LVC = R-410A, Floor Mounted, Standard Range
LVW = R-410A, Floor Mounted, Extended Range
Design Series (Vintage) 03
5
1
Nominal Capacity 04
6-8
072
096
120
180
215
290
=
Design Series 1
=
=
=
=
=
=
72,000 Btuh Nominal Cooling
96,000 Btuh Nominal Cooling
120,000 Btuh Nominal Cooling
180,000 Btuh Nominal Cooling
215,000 Btuh Nominal Cooling
290,000 Btuh Nominal Cooling
Control Board Option
059
B=
MicroTech® III Unit Controller
A=
DDC-Less Board (Alerton Rep Option)
Network Module Option 06
10
L=
Lon Module
B =BACnet
F
= BACnet - WSHP System
Y =None
Condensate Overflow Protection07
11S=
Standard Overflow Sensor
Freeze Fault Protection
13
09
Voltage 11
15
Return Air
F=
Freeze Fault Protection
D
H
K
L
1317
Y
= 208-60-3
=230-60-3
= 460-60-3
= 575-60-3
=
Front Return
Discharge Air
1418
T
=
U
=
F
=
Top Horizontal Discharge
Upblast Rear
Upblast Front
Blower Motor15
19-20
01
=
02
=
Belt Drive – Integral HP Motor
High Static
Construction Type
17
23
A
= Standard 1/2" Fiberglass Insulation
B
= Closed Cell Foam Insulation
F=
Standard 1/2" Fiberglass Insulation w/Compressor Sound Blankets
G=
Closed Cell Foam Insulation w/Compressor Sound Blankets
Water To Refrigerant Heat Exchanger
18
24
Construction
C
S
=
=
Copper Inner Tube - Steel Outer Tube
Cupro-nickel Inner Tube - Steel Outer Tube
Secondary Heating/Cooling Option
W
=
Waterside Economizer (Not to be combined with HGRH)
19
25
Dehumidification
20
26-27
AA = Hot Gas Reheat (Not to be combined with WSE)
YY =None
Piping Hand
21
28
L
R
=
=
Left Side Pipe Connections
Right Side Pipe Connections
Filter Options
23
32-34
SD1
M08
M13
N02
N00
=
=
=
=
=
Standard 1" Disposable filter
Merv 8 in 2" frame
Merv 13 in 4" frame
No Filter with 2" Filter Rack (Low Leak)
No Filter-No Filter Rack
Condensate Drain Pan
27
41-42
GL
SS
=
=
Galvanized Steel
Stainless Steel
Control Transformer Option
29
44-46
050
=
50VA Control Transformer
075 = 75VA Control Transformer
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LARGE VERTICAL WSHP IM 1059-11
Prior To Installing
Receiving and storage
Pre-installation
CAUTION
CAUTION
Sharp edges can cause personal injury. Avoid contact with them.
Use care and wear protective clothing, safety glasses and gloves
when handling parts and servicing heat pumps.
Upon receipt of the equipment, check carton for visible
damage. Make a notation on the shipper’s delivery
ticket before signing. If there is any evidence of rough
handling, immediately open the cartons to check for
concealed damage. If any damage is found, notify
the carrier within 48 hours to establish your claim and
request their inspection and a report. The Warranty
Claims Department should then be contacted.
Do not stand or transport the machines on end. For
storing, each carton is marked with “up” arrows.
In the event that elevator transfer makes up-ended
positioning unavoidable, do not operate the machine
until it has been in the normal upright position for at least
24 hours.
Temporary storage at the job site must be indoor,
completely sheltered from rain, snow, etc. High or low
temperatures naturally associated with weather patterns
will not harm the units. Excessively high temperatures,
140°F (60°C) and higher, may deteriorate certain plastic
materials and cause permanent damage.
IMPORTANT
This product was carefully packed and thoroughly inspected
before leaving the factory. Responsibility for its safe delivery
was assumed by the carrier upon acceptance of the
shipment. Claims for loss or damage sustained in transit
must therefore be made upon the carrier as follows:
VISIBLE LOSS OR DAMAGE
Any external evidence of loss or damage must be noted
on the freight bill or carrier’s receipt, and signed by the
carrier’s agent. Failure to adequately describe such external
evidence of loss or damage may result in the carrier’s
refusal to honor a damage claim. The form required to file
such a claim will be supplied by the carrier.
CONCEALED LOSS OR DAMAGE
Concealed loss or damage means loss or damage which
does not become apparent until the product has been
unpacked. The contents may be damaged in transit due
to rough handling even though the carton may not show
external damages. When the damage is discovered upon
unpacking, make a written request for inspection by the
carrier’s agent within fifteen (15) days of the delivery date
and file a claim with the carrier.
IM 1059-11 LARGE VERTICAL WSHP
The installer must determine and follow all applicable codes
and regulations. This equipment presents hazards of electricity,
rotating parts, sharp edges, heat and weight. Failure to read and
follow these instructions can result in property damage, severe
personal injury or death. This equipment must be installed by
experienced, trained personnel only.
1. To prevent damage, do not operate this equipment
for supplementary heating and cooling during the
construction period.
2. Inspect the carton for any specific tagging numbers
indicated by the factory per a request from the
installing contractor. At this time the voltage, phase
and capacity should be checked against the plans.
3. Check the unit size against the plans to verify that
the unit is being installed in the correct location.
4. Before installation, check the available ceiling height
versus the height of the unit.
5. Note the location and routing of water piping,
condensate drain piping, and electrical wiring. The
locations of these items are clearly marked on
submittal drawings.
6. The installing contractor will find it beneficial to
confer with piping, sheet metal, and electrical
foremen before installing any unit.
Note: Check the unit data plate for correct voltage with the
plans before installing the equipment. Also, make
sure all electrical ground connections are made in
accordance with local code.
7. The contractor shall cover the units to protect the
machines during finishing of the building. This is
critical while spraying fireproofing material on bar
joists, sandblasting, spray painting and plastering. If
plastic film is not available, the shipping carton may
be modified to cover the units during construction.
8. Remove all shipping blocks in the fan wheel.
4
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Installation Considerations
Unit location
Large Vertical Water Source Heat Pump units are easily
located in equipment rooms or floor-by-floor installations.
They can be applied to all building types where it is
advantageous to extend the water source heat pump
concept to larger or core areas.
Locate the unit in an area that allows for easy removal
of the filter and access panels, and has enough space
for service personnel to perform maintenance or repair.
Provide sufficient room to make water, electrical and
duct connections.
also a copper FPT type and is located on both sides of the
unit. The unused connection is plugged.
The main control panel is located in the center front of
the unit. The fan discharge is top front, and the fan motor
is always located at the piping end. Unit sides opposite
the control panel and opposite the piping side may be up
against walls and still allow for service and maintenance
through the remaining access panels.
Figure 2: Fan deck arrangements
Figure 1: Service clearances
Fan
Motor
Rear (or Top)
Discharge
Right-Hand Piping
(Upblast-Rear)
Front (or Top)
Discharge
Right-Hand Piping
(Upblast-Front)
Front (or Top)
Discharge
Left-Hand Piping
(Upblast-Front)
Notes 1. A 12" (305 mm) minimum clearance is required on the side opposite the pipe connection side to gain access to panel to remove
locking collar for shaft removal.
2. Top clearance is required for fan shaft removal.
The contractor should make sure that access has been
provided including clearance for 2" (51 mm) thick filter
brackets, duct collars and fittings at water and electrical
connections. Allow adequate room around the unit
for a condensate trap. The unit can be installed “free
standing” in an equipment room. Generally, the unit is
located in a separate room with the non-ducted return air
facing the return air intake.
Alternatively, the unit can have a ducted return air. It is
recommended that the unit be located on vibration isolators
to reduce any vibration (see Figure 3 on page 6).
Fan deck arrangements
Six fan discharge arrangements and two piping
arrangements are available. With the return air side
defined as the “front” of the unit, the water piping
connections may be right-hand (side) or left-hand. All units
have a single supply and return water connection with
a copper FPT type fitting that protrudes through the unit
casing for easy connection. The condensate connection is
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Rear (or Top)
Discharge
Left-Hand Piping
(Upblast & Rear)
Straight Horizontal
Discharge Left-Hand
Piping (Top-Horizontal
Discharge)
Straight Horizontal
Discharge Right-Hand
Piping (Top-Horizontal
Discharge)
Notes: 1. The hand of unit is determined by looking
at the return air (filter) side. The piping and
electrical connections are always made on
the “hand” side of the unit. The return air (filter) side is considered the “front” of the unit.
2. The fan motor is always located at the piping/
electrical connection (hand) side of the unit.
LARGE VERTICAL WSHP IM 1059-11
Installation Considerations
Vibration isolators
Figure 3: Vibration isolator dimensions
For minimum sound and vibration transmission, it is
recommended that the unit be mounted on vibration
isolators.
Holes are provided in the bottom panel to facilitate
connection of isolators (see Figure 4 & 5 for hole locations).
Isolators supplied by the manufacturer are the type
shown in Figure 3. Four white isolators are used for single
compressor units and six green isolators are used for
dual compressor units. The holes in the bottom of the unit
allow for a 3⁄8" (10 mm) bolt to be secured to the isolator.
3/8" (10 mm) TAP
2⅝" (61 mm)
2½" (64 mm)
7/16" (11 mm)
4½" (114 mm)
5½" (140 mm)
Figure 4: Vibration isolators locations - single compressor unit
3"
(76 mm)
A
A
7/16"
(11 mm)
(4) 7/16" (11 mm) holes
285/32"
(715 mm)
2"
(51 mm)
Section A-A
3" (76 mm)
3" (76 mm)
1/4"
(6 mm)
3" (76 mm)
5423/32"
(1390 mm)
Figure 5: Vibration isolators locations - dual compressor unit
2"
(51 mm)
(6) 3/8" (19 mm) holes
301/8"
(765 mm)
2" (51 mm)
403/16"
(1021 mm)
31/4" (83 mm)
31/4" (83 mm)
803/8"
(2042 mm)
IM 1059-11 LARGE VERTICAL WSHP
6
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Installation Considerations
Air balancing
Unit sizes 072 thru 290 are supplied with a variable pitch
motor sheave to aid in airflow adjustment.
When the final adjustments are complete, the current draw
of the motors should be checked and compared to the full
load current rating of the motors. The amperage must not
exceed the service factor stamped on the motor nameplate.
Sheave Adjustment
3. Open each movable flange until its notch is adjacent to
the notch on the center flange. Be certain that neither
movable flange is opened more than one full turn.
4. Open each movable flange the same number of full or
half turns until the desired number of turns is obtained.
Do not open more than five full turns.
CAUTION
Failure to adjust both equally may cause excessive vibration and
blower assembly failure.
Adjusting Single Groove Sheave
1. All sheaves should be mounted on the motor or
driving shaft with the setscrew “X” toward the motor
5. Replace key “E” and tighten setscrews “Y”. Wrench
torque 110 in.-lb. minimum - 130 in.-lb. maximum.
2. Fit shaft key “D” between sheave and shaft, and
lock setscrew “X” in place. Wrench torque 110 in.-lb.
minimum - 130 in.-lb. maximum.
6. Put on belts and adjust belt tension.(Do not force belts
over flanges).
3. Be sure both driving and driven sheaves are in
alignment and that shafts are parallel. Total axial
and parallel misalignment must not exceed 1/4°
7. Be sure that all keys are in place and that all setscrews
are torqued properly before starting drive. Check
setscrews and belt tension after 24 hours of operation.
4. Loosen setscrew “Y” in moving flange of sheave until
movable flange is free to rotate.
Figure 7: Sheave adjustment detail - two groove
.
OD notched here
Y
5. Adjust sheave pitch diameter for desired speed by
opening rotating parts by half or full turn increments from
closed position. Do not open more than five full turns.
Y
E
6. Tighten setscrew "Y" to 110 in.-lb. to 130 in.-lb. with
setscrew "Y" located over center of casts flats on
barrel of sheaves fixed component.
D
7. Put on belts and adjust tension. (Do not force belts
over grooves.) Check setscrews and belt tension after
24 hours of operation.
Key “E” projects to
provide a grip for
removing
X
Figure 6: Sheave adjustment detail - single groove
Y
Figure 8: Drive belt adjustment
X
Span Le
ngth (t)
Deflecti
on
Force
D
D
h
d
Adjusting 2-Groove Sheaves
1. All sheaves should be mounted on the motor or
driving shaft with the setscrew “X” toward the motor
C
1. Loosen setscrews “Y” in moving flanges and pull out
key “E”. (This key projects a small amount to provide a
grip for removing).
2. Rotate both movable flanges inward until they touch
the center flange.
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7
h=
t=
t
64
C2 -
( )
D-d
2
Where: t = Span length, inches (mm)
C = Center distance, inches (mm)
d = Smaller sheave diameter, inches (mm)
h = Deflection height, inches (mm)
Note: The ratio of deflection to belt span is 1:64.
LARGE VERTICAL WSHP IM 1059-11
Installation Considerations
Ductwork and attenuation
Ventilation air
Discharge ductwork is normally used with these
conditioners. Return air ductwork may also be required
but will require field installation of a return air duct collar.
All ductwork should conform to industry standards of
good practice as described in ASHRAE Systems Guide.
The discharge duct system will normally consist of a flexible
connector, a transition piece to the final duct size, a short
run of duct, an elbow without vanes and a trunk duct tee’d
into branch ducts with discharge diffusers. Transformation
duct must not have angles totalling more than 30 degrees
or severe loss of air performance can result.
All units have multiple fan outlets. The preferred method
for minimum static pressure loss would be individual
ducts at each outlet connected to a larger main duct
downstream (Figure 9).
For minimum noise transmission, the metal duct material
should be internally lined with acoustic fibrous insulation.
The ductwork should be laid out so that there is no line
of sight between the conditioner discharge and the
distribution diffusers.
Return air ducts can be brought in adjacent to the return
air of the conditioner. Typically, the equipment room
becomes the common return air plenum.
Do not insert sheet metal screws directly into the unit
cabinet for connection of supply or return air ductwork,
especially return air ductwork which can hit the drain pan
or the air coil.
Outside air may be required for ventilation. The
temperature of the ventilation air must be controlled so
that mixture of outside air and return air entering the
conditioner does not exceed conditioner application limits.
It is also general practice to close off the ventilation air
system during unoccupied periods (night setback).
The ventilation air system is generally a separate
building subsystem with distribution ductwork. Simple
introduction of the outside air into each return air plenum
chamber reasonably close to the conditioner air inlet
is not only adequate, but recommended. Do not duct
outside air directly to the conditioner inlet. Provide
sufficient distance for thorough mixing of outside and
return air.
Notes: 1. Transformations to supply duct have maximum slope of 1" to 7".
2. Square elbows with double thickness vanes
may be substituted.
3. Do not install ducts so that the air flow is
counter to fan rotation. If necessary, turn fan
deck assembly and motor.
4. Transformations and units shall be adequately supported so no weight is on the flexible
connection.
Figure 9: Suggested supply ducting per ASHRAE and SMACNA publications
Flexible
Connector
Note 2
Note 1
Note 2
Note 1
Note 1
Note 2
Flexible
Connector
Fan Rotation
(See Note 3)
Flexible
Connector
Fan Rotation
(See Note 3)
Fan Rotation
(See Note 3)
Transformation Duct
Flexible Connector
Note 2
Main Duct
Branch Duct
Fan Rotation
(See Note 3)
Distribution
Diffuser
Trunk Duct
IM 1059-11 LARGE VERTICAL WSHP
8
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Installation Considerations
Accessory 2" deep filter rack kit
with return air duct flange
4. On single compressor units, attach two flanges
using four (4) #8 truss head screws provided.
5. Attach center support in original location.
The (field- installed) accessory 2" filter rack with duct
flange allows for connection of return air ducting to the
unit. Unit sizes 072 through 120 require four filters, and
six filters for unit sizes 180 through 290.
The kits are installed as follows:
1. Remove all filters, filter racks and brackets. Save all
screws. Discard bracket end.
6. Locate and attach center filter racks using screw
provided.
7. Attach duct collar sides using eight (8) #10 sheet metal
8. No point in the drain system may be above the drain
connection of any unit.
2. Attach top duct collar in conjunction with top filter
rack with truss head screws.
9. Automatic flow controlled devices must not be
installed prior to system cleaning and flushing.
3. Attach bottom duct collar and filter rack.
10. A high point of the piping system must be vented.
11. Check local code for the need of dielectric fittings.
Figure 10: Field-installed accessory 2" deep filter rack kit with return air duct flange – sizes 072-120
Top Duct Collar
Center Support
Top Filter Rack
Chassis
Side Flanges
Center Filter Racks
Door End
Duct Collar Side
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LARGE VERTICAL WSHP IM 1059-11
Installation Considerations
Figure 11: Field-installed accessory 2" deep filter rack kit with return air duct flange – sizes 180-290
Top Duct Collar
Center Supports
Top Filter Rack
Chassis
Center Filter Racks
Duct Collar
Center Support
Door End
Duct Collar Side
IM 1059-11 LARGE VERTICAL WSHP
10www.DaikinApplied.com
Unit Installation
Piping
1. All units should be connected to supply and return
piping in a two-pipe reverse return configuration. A
reverse return system is inherently self-balancing
and requires only trim balancing where multiple
quantities of units with different flow and pressure
drop characteristics exist in the same loop. Check
for proper water balance by measuring differential
temperature reading across the water connections.
To insure proper water flow, the differential flow
should be 10°F to 14°F (5°C to 8°C) for units in
cooling mode. A direct return system may also work
acceptably, but proper water flow balancing is more
difficult to achieve and maintain.
2. The piping can be steel or copper.
WARNING
Polyolester Oil, commonly known as POE oil is a synthetic oil
used in many refrigeration systems. POE oil, if ever in contact
with PVC/CPVC will coat the inside wall of PVC/CPVC pipe
causing environmental stress fractures. It is recommended
that PVC/CPVC piping is not used in the installation of the loop
system, as system failure and property damage could result.
3. Supply and return run-outs usually join the unit via
short lengths of high pressure flexible hose which
are sound attenuators for both unit operating noise
and hydraulic pumping noise. One end of the hose
should have a swivel fitting to facilitate removal for
service. Hard piping can also be brought directly to
the unit. This option is not recommended since no
vibration or noise attenuation can be accomplished.
The hard piping must have unions to facilitate unit
removal. See Figure 12 for typical piping setup.
4. Some flexible hose threaded fittings are supplied
with sealant compound. If not, apply Teflon tape to
assure a tight seal.
5. Supply and return shutoff valves are required
at each conditioner. The return valve is used for
balancing and should have a “memory stop” so that
it can always be closed off but can only be reopened
to the proper position for the flow required.
6. No unit should be connected to the supply and return
piping until the water system has been cleaned and
flushed completely. After the cleaning and flushing has
taken place, the initial connection should have all valves
wide open in preparation for water system flushing.
7. Condensate piping can be steel, copper or PVC.
Each unit includes a condensate connection.
Figure 12: Typical piping
Balancing Valve
with Close-off
Water
Return
Water
Supply
Shutoff Valve
Flexible Hoses
IM 1059-11 LARGE VERTICAL WSHP
Condensate Drain with
Trap and Clean-out
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Unit Installation
Condensate Drain Connection
A field provided condensate trap must be installed on
each water source heat pump. Condensate removal
piping must be pitched away from the unit not less than
1/4" per foot. The vent should extend at least 1-1/4"
above the unit condensate fitting. A vent is required after
the trap so that the condensate will drain away from
the unit. The vent can also act as a clean out if the trap
becomes clogged. To avoid having waste gases entering
the building, the condensate drain should not be directly
piped to a drain/waste/vent stack. See local codes for
the correct application of condensate piping to drains
Figure 13: Unit condensate drain pipe trap detail
1-1⁄2" (38mm)
Optional
Field- Installed Vent
1. Each water source heat pump is provided with
a 3/4" FPT flush mount fitting for connection of
a condensate drain. A complete copper or PVC
condensate system can be used. Copper or steel
condensate piping should be insulated to prevent
sweating. In most applications the use of PVC
prevents sweating of condensate drain.
2. Do not locate any point in the drain system above
the condensate drain connection of any unit.
It may be necessary to manually fill the trap at system
startup, or to run the unit for sufficient time to build a
condensate seal. The condensate trap and condensate
piping drainage should be free of any foreign debris.
Debris can prevent proper drainage and unit operation
and result in condensate buildup.
3. Do not locate any point in the drain system above
the drain connection of any unit.
4. Automatic flow controlled devices must not be
installed prior to system cleaning and flushing.
1-1⁄2"
(38mm)
1⁄4" Per Foot
(21mm Per Meter)
5. A high point of the piping system must be vented.
6. Check local code for the need for dielectric fittings.
Note: Improper trapping can lead to several problems. If
the trap is too tall, negative pressure will prevent
drainage, causing condensate backup. If the trap is
too short the seal will be destroyed or nonexistent,
producing the same effect as a non-trapped system.
Figure 14: WSE condensate drain pipe detail
Vent
www.DaikinApplied.com12
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
Typical Piping With Optional Waterside Economizer
WSE piping location dimensions – sizes 072-120
L
F
G
M
J
Cr
Vent access
1" FPT Return
water
connection
Br
K
Cs
Motorized valve
access panel
As
E
D
(to center of drain)
H
1" FPT Supply
water
connection
WSE condensate drain
connection 7/8" O.D.
Left-hand unit
Right-hand unit
Note:
Piping connections from WSE return to unit supply to be field installed
WSE piping location dimensions – sizes 180-290
L
F
G
M
J
Vent access
Cr
K
1-1/2" FPT
Return water
connection
Br
Cs
Motorized valve
access panel
As
H
E
D
(to center of drain)
WSE condensate drain
connection 7/8" O.D.
Left-hand unit
Note:
Right-hand unit
Piping connections from WSE return to unit supply to be field installed
Condensate
Drain 7/8" O.D.
Supply & Return Connections
Unit Size
072 – 1201
180 – 2902
1-1/2" FPT
Supply water
connection
As
Br
Cs
Cr
D
E
Left &
right-hand
28.80
18.27
30.00
30.00
24.00
4.50
Left-hand
31.53
20.66
39.92
39.75
Right-hand
32.13
20.39
39.92
41.16
26.18
4.50
M (filter rack)
F
G
H
J
K
L
9.00
54.90
23.15
3.80
55.75
28.00
16.00
80.63
25.33
5.10
67.25
30.00
Standard
Optional
1.13"
2.13"
or
4.13"
Notes: 1 Supply and return piping connections = 1-1/4" FPT.
2 Supply and return piping connections = 1-1/2" FPT.
IM 1059-11 LARGE VERTICAL WSHP
13www.DaikinApplied.com
Unit Installation
Factory installed filter rack without duct flange (options) for large vertical units
▪
▪
▪
▪
▪
Standard 1" disposable filter
Merv 8 in 2" frame
Merv 13 in 4" frame
No filter with 2" filter rack (low leak)
No filter-no filter rack
Field installed filter rack with return air duct flange (accessory) for large vertical units
▪ 2" filter rack with return air duct flange
C D
B
A
Accessory 2" deep filter rack
with return air duct flange
Table 1: Accessory filter rack with return air duct flange dimensions
Unit Size
A
B
072-120
50.10"
30.90"
C
2" deep
74.10"
Filters (quantity)
4
2.29"
180-290
D
38.90"
1"
6
Note:Dimensions are to outside edge of filter rack flange.
www.DaikinApplied.com14
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
Typical WSE field provided and installed jumper piping routing details –
LVC/LVW– sizes 072-120, right-hand
Top View
WSE Return
Unit
Return
WSE Supply
Unit Supply
Front View
1.7" Min. dim.
3.7" Max. dim.
Right End View
IM 1059-11 LARGE VERTICAL WSHP
15www.DaikinApplied.com
Unit Installation
LVC/LVW – sizes 072-120, left-hand
11"
Max. dim.
7" Min. dim.
Top View
WSE Return
WSE Supply
Unit Supply
Left End View
www.DaikinApplied.com16
Front View
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
Typical WSE field provided and installed jumper piping routing details –
LVC/LVW– sizes 180-290, right-hand
Top View
WSE Return
WSE Supply
Unit Supply
Unit Return
Front View
15" Min. dim.
19.85" Max. dim.
Right End View
www.DaikinApplied.com17
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
LVC/LVW – sizes 180-290, left-hand
Top View
17" Min. dim.
WSE Return
WSE Supply
Unit
Supply
Unit Return
10" Max. dim.
Front View
Left End View
www.DaikinApplied.com18
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
Water System Quality
The cleaning, flushing and chemical treatment of a water
source heat pump system is fundamental to efficient operation
and the life expectancy of the system.
Potential system problems produced by the use of water fall
into three general categories:
• Scale formation – Mineral deposits which result from the
crystallization and precipitation of dissolved salts in the
water. The deposits form an insulating barrier, reducing the
heat transfer rate and impeding the circulation of fluids due
to increased pressure drop.
• Corrosion – Decomposition of the metal caused by
absorption of gases from the air. Corrosion may occur in
any metal component of the system.
• Organic growths – Slime and algae which form under
certain environmental conditions, and can reduce the
heat transfer rate by forming an insulating coating or can
promote corrosion by pitting.
The system water should be evaluated for degrees of impurity,
with testing available from independent testing labs, health
departments or state agencies.
Table 2 is a list of water characteristics, the potential impurities
and their results and the recommended treatment.
Avoiding Potential Problems
As shown in Table 2, all water contains some degree of impurities which may affect the performance of a heat pump system.
The use of a cupro-nickel coil can help avoid potential problems. Water flow rates should:
• Be high enough that the temperature rise through the heat
exchanger does not exceed 10° F when operating in the
cooling mode.
• Not exceed 4 GPM per nominal ton. Flow rates that have
velocities of 10 feet per second or more may cause pipe
erosion and heat exchanger failure.
Table 2: Water quality conditions & applications
Potential Problem
Chemical(s) or Condition
Range for Copper Heat Exchangers
Range of Cupronickel Heat Exchanger
Scaling
Calcium & Magnesium Carbonate
Less than 350 ppm
Less than 350 ppm
pH Range
7–9
5–9
Total Dissolved Solids
Less than 1000 ppm
Less than 1500 ppm
Less than 0.5 ppm
Corrosion
Biological Growth
Erosion
Ammonia, Ammonium Hydroxide
Less than 0.5 ppm
Ammonium Chloride, Ammonium Nitrate
Less than 0.5 ppm
Less than 0.5 ppm
Calcium Chloride/ Sodium Chloride
Less than 125 ppm
Less than 125 ppm - Note 4
Chlorine
Less than 0.5 ppm
Less than 0.5 ppm
Hydrogen Sulfide
None Allowed
None Allowed
Iron Bacteria
None Allowed
None Allowed
Iron Oxide
Less than 1 ppm
Less than 1 ppm
Suspended Solids
Less than 10 ppm
Less than 10 ppm
Water Velocity
Less than 8 ft./s
Less than 12 ft./s
Notes: 1.Water hardness in ppm is equivalent to hardness in mg/L.
2.Grains/gallon = ppm divided by 17.1.
3.Copper and cupronickel heat exchangers are not recommended for pool applications for water outside the range
of the table. Secondary heat exchangers are required for applications not meeting the requirements shown above.
4.Salt water applications (approx. 25,000 ppm) require secondary heat exchangers due to copper piping between the heat exchanger and the unit fittings.
IM 1059-11 LARGE VERTICAL WSHP
19www.DaikinApplied.com
Unit Installation
Cleaning & flushing system
1. Prior to first operation of any conditioner, the water
circulating system must be cleaned and flushed of
all construction dirt and debris.
If the conditioners are equipped with water shutoff
valves, either electric or pressure operated, the supply
and return run-outs must be connected together
at each conditioner location. This will prevent the
introduction of dirt into the unit (Figure 15).
Figure 15: Supply & return run-outs connected together
Return Run-out
Supply Run-out
Mains
Flexible
Hose
Run-outs Initially
Connected Together
2. Fill the system at the city water makeup connection
with all air vents open. After filling, close all air
vents. The contractor should start main circulator
with the pressure reducing valve open. Check vents
in sequence to bleed off any trapped air, ensuring
circulation through all components of the system.
Power to the heat rejector unit should be off, and the
supplementary heat control set at 80°F (27°C).While
circulating water, the contractor should check and
repair any leaks in the piping. Drains at the lowest
point(s) in the system should be opened for initial
flush and blowdown, making sure city water fill valves
are set to make up water at the same rate. Check
the pressure gauge at pump suction and manually
adjust the makeup to hold the same positive steady
pressure both before and after opening the drain
valves. Flush should continue for at least two hours,
or longer if required, to see clear, clean drain water.
3. Shut off supplemental heater and circulator pump
and open all drains and vents to completely drain
down the system. Short circuited supply and return
run-outs should now be connected to the conditioner
supply and return connections. Do not use sealers
at the swivel flare connections of hoses.
5. Refill the system with clean water. Test the water
using litmus paper for acidity, and treat as required
to leave the water slightly alkaline (pH 7.5 to 8.5).
The specified percentage of antifreeze may also be
added at this time. Use commercial grade antifreeze
designed for HVAC systems only. Do not use
automotive grade antifreeze.
Once the system has been filled with clean water
and antifreeze (if used), precautions should be taken
to protect the system from dirty water conditions.
Dirty water will result in system wide degradation of
performance and solids may clog valves, strainers,
flow regulators, etc. Additionally, the heat exchanger
may become clogged which reduces compressor
service life or causes premature failure.
6. Set the loop water controller heat add setpoint
to 70°F (21°C) and the heat rejection setpoint to
85°F (29°C). Supply power to all motors and start
the circulating pumps. After full flow has been
established through all components including the
heat rejector (regardless of season) and air vented
and loop temperatures stabilized, each of the
conditioners will be ready for check, test and startup, air balancing, and water balancing.
Operating limits
Information for initial start-up only
Standard range units:
Units are designed to start in an ambient of 50ºF (10ºC),
with entering air at 50ºF (10ºC), with entering water at
70ºF (21ºC), with both air and water at the flow rates used
in the ISO 13256-1 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.
Extended range units:
Extended range heat pump conditioners are designed
to start in an ambient of 40ºF (5ºC), with entering air at
40ºF (5ºC), with entering water at 40ºF (5ºC), with both
air and water at the flow rates used in the ISO 13256-1
rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.
4. Trisodium phosphate was formerly recommended
as a cleaning agent during flushing. However,
many states and localities ban the introduction of
phosphates into their sewage systems. The current
recommendation is to simply flush longer with warm
80°F (27°C) water.
IM 1059-11 LARGE VERTICAL WSHP
20www.DaikinApplied.com
Unit Installation
Table 3: Water source heat pump operating temperature limits (for continuous duty)
Entering Air °F
Operating Mode
Minimum
Entering Water °F
Standard Range
Maximum
Extended Range
DB
WB
DB
WB
Minimum
Maximum
Minimum
Maximum
Cooling
65
55
85
71
55
110
50
110
Ambient
50
–
100
–
–
–
–
–
Heating
50
–
80
–
55
90
20
90
Ambient
50
–
85
–
–
–
–
–
Notes:1. In the heating mode, the sum of the entering air + entering water must be ≥ 100°F.
2. MINIMUM WATER FLOW = 1.5 GPM/Ton.
3. Maximum and minimum values may not be combined. If one value is at maximum or minimum, the other two conditions may not exceed the normal condition for standard units. Extended range units may combine any two maximum conditions, but not more than two, with all other conditions being normal conditions.
Table 4: Water source heat pump operating temperature limits at start-up (not for continuous duty)
Entering Air °F
Operating Mode
Minimum
Entering Water °F
Standard Range
Maximum
Extended Range
DB
WB
DB
WB
Minimum
Maximum
Minimum
Maximum
Cooling
50
40
105
87
45
120
30
120
Ambient
45
–
110
–
–
–
–
–
Heating
40
–
85
–
40
95
20
100
Ambient
40
–
85
–
–
–
–
–
Environment
This equipment is designed for indoor installation
only. Sheltered locations such as attics, garages, etc.,
generally will not provide sufficient protection against
extremes in temperature and/or humidity, and equipment
performance, reliability, and service life may be
adversely affected.
Power supply
A voltage variation of +/-10% of nameplate voltage is
acceptable. Three-phase system imbalance shall not
exceed 2%.
Electrical data
General
1. Verify the compatibility between the voltage and
phase of the available power and that shown on the
unit serial plate. Line and low voltage wiring must
comply with local codes or the National Electrical
Code, whichever applies.
3. Three phase 50 cycle units require a neutral wire for
230/50-1 power to the fan circuit.
4. Connect the thermostat/subbase wiring with the
power “off ” to the unit.
5. Field supplied relays installed on the input terminals
W1, W2, Y1, Y2 or G may introduce electrical noise.
Never install relay coils in series with the inputs.
Operating voltages
208/230-60-1................197 volts min.; 253 volts max.
265-60-1.......................238 volts min.; 292 volts max.
230-50-1.......................197 volts min.; 253 volts max.
460-60-3.......................414 volts min.; 506 volts max.
575-60-3.......................515 volts min.; 632 volts max.
Note: Voltages listed are to show voltage range. However,
units operating with over-voltage and under-voltage
for extended periods of time will experience premature
component failure. Three phase system unbalance
should not exceed 2%.
2. Apply correct line voltage to the unit. A 7⁄8" (22mm)
hole and/or a 1-1⁄8" (29 mm) knockout is supplied
on the side of the unit. A disconnect switch near the
unit is required by code. Power to the unit must be
sized correctly and have dual element (Class RK5)
fuses or an HACR circuit breaker for branch circuit
over-current protection. See the nameplate for
correct ratings.
www.DaikinApplied.com21
LARGE VERTICAL WSHP IM 1059-11
Unit Installation
Additional information for initial start-up
standard range units LVC
Extended range LVW units
Units are designed to start-up in an ambient of 50°F (10°C),
with entering air at 50°F (10°C), with entering water at 70°F
(21°C), with both air and water flow rates used in the ISO
13256-1 rating test, for initial start-up in winter.
Extended range heat pump units are designed to startup in an ambient of 50°F (10°C), with entering air at 40°F
(10°C), with entering water at 25°F (-4°C), with both air
and water at flow rates used in the ISO 13256-1 rating
test, for initial start-up in winter.
Note: This is not a normal or continuous operating condition.
It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy
temperature.
Note: This is not a normal or continuous operating condition.
It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy
temperature.
Antifreeze correction factors
Table 5: Ethylene glycol
10%
20%
30%
40%
50%
Cooling Capacity
0.9950
0.9920
0.9870
0.9830
0.9790
Heating Capacity
0.9910
0.9820
0.9770
0.9690
0.9610
Pressure Drop
1.0700
1.1300
1.1800
1.2600
1.2800
Table 6: Propylene glycol
10%
20%
30%
40%
50%
Cooling Capacity
0.9900
0.9800
0.9700
0.9600
0.9500
Heating Capacity
0.9870
0.9750
0.9620
0.9420
0.9300
Pressure Drop
1.0700
1.1500
1.2500
1.3700
1.4200
10%
20%
30%
40%
50%
Cooling Capacity
0.9980
0.9720
–
–
–
Heating Capacity
0.9950
0.9700
–
–
–
Pressure Drop
1.0230
1.0570
–
–
–
Table 7: Methanol
Table 8: Ethanol
10%
20%
30%
40%
50%
Cooling Capacity
0.9910
0.9510
–
–
–
Heating Capacity
0.9950
0.9600
–
–
–
Pressure Drop
1.0350
0.9600
–
–
–
IM 1059-11 LARGE VERTICAL WSHP
22www.DaikinApplied.com
Start-Up
Start-up
1. Open all valves to full open position and turn on
power to the conditioner.
2. Jumpers must be configured prior to connecting
supply power. See Table 9 and Table 10 on page
24.
Note: The settings of the hardware configuration jumpers are read when the controller is powered. Any changes to
the jumper settings require cycling power to the controller or sending a controller a reboot command through
the network communications.
Table 9: MicroTech III controller configuration jumper settings
Baseboard Description
Jumper(s)
Normal / Test Mode
JP1
Fan Operation
JP2
Loop Fluid
JP3
(see warning)
Freeze Fault Protection
JP4
Room Sensor Setpoint
Potentiometer Range
JP5
Thermostat / Room Sensor
JP6
Jumper Setting
Function
Open
Normal Operation
Shorted
Service / Test Mode
Open
Continuous Fan Operation (On), when not operating in the unoccupied mode.
Shorted
Cycling Fan Operation (Auto)
Open
Water Loop Fluid - Water freeze protection (factory default setting)
Shorted
Glycol Loop Fluid - Systems with anti-freeze protection
Open
None
Shorted
Freeze fault protection enabled
Open
Short Range: -5 to +5 ºF (-2.78 to +2.78 ºC)
Shorted
Long Range: 55 to 95ºF (12.78 to 35ºC)
Open
Thermostat Control
Shorted
Room Sensor Control
JP7 Open
JP8 Open
Compressor Availability
JP7 & JP8
Both Compressors Available (default)
JP7 Shorted
JP8 Open
JP7 Open
JP8 Shorted
One Compressor Available
No Compressors Available
WARNING
Jumper JP3 is factory provided in the open position. Extended range units require freeze protection down to 15 degrees. Jumper JP3 must
be field configured.
Figure 16: Location of configuration jumpers on the MicroTech III unit controller
www.DaikinApplied.com23
LARGE VERTICAL WSHP IM 1059-11
Start-Up
Note: The settings of the hardware configuration jumpers are read when the controller is powered. Any changes to the jumper settings
require cycling power to the controller or sending a controller a reboot command through the network communications.
Table 10: I/O expansion module jumper settings
I/O Expansion Description
Jumper(s)
Not Used
JP1
JP1
Open
–
Not Used
JP2
JP2
Open
–
JP3
Open
JP4
Open
JP3
Shorted
JP4
Open
Secondary Heating
Options
Cooling / Dehumidification
Options
JP3 & JP4
JP5 & JP6
Not Used
JP7
Lead Compressor Option
JP8
Jumper Setting
JP3
Open
JP4
Shorted
JP5
Shorted
JP6
Open
None
Supplemental Electric Heat
Boilerless Electric Heat
Without Hydronic Cooling
JP5
Open
JP6
Shorted
JP7
Open
–
JP8
Open
Compressor #1 is Lead (factory default setting)
JP8
Shorted
Compressor #2 is Lead
Figure 17: I/O expansion module configuration jumper
terminals
Jumper Terminals
3. Set thermostat to “Cool”. If the thermostat is an
automatic changeover type, simply set the cooling
temperature to the coolest position. On manual
changeover types additionally, select “Cool” at the
system switch.
Again, many conditioners have time delays which
protect the compressor(s) against short cycling.
After a few minutes of operation, check the
discharge grilles for cool air delivery. Measure
the temperature difference between entering and
leaving water. It should be approximately 1½
times greater than the heating mode temperature
difference. For example, if the cooling temperature
difference is 15°F (8°C), the heating temperature
difference should have been 10°F (5°C).
Without automatic flow control valves, target a
cooling temperature difference of 10°F to 14°F (5°C
IM 1059-11 LARGE VERTICAL WSHP
Model
Hydronic Cooling (Waterside Economizer)
to 8°C). Adjust the combination shutoff/balancing
valve in the return line to a water flow rate which will
result in the 10˚F to 14°F (5°C to 8°C) difference.
4. Set thermostat to “Heat.” If the thermostat is the
automatic changeover type, set system switch to the
“Auto” position and depress the heat setting to the
warmest selection. Some conditioners have built-in time
delays which prevent the compressor from immediately
starting. With most control schemes, the fan will
start immediately. After a few minutes of compressor
operation, check for warm air delivery at discharge
grille. If this is a “cold building” start-up, leave unit
running until return air to the unit is at least 65°F (18°C).
Measure the temperature difference between
entering and leaving air and entering and leaving
water. With entering water of 60°F to 80°F (16°C to
27°C), leaving water should be 6°F to 12°F (3.3°C
to 6.6°C) cooler (under full load conditions) and the
air temperature rise through the machine should not
exceed 35°F (19°C). If the air temperature exceeds
35°F (19°C), then the water flow rate is inadequate.
5. Check the elevation and cleanliness of the
condensate line. If the air is too dry for sufficient
dehumidification, slowly pour enough water into the
condensate pan to ensure proper drainage.
6. If the conditioner does not operate, check the
following points:
a. Is supply voltage to the machine compatible?
b. Is thermostat type appropriate?
c. Is thermostat wiring correct?
24www.DaikinApplied.com
Start-Up
7. If the thermostat operates but stops after a brief period:
a. Is there proper airflow? Check for dirty filter,
incorrect fan rotation (3-phase fan motors only), or incorrect ductwork.
b. Is there proper water flow rate within temperature
limits? Check water balancing; back-flush unit if
dirt-clogged.
8. Check for vibrating refrigerant piping, fan wheels, etc.
9. Do not lubricate the fan motor during the first year of
operation as it is pre-lubricated at the factory.
10. Field supplied relays installed on the input terminals
W1, W2, Y1, Y2 or G may introduce electrical noise.
Never install relay coils in series with the inputs.
Control options
The control enclosure houses the major operating
electrical controls including the MicroTech III controller
and I/O expansion module, control transformer,
compressor relays and fan relay. Each component is
easily accessed for service or replacement.
Three unique control choices are offered with the
MicroTech III control system:
■ Standalone operation using a MicroTech III
controller and I/O expansion module
■
MicroTech III controller with I/O expansion module
and LonWorks® communication module
■
MicroTech III controller with I/O expansion module
and BACnet® communication module
Each option features direct quick-connect wiring to all
unit-controlled components for “clean” wiring inside the
control box. Each control circuit board receives power
from a 75 VA transformer.
Figure 18: Control options
Control
MicroTech III
Description
The MicroTech III controller is a
standalone microprocessor-based
control board conveniently located
in the unit control enclosure for easy
accessibility. The board is designed to
provide thermostat control of a Water
Source Heat Pump using a two-stage
wall thermostat. The unit controller
provides unit-wide control of the WSHP
and control of the first refrigerant circuit.
(Standalone) Unit
Controller with I/O The I/O Expansion Module is an
Expansion Module extension of the Microtech III controller
and provides control of the second
refrigerant circuit. External LED status
lights display fault conditions to provide
easy troubleshooting and diagnosis of
the second circuit.
LonWorks
Communication
Module
BACnet
Communication
Module
Application
Protocol
Each unit controller is factory
programmed, wired, and tested for
complete control of single zone,
standalone operation of your Daikin
Water Source Heat Pump.
Unit-mounted or wallmounted thermostat or room
sensor
Allows for:
Control of second refrigeration circuit,
secondary heating options and
cooling/dehumidification options.
The MicroTech III control system
accepts a plug-in LonWorks
commu­nication module to provide
network communications and added
functionality to easily integrate with
an existing BAS. The communication
module can be factory- or field-installed
and is tested with all logic required to
monitor and control the unit.
LonTalk application protocol is
designed for units that are integrated
into a LonWorks communication
network for centralized scheduling
and management of multiple heat
pumps.
LonMark 3.4 Certified
The MicroTech III controller accepts a
plug-in BACnet commu­nication module
to provide network communications
and added functionality to easily
integrate with an existing BAS. The
communication module can be factoryor field-installed and is tested with all
logic required to monitor and control
the unit.
Designed to be linked with a
centralized building automation
system (BAS) through a BACnet
communications network for
centralized scheduling and
management of multiple heat pumps.
BACnet
MS/TP
www.DaikinApplied.com25
LARGE VERTICAL WSHP IM 1059-11
Controls
MicroTech® III controller
DANGER
To avoid electrical shock, personal injury or death, be sure that
field wiring complies with local and national fire, safety, and
electrical codes, and voltage to the system is within the limits
shown in the job-specific drawings and unit electrical data plate(s).
Power supply to unit must be disconnected when
making field connections. To avoid electrical shock, personal
injury or death, be sure to rigorously adhere to field wiring
procedures regarding proper lockout and tagout of components.
General use and information
All Microtech III controller inputs must be operated by
dry contacts powered by the control board’s power
terminals. No solid state devices (Triacs) may be used
to operate the Microtech III controller inputs. No outside
power source may be used to operate the Microtech III
controller inputs.
The MicroTech III control system includes two
microprocessor-based control boards conveniently
located in the unit control box for easy access through a
removable access panel. The standalone controls are a
hard wired interface and provides all the necessary field
connections. The board can be wired for 24-volt AC output
to the wall thermostat by using terminals R & C. Two sets
of LED annunciators are located on the front of the unit
chassis to allow quick check of the unit operating status.
MicroTech III unit protections & LED
fault status annunciation
Assumes cycle fan operation-not continuous fan
operation:
■ Start-up – The unit will not operate until all the inputs
and safety controls are checked for normal conditions.
■ Cooling mode – On an initial call for stage 1 cooling,
the fan will energize, the pump request will energize,
and the 45 second flow timer will start. When the
compressor minimum off, and random startup timers
are expired, the lead compressor will start the stage
1 cooling settings. If room setpoint conditions are not
satisfied, the lag compressor will start, which is stage
2 cooling settings. When the room setpoint conditions
are satisfied, the lag compressor will shut off first
followed by the lead compressor when all cooling
requests are satisfied. If fan cycling is enabled, the fan
will turn off once room setpoint conditions are satisfied.
■ Waterside economizer – This mode requires the
optional factory-installed waterside economizer. A
hydronic economizer coil, 3-way water valve and
temperature sensor are added to the unit. The
purpose of this mode is to satisfy some or all of
the cooling demand by using the loop water, which
is often reduced to 50°F or less via the cooling
tower to achieve sufficient cooling performance.
IM 1059-11 LARGE VERTICAL WSHP
When a call for 1st stage cooling is engaged, with the
entering loop water below the economizer changeover
temperature, the H8 output on the MicroTech III board
is activated to open the motorized valve allowing water
flow to the equipment. The compressor is locked out,
the 3-way water valve opens to allow cool loop water to
flow through the economizer coil. The fan starts after 30
seconds (unless it is already on thru activation of the G
terminal by the thermostat fan switch “on”). On a further
demand for cooling, stage 2; the 1st compressor will
start in the cooling mode and the waterside economizer
will be disabled. On a further demand for cooling the
second compressor will energize. The waterside
economizer mode will not be activated if the entering
water temperature is below 35°F and an alarm (fault)
signal will be generated.
When the room setpoint conditions are satisfied, the
compressor will shut off, the 3-way valve will close and
the fan will either shut off (fan switch ”auto”) or continue
to run (fan switch “on”). The minimum off timer of 360
seconds starts. If the loop temperature increases above
the changeover temperature, waterside economizer
mode will be suspended and the unit will resume normal
mechanical cooling mode with stage 1 of the thermostat
now starting the compressor.
■ Dehumidification mode – Uses hot gas reheat with a
2-stage thermostat and humidistat for precise humidity
control.
■ Hot gas reheat with temperature control – If the
space temperature setpoint is satisfied, but the
space humidity is above the humidity setpoint, the
dehumidification mode is activated. The fan will
energize, the pump request will energize, the 45
second flow timer will start, the compressor minimum
off, and random startup timers expire, the hot gas
reheat valve opens sending hot gas to the reheat
coil, the lead compressor energizes, and after 180
seconds the lag compressor energizes. Return air
is cooled and reheated to near space temperature.
A call for cooling will close the hot gas reheat valve
and the unit will resume normal cooling operation.
If the space cooling and heating temperature
setpoints are satisfied, but the humidity falls below
the space humidity setpoint, the dehumidification
mode is suspended.
■ Heating mode – On an initial call for heating, the fan
will energize, the pump request will energize, the 45
second flow timer will start. After the flow, compressor
minimum off, and random startup timers are expired, the
lead compressor will start at stage 1 heating settings;
the reversing valve shall energize 5 seconds after the
lead compressor turns on. If room setpoint conditions
are not satisfied, the lag compressor will operate at
stage 2 heating settings. When the room setpoint
conditions are satisfied, the compressor will shut off. If
fan cycling is enabled, the fan will turn off, once room
setpoint conditions are satisfied.
26www.DaikinApplied.com
Controls
Supplemental electric heat control
The supplemental electric heating option provides
additional stages of heating that can be used in
conjunction with compressor heating, or exclusively if the
compressor is not available for heating.
General rules
• Supplemental electric heater and the compressor
may operate simultaneously.
• Minimum compressor ON and OFF timers do not
apply to electric heat control.
Operation
Fan main output: will turn ON when:
• Any auxiliary heat output is energized.
• For 30 fixed seconds after all auxiliary heat outputs
have been de-activated.
Electric heat outputs: are allowed to energize when
either condition exists:
• Inter-stage ON timer must be expired.
• Compressor is not available for heating.
When compressor is available
• Auxiliary heat stage #1 output energizes upon activation
of heating – stage #3.
• Auxiliary heat stage #2 output energizes upon activation
of heating – stage #4.
When compressor is unavailable
• Auxiliary heat stage #1 output energizes upon activation
of heating – stage #1.
• Auxiliary heat stage #2 output energizes upon activation
of heating – stage #3.
■ Boilerless heat control –Turns on the heater when the
entering water temperature is less than setpoint (default
is 55°F), the temperature set point is adjustable through
the network.
For geothermal applications the heater turns on when
the entering water temperature is less than setpoint
(default 28°F).
Note: In both cases the compressor is shut down.
■ Unoccupied mode – A simple “grounded” signal
between terminals U and C (no power source required),
puts the unit into the unoccupied mode for night setback
operation.
■ Inter-staging timer – A default value of 5 minutes
between staging of compressors, this feature minimizes
short cycling of compressors and improves comfort.
■ Override mode – A switch on the deluxe automatic
changeover thermostat can be activated during the
unoccupied mode to put the unit back into the occupied
mode for two hours for after-hours heating or cooling.
■ Motorized valve/pump restart – The IV/PR (H8)
terminals on the The MicroTech III unit controller are
used to energize (open) a motorized valve or start a
water pump to get water circulating prior to starting
the compressor on call for heating or cooling. Lead
compressor operation shall be delayed a minimum of 45
seconds, after the motorized valve/isolation valve output
energizes to allow for supply water flow.
■ Brownout protection – The MicroTech III unit
controller measures the input voltage and will suspend
compressor and fan operation if the voltage falls below
80% of the unit nameplate rated value. Two external
LED status are generated and an output is available to
a "fault" LED at the thermostat.
■ Emergency unit shutdown – A simple grounded
signal puts the unit into the shutdown mode. Remote
shutdown is provided so that when properly connected
to a water loop controller or remote switch, the
emergency shutdown input can be used to shut
down the water source heat pump. Compressor and
fan operations are suspended, and an a unique two
external LED status is generated.
■ Condensate overflow protection (cooling &
dehumidification modes only) – The MicroTech III
unit controller incorporates a liquid sensor at the top of
the drain pan. When the unit senses a high condensate
water level for 60 consecutive seconds while in the
cooling or dehumidification modes the unit enters
the "Off Alarm" machine state. The dehumidification
or cooling mode operation will immediately be deenergized as well as the pump output.
■ Short cycle protection & random start – After power
cycle or deactivation of certain alarms, or when leaving
the unoccupied mode, a new random compressor startdelay time between 300 and 360 seconds is generated.
The random start timer prevents compressors in
different units from starting simultaneously. Compressor
minimum OFF 360 sec) and compressor minimum ON
(180 sec) timers prevent compressor short cycling.
www.DaikinApplied.com27
LARGE VERTICAL WSHP IM 1059-11
Controls
■ Thermostat fault reset (preferred method) – A
feature to reset some lockouts like high pressure and/
or low temperature remote from the unit is available.
When the cause of the fault condition has been fixed,
repaired or resolved, the unit can be reset from the
thermostat. To reset the fault, move the system switch
on the thermostat from its current position (Heat/Auto/
Cool) to the Off position and back to its original position
two times within 30 seconds. The unit will now be reset.
The intelligent reset counter and the 24 hour timer are
cleared.
CAUTION
Some thermostats have internal timers greater than 30
seconds that delay their switching capabilities. Defeating
their internal timers may be required to reset the fault
using the thermostat.
Alternatively, thermostats shown in Figure 22 and
Figure 23 on page 38 have an optional “reset”
feature, by activating the reset feature and adding a
wire from terminal O to terminal TB1, pin 4, on the
MicroTech III board.
■ Reset of automatic lockouts (alternate method) - A
feature to reset some lockouts like high pressure and/
or low temperature at the unit is available. When the
cause of the fault condition has been fixed, repaired
or resolved, the unit can be reset at the unit. Apply a
grounded signal to the tenant override input (screw
terminal connection at TB1, pin 4) for a minimum of
10 seconds. The unit will now be reset. Alternatively,
dropping power to the unit from the disconnect switch
and re-applying power will reset the unit.
■ Selectable lead compressor – The lead compressor
selection provides a method to utilize circuit 2 if repairs
are required on circuit 1. This is not intended for normal
equipment operation. The jumper setting JP8 in the
I/O expansion board is used to configure the “Lead
Compressor” settings.
■ Lead compressor fail replacement – Upon detection
of a lead compressor fault and the lag compressor is
available, the selected lead compressor will be “failed
replaced” by the lag compressor. Lead compressor will
immediately be de-energized by ignoring the compressor
minimum ON timer. Lag compressor will energize
in place of the failed lead compressor, when the lag
compressor minimum OFF timer has expired. Reversing
valve for the lag compressor will be positioned, if
necessary, 5 seconds after the lag compressor starts up.
■ Equipment protection control – The MicroTech III
controller receives separate input signals from
the refrigerant high-pressure switch and the low
suction line temperature sensor. In a high-pressure
situation, compressor operation is suspended. In a
low temperature situation, the unit goes into a defrost
cycle where the unit is put into cooling operation for 60
seconds until the coaxial heat exchanger is free of ice.
Each switch generates its own unique LED status.
■ Intelligent alarm reset – The Intelligent Reset feature
helps to minimize nuisance trips of automatic lockouts
caused by low-temperature faults. This feature clears
faults the first two times they occur within a 24-hour
period and triggers an automatic lockout on the 3rd
fault. The fault remains active until the alarm is manually
cleared. At the end of the 24 hour period, all counts for
that specific intelligent reset alarm are cleared to zero
only if the occurrence counter is presently less than the
value of three. The 24-hour period and alarm counts are
stored in memory that is cleared when power is cycled.
IM 1059-11 LARGE VERTICAL WSHP
28www.DaikinApplied.com
Controls
MicroTech III unit controller and
I/O expansion module terminals,
locations and descriptions
Table 11: MicroTech III unit controller terminals locations
and descriptions
H1 – 1
24
24 VAC Power Input
H1 – 2
C
24 VAC common
H2 – 1
SL1
H2 – 2
Fan Main Output – Switched L1
Blank Terminal
Fan Main Output – Neutral
H7 – 4
Green LED Output
H7 – 5
Yellow LED Output
H7 – 6
H8 – 1
Red-Green-Yellow LED Common
1
Isolation Valve/Pump Request Relay N/O
H8 – 2
Isolation Valve/Pump Request Relay N/C
H8 – 3
24 VAC Common
H9 – 1
1
H9 – 2
Return Air Temp – Signal
Return Air Temp* – Common
TB1 – 1
1
Room Sensor – Status LED Output
TB1 – 2
2
Room Sensor – Fan Mode & Unit Mode Switches
TB1 – 3
3
Room Sensor – Setpoint Adjust Potentiometer
TB1 – 4
4
Room Sensor – Room Temp Sensor & Tenant
Override
H2 – 3
N
H3 – 1
HP1-1
Comp High Pressure Switch (HP1) Input Terminal 1
H3 – 2
HP1-2
Comp High Pressure Switch (HP1) Input Terminal 2
TB1 – 5
5
Room Sensor – DC Signal Common
H4 – 1
1
Discharge Air Temp Sensor – Common
TB2 – 1
R
24 VAC
H4 – 2
Discharge Air Temp Sensor – Signal
TB2 – 2
A
Alarm Output
H4 – 3
Leaving Water Temp Sensor – Common
TB2 – 3
W2
Thermostat – Heat Stage #2 (W2) Input
H4 – 4
Leaving Water Temp Sensor – Signal
TB2 – 4
W1
Thermostat – Heat Stage #1 (W1) Input
I/O Expansion Module Common (Gnd)
TB2 – 5
Y2
Thermostat – Cool Stage #2 (Y2) Input
H5 – 2
I/O Expansion Module Common (Gnd)
TB2 – 6
Y1
Thermostat – Cool Stage #1 (Y1) Input
H5 – 3
I/O Expansion Module +5 VDC
TB2 – 7
G
Thermostat – Fan Input
H5 – 4
I/O Expansion Module SPI CE1
TB2 – 8
O
Thermostat – Heat Stage #3 (W3) Input
H5 – 5
I/O Expansion Module SPI CLK
TB2 – 9
C
24 VAC Common
H5 – 6
I/O Expansion Module SPI OUT
TB3 – 1
E
Emergency Shutdown Input
H5 – 7
I/O Expansion Module SPI IN
TB3 – 2
U
Unoccupied Input
H5 – 8
I/O Expansion Module +12 VDC
L1 – 1
L1 - 1
H5 – 9
I/O Expansion Module 24 VAC
L1 – 2
L1 - 2
H5 – 10
I/O Expansion Module 24 VAC
L1 – 3
L1 - 3
H5 – 11
No Connection
N1
N1
H5 – 12
No Connection
N2
N2
Condensate Overflow Signal Input
N3
N3
H5 – 1
H6 – 1
1
1
24 VAC Power in
24 VAC Common
H6 – 2
Compressor Suction Temp Sensor (LT1) – Common
CN_LON1 – 1 CN_LON1 GND
H6 – 3
Compressor Suction Temp Sensor (LT1) – Signal
CN_LON1 – 2
+ 5 VDC
SPI CE (SPI Select To Communications Board)
H6 – 4
Compressor Low Pressure Switch (LP1) –
Source Voltage
CN_LON1 – 3
CN_LON1 – 4
SPI CLK (Master Clock)
CN_LON1 – 5
SPI OUT (MOSI)
CN_LON1 – 6
SPI IN (MISO)
CN_LON1 – 7
INT0 (SPI Ready To Baseboard)
CN_LON1 – 8
No Connection
H6 – 5
Compressor Low Pressure Switch (LP1) – Signal
H6 – 6
Reversing Valve – Common
H6 – 7
Reversing Valve – Output
H7 – 1
1
No Connection
H7 – 2
No Connection
H7 – 3
Red LED Output
www.DaikinApplied.com29
* Can have return air temperature sensor connected at H9 while the
room sensor is connected to TB1, pin 4 (room temp sensor and tenant override)
LARGE VERTICAL WSHP IM 1059-11
Controls
Note: A random start delay time between 300 and 360 seconds is generated at power up.
Figure 19: MicroTech III unit controller terminal locations
IM 1059-11 LARGE VERTICAL WSHP
30www.DaikinApplied.com
Controls
Table 12: I/O expansion module terminals locations and
descriptions
H1 – 1
H4 – 1
Fan Motor – Common
1
Entering Water Temp Sensor – Signal
I/O Expansion Board Common (Gnd)
H4 – 2
H1 – 2
I/O Expansion Board Common (Gnd)
H5 – 1
H1 – 3
I/O Expansion Board +5 VDC
H5 – 2
No Connection
H1 – 4
I/O Expansion Board SPI CE1
H5 – 3
Red LED Output
H1 – 5
I/O Expansion Board SPI CLK
H5 – 4
Green LED Output
H1 – 6
I/O Expansion Board SPI IN
H5 – 5
Yellow LED Output
H1 – 7
I/O Expansion Board SPI OUT
H5 – 6
I/O Expansion Board +12 VDC
H6 – 1
HP2-1
Comp #2 High Pressure Switch (HP2) Input Terminal 1
H1 – 9
I/O Expansion Board 24 VAC
H6 – 2
HP2-2
Comp #2 High Pressure Switch (HP2) Input Terminal 2
H1 – 10
I/O Expansion Board 24 VAC
H7 – 1
Comp #2 Suction Temp Sensor (LT2) – Signal
H1 – 11
No Connection
H7 – 2
Comp #2 Suction Temp Sensor (LT2) – Common
H1 – 12
No Connection
H7 – 3
Comp #2 Low Pressure Switch (LP2) – Signal
Auxiliary Heat / Hydronic Heat Output – N/O
H7 – 4
H2 – 2
No Connection
H8 – 1
H2 – 3
24 VAC Common
H8 – 2
24 VAC Common
Ext. 24 VAC In
H8 – 3
No Connection
H3 – 2
Ext. 24 VAC Common In
H8 – 4
Reversing Valve #2 Output – N/O
H3 – 3
HGR / Waterside Economizer Output – N/O
H8 – 5
H3 – 4
Ext. 24 VAC Common
TB1 – 1
1
Humidistat (Dehumidification / WSE) Signal Input
H3 – 5
Fan Motor – Signal
TB1 – 2
2
Comp #2 Low Pressure Switch (LP2) – Signal
H1 – 8
H2 – 1
H3 – 1
1
H3 – 6
1
1
1
Entering Water Temp Sensor – Common
1
No Connection
Red-Green-Yellow LED Common
Auxiliary 24VAC Output
1
Compressor #2 Output – N/O
24 VAC Common
Figure 20: I/O expansion module terminals locations
www.DaikinApplied.com31
LARGE VERTICAL WSHP IM 1059-11
Controls
MicroTech® III controller
with LonWorks® or BACnet®
communication module
Each Enfinity Large Horizontal Water Source Heat
Pump can be equipped with a LonWorks or BACnet
communication module. The LonWorks module is
LonMark 3.4 certified and designed to communicate
over a LonWorks communications network to a Building
Automation System (BAS). The BACnet module is
designed to communicate over a BACnet MS/TP
communications network to a building automation system.
Both communication modules are microprocessor-based
and can be factory or field-installed.
The communication modules are programmed and
tested with all the logic required to monitor and control
the unit. Optional wall sensors may be used with the
communication modules to provide limited local control of
the Horizontal Water Source Heat Pump. The MicroTech
III controller monitors water and air temperatures and
passes information to the communication module. The
module communicates with the BAS, to provide network
control of the Water Source Heat Pump.
MicroTech III LonWorks communication
module
The LonWorks communication module is designed
for units that are integrated into a LonWorks
communication network for centralized scheduling and
management of multiple heat pumps.
MicroTech III controller with
communication modules features
The MicroTech III Controller with LonWorks or BACnet
Communication Module orchestrates the following unit
operations:
■ Enable heating and cooling to maintain space
temperature setpoint based on a room sensor setting
■ Enable fan and compressor operation
■ Monitors all equipment protection controls
■ Monitors room and discharge air temperatures
■ Monitors leaving water temperature
■ Relays status of all vital unit functions
An on-board status LED indicates the status of the
MicroTech III LonWorks or BACnet module.
The MicroTech III unit controller with communication
module includes:
■ Return Air Temperature sensor (RAT) (field-installed)
■ Discharge Air Temperature sensor (DAT)
(field-installed)
■ Leaving Water Temperature sensor (LWT) (factory
installed)
CAUTION
When an optional wall-mounted room temperature sensor is
connected to the unit controller, the Return Air Temperature (RAT)
sensor must not be installed. A wall-mounted room temperature
sensor and the return air temperature sensor must not be
connected simultaneously or the unit will not operate properly.
The communication modules provide network access to
setpoints for operational control
Available wall sensors include:
■ Room sensor
MicroTech III BACnet communication
module
Designed to be linked with a centralized building
automation system (BAS) through a BACnet
communications network for centralized scheduling and
management of multiple heat pumps.
IM 1059-11 LARGE VERTICAL WSHP
■ Room sensor with LED status and tenant override
button
■ Temperature sensor with LED status, timed-override
button; ±5°F setpoint adjustment
■ Room sensor with LED status, timed-override button,
55° to 95°F setpoint adjustment
■ Room sensor with digital display, timed override button,
occupancy button; ±5°F setpoint adjustment or 55 to
95°F temperature setpoint and dehumidification control
32www.DaikinApplied.com
Typical Wiring Diagrams
MicroTech III controller with I/O expansion module with hot gas reheat (HGRH)
208/230, 460, 575-60-3 (1.5 hp or less)
FAN
MOTOR
GRN/YEL 97
YEL 8 (L2)
RED 9 (L3)
BLK7 (L1)
Note: Wiring diagrams are typical. For the latest
drawing version refer to the wiring diagram
located on the inside of the controls access
panel of the unit.
Gray tinted areas in the wiring diagram: Units
with factory installed communication module
include Discharge Air Temperature (DAT)
and Return Air Temperature (RAT) sensors
shipped loose and are field installed. The
Leaving Water Temperature (LWT) sensor is
factory installed.
Note: Switch L2/L3 fan
motor wires for
left-hand unit
R1
BLK 80
BLK 10
TB1
L1
L1
T1
L2
T2
L2
BLU
L3
L3
T3
RED 3
L1-1
L1-2
L1-3
N1
N2
N3
H2
H1
HG1
HG2
N
GND
CC1
YEL 83
YEL 88
BLU 21
TB3
E - EMER SHTDN INPUT
U - MARK IV - OCC/UNOCC
BLK
YEL
RED
H3
1 - ROOM SENSOR LED
CC1
CC2
CM1
CM2
COS
HP
HP2
IOEXP
LED1
LED2
*RAT
*LWT
LP
LP2
SLTS
SLTS2
R1
RV
RV2
TB1
X1
*DAT
EWT
R2
HG1
HG2
TB2
X2
L3
L2
R - 24VAC
BRN 54
BRN 55
TEST-1
5 - DC SIGNAL COM
L1
TB1
3 - SETPOINT ADJUST
4 - ROOM SENSOR/TO
Legend
ItemDescription
CM-1
MicroTech III Controller
2 - FAN MODE/HT-CL-AUTO
A - ALARM OUTPUT
W2 - HEAT - 2
Y1 - COOL - 1
Communication
Module
RUN PRG
G - FAN
O - W3 - HEAT -3
C - 24VAC COMMON
BLK 4
YEL 5
RED 6
BLK/RED - 460V
RED - 208v
ORG - 230V
BLK - 575V
BLK
YEL
RED
DAT
L1
L3
L2
BLU 28
YEL 27
LED1
BLK 80
BLK
CM-2
IOEXP
COS
SLTS
LP
BLU 41
CC2
T3
LED1
GRY 46
BLK 61
BLU 40
H4
H6
H5
H7
H8
JP_8
JP_7
JP_6
JP_5
JP_4
JP_3
JP_2
JP_1
1
RV
BLK 60
LWT
H9
RAT
24VAC COMMON
24V NC
HP
TB2
Y2 - COOL 2
JTAG
W1 - HEAT - 1
24V NO
SERVICE &
DISCONNECT
24V
COM
YEL 45
YEL 19
BLK 1
YEL 2
H
H
ORG 84
ORG 87
YEL 18
BLU 20
YEL 11
X1
5
2
YEL
R2
YEL 14
BLU 15
4
RED 12
BLK
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
JTAG
YEL 82
JP8
JP1
X2
SEE NOTE
IO Expansion Module
1
1
1
1
1
BLU
YEL
BLK 62
R2
AUX HEAT
1
3
TB2
YEL 89
LED2
WHT 85
24VAC COMMON
RED 86
RV2
HP2
EWT
BLK 63
LED2
BRN 53
BRN 52
SLTS2
BLU 42
BLU 43
LP2
HUMIDISTAT SIGNAL
Notes:1.“Run/Prg” Jumper to be in “Run” position for normal operation
BLK 81
www.DaikinApplied.com33
Circuit 1 Compressor Contactor
Circuit 2 Compressor Contactor
Circuit 1 Compressor
Circuit 2 Compressor
Condensate Overflow Sensor
Circuit 1 High Pressure Switch
Circuit 2 High Pressure Switch
I/O Expansion Board / Harness
LED Annunciator / Harness
LED Annunciator / Harness
Return Air Temp Sensor
Leaving Water Temp Sensor
Circuit 1 Low Pressure Switch
Circuit 2 Low Pressure Switch
Circuit 1 Suction Line Temp Sensor
Circuit 2 Suction Line Temp Sensor
Fan Motor Starter
Circuit 1 Reversing Valve Solenoid
Circuit 2 Reversing Valve Solenoid
Power Terminal Block
75 VA Transformer
Discharge Air Temp Sensor
Entering Water Temp Sensor
Relay HGRH
HGRH Solenoid 1
HGRH Solenoid 2
Terminal Block
Transformer 24VAC Output
____
* Leaving Water (LWT), Discharge Air (DAT) and Return Air Temperature (RAT) sensors are field installed.
Denotes optional feature
LARGE VERTICAL WSHP IM 1059-11
Typical Wiring Diagrams
MicroTech III controller with I/O expansion module with hot gas reheat (HGRH)
208/230, 460, 575-60-3 (greater than 1.5 hp)
FAN
MOTOR
GRN/YEL 97
BLK 7 (L1)
RED 9 (L3)
YEL 8 (L2)
Note: Switch L2/L3 fan
motor wires for
left-hand unit
T1
T3
T2
R1
RED
OL
L1
L3
L2
Note: Wiring diagrams are typical. For the
latest drawing version refer to the wiring diagram located on the inside of the
controls access panel of the unit.
Gray tinted areas in the wiring diagram:
Units with factory installed communication module include Discharge Air
Temperature (DAT) and Return Air
Temperature (RAT) sensors shipped
loose and are field installed. The Leaving Water Temperature (LWT) sensor is
factory installed.
4
BLK 10
BLK
L3
L1-1
L1-2
GND
CC1
YEL 83
YEL 88
L1-3
N1
N2
N3
H2
H1
HG1
N
HG2
N
BLU 21
Legend
ItemDescription
TB3
CM-1
BLK
2 - FAN MODE/HT-CL-AUTO
YEL
RED
H3
1 - ROOM SENSOR LED
L3
L2
R - 24VAC
BRN 54
TEST-1
5 - DC SIGNAL COM
BRN 55
4 - ROOM SENSOR/TO
L1
TB1
3 - SETPOINT ADJUST
A - ALARM OUTPUT
W2 - HEAT - 2
Y1 - COOL - 1
Communication
Module
RUN PRG
G - FAN
O - W3 - HEAT -3
C - 24VAC COMMON
YEL 5
CC2
T3
BLK/RED - 460V
RED - 208V
ORG - 230V
BLK - 575V
BLK
YEL
RED
DAT
L1
CM-2
BLK
L3
L2
IOEXP
COS
SLTS
LP
BLU 41
LWT
BLK 61
BLU 40
LED1
GRY 46
RV
BLK 60
H4
H6
H5
H7
H8
JP_8
JP_7
JP_6
JP_5
JP_4
JP_3
JP_2
JP_1
1
24V NO
BLK 4
RED 6
H9
RAT
24VAC COMMON
24V NC
HP
TB2
Y2 - COOL 2
JTAG
W1 - HEAT - 1
L2
L3
T3
RED 3
E - EMER SHTDN INPUT
L1
L2
T2
YEL 2
L1
T1
BLK 1
BLU
BLU 20
U - MARK IV - OCC/UNOCC
SERVICE &
DISCONNECT
24V
YEL 45
YEL 19
YEL 18
H
H
ORG 87
ORG 84
COM
BLU 15
YEL 14
X1
R2
5
2
TB1
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
YEL 11
RED 12
BLK 80
BLU 28
YEL 27
LED1
BLK 80
JTAG
YEL 82
JP8
JP1
X2
SEE NOTE
IO Expansion Module
1
CC1
CC2
CM1
CM2
COS
HP
HP2
IOEXP
LED1
LED2
*RAT
*LWT
LP
LP2
SLTS
SLTS2
R1
RV
RV2
TB1
X1
*DAT
EWT
R2
HG1
HG2
TB2
X2
Circuit 1 Compressor Contactor
Circuit 2 Compressor Contactor
Circuit 1 Compressor
Circuit 2 Compressor
Condensate Overflow Sensor
Circuit 1 High Pressure Switch
Circuit 2 High Pressure Switch
I/O Expansion Board / Harness
LED Annunciator / Harness
LED Annunciator / Harness
Return Air Temp Sensor
Leaving Water Temp Sensor
Circuit 1 Low Pressure Switch
Circuit 2 Low Pressure Switch
Circuit 1 Suction Line Temp Sensor
Circuit 2 Suction Line Temp Sensor
Fan Motor Starter
Circuit 1 Reversing Valve Solenoid
Circuit 2 Reversing Valve Solenoid
Power Terminal Block
75 VA Transformer
Discharge Air Temp Sensor
Entering Water Temp Sensor
Relay HGRH
HGRH Solenoid 1
HGRH Solenoid 2
Terminal Block
Transformer 24VAC Output
1
1
1
1
BLU
YEL
BLK 62
BLK 63
R2
AUX HEAT
1
3
TB2
YEL 89
LED2
WHT 85
24VAC COMMON
RED 86
RV2
HP2
EWT
BRN 52
LED2
BRN 53
SLTS2
BLU 42
BLU 43
LP2
HUMIDISTAT SIGNAL
Notes:1.“Run/Prg” Jumper to be in “Run” position for normal operation
____
* Leaving Water (LWT), Discharge Air (DAT) and Return Air Temperature (RAT) sensors are field installed.
Denotes optional feature
BLK 81
IM 1059-11 LARGE VERTICAL WSHP
34www.DaikinApplied.com
Typical Wiring Diagrams
MicroTech III controller with I/O expansion module – with waterside
economizer (WSE) 208/230, 460, 575-60-3
GRN/YEL 97
Note: Wiring diagrams are typical. For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.
Gray tinted areas in the wiring diagram: Units with factory installed communication module include Discharge Air Temperature (DAT) and Return Air Temperature (RAT) sensors shipped loose and are field installed. The Leaving Water Temperature (LWT) sensor is factory installed.
FAN
MOTOR
BLK 7 (L1)
YEL 8 (L2)
RED 9 (L3)
Note: Switch L2/L3 fan
motor wires for
left-hand unit
R1
GND
YEL 11
BLK 10
RED 12
BLK
TB1
X1
L1
L3
L3
T3
YEL
101
R3
L1-1
L1-2
L1-3
N1
N2
N3
H2
H1
CC1
BLU
102
BLU 21
Legend
TB3
E - EMER SHTDN INPUT
MicroTech III Controller
L1
L3
R - 24VAC
L2
TEST-1
5 - DC SIGNAL COM
ItemDescription
Circuit 1 Compressor Contactor
CC1
Circuit 2 Compressor Contactor
CC2
Circuit 1 Compressor
CM1
Circuit 2 Compressor
CM2
Condensate Overflow Sensor
COS
Circuit 1 High Pressure Switch
HP
Circuit 2 High Pressure Switch
HP2
IOEXP I/O Expansion Board / Harness
LED Annunciator / Harness
LED1
LED Annunciator / Harness
LED2
Return Air Temperature
*RAT
Leaving Water Temp Sensor
*LWT
Circuit 1 Low Pressure Switch
LP
Circuit 2 Low Pressure Switch
LP2
Circuit 1 Suction Line Temp Sensor
SLTS
SLTS2 Circuit 2 Suction Line Temp Sensor
MicroTech III Main Board
MTIII
Fan Motor Starter
R1
Circuit 1 Reversing Valve Solenoid
RV
Circuit 2 Reversing Valve Solenoid
RV2
Power Terminal Block
TB1
75 VA Transformer
X1
50 VA Transformer
X2
Discharge Air Temp Sensor
*DAT
Entering Water Temp Sensor
*EWT
Waterside Economizer
WSE
Power Terminal Block
TB2
CM-1
HP
4 - ROOM SENSOR/TO
BLK
TB1
3 - SETPOINT ADJUST
YEL
2 - FAN MODE/HT-CL-AUTO
RED
BRN 54
BRN 55
H3
1 - ROOM SENSOR LED
A - ALARM OUTPUT
W2 - HEAT - 2
TB2
Y2 - COOL 2
JTAG
W1 - HEAT - 1
Y1 - COOL - 1
Communication
Module
RUN PRG
G - FAN
O - W3 - HEAT -3
C - 24VAC COMMON
BLK 4
YEL 5
LWT
H9
RAT
BLU
104
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
CC2
R4
CM-2
BLK
YEL
LED1
RED
IOEXP
COE
COS
SLTS
LP
BLU 41
YEL
103
DAT
BLK 61
BLU 40
LED1
GRY 46
RV
BLK 60
RED 6
H4
H6
H5
H7
JP_8
JP_7
JP_6
JP_5
JP_4
JP_3
JP_2
1
24V NO
H8
24VAC COMMON
24V NC
L2
L2
T2
RED 3
U - MARK IV - OCC/UNOCC
L1
BLK 1
YEL 2
BL
BLU 20
T1
YEL 45
YEL 18
SERVICE &
DISCONNECT
YEL
YEL 14
YEL 19
BLU 15
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
L1
BLK
L3
L2
JTAG
YEL 27
BLU 28
JP8
SEE NOTE
IO Expansion Module
JP1
1
X2
1
1
1
1
BLK 62
BLK 63
LED2
YEL
85
86
RV2
LP2
HP2
BLU
BRN 53
BRN 52
SLTS2
BLU 42
BLU 43
Notes:1.“Run/Prg” Jumper to be in “Run” position for normal operation
11
5
2
87
Denotes optional feature
4
TO GRY 46
EWT
M WSE
TB2
10
R3
YEL89
4
LED2
____
* Leaving Water (LWT), Discharge Air (DAT) and Return Air Temperature (RAT) sensors are field installed.
R4
BLK 81
5
2
COE
TO COS
www.DaikinApplied.com35
LARGE VERTICAL WSHP IM 1059-11
Typical Wiring Diagrams
MicroTech III controller with I/O expansion module – with waterside
economizer (WSE) 208/230, 460, 575-60-3
FAN
MOTOR
GRN/YEL 97
BLK 7 (L1)
RED 9 (L3)
YEL 8 (L2)
Note: Switch L2/L3 fan
motor wires for
left-hand unit
T1
T3
T2
OL
R1
RED
L1
L3
L2
TB1
YEL 11
RED 12
BLK 10
Note: Wiring diagrams are typical. For the
latest drawing version refer to the
wiring diagram located on the inside of
the controls access panel of the unit.
Gray tinted areas in the wiring diagram: Units with factory installed communication module include Discharge
Air Temperature (DAT) and Return Air
Temperature (RAT) sensors shipped
loose and are field installed. The Leaving Water Temperature (LWT) sensor
is factory installed.
L1
L3
L3
L2
L2
L1
T3
RED 3
24V
COM
GND
YEL 45
T2
X1
YEL
YEL 14
BLU 15
YEL 19
T1
BLK 1
YEL 2
YEL 18
BLU
BLU 20
BLU
75
YEL
101
BLU
72
BLU
70
BLU
102
CC1
S1
M2
M1
COMPRESSOR
PROTECTOR
MODULE
YEL
77
T2
T1
S2
R3
L1-1
L1-2
L1-3
N1
N2
N3
H2
H1
TB3
E - EMER SHTDN INPUT
SERVICE &
DISCONNEW
BLK
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
U - MARK IV - OCC/UNOCC
MicroTech III Controller
BLU
74
T1
S2
S1
BLU
73
L1
BLU
71
L3
L2
A - ALARM OUTPUT
T2
M2
M1
COMPRESSOR
PROTECTOR
MODULE
YEL
76
CM-1
R - 24VAC
BRN 54
BRN 55
TEST-1
5 - DC SIGNAL COM
BLK 30
3 - SETPOINT ADJUST
4 - ROOM SENSOR/TO
YEL 31
TB1
RED 32
H3
1 - ROOM SENSOR LED
2 - FAN MODE/HT-CL-AUTO
W2 - HEAT - 2
Y1 - COOL - 1
Communication
Module
RUN PRG
G - FAN
O - W3 - HEAT -3
C - 24VAC COMMON
HP
TB2
Y2 - COOL 2
JTAG
W1 - HEAT - 1
YEL 5
RED 6
YEL
103
CC2
BLK/RED - 460V
RED - 208v
ORG - 230V
BLK - 575V
CM-2
BLK 33
YEL 34
RED 35
L1
L3
L2
BLU 28
IOEXP
COS
SLTS
LP
BLU 41
BLU
104
DAT
BLK 61
BLU 40
LED1
GRY 46
RV
BLK 60
H4
H6
H5
H7
JP_8
JP_7
JP_6
JP_5
JP_4
JP_3
JP_2
JP_1
H8
1
24V NO
R4
LWT
H9
RAT
24VAC COMMON
24V NC
Legend
BLK 4
BLK
YEL 27
LED1
JTAG
JP8
JP1
X2
SEE NOTE
IO Expansion Module
1
BLU
YEL
1
1
1
1
BLK 62
BLK 63
LED2
BRN 53
BRN 52
SLTS2
BLU 42
BLU 43
85
86
RV2
HP2
LP2
TB2
5
2
87
TO GRY 46
4
EWT
M WSE
R3
10
YEL 89
11
4
LED2
BLK 81
R4
5
2
COE
TO COS
Notes:1.“Run/Prg” Jumper to be in “Run” position for normal operation
____
IM 1059-11 LARGE VERTICAL WSHP
ItemDescription
Circuit 1 Compressor Contactor
CC1
Circuit 2 Compressor Contactor
CC2
Circuit 1 Compressor
CM1
Circuit 2 Compressor
CM2
Condensate Overflow Sensor
COS
Circuit 1 High Pressure Switch
HP
Circuit 2 High Pressure Switch
HP2
IOEXP I/O Expansion Board / Harness
LED Annunciator / Harness
LED1
LED Annunciator / Harness
LED2
Return Air Temperature
*RAT
Leaving Water Temp Sensor
*LWT
Circuit 1 Low Pressure Switch
LP
Circuit 2 Low Pressure Switch
LP2
Circuit 1 Suction Line Temp Sensor
SLTS
SLTS2 Circuit 2 Suction Line Temp Sensor
MicroTech III Main Board
MTIII
Fan Motor Starter
R1
Circuit 1 Reversing Valve Solenoid
RV
Circuit 2 Reversing Valve Solenoid
RV2
Power Terminal Block
TB1
75 VA Transformer
X1
50 VA Transformer
X2
Discharge Air Temp Sensor
*DAT
Entering Water Temp Sensor
*EWT
Waterside Economizer
WSE
Power Terminal Block
TB2
* Leaving Water (LWT), Discharge Air (DAT) and Return Air Temperature (RAT) sensors are field installed.
Denotes optional feature
36www.DaikinApplied.com
Thermostats & Wall Sensors
Thermostat connections
Cool (single stage/2-stage): 1.2°F 1.7°F
Operating ambient: 32°F to +105°F (0 to +41°C)
Operating humidity: 90% non-condensing max.
Shipping temperature range: -40 to +150°F (-40 to
+65°C)
Dimensions thermostat: 4-9/16"H x 5-13/16"W x
1-3/16"D
Programmable touch screen thermostat
(Part No. 910121750
Accessory remote sensors for the
programmable touch screen
Indoor (part # 910129095), outdoor (part #
910129096)
Specifications
Remote indoor temperature sensor measures room
temperature remote from the thermostat location. The
remote outdoor temperature sensor measures and
displays the outdoor temperature at the thermostat.
Electrical rating:
Battery power: mV to 30 VAC, NEC Class II, 50/60 Hz
or DC
Input hardwire: 20 to 30 VAC
Terminal load: 1.5A per terminal, 2.5A maximum all
terminals combined
Setpoint range: 45 to 99°F (7 to 37°C)
Rated differentials: Fast. Slow
Heat (single stage/2-stage): 0.6°F / 1.5°F
Outdoor sensor
Indoor sensor
Figure 21: MicroTech III board to programmable touch screen thermostat wiring
MicroTech III Board
SmartSource
Board
I/O Expansion
Module
Base Board
24VAC Common
Fan
Cool Stage #1
Cool Stage #2
R
C
G
Y1
Y2
Terminal Label
RC
RH
C
G
Y
Y2
W1
W2
W3
W4
L
D/A
Description
24VAC
24VAC
24VAC Common
Fan
Cool Stage #1
Cool Stage #2
Heat Stage #1
Heat Stage #2
Electric Heat Stage #1
(Heat Stage #3)
Electric Heat Stage #2
(Heat Stage #4)
Alarm Input
Dehumidification or
Waterside Economizer
TB3-1
TB3-2
TB2-2
TB1-1
Heat Stage #4
24VAC
Terminal Label
TB2-8
Humidistat
(Dehumid/WSE)
Input
Description
TB2-3
Alarm Output
TB2-5
Unoccupied Input
TB2-6
Emergency Shutdown Input
TB2-7
Heat Stage #3
TB2-9
Heat Stage #2
TB2-1
Heat Stage #1
Terminal Block
Label
TB2-4
TB1-2
W1
W2
O
E
U
A
1
W4
Typical Wiring
Thermostat
Programmable Touch Screen (Part No. 910121750)
www.DaikinApplied.com37
LARGE VERTICAL WSHP IM 1059-11
Thermostats & Wall Sensors
7-day programmable electronic thermostat,
2 heat/2 cool, auto changeover, hardwired
(Part # 910121748)
Non-programmable electronic thermostat
2 heat/2 cool, auto changeover, hardwired
(Part # 910121746)
Specifications
Specifications
Electrical rating:
• 24 VAC (18-30 VAC)
Electrical rating:
• 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperature control range: 55°F to 90°F (13°C to 32°C)
Accuracy: ± 1°F (± 0.5°C)
System configurations: 2-stage heat, 2-stage cool
Timing: Anti-short Cycle: 4 minutes (bypass anti-short
cycle delay by returning to OFF mode for 5 seconds)
Backlight Operation: 10 seconds
Terminations: A – Alarm input, L – Status input, S1 &
S2 – (Accessory Remote or Outdoor Sensor), R – 24
VAC hot, C – 24 VAC common, W1 – 1st stage heat, Y1
– 1st stage cool,
W2 – 2nd stage heat, Y2 – 2nd stage cool, G – Fan,
O – Override/reset
Figure 22: P/N 910121748 wiring
W3 - Heat 3
O
Fan
G
Cool 1
Cool 2
Y2
Heat 1
W1
Heat 2
W2
Alarm Output
A
24VAC
R
4
W3 - Heat 3
O
-
Fan
G
+
C
R
Cool 1
Y1
Y2
W1
Heat 1
W1
Y1
Heat 2
W2
W2
Alarm Output
A
Y2
24VAC
R
O
Override / optional
Notes:Includes thermostat and wall plate. Refer to the installation, operation & application guide 910121748
Install Manual
IM 1059-11 LARGE VERTICAL WSHP
C
Cool 2
G
TB1
Thermostat
Terminals
24VAC Common
C
R
-
+
Y1
Figure 23: P/N 910121746 wiring
TB2
Thermostat
Terminals
C
24VAC Common
Temperature control range: 55°F to 90°F (13°C to 32°C)
Accuracy: ± 1°F (± 0.5°C)
System configurations: 2-stage heat, 2-stage cool
Timing: Anti-short cycle: 4 minutes (bypass anti-short
cycle delay by returning to OFF mode for 5 seconds)
Backlight operation: 10 seconds
Terminations: A – Alarm input, L – Status input, S1 &
S2 – (accessory remote or outdoor sensor), R – 24 VAC
hot, C – 24 VAC common, W1 – 1st stage heat, Y1 – 1st
stage cool, W2 – 2nd stage heat, Y2 – 2nd stage cool,
G – Fan, O – Override/reset
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
TB2
• 3 amp maximum total load
Y1
W2
Y2
G
O
TB1
4
W1
Override / optional
Notes:Includes thermostat and wall plate. Refer to the installation, operation & application guide 210121746
Install Manual. *When remote reset of a lockout
condition is required at the wall thermostat, it will be
necessary to utilize a conductor between terminal
"O" on the wall thermostat to "TB1 terminal 4" on
the MicroTech III unit controller (non-programmable
stat only).
38www.DaikinApplied.com
Thermostats & Wall Sensors
Optional remote sensor (P/N 66720401)
1. Remove cover from remote sensor housing.
2. Select an appropriate location for mounting the
remote sensor.
3. Mount remote sensor unit using hardware provided.
4. Install two strand shielded wire between remote
sensor and thermostat. Shielded wire must be used.
Do not run remote sensor wire in conduit with other
wires.
■ Wire 1 should run between the S1 terminal on
the thermostat and the S1 terminal on the remote
sensor
■
Wire 2 should run between the S2 terminal on
the thermostat and the S2 terminal on the remote
sensor
■
Connect the shielding of the wire to the S2 terminal
on the thermostat
General
CAUTION
When an optional wall-mounted room temperature sensor is
connected to the unit controller, the Return Air Temperature (RAT)
sensor must not be installed. A wall-mounted room temperature
sensor and the return air temperature sensor must not be
connected simultaneously or the unit will not operate properly.
Microtech III wall-mounted room temperature sensors
provide electronic sensing of room temperatures at
wall locations. All sensor models feature a thermistor
(10kΩ) and a green LED for unit status. Tenant override,
setpoint adjustment potentiometer, thermometer, and a
communications port are optional features available in
any combination
This manual provides general information for the
Microtech III wall-mounted room temperature sensors.
For installation instructions refer to IM 955
Figure 26: MicroTech® III wall sensor details
5. Disable the main sensor (R12) on the thermostat by
cutting it from the circuit board.
0 to 1.5 K ohm
Potentiometer
Figure 24: Optional remote sensor wiring
Thermostat
3.75"
Remote Sensor
S1 S2
Fan Control
Slide Switch
Status LED
(Green)
4.59"
S1 S2
Wire 2
Cut R12 from
circuit board
Wire 1
Tenant Override Momentary
Push Button Switch
Specifications
MicroTech III wall-mounted room
temperature sensors
(Kit P/N 669529101, 669529201, 669529001)
Figure 25: MicroTech III wall-mounted room temperature
sensors (669529201 not shown)
Sensor 669529101
Mode Control
Slide Switch
Thermistor resistance: (10kΩ)(Conforms to advance
thermal products curve 2)
Ambient temperature limits
Shipping and storage: 40°F to 160°F (–40°C to 71°C)
Operating: 40°F to 140°F (4°C to 60°C)
Humidity: 5 to 95% RH, non-condensing
Locations: NEMA Type 1, Indoor only
Connections: Color coded leads
Sensor 669529001
Sensor 669529201 not shown
www.DaikinApplied.com39
LARGE VERTICAL WSHP IM 1059-11
Thermostats & Wall Sensors
Wiring sensors to the MicroTech III
controller
Figure 27: Temperature sensor wiring to MicroTech III unit
controller (Kit Part No.s 669529101, 669529201)
Figure 28: Temperature sensor wiring to MicroTech III unit
controller (669529001)
Temperature Sensor
Terminals
Temperature Sensor
Terminals
MicroTech III Unit Controller
TB1 Terminals
MicroTech III Unit Controller
TB1 Terminals
IM 1059-11 LARGE VERTICAL WSHP
40www.DaikinApplied.com
Additional Accessories
2-way motorized isolation valve
Figure 32: 2-way motorized valve wiring details
Figure 29: 2-way motorized isolation valve
Used in variable pumping type applications, the valve ac­
tuator is wired and typically piped in the return water line.
The 2-way motorized water valve kit includes the valve body,
actuator and wire harness. The 24VAC valve actuator must
be wired directly to terminal block H8 on the MicroTech III
controller. See Figure 31 on page 41 for wiring details. The
valve will only energize on a call for heating or cooling. The
1-1/4" valve is rated for 300 psig (2068 kPa and the 1-1/2"
valve is rated for 150 psig (1034 kPa).
Figure 30: Normally closed, power open motorized valve
.
Figure 31: 2-way motorized valve wiring to MicroTech III
controller
www.DaikinApplied.com41
LARGE VERTICAL WSHP IM 1059-11
Troubleshooting
MicroTech III unit controller and I/O expansion module status LED's and
fault outputs
Table 13: MicroTech III controller status LED's & fault outputs
Description
Type*
Yellow
Green
Red
I/O Expansion Communication Fail
Fault
ON
Flash
Flash
Invalid Configuration
Fault
Flash
Flash
OFF
Low Voltage Brownout
Fault
OFF
Flash
OFF
Emergency Shutdown
Mode
OFF
Flash
OFF
Compressor #1 High Pressure (HP1)
Fault
OFF
OFF
Flash
ON
Compressor #1 Low Pressure (LP1)
Fault
OFF
OFF
Compressor #1 Suction Temp Sensor Fail
Fault
Flash
Flash
ON
Freeze Fault Detect (Freeze Fault Protection Only)
Fault
Flash
OFF
Flash
Compressor #1 Low Suction Temp (LT1)
Fault
Flash
OFF
OFF
ON
Room Temp Sensor Fail (with Room Sensor Control Only)
Fault
Flash
Flash
Leaving Water Temp Sensor Fail (Freeze Fault Protection Only)
Fault
Flash
Flash
ON
Condensate Overflow (Cooling & Dehumidification Modes Only)
Fault
ON
OFF
OFF
Serial EEPROM Corrupted
Fault
ON
ON
ON
Service Test Mode Enabled
Mode
Flash
Flash
Flash
Unoccupied Mode
Mode
ON
ON
OFF
Occupied, Bypass, Standby, or Tenant Override Modes
Mode
OFF
ON
OFF
Note: * The MicroTech III baseboard LED's mode / faults are listed in order of priority.
Table 14: I/O expansion module status LED's & fault outputs
Description
Type
Yellow
Green
Red
Baseboard Communication Fail
Fault
OFF
Flash
Flash
Compressor #2 High Pressure (HP2)
Fault
OFF
OFF
Flash
Compressor #2 Low Pressure (LP2)
Fault
OFF
OFF
ON
Compressor #2 Low Suction Temp (LT2) Sensor Fail
Fault
Flash
Flash
ON
Compressor #2 Low Suction Temp (LT2)
Fault
Flash
OFF
OFF
Entering Water Temp Sensor Fail (with Boilerless Electric Heat and Waterside Economizer)
Fault
ON
OFF
Flash
Low Entering Water Temperature (No Display with Boilerless Electric Heat)
Fault
OFF
ON
Flash
Fan is OFF
Mode
OFF
ON
OFF
Fan is ON
Mode
OFF
Flash
OFF
Note:Mode / Faults are listed in order of priority.
IM 1059-11 LARGE VERTICAL WSHP
42www.DaikinApplied.com
Troubleshooting
MicroTech III unit controller LED faults and remedy
Table 15: I/O expansion communication fail
Description
Type
Yellow
Green
Red
I/O Expansion Communication Fail
Fault
ON
Flash
Flash
• Verify connection of 12 wire cable between H5 on the main board and H1 on the I/O expansion board is fully engaged in the connector.
• Verify run program jumper on the I/O expansion board is installed in the run position.
• Replace the run jumper with a spare jumper.
• Replace I/O expansion board.
Table 16: Invalid configuration
Description
Type
Yellow
Green
Red
Invalid Configuration
Fault
Flash
Flash
OFF
• Verify jumper selection on both the main board and I/O expansion board. Jumper selections must be verified using the jumper configuration setting outline in this manual.
Table 17: Low voltage brownout / emergency shutdown
Description*
Type
Yellow
Green
Red
Low Voltage Brownout
Fault
OFF
Flash
OFF
Emergency Shutdown
Mode
OFF
Flash
OFF
* Same LED display for both conditions
• Verify the E terminal is not connected to common. Remove wire, if connected, and LED should change to solid green only.
• Confirm the low voltage supply is between 19-32VAC at the H1 terminal of the main board. If the low voltage supply is out of range, verify the unit
supply voltage matches the nameplate voltage and the correct transformer primary wire has been selected.
Table 18: Compressor high pressure
Description
Type
Yellow
Green
Red
Compressor High Pressure
Fault
OFF
OFF
Flash
• Verify high pressure switch is connected to terminal H3 on the main board.
• Check for continuity of the high pressure switch.
If the high pressure fault resets when power is recycled:
• Check water flow (cooling operation)
• Check airflow (heating operation)
• Entering water and air temperatures should be within the operating limits.
Table 19: Compressor low pressure
Description
Type
Yellow
Green
Red
Compressor Low Pressure
Fault
OFF
OFF
ON
• Loose wire connection on low pressure circuit
• Failed low pressure switch
• Unit is low on charge
Table 20: Compressor suction temp sensor fail, room temp sensor fail, leaving water temp sensor fail
Description
Type
Yellow
Green
Red
Compressor Suction Temp Sensor
Fail
Fault
Flash
Flash
ON
Room Temp Sensor Fail (Room Sensor Control Only)
Fault
Flash
Flash
ON
Leaving Water Temp Sensor Fail
Fault
Flash
Flash
ON
• Check connection of low suction temperature sensor on terminal H6 pins 2 and 3.
• Check resistance of low suction temperature sensor, leaving water temperature sensor, and room sensor or return air sensor. All sensors are
10kohm thermistor @77°F.
• Return air sensor and room sensor shall not be connected simultaneously.
www.DaikinApplied.com43
LARGE VERTICAL WSHP IM 1059-11
Troubleshooting
Table 21: Compressor low suction temp
Description
Type
Yellow
Green
Red
Compressor Low Suction Temp
Fault
Flash
OFF
OFF
• Check water flow (heating operation)
• Check airflow (cooling operation)
• Entering water and air temperatures should be within the operating limits.
Table 22: Freeze fault detect
Description
Type
Yellow
Green
Red
Freeze Fault Detect
Fault
Flash
OFF
Flash
• Low entering water temperature (below 35°F standard range or 13.5°F extended range)
Table 23: Condensate overflow
Description
Type
Yellow
Green
Red
Condensate Overflow
Fault
ON
OFF
OFF
• Poor condensate drain
• Check the resistance to ground on condensate wire. This should be open if there is no water in the pan.
Table 24: Serial EEPROM corrupted
Description
Type
Yellow
Green
Red
Serial EEPROM Corrupted
Fault
ON
ON
ON
• Replace main board
Table 25: Waterside economizer low temp cutout (WSE control & call for cooling)
Description
Type
Yellow
Green
Red
Waterside Economizer Low Temp
Cutout (WSE Control & Call for
Cooling)
Mode
Flash
ON
Flash
Description
Type
Yellow
Green
Red
Service Test Mode Enabled
Mode
Flash
Flash
Flash
• Water temperature is below 35°F.
Table 26: Service test mode enabled
• Jumper JP1 is shorted for test mode operation.
Table 27: Unoccupied mode
Description
Type
Yellow
Green
Red
Unoccupied Mode
Mode
ON
ON
OFF
• Terminal U on main control board is connected to common from external source.
Table 28: Occupied, bypass, standby, or tenant override modes
Description
Type
Yellow
Green
Red
Occupied, Bypass, Standby, or Tenant Override Modes
Mode
OFF
ON
OFF
• Unit is operating normal. It may currently have a control signal or ready to operate when a control signal is active.
IM 1059-11 LARGE VERTICAL WSHP
44www.DaikinApplied.com
Troubleshooting
I/O expansion module LED faults and remedy
Table 29: Baseboard communication fail
Description
Type
Yellow
Green
Red
Baseboard Communication Fail
Fault
Flash
OFF
Flash
• Verify jumper JP8 on main board is shorted.
• Verify connection of cable between H5 on main board and H1 on I/O expansion board.
Table 30: Compressor #2 high pressure
Description
Type
Yellow
Green
Red
Compressor #2 High Pressure
Fault
OFF
OFF
Flash
• Verify high pressure switch is connected to terminal HP2 on the I/O expansion.
• Check for continuity of the high pressure switch.
If the high pressure fault resets when power is recycled:
• Check water flow (cooling operation)
• Check airflow (heating operation)
• Entering water and air temperatures should be within the operating limits
Table 31: Compressor #2 low pressure
Description
Type
Yellow
Green
Red
Compressor #2 Low Pressure
Fault
OFF
OFF
ON
• Loose wire connection on low pressure circuit
• Failed low pressure switch
• Circuit #2 is low on charge
Table 32: Compressor #2 low suction temp
Description
Type
Yellow
Green
Red
Compressor #2 Low Suction Temp
Fault
Flash
OFF
OFF
• Check water flow (heating operation)
• Check airflow (cooling operation)
• Entering water and air temperatures should be within the operating limits.
Table 33: Compressor #2 low suction temp
Description
Type
Yellow
Green
Red
Compressor #2 Low Suction Temp
Fault
Flash
OFF
OFF
• Check water flow (heating operation)
• Check airflow (cooling operation)
• Entering water and air temperatures should be within the operating limits.
Table 34: Compressor suction temp sensor fail
Description
Type
Yellow
Green
Red
Compressor Suction Temp Sensor
Fail
Fault
Flash
OFF
OFF
• Check connection of low suction temperature sensor on terminal H7 pins 1 and 2.
• Check resistance of low suction temperature sensor. All sensors are 10kohm thermistor @77°F.
Table 35: Entering water temp sensor fail (boilerless electric heat or waterside economizer only)
Description
Type
Yellow
Green
Red
Entering Water Temp Sensor Fail
(Boilerless Electric Heat or Waterside
Economizer Only)
Fault
ON
OFF
Flash
• Verify connections at terminals H4 on the I/O expansion board
• Verify resistance of EWT thermistor is 10K @ 77°F.
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LARGE VERTICAL WSHP IM 1059-11
Troubleshooting
Table 36: Low entering water temperature (no display on boilerless electric heat)
Description
Type
Yellow
Green
Red
Low Entering Water Temperature (No
Display On Boilerless Electric Heat)
Fault
OFF
ON
Flash
• Verify entering water temperature is greater than set point.
Additional troubleshooting for size 290 only
IMPORTANT
The compressors in this unit are supplied with advanced
diagnostics. Should this unit fail to operate properly with solid
green lights (no faults) check the module on each compressor
and refer to the troubleshooting section in this manual.
Table 37: CoreSense™ communications LED flash code information
Status
Fault Conditions
Code Fault Description
Code Reset Description
Troubleshooting Information
Solid Green
Normal Operation
Module is powered and
operation in normal
N/A
N/A
Solid Red
Module Malfunction
Module has internal fault
N/A
1) Reset module by removing
power from T2-T1
2) Replace module
Green Flash Code 1
Loss of Communication
Module and master controller
have lost communications with
each other for more than 5
minutes
When communications are
confirmed
Green Flash Code 2
Future Use
N/A
N/A
N/A
Warning LED Flash
1) Check the control wiring
2) Verify dipswitch 8 is "ON"
Green Flash Code 3
Short Cycling
Run time of less than 1
minute; number of short cycles
exceeds 48 in 24 hours
<48 short cycles in 24 hours
1) Check system charge and
pressure control setting
2) Adjust set-point of temperature controller
3) Install anti-short cycling
control
Green Flash Code 4
Improper dipswitch 9 setting
N/A
N/A
Verify dipswitch 9 is "OFF"
Green Flash Code 5
Future Use
N/A
N/A
N/A
Alert Lockout LED Flash
Red Code Flash 1
Motor High Temperature
Ω > 4.5K; Lockout after 5
alerts
Ω > 2.75K and minutes
1) Check supply voltage
2) Check system charge &
superheat
3) Check contactor
40 < Ω < 2.75K and 30
minutes
1) Check for poor connections
at module and thermistor
fusite
2) Adjust set point of temperature controller
3) Install anti-short cycling
control
Open/Shorted Motor
Thermistor
Ω > 220K or Ω < 40; Lockout
after 6 hours
Short Cycling
Run time of less than 1
minute; Lockout if the number
of alerts exceeds the number
configured by the user in 24
hours
Interrupt power to T2-T1 or
perform Modbus reset command
1) Check system charge and
pressure control setting
2) Adjust set point of temperature controller
3) Install anti-short cycling
control
Red Flash Code 4
Not Used
N/A
N/A
N/A
Red Flash Code 5
Future Use
N/A
N/A
N/A
Red Flash Code 2
Red Flash Code 3
IM 1059-11 LARGE VERTICAL WSHP
46www.DaikinApplied.com
Troubleshooting
CoreSense communications LED flash code information (continued)
Red Flash Code 6
Missing phase
Missing phase; Lockout after
10 consecutive alerts
After 5 minutes and missing
phase condition is not present
1) Check incoming power
2) Check fuses/breakers
3) Check contactor
1) Check incoming phase
sequence
2) Check contactor
3) Check module phasing
wires A-B-C
Red Flash Code 7
Reverse phase
Reverse phase; Lockout after
1 alert
Interrupt power to T2-T1 or
perform Modbus reset command
Red Flash Code 8
Future Use
N/A
N/A
Red Flash Code 9
Module Low Voltage
Low voltage on T2-T1
terminals*
N/A
After 5 minutes and the
voltage is back in the normal
range
1) Verify correct module p/n
2) Check VA rating of transformer
3) Check for blown fuse in
transformer secondary
Notes:
The flash code number corresponds to the number of LED flashes, followed by a pause, and then the flash code is repeated. A lockout condition produces a red flash, followed by a pause, a solid red, a second pause, and then repeated.
* This alert does not result in a Lockout
Troubleshooting water source heat pump units
Table 38: Troubleshooting refrigeration circuit
Head
Pressure
Suction
Pressure
Charge
Undercharge System (Possible Leak)
Low
Low
Low
Overcharge System
High
High
High
Low Air Flow Heating
High
High
High
Low Air Flow Cooling
Low
Low
Low
Symptom
Low
Low
Normal
Normal
Low Water Flow Cooling
High
High Air Flow Heating
Low
High Air Flow Cooling
Low Water Flow Heating
Compressor
Super Heat
Amp Draw
Safety
Subcooling
Air Temp
Differential
Water (loops)
Temp Differential
Lock Out
High
Low
Low
Low
Low Pressure
Normal
High
Normal
High Pressure
High
Normal
Low
Normal
Normal
Low
Low
High
Low
High Pressure
High
High
Low
Low Temp
High
Low
High
Low Temp
High Pressure
Low
Low
High
High
High
Low
Low
High
Low
Low
Low
High
Low
Low
Low Temp
Low
High
Normal
High
Low
Low
Normal
High Pressure
High Water Flow Heating
Normal
Low
Normal
High
Normal
Normal
Low
High Pressure
High Water Flow Cooling
Low
Low
Low
Low
High
Normal
Low
Low Temp
High
High
Low
Low
TXV Restricted
High
Low
Normal
Low
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LARGE VERTICAL WSHP IM 1059-11
Troubleshooting
Figure 33: Troubleshooting guide - unit operation
Low voltage, check
power supply voltage
Fuse may be blown,
circuit breaker is open
Wire may be loose or broken.
Replace or tighten wires
Unit control, check thermostat
for correct wiring or faulty
thermostat
Check wiring - loose or
broken and check for faulty
connection
Neither fan, nor compressor
runs and all LED lights
are off
Check relays and contacts,
also capacitor and wiring
Check high pressure switch,
low pressure switch and low
temperature switch to see if
unit is cycling on the safety
Compressors runs
in short cycle
Unit
Fan operates,
compressor does not
Check wiring - loose or broken
and check for bad connection
High or Low pressure lockout
A. Cool mode, check water flow
B. Heating mode, check air flow
C. Check reversing valve for
proper valve position
Check compressor overload make sure it is closed
Check to see if the reversing
valve is not hung up and is
operating correctly
Check compressor to ground, or
for internal short to ground
Check condensate overflow
switch in cool mode of
operation
Compressor winding may be
open. Check continuity with
ohm meter
Check thermostat for
proper location
Compressor attempts to
start but does not
Insufficient cooling or
heating
Check compressor wiring
for defective wiring or loose
connection
Check for defective
compressor internal windings
with ohm meter
Check thermostat for
improper location
Check for lock rotor amp
draw
Check blower assembly for
dirt or faulty fan motor
capacity
Check for proper air flow filter could be dirty
Check for low refrigerant
charge
Check amp draw on blower
assembly
Check for proper water flow
and delta T (°F)
IM 1059-11 LARGE VERTICAL WSHP
48www.DaikinApplied.com
General Maintenance
Lubrication
R-410A should be used only with polyester (POE)
oil. The HFC refrigerant components in R-410A will
not be compatible with mineral oil or alkylbenzene
lubricants. R-410A systems will be charged with the
OEM recommended lubricant, ready for use with R-410A.
Charging
Due to the zeotropic nature of R-­410A, it should be
charged as a liquid. In situations where vapor is normally
charged into a system, a valve should be installed in the
charging line to flash the liquid to vapor while charging.
­Make certain that the recycle or recovery equipment
used is designed for R-410A. The pressure of R-410A
refrigerant is approximately 60 percent greater than
that of R-22. Pressure gauges require a range up to
800 PSIG high side and 250 PSIG low side. Recovery
cylinders require a 400 PSIG rating – do not put R-410A
in a 300 PSIG rated cylinder.
WARNING
Recycle/recovery equipment must be designated for R-410A.
R-410A pressure is greater than R-22. Improper equipment can
cause severe injury or death.
Note: Because a water source heat pump operates
under a wide range of water and air temperatures, the values printed below are to be taken
as suggested pressure and temperatures.) All
Daikin water source heat pumps are designed for
commercial use. The units are designed for the
cooling mode of operation and fail safe to cooling.
The reversing valve is energized for the heating
mode of operation.
Superheat
8 to 14 degrees
General maintenance
1. Normal maintenance on all units is generally
limited to filter changes. Units are provided with
permanently lubricated motors and require no oiling
even though oil caps may be provided.
2. Filter changes are required at regular intervals. The
time period between changes will depend upon
the project requirements. Some applications such
as motels produce a lot of lint from carpeting and
linen changes, and will require more frequent filter
changes. Check filters at 60-day intervals for the
first year until experience is acquired. If light cannot
be seen through the filter when held up to sunlight
or a bright light, it should be changed. A more critical
standard may be desirable.
3. The condensate drain pan should be checked
annually and cleaned and flushed as required.
4. Record performance measurements of volts, amps,
and water temperature differences (both heating
and cooling). A comparison of logged data with startup and other annual data is useful as an indicator of
general equipment condition.
5. Periodic lockouts almost always are caused by
air or water problems. The lockout (shutdown) of
the unit is a normal protective result. Check for
dirt in the water system, water flow rates, water
temperatures, airflow rates (may be a dirty filter),
and air temperatures. If the lockout occurs in the
morning following a return from night setback,
entering air below machine limits may be the cause.
Head Pressure Water Delta T
335-355 PSIG
10° to 14°
Note: All information above is based on ISO standard
13256-1 and tested at these conditions.
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LARGE VERTICAL WSHP IM 1059-11
Typical Refrigeration Cycles
Typical cooling refrigeration cycle – dual
compressors
Note: Typical temperature readings are at full load conditions at ISO-13256 for boiler-tower applications.
When the wall thermostat calls for COOLING, the
reversing valve (de-energized) directs the flow of the
refrigerant, a hot gas, from the compressor to the waterto-refrigerant heat exchanger (coaxial heat exchanger).
There, the heat is removed by the water, and the hot
IM 1059-11 LARGE VERTICAL WSHP
gas condenses to become a liquid. The liquid then
flows through a thermal expansion valve to the air-torefrigerant heat exchanger coil (evaporator). The liquid
then evaporates and becomes a gas, at the same time
absorbing heat and cooling the air passing over the
surfaces of the coil. The refrigerant then flows as a low
pressure gas through the reversing valve and back to the
suction side of the compressor to complete the cycle.
Figure 34: Cooling refrigeration cycle
50www.DaikinApplied.com
Typical Refrigeration Cycles
Typical heating refrigeration cycle – dual
compressors
Note: Typical temperature readings are at full load conditions at ISO-13256 for boiler-tower applications.
When the wall thermostat calls for HEATING, the
reversing valve (energized) directs the flow of the
refrigerant, a hot gas, from the compressor to the airto-refrigerant heat exchanger coil (condenser). There,
the heat is removed by the air passing over the surfaces
of the coil and the hot gas condenses and becomes a
liquid. The liquid then flows through a thermal expansion
valve to the water-to-refrigerant heat exchanger
(evaporator). The liquid then evaporates and becomes
a gas, at the same time absorbing heat and cooling the
water. The refrigerant then flows as a low pressure gas
through the reversing valve and back to the suction side
of the compressor to complete the cycle.
Figure 35: Heating Refrigeration Cycle
www.DaikinApplied.com51
LARGE VERTICAL WSHP IM 1059-11
Typical Refrigeration Cycles
Typical hot gas reheat refrigeration
cycle – dual compressors
When the DEHUMID setting is not satisfied and COOLING has
been satisfied the reversing valve remains (de-energized) but
the hot gas reheat (HGRH) valve is (energized). This directs
the flow of the refrigerant, a hot gas, from the compressor
through the hot gas reheat (HGRH) coil thus heat is removed
from the refrigerant gas to reheating the cooled air from the
evaporator coil. Then the refrigerant flows to the water-to-
refrigerant heat exchanger (coaxial heat exchanger). There,
the heat is removed by the water, and the hot gas condenses
to become a liquid. The liquid then flows through a thermal
expansion valve to the air-to-refrigerant heat exchanger coil
(evaporator). The liquid then evaporates and becomes a gas,
at the same time absorbing heat and cooling the air passing
over the surfaces of the coil. The refrigerant then flows as a
low pressure gas through the reversing valve and back to the
suction side of the compressor to complete the cycle.
Figure 36: Hot gas reheat refrigeration cycle
IM 1059-11 LARGE VERTICAL WSHP
52www.DaikinApplied.com

Water source heat pump equipment check, test and start form
This form must be completed and submitted within ten (10) days of start‑up to comply with the terms of the Daikin warranty. Forms should
be returned to Daikin Warranty Department.
Installation Data
Job Name __________________________________________________________ Check, Test & Start Date _________________
City or Town___________________________________________ State__________________________ Zip_________________
Who is Performing CTS______________________________________ Equipment Type (Check all that apply)
□Closed Loop □Open Loop
□Geothermal □Other (specify)______________
General Contractor__________________________________________
Essential Items Check of System – Note: “No” answers below require notice to installer by memorandum (attached copy.)
Essential Items Check
A. Voltage Check___________ Volts
Loop Temp.____________ °F Heating
B. Yes
□
□
□
□
□
□
□
□
□
No
□
□
□
□
□
□
□
□
□
□ □
□ □
System Water P.H. Levels___________
Set For____________ °F Cooling
Condition
Comments
Loop Water Flushed Clean __________________________________________________________________
Closed Type Cooling Tower __________________________________________________________________
Water Flow Rate to Heat Pump Balanced _______________________________________________________
Standby Pump Installed ____________________________________________________________________
System Controls Functioning ________________________________________________________________
Outdoor Portion of Water System Freeze Protected _______________________________________________
Loop System Free of Air ____________________________________________________________________
Filters Clean _____________________________________________________________________________
Condensate Traps Installed __________________________________________________________________
Note: “No” answers below require notice to installer by memorandum (attached copy.)
Outdoor Air to Heat Pumps: _________________________________________________________________
Other Conditions Found: ____________________________________________________________________
Please include any suggestions or comments for Daikin Applied:____________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
Above System is in Proper Working Order
Note: This form must be filled out and sent to the warranty administrator before any service money can be released.
Date
For Internal Use
Release:
SM _________________________
CTS _________________________
T _________________________
Signature for Sales Representative
Signature for Customer
Service Manager Approval
Date
www.DaikinApplied.com53
LARGE VERTICAL WSHP IM 1059-11

Unit check / equipment data
Installation Data
Job Name____________________________________________________ Check Test Date:___________________________
City ___________________________________________________________ State________________ Zip_______________
Daikin Model #_______________________________________________________
Daikin Serial #________________________________________ Job site Unit ID # (HP #)______________________________
General Contractor:______________________________________ Mechanical Contractor:______________________________
Technician Performing Start-Up: Name_______________________________ Employer:______________________________
Complete equipment data from measurements taken at the locations indicated on the drawing below.
Equipment Data
Flow Rate
EWP - LWP = ∆P
1 EWP - PSI In__________________minus
2 LWP - PSI Out___________ equals ∆P_____________
The first step in finding GPM is to subtract leaving water pressure from entering water pressure. The difference between the two
is referred to as ∆P. ∆P can be converted to GPM by looking in the equipment specificaton catalog. Caution ∆P ≠ GPM
Note: A conversion table must be used to find GPM from (Delta) ∆P measurements.
Loop Fluid Temperature Rise / Drop through Coaxial Heat Exchanger EWT - LWT = ∆T
4 LWT - °F Out___________________ equals Fluid ∆T________________
3 EWT - °F Out__________________ minus
∆T is the rise or drop in the fluid temperature as it passes through the Coaxial.
Air Temperature Rise / Drop through the air coil
∆T x CFM x 1.08 = BTUH Sensible
6 LAT - °F Out____________________ equals Air ∆T__________________
5 EAT - °F In____________________ minus
Note: Perform Check, Test and Start-Up in the Cooling Mode Only.
EWT- Entering Water Temperature
EWP- Entering Water Pressure
EAT- Entering Air Temperature
∆- Delta (Differential)
LWT - Leaving Water Temperature
LWP - Leaving Water Pressure
LAT - Leaving Air Temperature
CFM - Cubic Feet/Minute
BTUH-British Thermal Units/Hour
Check, Test & Start
LAT
V
Discharge
Hot Gas
V
C
O
I
L
Reversing Valve
6
V
V
EAT
Air Temperature °F
OUT
V
5
A
I
R
Suction
COAX
Expansion
Valve
Compressor
Loop Fluid Pressure (In PSI)
EWP
1
Loop Fluid Temperature °F
EWT
3
V
IN
INOUT
V
2
LWP
4
LWT
Form No._____________________________
IM 1059-11 LARGE VERTICAL WSHP
54www.DaikinApplied.com

Commercial check, test and start worksheet
(Complete all equipment measurements indicated for each unit per installation on previous page)
Model
Serial #
H.P. #
EWT
3
LWT
4
EWP
1
LWP
2
EAT
5
LAT
6
Volts
Amps
Cooling
Check
Air
Filter
and
Coil
Comments
(provide comments on
additional sheets)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
Part No.______________________________
www.DaikinApplied.com55
LARGE VERTICAL WSHP IM 1059-11
Daikin Applied Training and Development
Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high
priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com
and click on Training, or call 540-248-9646 and ask for the Training Department.
Warranty
All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local Daikin Applied representative for warranty details. Refer to Form
933-430285Y. To find your local Daikin Applied representative, go to www.DaikinApplied.com.
Aftermarket Services
To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787).
To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.DaikinApplied.com.
Products manufactured in an ISO Certified Facility.
IM 1059-11
©2018 Daikin Applied (01/18) | (800) 432–1342 | www.DaikinApplied.com
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