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AE4-1312 R2
Application Guidelines for 1.5 to 6.75 Ton Refrigerant
Introduction
The ZR*KA, ZR*KC, ZR*K3, & ZR*K4 Copeland Scroll
compressors include a wide range of capacities,
electrical options, and features. Typical model numbers
are ZR24K4-PFV and ZR81KC-TF5. This bulletin
describes the operating characteristics, design features,
and application requirements for these models. For
additional information, please refer to the online
product information accessible from the Emerson
Climate Technologies website at www.emersonclimate.
com. Operating principles of the Copeland Scroll are
described in Figure 7 at the end of this bulletin.
The ZR*KA scroll compressors are designed for air
conditioning systems only in the 12+ SEER range
but may be applied to 10 SEER A/C systems if desired.
They range in size from 16,000 to 54000 Btu/hr (4.7 to
15.8 kw-hr).
The ZR*K3 and K4 are models designed for 11+ SEER
A/C and heat pump usage ranging in size from 16,000
to 61,000 Btu/hr (4.7 to 17.9 kw-hr).
The ZR*KC models are designed for 10 SEER
A/C and heat pump usage ranging in size from 16,000
to 81,000 Btu/hr (4.7 to 23.7 kw-hr).
The models include a number of features outlined in
the matrix below:
ZR16-29KC
ZR16-24K4
ZR16-34KA
ZR38-54KA
ZR18-48K3
ZR26-48KC
ZR54-61K3
ZR54-81KC
*
Approximate Shell Diameter (e.g. 53 = 5.5 Inches)
© 2010 Emerson Climate Technologies
Printed in the U.S.A.
R-22, 407C, 134A Copeland Scroll
Application
Motor
Frame Size*
AC
HP
53
X
X
53
X
X
53
X
NO
63
X
NO
63
X
X
63
X
X
70
X
X
70
X
X
Compressors
®
IPR Valve-Internal Pressure Relief Valve
®
The internal pressure relief valve is located between
the high side and the low side of the compressor. It
is designed to open when the discharge to suction
differential pressure exceeds 375 to 450 psid (26 – 32
kg/cm 2 ). When the valve opens, hot discharge gas
is routed back into the area of the motor protector to
cause a trip.During developmental blocked fan testing,
it is sometimes noted that the valve opens, but the
compressor does not shut off while the discharge
pressure continues to climb. This condition is normally
caused by refrigerant flood back and may be corrected
by using a more restrictive expansion device or reducing
the refrigerant charge.
Internal Temperature Protection
The Therm-O-Disc
snap disc device located between the high and low
pressure side of the scroll. It is designed to open and
route excessively hot discharge gas back to the motor
protector. During a situation such as loss of charge,
the compressor will be protected for some time while
it trips on the protector. However, as refrigerant leaks
out, the mass flow and the amperage draw are reduced
and the scrolls will start to overheat. Normally, during
air conditioning operation the problem is detected
because of rising indoor temperatures before damage
is done. This may not be the case during heat pump
Quiet Shut
IPR
TOD
Down
NO
X
X
NO
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
AE4-1312 R2
January, 2005
Reformatted November 2010
®
or TOD is a temperature-sensitive
Discharge
Motor
Check Valve
Protector
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Related Manuals for Emerson Copeland Scroll ZR KA Series
Summary of Contents for Emerson Copeland Scroll ZR KA Series
- Page 1 Emerson it is sometimes noted that the valve opens, but the Climate Technologies website at www.emersonclimate.
- Page 2 To test for flood back conditions compressor. This check valve was not designed to be © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 3 This includes long line length systems where the extra compressor equipped with a sight tube (available from charge will increase the standard factory charge above Emerson Climate Technologies) and install it in a system the 120% limit. with the longest connecting lines that are approved for the system.
- Page 4 Application Engineering bulletin 17-1248 for more conditions. Elimination of the “beat” can be achieved information about oil types Emerson uses. A complete by attenuating either of the contributing frequencies. recharge should be four fluid ounces (118 ml) less than The most important frequencies to avoid are line and the nameplate value.
- Page 5 Reverse rotation will result bearings and internal seal. (See AE24-1105 for proper in substantially-reduced current draw compared to system evacuation procedures.) normal values. © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 6 (under Emerson test runs the compressor. The inside of both one hour) but oil may be lost. After several minutes of fittings should we wiped with a lint free wipe to remove reverse operation, the compressor’s internal protector...
- Page 7 Instructions should be ±15% from published values, a faulty compressor provided in appropriate product literature and assembly may be indicated. A current imbalance exceeding (line repair) areas. If compressor removal is required, © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 8 This is because compressors and systems can be found in Section the accumulator oil return orifice or screen may be H of the Emerson Climate Technologies Electrical plugged with debris or may become plugged shortly after Handbook.
- Page 9 Accumulators in Application Considerations and also any protector trips, or any compressor stalls during AE11-1247). Increasing indoor coil volume, increasing each test. Review the results with Emerson Climate outdoor air flow, reducing refrigerant charge, decreasing Technologies Application Engineering to determine capillary or orifice diameter, and adding a charge if an accumulator is required for the application.
- Page 10 When the above configuration is not possible and the unit charge is over the charge limit shown in Table 5, a crankcase heater is required. © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 11 Time Delay Relay Specifications Timer Opens 1 Electrical cycle Timer Closes Greater than 5 seconds later (.016 sec. with 60 HZ operation) power is restored or not after power is removed Figure 3 © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 12 Terminal (Fusite) Connection T1,C T2,S T3,R Motor Terminal (Fusite) Connections Figure 4 R22 Scroll Operating Envelope Evaporating Temp. (°C) ZR__KA Limited Envelope All Other Scroll Products Evaporating Temp. ( °F) Figure 5 © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 13 Area 3. This will draw the braze material down into the joint. The time spent heating Area 3 should be minimal. • As with any brazed joint, overheating may be detrimental to the final result. Figure 6 © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 14 AE4-1312 R2 Operating Principle of Scroll Figure 7 © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 15 AE4-1312 R2 © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 16 35µf/440 volt 55µf/370 volt 40µf/440 volt ZR46 40µf/440 volt 60µf/370 volt ZR49 40µf/440 volt 60µf/370 volt 45µf/440 volt ZR57 55µf/440 volt 80µf/370 volt 60µf/370 volt ZR61 55µf/440 volt 80µf/370 volt 60µf/370 volt © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 17 Heaters fit both 63 and 63 & 70 018-0057-06 02-6335-06 48” 70 frame* shells 018-0057-07 02-6335-02 48” 018-0057-08 02-6335-12 48” 018-0057-09 02-6332-04 21” *Approximate Shell Diameter (e.g. 70 = 7.3 Inches) © 2010 Emerson Climate Technologies Printed in the U.S.A.
- Page 18 88-108 014-0036-03 3ARR3CT3P5 040-0001-79 170-180 40-90 ZR48K(x)-PFV ZR46K(x) to 270-324 014-0006-10 3ARR3CT3P5 040-0001-79 170-180 40-90 ZR68K(x)-PFV x = C, 3, 4 or CE, 3E, 4E (ZR_KA Start components still in development) © 2010 Emerson Climate Technologies Printed in the U.S.A.