Schreiber Engineering 30AC Owner's manual

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IN NS ST TA AL LL LA AT TI IO ON N, , O OP PE ER RA AT TI IO ON N & & M MA AI IN NT TE EN NA AN NC CE E
O
OW WN NE ER RS S M MA AN NU UA AL L
Model: 30AC
Voltage: 220/1
Ref. Charge: R134A
Tel: [phone]
Fax: [phone]

TABLE OF CONTENTS
Model ………………………………….……………………………….………………………….. 1
Caution ………………………………….…………………………….…………………………... 2
30AC Specifications ……………………………………………………………………………… 3
Starting Check List …………………….…………………………………………………………. 4
Wiring Diagram ………………………….……………………………………………………….. 5
Instruction/Information …………………………………………………………………………… 6
Installation Instructions ………………………………………………………………………….. 7
Operation ………………………..………………………………………………………………… 7
Inside Your Chiller .……………………...……………………………………………………….. 8
Electrical System ……….……………………………………………………….……………… 8
Refrigeration System …………………………………………………………………………….. 9
Chilled Water System ……………………………………………………………………………. 9
Special Features …………………………………………………………………………………. 10
Service Bulletin …………………………………………………………………………….…….. 11
Maintenance Information ………………………………………………………………………... 14
Trouble Shooting – Part I ………………………………………………………………………... 15
Trouble Shooting – Part II ……………………………………………………………………….. 16
Parts List………………….…………………………………………….……...…….…………… 17
Limited Warranty…………………………………………………………………………………. 19

30AC Specifications:
GENERAL
Max rated ambient temp. 95 °F
Min. Chilled water temp. 44 °F
Max Water Temp. 85 °F
REFRIGERATION
Refrigerant R134A
Charge .75 lbs.
Compressor HP 1/3 HP
ELECTRICAL
Voltage 220/1
Full Load Amps 8
PUMP
Pump Specifications: 2.5 g.p.m. @ 60 p.s.i.
Nominal Flow Rate 1.6 g.p.m.
Nominal Pressure 60 p.s.i.
Pump Horsepower 1/3
Pump Type Positive Displacement
Pump Material Brass
PHYSICAL
Overall Dimensions 16.1W x 20.1D x 28.03H
Reservoir Capacity 3 Gallons
Weight 200 lbs.
Discharge/ Return Connections 3/8 NPT
Tank Fill 3/8 NPT
Tank Drain 3/8 NPT Ball Valve
3

STARTUP CHECKLIST
• POWER SUPPLY: Verify that the power you are supplying to the chiller matches
the requirements as stated on the nameplate. Hooking chiller up to the wrong
power supply will damage system components and void the warranty.
• FILL THE RESERVOIR: Using the fill port on the top of the chiller add water until
the level reaches the red line marked on the sight glass.
DO NOT USE DEIONIZED WATER!!
• Connect Discharge and Return Piping: Connect your piping to the two female
fitting on the back of the chiller. Rubber Hose, PVC, and copper are acceptable
piping materials. Do not use any ferrous piping material. Doing so will cause
damage to the chiller that is not covered by warranty.
• Check for proper rotation: (Not applicable for this model)
4

Schreiber Engineering – Air Cooled Water Chiller
Model 30 AC – 230/1
This unit comes completely wired for 230/1.
To test unit as follows. NOTE: Make sure that the switch on the panel is off.
Connect close loop water system as marked. The discharge from chiller water pump to
heat exchanger being cooled. Then the return water and the chiller return as marked.
These discharge and return fittings as 3/8” NPT. The connecting hose can be rubber or
plastic. The discharge pressure can be 60 p.s.i. Be sure you use a non-contaminate
hose.
Fill the reservoir through the fill pipe on top of the unit. Be sure you replace the cap
when the reservoir’s filled. The water sight glass is marked at the reservoir proper fill
level and is also marked for it’s low level.
The unit does have a plug on the electrical cable. You must install a 220 plug to match
your 230/1 power.
With the unit properly plugged into the 230/1 voltage, you can now start the unit by
turning on the main panel switch. This switch will start the water pump and give power
to the solid-state control panel. This panel will light up and give you a read out of the
discharge temperature. This unit leave the factor set at 60°F. You can read this set
temperature by pressing the button on the controller marked press to adjust should you
want to change the cut out temperature there is a small screw driver slot to make this
adjustment. Never set below 45 °F to prevent freezing of the reservoir coil.
With he controller set at the proper temperature it will control this temperature within ±1°
F.
In our wiring system is a low-pressure control. This control is set at 15 p.s.i. It is there
to protect the refrigeration system if there is a refrigerant leak. This control has an
automatic reset. Then the wire in series with this control is a high-pressure control.
Should the pressure in the refrigeration system reach over 422 p.s.i. this control will cut
out the voltage. This control is manual reset. Do not try to adjust these controls.
A NOTE OF CAUTION: Always keep the fluid in the reservoir at it’s proper level. If the
unit condenser becomes clogged it must be cleaned. Be sure you check the condenser
often. Does not take much dirt in condenser to cause a problem.
The refrigeration system is a medium temperature. Never set the controller below 45°F.
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INSTALLATION
1. Place chiller on level ground.
2. Allow 3 of clearance in front of the air inlet and outlet. If the airflow in and out
of the chiller is restricted the chiller’s cooling capacity is reduced.
3. Connect chiller to power supply. Refer to the nameplate for electrical circuit
requirements.
4. Connect chilled water piping.
5. Fill tank to proper level. Note the when the chiller is started the water level will
drop slightly as the pipes are filled. Add more water after the unit is started.
3’3’
OPERATION
1. After all electrical and plumbing connections are made, and the reservoir is filled,
you are ready to start the unit..
2. Turn the main power switch to the “ON” position.
3. The temperature displayed is the chiller discharge temperature. To adjust the
chiller set point, push the black set point button that is below the display. With a
small slotted screwdriver turn the setscrew until it reads the desired chilled water
temperature. Do not set the temperature less than 45°F. You will damage the
unit.
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Set point adjustment
Set point view button
INSIDE YOUR CHILLER
Electrical System:
• This chiller runs off of 220/1 Volt, single-phase power. It can run at both 60Hz
and 50Hz, however, there is a 12% reduction if cooling capacity, and a 17%
reduction in flow capacity at 50 Hz
• The control system all 220 Volt. Please use caution when the control panel is
open. This can be dangerous.
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Refrigeration System
• The refrigeration system is factory charged with R-134A. If the refrigeration
system has to be serviced and recharged with refrigerant, do not use any other
than R-134A.
• The 30AC has low refrigerant pressure and high refrigerant pressure switches in
the control box. The low-pressure switch is an automatic reset switch that will
protect the compressor in the event of a refrigerant leak. It is set at 15 psi. The
high-pressure switch is a manually resetting switch. It will shut of when the
refrigerant pressure is too high due to a dirty condenser, excessive ambient
temperature, or a blockage in the refrigerant line. It is set a 425 psi. Do not try to
adjust the settings of these switches.
• This is a medium temperature chiller. The temperature range is 45 to 90°F. The
chiller will not operate to its full capacity outside of this temperature range.
• This chiller is rated to the ARI (American Refrigeration Institute) standard of 95°F
ambient air temperature and 44°F chilled water. The 30AC cannot deliver it’s
nominal capacity if the ambient temperature exceeds 95°F or if the desired
chilled water is less than 44°F.
Chilled Water System
• A 100 GPH (Gallons per Hour) positive displacement pump is supplied with this
chiller. Because of it’s design, the flow rate is not adjustable. The pressure can
be adjusted by throttling the discharge. If the discharge is throttled to much, the
internal pressure relief valve will open and bypass water back through the pump.
The pressure relief valve is factory set at 60 psi.
• The water used to fill the chiller must be absolutely free of any particulate matter.
If any particles or sediment is run through the pump it will score the inside,
resulting in a marked decrease in pump performance. This failure is not covered
by warranty. A filter is in the discharge line, however the water initially placed in
the reservoir must be clean.
• The reservoir level must be maintained to the level marked on the sight glass.
Damage to the evaporator can result due to low water level.
• Plumbing must be rubber hose, PVC, or copper. Use of any other material will
increase the chance of contamination in the chilled water system.
• The chilled water reservoir is not pressurized. Do not plumb two chillers in series.
• The 30AC has a 5-micron filter with 3/8” FIPT connections. An extra filter
cartridge is supplied with the chiller. Contact the factory to reorder.
9

SPECIAL FEATURES FOR MODEL 30AC
Chilled Water Filter
This unit has a 3/8" clear filter housing with a 3/8" - (5M) cartridge. There is an extra
cartridge shipped with this unit.
Water Pump
Water pump is rated at 2.5 G.P.M. @ 60 P.S.I. 230/1.
10

SERVICE BULLETIN
HERMETIC COMPRESSOR ELECTRICAL TERMINAL VENTING CAN BE
DANGEROUS
******
When the insulating material, which supports a hermetic compressor electrical terminal,
suddenly disintegrates due to physical abuse or as a result of an electrical short
between the terminal and the compressor housing, the terminal may be expelled,
venting the vaporous and liquid contents of the compressor housing and system.
If the hermetic compressor terminal PROTECTIVE COVER is not properly in place with
its weatherproofing gasket (if required) and bale strap fastening device secured, there is
a remote possibility if a terminal vents, that the vaporous and liquid discharge can be
ignited, spouting flames several feet, causing potentially severe or fatal injury to anyone
in its path.
The discharge from a venting terminal can be ignited external to the compressor if the
terminal PROTECTIVE COVER is not properly in place and if the discharge impinges
on a sufficient heat source such as, but not limited to, an open flame, electric heater, or
an electrical spark.
Ignition of the discharge can also occur at the venting terminal or inside the motor-
compressor enclosure, if there is sufficient contaminant air present in the system and an
electrical arc occurs as the terminal vents.
Ignition cannot occur at the venting terminal without the presence of contaminant air,
and cannot occur externally from the venting terminal without the presence of an
external ignition source.
It is, therefore, essential that any air in a refrigeration, air conditioning, or heat pump
system be completely removed when the system is manufactured - when the system is
installed - and whenever the system is field processed as a result of field service. Field
service includes, but is not limited to, leak repairs or compressor replacement.
Eliminating air within the system prevents ignition at, or in, the hermetic compressor if a
terminal should vent, thereby reducing the hazard potential.
To reduce the possibility of external ignition, all open flame, electrical power, and other
heat sources should be extinguished or turned off prior to servicing a system.
Before using a soldering or welding torch to remove or repair tubing, make sure all the
system refrigerant charge has safely been released.
A venting terminal presents no danger to servicing personnel or anyone else in the
vicinity if the compressor terminal PROTECTIVE COVER is properly in place as shown
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on Tecumseh Products Company drawings and diagrams using the parts as shown on
Tecumseh Products Company bills of material.
Hermetic compressors can be properly serviced without unnecessarily removing the
terminal PROTECTIVE COVER by adhering to the following service procedures:
1. If the branch circuit, short circuit, and ground fault protective device, i.e., fuse or
circuit breaker, is open, this is a strong indication that an electrical problem exists
and must be found and corrected.
The circuit protective device rating must first be checked as required by the
National Electrical Code, and its maximum rating should coincide with that
marked on the equipment nameplate and/or on the unit wiring diagram and/or
instructions. This breaker or fuse rating should be as low as practical. A rule of
thumb is 175% times the motor-compressor RLA (FLA on older units) as shown
on the unit nameplate.
It is acceptable to first replace the fuse or reset the circuit breaker ONE TIME to
determine if it was just a nuisance opening. WARNING! The terminal
PROTECTIVE COVER must be securely in place.
2. If the fuse or circuit breaker again opens, DO NOT continue to replace or reset, as
the equipment obviously has an electrical problem. CAUTION! Continual resetting
may cause the terminal to vent.
3. DISCONNECT all power to the unit, making sure all power legs are open.
4. Without removing the terminal PROTECTIVE COVER, disconnect the three leads
going to the compressor terminals at the nearest point to the compressor, and
identify them as Common (C), Start (S), and Run (R). Identification can generally
be made through the unit wiring diagram. DO NOT disconnect at the compressor
terminals at this time.
5. With a Megger, Hi-Potential Ground Tester, or other suitable instruments which
puts out a voltage between 300 and 1500 volts, check for a ground separately
between each of the three C, S, & R leads and ground (such as an unpainted
tube on the compressor). Do not use a low voltage output instrument such as a
volt-ohmmeter or other such continuity instruments, as these will not detect a low
level fault (ground).
6. If a ground is indicated, then carefully remove the compressor terminal
PROTECTIVE COVER and inspect for loose leads or insulation breaks in the lead
wires.
7. If #6 indicates no visible problem, carefully remove the leads at the compressor
terminals. CAUTION: Damage can occur to the glass embedded terminals at this
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point if the leads are not properly removed, which can result in the terminal
venting and hot oil discharging. No ignition, however, can occur if all power is
disconnected and no external ignition source is present.
8. Repeat #5 testing, carefully checking for ground, directly between each
compressor terminal (C, S, & R) and ground.
9. If once again a ground is indicated, proceed to properly replace the compressor,
as it has failed and cannot be repaired.
10. It is important to note that a volt-ohmmeter may be used only to check the
resistance and/or continuity of the motor windings. This may be done as follows:
(a) For internal overload protected motor-compressor, the overload is located
between the common terminal of the compressor and the common motor
lead inside the compressor.
If the resistance reading between Common and Start or Common and Run
is open (infinity) and the resistance reading between Start and Run
indicates winding Resistance Values in the Tecumseh Hermetic
Compressor Service Data Book, then the internal protector is open and
time must be allowed for it to reset.
Any Common and Start, Common and Run, and Start and Run resistance
reading must be within the values shown in Tecumseh Hermetic
Compressor Service Data Book.
Three phase internal overloads open all three phases. Therefore, allow
time for reset.
(b) For external overload protected motor-compressors, the continuity of the
overload may be checked. The resistance of all winding may also be
checked, i.e., C-S, C-R, and S-R.
(c) Any lack of continuity (other than test indicating an open internal protector)
or improper resistance, indicates a faulty or damaged motor and the
compressor must be properly replaced, as it has failed and cannot be
repaired.
If the above indicates no problem with the compressor, then carefully reconnect the
leads to the proper compressor terminals (C, S, & R), correctly replace the terminal
PROTECTIVE COVER, gasket (if required), and the bale strap.
Then proceed to conduct similar ground and continuity test from the three lead
connection points which you previously disconnected, forward toward the incoming
power connections, to find the electrical problem. DO NOT reset the ground fault
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protective device until you have located and corrected the problem. Refer to the Unit
Wiring Diagram and Service Manual for the proper procedure and wiring checkout.
The text of step-by-step procedures uses language and symbols, which refer to the
electrical supply as single phase. Three-phase equipment should be given equally
cautious consideration when service is necessary.
Again, we want to stress that it is essential that WHENEVER ELECTRIC POWER is
applied to the motor-compressor, the terminal PROTECTIVE COVER must be properly
in place.
Servicing refrigeration and air conditioning systems can be dangerous, and extreme
caution in all respects should be exercised by the personnel servicing such equipment.
The precautions discussed in this bulletin deal only with those dangers associated with
VENTING TERMINALS.
MAINTENANCE INFORMATION
1.
2.
There are no lubrication points on the chiller. All motors have permanent lubrication
in the bearings.
The water that is used in the chilled water circuit has no special requirements,
except that deionized water cannot be used. The water should be clean and
some type of water conditioner can be used. Nothing should be used in the chilled
water circuit that could damage the all copper Heat Exchanger. THIS INCLUDES
THE USE OF DEIONIZED WATER.
3.
4.
5.
The air-cooled condenser should be cleaned on a regular basis; depending on the
environment the chiller is installed in., check often.
The water level should be maintained as close to the level as marked on the water
sight glass. You can damage the refrigeration system by the water being at a low
level, and will affect the efficiency of the unit.
Caution: The compressor receivers and water pump could be hot enough to injure
one touching these components.
6.
7.
The dial thermometer is reading the temperature of the discharge-chilled water.
Please note:This is a hermetically sealed compressor. There are no necessary
maintenance requirements. Please read the service bulletins before making
any repairs.
14

TROUBLE SHOOTING - PART I
SYMPTOM DIAGNOSIS REMEDY
Compressor won't run
Check
Power supply
Electrical circuit
Check
Line load voltage
Temperature control
Compressor overload
Low pressure switch
High pressure switch
Manual switch
Compressor
All control circuit
Correct circuit breaker
Repair or replace bad circuit
Correct voltage condition
Repair or replace
Replace
Repair or replace
Repair or replace
Replace
Replace
Repair
Compressor runs
No refrigeration
Refrigerant leak
Stuck expansion valve
Repair leak and recharge
Replace expansion valve
High pressure trips
Condenser motor
Air over condenser restricted
Service panel not in place
Repair or replace motor
Clean condenser
Install service panel
Low pressure switch
Cutting out
Defective expansion valve
Refrigerant leak
Replace expansion valve
Repair leak
Temperature too high
Dial thermometer
Temperature controller
Water pump off
Re-adjust or replace
Replace
Check controls circuit
Temperature too cold
Temperature controller
Dial thermometer
Water pump
Repair or replace
Out of adjustment
Not circulating water
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TROUBLE SHOOTING - PART II
REFRIGERATION SYSTEM INTERNAL PRESSURE USING REFRIGERANT R-134A
* High Pressure Switch : Manual Reset - Cut out at 425 P.S.I.
* Low Pressure Switch : Automatic Reset - Cut out at 15 P.S.I.
WORKING REFRIGERANT PRESSURES R-134A
* High Pressure : 185 to 325 P.S.I.
* Low Pressure : 45 to 70 P.S.I.
***NOTE***
These pressures are under normal ambient temperatures and chilled water
temperatures.
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30AC – 230/1
If this unit has special feature(s) installed, see appendix for part number(s).
Part Number Description 115/1 230/1 Qty.
Refrigeration
R101 Compressor – 120/1 ½ hp 91
R100 Compressor – 220/1 ½ hp 91
R100-R Relay for Compressor 91
R100-SC Start Capacitor for Compressor 91
R100-RC Run Capacitor for Compressor 91
R120 Condenser – Air Cooled 991
R120-W Condenser – Water Cooled 991
R130 Receiver ½ Ton 991
R140-.5 Expansion Valve 991
R141-.5 Expansion Valve – ½ hw 991
R146-.5 Refrigeration Sight Glass 991
R150 Refrigeration Drier – ¼” 991
R160 Evaporator (All Copper) 991
R178 Suction Line Heat Exchanger 991
R182 High Pressure Switch 991
R183 Low Pressure Switch 991
Electrical 99
E103 Contactors – 30 Amps 992
E104 4 Point Terminal Block 991
E110 - 2 Transformer – 220/1 91
E110 -.5 Transformer – 120/1 91
E115 Grounding Screw 991
E122 Switch 992
E124-3 Pilot Light/Bulb – 24V 992
E126 Pilot Light/ Housing Assembly 992
E132 Thermostat 991
E134 Dial Thermometer 991
E140 Fan Motor – ¼ hp 991
E146-16 Fan Blade – 14” 16 Pitch 991
E146 - H ½ Hub for 14” Fan Blade 991
E153-16 Fan Guard for 14” Blade 991
Plumbing
P131 60 PSI Brass Pump 991
P131-M 1/3 HP 1PH Emerson Motor 991
P131-C Clamp for Motor 991
P30 Stainless Steel Tank 991
991

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Schreiber Limited Warranty
Schreiber warrants the product described herein
against defective material or workmanship for one
year from the date of purchase.
If any part is found to be defective within the war-
ranty period, Schreiber, or its authorized service
agent, will replace, or at Schreiber's options, re-
pair the part free of charge for materials and labor.
This warranty does not cover damage caused by
misuse, accident, abuse, incorrect installation or
operation. In addition, it does not cover damage
occurring during transit, or damage caused by or
resulting from repair or modifications carried out
by anyone other than Schreiber or its Authorized
Service Agent.
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