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COMPRESSORS

The scroll compressor used in this product is specifically de-
signed to operate with R-410A Refrigerant and cannot be inter-
changed.

CAUTION: This system uses R-410A Refrigerant which oper-

ates at higher pressures than R-22. No other refrig-
erant may be used in this system.

The compressor also uses a polyolester (POE oil) Mobil 3MA
POE. This oil is extremely hygroscopic, meaning it absorbs wa-
ter readily. POE oil can absorb 15 times as much water as other
oils designed for HCFC and CFC refrigerants. Take all neces-
sary precautions to avoid exposure of the oil to the atmos-
phere.

CAUTION: Do not leave the system open to the atmosphere.

Unit damage could occur due to moisture being ab-
sorbed by the POE oil in the system. This type of
oil is highly susceptible to moisture absorption.

POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.

CAUTION: Exposure, even if immediately cleaned up, may

cause embrittlement (leading to cracking) to occur
in one year or more. When performing any service
that may risk exposure of compressor oil to the
roof, take precautions to protect roofing.

Procedures which risk oil leakage include, but are not limited
to, compressor replacement, repairing refrigerant leaks, re-
placing refrigerant components such as filter drier, pressure
switch, metering device or coil.

Units are shipped with compressor mounting which are
factory-adjusted and ready for operation.

CAUTION: Do not loosen compressor mounting bolts.

PHASING

Three-phase, scroll compressors operate in only one direction.
If the scroll is drawing low amperage, has similar suction and
discharge pressures, or is producing a high noise level, the
scroll is misphased. Change the incoming line connection
phasing to obtain the proper rotation.

CAUTION: Scroll compressors require proper rotation to oper-

ate properly. Failure to check and correct rotation
may result in property damage.

4

Unitary Products Group

035-20188-000-A-0704

R

G

W

R

C

Y

Y

W 2

C

W 1

O

O

G

24 VOLT TRANSFORMER

UNIT TERMINAL STRIP

THERMOSTAT

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can

cause improper and dangerous operation. Verify proper operation after servicing.

** = Minimum wire size of 18 AWG

wire should be used for all field
installed 24 volt wire.

**

* = Only required on units with

supplemental electric heat.

*

CONTROL WIRING

NOTE:
HEAT ANTICIPATOR
SHOULD BE SET AT 0.25
AMPS FOR ALL MODELS.

PROGRAMMABLE

THERMOSTAT ONLY

POWER WIRING

REFER TO ELECTRICAL DATA

TABLES TO SIZE THE DISCON-

NECT SWITCH, WIRING &

OVERCURRENT PROTECTION.

REFER TO ELECTRICAL DATA

TABLES TO SIZE THE DISCON-

NECT SWITCH, WIRING &

FIG. 2 - TYPICAL FIELD WIRING DIAGRAM

Summary of Contents for BAUZ Series

Page 1: ...Post start Check List 035 16605 003 Electric Heater Accessory REPLACEMENT PARTS Refer to User s Maintenance and Service Information Manual for complete listing of replacement parts on this equipment C...

Page 2: ...nser section 5 Maintain level tolerance of unit to 1 8 maximum RIGGING OR HANDLING Care must be exercised when moving the unit Do not remove any packaging until the unit is near the place of installat...

Page 3: ...densate drain The plumbing must conform to local codes Use a seal ing compound on male pipe threads Install the condensate drain line NPTF to spill into an open drain SERVICE ACCESS Access to all serv...

Page 4: ...refrigerant leaks re placing refrigerant components such as filter drier pressure switch metering device or coil Units are shipped with compressor mounting which are factory adjusted and ready for op...

Page 5: ...4 208 230 1 60 187 253 14 3 60 0 0 9 4 8 21 7 30 30 0 96 40 030 208 230 1 60 187 253 16 4 72 5 1 0 4 8 24 2 35 35 0 96 40 208 230 3 60 187 253 11 6 60 0 1 0 4 8 18 8 25 25 0 96 75 460 3 60 414 504 5 0...

Page 6: ...5 150 150 175 175 030 208 230 3 60 11 6 60 0 1 0 4 8 2NH04501025 2NH04501525 7 5 10 0 11 3 15 0 20 8 24 1 31 3 36 1 44 7 48 7 57 7 63 7 45 50 60 70 45 50 60 70 036 208 230 3 60 12 9 77 0 1 0 6 9 2NH04...

Page 7: ...Performance Table 2 The pressure thru the economizer is greater for 100 outdoor air then for 100 return air If the resistance of the return air duct system is less then 0 25 IWG the unit will deliver...

Page 8: ...RALL OVERALL All dimensions are in inches They are subject to change without notice Certified dimensions will be provided upon request UNIT CONDENSATE CONNECTION NPTI TRAP REQUIRED OVERALL SIDE SUPPLY...

Page 9: ...ombination of outdoor ambient and outdoor coil temperatures indicate that defrosting is necessary When coil temperature is below the ini tiate point for the ambient temperature continuously for 4 1 2...

Page 10: ...OFF HEATER BANK 3 ELEC HEAT INSTANT OFF HEATER BANK 2 ELEC HEAT SEC DELAY OFF HEATER BANK 1 ELEC HEAT 1 SEC DELAY OFF FAN 10 SEC DELAY OFF G Y W ON FAN INSTANT ON COMPRESSOR AND OUTDOOR FAN INSTANT ON...

Page 11: ...OFF G W ON FAN INSTANT ON HEATER BANK 1 2 3 ELEC HEAT INSTANT ON HEATER BANK 4 5 6 ELEC HEAT 10 SEC DELAY ON OFF HEATER BANK 4 5 6 ELEC HEAT INSTANT OFF HEATER BANK 1 2 3 ELEC HEAT SEC DELAY OFF FAN 1...

Page 12: ...door coil surface or other parts in the air circuit Cleaning should be as often as necessary to keep the coil clean Use a brush vacuum cleaner attachment or other suitable means If water is used to cl...

Page 13: ...Unitary Products Group 13 035 20188 000 A 0704 FIG 5 TYPICAL WIRING DIAGRAM BUZ MODELS 208 230 1 60 POWER SUPPLY...

Page 14: ...14 Unitary Products Group 035 20188 000 A 0704 FIG 6 TYPICAL WIRING DIAGRAM BUZ 208 230 3 60 POWER SUPPLY...

Page 15: ...Unitary Products Group 15 035 20188 000 A 0704 FIG 7 TYPICAL WIRING DIAGRAM BUZ 460 3 60 POWER SUPPLY...

Page 16: ...an Oklahoma 73069 Subject to change without notice Printed in U S A Copyright by York International Corporation 2004 All Rights Reserved Supersedes Nothing 035 20188 000 A 0704 0 1 2 1 2 3 1 2 4 53 6...

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