RHS Series Service and Maintenance Instructions

RHS Series Service and Maintenance Instructions
RHS Series
3 to 8.5 Ton
Package Electric Heat Pump Units
With R--410A Refrigerant
3 to 6 Ton
7--1/2 to 8--1/2 Ton
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 2
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
UNIT ARRANGEMENT AND ACCESS . . . . . . . . . . . . . . . 3
PRE--START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . . . . 4
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
HEAT PUMP REFRIGERATION SYSTEM . . . . . . . . . . . . 8
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 43
R--410A REFRIGERANT . . . . . . . . . . . . . . . . . . . . . . . . . 13
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . 46
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . . . 14
APPENDIX I. MODEL NUMBER SIGNIFICANCE . . . . . 47
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . . . 19
APPENDIX II. PHYSICAL DATA . . . . . . . . . . . . . . . . . . . 48
HEAT PUMP CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . 19
APPENDIX III. FAN PERFORMANCE . . . . . . . . . . . . . . 50
PROTECTIVE CONTROLS . . . . . . . . . . . . . . . . . . . . . . . 20
APPENDIX IV. ELECTRICAL INFORMATION . . . . . . . 60
COMMERCIAL DEFROST CONTROL . . . . . . . . . . . . . 21
APPENDIX V. WIRING DIAGRAM LIST . . . . . . . . . . . . 68
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
APPENDIX VI. MOTORMASTER SENSOR
LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . 32
UNIT START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . 71
Service and Maintenance Instructions
516 08 2301 00
6/25/09
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install, repair, or service air-conditioning
equipment. Untrained personnel can perform the basic
maintenance functions of replacing filters. Trained service
personnel should perform all other operations.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to
the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations.
Have fire extinguishers available for all brazing
operations.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety--alert
. When you see this symbol on the unit and in
symbol
instructions or manuals, be alert to the potential for
personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety--alert
symbol. DANGER identifies the most serious hazards
which will result in severe personal injury or death.
WARNING signifies a hazard which could result in
personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury
or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in
personal injury or death.
Before performing service or maintenance
operations on unit, turn off main power switch to
unit. Electrical shock and rotating equipment could
cause injury.
2
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in
personal injury or death.
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet
for power status before opening unit for service.
Locate its disconnect switch, if appropriate, and
open it. Tag--out this switch, if necessary.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R--410A refrigerant systems operate at higher
pressures than standard R--22 systems. Do not
use R--22 service equipment or components on
R--410A refrigerant equipment.
!
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death. Relieve pressure and recover all
refrigerant before system repair or final unit
disposal. Wear safety glasses and gloves when
handling refrigerants. Keep torches and other
ignition sources away from refrigerants and oils.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in
personal injury.
Sheet metal parts may have sharp edges or burrs.
Use care and wear appropriate protective
clothing, safety glasses and gloves when handling
parts and servicing air conditioning units.
UNIT ARRANGEMENT AND ACCESS
General
Fig. 1 and Fig. 2 show general unit arrangement and
access locations.
FIGURE 1
Typical Access Panel Location
S Control box cleanliness and wiring condition
S Wire terminal tightness
S Refrigerant charge level
S Indoor coil cleaning
S Supply blower motor amperage
Electric Heating
S Power wire connections
S Fuses ready
S Manual--reset limit switch is closed
Economizer or Outside Air Damper
(3 to 6 Ton)
FIGURE 2
Blower Access Panel Location
S Inlet filters condition
S Check damper travel (economizer)
S Check gear and dampers for debris and dirt
Air Filters and Screens
Each unit is equipped with return air filters. If the unit has
an economizer, it will also have an outside air screen. If a
manual outside air damper is added, an inlet air screen
will also be present.
Each of these filters and screens will need to be
periodically replaced or cleaned.
Return Air Filters
Return air filters are disposable fiberglass media type.
Access to the filters is through the small lift--out panel
located on the rear side of the unit, above the
evaporator/return air access panel. (See Fig. 1.)
(7--1/2 to 10 Ton)
Routine Maintenance
These items should be part of a routine maintenance
program, to be checked every month or two, until a
specific schedule for each can be identified for this
installation:
Quarterly Inspection (and 30 days after initial start)
S
S
S
S
S
S
S
S
Return air filter replacement
Outdoor hood inlet filters cleaned
Belt tension checked
Belt condition checked
Pulley alignment checked
Fan shaft bearing locking collar tightness checked
Outdoor coil cleanliness checked
Condensate drain checked
To remove the filters:
1. Grasp the bottom flange of the upper panel.
2. Lift up and swing the bottom out until the panel
disengages and pulls out.
3. Reach inside and extract the filters from the filter rack.
4. Replace these filters as required with similar
replacement filters of same size.
To re--install the access panel:
1. Slide the top of the panel up under the unit top panel.
2. Slide the bottom into the side channels.
3. Push the bottom flange down until it contacts the top
of the lower panel (or economizer top).
IMPORTANT: DO NOT OPERATE THE UNIT WITHOUT
THESE FILTERS!
Outside Air Hood
These items should be checked at the beginning of each
season (or more often if local conditions and usage
patterns dictate):
Outside air hood inlet screens are permanent
aluminum--mesh type filters. Check these for cleanliness.
Remove the screens when cleaning is required. Clean by
washing with hot low--pressure water and soft detergent
and replace all screens before restarting the unit. Observe
the flow direction arrows on the side of each filter frame.
Air Conditioning/Heat Pump
Economizer Inlet Air Screen
S Outdoor fan motor mounting bolts tightness
S Compressor mounting bolts
S Outdoor fan blade positioning
This air screen is retained by spring clips under the top
edge of the hood. (See Fig. 3.)
Seasonal Maintenance
3
SUPPLY FAN (BLOWER) SECTION
Filter Installation
FIGURE 3
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause
personal injury or death.
Before performing service or maintenance
operations on the fan system, shut off all unit
power and tag--out the unit disconnect switch. Do
not reach into the fan section with power still
applied to unit.
DIVIDER
OUTSIDE
AIR
HOOD
CLEANABLE
ALUMINUM
FILTER
Supply Fan (Direct--Drive)
FILTER
BAROMETRIC
RELIEF
FILTER
CLIP
To remove the filter, open the spring clips. Re--install the
filter by placing the frame in its track, then closing the
spring clips.
Manual Outside Air Hood Screen
This inlet screen is secured by a retainer angle across the
top edge of the hood. (See Fig. 4.)
FIGURE 4
WARNING
!
17 1/4”
For unit sizes 036 -- 060 (3--5 Ton), the Standard Static
supply fan system consists of a direct--drive
forward--curved centrifugal blower wheel attached to the
motor shaft. The motor has taps to provide the servicer
with the selection of one of five motor torque/speed
ranges to best match wheel performance with attached
duct system. See Fig. 5 Direct--Drive Fan Assembly) and
Fig. 6 (EMC Motor Connectors).
Direct Drive Supply Fan Assembly
FIGURE 5
EMC Motor
Screens Installed on Outdoor Air Hood
(7.5 to 8.5 Ton Shown)
95°
EMC Power
Transformer
(460, 575v)
Motor Plug Position
(95° from vertical)
FIGURE 6
EMC Motor Connectors
L2
YEL
To remove the screen, loosen the screws in the top
retainer and slip the retainer up until the filter can be
removed. Re--install by placing the frame in its track,
rotating the retainer back down and tighten all screws.
Gnd
GRN/YEL
Motor
Power
Connections
L1
BLU
C L G N
Com
BRN
Speed
Taps
1 2 3 4 5
VIO
Default Connection
4
FIGURE 7
EMC Unit Wiring
460, 575-v Units
208/230-v Units
ECM Motor – The direct--drive motor is an X13
Electronically Commutated motor (ECM). An ECM
contains electronic circuitry to convert single--phase line
AC voltage into a 3--phase DC voltage to power the motor
circuit. The motor circuit is a DC brushless design with a
permanent magnet rotor. On the X13 design, the
electronic circuitry is integral to the motor assembly and
cannot be serviced or replaced separately.
Table 1 – RHS Standard Static Motor Tap Programing
(percent of full--load torque)
Unit Size
036
048
060
Tap 1
32
46
73
Tap 2
38
58
82
Tap 3
45
61
85
Tap 4
50
69
90
Tap 5
100
100
100
Factory Default: Tap 1 (VIO)
208/230--v units use a 230--v motor. 460--v units use a
230--v motor with a stepdown transformer (mounted on
the end of the fan housing, see Fig. 5). 575--v units use a
460--v motor with an autotransformer. Motor power
voltage is connected to motor terminals L and N (see
Fig.6 and Fig. 7); ground is connected at terminal G. The
motor power voltage is ALWAYS present; it is not
switched off by a motor contactor.
To select another speed:
Motor operation is initiated by the presence of a 24--v
control signal to one of the five motor communications
terminals. When the 24--v signal is removed, the motor
will stop. The motor control signal is switched by the
defrost board’s IFO output.
Motor “rocking” on start--up – When the motor first starts,
the rotor (and attached wheel) will “rock” back and forth
as the motor tests for rotational direction. Once the
correct rotation direction is determined by the motor
circuitry, the motor will ramp up to specified speed. The
“rocking” is a normal operating characteristic of ECM
motors.
Evaluating motor speed – The X13 ECM is a constant
torque motor design. The motor speed is adjusted by the
motor control circuitry to maintain the programmed shaft
torque. Consequently there is no specific speed value
assigned to each control tap setting. At the Position 5 tap,
the motor speed is approximately 1050 RPM (17.5 r/s) but
it will vary depending on fan wheel loading.
Selecting speed tap – The five communications terminals
are each programmed to provide a different motor torque
output. See Table 1. Factory default tap selection is
Position 1 for lowest torque/speed operation.
1. Disconnect main power to the unit.
2. Remove the motor signal lead (VIO) at the motor
communications terminal.
3. Reconnect the motor signal lead to the desired speed
terminal.
4. Connect main power to the unit.
Troubleshooting the ECM motor – Troubleshooting the
X13 ECM requires a voltmeter.
1. Disconnect main power to the unit.
2. Remove the motor power plug (including the control
BRN lead) and VIO control signal lead at the motor
terminals.
3. Restore main unit power.
4. Check for proper line voltage at motor power leads
BLK (from L terminal) and YEL (from N terminal).
5
Table 2 – Motor Test Volts
Unit Voltage
208/230
460
575
Motor Voltage
230
230
460
Min--- Max Volts
190---250
210---250
420---500
5. Apply a jumper at unit control terminals R to G to
initiate a demand for motor operation. Check for 24--v
output at defrost board terminal IFO.
6. Check for proper control signal voltage at motor signal
leads VIO and BRN. Signal should be 22 to 28--v.
7. Disconnect unit main power.
8. Reconnect motor power and control signal leads at
the motor terminals.
9. Restore unit main power.
Motor should start and run. If it does not, remove the
motor assembly. Replace with same motor part number;
do not substitute with an alternate design as torque/speed
programming will not be same as on original factory
motor.
Replacing the ECM Motor – Before removing the ECM
belly--band mounting ring, measure the distance between
the base of the motor shaft and the edge of the mounting
ring. Remove the motor mounting band and transfer to the
replacement motor. Position the mounting band at
distance measured in first step. Snug the mounting bolt
but do not tighten yet.
Insert the motor shaft into the fan wheel hub. Then secure
the three motor mount arms to the support cushions.
Torque the arm mounting screws to 60 in--lbs (6.8 N--m).
Center the fan wheel in the fan housing. Torque the fan
wheel hub setscrew to 120 in--lbs (13.6 N--m).
Ensure the motor terminals are located at a position
below the 3 o’clock position (see Fig. 5). Tighten the
motor belly--band bolt to 80 in--lbs (9.0 N--m).
Supply Fan (Belt--Drive)
The belt--drive supply fan system consists of a
forward--curved centrifugal blower wheel on a solid shaft
with two concentric type bearings, one on each side of the
blower housing. A fixed--pitch driven pulley is attached to
the fan shaft and an adjustable--pitch driver pulley is on
the motor. The pulleys are connected using a “V” type
belt. (See Fig. 8.)
FIGURE 8
6
Belt Drive Motor Monitoring
Belt
Check the belt condition and tension quarterly. Inspect the
belt for signs of cracking, fraying or glazing along the
inside surfaces. Check belt tension by using a
spring--force tool (such as Browning’s Part Number “Belt
Tension Checker” or equivalent tool); tension should be
6--lbs at a 5/8 --in. deflection when measured at the
centerline of the belt span. This point is at the center of
the belt when measuring the distance between the motor
shaft and the blower shaft.
NOTE: Without the spring--tension tool, place a straight
edge across the belt surface at the pulleys, then deflect
the belt at mid--span using one finger to a 1/2 --in.
deflection.
Adjust belt tension by loosening the motor mounting plate
front bolts and rear bolt and sliding the plate toward the
fan (to reduce tension) or away from fan (to increase
tension). Ensure the blower shaft and the motor shaft are
parallel to each other (pulleys aligned). Tighten all bolts
when finished.
To replace the belt:
1. Use a belt with same section type or similar size. Do
not substitute a “FHP” type belt. When installing the
new belt, do not use a tool (screwdriver or pry--bar) to
force the belt over the pulley flanges, this will stress
the belt and cause a reduction in belt life.
2. Loosen the motor mounting plate front bolts and rear
bolts.
3. Push the motor and its mounting plate towards the
blower housing as close as possible to reduce the
center distance between fan shaft and motor shaft.
4. Remove the belt by gently lifting the old belt over one
of the pulleys.
5. Install the new belt by gently sliding the belt over both
pulleys and then sliding the motor and plate away
from the fan housing until proper tension is achieved.
6. Check the alignment of the pulleys, adjust if
necessary.
7. Tighten all bolts.
8. Check the tension after a few hours of runtime and
re--adjust as required.
Adjustable--Pitch Pulley on Motor
The motor pulley is an adjustable--pitch type that allows a
servicer to implement changes in the fan wheel speed to
match as--installed ductwork systems. The pulley consists
of a fixed flange side that faces the motor (secured to the
motor shaft) and a movable flange side that can be
rotated around the fixed flange side that increases or
reduces the pitch diameter of this driver pulley. (See Fig.
9.)
FIGURE 9
Supply Fan Pulley Adjustment
FIGURE 10
Tightening Locking Collar
Motor
As the pitch diameter is changed by adjusting the position
of the movable flange, the centerline on this pulley shifts
laterally (along the motor shaft). This creates a
requirement for a realignment of the pulleys after any
adjustment of the movable flange. Also reset the belt
tension after each realignment.
When replacing the motor, also replace the external--tooth
lock washer (star washer) under the motor mounting
base; this is part of the motor grounding system. Ensure
the teeth on the lock washer are in contact with the
motor’s painted base. Tighten motor mounting bolts to
120 +/-- 12 in--lbs.
Check the condition of the motor pulley for signs of wear.
Glazing of the belt contact surfaces and erosion on these
surfaces are signs of improper belt tension and/or belt
slippage. Pulley replacement may be necessary.
Changing fan wheel speed by changing pulleys: The
horsepower rating of the belt is primarily dictated by the
pitch diameter of the smaller pulley in the drive system
(typically the motor pulley in these units). Do not install a
replacement motor pulley with a smaller pitch diameter
than provided on the original factory pulley. Change fan
wheel speed by changing the fan pulley (larger pitch
diameter to reduce wheel speed, smaller pitch diameter to
increase wheel speed) or select a new system (both
pulleys and matching belt(s)).
To change fan speed:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting nuts.
(See Fig. 8.)
3. Loosen movable pulley flange setscrew. (See Fig. 9.)
4. Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed.
Increasing fan speed increases load on motor. Do not
exceed maximum speed specified.
5. Set movable flange at nearest keyway of pulley hub
and tighten setscrew to torque specifications.
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft. Make angular
alignment by loosening motor from mounting.
3. Tighten fan pulley setscrews and motor mounting
bolts to torque specifications.
4. Recheck belt tension.
Bearings
Before changing pulleys to increase fan wheel speed,
check the fan performance at the target speed and airflow
rate to determine new motor loading (bhp). Use the fan
performance tables or use the Packaged Rooftop Builder
software program. Confirm that the motor in this unit is
capable of operating at the new operating condition. Fan
shaft loading increases dramatically as wheel speed is
increased.
To reduce vibration, replace the motor’s adjustable pitch
pulley with a fixed pitch pulley (after the final airflow
balance adjustment). This will reduce the amount of
vibration generated by the motor/belt--drive system.
This fan system uses bearings featuring concentric split
locking collars. The collars are tightened through a cap
screw bridging the split portion of the collar. The cap
screw has a Torx T25 socket head. To tighten the locking
collar: Hold the locking collar tightly against the inner race
of the bearing and torque the cap screw to 65--70 in--lb
(7.4--7.9 Nm). See Fig. 10.
7
HEAT PUMP REFRIGERATION
SYSTEM
Surface loaded fibers must be completely removed prior
to using low velocity clean water rinse.
Periodic Clean Water Rinse
WARNING
A periodic clean water rinse is very beneficial for coils that
are applied in coastal or industrial environments.
However, it is very important that the water rinse is made
with very low velocity water stream to avoid damaging the
fin edges. Monthly cleaning as described below is
recommended.
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
This system uses R--410AR refrigerant which has
higher pressures than R--22 and other refrigerants.
No other refrigerant may be used in this system.
Gauge set, hoses, and recovery system must be
designed to handle R--410A refrigerant. If unsure
about
equipment,
consult
the
equipment
manufacturer.
Outdoor Coil
The RHS outdoor coil is fabricated with round tube copper
hairpins and plate fins of various materials and/or
coatings (see “Appendix I -- Model Number Significance”
to identify the materials provided in this unit). All unit sizes
use composite--type two--row coils. Composite two--row
coils are two single--row coils fabricated with a single
return bend end tubesheet.
Indoor Coil
The indoor coil is traditional round--tube, plate--fin
technology. Tube and fin construction is of various
optional materials and coatings (see Model Number
Format). Coils are multiple--row.
Outdoor Coil Maintenance and Cleaning
Recommendation
Routine cleaning of coil surfaces is essential to maintain
proper operation of the unit. Elimination of contamination
and removal of harmful residues will greatly increase the
life of the coil and extend the life of the unit. The following
maintenance and cleaning procedures are recommended
as part of the routine maintenance activities to extend the
life of the coil.
Remove Surface Loaded Fibers
Surface loaded fibers or dirt should be removed with a
vacuum cleaner. If a vacuum cleaner is not available, a
soft non--metallic bristle brush may be used. In either
case, the tool should be applied in the direction of the fins.
Coil surfaces can be easily damaged (fin edges can be
easily bent over and damage the coating of a protected
coil) if the tool is applied across the fins.
NOTE: Use of a water stream, such as a garden hose,
against a surface loaded coil will drive the fibers and dirt
into the coil. This will make cleaning efforts more difficult.
8
!
CAUTION
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this caution may result in personal
injury or equipment damage.
Only approved cleaning is recommended.
Routine Cleaning of Indoor Coil Surfaces
Periodic cleaning with environmentally sound coil cleaner
is essential to extend the life of coils. This cleaner is
available from our FAST parts as part number 1178704 for
a one gallon container, and part number 1178705 for a 5
gallon container. It is recommended that all coils,
including standard aluminum, pre--coated, copper/copper
or E--coated coils be cleaned with a environmentally
sound coil cleaner as described below. Coil cleaning
should be part of the unit’s regularly scheduled
maintenance procedures to ensure long life of the coil.
Failure to clean the coils may result in reduced durability
in the environment.
Avoid the use of
S
S
S
S
coil brighteners
acid cleaning prior to painting
high pressure washers
poor quality water for cleaning
Environmentally sound coil cleaner is nonflammable,
hypoallergenic, non bacterial, and a USDA accepted
biodegradable agent that will not harm the coil or
surrounding components such as electrical wiring, painted
metal surfaces, or insulation. Use of non--recommended
coil cleaners is strongly discouraged since coil and unit
durability could be affected.
Clean coil as follows:
1. Turn off unit power, tag disconnect.
2. Remove top panel screws on outdoor coil end of unit.
3. Remove coil corner post. See Fig. 11. To hold top
panel open, place coil corner post between top panel
and center post. See Fig. 12.
FIGURE 11
Cleaning Condener Coil (Size 036 -- 060 shown)
8. Reposition the outer coil section and remove the coil
corner post from between the top panel and center
post. Reinstall the coil corner post and replace all
screws.
Environmentally Sound Coil Cleaner Application
Equipment
S 2--1/2 gallon garden sprayer
S Water rinse with low velocity spray nozzle
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
corrosion and damage to the unit.
Harsh chemicals, household bleach or acid or
basic cleaners should not be used to clean
outdoor or indoor coils of any kind. These
cleaners can be very difficult to rinse out of the
coil and can accelerate corrosion at the fin/tube
interface where dissimilar materials are in contact.
If there is dirt below the surface of the coil, use a
environmentally sound coil cleaner
OUTDOOR
COIL
FIGURE 12
Propping Up Top Panel
!
4. For Sizes 036--072: Remove screws securing coil to
compressor plate and compressor access panel.
5. For Sizes 090--102: Remove fastener holding coil
sections together at return end of condenser coil.
Carefully separate the outdoor coil section 3 to 4 in.
from the inner coil section. See Fig. 13.
FIGURE 13
CAUTION
Separating Coil Sections
OUTDOOR
COIL
6. Use a water hose or other suitable equipment to flush
down between the 2 coil sections to remove dirt and
debris. Clean the outer surfaces with a stiff brush in
the normal manner.
7. Secure inner and outer coil rows together with a
field--supplied fastener.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in reduced
unit performance.
High velocity water from a pressure washer,
garden hose, or compressed air should never be
used to clean a coil. The force of the water or air
jet will bend the fin edges and increase airside
pressure drop.
Environmentally Sound Coil Cleaner Application
Instructions
1. Proper eye protection such as safety glasses is
recommended during mixing and application.
2. Remove all surface loaded fibers and dirt with a
vacuum cleaner as described above.
3. Thoroughly wet finned surfaces with clean water and
a low velocity garden hose, being carefull not to bend
fins.
4. Mix environmentally sound coil cleaner in a 2 1/2
gallon garden spryer according to the instructions
included with the cleaner. The optimum solution
temperature is 100°F (38°C).
NOTE: Do NOT USE water in excess of 130°F (54°C), as
the enzymatic activity will be destroyed.
5. Thoroughly apply environmentally sound coil cleaner
solution to all coil surfaces including finned area, tube
sheets and coil headers.
6. Hold garden sprayer nozzle close to finned areas and
apply cleaner with a vertical, up--and--down motion.
Avoid spraying in horizontal pattern to minimize
potential for fin damage.
7. Ensure cleaner thoroughly penetrates deep into
finned areas.
8. Interior and exterior finned areas must be thoroughly
cleaned.
9
9. Finned surfaces should remain wet with cleaning
solution for 10 minutes.
10. Ensure surfaces are not allowed to dry before rinsing.
Reapply cleaner as needed to ensure 10--minute
saturation is achieved.
11. Thoroghly rinse all surfaces with low velocity clean
water using downward rinsing motion of water spray
nozzle. Protect fins from damage from the spray
nozzle.
Refrigeration System Components
Each heat pump refrigeration system includes a
compressor, accumulator, reversing valve, dual--function
outdoor coil with vapor header check valve, cooling liquid
line with filter drier and check valve, dual--function indoor
coil with vapor header check valve, and heating liquid line
with check valve and strainer. Unit sizes 036--072 have a
single compressor--circuit; unit sizes 090 and 102 have
two compressor--circuits. See Fig. 14 for typical unit
piping schematic (unit size 102 (4--row indoor coil) with
two compressor--circuits is depicted).
Indoor Coil
Cleaning the Indoor Coil
1. Turn unit power off. Install lockout tag. Remove indoor
coil access panel.
2. If economizer or two--position damper is installed,
remove economizer by disconnecting Molex plug and
removing mounting screws.
3. Slide filters out of unit.
4. Clean coil using a commercial coil cleaner or
dishwasher detergent in a pressurized spray canister.
Wash both sides of coil and flush with clean water.
For best results, back--flush toward return--air section
to remove foreign material. Flush condensate pan
after completion.
5. Reinstall economizer and filters.
6. Reconnect wiring.
7. Replace access panels.
Dual--function outdoor and indoor coils are designed to
provide parallel coil circuits during evaporator--function
operation
and
converging
coil
circuits during
condenser--function operation.
Refrigerant flow metering in the evaporator--function
sequence is provided by multiple fixed--bore metering
devices that are located in the tee nipples between the
liquid header and the entrance to each coil circuit. The
Thel metering device is swaged into the nipple tube
between the liquid header end and the side--port tube.
See Fig. 15. During evaporator--function operation, flow is
straight through the nipple and into each evaporator
circuit. Flow continues through the parallel evaporator
circuits and into the vapor header.
Typical Unit Piping Schematic (102 unit with 4--row indoor coil)
FIGURE 14
LPS/LOC
Filter
Drier
2B
Cooling Liquid Lines
1B
Acutrol
DFT 1
Acutrol
1A
DFT 2
COMPRESSOR
ACCUMULATOR
2D
HPS
Comp 2
1D
COMPRESSOR
ACCUMULATOR
2A
Outdoor Coil
Heating Mode Liquid Lines
HPS
Indoor Coil
Comp 1
2C
1C
10
Strainer
FIGURE 15
Heat Pump -- Flow as Evaporator Function
FIGURE 17
Heat Pump -- Flow as Condenser Function/
Entering Second Pass
To
Evaporator
Coil
Circuits
To
Condensing
Circuit
Metering
Orifice
From
Transfer
Header
From
Liquid
Header
Converging circuit flow in the condenser--function
operation is accomplished with the check valve in the
vapor header and the liquid transfer header connected to
the side ports on all but one of the tee nipples in each
circuit. During condenser--function operation, hot gas from
the compressor discharge enters the header until it
reaches the check valve which blocks further flow. The
hot gas exits the header through the tubes above the
check valve and enters these coil circuits. At the outlet of
these desuperheating and condensing circuits, the
refrigerant enters the tees from the coil end. The
refrigerant exits the tee at the side port and enters the
liquid transfer header (see Fig. 16). The refrigerant moves
through the liquid transfer header and exits through the
remaining tubes, through the side ports on the tees (see
Fig. 17) and back into the coil circuits where additional
condensing occurs. These circuits exit into the vapor
header behind the check valve and exit through the
remaining tube on the vapor header. In this last pass
through the coil, the refrigerant is subcooled. Subcooled
liquid exits at the last tee (see Fig. 18) where the side port
is connected to the specific mode liquid line.
FIGURE 16
Heat Pump -- Flow as Condenser Function/
Exiting First Pass
From
Condenser
Coil Circuits
To
Transfer
Header
FIGURE 18
Heat Pump -- Flow as Condenser Function/
Exiting Subcooler Pass
DFT Location
(Outdoor Coils only)
From
Subcooler
Circuit
To
Liquid
Line
Each liquid line has a check valve to prevent backflow
through the liquid line in its opposite mode. This ensures
correct flow direction through filter driers and strainers
and prevents emptying of off--mode liquid lines into
evaporator--function coil circuits.
Reversing Valve and Check Valve Position
See Fig. 14 on page 10.
Table 3 – Cooling Mode (each circuit)
Component
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Status/Position
Energized
Closed
Open
Closed
Open
Table 4 – Heating Mode (each circuit)
Component
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Status/Position
De--energized
Open
Closed
Open
Closed
11
start the circuit in a Cooling Mode (jumper R to Y1 or Y2)
and observe the frosting pattern on the face of the indoor
coil. A frost pattern should develop uniformly across the
face of the indoor coil starting at each tube at the nipple
locations.
Table 5 – Defrost Mode
RHS036---102 / Circuit 2
Component
Defrost Thermostat
Outdoor Fan(s)
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Status/Position
Closed
Off
Energized
Closed
Open
Closed
Open
To check the outdoor coil, disconnect the outdoor fan
motor. Start the circuit in a Heating Mode (jumper R to W1
or W2) and observe the frost pattern on the face of the
outdoor coil.
Failure to develop frost at an outlet tube can indicate a
plugged or a missing orifice.
Refrigerant System Pressure Access Ports
Troubleshooting Refrigerant Pressure Problems
and Check Valves
Refer to Fig. 14, on page 10, and the Cooling Mode and
Heating Mode tables (Tables 3 and 4) on page 11.
Coil Metering Devices
The metering devices are multiple fixed–bore devices
swaged into the horizontal outlet tubes from the liquid
header, located at the entrance to each evaporator coil
circuit path. These are non–adjustable. Service requires
replacing the entire liquid header assembly.
Check for possible blockage of one or more of these
metering devices by creating a low load condition on the
evaporator--function coil and then observing the frosting
pattern on the finned portion of the coil.
To check the indoor coil, disconnect the supply fan signal
(036--072 direct--drive fans) or contactor (IFC) coil, then
FIGURE 19
There are two access ports in each circuit -- on the
suction tube near the compressor and on the discharge
tube near the compressor. These are brass fittings with
black plastic caps. The hose connection fittings are
standard 1/4 SAE Male Flare couplings.
The brass fittings are two--piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring--closed check valve core screwed into the base.
(See Fig. 19.) This check valve is permanently assembled
into this core body and cannot be serviced separately;
replace the entire core body if necessary. Service tools
are available that allow the replacement of the check
valve core without having to recover the entire system
refrigerant charge. Apply compressor refrigerant oil to the
check valve core’s bottom o--ring. Install the fitting body
with 96 +/--10 in--lbs of torque; do not overtighten.
CoreMax Access Port Assembly
SEAT
CORE
(Part No. EC39EZ067)
1/2-20 UNF RH
0.596
45°
30°
WASHER
O-RING
5/8” HEX
.47
1/2" HEX
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
12
DEPRESSOR PER ARI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
R--410A REFRIGERANT
This unit is designed for use with R--410A refrigerant. Do
not use any other refrigerant in this system.
R--410A refrigerant is provided in pink (rose) colored
cylinders. These cylinders are available with and without
dip tubes; cylinders with dip tubes will have a label
indicating this feature. For a cylinder with a dip tube, place
the cylinder in the upright position (access valve at the
top) when removing liquid refrigerant for charging. For a
cylinder without a dip tube, invert the cylinder (access
valve on the bottom) when removing liquid refrigerant.
Because R--410A refrigerant is a blend, it is strongly
recommended that refrigerant always be removed from
the cylinder as a liquid. Admit liquid refrigerant into the
system in the discharge line. If adding refrigerant into the
suction line, use a commercial metering/expansion device
at the gauge manifold; remove liquid from the cylinder,
pass it through the metering device at the gauge set and
then pass it into the suction line as a vapor. Do not
remove R--410A refrigerant from the cylinder as a vapor.
Refrigerant Charge
Amount of refrigerant charge is listed on the unit’s
nameplate. Refer to the GTAC2--5 Charging, Recovery,
Recycling and Reclamation training manual and the
following procedures.
Unit panels must be in place when unit is operating during
the charging procedure. If unit is equipped with a head
pressure control device, bypass it to ensure full fan
operation during charging.
Charge checking and adjustments must be made while
the system is operating in Cooling only.
No Charge
Use standard evacuation techniques for R--410A
refrigerant. After evacuating system, weigh in the
specified amount of refrigerant.
Low--Charge Cooling
Using Cooling Charging Charts, Fig. 20 vary refrigerant
until the conditions of the appropriate chart are met. Note
the charging charts are different from type normally used.
Charts are based on charging the units to the correct
superheat for the various operating conditions. Accurate
pressure gauge and temperature sensing device are
required. Connect the pressure gauge to the service port
on the suction line. Mount the temperature sensing device
on the suction line and insulate it so that outdoor ambient
temperature does not affect the reading. Indoor--air cfm
must be within the normal operating range of the unit.
SIZE DESIGNATION
036
048
060
072
090
102
NOMINAL TONS
REFERENCE
3
4
5
6
7.5
8.5
EXAMPLE:
Model RHS036
Outdoor Temperature . . . . . . . . . . . 85_F (29_C)
Suction Pressure . . . . . . . . . 140 psig (965 kPa)
Suction Temperature should be . . 55_F (13_C)
Compressors
Lubrication
Compressors are charged with the correct amount of oil at
the factory.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage
to components.
The compressor is in a R--410A refrigerant system
and uses a polyolester (POE) oil. This oil is
extremely hygroscopic, meaning it absorbs water
readily. POE oils can absorb 15 times as much
water as other oils designed for HCFC and CFC
refrigerants. Avoid exposure of the oil to the
atmosphere.
Replacing Compressor
The compressor used with R--410A refrigerant contains a
POE oil. This oil has a high affinity for moisture. Do not
remove the compressor’s tube plugs until ready to insert
the unit suction and discharge tube ends.
Compressor mounting bolt torque is 65--75 in--lbs (7.3--8.5
Nm).
To Use Cooling Charging Charts
Take the outdoor ambient temperature and read the
suction pressure gauge. Refer to chart to determine what
suction temperature should be. If suction temperature is
high, add refrigerant. If suction temperature is low,
carefully recover some of the charge. Recheck the suction
pressure as charge is adjusted.
13
COOLING CHARGING CHARTS
FIGURE 20
Cooling Charging Charts
RHS036
RHS048
14
Figure 20 (cont.)
Cooling Charging Charts
RHS060
RHS072
15
Figure 20 (cont.)
Cooling Charging Charts
RHS090
RHS102
16
Compressor Rotation
!
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution may result in
personal injury.
On 3--phase units with scroll compressors, it is important
to be certain compressor is rotating in the proper
direction. To determine whether or not compressor is
rotating in the proper direction:
1. Connect service gauges to suction and discharge
pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start--up.
NOTE: If the suction pressure does not drop and the
discharge pressure does not rise to normal levels:
4. Note that the evaporator fan is probably also rotating
in the wrong direction.
5. Turn off power to the unit.
6. Reverse any two of the unit power leads.
7. Reapply power to the compressor.
Outdoor Fan Location
See Fig. 21.
1. Shut off unit power supply. Install lockout tag.
2. Remove condenser--fan assembly (grille, motor, and
fan).
3. Loosen fan hub setscrews.
4. Adjust fan height as shown in Fig. 21.
5. Tighten setscrews to 84 in--lbs (9.5 Nm).
6. Replace condenser--fan assembly.
FIGURE 21
Outdoor Fan Adjustment
Conduit
0.14 in + 0.0 / -0.03
Troubleshooting Cooling System
Refer to Table 6 for additional troubleshooting topics.
The suction and discharge pressure levels should now
move to their normal start--up levels.
NOTE: When the compressor is rotating in the wrong
direction, the unit makes an elevated level of noise and
does not provide cooling.
Filter Drier
Replace whenever refrigerant system is exposed to
atmosphere. Only use factory specified liquid--line filter
driers with working pressures no less than 650 psig. Do
not install a suction--line filter drier in liquid line. A
liquid--line filter drier designed for use with R--410A
refrigerant is required on every unit.
17
Table 6 – Heating and Cooling Troubleshooting
PROBLEM
Compressor and
Outdoor Fan
Will Not Start.
CAUSE
REMEDY
Power failure.
Call power company.
Fuse blown or circuit breaker tripped.
Replace fuse or reset circuit breaker. Determine root cause.
Defective thermostat, contactor, transformer,
control relay, or capacitor.
Replace component.
Insufficient line voltage.
Determine cause and correct.
Incorrect or faulty wiring.
Check wiring diagram and rewire correctly.
Thermostat setting too high.
Lower thermostat setting below room temperature.
High pressure switch tripped.
See problem ‘‘Excessive head pressure.’’
Low pressure switch tripped.
Check system for leaks. Repair as necessary.
Freeze-up protection thermostat tripped.
See problem ‘‘Suction pressure too low.’’
Faulty wiring or loose connections in compressor
circuit.
Check wiring and repair or replace.
Compressor motor burned out, seized, or
internal overload open.
Determine cause. Replace compressor or allow enough time for
internal overload to cool and reset.
Defective run/start capacitor, overload, start
relay.
Determine cause and replace compressor.
One leg of 3-phase power dead.
Replace fuse or reset circuit breaker. Determine cause.
Refrigerant overcharge or undercharge.
Recover refrigerant, evacuate system, and recharge to nameplate.
Defective compressor.
Replace and determine cause.
Insufficient line voltage.
Determine cause and correct.
Blocked outdoor coil or dirty air filter.
Determine cause and correct.
Defective run/start capacitor, overload, or start
relay.
Determine cause and replace.
Defective thermostat.
Replace thermostat.
Faulty outdoor-fan (cooling) or indoor-fan
(heating) motor or capacitor.
Replace.
Restriction in refrigerant system.
Locate restriction and remove.
Dirty air filter.
Replace filter.
Unit undersized for load.
Decrease load or increase unit size.
Thermostat set too low (cooling).
Reset thermostat.
Low refrigerant charge.
Locate leak; repair and recharge.
Air in system.
Recover refrigerant, evacuate system, and recharge.
Outdoor coil dirty or restricted.
Clean coil or remove restriction.
Compressor Makes
Excessive Noise.
Compressor rotating in the wrong direction.
Reverse the 3-phase power leads as described in
Start-Up.
Excessive Head
Pressure.
Dirty outside air or return air filter (heating).
Replace filter.
Dirty outdoor coil (cooling).
Clean coil.
Refrigerant overcharged.
Recover excess refrigerant.
Air in system.
Recover refrigerant, evacuate system, and recharge.
Condensing air restricted or air short-cycling.
Determine cause and correct.
Low refrigerant charge.
Check for leaks; repair and recharge.
Compressor scroll plates defective.
Replace compressor.
Restriction in liquid tube.
Remove restriction.
High heat load.
Check for source and eliminate.
Compressor scroll plates defective.
Replace compressor.
Refrigerant overcharged.
Recover excess refrigerant.
Dirty air filter (cooling).
Replace filter.
Dirty or heavily iced outdoor coil (heating).
Clean outdoor coil. Check defrost cycle operation.
Low refrigerant charge.
Check for leaks; repair and recharge.
Metering device or low side restricted.
Remove source of restriction.
Insufficient indoor airflow (cooling mode).
Increase air quantity. Check filter and replace if necessary.
Temperature too low in conditioned area.
Reset thermostat.
Field-installed filter drier restricted.
Replace.
Outdoor ambient below 25_F (cooling).
Install low-ambient kit.
Outdoor fan motor(s) not operating (heating).
Check fan motor operation.
Compressor Will Not
Start But Outdoor
Fan Runs.
Compressor Cycles
(Other Than
Normally Satisfying
Thermostat).
Compressor Operates
Continuously.
Head Pressure
Too Low.
Excessive Suction
Pressure.
Suction Pressure
Too Low.
18
CONVENIENCE OUTLETS
!
Mount the weatherproof cover to the backing plate as
shown in Fig. 23. Remove two slot fillers in the bottom of
the cover to permit service tool cords to exit the cover.
Check for full closing and latching.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in
personal injury or death.
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet
for power status before opening unit for service.
Locate its disconnect switch, if appropriate, and
open it. Tag--out this switch, if necessary.
FIGURE 23
Weatherproof Cover Installation
COVER – WHILE-IN-USE
WEATHERPROOF
RECEPTACLE
NOT INCLUDED
Non--powered convenience outlets are offered on RHS
models: They provide a 125--volt GFCI (ground--fault
circuit--interrupter) duplex receptacle rated at 15--A behind
a hinged waterproof access cover, located on the end
panel of the unit. See Fig. 22.
FIGURE 22
BASE PLATE FOR
GFCI RECEPTACLE
Convenient Outlet Location
Non--powered Convenient Outlet: This type requires the
field installation of a general--purpose 125--volt 15--A
circuit powered from a source elsewhere in the building.
Observe national and local codes when selecting wire
size, fuse or breaker requirements and disconnect switch
size and location. Route 125--v power supply conductors
into the bottom of the utility box containing the duplex
receptacle.
Convenience
Outlet
GFCI
Maintenance: Periodically test the GFCI receptacle by
pressing the TEST button on the face of the receptacle.
This should cause the internal circuit of the receptacle to
trip and open the receptacle. Check for proper grounding
wires and power line phasing if the GFCI receptacle does
not trip as required. Press the RESET button to clear the
tripped condition.
Control Box
Access Panel
Installing Weatherproof Cover –
A weatherproof while-in-use cover for the factory-installed
convenience outlets is now required by UL standards.
This cover cannot be factory-mounted due its depth; it
must be installed at unit installation. For shipment, the
convenience outlet is covered with a blank cover plate.
The weatherproof cover kit is shipped in the unit’s control
box. The kit includes the hinged cover, a backing plate
and gasket.
DISCONNECT
ALL
POWER
CONVENIENCE OUTLET.
TO
UNIT
AND
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately 1/2-in (13 mm) under screw heads are
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
Using unit--mounted convenience outlets: Units with
unit--mounted convenience outlet circuits will often require
that two disconnects be opened to de--energize all power
to the unit. Treat all units as electrically energized until the
convenience outlet power is also checked and
de--energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
HEAT PUMP CONTROLS
Controls Terminal Board
The Controls Terminal Board (CTB) is a large printed
circuit board that is located in the center of the unit control
box. This printed circuit board contains multiple
termination strips and connectors to simplify factory
control box wiring and field control connections. Terminals
are clearly marked on the board surface. See Fig 24.
The CTB contains no software and no logic. But it does
include seven configuration jumpers that are cut to
19
configure the board to read external optional and
accessory controls, including that the unit is a heat pump.
Controls Terminal Board (CTB)
FIGURE 24
High Pressure Switch
The system is provided with a high pressure switch
mounted on the discharge line. The switch is
stem--mounted and brazed into the discharge tube. Trip
setting is 630 psig +/-- 10 psig (4344 +/-- 69 kPa) when
hot. Reset is automatic at 505 psig (3482 kPa).
Loss of Charge Switch
The system is protected against a loss of charge and low
evaporator coil loading condition by a loss of charge
switch located on the liquid line and a freeze protection
thermostat on the indoor coil. The switch is
stem--mounted. Loss of Charge Switch trip setting is
27 psig +/-- 3 psig (186 +/-- 21 kPa). Reset is automatic at
44 +/-- 3 psig (303 +/-- 21 kPa).
Freeze Protection Thermostat trip setting is 30_F +/-- 5_F
(--1_C +/-- 3_C). Reset is automatic at 45_F +/-- 5_F (7_C
+/--3_C).
Supply (Indoor) Fan Motor Protection
Disconnect and lockout power when servicing fan motor.
2.9 and 3.7 bhp motors are equipped with an
overtemperature or protection device. The type of device
depends on the motor size. See Table 8.
Table 8 – Overload Device per Motor Size
Table 7 – Jumper Configuration
Jumper
JMP1
JMP2
JMP3
JMP4
JMP5
JMP6
JMP7
Control Function
Phase Monitor
Occupancy Control
Smoke Detector Shutdown
Remote Shutdown
Heat Pump / Reheat
Heat Pump / Reheat
Heat Pump / Reheat
Note
RHS default: Cut
RHS default: Cut
RHS default: Cut
Jumpers JMP5, JMP6 and JMP7 are located in notches
across the top of the CTB (see Fig. 24 ). These jumpers
are factory cut on all heat pump units. Visually check
these jumpers to confirm that they have been cut.
PROTECTIVE CONTROLS
Compressor Protection
Overcurrent
The compressor has internal linebreak motor protection.
Overtemperature
The compressor has an internal protector to protect it
against excessively high discharge gas temperatures.
20
Motor Size (bhp)
Overload Device
Reset
1.7
Internal Linebreak
Automatic
2.4
Internal Linebreak
Automatic
2.9
Thermix
Automatic
3.7
Thermix
Automatic
4.7
External
(Circuit Breaker)
Manual
The High Static option supply fan motor is equipped with
a pilot--circuit Thermix combination overtemperature/
overcurrent protection device. This device resets
automatically. Do not bypass this switch to correct trouble.
Determine the cause and correct it.
The Thermix device is a snap--action overtemperature
protection device that is imbedded in the motor windings.
It is a pilot--circuit device that is wired into the unit’s 24–v
control circuit. When this switch reaches its trip setpoint, it
opens the 24–v control circuit and causes all unit
operation to cease. This device resets automatically when
the motor windings cool. Do not bypass this switch to
correct trouble. Determine the cause and correct it.
The
External
motor
overload
device
is
a
specially--calibrated circuit breaker that is UL recognized
as a motor overload controller. It is an overcurrent device.
When the motor current exceeds the circuit breaker
setpoint, the device opens all motor power leads and the
motor shuts down. Reset requires a manual reset at the
overload switch. This device (designated IFCB) is located
on the side of the supply fan housing, behind the fan
access panel.
Troubleshooting supply fan motor overload trips: The
supply fan used in RHS units is a forward--curved
centrifugal wheel. At a constant wheel speed, this wheel
had a characteristic that causes the fan shaft load to
DECREASE when the static pressure in the unit--duct
system increases and to INCREASE when the static
pressure in the unit--duct system decreases (and fan
airflow rate increases). Motor overload conditions typically
develop when the unit is operated with an access panel
removed, with unfinished
duct work,
in an
economizer--open mode, or a leak develops in the duct
system that allows a bypass back to unit return opening.
FIGURE 25
Defrost Control Board (DFB) Arrangement
Outdoor Fan Motor Protection
The outdoor fan motor is internally protected against
overtemperature.
Control Circuit, 24--V
The control circuit is protected against overcurrent
conditions by a circuit breaker mounted on control
transformer TRAN. Reset is manual.
COMMERCIAL DEFROST CONTROL
The Commercial Defrost Control Board (DFB) coordinates
thermostat demands for supply fan control, 1 or 2 stage
cooling, 2 stage heating, emergency heating and defrost
control with unit operating sequences. The DFB also
provides an indoor fan off delay feature (user selectable).
See Fig. 25 for board arrangement.
FIGURE 26
DIP
Switches
Speed-Up
Jumpers
The DFB is located in the RHS’s main control box (see
Fig. 26). All connections are factory--made through
harnesses to the unit’s CTB, to IFC (belt--drive motor) or
to ECM (direct--drive motor), reversing valve solenoids
and to defrost thermostats. Refer to Table 9 for details of
DFB Inputs and Outputs. Detailed unit operating
sequences are provided in the Operating Sequences
section starting on page 62.
Defrost Control Board (DFB) Location
21
Table 9 – RHS Defrost Board I/O and Jumper Configurations
Inputs
Point Name
G Fan
Y1 Cool 1
Y2 Cool 2
W1 Heat 1
W2 Heat 2
R Power
C Common
DFT1
DFT 2
Type of I/O
DI, 24---vac
DI, 24---vac
DI, 24---vac
DI, 24---vac
DI, 24---vac
24---vac
24---vac
DI, 24---vac
DI, 24---vac
Connection Pin Number
P2---3
P2---5
P2---4
P2---7
P2---6
P3---1
P3---2
DFT---1 to DFT---1
DFT---2 to DFT---2
Unit Connection
LCTB---G
LCTB---Y1
LCTB---Y2
LCTB---W1
LCTB---W2
CONTL BRD---8
CONTL BRD---4
Note
Type of I/O
DO, 24---vac
DO, 24---vac
DO, 24---vac
DO, 24---vac
DO, 24---vac
DO, 24---vac
DO, 24---vac
24---vac
Connection Pin Number
P3---9
OF
P3---7 to P3---5
P3---6 to P3---4
P3---10
P3---8
E---HEAT
P3---3
Unit Connection
REHEAT---2
OFR
Note
Type of I/O
24---vac
24---vac
Connection Pin Number
P1---1
P1---3
Unit Connection
Connection Pin Number
JMP17
JMP18
Unit Connection
Outputs
Point Name
IFO Fan On
OF OD Fan On
RVS1
RVS2
COMP 1
COMP 2
HEAT 2
COM
Energize in COOL
Energize in COOL
FPT --- REHEAT---6
REHEAT---8
HC---1 (TB4---1)
HC---1 (TB4---3)
Configuration
Point Name
Select Jumper
2 Compressor
Note
Use for RHS***D
Speed--Up Configuration
Point Name
Speed---Up Jumper
Speed---Up Jumper
Type of I/O
Jumper for 1--3 secs: Factory Test, defrost runs for 9 secs
Jumper for 5--20 secs: Forced Defrost, defrost runs for 30
secs if DFT2 is open
Reversing valve control — The DFB has two outputs for
unit reversing valve control. Operation of the reversing
valves is based on internal logic; this application does not
use an “O” or “B” signal to determine reversing valve
position. Reversing valves are energized during the
Cooling stages and de--energized during Heating cycles.
Once energized at the start of a Cooling stage, the
reversing valve will remain energized until the next
Heating cycle demand is received. Once de--energized at
the start of a Heating cycle, the reversing valves will
remain de--energized until the next Cooling stage is
initiated.
Compressor control — The DFB receives inputs indicating
Stage 1 Cooling, Stage 2 Cooling (sizes 090 and 102
only) and Stage 1 Heating from the space thermostat; it
generates commands to start compressors with or without
reversing valve operation to produce Stage 1 Cooling
(one compressor), Stage 2 Cooling (both compressors
run) or Stage 1 Heating (both compressors run).
22
Note
Auxiliary (Electric) Heat control — The RHS unit can be
equipped with one or two auxiliary electric heaters, to
provide a second stage of Heating. The DFB will energize
this Heating system for a Stage 2 Heating command
(heaters operate concurrently with both compressors in
the Stage 2 Heating cycle), for an Emergency Heating
sequence (compressors are off and only the electric
heaters are energized) and also during the Defrost cycle
(to eliminate a “cold blow” condition in the space).
Defrost — The defrost control mode is a time/temperature
sequence. There are two time components: The
continuous run period and the test/defrost cycle period.
The temperature component is provided by the defrost
thermostat(s) (DFT1 and DFT2 (090--102 only) mounted
on the outdoor coil.
The continuous run period is a fixed time period between
the end of the last defrost cycle (or start of the current
Heating cycle) during which no defrost will be permitted.
This period can be set at 30, 60, 90 or 120 minutes by
changing the positions of DIP switches SW1 and SW2
(see Fig. 27 and Table 10). The default run periods are 30
minutes for unit sizes 036--072 and 90 minutes for unit
sizes 090--102.
FIGURE 27
If the space heating load is satisfied and compressor
operation is terminated, the defrost control will remember
where the run period was interrupted. On restart in
Heating, the defrost control will resume unit operation at
the point in the run period where it was last operating.
DIP Switch Settings -- Defrost Board
Defrost Thermostats — These are temperature switches
that monitor the surface temperature of the outdoor coil
circuits. These switches are mounted on the liquid tube
exiting the outdoor coil heating circuits. These switches
close on temperature drop at 30_F (--1_C) and reset open
on temperature rise at 80_F (27_C).
At the end of the continuous run period, the defrost
control will test for a need to defrost. On unit sizes
036--072 (single compressor designs), DFT1 controls the
start and termination of the defrost cycle. If DFT1 is still
open, the defrost test/run window is closed and the
control repeats the continuous run period. If DFT1 is
closed, the defrost cycle is initiated. The defrost period
will end when DFT1 opens (indicating the outdoor coil has
been cleared of frost and ice) or a 10 minute elapsed
period expires, whichever comes first.
On unit sizes 090--102 (two circuit designs), DFT2
(located on the bottom circuit of the outdoor coil) controls
the start and termination of the defrost cycle. If DFT2 is
still open, the defrost test/run window is closed and the
control repeats the continuous run period. If DFT2 is
closed, the defrost cycle is initiated in Circuit 2. The
defrost period will end when DFT2 opens (indicating the
outdoor coil has been cleared of frost and ice) or a 10
minute elapsed period expires, whichever comes first.
On sizes 090--102, Circuit 1’s defrost thermostat DFT1
(located on the upper circuit of the outdoor coil) cannot
initiate a unit defrost cycle; only DFT2 may do this. But
once Circuit 2 is in defrost, the DFB will monitor the status
of DFT1. If DFT1 closes during a Circuit 2 defrost cycle,
Circuit 1 will also enter a defrost cycle. Circuit 1’s defrost
cycle will end when DFT1 opens (indicating the upper
portion of the outdoor coil is cleared of frost and ice) or
the Circuit 2 defrost cycle is terminated.
Indoor Fan Off Delay — The DFB can provide a 30 sec
delay on Indoor Fan Off if the thermostat’s fan selector
switch is set on AUTO control. DIP Switch SW3 on the
DFB selects use of the fan off time delay feature. Setting
SW3 in the OPEN position turns the Fan Off Delay feature
on; setting SW3 in the CLOSED position disables this
feature. The delay period begins when Y1 demand or W1
demand by the space thermostat is removed.
Defrost Speedup Functions — The DFB permits the
servicer to speed--up the defrost cycle. There are two
speed--up sequences: relative speed--up and an
immediate forced defrost. Speed--up sequences are
initiated by shorting jumper wires JMP17 and JMP18
together (see Fig. 25); use a straight--edge screwdriver.
Shorting the jumpers for a period of 1 to 3 secs reduces
the defrost timer periods by a factor of 0.1 sec/minute.
(For example, the 90 min run period is reduced to 9 secs.)
The DFB will step the unit through a Heating cycle and a
Defrost cycle using these reduced time periods. This
mode ends after the Defrost cycle.
Shorting the jumpers for a period of 5 to 20 secs
bypasses the remaining continuous run period and places
the unit in a Forced Defrost mode. If the controlling DFT is
closed when this mode is initiated, the unit will complete a
normal defrost period that will terminate when the
controlling DFT opens or the 10 minute defrost cycle limit
is reached. If the controlling DFT is open when this mode
is initiated, the Defrost cycle will run for 30 secs. Both
modes end at the end of the Defrost cycle.
At the end of the unit defrost cycle, the unit will be
returned to Heating cycle for a full continuous run period.
Switch No.
1
Table 10 – Dip Switch Position
2
1
0
1
1
J
90 minutes
J
0
2
J
J
60 minutes
1
1
2
1
J
0
J
30 minutes
1
2
J
J
0
3
1
0
120 minutes
On
J
Off
Fan Delay
23
ELECTRIC HEATERS
NOTE: The value in position 9 of the part number differs
between the sales package part number (value is 1) and a
bare heater model number (value is 0).
RHS units may be equipped with field--installed accessory
electric heaters. The heaters are modular in design, with
heater frames holding open coil resistance wires strung
through ceramic insulators, line--break limit switches and
a control contactor. One or two heater modules may be
used in a unit.
FIGURE 28
FIGURE 29
DISCONNECT
MOUNTING
LOCATION
Typical Component Locatin (3--6 Ton)
EMT OR RIGID CONDUIT SINGLE
(FIELD-SUPPLIED)
POINT BOX
CENTER MANUAL RESET
POST
LIMIT SWITCH
HEATER
COVERS
Typical Access Panel Locatin (3--6 Ton)
DISCONNECT MOUNTING
LOCATION
SINGLE POINT
MAIN
BRACKET AND BOX
HEATER
HEATER
HEATER
CONTROL CONDUIT
MOUNTING
MODULE
MODULE
MOUNTING
BOX
DRIP BOOT
SCREW
(LOCATION 1) (LOCATION 2) BRACKET
CONTROL WIRE TERMINAL BLOCK
FIGURE 30
UNIT BLOCK-OFF
PANEL
Typical Module Insulation
INDOOR
ACCESS
PANEL
OUTDOOR
ACCESS PANEL
Heater modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 28, Fig. 29 and Fig. 30.
Not all available heater modules may be used in every
unit. Use only those heater modules that are UL listed for
use in a specific size unit. Refer to the label on the unit
cabinet re approved heaters.
TRACK
FLANGE
Unit heaters are marked with Heater Model Numbers. But
heaters are ordered as and shipped in cartons marked
with a corresponding heater Sales Package part number.
See Table 11 for correlation between heater Model
Number and Sales Package part number.
Table 11 – Heater Model Number
Bare Heater Model Number
Heater Sales Package PNO
Includes:
Bare Heater
Carton and packing materials
Installation sheet
C
R
H
E
A
T
E
R
0
0
1
A
0
0
C
R
H
E
A
T
E
R
1
0
1
A
0
0
Single Point Boxes and Supplementary Fuses —
When the unit MOCP device value exceeds 60--A,
unit--mounted supplementary fuses are required for each
heater circuit. These fuses are included in accessory
Single Point Boxes, with power distribution and fuse
24
blocks. The single point box will be installed directly under
the unit control box, just to the left of the partition
separating the indoor section (with electric heaters) from
the outdoor section. The Single Point Box has a hinged
access cover. See Fig. 31.
FIGURE 31
21
11
23
13
CONTROL
BOX
Typical Single Point Insulation
Typical Location of Heater Limit Switches
(3--Phase heater shown)
FIGURE 32
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
Line-Break
Limit Switches
23
11
POWER
WIRES
13
ALLIED PA
21
23
11
13
FOAM
BUSHING
21
DRIP BOOT
BRACKET
MOUNTING
SCREWS
MODEL NO.
ALLIED PA
CORP.
MODEL NO.
OD
OD
ERIAL NO.
ERIAL NO.
22.2
ISTED AIR
NDITIONING
UIP ACCESS
346N
23
.
P/N
2-
1
3
5610-4
REV
HEATER
RELAYS
ISTED AIR
NDITIONING
UIP ACCESS
346N.
23
P/N
2-
1
3
5610-4
REV
HEATER
MOUNTING
SCREWS
On RHS units, all fuses are 60--A. Single point boxes
containing fuses for 208/230--V applications use UL Class
RK5 250--V fuses (Bussman FRNR 60 or Shawmut TR
60R). Single point boxes for 460--V and 575--V
applications use UL Class T 600--V fuses (Bussman JJS
60 or Shawmut A6T 60). (Note that all heaters are
qualified for use with a 60--A fuse, regardless of actual
heater ampacity, so only 60--A fuses are necessary.)
Unit heater applications not requiring supplemental fuses
require a special Single Point Box without any fuses.
Connect power supply conductors to heater conductors
and field--supplied base unit power tap leads (see text
below re: “Completing Heater Installation”) inside the
empty Single Point Box using UL--approved connectors.
Safety Devices — Electric heater applications use a
combination of line--break/auto--reset limit switches and a
pilot--circuit/manual reset limit switch to protect the unit
against over--temperature situations.
Line--break/auto--reset limit switches are mounted on the
base plate of each heater module. See Fig. 32. These are
accessed through the indoor access panel. Remove the
switch by removing two screws into the base plate and
extracting the existing switch.
Pilot--circuit/manual reset limit switch is located in the side
plate of the indoor (supply) fan housing. See Fig. 29.
Completing Heater Installation
Field Power Connections — Tap conductors must be
installed between the base unit’s field power connection
lugs and the Single Point Box (with or without fuses).
Refer to unit wiring schematic. Use copper wire only. For
connection using the Single Point Box less fuses, connect
the field power supply conductors to the heater power
leads and the field--supplied tap conductors inside the
Single Point Box. Use UL--approved pressure connectors
(field--supplied) for these splice joints.
Low--Voltage Control Connections — Pull the
low--voltage control leads from the heater module(s) -VIO and BRN (two of each if two modules are installed;
identify for Module #1) -- to the 4--pole terminal board TB4
located on the heater bulkhead to the left of Heater #1.
Connect the VIO lead from Heater #1 to terminal TB4--1.
Connect the VIO lead from Heater #2 to terminal TB4--2.
Connect both BRN leads to terminal TB4--3. See Fig. 33.
FIGURE 33
Accessory Electric Heater Control Connections
DEFROST
BOARD
E-HEAT
ORN
P3-3
BRN
TB4
ORN
BRN
1
3
VIO
BRN BRN
VIO
Field
Connections
Elec Htr
VIO HR2
BRN
HR1
BRN
VIO
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
25
SMOKE DETECTORS
Smoke detectors are available as factory--installed
options on RHS models. Smoke detectors may be
specified for Supply Air only without or with economizer.
All
components
necessary
for
operation
are
factory--provided
and
mounted.
The
unit
is
factory--configured for immediate smoke detector
shutdown operation; additional wiring or modifications to
unit terminal board may be necessary to complete the unit
and smoke detector configuration to meet project
requirements.
System
The smoke detector system consists of a four--wire
controller and one or two sensors. Its primary function is
to shut down the rooftop unit in order to prevent smoke
from circulating throughout the building. It is not to be
used as a life saving device.
inlet and an exhaust tube. The sampling tube (when used)
and exhaust tube are attached during installation. The
sampling tube varies in length depending on the size of
the rooftop unit. The clear plastic cover permits visual
inspections without having to disassemble the sensor.
The cover attaches to the sensor housing using four
captive screws and forms an airtight chamber around the
sensing electronics. Each sensor includes a harness with
an RJ45 terminal for connecting to the controller. Each
sensor has four LEDs (for Power, Trouble, Alarm and
Dirty) and a manual test/reset button (on the left--side of
the housing).
FIGURE 35
Smoke Detector Sensor
Controller
The controller (see Fig. 34) includes a controller housing,
a printed circuit board, and a clear plastic cover. The
controller can be connected to one or two compatible duct
smoke sensors. The clear plastic cover is secured to the
housing with a single captive screw for easy access to the
wiring terminals. The controller has three LEDs (for
Power, Trouble and Alarm) and a manual test/reset button
(on the cover face).
FIGURE 34
Duct smoke sensor
Exhaust tube
Exhaust gasket
Sensor housing
and electronics
See
Detail A
Intake
gasket
Controller Assembly
Cover gasket
(ordering option)
TSD-CO2
(ordering option)
Sensor cover
Plug
Sampling tube
(ordered separately)
Coupling
Detail A
Duct smoke sensor
controller
Magnetic
test/reset
switch
Conduit nuts
(supplied by installer)
Conduit support plate
Alarm
Trouble
Terminal block cover
Controller housing
and electronics
Cover gasket
(ordering option)
Controller cover
Conduit couplings
(supplied by installer)
Fastener
(2X)
Trouble
Alarm
Power
Test/reset
switch
Sensor
The sensor (see Fig. 35) includes a plastic housing, a
printed circuit board, a clear plastic cover, a sampling tube
26
Power
Dirty
Air is introduced to the duct smoke detector sensor’s
sensing chamber through a sampling tube that extends
into the HVAC duct and is directed back into the
ventilation system through a (shorter) exhaust tube. The
difference in air pressure between the two tubes pulls the
sampled air through the sensing chamber. When a
sufficient amount of smoke is detected in the sensing
chamber, the sensor signals an alarm state and the
controller automatically takes the appropriate action to
shut down fans and blowers, change over air handling
systems, notify the fire alarm control panel, etc.
The sensor uses a process called differential sensing to
prevent gradual environmental changes from triggering
false alarms. A rapid change in environmental conditions,
such as smoke from a fire, causes the sensor to signal an
alarm state but dust and debris accumulated over time
does not.
For installations using two sensors, the duct smoke
detector does not differentiate which sensor signals an
alarm or trouble condition.
Smoke Detector Locations
Supply Air — The Supply Air smoke detector sensor is
located to the left of the unit’s indoor (supply) fan. See
Fig. 36. Access is through the fan access panel. There is
no sampling tube used at this location. The sampling tube
inlet extends through the side plate of the fan housing
(into a high pressure area). The controller is located on a
bracket to the right of the return filter, accessed through
the lift--off filter panel.
FIGURE 36 Typical Supply Air Smoke Detector Sensor Location
FIOP Smoke Detector Wiring and Response
All units: FIOP smoke detector is configured to
automatically shut down all unit operations when smoke
condition is detected. See Fig. 37, Typical Smoke
Detector System Wiring.
Highlight A: JMP 3 is factory--cut, transferring unit control
to smoke detector.
Highlight B: Smoke detector NC contact set will open on
smoke alarm condition, de--energizing the ORN
conductor.
Highlight C: 24--v power signal via ORN lead is removed
at Smoke Detector input on CTB (Control Terminal
Board); all unit operations cease immediately.
Highlight D: On smoke alarm condition, the smoke
detector NO Alarm contact will close, supplying 24--v
power to GRA conductor.
Highlight E: GRA lead at Smoke Alarm input on CTB
provides 24--v signal to FIOP DDC control.
Smoke Detector Sensor
FIGURE 37
Typical Smoke Detector System Wiring
B
D
C
E
A
27
Sensor and Controller Tests
Sensor Alarm Test
The sensor alarm test checks a sensor’s ability to signal
an alarm state. This test requires that you use a SD--MAG
test magnet, approximately 1” long x 1/4” thick x1/4” wide,
located in a plastic bag in the unit control box.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
This test places the duct detector into the alarm
state. Unless part of the test, disconnect all
auxiliary equipment from the controller before
performing the test. If the duct detector is
connected to a fire alarm system, notify the proper
authorities before performing the test.
Sensor Alarm Test Procedure
1. Hold the test magnet where indicated on the side of
the sensor housing for seven seconds.
2. Verify that the sensor’s Alarm LED turns on.
3. Reset the sensor by holding the test magnet against
the sensor housing for two seconds.
4. Verify that the sensor’s Alarm LED turns off.
Controller Alarm Test
The controller alarm test checks the controller’s ability to
initiate and indicate an alarm state.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
This test places the duct detector into the alarm
state. Disconnect all auxiliary equipment from the
controller before performing the test. If the duct
detector is connected to a fire alarm system, notify
the proper authorities before performing the test.
Controller Alarm Test Procedure
1. Press the controller’s test/reset switch for seven
seconds.
2. Verify that the controller’s Alarm LED turns on.
3. Reset the sensor by pressing the test/reset switch for
two seconds.
4. Verify that the controller’s Alarm LED turns off.
Dirty Controller Test
The dirty controller test checks the controller’s ability to
initiate a dirty sensor test and indicate its results.
28
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
Pressing the controller’s test/reset switch for
longer than seven seconds will put the duct
detector into the alarm state and activate all
automatic alarm responses.
Dirty Controller Test Procedure
1. Press the controller’s test/reset switch for two
seconds.
2. Verify that the controller’s Trouble LED flashes.
Dirty Sensor Test
The dirty sensor test provides an indication of the
sensor’s ability to compensate for gradual environmental
changes. A sensor that can no longer compensate for
environmental changes is considered 100% dirty and
requires cleaning or replacing. You must use a factory
provided SD--MAG test magnet to initiate a sensor dirty
test. The sensor’s Dirty LED indicates the results of the
dirty test as shown in Table 12.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
Holding the test magnet against the sensor
housing for more than seven seconds will put the
duct detector into the alarm state and activate all
automatic alarm responses.
Table 12 – Dirty LED Test
FLASHES
1
2
3
4
DESCRIPTION
0---25% dirty. (Typical of a newly installed
detector)
25---50% dirty
51---75% dirty
76---99% dirty
Dirty Sensor Test Procedure
1. Hold the test magnet where indicated on the side of
the sensor housing for two seconds.
2. Verify that the sensor’s Dirty LED flashes.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
Changing the dirty sensor test operation will put
the detector into the alarm state and activate all
automatic alarm responses. Before changing dirty
sensor test operation, disconnect all auxiliary
equipment from the controller and notify the proper
authorities if connected to a fire alarm system.
Changing the Dirty Sensor Test
By default, sensor dirty test results are indicated by:
S The sensor’s Dirty LED flashing.
S The controller’s Trouble LED flashing.
S The controller’s supervision relay contacts toggle.
The operation of a sensor’s dirty test can be changed so
that the controller’s supervision relay is not used to
indicate test results. When two detectors are connected to
a controller, sensor dirty test operation on both sensors
must be configured to operate in the same manner.
To Configure the Dirty Sensor Test Operation
1. Hold the test magnet where indicated on the side of
the sensor housing until the sensor’s Alarm LED turns
on and its Dirty LED flashes twice (approximately 60
seconds).
2. Reset the sensor by removing the test magnet then
holding it against the sensor housing again until the
sensor’s Alarm LED turns off (approximately 2
seconds).
Remote Station Test
The remote station alarm test checks a test/reset station’s
ability to initiate and indicate an alarm state.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
This test places the duct detector into the alarm
state. Unless part of the test, disconnect all
auxiliary equipment from the controller before
performing the test. If the duct detector is
connected to a fire alarm system, notify the proper
authorities before performing the test.
SD--TRM4 (CRSDTEST001A00) Remote Alarm Test
Procedure
1. Turn the key switch to the RESET/TEST position for
seven seconds.
2. Verify that the test/reset station’s Alarm LED turns on.
3. Reset the sensor by turning the key switch to the
RESET/TEST position for two seconds.
4. Verify that the test/reset station’s Alarm LED turns off.
Remote Test/Reset Station Dirty Sensor Test
The test/reset station dirty sensor test checks the
test/reset station’s ability to initiate a sensor dirty test and
indicate the results. It must be wired to the controller as
shown in Fig. 38 and configured to operate the controller’s
supervision relay. For more information, see “Changing
the Dirty Sensor Test.”
FIGURE 38
Remote Test/Reset Station Connections
12
Smoke Detector Controller
1
TB3
3
1
−
2
+
Auxiliary
equipment
14
SD-TR14
Supervision relay
contacts [3]
Trouble
5
13
18 Vdc (+)
Wire must be
added by installer
Power
19
4
15
1
2
3
Alarm
Reset/Test
20
!
18 Vdc (−)
2
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
If the test/reset station’s key switch is left in the
RESET/TEST position for longer than seven
seconds, the detector will automatically go into the
alarm state and activate all automatic alarm
responses.
!
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
Holding the test magnet to the target area for
longer than seven seconds will put the detector
into the alarm state and activate all automatic
alarm responses.
Dirty Sensor Test Using an SD--TRM4
1. Turn the key switch to the RESET/TEST position for
two seconds.
2. Verify that the test/reset station’s Trouble LED
flashes.
29
Table 13 – Detector Indicators
CONTROL OR INDICATOR
Magnetic test/reset switch
Alarm LED
Trouble LED
Dirty LED
Power LED
DESCRIPTION
Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is
in the normal state.
Indicates the sensor is in the alarm state.
Indicates the sensor is in the trouble state.
Indicates the amount of environmental compensation used by the sensor
(flashing continuously = 100%)
Indicates the sensor is energized.
Detector Cleaning
Cleaning the Smoke Detector
Clean the duct smoke sensor when the Dirty LED is
flashing continuously or sooner if conditions warrant.
!
Sensor Cleaning Diagram
FIGURE 39
Sampling
tube
CAUTION
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in
personnel and authority concern.
If the smoke detector is connected to a fire alarm
system, first notify the proper authorities that the
detector is undergoing maintenance then disable
the relevant circuit to avoid generating a false
alarm.
1. Disconnect power from the duct detector then remove
the sensor’s cover. (See Fig. 39.)
2. Using a vacuum cleaner, clean compressed air, or a
soft bristle brush, remove loose dirt and debris from
inside the sensor housing and cover.
Use isopropyl alcohol and a lint--free cloth to remove
dirt and other contaminants from the gasket on the
sensor’s cover.
3. Squeeze the retainer clips on both sides of the optic
housing then lift the housing away from the printed
circuit board.
4. Gently remove dirt and debris from around the optic
plate and inside the optic housing.
5. Replace the optic housing and sensor cover.
6. Connect power to the duct detector then perform a
sensor alarm test.
Airflow
HVAC duct
Sensor
housing
Optic
plate
Retainer
clip
Optic
housing
Indicators
Normal State
The smoke detector operates in the normal state in the
absence of any trouble conditions and when its sensing
chamber is free of smoke. In the normal state, the Power
LED on both the sensor and the controller are on and all
other LEDs are off.
Alarm State
The smoke detector enters the alarm state when the
amount of smoke particulate in the sensor’s sensing
chamber exceeds the alarm threshold value. (See
Table 13.) Upon entering the alarm state:
S The sensor’s Alarm LED and the controller’s Alarm LED
turn on.
S The contacts on the controller’s two auxiliary relays
switch positions.
S The contacts on the controller’s alarm initiation relay
close.
S The controller’s remote alarm LED output is activated
(turned on).
S The controller’s high impedance multiple fan shutdown
control line is pulled to ground Trouble state.
The SuperDuct duct smoke detector enters the trouble
state under the following conditions:
S A sensor’s cover is removed and 20 minutes pass
before it is properly secured.
S A sensor’s environmental compensation limit is reached
(100% dirty).
30
S A wiring fault between a sensor and the controller is
detected.
An internal sensor fault is detected upon entering the
trouble state:
S The contacts on the controller’s supervisory relay switch
positions. (See Fig. 40.)
S If a sensor trouble, the sensor’s Trouble LED and the
controller’s Trouble LED turn on.
S If 100% dirty, the sensor’s Dirty LED turns on and the
controller’s Trouble LED flashes continuously.
S If a wiring fault between a sensor and the controller, the
controller’s Trouble LED turns on but not the sensor’s.
FIGURE 40
Controller Assembly
Trouble
Alarm
Power
Test/reset
switch
NOTE: All troubles are latched by the duct smoke
detector. The trouble condition must be cleared and then
the duct smoke detector must be reset in order to restore
it to the normal state.
Resetting Alarm and Trouble Condition Trips:
Manual reset is required to restore smoke detector
systems to Normal operation. For installations using two
sensors, the duct smoke detector does not differentiate
which sensor signals an alarm or trouble condition. Check
each sensor for Alarm or Trouble status (indicated by
LED). Clear the condition that has generated the trip at
this sensor. Then reset the sensor by pressing and
holding the reset button (on the side) for 2 seconds. Verify
that the sensor’s Alarm and Trouble LEDs are now off. At
the controller, clear its Alarm or Trouble state by pressing
and holding the manual reset button (on the front cover)
for 2 seconds. Verify that the controller’s Alarm and
Trouble LEDs are now off. Replace all panels.
Controller’s Trouble LED is Flashing
1. One or both of the sensors is 100% dirty.
2. Determine which Dirty LED is flashing then clean that
sensor assembly as described in the detector
cleaning section.
Sensor’s Trouble LED is On
1. Check the sensor’s Dirty LED. If it is flashing, the
sensor is dirty and must be cleaned.
2. Check the sensor’s cover. If it is loose or missing,
secure the cover to the sensor housing.
3. Replace sensor assembly.
Sensor’s Power LED is Off
1. Check the controller’s Power LED. If it is off,
determine why the controller does not have power
and make the necessary repairs.
2. Check the wiring between the sensor and the
controller. If wiring is loose or missing, repair or
replace as required.
Controller’s Power LED is Off
1. Make sure the circuit supplying power to the controller
is operational. If not, make sure JP2 and JP3 are set
correctly on the controller before applying power.
2. Verify that power is applied to the controller’s supply
input terminals. If power is not present, replace or
repair wiring as required.
Remote Test/Reset Station’s Trouble LED Does Not
flash When Performing a Dirty Test, But the Controller’s Trouble LED Does
1. Verify that the remote test/station is wired as shown in
Fig. 38. Repair or replace loose or missing wiring.
2. Configure the sensor dirty test to activate the
controller’s supervision relay. See “To Configure the
Dirty Sensor Test Operation” for details.
Sensor’s Trouble LED is On, But the Controller’s
Trouble LED is OFF
Remove JP1 on the controller.
Troubleshooting
Controller’s Trouble LED is On
1. Check the Trouble LED on each sensor connected to
the controller. If a sensor’s Trouble LED is on,
determine the cause and make the necessary repairs.
2. Check the wiring between the sensor and the
controller. If wiring is loose or missing, repair or
replace as required.
31
ECONOMIZER SYSTEMS
The RHS units may be equipped with a factory--installed
or accessory (field--installed) economizer system.
Available with a logic control system See Fig. 41 for
component locations. See Fig. 42 for economizer section
wiring diagrams.
FIGURE 42
Component Locations
ECONOMI$ER IV
CONTROLLER
WIRING
HARNESS
ACTUATOR
OUTSIDE AIR
TEMPERATURE SENSOR
LOW AMBIENT
SENSOR
Economizer Wiring
Economizer
32
FIGURE 41
2 Position Damper
Unit Without Economizer or
2 Position Damper
Table 14 – Economizer Input/Output Logic
Demand Control
Ventilation (DCV)
Below set
(DCV LED Off)
Above set
(DCV LED On)
INPUTS
Enthalpy*
Compressor
Outdoor
Return
High
(Free Cooling LED Off)
Low
Low
(Free Cooling LED On)
High
High
(Free Cooling LED Off)
Low
Low
(Free Cooling LED On)
High
Y1
Y2
Stage
1
Stage
2
On
On
Off
On
On
Off
On
On
Off
On
On
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
On
Off
On
Off
Off
On
On
Off
On
Off
Off
On
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
OUTPUTS
N Terminal†
Occupied
Damper
Unoccupied
Minimum position
Closed
Modulating** (between min.
position and full-open)
Modulating** (between
closed and full-open)
Minimum position
Closed
Modulating†† (between min.
position and DCV
maximum)
Modulating†† (between
closed and DCV
maximum)
Modulating***
Modulating†††
*
†
**
††
***
For single enthalpy control, the module compares outdoor enthalpy to the ABCD setpoint.
Power at N terminal determines Occupied/Unoccupied setting: 24 vac (Occupied), no power (Unoccupied).
Modulation is based on the supply-air sensor signal.
Modulation is based on the DCV signal.
Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum position (DCV) or fully
open (supply-air signal).
††† Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV) or fully open
(supply-air signal).
FIGURE 43
Economizer Functional View
Economizer
Table 14 provides a summary of
Troubleshooting instructions are enclosed.
Economizer.
A functional view of the economizer is shown in Fig. 43.
Typical settings, sensor ranges, and jumper positions are
also shown.
Economizer Standard Sensors
Outdoor Air Temperature (OAT) Sensor
The outdoor air temperature sensor (HH57AC074) is a 10
to 20 mA device used to measure the outdoor-air
temperature. The outdoor-air temperature is used to
determine when the Economizer can be used for free
cooling. The sensor is factory-installed on the Economizer
in the outdoor airstream. (See Fig. 41.) The operating
range of temperature measurement is 40_ to 100_F (4_ to
38_C). See Fig. 46.
Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3 K thermistor
located at the inlet of the indoor fan. (See Fig. 44.) This
sensor is factory installed. The operating range of
temperature measurement is 0° to 158_F (--18_ to 70_C).
33
FIGURE 44
Supply Air Sensor Location
SUPPLY AIR
TEMPERATURE
SENSOR
MOUNTING
LOCATION
SUPPLY AIR
TEMPERATURE
SENSOR
The temperature sensor looks like an eyelet terminal with
wires running to it. The sensor is located in the “crimp
end” and is sealed from moisture.
Outdoor Air Lockout Sensor
The Economizer is equipped with an ambient temperature
lockout switch located in the outdoor airstream which is
used to lock out the compressors below a 42_F (6_C)
ambient temperature. (See Fig. 41.)
Outdoor Dry Bulb Changeover
The standard controller is shipped from the factory
configured for outdoor dry bulb changeover control. The
outdoor air and supply air temperature sensors are
included as standard. For this control mode, the outdoor
temperature is compared to an adjustable setpoint
selected on the control. If the outdoor-air temperature is
above the setpoint, the economizer will adjust the outside
air dampers to minimum position. If the outdoor-air
temperature is below the setpoint, the position of the
outside air dampers will be controlled to provided free
cooling using outdoor air. When in this mode, the LED
next to the free cooling setpoint potentiometer will be on.
The changeover temperature setpoint is controlled by the
free cooling setpoint potentiometer located on the control.
(See Fig. 45.) The scale on the potentiometer is A, B, C,
and D. See Fig. 46 for the corresponding temperature
changeover values.
FIGURE 45
Economizer Controller Potentiometer and LED
Locations
FIGURE 46
Outside Air Temperature Changeover Setpoints
Economizer Control Modes
Determine the Economizer control mode before set up of
the control. Some modes of operation may require
different sensors. (See Table 15.) The Economizer is
supplied from the factory with a supply--air temperature
sensor and an outdoor-- air temperature sensor. This
allows for operation of the Economizer with outdoor air
dry bulb changeover control. Additional accessories can
be added to allow for different types of changeover control
and operation of the Economizer and unit.
Table 15 – Economizer Sensor Usage
Economizer WITH OUTDOOR AIR DRY
BULB SENSOR
Outdoor Air
Dry Bulb
None. The outdoor air dry bulb sensor is
factory installed.
Differential
Dry Bulb
DNTEMPSN002A00*
Single Enthalpy
AXB078ENT
Differential
Enthalpy
AXB078ENT and DNENTDIF004A00*
Accessories Required
CO2 for DCV
Control using a
Duct-Mounted CO2
Sensor
LED ON
18
D
17
LED OFF
16
15
14
DNCBDIOX005A00††
* DNENTDIF004A00 and DNTEMPSN002A00 accessories are used
on many different base units. As such, these kits may contain parts
that will not be needed for installation.
† 33ZCSENCO2 is an accessory CO2 sensor.
** 33ZCASPCO2 is an accessory aspirator box required for
duct-mounted applications.
†† DNCBDIOX005A00 is an accessory that contains both
33ZCSENCO2 and 33ZCASPCO2 accessories.
34
19
mA
APPLICATION
LED ON
C
LED OFF
13
12
LED ON
B
LED OFF
LED ON
A
11
10
LED OFF
9
40
45
50
55
60
65 70 75 80
DEGREES FAHRENHEIT
85
90
95
100
FLOW IN CUBIC FEET PER MINUTE (cfm)
controller. The setpoints are A, B, C, and D. (See Fig. 49.)
The factory-installed 620-ohm jumper must be in place
across terminals SR and SR+ on the Economizer
controller (see Fig. 42).
Outside Air Damper Leakage
FIGURE 47
30
In this mode of operation, the outdoor-air temperature is
compared to the return-air temperature and the lower
temperature airstream is used for cooling. When using
this mode of changeover control, turn the enthalpy
setpoint potentiometer fully clockwise to the D setting.
(See Fig. 45.)
25
20
15
10
5
0
0.13
0.20 0.22
0.25
0.30 0.35 0.40
0.45
0.50
Return Air Temperature or Enthalpy Sensor
Mounting Location
FIGURE 48
STATIC PRESSURE (in. wg)
ECONOMI$ERIV
CONTROLLER
Differential Dry Bulb Control
For differential dry bulb control the standard outdoor dry
bulb sensor is used in conjunction with an additional
accessory
dry
bulb
sensor
(part
number
DNTEMPSN002A00). The accessory sensor must be
mounted in the return airstream. (See Fig. 49.) Wiring is
provided in the economizer wiring harness.
ECONOMI$ERIV
Outdoor Enthalpy Changeover
GROMMET
For enthalpy control, accessory enthalpy sensor (part
number AXB078ENT) is required. Replace the standard
outdoor dry bulb temperature sensor with the accessory
enthalpy sensor in the same mounting location. (See
Fig. 41.) When the outdoor air enthalpy rises above the
outdoor enthalpy changeover setpoint, the outdoor-air
damper moves to its minimum position. The outdoor
enthalpy changeover setpoint is set with the outdoor
enthalpy setpoint potentiometer on the Economizer
RETURN DUCT
(FIELD-PROVIDED)
Enthalpy Changeover Setpoints
46
85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)
44
CONTROL CONTROL POINT
CURVE
APPROX. deg. F (deg. C)
80
(27)
42
AT 50% RH
IDI
UM
EH
TIV
R
PE
LA
32
U
RE
30
22
70
80
60
24
65
(18)
10
0
90
TH
26
EN
70
(21)
28
AL
PY
BT
75
(24)
34
PO
UN
TY
38
(%
RY
)
40
AI
R
73 (23)
70 (21)
67 (19)
63 (17)
36 D D
20
50
60
(16)
A
40
16
18
55
(13) B
14
50
(10)
45
(7)
30
A
B
C
D
12
FIGURE 49
RETURN AIR
SENSOR
C
20
D
40
(4)
10
35
(2)
B A
D C
35
(2)
40
(4)
45
(7)
50
(10)
HIGH LIMIT
CURVE
55
60
65
70
75
80
85
90
95 100 105 110
(13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)
APPROXIMATE DRY BULB TEMPERATURE--degrees F (degrees C)
35
FIGURE 50
Economizer Control
FIGURE 51
CO2 Sensor Maximum Range Settings
CO2 SENSOR MAX RANGE SETTING
TR1
N
24
Vac
HOT
24 Vac
COM
Set
10V
2V
EXH
P1
P
Min
Pos
T1
DCV
2V
AQ
SR+
SR
Max
10V
1
2V
2
5
DCV
SO+
SO
_
Open
T
AQ1
+
DCV
Set
10V
Free
Cool
B
C
A
D
3
EF
4
EF1
Differential Enthalpy Control
For differential enthalpy control, the Economizer controller
uses two enthalpy sensors (AXB078ENT and
DNENTDIF004A00), one in the outside air and one in the
return air duct. The economizer controller compares the
outdoor air enthalpy to the return air enthalpy to
determine economizer use. The controller selects the
lower enthalpy air (return or outdoor) for cooling. For
example, when the outdoor air has a lower enthalpy than
the return air, the economizer opens to bring in outdoor air
for free cooling.
Replace the standard outside air dry bulb temperature
sensor with the accessory enthalpy sensor in the same
mounting location. (See Fig. 41.) Mount the return air
enthalpy sensor in the return air duct. (See Fig. 48.)
Wiring is provided in the economizer wiring harness. (See
Fig. 41.) The outdoor enthalpy changeover setpoint is set
with the outdoor enthalpy setpoint potentiometer on the
Economizer controller. When using this mode of
changeover control, turn the enthalpy setpoint
potentiometer fully clockwise to the D setting.
Indoor Air Quality (IAQ) Sensor Input
The IAQ input can be used for demand control ventilation
control based on the level of CO2 measured in the space
or return air duct.
Mount the accessory IAQ sensor according to
manufacturer specifications. The IAQ sensor should be
wired to the AQ and AQ1 terminals of the controller.
Adjust the DCV potentiometers to correspond to the DCV
voltage output of the indoor air quality sensor at the
user-determined setpoint. (See Fig. 51.)
6000
RANGE CONFIGURATION (ppm)
TR
EXH
N1
5000
4000
800 ppm
900 ppm
1000 ppm
1100 ppm
3000
2000
1000
0
2
3
4
5
6
7
8
DAMPER VOLTAGE FOR MAX VENTILATION RATE
If a separate field-supplied transformer is used to power
the IAQ sensor, the sensor must not be grounded or the
Economizer control board will be damaged.
When using demand ventilation, the minimum damper
position represents the minimum ventilation position for
VOC
(volatile
organic
compounds)
ventilation
requirements. The maximum demand ventilation position
is used for fully occupied ventilation.
When demand ventilation control is not being used, the
minimum position potentiometer should be used to set the
occupied ventilation position. The maximum demand
ventilation position should be turned fully clockwise.
Exhaust Setpoint Adjustment
The exhaust setpoint will determine when the exhaust fan
runs based on damper position (if accessory power
exhaust is installed). The setpoint is modified with the
Exhaust Fan Setpoint (EXH SET) potentiometer. (See
Fig. 45.) The setpoint represents the damper position
above which the exhaust fans will be turned on. When
there is a call for exhaust, the Economizer controller
provides a 45 ±15 second delay before exhaust fan
activation to allow the dampers to open. This delay allows
the damper to reach the appropriate position to avoid
unnecessary fan overload.
Minimum Position Control
There is a minimum damper position potentiometer on the
economizer controller. (See Fig. 45.) The minimum
damper position maintains the minimum airflow into the
building during the occupied period.
When using demand ventilation, the minimum damper
position represents the minimum ventilation position for
VOC
(volatile
organic
compound)
ventilation
requirements. The maximum demand ventilation position
is used for fully occupied ventilation.
When demand ventilation control is not being used, the
minimum position potentiometer should be used to set the
occupied ventilation position. The maximum demand
ventilation position should be turned fully clockwise.
Adjust the minimum position potentiometer to allow the
minimum amount of outdoor air, as required by local
36
codes, to enter the building. Make minimum position
adjustments with at least 10_F temperature difference
between the outdoor and return-air temperatures.
temperature sensors. Connections are made at the
thermostat terminal connection board located in the main
control box.
To determine the minimum position setting, perform the
following procedure:
Occupancy Control
OA = Percent of Outdoor Air
The factory default configuration for the economizer
control is occupied mode. Occupied status is provided by
the black jumper from terminal TR to terminal N. When
unoccupied mode is desired, install a field--supplied
timeclock function in place of the jumper between TR
and N. When the timeclock contacts are closed, the
Economizer control will be in occupied mode. When the
timeclock contacts are open (removing the 24--v signal
from terminal N), the Economizer will be in unoccupied
mode.
TR = Return-Air Temperature
Demand Control Ventilation (DCV)
RA = Percent of Return Air
When using the economizer for demand controlled
ventilation, there are some equipment selection criteria
which should be considered. When selecting the heat
capacity and cool capacity of the equipment, the
maximum ventilation rate must be evaluated for design
conditions. The maximum damper position must be
calculated to provide the desired fresh air.
1. Calculate the appropriate mixed air temperature using
the following formula:
(TO x
OA
) + (TR
100
x
RA
) =TM
100
TO = Outdoor-Air Temperature
TM = Mixed-Air Temperature
As an example, if local codes require 10% outdoor air
during occupied conditions, outdoor-air temperature is
60_F, and return-air temperature is 75_F.
(60 x .10) + (75 x .90) = 73.5_F
2. Disconnect the supply air sensor from terminals T and
T1.
3. Ensure that the factory-installed jumper is in place
across terminals P and P1. If remote damper
positioning is being used, make sure that the
terminals are wired according to Fig. 42 and that the
minimum position potentiometer is turned fully
clockwise.
4. Connect 24 vac across terminals TR and TR1.
5. Carefully adjust the minimum position potentiometer
until the measured mixed air temperature matches the
calculated value.
6. Reconnect the supply air sensor to terminals T and
T1.
Remote control of the economizer damper is desirable
when requiring additional temporary ventilation. If a
field-supplied remote potentiometer (Honeywell part
number S963B1128) is wired to the economizer controller,
the minimum position of the damper can be controlled
from a remote location.
To control the minimum damper position remotely, remove
the factory-installed jumper on the P and P1 terminals on
the economizer controller. Wire the field-supplied
potentiometer to the P and P1 terminals on the
economizer controller. (See Fig. 50.)
Damper Movement
Damper movement from full open to full closed (or vice
versa) takes 21/2 minutes.
Thermostats
The economizer control works with conventional
thermostats that have a Y1 (cool stage 1), Y2 (cool stage
2), W1 (heat stage 1), W2 (heat stage 2), and G (fan).
The economizer control does not support space
Typically the maximum ventilation rate will be about 5 to
10% more than the typical cfm required per person, using
normal outside air design criteria.
A proportional anticipatory strategy should be taken with
the following conditions: a zone with a large area, varied
occupancy, and equipment that cannot exceed the
required ventilation rate at design conditions. Exceeding
the required ventilation rate means the equipment can
condition air at a maximum ventilation rate that is greater
than the required ventilation rate for maximum occupancy.
A proportional-anticipatory strategy will cause the fresh air
supplied to increase as the room CO2 level increases
even though the CO2 setpoint has not been reached. By
the time the CO2 level reaches the setpoint, the damper
will be at maximum ventilation and should maintain the
setpoint.
In order to have the CO2 sensor control the economizer
damper in this manner, first determine the damper voltage
output for minimum or base ventilation. Base ventilation is
the ventilation required to remove contaminants during
unoccupied periods. The following equation may be used
to determine the percent of outside air entering the
building for a given damper position. For best results
there should be at least a 10 degree difference in outside
and return-air temperatures.
(TO x
OA
) + (TR
100
x
RA
) =TM
100
TO = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air Temperature
RA = Percent of Return Air
TM = Mixed-Air Temperature
37
Once base ventilation has been determined, set the
minimum damper position potentiometer to the correct
position.
The same equation can be used to determine the
occupied or maximum ventilation rate to the building. For
example, an output of 3.6 volts to the actuator provides a
base ventilation rate of 5% and an output of 6.7 volts
provides the maximum ventilation rate of 20% (or base
plus 15 cfm per person). Use Fig. 51 to determine the
maximum setting of the CO2 sensor. For example, an
1100 ppm setpoint relates to a 15 cfm per person design.
Use the 1100 ppm curve on Fig. 51 to find the point when
the CO2 sensor output will be 6.7 volts. Line up the point
on the graph with the left side of the chart to determine
that the range configuration for the CO2 sensor should be
1800 ppm. The Economizer controller will output the 6.7
volts from the CO2 sensor to the actuator when the CO2
concentration in the space is at 1100 ppm. The DCV
setpoint may be left at 2 volts since the CO2 sensor
voltage will be ignored by the Economizer controller until it
rises above the 3.6 volt setting of the minimum position
potentiometer.
Once the fully occupied damper position has been
determined, set the maximum damper demand control
ventilation potentiometer to this position. Do not set to the
maximum position as this can result in over-ventilation to
the space and potential high humidity levels.
CO2 Sensor Configuration
The CO2 sensor has preset standard voltage settings that
can be selected anytime after the sensor is powered up.
(See Table 16.)
Use setting 1 or 2. (See Table 16.)
1. Press Clear and Mode buttons. Hold at least 5
seconds until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to select the preset number.
(See Table 16.)
4. Press Enter to lock in the selection.
5. Press Mode to exit and resume normal operation.
The custom settings of the CO2 sensor can be changed
anytime after the sensor is energized. Follow the steps
below to change the non-standard settings:
1. Press Clear and Mode buttons. Hold at least 5
seconds until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to toggle to the NONSTD
menu and press Enter.
4. Use the Up/Down button to toggle through each of the
nine variables, starting with Altitude, until the desired
setting is reached.
5. Press Mode to move through the variables.
6. Press Enter to lock in the selection, then press Mode
to continue to the next variable.
Dehumidification of Fresh Air with DCV (Demand
Controlled Ventilation) Control
If normal rooftop heating and cooling operation is not
adequate for the outdoor humidity level, an energy
recovery unit and/or a dehumidification option should be
considered.
Table 16 – CO2 Sensor Standard Settings
SETTING
EQUIPMENT
1
2
Interface w/Standard
Building Control System
3
4
5
6
Economizer
7
8
Health & Safety
9
Parking/Air Intakes/
Loading Docks
LEGEND: ppm — Parts Per Million
38
OUTPUT
VENTILATION
RATE
(cfm/Person)
ANALOG
OUTPUT
CO2
CONTROL RANGE
(ppm)
OPTIONAL
RELAY SETPOINT
(ppm)
RELAY
HYSTERESIS
(ppm)
Proportional
Any
0-10V
4-20 mA
0-2000
1000
50
Proportional
Any
2-10V
7-20 mA
0-2000
1000
50
Exponential
Any
0-10V
4-20 mA
0-2000
1100
50
Proportional
15
0-10V
4-20 mA
0-1100
1100
50
Proportional
20
0-10V
4-20 mA
0- 900
900
50
Exponential
15
0-10V
4-20 mA
0-1100
1100
50
Exponential
20
0-10V
4-20 mA
0- 900
900
50
Proportional
—
0-10V
4-20 mA
0-9999
5000
500
—
0-10V
4-20 mA
0-2000
700
50
Proportional
Economizer Preparation
This procedure is used to prepare the Economizer for
troubleshooting. No troubleshooting or testing is done by
performing the following procedure.
NOTE: This procedure requires a 9--v battery, 1.2
kilo--ohm resistor, and a 5.6 kilo--ohm resistor which are
not supplied with the Economizer.
IMPORTANT: Be sure to record the positions of all
potentiometers before starting troubleshooting.
1. Disconnect power at TR and TR1. All LEDs should be
off. Exhaust fan contacts should be open.
2. Disconnect device at P and P1.
3. Jumper P to P1.
4. Disconnect wires at T and T1. Place 5.6 kilo--ohm
resistor across T and T1.
5. Jumper TR to 1.
6. Jumper TR to N.
7. If connected, remove sensor from terminals SO and
+. Connect 1.2 kilo--ohm 4074EJM checkout resistor
across terminals SO and +.
8. Put 620--ohm resistor across terminals SR and +.
9. Set minimum position, DCV setpoint, and exhaust
potentiometers fully CCW (counterclockwise).
10. Set DCV maximum position potentiometer fully CW
(clockwise).
11. Set enthalpy potentiometer to D.
12. Apply power (24 vac) to terminals TR and TR1.
Differential Enthalpy
To check differential enthalpy:
1. Make sure Economizer preparation procedure has
been performed.
2. Place 620--ohm resistor across SO and +.
3. Place 1.2 kilo--ohm resistor across SR and +. The
Free Cool LED should be lit.
4. Remove 620--ohm resistor across SO and +. The
Free Cool LED should turn off.
5. Return Economizer settings and wiring to normal after
completing troubleshooting.
Single Enthalpy
To check single enthalpy:
1. Make sure Economizer preparation procedure has
been performed.
2. Set the enthalpy potentiometer to A (fully CCW). The
Free Cool LED should be lit.
3. Set the enthalpy potentiometer to D (fully CW). The
Free Cool LED should turn off.
4. Return Economizer settings and wiring to normal after
completing troubleshooting.
DCV (Demand Controlled Ventilation) and Power
Exhaust
To check DCV and Power Exhaust:
1. Make sure Economizer preparation procedure has
been performed.
2. Ensure terminals AQ and AQ1 are open. The LED for
both DCV and Exhaust should be off. The actuator
should be fully closed.
3. Connect a 9--v battery to AQ (positive node) and AQ1
(negative node). The LED for both DCV and Exhaust
should turn on. The actuator should drive to between
90 and 95% open.
4. Turn the Exhaust potentiometer CW until the Exhaust
LED turns off. The LED should turn off when the
potentiometer is approximately 90%. The actuator
should remain in position.
5. Turn the DCV setpoint potentiometer CW until the
DCV LED turns off. The DCV LED should turn off
when the potentiometer is approximately 9--v. The
actuator should drive fully closed.
6. Turn the DCV and Exhaust potentiometers CCW until
the Exhaust LED turns on. The exhaust contacts will
close 30 to 120 seconds after the Exhaust LED turns
on.
7. Return Economizer settings and wiring to normal after
completing troubleshooting.
DCV Minimum and Maximum Position
To check the DCV minimum and maximum position:
1. Make sure Economizer preparation procedure has
been performed.
2. Connect a 9--v battery to AQ (positive node) and AQ1
(negative node). The DCV LED should turn on. The
actuator should drive to between 90 and 95% open.
3. Turn the DCV Maximum Position potentiometer to
midpoint. The actuator should drive to between 20
and 80% open.
4. Turn the DCV Maximum Position potentiometer to
fully CCW. The actuator should drive fully closed.
5. Turn the Minimum Position potentiometer to midpoint.
The actuator should drive to between 20 and 80%
open.
6. Turn the Minimum Position Potentiometer fully CW.
The actuator should drive fully open.
7. Remove the jumper from TR and N. The actuator
should drive fully closed.
8. Return Economizer settings and wiring to normal after
completing troubleshooting.
Supply--Air Sensor Input
To check supply--air sensor input:
1. Make sure Economizer preparation procedure has
been performed.
2. Set the Enthalpy potentiometer to A. The Free Cool
LED turns on. The actuator should drive to between
20 and 80% open.
3. Remove the 5.6 kilo--ohm resistor and jumper T to T1.
The actuator should drive fully open.
4. Remove the jumper across T and T1. The actuator
should drive fully closed.
39
5. Return Economizer settings and wiring to normal after
completing troubleshooting.
Economizer Troubleshooting Completion
This procedure is used to return the Economizer to
operation. No troubleshooting or testing is done by
performing the following procedure.
1. Disconnect power at TR and TR1.
2. Set enthalpy potentiometer to previous setting.
3. Set DCV maximum position potentiometer to previous
setting.
4. Set minimum position, DCV setpoint, and exhaust
potentiometers to previous settings.
5. Remove 620--ohm resistor from terminals SR and +.
6. Remove 1.2 kilo--ohm checkout resistor from
terminals SO and +. If used, reconnect sensor from
terminals SO and +.
7. Remove jumper from TR to N.
8. Remove jumper from TR to 1.
9. Remove 5.6 kilo--ohm resistor from T and T1.
Reconnect wires at T and T1.
10. Remove jumper from P to P1. Reconnect device at P
and P1.
11. Apply power (24 vac) to terminals TR and TR1.
WIRING DIAGRAMS
See Figure 52 and 53 for Typical Wiring Diagrams
FIGURE 52
40
208/230, 460, 575V -- 3 Phase
FIGURE 53
RHS Typical Unit Wiring Diagram -- Power (Unit 090 208/230--3--60)
41
PRE--START--UP
!
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in
personal injury or death.
1. Follow recognized safety practices and wear
protective goggles when checking or servicing
refrigerant system.
2. Do not operate compressor or provide any
electric power to unit unless compressor
terminal cover is in place and secured.
3. Do not remove compressor terminal cover
until all electrical sources are disconnected.
4. Relieve all pressure from system before
touching or disturbing anything inside terminal
box if refrigerant leak is suspected around
compressor terminals.
5. Never attempt to repair soldered connection
while refrigerant system is under pressure.
6. Do not use torch to remove any component.
System contains oil and refrigerant under
pressure. To remove a component, wear
protective goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure
from system using both high--pressure and
low pressure ports.
c. Cut component connection tubing with
tubing cutter and remove component from
unit.
d. Carefully unsweat remaining tubing stubs
when necessary. Oil can ignite when
exposed to torch flame.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in
personal injury or death.
The unit must be electrically grounded in
accordance with local codes and NEC ANSI/NFPA
70
(American
National
Standards
Institute/National Fire Protection Association.)
Proceed as follows to inspect and prepare the unit for
initial start--up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit.
WARNING
!
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could result in
personal injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants.
Keep torches and other ignition sources away
from refrigerants and oils.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, or disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a
refrigerant leak. Leak--test all refrigerant tubing
connections using electronic leak detector, halide
torch, or liquid--soap solution.
c. Inspect all field--wiring and factory--wiring
connections. Be sure that connections are
completed and tight. Be sure that wires are not in
contact with refrigerant tubing or sharp edges.
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that condenser--fan blade are correctly
positioned in fan orifice. See Condenser--Fan
Adjustment section for more details.
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain trap is filled with
water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose
parts have been removed.
START--UP, GENERAL
Unit Preparation
Make sure that unit has been installed in accordance with
installation instructions and applicable codes.
Return--Air Filters
Make sure correct filters are installed in unit (see
Appendix II -- Physical Data). Do not operate unit without
return--air filters.
Outdoor--Air Inlet Screens
Outdoor--air inlet screen must be in place before
operating unit.
Compressor Mounting
Compressors are internally spring mounted. Do not
loosen or remove compressor hold down bolts.
Internal Wiring
Check all electrical connections in unit control boxes.
Tighten as required.
42
Refrigerant Service Ports
Each unit system has two 1/4” SAE flare (with check
valves) service ports: one on the suction line, and one on
the compressor discharge line. Be sure that caps on the
ports are tight.
Compressor Rotation
On 3--phase units with scroll compressors, it is important
to be certain compressor is rotating in the proper
direction. To determine whether or not compressor is
rotating in the proper direction:
1. Connect service gauges to suction and discharge
pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start--up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
If electric heaters do not energize, reset limit switch
(located on supply--fan scroll) by pressing button located
between terminals on the switch.
To shut off unit -- set system selector switch at OFF
position. Resetting thermostat at a position below room
temperature temporarily shuts unit off until space
temperature falls below thermostat setting.
Ventilation (Continuous Fan)
Set fan and system selector switches at ON and OFF
positions, respectively. Supply fan operates continuously
to provide constant air circulation.
OPERATING SEQUENCE
Indoor (Supply) Fan
Continuous fan operation is selected at the thermostat.
Terminal G is energized. Defrost Board (DFB) receives
this signal at P2--3 and it issues an output at P3--9.
1. Note that the evaporator fan is probably also rotating
in the wrong direction.
2. Turn off power to the unit and install lockout tag.
3. Reverse any two of the unit power leads.
4. Re--energize to the compressor. Check pressures.
036--060, Standard Static Drive option: 24--v signal at
P3--9 is applied to direct--drive motor communication
signal terminal. Direct--drive motor starts and runs.
The suction and discharge pressure levels should now
move to their normal start--up levels.
Fan runs continuously until fan selection at thermostat is
changed to AUTO. When the selector switch is switched
to AUTO, the input at P2--3 is removed and the output at
P3--9 is removed; IFC is de--energized and IFM stops. If
the fan selection is AUTO, indoor fan operation will be
initiated by the DFB through P3--9 when Cooling or
Heating sequence is initiated. Termination of fan operation
will be delayed by 30 secs (if Fan Delay is configured to
ON) after Cooling or Heating sequence is ended
NOTE: When the compressor is rotating in the wrong
direction, the unit will make an elevated level of noise and
will not provide cooling.
Cooling
Set space thermostat to OFF position. To start unit, turn
on main power supply. Set system selector switch at
COOL position and fan switch at AUTO. position. Adjust
thermostat to a setting below room temperature.
Compressor starts on closure of contactor. (090–102:
Second stage of thermostat will energize Circuit 2
contactor, start Compressor 2.)
All Belt--Drive Fan options: Contactor coil IFC is
energized; indoor fan motor starts.
Base Unit Controls
Cooling, Units Without Economizer
Check unit charge. Refer to Refrigerant Charge section.
Continuous fan operation is selected at the thermostat.
Terminal G is energized. Defrost Board (DFB) receives
this signal at P2--3 and it issues an output at P3--9.
Reset thermostat at a position above room temperature.
Compressor will shut off. Evaporator fan will shut off after
a 30--second delay.
036--060, Standard Static Drive option: 24--v signal at
P3--9 is applied to direct--drive motor communication
signal terminal. Direct--drive motor starts and runs.
To shut off unit -- set system selector switch at OFF
position. Resetting thermostat at a position above room
temperature shuts unit off temporarily until space
temperature exceeds thermostat setting.
All Belt--Drive Fan options: Contactor coil IFC is
energized; indoor fan motor starts.
Heating
To start unit, turn on main power supply.
Set system selector switch at HEAT position and set
thermostat at a setting above room temperature. Set fan
at AUTO position.
First stage of thermostat energizes compressor heating
(090–102: both compressors will start). Second stage of
thermostat energizes electric heaters (if installed). Check
heating effects at air supply grille(s).
Fan runs continuously until fan selection at thermostat is
changed to AUTO. When the selector switch is switched
to AUTO, the input at P2--3 is removed and the output at
P3--9 is removed; IFC is de--energized and IFM stops. If
the fan selection is AUTO, indoor fan operation will be
initiated by the DFB through P3--9 when Cooling or
Heating sequence is initiated. Termination of fan operation
will be delayed by 30 secs (if Fan Delay is configured to
ON) after Cooling or Heating sequence is ended.
The outdoor fan motors run continuously while unit is in
Stage 1 or Stage 2 cooling.
090–102: If Stage 1 cooling does not satisfy the space
load, the space temperature will rise until thermostat calls
43
for Stage 2 cooling (Y2 closes). DFB receives this input
at P2--4. It issues outputs at P3--6 (RVS2) and P3--8
(COMP2). Reversing valve 2 switches to Cooling position.
Compressor 2 contactor (C2) is energized; Compressor 2
starts and Circuit 2 operates in Cooling mode.
When Cooling Stage 2 is satisfied, thermostat Y2 opens.
Compressor 2 contactor (C2) is de--energized;
Compressor 2 stops. RVS2 remains energized.
When Cooling Stage 1 is satisfied, thermostat Y1 opens.
Compressor 1 contactor (C1) is de--energized;
Compressor 1 stops.
Outdoor fan relay OFR is
de--energized; outdoor fans stop. After the Fan Delay
period, the Indoor fan contactor IFC is de--energized;
indoor fan stops (unless Continuous Fan operation has
been selected). RVS1 remains energized.
Reversing valve solenoids are energized in Cooling
modes. Each solenoid will remain energized until the next
Heating mode is initiated for this circuit.
Heating, Units Without Economizer
036--072 (single compressor model): When the
thermostat calls for heating, terminal W1 is energized.
DFB receives this input at P2–7. The DFB removes the
output at P3–7 (RVS1) reversing valve solenoid is
de--energized and reversing valve moves to Heating
position. DFB issues outputs at P3–9 (IFO), OF, and
P3–10 (COMP1). The indoor fan motor or contactor (IFC)
is energized; indoor fan motor starts. Outdoor fan relay
OFR is energized; outdoor fan motor runs. Compressor
contactor C1 is energized; refrigeration circuit operates in
Heating mode.
090--102 (two compressor model): When the thermostat
calls for heating, terminal W1 is energized. DFB receives
this input at P2–7. The DFB removes the outputs at P3–7
(RVS1) and P3–6 (RVS2)); both reversing valve solenoids
are de--energized and reversing valves move to Heating
position. DFB issues outputs at P3–9 (IFO), OF, P3–10
(COMP1) and P3–8 (COMP2)). The indoor fan contactor
(IFC) is energized; indoor fan motor starts. Outdoor fan
relay OFR is energized; both outdoor fan motors run.
Compressor contactors C1 and C2 are energized; both
refrigeration circuits operate in Heating mode.
If Stage 1 heating does not satisfy the space load, the
space temperature will fall until thermostat calls for Stage
2 heating (W2 closes). Terminal W2 is energized. DFB
receives input at P2--6. DFB issues an output at EHEAT.
Heater contactor 1 (HC1) and heater contactor 2 (HC2) (if
installed) are energized; all electric heaters are energized.
When space heating load is partially satisfied, thermostat
terminal W2 is de--energized; this signal is removed at
DFB P2--6. DFB output at EHEAT is removed; heater
contactors HC1 and HC2 are de--energized and all
electric heat is terminated. Stage 1 heating continues.
When the space heating load is fully satisfied, thermostat
terminal W1 is also de--energized. DFB removes outputs
at P3--10 (COMP1), P3--8 (COMP2) and OF. All
compressor and outdoor fan operations cease. After the
Fan Delay period, output P3--9 is removed and IFM
44
operations cease (unless Continuous Fan operation has
been selected).
Reversing valve solenoids remain de--energized until the
next call for Cooling mode is initiated.
Cooling, Unit With Economizer
For Occupied mode operation of Economizer, there must
be a 24--v signal at terminal N (provided through harness
plug PL6--3 from the unit’s IFC coil). Removing the signal
at N places the Economizer control in Unoccupied mode.
During Occupied mode operation, indoor fan operation
will be accompanied by economizer dampers moving to
Minimum Position setpoint for ventilation. If indoor fan is
off, dampers will close. During Unoccupied mode
operation, dampers will remain closed unless a Cooling
(by free cooling) or DCV demand is received.
When free cooling using outside air is not available, the
unit cooling sequence will be controlled directly by the
space thermostat as described above in Cooling, Unit
Without Economizer. Outside air damper position will be
closed or Minimum Position as determined by occupancy
mode and fan signal.
When free cooling is available as determined by the
appropriate changeover command (dry bulb, outdoor
enthalpy, differential dry bulb or differential enthalpy), a
call for cooling (Y1 closes at the thermostat, signal
through PL6--2 to Econo--1) will cause the economizer
control to modulate the dampers open and closed to
maintain the unit supply air temperature at 50_F to 55_F
(10_C to 12.8_C). Compressor will not run.
During free cooling operation, a supply air temperature
(SAT) above 50_F (10_C) will cause the dampers to
modulate between Minimum Position setpoint and 100%
open. With SAT from 50_F to 45_F (10_C to 7.2_C), the
dampers will maintain at the Minimum Position setting.
With SAT below 45_F (7.2_C), the outside air dampers
will be closed. When SAT rises to 48_F (8.9_C), the
dampers will re--open to Minimum Position setting.
Should 100% outside air not be capable of satisfying the
space temperature, space temperature will rise until Y2 is
closed. The economizer control will call for compressor
operation. Y2 signal is transferred to the DFB’s Y1 input
(P2--5). Stage 1 Cooling is initiated as described above in
Cooling, Unit Without Economizer. Dampers will modulate
to maintain SAT at 50_F to 55_F (10_C to 12.8_C)
concurrent with Compressor 1 operation. When
thermostat Stage 2 cooling is satisfied, DFB outputs for
COMP1 and OF will be removed and mechanical cooling
sequence will terminate.
The Low Ambient Lockout Thermostat will block
compressor operation with economizer operation below
42_F (5.6_C ) outside air temperature.
When space temperature demand is satisfied (thermostat
Y1 opens), the dampers will return to Minimum Damper
position if indoor fan is running or fully closed if fan is off.
If accessory power exhaust is installed, the power
exhaust fan motors will be energized by the economizer
control as the dampers open above the PE--On setpoint
and will be de--energized as the dampers close below the
PE--On setpoint.
Damper movement from full closed to full open (or vice
versa) will take between 11/2 and 21/2 minutes.
Heating With Economizer
During Occupied mode operation, indoor fan operation
will be accompanied by economizer dampers moving to
Minimum Position setpoint for ventilation. If indoor fan is
off, dampers will close. During Unoccupied mode
operation, dampers will remain closed unless a DCV
demand is received.
When the room temperature calls for heat (W1 closes),
the heating controls are energized as described in
Heating, Unit Without Economizer above.
Defrost Cycle
During the Heating Mode, frost and ice can develop on
the outdoor coil. Defrost sequence will clear the frost and
ice from the coil by briefly reversing the Heating sequence
periodically.
A window to test for a need to run the Defrost cycle opens
30 minutes after the end of the last Defrost cycle or the
previous test window closed. If DFT2 is closed, the
Defrost cycle will start. Output at OF is removed; outdoor
fans stop during the Defrost cycle. Output P3--6 (RVS2) is
energized; reversing valve solenoid RVS2 is energized
and reversing valve 2 changes position, placing Circuit 2
in a Cooling mode flow, directing hot gas into the outdoor
coil where its heat melts the frost and looses the ice on
the coil face.
During the Defrost cycle, output EHEAT is also energized
(if not already energized by a thermostat W2 demand);
electric heaters will be energized.
During the Defrost Cycle, LED1 on the DFB will be
illuminated.
The Defrost cycle ends when DFT2 opens (as liquid
temperature exiting the coil rises above DFT2 setpoint) or
the defrost cycle runs for 10 minutes. Output at EHEAT is
removed; electric heaters will be de--energized (unless
thermostat has a W2 demand). Output at OF is restored;
outdoor fans start again. Output at P3--6 (RVS2) is
removed; reversing valve 2 returns to Heating position.
During the Circuit 2 defrost cycle, Circuit 1 may also enter
defrost cycle if DFT1 closes. When DFT1 closes, DFB
output P3--7 (RVS1) is energized; reversing valve
solenoid 1 is energized, causing reversing valve 1 to
switch position and place Circuit 1 in a Cooling mode flow.
Defrost in Circuit 1 ends when DFT1 opens or defrost
cycle in Circuit 2 is terminated.
Upon initiation of the Emergency Heat sequence, the DFB
will issue output signals at IFO (P3--9) and EHEAT; IFM
will run and electric heaters will be energized.
When space heating load is satisfied, the input signal at
W2 (P2--6) will be removed. Output at EHEAT is removed;
electric heaters are de--energized. After the Fan Delay
period, the signal at IFO (P3--9) is removed; IFM stops.
Demand Controlled Ventilation
If a field--installed sensor is connected to the Economizer
control, a Demand Controlled Ventilation strategy will
operate automatically. As the level in the space increases
above the setpoint (on the Economizer controller), the
minimum position of the dampers will be increased
proportionally, until the Maximum Ventilation setting is
reached. As the space level decreases because of the
increase in fresh air, the outdoor--damper will follow the
higher demand condition from the DCV mode or from the
free--cooling mode.
DCV operation is available in Occupied and Unoccupied
periods with Economizer. However, a control modification
will be required on the RHS unit to implement the
Unoccupied period function.
Supplemental Controls
Compressor Lockout Relay (CLO) – The CLO is available
as a field-installed accessory. Each compressor has a
CLO. The CLO compares the demand for compressor
operation (via a 24-v input from Y at CLO terminal 2) to
operation of the compressor (determined via compressor
current signal input at the CLO s current transformer
loop); if the compressor current signal is lost while the
demand input still exists, the CLO will trip open and
prevent the compressor from restarting until the CLO has
been manually reset. In the lockout condition, 24-v will be
available at terminal X. Reset is accomplished by
removing the input signal at terminal 2; open the
thermostat briefly or cycle the main power to the unit.
Phase Monitor Relay (PMR) – The PMR protects the unit
in the event of a loss of a phase or a reversal of power
line phase in the three-phase unit power supply. In normal
operation, the relay K1 is energized (contact set closed)
and red LED indicator is on steady. If the PMR detects a
loss of a phase or a phase sequence reversal, the relay
K1 is energized, its contact set is opened and unit
operation is stopped; red LED indicator will blink during
lockout condition. Reset of the PMR is automatic when all
phases are restored and phase sequence is correct. If no
24-v control power is available to the PMR, the red LED
will be off.
Defrost cycle is fixed at a maximum 10 minute duration
limit. The period to test and initiate a Defrost cycle can be
selected at 30, 60, 90 or 120 minutes.
Emergency Heat
Emergency Heat is a non--staged heating cycle that uses
the unit’s electric heaters only (no compression heating is
energized). Emergency Heat is initiated when the defrost
board receives an input signal at W2 (P2--6) but there is
no input signal at W1 (P2--7). This signal combination can
be provided by thermostat configuration, manual external
switch selection or by servicer disconnecting the W1 field
connection.
45
FASTENER TORQUE VALUES
See Table 17 for torque values.
Table 17 – Torque Values
Supply fan motor mounting
120 ¦ 12 in---lbs
13.6 ¦ 1.4 Nm
Supply fan motor adjustment plate
120 ¦ 12 in---lbs
13.6 ¦ 1.4 Nm
Motor pulley setscrew
72 ¦ 5 in---lbs
8.1 ¦ 0.6 Nm
Fan pulley setscrew
72 ¦ 5 in---lbs
8.1 ¦ 0.6 Nm
Blower wheel hub setscrew
72 ¦5 in---lbs
8.1 ¦0.6 Nm
Bearing locking collar setscrew
65 to70 in---lbs
7.3 to 7.9 Nm
Compressor mounting bolts
65 to75 in---lbs
7.3 to 7.9 Nm
Condenser fan motor mounting bolts
65 to75 in---lbs
7.3 to 7.9 Nm
Condenser fan motor mounting bolts
20 ¦ 2 in---lbs
2.3 ¦ 0.2 Nm
Condenser fan hub setscrew
84 ¦ 12 in---lbs
9.5 ¦ 1.4 Nm
Motor mount arm
60 ¦ 5 in---lbs
6.8 ¦ 0.5 Nm
Fan wheel hub setscrew
120 ¦ 12 in---lbs
13.6 ¦ 1.4 Nm
Motor belly band bolt
80 ¦ 5 in---lbs
9.0 ¦ 0.6 Nm
036---060 Direct---Drive:
46
APPENDIX I. MODEL NUMBER SIGNIFICANCE
MODEL NUMBER NOMENCLATURE
MODEL SERIES
R
H
S
0
9
0
H
0
A
B
0
A
A
A
Position Number
R = Rooftop
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A = Air Conditioning (Cooling Only)
H = Heat Pump
G = Gas/Electric
Type
S = Standard ASHRAE 90.1--2010 Efficiency
Efficiency
036 = 36,000 = 3 Tons
048 = 48,000 = 4 Tons
060 = 60,000 = 5 Tons
072 = 72,000 = 6 Tons
090 = 90,000 = 7.5 Tons (Dual Compressor)
102 = 102,000 = 8.5 Tons (Dual Compressor)
Nominal Cooling Capacity
K = 208/230--1--60
H = 208/230--3--60
L = 460--3--60
S = 575--3--60
Voltage
0 = No Heat
X = Direct drive X13 Motor (3--5 Ton)
A = Standard Static Option -- Belt Drive (6--8.5 Ton)
B = High Static Option (Belt Drive)
A = None
B = Economizer w/Bara--relief, OA Temp sensor
E = Economizer w/Bara--relief + CO2 Sensor, OA Temp sensor
H = Economizer w/Bara--relief, enthalpy sensor
L = Economizer w/Bara--relief + CO2 Sensor, enthalpy sensor
P = 2--Position damper w/Baro--relief
Heating Capacity
Motor Option
Outdoor Air Options / Control
0A = No Options
4B = Non--Fused Disconnect
AT = Non--powered 115v C.O.
BR = Supply Air Smoke Detector
7C = Non--Fused Disconnect + Non--Powered 115v C.O.
7K = Non--Fused Disconnect + Non--Powered 115v C.O.+ SA Smoke detector
8A = Non--Fused Disconnect + SA Smoke detector
Factory Installed Options
A = Aluminum / Copper Cond & Evap Coil
B = Precoat Alum/CU Cond & Alum / CU Evap
C = E--Coated Alum/Cu Cond & Alum / CU Evap
D = E--Coated Alum / Cu Cond & Evap
F = Copper/Copper Cond & Evap
Condenser / Evaporator Coil Configuration
A = Standard
Unit Packaging
Serial Number Format
POSITION NUMBER
TYPICAL
1
G
POSITION
1
2---3
4---5
6---10
2
0
3
9
4
3
5
5
6
1
7
2
8
3
9
4
10
5
DESIGNATES
Manufacturing location (G = ETP, Texas, USA)
Year of manufacture (“08” = 2008)
Week of manufacture (fiscal calendar)
Sequential number
47
APPENDIX II. PHYSICAL DATA
Physical Data (Cooling)
3 -- 6 TONS
RHS036
1 / 1 / Scroll
9 --- 8 / --42 / ---
RHS060
1 / 1 / Scroll
16 --- 13 / --56 / --630 / 505
27 / 44
Cu / Al
3/8” RTPF
3 / 15
5.5
3/4”
Cu / Al
3/8” RTPF
3 / 15
5.5
3/4”
Cu / Al
3/8” RTPF
4/ 15
7.3
3/4”
Cu / Al
3/8” RTPF
4/ 15
7.3
3/4”
Standard Static
1 phase
1 / 1 / Scroll
1 / 1 / Scroll
10 ---3 / --12 --- 13 / --42 / --42 / --Fixed Orifice
630 / 505
630 / 505
27 / 44
27 / 44
RHS072
Motor Qty / Drive Type
Max BHP
RPM Range
Motor Frame Size
Fan Qty / Type
Fan Diameter x Length (in)
1 / Direct
1
600---1200
48
1 / Centrifugal
10 x 10
1 / Direct
1
600---1200
48
1 / Centrifugal
10 x 10
1 / Direct
1
600---1200
48
1 / Centrifugal
11 x 10
N/A
Standard Static
3 phase
630 / 505
27 / 44
RHS048
Motor Qty / Drive Type
Max BHP
RPM Range
Motor Frame Size
Fan Qty / Type
Fan Diameter x Length (in)
1 / Direct
1
600---1200
48
1 / Centrifugal
10 x 10
1 / Direct
1
600---1200
48
1 / Centrifugal
10 x 10
1 / Direct
1
600---1200
48
1 / Centrifugal
11 x 10
1 / Belt
1.5
878---1192
56
1 / Centrifugal
10 x 10
High Static
3 phase
Refrigeration System
# Circuits / # Comp. / Type
R---410A charge per circuit A/B (lbs---oz)
Oil A/B (oz)
Metering Device
High---pressure Trip / Reset (psig)
Loss of Charge Pressure Trip / Reset (psig)
Evap. Coil
Material
Coil type
Rows / FPI
Total Face Area (ft2)
Condensate Drain Conn. Size
Evap. Fan and Motor
Motor Qty / Drive Type
Max BHP
RPM Range
Motor Frame Size
Fan Qty / Type
Fan Diameter x Length (in)
1 / Belt
2
1035---1466
56
1 / Centrifugal
10 x 10
1 / Belt
2
1035---1466
56
1 / Centrifugal
10 x 10
1 / Belt
2.9
1208---1639
56
1 / Centrifugal
10 x 10
1 / Belt
2.9
1208---1639
56
1 / Centrifugal
10 x 10
Cu / Al
3/8” RTPF*
2 / 17
10.7
Cu / Al
3/8” RTPF*
2 / 17
12.7118055
Cu / Al
3/8” RTPF*
2 / 17
15
Cu / Al
3/8” RTPF*
2 / 17
21.25
1 / direct
1/8 / 825
22
1 / direct
1/4 / 1100
22
1 / direct
1/4 / 1100
22
1 / direct
1/4 / 1100
22
2 / 16 x 25 x 2
1 / 20 x 24 x 1
2 / 16 x 25 x 2
1 / 20 x 24 x 1
4 / 16 x 16 x 2
1 / 20 x 24 x 1
4 / 16 x 16 x 2
1 / 20 x 24 x 1
Cond. Coil
Material
Coil type
Rows / FPI
Total Face Area (ft2)
Cond. fan / motor
Qty / Motor Drive Type
Motor HP / RPM
Fan diameter (in)
Filters
RA Filter # / Size (in)
OA inlet screen # / Size (in)
* RTPF = Round tube plate fin coil design.
48
APPENDIX II. PHYSICAL DATA (cont.)
Physical Data (Cooling)
7.5 -- 8.5 TONS
RHS090
RHS102
2 / 2 / Scroll
10 --- 3 / 10 --- 3
42 / 42
2 / 2 / Scroll
11 --- 2 / 11 --- 2
42 / 42
Refrigeration System
630 / 505
27 / 44
Cu / Al
3/8” RTPF
3 / 15
11.1
3/4”
Cu / Al
3/8” RTPF
4 / 15
11.1
3/4”
Standard Static
3 phase
Fixed Orifice
630 / 505
27 / 44
Motor Qty / Drive Type
Max BHP
RPM Range
Motor Frame Size
Fan Qty / Type
Fan Diameter x Length (in)
1 / Belt
1.2
460---652
56
1 / Centrifugal
15 x 15
1 / Belt
1.2
460---652
56
1 / Centrifugal
15 x 15
High Static
3 phase
# Circuits / # Comp. / Type
R---410A refrig. charge per circuit A/B (lbs---oz)
Oil A/B (oz)
Metering Device
High---pressure Trip / Reset (psig)
Loss of Charge Pressure Trip / Reset (psig)
Motor Qty / Drive Type
Max BHP
RPM Range
Motor Frame Size
Fan Qty / Type
Fan Diameter x Length (in)
1 / Belt
2.9
838---1084
56
1 / Centrifugal
15 x 15
1 / Belt
2.9
838---1084
56
1 / Centrifugal
15 x 15
Material
Coil type
Rows / FPI
Total Face Area (ft2)
Cu / Al
3/8” RTPF*
2 / 17
25.1
Cu / Al
3/8” RTPF*
2 / 17
25.1
Qty / Motor Drive Type
Motor HP / RPM
Fan diameter (in)
2 / direct
1/4 / 1100
22.0
2 / direct
1/4 / 1100
22.0
4 / 16 x 20 x 2
1 / 20 x 24 x 1
4 / 20 x 20 x 2
1 / 20 x 24 x 1
Evap. Coil
Material
Coil type
Rows / FPI
Total Face Area (ft2)
Condensate Drain Conn. Size
Evap. Fan and Motor
Cond. Coil
Cond. fan / motor
Filters
RA Filter # / Size (in)
OA inlet screen # / Size (in)
* RTPF = Round tube plate fin coil design.
APPENDIX III. FAN PERFORMANCE
General Fan Performance Notes:
1. Interpolation is permissible. Do not extrapolate.
2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static
pressure caused by any FIOPs or accessories.
3. Tabular data accounts for pressure loss due to clean filters, unit casing, and wet coils. Factory options and
accessories may add static pressure losses.
4. The Fan Performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would
work, we recommended the lower horsepower option.
5. For information on the electrical properties of motors, please see the Electrical information section of this book.
49
APPENDIX III. FAN PERFORMANCE
Table 18 – RHS036, ELECTRIC DRIVE,
X13 MOTOR, 3 TON HORIZONTAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
50
CFM
ESP
BHP
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
0.70
0.60
0.50
0.39
0.29
0.21
0.12
0.03
--0.85
0.76
0.66
0.55
0.46
0.36
0.27
0.17
0.07
1.02
0.94
0.86
0.79
0.71
0.61
0.51
0.40
0.29
1.12
1.06
1.00
0.95
0.89
0.80
0.70
0.57
0.46
1.18
1.14
1.10
1.06
1.02
0.98
0.94
0.90
0.87
0.31
0.30
0.29
0.27
0.26
0.24
0.23
0.21
--0.37
0.36
0.36
0.34
0.34
0.32
0.31
0.29
0.27
0.44
0.45
0.45
0.45
0.45
0.44
0.43
0.41
0.39
0.49
0.50
0.52
0.53
0.54
0.53
0.52
0.50
0.49
0.52
0.54
0.56
0.58
0.60
0.63
0.65
0.68
0.71
Table 19 – RHS036, ELECTRIC DRIVE,
X13 MOTOR, 3 TON VERTICAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
CFM
ESP
BHP
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
900
975
1050
1125
1200
1275
1350
1425
1500
0.44
0.35
0.24
0.15
0.08
0.02
------0.64
0.53
0.42
0.32
0.24
0.15
0.07
----0.93
0.80
0.68
0.57
0.47
0.35
0.26
0.13
0.08
1.04
0.92
0.80
0.71
0.62
0.52
0.43
0.27
0.22
1.10
1.00
0.90
0.82
0.75
0.70
0.67
0.60
0.62
0.22
0.21
0.20
0.19
0.19
0.18
------0.30
0.29
0.28
0.27
0.26
0.25
0.24
----0.42
0.41
0.39
0.38
0.37
0.36
0.34
0.33
0.32
0.47
0.46
0.45
0.45
0.45
0.44
0.44
0.42
0.41
0.50
0.49
0.49
0.50
0.51
0.54
0.57
0.60
0.64
FAN PERFORMANCE
Table 20 – RHS048, ELECTRIC DRIVE,
X13 MOTOR, 4 TON HORIZONTAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
CFM
ESP
BHP
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.75
0.63
0.48
0.33
0.19
0.05
------0.97
0.88
0.77
0.64
0.50
0.36
0.21
0.06
--0.98
0.91
0.82
0.71
0.58
0.45
0.31
0.16
0.03
0.98
0.92
0.86
0.79
0.70
0.62
0.52
0.37
0.21
1.02
0.97
0.92
0.87
0.82
0.77
0.71
0.65
0.58
0.48
0.46
0.44
0.41
0.39
0.36
------0.58
0.59
0.59
0.59
0.57
0.54
0.52
0.49
--0.59
0.60
0.62
0.62
0.61
0.60
0.58
0.56
0.52
0.59
0.62
0.64
0.66
0.68
0.70
0.71
0.69
0.67
0.60
0.64
0.67
0.71
0.75
0.79
0.84
0.88
0.92
Table 21 – RHS048, ELECTRIC DRIVE,
X13 MOTOR, 4 TON VERTICAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
CFM
ESP
BHP
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.50
0.36
0.19
0.10
0.02
--------0.80
0.69
0.50
0.38
0.24
0.13
0.01
----0.89
0.78
0.59
0.46
0.31
0.20
0.07
----0.89
0.80
0.67
0.57
0.43
0.31
0.23
0.12
0.01
0.94
0.85
0.73
0.65
0.55
0.47
0.42
0.39
0.38
0.39
0.37
0.35
0.33
0.32
--------0.55
0.55
0.54
0.52
0.50
0.48
0.46
----0.59
0.61
0.60
0.58
0.56
0.54
0.52
----0.60
0.63
0.64
0.65
0.65
0.66
0.65
0.63
0.62
0.62
0.65
0.68
0.70
0.72
0.75
0.78
0.82
0.88
51
FAN PERFORMANCE
Table 22 – RHS060, ELECTRIC DRIVE,
X13 MOTOR, 5 TON HORIZONTAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
52
CFM
ESP
BHP
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1.19
1.01
0.82
0.60
0.38
0.16
------1.40
1.25
1.08
0.90
0.67
0.44
0.20
----1.41
1.28
1.13
0.96
0.74
0.51
0.27
0.02
--1.44
1.35
1.24
1.11
0.90
0.69
0.43
0.17
--1.49
1.38
1.28
1.18
1.11
0.97
0.72
0.47
0.20
0.74
0.73
0.70
0.66
0.62
0.57
------0.86
0.88
0.86
0.84
0.80
0.75
0.71
----0.87
0.89
0.89
0.88
0.85
0.80
0.75
0.70
--0.89
0.93
0.96
0.98
0.96
0.92
0.86
0.81
--0.90
0.95
1.00
1.05
1.09
1.11
1.07
1.02
0.96
Table 23 – RHS060, ELECTRIC DRIVE,
X13 MOTOR, 5 TON VERTICAL SUPPLY
SPEED
(TORQUE)
TAP
1
2
3
4
5
CFM
ESP
BHP
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1500
1625
1750
1875
2000
2125
2250
2375
2500
1.00
0.72
0.46
0.28
0.14
0.00
------1.18
1.00
0.75
0.51
0.30
0.13
------1.19
1.03
0.80
0.56
0.35
0.19
0.01
----1.25
1.09
0.89
0.65
0.45
0.26
0.12
----1.26
1.16
0.99
0.80
0.67
0.48
0.26
0.11
---
0.70
0.65
0.60
0.55
0.51
0.52
------0.88
0.90
0.87
0.83
0.79
0.75
------0.88
0.91
0.90
0.87
0.83
0.80
0.77
----0.89
0.93
0.96
0.94
0.93
0.89
0.86
----0.90
0.96
1.01
1.05
1.07
1.07
1.03
1.00
---
APPENDIX III. FAN PERFORMANCE (cont.)
Table 24 – RHS036, 3 TON HORIZONTAL SUPPLY, 3 PHASE BELT DRIVE
CFM
900
975
1050
1125
1200
1275
1350
1425
1500
0.2
RPM
574
597
621
646
671
696
723
749
776
BHP
0.13
0.15
0.18
0.20
0.23
0.26
0.30
0.34
0.38
RPM
707
727
747
768
790
812
835
859
883
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.23
817
0.34
913
0.25
835
0.37
929
0.28
853
0.40
946
0.31
872
0.43
964
0.34
892
0.47
982
0.38
912
0.51
1001
0.42
933
0.55
1020
0.46
955
0.60
1040
0.51
977
0.65
1061
BHP
0.47
0.50
0.53
0.57
0.61
0.65
0.70
0.75
0.80
RPM
999
1015
1030
1047
1064
1082
1100
1119
1138
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
0.93
1220
1.11
1284
0.97
1233
1.15
1297
1.01
1247
1.19
1311
1.05
1261
1.23
1325
1.10
1276
1.28
1339
1.15
1292
1.33
1354
1.20
1308
1.39
1370
1.26
1325
1.45
1386
1.33
1342
1.52
1403
BHP
1.30
1.33
1.38
1.42
1.47
1.53
1.59
1.65
1.72
RPM
1346
1358
1371
1385
1399
1414
1429
1444
1461
1.0
BHP
0.61
0.64
0.68
0.72
0.76
0.81
0.86
0.91
0.97
Med static --- 819 to 1251 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
CFM
900
975
1050
1125
1200
1275
1350
1425
1500
1.2
RPM
1078
1093
1108
1123
1140
1157
1174
1192
1210
BHP
0.77
0.80
0.84
0.88
0.92
0.97
1.02
1.08
1.14
RPM
1151
1165
1180
1195
1210
1226
1243
1260
1278
2.0
BHP
1.49
1.53
1.58
1.62
1.68
1.73
1.80
1.86
1.93
Med static --- 819 to 1251 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
Table 25 – RHS036, 3 TON VERTICAL SUPPLY, 3 PHASE BELT DRIVE
CFM
0.2
RPM
BHP
RPM
900
594
0.15
740
975
618
0.17
758
1050
642
0.19
777
1125
668
0.22
797
1200
695
0.25
818
1275
722
0.29
841
1350
750
0.33
864
1425
778
0.37
888
1500
807
0.42
913
Med static --- 819 to 1251 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
CFM
900
975
1050
1125
1200
1275
1350
1425
1500
1.2
RPM
1180
1186
1194
1204
1215
1227
1240
1254
1270
BHP
0.86
0.89
0.92
0.97
1.01
1.06
1.12
1.18
1.24
RPM
1269
1275
1281
1289
1298
1309
1321
1333
1347
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.25
867
0.37
981
0.28
881
0.40
991
0.30
896
0.43
1003
0.34
912
0.47
1017
0.37
930
0.51
1032
0.41
949
0.55
1048
0.46
968
0.60
1065
0.50
989
0.65
1083
0.56
1011
0.71
1103
BHP
0.52
0.55
0.58
0.62
0.66
0.71
0.76
0.81
0.87
RPM
1084
1092
1102
1113
1126
1140
1155
1171
1188
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.05
1354
1.25
1434
1.08
1358
1.29
1437
1.12
1363
1.32
1441
1.16
1370
1.37
1447
1.21
1378
1.42
1454
1.26
1387
1.47
1462
1.32
1397
1.53
1471
1.38
1409
1.59
1481
1.45
1421
1.66
1492
BHP
1.47
1.51
1.54
1.59
1.64
1.69
1.75
1.82
1.89
RPM
1511
1513
1516
1520
1526
1533
1541
-----
1.0
BHP
0.68
0.71
0.75
0.79
0.83
0.88
0.93
0.99
1.05
2.0
BHP
1.70
1.74
1.78
1.82
1.87
1.92
1.99
-----
Med static --- 819 to 1251 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
Bold Face indicates field---supplied drive
1.Recommend using field---supplied fan pulley (part no. 1178447), motor pulley (part no. 1070551) and belt (part no.1178129).
53
FAN PERFORMANCE (cont.)
Table 26 – RHS048, 4 TON HORIZONTAL SUPPLY, 3 PHASE BELT DRIVE
CFM
0.2
RPM
BHP
RPM
1200
671
0.23
790
1300
705
0.28
820
1400
740
0.33
851
1500
776
0.38
883
1600
813
0.45
916
1700
851
0.52
949
1800
888
0.60
984
1900
927
0.69
1019
2000
965
0.78
1054
Med static --- 920 to 1303 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
CFM
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.34
892
0.47
982
0.39
919
0.52
1007
0.45
947
0.58
1034
0.51
977
0.65
1061
0.58
1007
0.73
1089
0.66
1038
0.81
1118
0.75
1069
0.90
1148
0.84
1102
1.00
1179
0.94
1135
1.11
1210
1.0
BHP
0.61
0.67
0.73
0.80
0.89
0.97
1.07
1.18
1.29
RPM
1064
1088
1113
1138
1165
1192
1221
1250
1280
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.10
1276
1.28
1339
1.16
1297
1.35
1360
1.24
1319
1.43
1381
1.33
1342
1.52
1403
1.42
1365
1.62
1425
1.52
1390
1.72
1449
1.63
1415
1.84
1473
1.75
1441
1.96
1498
1.88
1467
2.10
1524
1.2
BHP
0.76
0.82
0.89
0.97
1.05
1.15
1.25
1.36
1.48
2.0
RPM
BHP
RPM
BHP
RPM
1200
1140
0.92
1210
1.47
1399
1300
1162
0.99
1232
1.55
1419
1400
1186
1.06
1254
1.63
1439
1500
1210
1.14
1278
1.72
1461
1600
1236
1.23
1302
1.82
1483
1700
1262
1.33
1328
1.93
1505
1800
1289
1.44
1354
2.05
1529
1900
1317
1.55
1380
2.18
--2000
1345
1.68
1408
2.32
--Med static --- 920 to 1303 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
Bold Face indicates field---supplied drive
1.Recommend using field---supplied fan pulley (part no. 1178447), motor pulley (part no. 1070551) and belt (part no.1178129).
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
BHP
1.68
1.75
1.84
1.93
2.04
2.15
2.27
-----
Table 27 – RHS048, 4 TON VERTICAL SUPPLY, 3 PHASE BELT DRIVE
CFM
0.2
RPM
BHP
RPM
1200
695
0.25
818
1300
731
0.30
849
1400
769
0.36
880
1500
807
0.42
913
1600
847
0.49
948
1700
887
0.57
983
1800
928
0.66
1020
1900
969
0.76
1057
2000
1010
0.87
1095
Med static --- 920 to 1303 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
CFM
1.2
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.37
930
0.51
1032
0.43
955
0.57
1053
0.49
982
0.63
1077
0.56
1011
0.71
1103
0.63
1042
0.79
1130
0.72
1073
0.88
1158
0.82
1106
0.98
1188
0.92
1140
1.09
1219
1.04
1175
1.21
1251
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.21
1378
1.42
1454
1.28
1390
1.49
1465
1.36
1405
1.57
1478
1.45
1421
1.66
1492
1.54
1440
1.76
1509
1.65
1459
1.88
1527
1.77
1481
2.00
--1.90
1504
2.13
--2.04
1528
2.28
---
1.0
BHP
0.66
0.72
0.79
0.87
0.96
1.06
1.16
1.28
1.41
RPM
1126
1145
1166
1188
1213
1239
1266
1295
1325
RPM
BHP
RPM
BHP
RPM
1200
1215
1.01
1298
1.64
1526
1300
1231
1.08
1313
1.71
1536
1400
1249
1.16
1329
1.79
--1500
1270
1.24
1347
1.89
--1600
1292
1.34
1367
1.99
--1700
1315
1.44
1389
2.11
--1800
1341
1.56
1412
----1900
1367
1.68
1437
----2000
1395
1.82
1463
----Med static --- 920 to 1303 rpm, 1.5 max bhp
High static --- 1035 to 1466 rpm, 2.0 max bhp
Bold Face indicates field---supplied drive
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.Recommend using field---supplied fan pulley (part no. 1178447), motor pulley (part no. 1070551) and belt (part no.1178129).
54
BHP
0.83
0.89
0.97
1.05
1.14
1.24
1.35
1.48
1.61
2.0
BHP
1.87
1.94
---------------
FAN PERFORMANCE (cont.)
Table 28 – RHS060, 5 TON HORIZONTAL SUPPLY, 3 PHASE BELT DRIVE
CFM
0.2
RPM
BHP
RPM
1500
725
0.33
840
1625
765
0.40
876
1750
806
0.48
912
1875
847
0.57
950
2000
889
0.66
988
2125
931
0.78
1027
2250
974
0.90
1067
2375
1018
1.03
1107
2500
1061
1.19
1148
Med static --- 1066 to 1380 rpm, 2.0 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
CFM
1.2
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.46
937
0.60
1023
0.54
970
0.68
1054
0.63
1004
0.78
1087
0.72
1039
0.88
1120
0.83
1075
1.00
1154
0.95
1112
1.13
1189
1.08
1149
1.27
1224
1.23
1187
1.43
1261
1.39
1226
1.59
1297
BHP
0.75
0.84
0.94
1.05
1.18
1.31
1.46
1.63
1.81
RPM
1101
1131
1162
1194
1226
1260
1294
1329
1364
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.23
1302
1.40
1361
1.34
1329
1.52
1388
1.46
1358
1.65
1416
1.60
1387
1.79
1445
1.74
1417
1.95
1474
1.90
1447
2.11
1504
2.08
1479
2.29
1534
2.27
1511
2.49
1566
2.47
1543
2.70
1597
BHP
1.58
1.71
1.84
1.99
2.15
2.33
2.51
2.72
2.94
RPM
1418
1444
1472
1499
1528
1557
1587
1618
1649
RPM
BHP
RPM
1500
1172
1.06
1239
1625
1201
1.16
1267
1750
1231
1.28
1296
1875
1262
1.41
1326
2000
1294
1.55
1357
2125
1326
1.70
1388
2250
1359
1.87
1420
2375
1393
2.05
1453
2500
1427
2.24
1487
Med static --- 1066 to 1380 rpm, 2.0 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.0
BHP
0.90
1.00
1.11
1.23
1.36
1.50
1.66
1.84
2.02
2.0
BHP
1.77
1.90
2.04
2.20
2.36
2.55
2.74
2.95
3.18
Table 29 – RHS060, 5 TON VERTICAL SUPPLY, 3 PHASE BELT DRIVE
CFM
0.2
RPM
BHP
RPM
1500
794
0.41
902
1625
840
0.49
945
1750
888
0.59
988
1875
936
0.70
1033
2000
984
0.82
1078
2125
1033
0.96
1124
2250
1083
1.11
1170
2375
1133
1.28
1217
2500
1183
1.47
1265
Med static --- 1066 to 1380 rpm, 2.0 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
CFM
1.2
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.55
993
0.69
1074
0.64
1034
0.80
1113
0.75
1075
0.92
1153
0.87
1117
1.05
1193
1.00
1160
1.19
1235
1.15
1204
1.35
1277
1.32
1248
1.53
1319
1.50
1293
1.72
1363
1.70
1339
1.93
1406
BHP
0.85
0.96
1.09
1.23
1.39
1.56
1.74
1.95
2.17
RPM
1147
1185
1223
1263
1303
1343
1385
1427
1470
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.33
1336
1.50
1392
1.47
1371
1.65
1427
1.63
1407
1.81
1462
1.80
1444
1.99
1498
1.98
1482
2.19
1535
2.18
1520
2.40
1573
2.40
1559
2.62
1611
2.63
1598
2.87
1650
2.89
1638
3.13
---
BHP
1.67
1.83
2.01
2.19
2.40
2.62
2.85
3.11
---
RPM
1445
1479
1514
1550
1586
1623
1661
-----
RPM
BHP
RPM
1500
1214
1.16
1277
1625
1251
1.30
1313
1750
1289
1.44
1350
1875
1327
1.60
1387
2000
1366
1.78
1426
2125
1406
1.97
1464
2250
1446
2.18
1504
2375
1487
2.40
1544
2500
1529
2.64
1585
Med static --- 1066 to 1380 rpm, 2.0 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.0
BHP
1.00
1.13
1.26
1.41
1.58
1.76
1.96
2.17
2.41
2.0
BHP
1.85
2.02
2.20
2.40
2.61
2.84
3.09
-----
55
FAN PERFORMANCE (cont.)
Table 30 – RHS072, 6 TON HORIZONTAL SUPPLY
CFM
0.2
RPM
BHP
RPM
1800
822
0.51
927
1950
872
0.62
973
2100
923
0.75
1019
2250
974
0.90
1067
2400
1026
1.06
1115
2550
1079
1.25
1164
2700
1132
1.46
1214
2850
1186
1.69
1264
3000
1240
1.94
1315
Std static --- 878 to 1192 rpm, 1.5 max bhp
Med static --- 1066 to 1380 rpm, 2.9 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
CFM
1.2
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.66
1018
0.82
1100
0.79
1061
0.95
1140
0.92
1104
1.10
1182
1.08
1149
1.27
1224
1.26
1195
1.46
1268
1.46
1241
1.67
1312
1.67
1289
1.90
1358
1.92
1336
2.15
1404
2.18
1385
2.43
1451
BHP
0.98
1.13
1.29
1.46
1.66
1.88
2.12
2.39
2.68
RPM
1174
1213
1253
1294
1336
1379
1422
1467
1512
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.51
1369
1.70
1427
1.68
1405
1.88
1462
1.87
1441
2.08
1498
2.08
1479
2.29
1534
2.31
1517
2.53
1572
2.55
1557
2.79
1610
2.83
1597
3.07
1650
3.12
1638
3.37
--3.44
1680
3.70
---
BHP
1.90
2.09
2.29
2.51
2.76
3.03
3.32
-----
RPM
1483
1517
1552
1587
1624
1662
-------
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.80
1092
0.97
1169
0.95
1143
1.13
1218
1.12
1195
1.32
1268
1.32
1248
1.53
1319
1.54
1302
1.76
1371
1.78
1357
2.02
1424
2.06
1412
2.31
1478
2.36
1469
2.62
1532
2.69
1525
2.97
1587
BHP
1.14
1.32
1.52
1.74
1.99
2.26
2.56
2.89
3.25
RPM
1239
1287
1335
1385
1435
1487
1539
1592
1646
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.69
1422
1.88
1477
1.91
1467
2.11
1520
2.14
1512
2.35
1565
2.40
1559
2.62
1611
2.68
1606
2.92
1658
2.99
1654
3.24
--3.33
-----------------------
BHP
2.08
2.31
2.57
2.85
3.16
---------
RPM
1528
1572
1616
1661
-----------
RPM
BHP
RPM
1800
1244
1.33
1308
1950
1281
1.49
1345
2100
1320
1.67
1382
2250
1359
1.87
1420
2400
1400
2.09
1460
2550
1441
2.33
1500
2700
1483
2.59
1541
2850
1527
2.87
1583
3000
1571
3.18
1626
Std static --- 878 to 1192 rpm, 1.5 max bhp
Med static --- 1066 to 1380 rpm, 2.9 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.0
BHP
1.15
1.31
1.48
1.66
1.87
2.10
2.35
2.63
2.93
2.0
BHP
2.10
2.30
2.51
2.74
2.99
3.27
-------
Table 31 – RHS072, 6 TON VERTICAL SUPPLY
CFM
0.2
RPM
BHP
RPM
1800
907
0.63
1006
1950
965
0.77
1060
2100
1024
0.93
1115
2250
1083
1.11
1170
2400
1143
1.32
1227
2550
1203
1.55
1284
2700
1264
1.81
1342
2850
1326
2.09
1400
3000
1387
2.41
1459
Std static --- 878 to 1192 rpm, 1.5 max bhp
Med static --- 1066 to 1380 rpm, 2.9 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
CFM
1.2
RPM
BHP
RPM
1800
1304
1.51
1365
1950
1350
1.71
1410
2100
1398
1.93
1457
2250
1446
2.18
1504
2400
1496
2.45
1552
2550
1546
2.75
1601
2700
1597
3.07
1651
2850
1648
3.43
--3000
------Std static --- 878 to 1192 rpm, 1.5 max bhp
Med static --- 1066 to 1380 rpm, 2.9 max bhp
High static --- 1208 to 1639 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
56
1.0
BHP
1.32
1.51
1.72
1.96
2.22
2.50
2.82
3.16
3.53
2.0
BHP
2.28
2.52
2.79
3.09
-----------
FAN PERFORMANCE (cont.)
Table 32 – RHS090, 7.5 TON HORIZONTAL SUPPLY
CFM
0.2
RPM
BHP
RPM
2250
423
0.28
509
2438
444
0.34
525
2625
465
0.40
543
2813
487
0.47
561
3000
510
0.55
580
3188
534
0.65
600
3375
557
0.75
621
3563
582
0.86
642
3750
606
0.99
664
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
CFM
1.2
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.40
587
0.52
659
0.46
600
0.59
669
0.53
614
0.67
680
0.61
629
0.76
693
0.70
646
0.86
707
0.80
663
0.96
722
0.91
681
1.08
738
1.03
700
1.21
755
1.17
720
1.35
773
BHP
0.66
0.73
0.82
0.91
1.02
1.13
1.26
1.39
1.54
RPM
725
733
743
753
765
779
793
808
824
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.09
903
1.25
957
1.19
907
1.36
959
1.30
911
1.47
963
1.41
917
1.59
967
1.54
925
1.72
974
1.68
933
1.87
981
1.82
943
2.02
990
1.98
954
2.19
1000
2.15
966
2.36
1011
BHP
1.41
1.52
1.64
1.77
1.91
2.06
2.22
2.40
2.58
RPM
1009
1010
1012
1016
1021
1028
1035
1044
1054
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.43
597
0.54
658
0.50
615
0.62
675
0.58
634
0.71
692
0.67
653
0.82
710
0.77
673
0.93
729
0.89
694
1.05
749
1.01
716
1.19
769
1.15
737
1.33
789
1.30
760
1.49
810
BHP
0.66
0.75
0.85
0.96
1.08
1.21
1.36
1.52
1.68
RPM
713
729
745
763
780
799
818
837
857
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.02
856
1.14
899
1.13
870
1.26
912
1.26
885
1.40
926
1.40
900
1.55
941
1.55
916
1.70
956
1.71
932
1.87
972
1.88
949
2.05
988
2.06
966
2.25
1005
2.26
984
2.45
1022
BHP
1.26
1.40
1.54
1.69
1.86
2.04
2.23
2.43
2.65
RPM
939
952
966
980
995
1010
1026
1042
1059
RPM
BHP
RPM
2250
788
0.94
847
2438
794
1.03
852
2625
802
1.13
858
2813
811
1.24
865
3000
821
1.36
874
3188
832
1.49
884
3375
845
1.63
895
3563
858
1.78
907
3750
873
1.94
920
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.0
BHP
0.80
0.88
0.97
1.08
1.19
1.31
1.44
1.58
1.74
2.0
BHP
1.58
1.70
1.82
1.96
2.11
2.26
2.43
2.61
2.80
Table 33 – RHS090, 3 PHASE, 7.5 TON VERTICAL SUPPLY
CFM
0.2
RPM
BHP
RPM
2250
447
0.31
528
2438
470
0.37
548
2625
494
0.45
569
2813
518
0.53
590
3000
543
0.62
612
3188
568
0.72
635
3375
593
0.84
658
3563
619
0.97
681
3750
645
1.11
705
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
CFM
1.2
RPM
BHP
RPM
2250
764
0.89
812
2438
779
1.00
826
2625
795
1.12
841
2813
811
1.25
857
3000
828
1.39
873
3188
846
1.54
890
3375
864
1.70
907
3563
882
1.88
925
3750
902
2.07
944
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
1.0
BHP
0.78
0.88
0.99
1.11
1.24
1.38
1.53
1.70
1.88
2.0
BHP
1.39
1.53
1.68
1.84
2.02
2.21
2.40
2.62
2.84
57
FAN PERFORMANCE (cont.)
Table 34 – RHS102, 8.5 TON HORIZONTAL SUPPLY
CFM
2550
2763
2975
3188
3400
3613
3825
4038
4250
RPM
546
567
589
613
637
662
688
714
741
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.52
618
0.66
684
0.61
635
0.76
699
0.72
654
0.87
716
0.83
675
1.00
733
0.96
696
1.14
752
1.11
719
1.29
773
1.27
742
1.46
794
1.45
766
1.65
816
1.65
790
1.86
838
BHP
0.80
0.91
1.03
1.17
1.31
1.48
1.66
1.85
2.07
RPM
747
760
774
789
806
824
843
864
885
RPM
863
871
882
894
907
922
938
955
973
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.28
916
1.45
968
1.41
924
1.59
974
1.55
932
1.74
981
1.71
943
1.90
990
1.88
955
2.09
1001
2.07
968
2.28
1013
2.28
983
2.49
1027
2.50
999
2.72
1041
2.74
1015
2.97
1057
BHP
1.62
1.77
1.93
2.10
2.29
2.49
2.71
2.95
3.21
RPM
1018
1022
1028
1036
1046
1057
1069
1083
1097
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.4
0.6
0.8
BHP
RPM
BHP
RPM
0.56
634
0.70
693
0.67
657
0.81
714
0.79
681
0.94
736
0.92
705
1.08
759
1.07
730
1.24
782
1.23
756
1.42
806
1.42
782
1.61
831
1.62
809
1.83
857
1.84
836
2.06
883
BHP
0.83
0.95
1.09
1.25
1.42
1.60
1.81
2.03
2.28
RPM
746
766
787
808
831
854
877
901
926
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.4
1.6
1.8
BHP
RPM
BHP
RPM
1.23
885
1.36
926
1.38
902
1.53
943
1.55
921
1.71
961
1.74
940
1.90
979
1.94
960
2.12
998
2.16
980
2.34
1018
2.40
1001
2.59
1039
2.65
1023
2.86
1060
2.93
1045
3.15
1081
BHP
1.50
1.68
1.86
2.07
2.29
2.53
2.79
3.07
3.36
RPM
965
982
999
1017
1036
1055
1075
1096
1117
0.2
RPM
468
493
520
547
575
603
631
660
689
BHP
0.39
0.47
0.57
0.68
0.80
0.94
1.09
1.26
1.45
1.0
BHP
0.96
1.07
1.20
1.34
1.50
1.67
1.86
2.06
2.29
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
CFM
2550
2763
2975
3188
3400
3613
3825
4038
4250
1.2
RPM
806
817
829
843
858
874
891
910
930
BHP
1.11
1.24
1.37
1.53
1.69
1.87
2.07
2.28
2.51
2.0
BHP
1.80
1.95
2.12
2.30
2.50
2.71
2.94
3.19
3.45
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
Table 35 – RHS102, 8.5 TON VERTICAL SUPPLY
CFM
0.2
RPM
BHP
RPM
2550
495
0.43
570
2763
524
0.53
595
2975
552
0.63
620
3188
582
0.76
647
3400
611
0.89
674
3613
641
1.05
701
3825
672
1.22
729
4038
702
1.41
758
4250
733
1.62
787
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
CFM
2550
2763
2975
3188
3400
3613
3825
4038
4250
1.2
RPM
795
814
834
855
876
898
921
944
968
BHP
1.09
1.24
1.40
1.57
1.76
1.97
2.20
2.45
2.71
RPM
841
859
878
898
919
940
962
984
1007
Std static --- 460 to 652 rpm, 1.2 max bhp
Med static --- 591 to 838 rpm, 2.9 max bhp
High static --- 838 to 1085 rpm, 2.9 max bhp
NOTE: For Medium static applications order high static model and use field---supplied pulley and drives.
58
1.0
BHP
0.96
1.09
1.24
1.41
1.59
1.79
2.00
2.24
2.49
2.0
BHP
1.64
1.82
2.02
2.24
2.47
2.72
2.99
3.27
3.58
APPENDIX III. FAN PERFORMANCE (cont.)
Table 36 – PULLEY ADJUSTMENT
UNIT
RHS
PHASE
036
3
048
3
060
3
072
3
090
3
102
3
MOTOR/DRIVE
COMBO
Medium Static*
High Static
Medium Static*
High Static
Medium Static*
High Static
Standard Static
Medium Static*
High Static
Standard Static
Medium Static*
High Static
Standard Static
Medium Static*
High Static
0
1251
1466
1303
1466
1380
1639
1192
1380
1639
652
838
1084
652
838
1084
0.5
1208
1423
1265
1423
1349
1596
1161
1349
1596
633
813
1059
633
813
1059
1
1165
1380
1226
1380
1317
1553
1129
1317
1553
614
789
1035
614
789
1035
MOTOR PULLEY TURNS OPEN
1.5
2
2.5
3
3.5
1121 1078 1035
992
949
1337 1294 1251 1207
1164
1188
1150
1112
1073 1035
1337 1294 1251 1207
1164
1286 1254 1223
1192
1160
1510 1467 1424 1380 1337
1098 1066 1035 1004
972
1286 1254 1223
1192
1160
1510 1467 1424 1380 1337
594
575
556
537
518
764
739
715
690
665
1010
986
961
936
912
594
575
556
537
518
764
739
715
690
665
1010
986
961
936
912
4
905
1121
997
1121
1129
1294
941
1129
1294
498
640
887
498
640
887
4.5
862
1078
958
1078
1097
1251
909
1097
1251
479
616
863
479
616
863
5
819
1035
920
1035
1066
1208
878
1066
1208
460
591
838
460
591
838
NOTE: Do not adjust pulley further than 5 turns open.
--- Factory settings
* Available with the high static fan motor option and field supplied drives available from FAST
59
APPENDIX IV. ELECTRICAL INFORMATION
Table 37 – RHS036, 3 TONS........1--Stage Cooling
VOLTAGE
RANGE
COMP (ea)
OFM (ea)
V--Ph--Hz
208--1--60
230--1--60
MIN
187
187
MAX
253
253
RLA
17.9
17.9
LRA
112
112
WATTS
190
190
FLA
0.9
0.9
208--3--60
187
253
13.2
88
190
0.9
230--3--60
187
253
13.2
88
190
0.9
460--3--60
414
506
6.0
44
190
0.5
575--3--60
518
633
NA
NA
190
0.4
TYPE
DD--STD
DD--STD
DD--STD
HIGH
DD--STD
HIGH
DD--STD
HIGH
DD--STD
HIGH
Max
WATTS
980
980
980
2000
980
2000
980
2000
980
2000
IFM
Max
AMP Draw
7.8
7.8
7.8
5.5
7.8
5.5
8.0
2.7
4.2
2.1
EFF at Full Load
84%
84%
84%
80%
84%
80%
84%
80%
84%
80%
FLA
7.4
7.4
7.4
5.2
7.4
5.2
7.6
2.6
4.0
2.0
EFF at Full Load
84%
84%
84%
80%
84%
80%
84%
80%
84%
80%
FLA
7.4
7.4
7.4
5.2
7.4
5.2
7.6
2.6
4.0
2.0
EFF at Full Load
84%
84%
84%
81%
84%
81%
84%
81%
84%
81%
FLA
7.4
7.4
7.4
7.5
7.4
7.5
7.6
3.4
4.0
2.8
Table 38 – RHS048, 4 TONS........1--Stage Cooling
VOLTAGE
RANGE
COMP (ea)
OFM (ea)
V--Ph--Hz
208--1--60
230--1--60
MIN
MAX
187
187
253
253
RLA
21.8
21.8
LRA
117
117
WATTS
325
325
FLA
1.5
1.5
208--3--60
187
253
13.7
83
325
1.5
230--3--60
187
253
13.7
83
325
1.5
460--3--60
414
506
6.2
41
325
0.8
575--3--60
518
633
4.8
37
325
0.6
TYPE
DD---STD
DD---STD
DD---STD
HIGH
DD---STD
HIGH
DD---STD
HIGH
DD---STD
HIGH
Max
WATTS
980
980
980
2000
980
2000
980
2000
980
2000
IFM
Max
AMP Draw
7.8
7.8
7.8
5.5
7.8
5.5
8.0
2.7
4.2
2.1
Table 39 – RHS060, 5 TONS........1--Stage Cooling
VOLTAGE
RANGE
COMP (ea)
OFM (ea)
V--Ph--Hz
208--1--60
230--1--60
MIN
187
187
MAX
253
253
RLA
26.2
26.2
LRA
134
134
WATTS
325
325
FLA
1.5
1.5
208--3--60
187
253
15.6
110
325
1.5
230--3--60
187
253
15.6
110
325
1.5
460--3--60
414
506
7.7
52
325
0.8
575--3--60
518
633
5.8
39
325
0.6
60
TYPE
DD--STD
DD--STD
DD--STD
HIGH
DD--STD
HIGH
DD--STD
HIGH
DD--STD
HIGH
Max
WATTS
980
980
980
2770
980
2770
980
2770
980
2770
IFM
Max
AMP Draw
7.8
7.8
7.8
7.9
7.8
7.9
8.0
3.6
4.2
2.9
APPENDIX IV. ELECTRICAL INFORMATION
ELECTRICAL INFORMATION (cont.)
Table 40 – RHS072, 6 TONS........1--Stage Cooling
VOLTAGE
RANGE
COMP (ea)
V--Ph--Hz
MIN
MAX
RLA
LRA
WATTS
FLA
208--3--60
187
253
19.0
123
325
1.5
230--3--60
187
253
19.0
123
325
1.5
460--3--60
414
506
9.7
62
325
0.8
575--3--60
518
633
7.4
50
325
0.6
OFM (ea)
TYPE
STD
HIGH
STD
HIGH
STD
HIGH
STD
HIGH
Max
WATTS
1600
2770
1600
2770
1600
2770
1600
2770
IFM
Max
AMP Draw
5.5
7.9
5.5
7.9
2.7
3.6
2.5
2.9
EFF at Full Load
80%
81%
80%
81%
80%
81%
80%
81%
FLA
5.2
7.5
5.2
7.5
2.6
3.4
2.4
2.8
Table 41 – RHS090, 7.5 TONS........2--Stage Cooling
VOLTAGE
RANGE
COMP (Cir 1)
COMP (Cir 2)
OFM (ea)
V--Ph--Hz
MIN
MAX
RLA
LRA
RLA
LRA
WATTS
FLA
208--3--60
187
253
13.1
83
13.1
83
325
1.5
230--3--60
187
253
13.1
83
13.1
83
325
1.5
460--3--60
414
506
6.1
41
6.1
41
325
0.8
575--3--60
518
633
4.4
33
4.4
33
325
0.6
TYPE
STD
HIGH
STD
HIGH
STD
HIGH
STD
HIGH
Max
WATTS
1310
2770
1310
2770
1310
2770
1310
2770
IFM
Max
AMP
Draw
5.5
7.9
5.5
7.9
2.7
3.6
2.5
2.9
EFF at
Full
Load
80%
81%
80%
81%
80%
81%
80%
81%
FLA
5.2
7.5
5.2
7.5
2.6
3.4
2.4
2.8
Max
WATTS
1310
2770
1310
2770
1310
2770
1310
2770
IFM
Max
AMP
Draw
5.5
7.9
5.5
7.9
2.7
3.6
2.5
2.9
EFF at
Full
Load
80%
80%
80%
80%
80%
80%
80%
81%
FLA
5.2
7.5
5.2
7.5
2.6
3.4
2.4
2.8
Table 42 – RHS102, 8.5 TONS........2--Stage Cooling
VOLTAGE
RANGE
COMP (Cir 1)
COMP (Cir 2)
OFM (ea)
V--Ph--Hz
MIN
MAX
RLA
LRA
RLA
LRA
WATTS
FLA
208--3--60
187
253
16.0
91
13.7
83
325
1.5
230--3--60
187
253
16.0
91
13.7
83
325
1.5
460--3--60
414
506
7.0
46
6.2
41
325
0.8
575--3--60
518
633
5.6
37
4.8
37
325
0.6
TYPE
STD
HIGH
STD
HIGH
STD
HIGH
STD
HIGH
61
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 43 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
Unit
RHS
V--- Ph--- Hz*
IFM
TYPE
208/230---1---60
DD---STD
DD---STD
208/230---3---60
036
MED**
HIGH
DD---STD
460---3---60
MED**
HIGH
575---3---60
DD---STD
MED**
HIGH
Nom
(kW)
--3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
9.8/13.0
--3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
--3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
--3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
--6.0
8.8
11.5
14.0
--6.0
8.8
11.5
14.0
--6.0
8.8
11.5
14.0
-------
FLA
--15.9/18.3
23.5/27.1
31.4/36.3
37.9/43.8
46.9/54.2
--9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
--9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
--9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
--7.2
10.6
13.8
16.8
--7.2
10.6
13.8
16.8
--7.2
10.6
13.8
16.8
-------
MCA
30.7
50.6/53.6
60.1/64.6
69.9/76.1
78.1/85.4
89.3/98.4
24.8
36.3/38.1
41.8/44.3
47.4/50.9
52.2/56.4
66.6/72.9
22.6
34.1/35.9
39.6/42.1
45.2/48.7
50.0/54.2
64.4/70.7
22.6
34.1/35.9
39.6/42.1
45.2/48.7
50.0/54.2
64.4/70.7
16.0
25.0
29.3
33.3
37.0
10.6
19.6
23.9
27.9
31.6
10.6
19.6
23.9
27.9
31.6
5.4
3.4
2.9
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
62
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
MOCP
MCA
MOCP
FLA
LRA
FLA
LRA
45
30
121
32.6
50
32
123
60/60
48/51
137/139
52.5/55.5
60/60
51/53
139/141
70/70
57/61
145/148
62.0/66.5
70/70
59/63
147/150
70/80
66/72
152/157
71.8/78.0
80/80
68/74
154/159
80/90
74/81
159/165
80.0/87.3
80/90
76/83
161/167
90/100
84/92
215/229 91.2/100.3 100/110
86/95
217/231
30
25
97
26.7
30
27
99
45/45
35/37
106/108
38.2/40.0
45/50
37/39
108/110
50/50
40/43
111/113
43.7/46.2
50/50
43/45
113/115
50/60
46/49
115/118
49.3/52.8
50/60
48/51
117/120
60/60
50/54
119/122
54.1/58.3
60/60
52/56
121/124
70/80
63/69
130/136
68.5/74.8
70/80
65/71
132/138
30
22
109
24.5
30
24
111
45/45
33/34
118/120
36.0/37.8
45/45
35/37
120/122
45/50
38/40
123/125
41.5/44.0
50/50
40/42
125/127
50/50
43/46
127/130
47.1/50.6
50/60
45/48
129/132
50/60
47/51
131/134
51.9/56.1
60/60
50/53
133/136
70/80
61/66
142/148
66.3/72.6
70/80
63/69
144/150
30
22
120
24.5
30
24
122
45/45
33/34
129/131
36.0/37.8
45/45
35/37
131/133
45/50
38/40
134/136
41.5/44.0
50/50
40/42
136/138
50/50
43/46
138/141
47.1/50.6
50/60
45/48
140/143
50/60
47/51
142/145
51.9/56.1
60/60
50/53
144/147
70/80
61/66
153/159
66.3/72.6
70/80
63/69
155/161
20
16
53
17.0
20
17
54
30
24
60
26.0
30
26
61
30
28
64
30.3
35
30
65
35
32
67
34.3
35
33
68
40
36
70
38.0
40
37
71
15
10
54
11.6
15
12
55
20
19
61
20.6
25
20
62
25
23
65
24.9
25
24
66
30
26
68
28.9
30
27
69
35
30
71
32.6
35
31
72
15
10
60
11.6
15
12
61
20
19
67
20.6
25
20
68
25
23
71
24.9
25
24
72
30
26
74
28.9
30
27
75
35
30
77
32.6
35
31
78
15
5
5
7.4
15
7
7
15
3
8
5.4
15
5
10
15
3
12
4.9
15
5
14
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
UNIT
IFM
Nom
RHS
TYPE
(kW)
V--- Ph--- Hz
FLA
MCA
MOCP
MCA
MOCP
FLA
LRA
FLA
LRA
----36.2
50
35
128
38.1
50
37
130
3.3/4.4
15.9/18.3
56.0/59.0
60/60
54/56 144/146 57.9/60.9
60/70
56/59 146/148
6.5/8.7
31.4/36.3
75.4/81.5
80/90
71/77 159/164 77.3/83.4
80/90
74/79 161/166
208/230---1---60 DD---STD
9.8/13.0
46.9/54.2
94.8/103.9 100/110 89/98 222/236 96.7/105.8 100/110 91/100 224/238
13.1/17.4 62.8/72.5 114.7/126.8 125/150 108/119 254/273 116.6/128.7 125/150 110/121 256/275
15.8/21.0 75.8/87.5 130.9/145.5 150/150 122/136 280/303 132.8/147.4 150/150 125/138 282/305
----26.0
30
26
94
27.9
40
28
96
4.9/6.5
13.6/15.6
43.0/45.5
50/50
42/44 108/110 44.9/47.4
50/50
44/46 110/112
DD---STD
6.5/8.7
18.1/20.9
48.7/52.2
50/60
47/50 112/115 50.6/54.1
60/60
49/52 114/117
12.0/16.0 33.4/38.5
67.8/74.2
70/80
64/70 127/133 69.7/76.1
70/80
67/72 129/135
15.8/21.0 43.8/50.5
80.8/89.2
90/90
76/84 182/195 82.7/91.1
90/100
79/86 184/197
----23.8
30
23
106
25.7
30
26
108
4.9/6.5
13.6/15.6
40.8/43.3
50/50
39/41 120/122 42.7/45.2
50/50
41/44 122/124
208/230---3---60
MED**
6.5/8.7
18.1/20.9
46.5/50.0
50/50
44/47 124/127 48.4/51.9
50/60
46/50 126/129
12.0/16.0 33.4/38.5
65.6/72.0
70/80
62/68 139/145 67.5/73.9
70/80
64/70 141/147
15.8/21.0 43.8/50.5
78.6/87.0
80/90
74/82 194/207 80.5/88.9
90/90
76/84 196/209
----23.8
30
23
117
25.7
30
26
119
4.9/6.5
13.6/15.6
40.8/43.3
50/50
39/41 131/133 42.7/45.2
50/50
41/44 133/135
HIGH
6.5/8.7
18.1/20.9
46.5/50.0
50/50
44/47 135/138 48.4/51.9
50/60
46/50 137/140
048
12.0/16.0 33.4/38.5
65.6/72.0
70/80
62/68 150/156 67.5/73.9
70/80
64/70 152/158
15.8/21.0 43.8/50.5
78.6/87.0
80/90
74/82 205/218 80.5/88.9
90/90
76/84 207/220
----16.5
20
17
51
17.5
25
18
52
6.0
7.2
25.5
30
25
58
26.5
30
26
59
DD---STD
11.5
13.8
33.8
35
33
65
34.8
35
34
66
14.0
16.8
37.5
40
36
68
38.5
40
37
69
23.0
27.7
51.1
60
49
106
52.1
60
50
107
----11.2
15
11
52
12.2
15
12
53
6.0
7.2
20.2
25
19
59
21.2
25
20
60
460---3---60
MED**
11.5
13.8
28.4
30
27
66
29.4
30
28
67
14.0
16.8
32.2
35
30
69
33.2
35
32
70
23.0
27.7
45.8
50
43
107
46.8
50
44
108
----11.2
15
11
58
12.2
15
12
59
6.0
7.2
20.2
25
19
65
21.2
25
20
66
HIGH
11.5
13.8
28.4
30
27
72
29.4
30
28
73
14.0
16.8
32.2
35
30
75
33.2
35
32
76
23.0
27.7
45.8
50
43
113
46.8
50
44
114
DD---STD
----10.6
15
11
43
12.5
15
13
45
575---3---60
MED**
----9.0
15
9
46
10.9
15
11
48
HIGH
----8.6
15
9
50
10.5
15
11
52
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
63
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
UNIT
IFM
Nom
RHS
TYPE
(kW)
V--- Ph--- Hz*
FLA
MCA
MOCP
MCA
MOCP
FLA
LRA
FLA
LRA
----41.7
60
40
145
43.6
60
43
147
4.9/6.5
23.5/27.1
71.0/75.5
80/80
67/72 169/172 72.9/77.4
80/80
70/74 171/174
6.5/8.7
31.4/36.3
80.9/87.0
90/100
76/82 176/181 82.8/88.9
100/100 79/84 178/183
208/230---1---60 DD---STD
9.8/13.0
46.9/54.2 100.3/109.4 110/110 94/103 239/253 102.2/111.3 110/125 96/105 241/255
13.1/17.4 62.8/72.5 120.2/132.3 125/150 113/124 271/290 122.1/134.2 125/150 115/126 273/292
15.8/21.0 75.8/87.5 136.4/151.0 150/175 128/141 297/320 138.3/152.9 150/175 130/143 299/322
----28.4
40
28
121
30.3
45
30
123
4.9/6.5
13.6/15.6
45.4/47.9
50/50
44/46 135/137 47.3/49.8
50/60
46/48 137/139
7.9/10.5
21.9/25.3
55.8/60.0
60/70
53/57 143/146 57.7/61.9
60/70
56/59 145/148
DD---STD
12.0/16.0 33.4/38.5
70.2/76.5
80/80
67/72 154/160 72.1/78.4
80/80
69/75 156/162
15.8/21.0 43.8/50.5
83.2/91.5
90/100
79/86 209/222 85.1/93.4
90/100
81/88 211/224
19.9/26.5 55.2/63.8
97.4/108.2 100/110 92/102 231/249 99.3/110.1 100/125 94/104 233/251
----26.2
40
26
144
28.1
40
28
146
4.9/6.5
13.6/15.6
43.2/45.7
50/50
41/44 158/160 45.1/47.6
50/50
43/46 160/162
7.9/10.5
21.9/25.3
53.6/57.8
60/60
51/55 166/169 55.5/59.7
60/60
53/57 168/171
208/230---3---60 MED**
12.0/16.0 33.4/38.5
68.0/74.3
70/80
64/70 177/183 69.9/76.2
70/80
66/72 179/185
15.8/21.0 43.8/50.5
81.0/89.3
90/90
76/84 232/245 82.9/91.2
90/100
78/86 234/247
19.9/26.5 55.2/63.8
95.2/106.0 100/110 89/99 254/272 97.1/107.9 100/110 91/101 256/274
----28.5
40
28
170
30.4
45
30
172
4.9/6.5
13.6/15.6
45.5/48.0
50/50
44/46 184/186 47.4/49.9
50/60
46/48 186/188
7.9/10.5
21.9/25.3
55.9/60.1
60/70
53/57 192/195 57.8/62.0
60/70
56/60 194/197
HIGH
12.0/16.0 33.4/38.5
70.3/76.6
80/80
67/73 203/209 72.2/78.5
80/80
69/75 205/211
060
15.8/21.0 43.8/50.5
83.3/91.6
90/100
79/86 258/271 85.2/93.5
90/100
81/89 260/273
19.9/26.5 55.2/63.8
97.5/108.3 100/110 92/102 280/298 99.4/110.2 100/125 94/104 282/300
----18.0
25
19
62
19.0
25
20
63
6.0
7.2
27.0
30
27
69
28.0
30
28
70
11.5
13.8
35.3
40
34
76
36.3
40
36
77
DD---STD
14.0
16.8
39.0
40
38
79
40.0
45
39
80
23.0
27.7
52.7
60
50
117
53.7
60
52
118
25.5
30.7
56.4
60
54
123
57.4
60
55
124
----13.0
20
13
69
14.0
20
14
70
6.0
7.2
22.0
25
21
76
23.0
25
22
77
11.5
13.8
30.3
35
29
83
31.3
35
30
84
460---3---60
MED**
14.0
16.8
34.0
35
32
86
35.0
40
33
87
23.0
27.7
47.7
50
45
124
48.7
50
46
125
25.5
30.7
51.4
60
48
130
52.4
60
49
131
----13.8
20
14
82
14.8
20
15
83
6.0
7.2
22.8
25
22
89
23.8
25
23
90
11.5
13.8
31.1
35
30
96
32.1
35
31
97
HIGH
14.0
16.8
34.8
35
33
99
35.8
40
34
100
23.0
27.7
48.5
50
46
137
49.5
50
47
138
25.5
30.7
52.2
60
49
143
53.2
60
50
144
DD---STD
----11.9
15
12
45
13.8
20
14
47
575---3---60
MED**
----9.9
15
10
52
11.8
15
12
54
HIGH
----10.7
15
11
63
12.6
15
13
65
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
64
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
UNIT
RHS
Nom
(kW)
FLA
MCA
----30.5
4.9/6.5
13.6/15.6
47.5/50.0
7.9/10.5
21.9/25.3
57.8/62.1
STD
12.0/16.0 33.4/38.5
72.2/78.6
15.8/21.0 43.8/50.5
85.2/93.6
19.9/26.5 55.2/63.8 99.5/110.2
----32.8
4.9/6.5
13.6/15.6
49.8/52.3
7.9/10.5
21.9/25.3
60.1/64.4
208/230---3---60 MED**
12.0/16.0 33.4/38.5
74.5/80.9
15.8/21.0 43.8/50.5
87.5/95.9
19.9/26.5 55.2/63.8 101.8/112.5
----32.8
4.9/6.5
13.6/15.6
49.8/52.3
7.9/10.5
21.9/25.3
60.1/64.4
HIGH
12.0/16.0 33.4/38.5
74.5/80.9
15.8/21.0 43.8/50.5
87.5/95.9
19.9/26.5 55.2/63.8 101.8/112.5
----15.5
6.0
7.2
24.5
072
11.5
13.8
32.8
STD
14.0
16.8
36.5
23.0
27.7
50.2
25.5
30.7
53.9
----16.3
6.0
7.2
25.3
11.5
13.8
33.6
460---3---60
MED**
14.0
16.8
37.3
23.0
27.7
51.0
25.5
30.7
54.7
----16.3
6.0
7.2
25.3
11.5
13.8
33.6
HIGH
14.0
16.8
37.3
23.0
27.7
51.0
25.5
30.7
54.7
STD
----12.3
MED**
----12.7
575---3---60
HIGH
----12.7
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
V--- Ph--- Hz*
IFM
TYPE
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
FLA
LRA
FLA
LRA
MOCP
MCA
MOCP
45
30
146
32.4
50
32
148
60/60
45/47
160/162
49.4/51.9
60/60
47/50
162/164
60/70
55/59
168/171
59.7/64.0
60/70
57/61
170/173
80/80
68/74
179/185
74.1/80.5
80/90
70/76
181/187
90/100
80/88
234/247
87.1/95.5
90/100
82/90
236/249
100/125
93/103
256/274 101.4/112.1 110/125
95/105
258/276
50
32
183
34.7
50
34
185
60/60
48/50
197/199
51.7/54.2
60/60
50/52
199/201
70/70
57/61
205/208
62.0/66.3
70/70
60/63
207/210
80/90
71/76
216/222
76.4/82.8
80/90
73/79
218/224
90/100
83/90
271/284
89.4/97.8
90/100
85/92
273/286
110/125
96/106
293/311 103.7/114.4 110/125
98/108
295/313
50
32
183
34.7
50
34
185
60/60
48/50
197/199
51.7/54.2
60/60
50/52
199/201
70/70
57/61
205/208
62.0/66.3
70/70
60/63
207/210
80/90
71/76
216/222
76.4/82.8
80/90
73/79
218/224
90/100
83/90
271/284
89.4/97.8
90/100
85/92
273/286
110/125
96/106
293/311 103.7/114.4 110/125
98/108
295/313
25
15
73
16.5
25
16
74
30
23
80
25.5
30
24
81
35
31
87
33.8
40
32
88
40
34
90
37.5
40
36
91
60
47
128
51.2
60
48
129
60
50
134
54.9
60
52
135
25
16
92
17.3
25
17
93
30
24
99
26.3
30
25
100
35
32
106
34.6
40
33
107
40
35
109
38.3
40
36
110
60
48
147
52.0
60
49
148
60
51
153
55.7
60
52
154
25
16
92
17.3
25
17
93
30
24
99
26.3
30
25
100
35
32
106
34.6
40
33
107
40
35
109
38.3
40
36
110
60
48
147
52.0
60
49
148
60
51
153
55.7
60
52
154
15
12
59
14.2
20
14
61
20
12
74
14.6
20
15
76
20
12
74
14.6
20
15
76
65
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
UNIT
RHS
Nom
(kW)
FLA
MCA
----37.7
7.8/10.4 21.7/25.0
64.8/68.9
12.0/16.0 33.4/38.5
79.4/85.8
STD
18.6/24.8 51.7/59.7 102.3/112.3
24.0/32.0 66.7/77.0 121.1/133.9
31.8/42.4 88.4/102.0 148.2/165.2
----40.0
7.8/10.4 21.7/25.0
67.1/71.2
12.0/16.0 33.4/38.5
81.7/88.1
208/23---3---60 MED**
18.6/24.8 51.7/59.7 104.6/114.6
24.0/32.0 66.7/77.0 123.4/136.2
31.8/42.4 88.4/102.0 150.5/167.5
----40.0
7.8/10.4 21.7/25.0
67.1/71.2
12.0/16.0 33.4/38.5
81.7/88.1
HIGH
18.6/24.8 51.7/59.7 104.6/114.6
24.0/32.0 66.7/77.0 123.4/136.2
31.8/42.4 88.4/102.0 150.5/167.5
----17.9
13.9
16.7
38.8
16.5
19.8
42.7
STD
27.8
33.4
59.7
33.0
39.7
67.6
090
41.7
50.2
80.7
----18.7
13.9
16.7
39.6
16.5
19.8
43.5
460---3---60
MED**
27.8
33.4
60.5
33.0
39.7
68.4
41.7
50.2
81.5
----18.7
13.9
16.7
39.6
16.5
19.8
43.5
HIGH
27.8
33.4
60.5
33.0
39.7
68.4
41.7
50.2
81.5
----13.5
17.0
20.4
39.0
STD
34.0
40.9
64.6
----13.9
17.0
20.4
39.4
575---3---60
MED**
34.0
40.9
65.0
----13.9
17.0
20.4
39.4
HIGH
34.0
40.9
65.0
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
66
V--- Ph--- Hz
IFM
TYPE
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
FLA
LRA
FLA
LRA
MOCP
MCA
MOCP
50
40
193
41.5
50
44
197
70/70
65/68
215/218
68.6/72.7
70/80
69/73
219/222
80/90
78/84
226/232
83.2/89.6
90/90
82/88
230/236
110/125 99/108
245/253 106.1/116.1 110/125
103/113 249/257
125/150 116/128 260/270 124.9/137.7 125/150
121/132 264/274
150/175 141/157 370/397 152.0/169.0 175/175
146/161 374/401
50
42
230
43.8
50
47
234
70/80
67/71
252/255
70.9/75.0
80/80
72/75
256/259
90/90
81/86
263/269
85.5/91.9
90/100
85/91
267/273
110/125 102/111 282/290 108.4/118.4 110/125
106/115 286/294
125/150 119/131 297/307 127.2/140.0 150/150
123/135 301/311
175/175 144/160 407/434 154.3/171.3 175/175
148/164 411/438
50
42
230
43.8
50
47
234
70/80
67/71
252/255
70.9/75.0
80/80
72/75
256/259
90/90
81/86
263/269
85.5/91.9
90/100
85/91
267/273
110/125 102/111 282/290 108.4/118.4 110/125
106/115 286/294
125/150 119/131 297/307 127.2/140.0 150/150
123/135 301/311
175/175 144/160 407/434 154.3/171.3 175/175
148/164 411/438
20
19
95
19.7
25
21
97
40
38
112
40.6
45
40
114
45
42
115
44.5
45
44
117
60
57
128
61.5
70
59
130
70
65
135
69.4
70
67
137
90
77
195
82.5
90
79
197
25
20
114
20.5
25
22
116
40
39
131
41.4
45
41
133
45
43
134
45.3
50
45
136
70
58
147
62.3
70
60
149
70
65
154
70.2
80
68
156
90
78
214
83.3
90
80
216
25
20
114
20.5
25
22
116
40
39
131
41.4
45
41
133
45
43
134
45.3
50
45
136
70
58
147
62.3
70
60
149
70
65
154
70.2
80
68
156
90
78
214
83.3
90
80
216
15
14
77
17.3
20
19
81
40
38
97
42.8
45
42
101
70
61
118
68.4
70
66
122
20
15
92
17.7
20
19
96
40
38
112
43.2
45
43
116
70
62
133
68.8
70
66
137
20
15
92
17.7
20
19
96
40
38
112
43.2
45
43
116
70
62
133
68.8
70
66
137
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
ELEC. HTR
UNIT
RHS
Nom
(kW)
FLA
MCA
----41.9
7.8/10.4 21.7/25.0
69.0/73.2
12.0/16.0 33.4/38.5
83.7/90.0
STD
18.6/24.8 51.7/59.7 106.5/116.5
24.0/32.0 66.7/77.0 125.3/138.2
31.8/42.4 88.4/102.0 152.4/169.4
----44.2
7.8/10.4 21.7/25.0
71.3/75.5
12.0/16.0 33.4/38.5
86.0/92.3
208/230---3---60 MED**
18.6/24.8 51.7/59.7 108.8/118.8
24.0/32.0 66.7/77.0 127.6/140.5
31.8/42.4 88.4/102.0 154.7/171.7
----44.2
7.8/10.4 21.7/25.0
71.3/75.5
12.0/16.0 33.4/38.5
86.0/92.3
HIGH
18.6/24.8 51.7/59.7 108.8/118.8
24.0/32.0 66.7/77.0 127.6/140.5
31.8/42.4 88.4/102.0 154.7/171.7
----19.2
13.9
16.7
40.0
16.5
19.8
43.9
STD
27.8
33.4
60.9
33.0
39.7
68.8
102
41.7
50.2
81.9
----20.0
13.9
16.7
40.8
16.5
19.8
44.7
460---3---60
MED**
27.8
33.4
61.7
33.0
39.7
69.6
41.7
50.2
82.7
----20.0
13.9
16.7
40.8
16.5
19.8
44.7
HIGH
27.8
33.4
61.7
33.0
39.7
69.6
41.7
50.2
82.7
----15.4
17.0
20.4
40.9
STD
34.0
40.9
66.5
----15.8
17.0
20.4
41.3
575---3---60
MED**
34.0
40.9
66.9
----15.8
17.0
20.4
41.3
HIGH
34.0
40.9
66.9
*Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Field supplied belts and pulleys required to achieve medium static.
See Legend and calculations on page 75.
V--- Ph--- Hz
IFM
TYPE
WITHOUT C.O. or UNPWR C.O.
WITHOUT P.E.
WITH P.E.
DISC. SIZE
DISC. SIZE
FLA
LRA
FLA
LRA
MOCP
MCA
MOCP
50
44
201
45.7
60
48
205
70/80
69/72 223/226 72.8/77.0
80/80
73/77
227/230
90/100
82/88 234/240 87.5/93.8
90/100
86/92
238/244
110/125 103/112 253/261 110.3/120.3 125/125 107/117 257/265
150/150 120/132 268/278 129.1/142.0 150/150 125/137 272/282
175/175 145/161 378/405 156.2/173.2 175/175 150/165 382/409
60
46
238
48.0
60
51
242
80/80
71/75 260/263 75.1/79.3
80/80
76/79
264/267
90/100
85/91 271/277 89.8/96.1
90/100
89/95
275/281
110/125 106/115 290/298 112.6/122.6 125/125 110/119 294/302
150/150 123/135 305/315 131.4/144.3 150/150 127/139 309/319
175/175 148/164 415/442 158.5/175.5 175/200 152/168 419/446
60
46
238
48.0
60
51
242
80/80
71/75 260/263 75.1/79.3
80/80
76/79
264/267
90/100
85/91 271/277 89.8/96.1
90/100
89/95
275/281
110/125 106/115 290/298 112.6/122.6 125/125 110/119 294/302
150/150 123/135 305/315 131.4/144.3 150/150 127/139 309/319
175/175 148/164 415/442 158.5/175.5 175/200 152/168 419/446
25
20
100
21.0
25
22
102
45
39
117
41.8
45
41
119
45
43
120
45.7
50
45
122
70
58
133
62.7
70
60
135
70
66
140
70.6
80
68
142
90
78
200
83.7
90
80
202
25
21
119
21.8
25
23
121
45
40
136
42.6
45
42
138
45
44
139
46.5
50
46
141
70
59
152
63.5
70
61
154
70
67
159
71.4
80
69
161
90
79
219
84.5
90
81
221
25
21
119
21.8
25
23
121
45
40
136
42.6
45
42
138
45
44
139
46.5
50
46
141
70
59
152
63.5
70
61
154
70
67
159
71.4
80
69
161
90
79
219
84.5
90
81
221
20
16
85
19.2
25
20
89
45
40
105
44.7
45
44
109
70
63
126
70.3
80
68
130
20
17
100
19.6
25
21
104
45
40
120
45.1
50
44
124
70
64
141
70.7
80
68
145
20
17
100
19.6
25
21
104
45
40
120
45.1
50
44
124
70
64
141
70.7
80
68
145
67
APPENDIX IV. ELECTRICAL INFORMATION (cont.)
Table 45 (cont.) MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
* Nominal valves, listed as 208/240V, 480V or 600V as appropriate.
** Available from Fast Parts.
See Legend and calculations on page 75.
1Fuse
or breaker
LEGEND:
CO
-- Convenient outlet
DISC
-- Disconnect
FLA
-- Full load amps
IFM
-- Indoor fan motor
LRA
-- Locked rotor amps
MCA
-- Minimum circuit amps
MOCP
-- Maximum over current protection
PE
-- Power exhaust
UNPWRD CO -- Unpowered convenient outlet
NOTES:
1.In compliance with NEC requirements for multimotor and
combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. Canadian units may be fuse or circuit
breaker.
1.Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
3
=
=
681
3
227
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance
= 100 x
4
227
= 1.76%
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
APPENDIX V. WIRING DIAGRAM LIST
Wiring Diagrams
SIZE
036
048
060
072
090
102
VOLTAGE
208/230---1---60
208/230---3---60
460---3---60
575---3---60
208/230---1---60
208/230---3---60
460---3---60
575---3---60
208/230---1---60
208/230---3---60
460---3---60
575---3---60
208/230---3---60
460---3---60
575---3---60
208/230---3---60
460---3---60
575---3---60
208/230---3---60
460---3---60
575---3---60
RHS
CONTROL
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501434.02
48TM501370.03
48TM501370.03
48TM501370.03
48TM501370.03
48TM501370.03
48TM501370.03
NOTE: Component arrangement on Control; Legend on Power Schematic
68
POWER
48TM501435.02
48TM501436.02
48TM501436.02
48TM501436.02
48TM501435.02
48TM501436.02
48TM501436.02
48TM501436.02
48TM501435.02
48TM501436.02
48TM501436.02
48TM501436.02
48TM501436.0
48TM501436.0
48TM501436.0
48TM501371.04
48TM501371.04
48TM501371.04
48TM501371.04
48TM501371.04
48TM501371.04
APPENDIX VI. MOTORMASTER SENSOR LOCATIONS
Sensor
Location
Sensor
Location
FIGURE 54 RHS036 Outdoor Circuiting
FIGURE 56
RHS060 Outdoor Circuiting
Sensor
Location
Sensor
Location
FIGURE 55
RHS048 Outdoor Circuiting
FIGURE 57
RHS072Outdoor Circuiting
69
APPENDIX VI. MOTORMASTER SENSOR LOCATIONS
Sensor
Location
FIGURE 58 RHS090/102 Outdoor Circuiting
70
START-UP CHECKLIST
(Remove and Store in Job File)
I. PRELIMINARY INFORMATION
MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:
II. PRE-START-UP (insert checkmark in box as each item is completed)
j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE
j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT
j REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS
j CHECK REFRIGERANT PIPING FOR INDICATIONS OF LEAKS; INVESTIGATE AND REPAIR IF NECESSARY
j CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
j CHECK THAT RETURN (INDOOR) AIR FILTERS ARE CLEAN AND IN PLACE
j VERIFY THAT UNIT INSTALLATION IS LEVEL
j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW
TIGHTNESS
j CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES
OR SHARP METAL EDGES
j CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS
III. START-UP
ELECTRICAL
SUPPLY VOLTAGE
L1-L2
CIRCUIT 1 COMPRESSOR AMPS L1
L2-L3
L3-L1
L2
L3
CIRCUIT 2 COMPRESSOR AMPS L1
L2
L3
INDOOR-FAN AMPS
OUTDOOR-FAN AMPS
NO. 1
NO. 2
TEMPERATURES
OUTDOOR-AIR TEMPERATURE
DB
WB
RETURN-AIR TEMPERATURE
DB
WB
COOLING SUPPLY AIR
DB
WB
PRESSURES (Cooling Mode)
REFRIGERANT SUCTION, CIRCUIT 1
PSIG
F
REFRIGERANT SUCTION, CIRCUIT 2
PSIG
F
REFRIGERANT DISCHARGE, CIRCUIT 1
PSIG
F
REFRIGERANT DISCHARGE, CIRCUIT 2
PSIG
F
j
VERIFY THAT 3-PHASE FAN MOTOR AND BLOWER ARE ROTATING IN CORRECT DIRECTION.
j
VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION
j
VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
GENERAL
j SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS
(IF EQUIPPED)
71
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