Goodman AGZ-BM013A Installation Manual

Installation, Operation and Maintenance Manual	IOMM 1155
	Group: Chiller
	Part Number: 331975001
	Effective: March 2012
	Supersedes: January 2012

Air-Cooled Scroll Compressor Water Chillers

AGZ 010BS – AGZ 034BS, Packaged Chiller AGZ 010BM – AGZ 034BM, Remote Evaporator

10 to 34 Tons, 35 to 120 kW

R-407C

60 Hertz

Software Version AGZSU0102D

Table of Contents
Introduction........................................	3
General Description...................................	3
Inspection ..................................................	3
Installation .................................................	3
Handling ....................................................	3
Location.....................................................	4
Service Access...........................................	4
Vibration Isolators .....................................	5
Chilled Water System ................................	9
Water Connections...................................	11
Refrigerant Charge ..................................	11
Unit Component Location .......................	11
Glycol Solutions......................................	12
Evaporator Water Flow and Pressure Drop12
R-407C Units ....................................	14
Control Layout and Operation.......	16
Control Center .........................................	16
Start-up and Shutdown....................	16
Pre Start-up..............................................	16
Start-up ....................................................	16
Sequence of Operation ............................	17
Physical Data ....................................	18
AGZ-BS, R-407C....................................	18
AGZ-BM, R-407C...................................	20
Electrical Data..................................	22
Field Wiring.............................................	22
R-407C ....................................................	22
Notes for Electrical Data .........................	25
Dimensions & Weights.....................	27
Remote Evaporators ................................	29
ACZ/AGZ Dimensions and Weights .......	30
System Maintenance ........................	31
General ....................................................	31

Lubrication..............................................	31
Electrical Terminals ................................	31
Condensers..............................................	31
Refrigerant Sight glass............................	31
Standard MicroTech II Controller.32
Table of Contents ....................................	32
Overview.................................................	33
General Description ................................	33
Setpoint Security.....................................	37
Equipment Protection Alarms .................	37
Control Functions and Definitions..........	38
Unit Enable .............................................	39
Unit Mode...............................................	39
Power Up Start Delay .............................	40
Ice Mode Start Delay ..............................	40
Unit State ................................................	40
Evaporator Water Pump State Control....	41
Condenser Fans.......................................	43
Low OAT Start........................................	43
Circuit Capacity Overrides .....................	43
Maximum LWT Rate ..............................	44
Low Ambient Lockout ............................	44
Compressor Control................................	44
Using the Controller................................	47
Menu Screens..........................................	48
BAS Interface...................................	60
Service...............................................	61
Thermostatic Expansion Valve ...............	61
Filter-Driers.............................................	61
Liquid Line Solenoid ..............................	61
Optional Controls....................................	62
Troubleshooting Chart ............................	65

©2012 Daikin. Illustrations and data cover theDaikin product at the time of publication and wereserve the right to make changes in design and construction at anytime withoutnotice. ™® The following are trademarks oregistered trademarks of their respective companies: BACnet from ASHRAE;LONMARK, LonTalk, LONWORKS, and the LONMARKlogo are managed, granted and used by LONMARK International under a license granted byEchelon Corporation; Compliant Scroll from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, OpenChoices, and SpeedTrol from Daikin.

2

AGZ 010B through 034B

IOMM 1155

Introduction

General Description

Daikin air-cooled water chillers are complete, self-contained automatic refrigerating units. Every unit is completely assembled, factory wired, charged, and tested. Each unit consists of air-cooled condensers, Copeland Compliant Scroll hermetic compressor, brazed plate-to-plate evaporator, and complete refrigerant piping. Liquid line components include sight-glass/moisture indicator, solenoid valve, and thermal expansion valve. Other features include a compressor heater, and evaporator heater for chilled water freeze protection.

The electrical control center includes all equipment protection and operating controls necessary for automatic operation. Condenser fan motors are three-phase (except single-phase on No. 1 fan with SpeedTrol option) and started by their own contactors and have inherent overload protection. Each compressor has solid-state motor protection for inherent thermal overload protection except Model AGZ 010 that has internal line breakage.

Software Version

This manual is based on software version AGZSU0102D. The software version can be displayed by pressing the Enter and Menu keys simultaneously. Exit by pressing Menu.

Inspection

Check all items carefully against the bill of lading. Inspect all units for damage upon arrival. Report shipping damage and file a claim with the carrier. Check the unit nameplate before unloading to be sure it agrees with the power supply available. Units are shipped FOB factory and Daikin is not responsible for physical damage after unit leaves the factory.

Note: Unit shipping and operating weights are listed on pages 18 and 19.

Installation

Note: Installation must be performed by trained, experienced personnel who are familiar

with local codes and regulations, especially concerning refrigerant release to th atmosphere.

! WARNING

Sharp edges and coil surfaces can cause personal injury. Avoid contact with them.

Handling

Be careful to avoid rough handling of the unit. Do not push or pull the unit from anything other than the base. Block the pushing vehicle away from the unit to prevent damage to the sheet-metal cabinet and end frame (see Figure 1). To lift the unit, lifting slots are provided in the base of the unit.

Arrange spreader bars and cables to prevent damage to condenser coils or cabinet (see Figure 2).

HAZARD IDENTIFICATION INFORMATION

! WARNING

Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.

!

CAUTION

Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.

IOMM 1155

AGZ 010B through 034B

3

Figure 1, Suggested Pushing Arrangement

BLOCKING REQUIRED

ACROSS FULL WIDTH

Figure 2, Suggested Lifting Arrangement

SPREADER BAR (2)

NOTE:: The fork lift slots can be used for lifting by inserting sufficiently strong pipe through them as shown in Figure 2.

Use the outboard slots on three-fan units and the only two on two-fan units.

PIPE SLUNG THRU

OPENINGS IN LEGS (2)

Location

Unit Placement

AGZ units are for outdoor applications and can be mounted on a roof or at ground level. Set units on a solid and level foundation. For roof-mounted applications, install the unit on a steel channel or I- beam frame to support the unit above the roof. For ground level applications, install the unit on a substantial base that will not settle. A one-piece concrete slab with footings extended below the frost line is recommended. Be sure the foundation is level (within 1/2” [13 mm] over its length and width). The foundation must support the operating weights listed in the Physical Data Tables on pages 18 and 19. It is recommended that the unit be raised a few inches with a suitable support, located at least under the mounting locations, to allow water to drain from under the unit and to facilitate cleaning under it.

Since its operation is affected by wind, the unit should be located so that its length is parallel with the prevailing wind. If this is not practical, use field fabricated wind deflectors.

Service Access

Each end of the unit must be accessible after installation for periodic service. Compressors, filterdriers, and liquid line solenoid valve are accessible from the end of the unit. High-pressure, lowpressure, and motor protector controls are on the compressor. Most operating, equipment protection, and starting controls are located in the unit control box.

The fan deck with the condenser fans and motors can be removed from the top of the unit.

4

AGZ 010B through 034B

IOMM 1155

Clearances

The flow of air to and from the

	condenser coil must not be limited.	Figure 3, Clearance requirements
	Restricting airflow or allowing air
	recirculation will result in a decrease in	4 Ft. (1220mm)
	unit performance and efficiency. There	Clearance for Air Inlet
	must be no obstruction above the unit
	that would deflect discharge air	4 Ft.	4 Ft.
	downward where it could be
		(1220mm)	(1220mm)
	recirculated back to the inlet of the	Clearance for	Clearance for
	condenser coil. The condenser fans are	Service Access	Service Access
	propeller type and will not operate with
	ductwork on the fan outlet.	4 Ft. (1220mm)
	Install the unit with enough side	Clearance for Air Inlet
	clearance for air entrance to the coil and
	for servicing. Provide service access to
	the evaporator, compressors, electrical
	control panel and piping components as
	shown in Figure 3. Do not block access to
	the unit with piping or conduit.
	Do not allow debris to accumulate near the	The recommended minimum side clearance between two units
	unit. Air movement may draw debris into
		is 8 feet (2440mm).

the condenser coil causing air starvation. Give special consideration to low ambient operation where snow can accumulate.

Keep condenser coils and fan discharge free of snow or other obstructions to permit adequate airflow.

Sound Isolation

The low sound levels of the AGZ chiller are suitable for most applications. When additional sound reduction is necessary, locate the unit away from sound sensitive areas. Avoid locations beneath windows or between structures where normal operating sounds may be objectionable. Reduce structurally transmitted sound by isolating water lines, electrical conduit and the unit itself. Use wall sleeves and rubber isolated piping hangers to reduce transmission of water or pump noise into occupied spaces. Use flexible electrical conduit to isolate sound through electrical conduit. Spring isolators are effective in reducing the low amplitude sound generated by the Discus semi-hermetic compressors and for unit isolation in sound-sensitive areas.

The unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit unless extra space is provided. The minimum clearance on each side of the unit is 6 feet (1828mm) when installed in a pit. The pit cannot be deeper than the unit.

The minimum clearance to a side wall or building taller than the unit height is 6 feet (1828mm) provided no solid wall above 6 feet (1828mm) tall is closer than 12 feet (3658mm) to the opposite side of the unit.

Vibration Isolators

Vibration isolators are recommended for

all roof-mounted installations or wherever vibration transmission is a consideration.

IOMM 1155

AGZ 010B through 034B

5

The unit should be initially placed on shims or blocks at the listed free height. When all piping, wiring, flushing, charging, etc. is completed, the springs are adjusted upward to loosen the blocks or shims that are then removed.

A rubber anti-skid pad is part of the isolator. Installation of spring isolators requires flexible piping connections and at least three feet of flexible conduit to avoid straining the piping and transmitting vibration and noise. These units cannot be bolted to isolators.

Table 1, Packaged & Remote Evaporator, R-I-S Isolator Locations, Aluminum Fins

				R-I-S, ALUMINUM FINS
	UNIT	OPER.		MOUNTING LOCATION			KIT PART
	SIZE	WGT	LF	RF	LB	RB	NUMBER
		LBS.
	010	1085	RP-3	RP-3	RP-3	RP-3	332325001
			Brick Red	Brick Red	Brick Red	Brick Red
	013	1170	RP-3	RP-3	RP-3	RP-3	332325001
			Brick Red	Brick Red	Brick Red	Brick Red
	017	1280	RP-3	RP-3	RP-3	RP-3	332325001
			Brick Red	Brick Red	Brick Red	Brick Red
	020	1505	RP-3	RP-3	RP-3	RP-3	332325002
			Lime	Lime	Brick Red	Brick Red
	025	1610	RP-3	RP-3	RP-3	RP-3	332325002
			Lime	Lime	Brick Red	Brick Red
	029	1800	RP-3	RP-3	RP-3	RP-3	332325002
			Lime	Lime	Brick Red	Brick Red
	034	2270	RP-3	RP-3	RP-3	RP-3	332325003
			Charcoal	Charcoal	Brick Red	Brick Red

Note: See dimension drawing for location of isolators.

Table 2, Packaged & Remote Evaporator, R-I-S Isolator Locations, Copper Fins

				R-I-S, COPPER FINS
	UNIT	OPER.		MOUNTING LOCATION				KIT PART
	SIZE	WGT	LF	RF		LB	RB	NUMBER
		LBS.
	010	1085	RP-3	RP-3		RP-3	RP-3	332325001
			Brick Red	Brick Red		Brick Red	Brick Red
	013	1170	RP-3	RP-3		RP-3	RP-3	332325001
			Brick Red	Brick Red		Brick Red	Brick Red
	017	1280	RP-3	RP-3		RP-3	RP-3	332325001
			Brick Red	Brick Red		Brick Red	Brick Red
	020	1505	RP-3	RP-3		RP-3	RP-3	332325002
			Lime	Lime		Brick Red	Brick Red
	025	1610	RP-3	RP-3		RP-3	RP-3	332325002
			Lime	Lime		Brick Red	Brick Red
	029	1800	RP-3	RP-3		RP-3	RP-3	332325004
			Charcoal	Charcoal		Lime	Lime
	034	2270	RP-3	RP-3		RP-3	RP-3	332325004
			Charcoal	Charcoal		Lime	Lime

Note: See dimension drawing for location of isolators.

6

AGZ 010B through 034B

IOMM 1155

Table 3, Packaged & Remote Evaporator, Spring Isolator Locations, Al. Fins

				SPRINGS, ALUMINUM FINS
UNIT	OPER.			MOUNTING LOCATION						KIT PART
	WGT
SIZE			LF	RF		LB		RB		NUMBER
	LBS.
010	1085		C1PE-1D-340	C1PE-1D-340			C1PE-1D-340		C1PE-1D-340
			Red	Red		Red		Red	332320001
013	1170		C1PE-1D-340	C1PE-1D-340			C1PE	-1D-340	C1PE-1D-340
			Red	Red		Red		Red	332320001
017	1280		C1PE-1D-510	C1PE-1D-510			C1PE	-1D-510	C1PE-1D-510
			Black	Black		Black		Black	332320003
020	1505		C1PE-1D-675	C1PE-1D-675			C1PE	-1D-340	C1PE-1D-340
			Dark Purple	Dark Purple		Red		Red	332320004
025	1610		C1PE-1D-675	C1PE-1D-675			C1PE	-1D-340	C1PE-1D-340
			Dark Purple	Dark Purple		Red		Red	332320004
029	1800		C1PE-1D-900	C1PE-1D-900			C1PE	-1D-510	C1PE-1D-510
			Dark Green	Dark Green		Black		Black	332320006
034	2270		C1PE-1D-900	C1PE-1D-900			C1PE	-1D-510	C1PE-1D-510
			Dark Green	Dark Green		Black		Black	332320006

Note:

1.See dimension drawing for location of isolators.

2.C1PE designates one spring per housing.

Table 4, Packaged & Remote Evaporator, Spring Isolator Locations, Cu. Fins

				SPRINGS, COPPER FINS
UNIT	OPER.			MOUNTING LOCATION						KIT PART
SIZE	WGT		LF	RF		LB	RB			NUMBER
	LBS.
010	1085		C1PE-1D-340	C1PE-1D-340		C1PE-1D-340			C1PE-1D-340
			Red	Red		Red	Red		332320001
013	1170		C1PE-1D-510	C1PE-1D-510		C1PE	-1D-510		C1PE-1D-510
			Black	Black		Black	Black		332320003
017	1280		C1PE-1D-510	C1PE-1D-510		C1PE	-1D-510		C1PE-1D-510
			Black	Black		Black	Black		332320003
020	1505		C1PE-1D-900	C1PE-1D-900		C1PE	-1D-510		C1PE-1D-510
			Dark Green	Dark Green		Black	Black		332320006
025	1610		C1PE-1D-900	C1PE-1D-900		C1PE	-1D-510		C1PE-1D-510
			Dark Green	Dark Green		Black	Black		332320006
029	1800		C1PE-1D-900	C1PE-1D-900		C1PE	-1D-675		C1PE-1D-675
			Dark Green	Dark Green		Dark Purple	Dark Purple		332320007
034	2270		C1PE-1D-1200	C1PE-1D-1200		C1PE-1D	-900	C1PE-1D-900
			Gray	Gray		Dark Green	Dark Green		332320008

Note:

1.See dimension drawing for location of isolators.

2.C1PE designates one spring per housing.

IOMM 1155

AGZ 010B through 034B

7

	Corner Weights										Remote Evaporator
	Packaged Chiller
											AGZ-	LF	RF	LB	RB
	AGZ-
		RF	LF	RB	LB						BM
	BS						RIB		RIF
											010A	257	264		236	243
	010A	279	275		267		263
								Control			013A	290	286		246	243
	013A	315	297		288		271
								Panel
											017A	312	309		266	263
	017A	344	323		316		297
											020A	446	443		241	240
	020A	502	475		271		257
							LIB		LIF		025A	453	449		245	243
	025A	531	496		301		282				029A	488	487		296	295
	029A	583	238		353	326
											034A	656	703		297	318
	034A	779	761		369	361
CP-1, Spring Isolator								RP-3, Rubber-in-Shear Isolator

1/2-13 TAP

	ø 3.38
	LOCATING PIN TO	4.13
	BE INSTALLED HERE
		5.50

ø .56 DIA. 2 HOLES

MOUNTING MOLDED IN
DURULENE. WEATHER
RESISTANT (WR)	2.50
1.75 (R)
.25	DRAWING NUMBER 3319880
	ALL DIMENSIONS ARE IN DECIMAL INCHES

8

AGZ 010B through 034B

IOMM 1155

Chilled Water System

Water Piping

Local authorities can supply the installer with the proper building and safety codes required for proper installation.

Install piping with minimum bends and changes in elevation to minimize pressure drop. Consider the following when installing water piping:

1.Vibration eliminators to reduce vibration and noise transmission to the building.

2.Shutoff valves to isolate the unit from the piping system during unit servicing.

3.Manual or automatic air vent valves at the high points of the system. Install drains at the lowest points in the system.

4.Maintaining adequate system water pressure (expansion tank or regulating valve).

5.Temperature and pressure indicators located at the unit to aid in unit servicing. Pressure gauge taps must be installed in the chilled water inlet and outlet piping or as shown in Figure 4.

6.A strainer or other means of removing foreign matter from the water before it enters the pump. Place the strainer far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer can prolong pump life and keep system performance up.

7.A 40-mesh strainer is required in the water line just before the inlet of the evaporator. This will help prevent foreign material from entering and decreasing the performance of the evaporator.

!CAUTION

If a separate disconnect is used for the 110V supply to the evaporator heating cable, mark the disconnect clearly so the disconnect is not accidentally shut off during cold seasons. Failure to do so can cause a failure of the evaporator.

8.The brazed plate evaporator has a thermostat and heating cable to prevent freeze-up down to -20 F (-29 C). The heating cable should be wired to a separate 110V supply circuit. As shipped from the factory, the heating cable is wired to the control circuit. Protect all water piping to the unit from freezing.

9.If the unit is used as a replacement chiller on a previously existing piping system, flush the system thoroughly before unit installation. Perform regular water analysis and chemical water treatment on the evaporator immediately at equipment start-up.

10.When glycol is added to the water system for freeze protection, the refrigerant suction pressure will be lower, cooling performance less, and water side pressure drop greater. If the percentage of glycol is high, or if propylene is used instead of ethylene glycol, the added pressure drop and loss of performance could be substantial. Reset the freezestat and low leaving water alarm temperatures. The freezestat is factory set to default at 38 F (3.3 C). Reset the freezestat setting to approximately 4 to 5 degrees F (2.3 to 2.8 degrees C) below the leaving chilled water setpoint temperature. See the section titled “Glycol Solutions” on page 12 for additional information concerning glycol.

11.Perform a preliminary leak check before insulating the piping and filling the system.

12.Include a vapor barrier on the piping insulation to prevent condensation and possible damage to the building structure.

IOMM 1155

AGZ 010B through 034B

9

Figure 4, Typical Field Evaporator Water Piping

Air

Vent

			Strainer
	Inlet
	P	Vibration	Isolation
			Valves
		Eliminators
	Outlet
			Flow
			Switch
	Drain

NOTES:

1.Chilled water piping within the unit enclosure must be insulated in the field.

2.Support piping independently of the unit and install per local codes.

System Volume

It is important to have adequate water volume in the system to provide an opportunity for the chiller to sense a load change, adjust to the change and stabilize. As the expected load change becomes more rapid, a greater water volume is needed. The system water volume is the total amount of water in the evaporator, air handling products and associated piping. If the water volume is too low, operational problems can occur, including rapid compressor cycling, rapid loading and unloading of compressors, erratic refrigerant flow in the chiller, improper motor cooling, shortened equipment life and other undesirable occurrences.

For normal comfort cooling applications, where the cooling load changes relatively slowly, we recommend a minimum system volume of three to four times the flow rate (GPM). For example, if the design chiller flow rate is 120 GPM, we recommend a minimum system volume of 360 to 480 gallons.

Since there are many other factors that can influence performance, systems may successfully operate below these suggestions. However, as the water volume decreases below these suggestions, the possibility of problems increases.

Variable Chilled Water flow

Variable chilled water flow systems are not recommended for this class of equipment due to limited unloading capability.

Flow Switch

Mount a water flow switch in the leaving water line to shut down the unit when water flow is interrupted.

A flow switch is available from Daikin										Figure 5, Flow Switch Installation
(part	number			017503300).			It	is	a
“paddle” type switch and adaptable to
pipe	sizes		down		to 1 1/4”		(32mm)
nominal. Certain minimum flow rates
are required to close the switch and are
listed in Table 5. Install the switch as
shown	in		Figure		5.	Connect			the
normally		open		contacts		of	the	flow
switch		in	the		unit	control		center
at terminals			4	and 5.		There	is	also a
set of normally closed contacts on the
switch that can be used for an indicator
light or		an	alarm		to	indicate		when
a “no-flow” condition						exists.		Freeze
protect any flow switch that is installed
outdoors.		Follow

10

AGZ 010B through 034B

IOMM 1155

installation instructions provided with the flow switch. Calibrate the flow switch to open at one-half of nominal flow rate.

NOTE:		Differential		pressure		switches		are not	recommended			for		outdo
installation. They are subject to damage from freezing.
Table 5, Flow Switch Settings
Pipe Size		inch	1 1/4	1 1/2	2	2 1/2	3	4	5	6		8
(NOTE !)		mm	32 (2)	38 (2)	51	63 (3)	76	102 (4)	127 (4)	153 (4)		204 (5)		125.0
Min.	Flow	gpm	5.8		7.5	13.7		18.0	27.5		65.0
		Lpm		1.3	1.7	3.1		4.1		6.2		14.8
Adjst.	No	gpm	3.7		5.0	9.5		12.5	19.0		50.0			101.0
	Flow	Lpm		0.8	1.1	2.2		2.8		4.3		11.4
Max.	Flow	gpm	13.3		19.2	29.0		34.5	53.0		128.0			245.0
		Lpm		3.0	4.4		6.6	7.8		12.0		29.1
Adjst.	No	gpm	12.5		18.0	27.0		32.0	50.0		122.0			235.0
	Flow	Lpm		2.8	4.1		6.1	7.3		11.4		27.7

NOTES:

1.A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose.

2.Flow rates for a 2-inch paddle trimmed to fit the pipe.

3.Flow rates for a 3-inch paddle trimmed to fit the pipe.

4.Flow rates for a 3-inch paddle.

5.Flow rates for a 6-inch paddle.

Water Connections

The unit has 3-inch holes for the chilled water piping to enter the unit. The connections are made to the evaporator water connections located within the unit. Chilled water piping within the unit must be insulated.

Refrigerant Charge

All units are designed for R-407C and are shipped with an operating charge. The operating charge for each unit is shown in the Physical Data Tables on pages 18 and 19.

Unit Component Location

Control Panel

Chilled Water

Inlet Connection

Tandem Scroll

Compressors

Chilled Water

Outlet Connection

			Charging Valve
	Evaporator
			Solenoid Valve, Expansion Valve
	Filter Drier		Optional Hot Gas Bypass Valve

IOMM 1155

AGZ 010B through 034B

11

Glycol Solutions

The use of glycol antifreeze solutions will decrease unit capacity and increase the pressure drop through the cooler. See Product Manual Catalog ACZAGZB1 for specific ratings and correction factors.

!

CAUTION

Do not use automotive grade antifreeze. Industrial grade glycols must be used. Automotive antifreeze contains inhibitors that will cause plating on the copper tubes within the chiller evaporator. The type, storage, disposal, and handling of glycol used must be consistent with local codes.

Evaporator Water Flow and Pressure Drop

Evaporator flow rate must fall between the minimum and maximum values shown in the evaporator pressure drop curve, Figure 6. Flow rates outside of these limits result in a chilled water Delta-T outside the operating range of the controller.

Measure the chilled water pressure drop through the evaporator at field-installed pressure taps. It is important not to include the effect of valves or strainers in these readings.

Do not vary the chilled water flow through the evaporator while the compressors are operating.

12

AGZ 010B through 034B

IOMM 1155

Figure 6, Evaporator Water Pressure Drop Curves

AGZ 010	AGZ 020
	AGZ 025
	AGZ 029
	AGZ 034
AGZ 017
AGZ 013

AGZ		Minimum Flow						Nominal Flow						Maximum Flow
	Flow Rate			Pressure			Flow Rate		Pressure				Flow Rate			Pressure
Model				Drop					Drop							Drop
	gpm	L/s		ft.		kPa	gpm	L/s	ft.		kPa		gpm		L/s	ft.	kPa
010	15.0	0.9				2.4		7.1	24.0		1.5				5.8	17.3		40.0	2.5
013	19.5	1.2				1.5		4.5	31.2		2.0				3.7	11.0		52.0	3.3
017	24.0	1.5				1.7		5.0	38.4		2.4				4.1	12.2		64.0	4.0
020	30.0	1.9				2.3		6.8	48.0		3.0				5.6	16.7		80.0	5.0
025	34.5	2.2				1.8		5.3	55.2		3.5				4.3	13.0		92.0	5.8
029	40.7	2.6				1.7		5.0	65.0		4.1				4.0	12.1		108.4	6.8
034	49.8	3.1				1.6		4.7	79.7		5.0				3.9	11.7		132.8	8.4

IOMM 1155

AGZ 010B through 034B

13

R-407C Units

AGZ chillers are available with R-407C refrigerant as non-ARI certified units. R-407C is a zeotropic blend of three compounds, and as such exhibits the characteristic of glide. It does not behave as one substance like R-22 does. Glide is the difference (in degrees F) between the beginning and end phase-change process in either the evaporator or condenser. During these processes, different ratios of the refrigerant’s components change phase from the beginning to the end of the process. The following functions, conditions and settings will differ from units charged with R-22.

1.Different physical data and electrical data

2.Polyolester lubricants are used instead of mineral oil.

3.The saturated pressure/temperature relationship

4.Control and alarm settings

5.Charging procedures

1.Lubrication. The units are factory-charged with polyoester (POE) lubricant and one of the following lubricants must be used if lubricant is to be added to the system:

Copeland Ultra 22 CC

Mobil EAL Arctic 22 CC

ICI EMKARATE RL RL 32CF

POEs are very hygroscopic and will quickly absorb moisture if exposed to air. Pump the lubricant into the unit through a closed transfer system. Avoid overcharging the unit.

2.Pressure/temperature relationship. See Table 6 on page 15 for the saturated pressuretemperature chart. Due to refrigerant glide, use the following procedures for superheat and subcooling measurement.

To determine superheat, only vapor must be present at the point of measurement, no liquid. Use the temperature reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at 78 psig, the chart shows the saturated vapor temperature to be 50.6 F. If the temperature is measured at 60 F, the superheat is 9.4 degrees F.

To determine subcooling, only liquid must be present, no vapor. Use the temperature reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at 250 psig, the chart shows the saturated liquid temperature to be 108.2 F. If the temperature is measured at 98 F, the subcooling is 10.2 degrees F.

3.Control and alarm settings. The software that controls the operation of the unit is factoryset for operation with R-407C.

4.Charging procedure. Packaged units are factory-charged with R-407C. Remote evaporator units have a nitrogen/helium holding charge, which must be removed prior to system charging procedure. Use the following procedure if recharging in the field is necessary:

Whether topping off a charge or replacing the circuit’s entire charge, always remove the refrigerant from the charging vessel as a liquid. Many of the cylinders for the newer refrigerants have a dip tube so that liquid is drawn off when the cylinder is in the upright position. Do not vapor charge out of a cylinder unless the entire contents will be charged into the system.

With the system in a 250-micron or lower vacuum, liquid can be charged into the high side. Initially charge about 80 percent of the system total charge.

Start the system and observe operation. Use standard charging procedures (liquid only) to top off the charge.

14

AGZ 010B through 034B

IOMM 1155

It may be necessary to add refrigerant through the compressor suction. Because the refrigerant leaving the cylinder must be a liquid, exercise care to avoid damage to the compressor. A sight glass can be connected between the charging hose and the compressor. It can be adjusted to have liquid leave the cylinder and vapor enter the compressor.

Table 6, R-407C Pressure/Temperature Chart

Pressure	Liquid Temp	Vapor Temp	Pressure	Liquid Temp	Vapor Temp
(PSIG)	(°F)	(°F)	(PSIG)	(°F)	(°F)
20	-10.7	1.5	150	74.8	84.9
22	-8.2	4.0	155	76.8	86.8
24	-5.7	6.4	160	78.7	88.7
26	-3.4	8.7	165	80.6	90.5
28	-1.1	11.0	170	82.5	92.3
30	1.1	13.1	175	84.3	94.0
32	3.2	15.2	180	86.1	95.8
34	5.3	17.2	185	87.8	97.5
36	7.3	19.2	190	89.6	99.1
38	9.2	21.0	195	91.3	100.7
40	11.1	22.9	200	92.9	102.3
42	12.9	24.7	205	94.6	103.9
44	14.7	26.4	210	96.2	105.4
46	16.4	28.1	215	97.7	107.0
48	18.1	29.7	220	99.3	108.4
50	19.7	31.3	225	100.8	109.9
52	21.3	32.9	230	102.3	111.4
54	22.9	34.4	235	103.8	112.8
56	24.4	35.9	240	105.3	114.2
58	25.9	37.4	245	106.7	115.6
60	27.4	38.8	250	108.2	116.9
62	28.8	40.2	255	109.6	118.2
64	30.2	41.6	260	111.0	119.6
66	31.6	43.0	265	112.3	120.9
68	33.0	44.3	270	113.7	122.1
70	34.3	45.6	275	115.0	123.4
72	35.6	46.9	280	116.3	124.7
74	36.9	48.1	285	117.6	125.9
76	38.2	49.3	290	118.9	127.1
78	39.4	50.6	295	120.2	128.3
80	40.6	51.8	300	121.4	129.5
82	41.9	52.9	305	122.7	130.7
84	43.0	54.1	310	123.9	131.8
86	44.2	55.2	315	125.1	133.0
88	45.4	56.3	320	126.3	134.1
90	46.5	57.4	325	127.5	135.2
92	47.6	58.5	330	128.7	136.3
94	48.7	59.6	335	129.8	137.4
96	49.8	60.7	340	131.0	138.5
98	50.9	61.7	345	132.1	139.6
100	51.9	62.7	350	133.2	140.6
105	54.5	65.2	355	134.3	141.7
110	57.0	67.7	360	135.4	142.7
115	59.5	70.0	365	136.5	143.7
120	61.8	72.3	370	137.6	144.7
125	64.1	74.6	375	138.7	145.7
130	66.4	76.7	380	139.8	146.7
135	68.5	78.8	385	140.8	147.7
140	70.7	80.9	390	141.8	148.7
145	72.8	82.9	395	142.9	149.6

IOMM 1155

AGZ 010B through 034B

15

Control Layout and Operation

Control Center

All electrical controls are enclosed in a weatherproof control center with tool-locked, hinged access doors. The left-hand section contains the microprocessor controller and control input and output terminals. All high-voltage components are located on the right side of the panel.

ON/OFF Switch	Control	24-Volt Trans.
	Transformer
MicroTech II		Non-Fused Disc.
		or
Controller
		Power Block
SpeedTrol Location		Fan
		Contactors
Field Connection		Fan
Terminals
		Protection
		Compressor Contactors

Start-up and Shutdown

Pre Start-up

1.The chilled-water system should be flushed and cleaned. Proper water treatment is required to prevent corrosion and organic growth.

2.Open all electric disconnects and check all electric connections for tightness.

3.Inspect all water piping for flow direction and correct connections at the evaporator.

4.Verify thermostat water temperature sensor is installed in the leaving water line (supply to building). On all AGZ units the sensor well and sensor are factory mounted.

5.Check compressor oil level. The oil level should be visible in the oil sight glass.

6.Check voltage of the unit power supply and make certain voltage is within 10% of nameplate rating. Check unit power supply wiring for proper ampacity and a minimum insulation temperature of 75 C. Check for proper phasing using a phase sequence meter.

7.Verify all mechanical and electrical inspections have been completed according to local codes.

8.Open control stop switch S1(off). Turn on the main power and control disconnect switches. This will energize crankcase heaters. Wait at least 24 hours before starting up unit.

9.Open all water flow valves and start the chilled water pump. Check all piping for leaks and vent the air from the evaporator as well as from the system piping. Flush the evaporator and system piping to obtain clean, noncorrosive water in the evaporator.

Start-up

1.Set temperature controller to the desired chilled water temperature. Set the chilled water Delta-T.

2.Start auxiliary equipment by turning on the following: time clock (if present), ambient thermostat and/or remote on/off switch, chilled water pump.

3.If the controller calls for cooling, the unit will begin the start-up sequence.

16

AGZ 010B through 034B

IOMM 1155

4.After running the unit for a short time, check the oil level in the compressor (1/4 to 1/3 of the glass), rotation of fans, and flashing in refrigerant sight glass.

5.Verify superheat temperature is at the factory setting of 8 to 12 degrees F (4.4 to 6.7 degrees C).

6.After system performance has stabilized, complete the current AGZ Start-Up Form (obtainable from the local Daikin sales office) to establish inception of warranty benefits. Return the form to Daikin through your sales representative.

Sequence of Operation

Start-Up

With the control circuit power on, 115V power is applied through the control circuit fuse F1 to the compressor crankcase heaters, the compressor motor protections and the primary of the 24V control circuit transformer. The 24V transformer provides power to the microprocessor controller.

When a remote time clock, manual switch, or the unit controller turns on the chilled water pump, the flow switch closes and satisfies the flow requirement. If the chilled water temperature is above the stage-on temperature, and all equipment protection devices are closed, the unit will start. The controller will operate the unit in response to the leaving chiller water temperature or reset signals that may be present.

Equipment Protection Alarms

The following conditions will shut down the unit and activate the alarm circuit:

No evaporator water flow			Low evaporator pressure
	High condenser pressure		Motor protection system
Phase voltage protection (Optional)			Outside ambient temperature
	Evaporator freeze protection		Sensor failures

The following alarms will limit unit operation:

Condenser pressure stage down, unloads unit at high discharge pressures

Low ambient lockout, shuts off unit at low ambient temperatures

Low evaporator pressure hold, holds stage #1 until pressure rises

Low evaporator pressure unload, shuts off stage #2

Unit Enable Selection

Enables unit operation from local keypad, digital input, or Building Automation System.

Unit Mode Selection

Selects standard cooling, ice, glycol, or test operation mode.

Condenser fan control

Control of condenser fans is provided by the MicroTech II controller. The control steps condenser fans based on discharge pressure.

Shutdown

As the leaving water control is satisfied, it will stage off the lag compressor unloading the unit. The second stage will de-energize the liquid line solenoid valve SV1 and shut off the lead compressor. The compressor crankcase heaters will energize when the compressors shut off, keeping the small amount of refrigerant in the plate heat exchanger from migrating to the compressor. See page 55 for detailed explanation of compressor staging.

IOMM 1155

AGZ 010B through 034B

17

Physical Data

AGZ-BS, R-407C

Table 7, Physical Data, AGZ 010BS through 017BS, Packaged, R-407C

	PHYSICAL DATA		AGZ MODEL NUMBER
		010B	013B	017B
	BASIC DATA
	Unit Capacity @ ARI Conditions (1), Tons (kW)	10.0 (36.2)	13.7 (48.2)	15.8 (55.6)
	Number Of Refrigerant Circuits	1	1	1
	Unit Operating Charge, R-407C Lb. (kg)	22.0 (10.0)	24.0 (10.9)	31.0 (14.1)
	Cabinet Dimensions, LxWxH, In.	73.6 x 46.3 x 50.8	73.6 x 46.3 x 50.8	73.6 x 46.3 x 50.8
	Cabinet Dimensions, LxWxH, (mm)	(1869) x (1176) x (1289)	(1869) x (1176) x (1289)	(1869) x (1176) x (1289)
	Unit Operating Weight, Lb. (kg)	1095 (498)	1190 (541)	1300 (591)
	Unit Shipping Weight, Lb. (kg)	1085 (493)	1170 (532)	1280 (582)
	Add'l Weight If Copper Finned Coils, Lb. (kg)	176 (80.0)	176 (80.0)	264 (120.0)
	COMPRESSORS
	Type	Scroll	Scroll	Scroll
	Nominal Horsepower	6.0 / 6.0	7.5 / 7.5	9.0 / 9.0
	Oil Charge Per Compressor of a Tandem Set, oz. (g)	60 (1701)	85 (2410)	110 (3119)
	CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT
	Standard Staging	0 – 50 – 100	0 – 50 – 100	0 – 50 – 100
	CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
	Coil Face Area, One of Two Sides, Sq. Ft. (M2)	30.3 (2.8)	30.3 (2.8)	30.3 (2.8)
	Finned Height x Finned Length, In.	84 x 52	84 x 52	84 x 52
	Finned Height x Finned Length, (mm)	(2134) x (1321)	(2134) x (1321)	(2134) x (1321)
	Fins Per Inch x Rows Deep:	16 x 2	16 x 2	16 x 3
	Pumpdown Capacity Lb. (kg)	35.3 (16.0)	35.3 (16.0)	52.9 (24.0)
	CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
	Number Of Fans - Fan Diameter, In. (mm)	2 – 26 (660)	2 – 26 (660)	2 – 26 (660)
	Number Of Motors - HP (kW)	2 – 1.0 (0.75)	2 – 1.0 (0.75)	2 – 1.0 (0.75)
	Fan And Motor RPM, 60 Hz	1140	1140	1140
	60 Hz Total Unit Airflow, CFM (l/s)	13950 (6584)	13950 (6584)	12000 (5664)
	DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
	Connection Size Victaulic, In. (mm)	2 (51)	2 (51)	2 (51)
	Water Volume, Gallons (L)	0.9 (3.6)	1.7 (6.3)	2.0 (7.6)
	Maximum Refrigerant Working Pressure, psig (kPa)	450 (3103)	450 (3103)	450 (3103)
	Maximum Water Pressure, psig (kPa)	350 (2413)	350 (2413)	350 (2413)

NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.

18

AGZ 010B through 034B

IOMM 1155

Table 8, Physical Data, AGZ 020BS through 034BS, Packaged, R-407c

	PHYSICAL DATA		AGZ MODEL NUMBER
		020B	025B	029B	034B
	BASIC DATA
	Unit Capacity @ ARI Conditions (1), Tons (kW)	20.6 (72.4)	22.7 (79.8)	27.7 (97.5)	34.0 (119.5)
	Number Of Refrigerant Circuits	1	1	1	1
	Unit Operating Charge, Lb. (kg)	38.0 (17.3]	42.0 (19.1)	47.0 (21.3)	50.0 (22.7)
	Cabinet Dimensions, LxWxH, In.	106.2x 46.3 x 50.8	106.2x 46.3 x 50.8	106.2x 46.3 x 58.8	106.2x 46.3 x 58.8
	Cabinet Dimensions, LxWxH, (mm)	(2697) x (1176) x	(2697) x (1176) x	(2697) x (1176) x	(2697) x (1176) x
		(1289)	(1289)	(1493)	(1493)
	Unit Operating Weight, Lbs. (kg)	1590 (723)	1635 (743)	1830 (832)	2315 (1052)
	Unit Shipping Weight, Lbs. (kg)	1570 (714)	1610 (732)	1800 (818)	2270 (1032)
	Add'l Weight If Copper Finned Coils, Lb. (kg)	426 (194)	426 (194)	508 (231)	508 (231)
	COMPRESSORS
	Type	Scroll	Scroll	Scroll	Scroll
	Nominal Horsepower	12.0 / 12.0	13.0 / 13.0	15.0 / 15.0	20.0 / 20.0
	Oil Charge Per Compressor of a Tandem Set,	110 (3119)	110 (3119)	110 (3119)	158 (4479)
	oz. (g)
	CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
	Standard Staging	0 –50 - 100	0 – 50 – 100	0 – 50 – 100	0 – 50 – 100
	CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
	Coil Face Area, One of Two Sides, Sq. Ft. (M2)	49.0 (4.6)	49.0 (4.6)	58.3 (5.4)	58.3 (5.4)
	Finned Height x Finned Length, In.	84 x 84	84 x 84	100 x 84	100 x 84
	Finned Height x Finned Length, (mm)	(2134) x (2134)	(2134) x (2134)	(2545 ) x (2134)	(2545 ) x (2134)
	Fins Per Inch x Rows Deep	16 x 3	16 x 3	16 x 3	16 x 3
	Pumpdown Capacity, Lb. (kg)	85.4 (38.8)	85.4 (38.8)	101.6 (46.2)	101.6 (46.2)
	CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
	Number Of Fans - Fan Diameter, In. (mm)	3 – 26 (660)	3 – 26 (660)	3 – 26 (660)	3 – 26 (660)
	Number Of Motors - HP (kW)	3 – 1.0 (0.75)	3 – 1.0 (0.75)	3 – 1.0 (0.75)	3 – 1.0 (0.75)
	Fan And Motor RPM, 60 Hz	1140	1140	1140	1140
	60 Hz Total Unit Airflow, CFM (l/s)	20925 (9877)	20925 (9877)	19800 (9346)	19800 (9346)
	DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
	Connection Size Victaulic, In. (mm)	2 (51)	2 (51)	2 (51)	2 (51)
	Water Volume, Gallons (L)	2.2 (8.2)	3.0 (11.5)	4.0 (15.1)	5.6 (21.0)
	Max. Refrigerant Working Pressure, psig (kPa)	450 (3103)	450 (3103)	450 (3103)	450 (3103)
	Maximum Water Pressure, psig (kPa)	350 (2413)	350 (2413)	350 (2413)	350 (2413)

NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.

IOMM 1155

AGZ 010B through 034B

19

AGZ-BM, R-407C

Table 9, Physical Data, AGZ 010BM through 017BM, Remote Evaporator, R-407C

	PHYSICAL DATA		AGZ MODEL NUMBER
		010B	013B	017B
	BASIC DATA
	Unit Capacity @ ARI Conditions (1), Tons (kW)	10.0 (36.2)	13.7 (48.2)	15.8 (55.6)
	Number Of Refrigerant Circuits	1	1	1
	Unit Operating Charge, Lb. (kg)	13 (5.9)	14 (5.3)	17 (7.7)
	Cabinet Dimensions, LxWxH, In.	73.6 x 46.3 x 50.8	73.6 x 46.3 x 50.8	73.6 x 46.3 x 50.8
	Cabinet Dimensions, LxWxH, (mm)	(1869) x (1176) x (1289)	(1869) x (1176) x (1289)	(1869) x (1176) x (1289)
	Unit Operating Weight, Lb. (kg)	950 (431)	1276 (579)	1278 (580)
	Unit Shipping Weight, Lb. (kg)	1025 (465)	1350 (613)	1363 (619)
	Add'l Weight If Copper Finned Coils, Lb. (kg)	[176 (80.0)	[176 (80.0)	[264 (120.0)
	COMPRESSORS
	Type	Scroll	Scroll	Scroll
	Nominal Horsepower	6.0 / 6.0	7.5 / 7.5	9.0 / 9.0
	Oil Charge Per Compressor of a Tandem Set, oz. (g)	60 (1701)	85 (2410)	110 (3119)
	CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT
	Standard Staging	0 – 50 – 100	0 – 50 – 100	0 – 50 – 100
	CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
	Coil Face Area, One of Two Sides, Sq. Ft. (M2)	30.3 (2.8)	30.3 (2.8)	30.3 (2.8)
	Finned Height x Finned Length, In.	84 x 52	84 x 52	84 x 52
	Finned Height x Finned Length, (mm)	(2134) x (1321)	(2134) x (1321)	(2134) x (1321)
	Fins Per Inch x Rows Deep	[16 x 2	16 x 2	16 x 3
	Pumpdown Capacity Lb. (kg)	35.3 (16.0)	35.3 (16.0)	52.9 (24.0)
	CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
	Number Of Fans - Fan Diameter, In. (mm)	2 – 26 (660)	2 – 26 (660)	2 – 26 (660)
	Number Of Motors - HP (kW)	2 – 1.0 (0.75)	2 – 1.0 (0.75)	2 – 1.0 (0.75)
	Fan And Motor RPM, 60 Hz	1140	1140	1140
	60 Hz Total Unit Airflow, CFM (l/s)	13950 (6584)	13950 (6584)	12000 (5664)
	REMOTE DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
	Water Connection Size Victaulic, In. (mm)	2 (51)	2 (51)	2 (51)
	Water Volume, Gallons (L)	0.9 (3.6)	1.7 (6.3)	2.0 (7.6)
	Liquid Line Conn. Braze, inches	1.125	1.125	1.125
	Suction Line Conn. Braze, Inches	2.125	2.125	2.125
	Temperature Sensor Conn. NPT, Inches	0.75	0.75	0.75
	Dry Weight, lbs (kg)	50 (22)	75 (34)	87 (39)
	Operating Weight, lbs (kg)	58 (26)	88 (40)	109 (49)
	Maximum Refrigerant Working Pressure, psig (kPa)	450 (3103)	450 (3103)	450 (3103)
	Maximum Water Pressure, psig (kPa)	450 (3103)	450 (3103)	450 (3103)
	Vent and Drain Conn.	Field	Field	Field

NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range and does not take field-installed lines into account.

20

AGZ 010B through 034B

IOMM 1155