30XA080-500
30XA080-500
Minimum Load Control Accessory
Installation Instructions
Part No: 00EFN900002700A, 00EFN900002800A, 00EFN900002900A
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location.
Only trained, qualified installers and service technicians
should install, start up, and service this equipment.
When working on air-conditioning equipment, observe
precautions in the literature and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Use care in handling equipment.
Be sure power to equipment is shut off before performing
maintenance or service to avoid electrocution. Lock out
and safety-tag all disconnects. There may be more than one
disconnect.
GENERAL
This control accessory reduces 30XA chiller capacities below the standard lowest capacity step. This capacity reduction
provides more precise control of leaving fluid temperature
during light load conditions.
The minimum load control solenoid valve limits the amount
of gas that can be bypassed from the condenser without
impacting oil return.
One accessory package is required for 30XA080-350 units.
Two accessory packages are required for 30XA400-500 units
to accommodate connections for three refrigerant circuits. See
Table 1 for accessory package usage.
Table 1 — Accessory Package Usage
30XA UNIT SIZE ACCESSORY PART NO.
080-240 00EFN9000002700A
260-300 00EFN9000002800A
325, 350 00EFN9000002900A
400
450, 500
00EFN9000002700A,
00EFN9000002800A
00EFN9000002800A,
00EFN9000002900A
INSTALLATION
Examine the package contents for correct part numbers. If
any of the components are damaged, file a claim with the
shipping company and notify your Carrier representative.
See Table 2A, 2B, or 2C for package contents. See Fig. 1 for
dimensional drawings of tubes included in the kit.
The following material is field supplied:
5
•
/8 in. OD copper tubing
5
•
/8 in. OD copper tube elbows and couplings
(as required)
• Loctite 554 thread sealing compound
• Parker Super O-lube O-ring lubricant
Install the Solenoid Valve Tube Assembly
1. Remove refrigerant charge from the circuits using an
approved refrigerant recovery device before proceeding
with this installation. Follow good piping practices.
2. Locate the discharge manifold for minimum load
piping on the side of the coil V for each circuit as
shown in Fig. 2. Locate the
the top of the cooler for each circuit. See Fig. 3.
3. Remove the
1
/2 in. NPT pipe plugs from the top of the
cooler. Use the thread sealing compound and install
one 1 in.-14 O-ring seal (ORS) x
for each circuit. Lightly lubricate each O-ring with
O-lube and attach the tube assembly to each adapter.
See Fig. 3. Be sure to attach the correct tube assembly
to the cooler. Refer to the usage column in Tables 2A,
2B, and 2C for tube assembly part number corresponding to the unit size and circuit. The nut on the tube
assembly should be torqued to 30 ft-lb (40 N-m).
4. Remove the trim panel on the discharge manifold for
minimum load piping on the side of the coil V. Use a
tubing cutter to cut 1
1
/2 in. out from the discharge manifold for each circuit. See Fig. 4. Braze a tee in between
the gap and, depending on the routing of the hot gas
bypass tubing, have the tee’s remaining port facing either
left or right.
5. Use field-supplied
(as required) to pipe from the solenoid valve outlet to the
5
/8 in. port of the tee on the discharge manifold. Use the
provided
5
/8 in. tubing clamps to secure the tubing to the
5
/8 in. OD copper tubing and fittings
unit frame as necessary.
6. When piping is completed, leak test the assembly.
7. Evacuate, dehydrate, and recharge each circuit. Be sure to
use the correct type and amount of refrigerant listed in the
nameplate data and base unit documentation.
8. Restore power to the unit.
1
/2 in. NPT pipe plugs on
1
/2 in. NPT adapter
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
Ta b 5 c
Catalog No. 04-53300010-01 Printed in U.S.A. Form 30XA-6SI Pg 1 12-06 Replaces: New
Table 2A — Contents of Accessory Kit, Part No. 00EFN900002700A
PART NUMBER QUANTITY DESCRIPTION USAGE
00PSN500171700A 2
30GX5034892 2 1 in. -14 ORS x
Tube assembly including solenoid valve,
ball valve, and 90 degree bend tube assembly
1
/2 in. NPT adapter One per circuit. Cooler shell minimum load port.
00PPG000011600A 2 Solenoid coil assembly
KA66AA062 4
DE40BA705 21
5
/8 in. tube clamp
1
/8 in. x 1 1/8 in. x 5/8 in. Tee
TH70400410 2 Cable assembly
00PPN500000401A 4 No. 10 Screw Mount tube clamps
32GB500432E 1 HGBP/Pump board Mount in control box
TH70400864 1 Harness assembly Wiring between TB5 and HGBP/Pump board
HH83ZB001 1 24 v circuit breaker (CB14) Mount on display bracket in control box
A6X10004352 4 No. 8 screw Mount HGBP/Pump board
A6X10004434 4 Board mounting standoff
TH70400852 1 Communication cable assembly
HY89TB010 3Wire nut
LEGEND
HGBP — Hot Gas Bypass
ORS — O-Ring Seal
TB — Terminal Block
One per circuit (circuit A and B for 30XA400).
Cooler shell minimum load port, connect to
30GX5034892 adapter.
One per circuit. Plug onto solenoid valve stub
on 00PSN500171700A tube assembly.
Secure minimum load piping to the frame
as required.
One per circuit. Discharge manifold on the side
of condenser coil V.
One per circuit. Connect to solenoid coil
assembly and terminal block TB5 in control box.
Mount HGBP/Pump board (30XA140-240,400:
all voltages and 30XA080-120: 200/230 v, 380 v)
30XA140-240,400: all voltages and
30XA080-120: 200/230 v, 380 v
Splice communication cable
(30XA080-120: 460 v, 575 v)
Table 2B — Contents of Accessory Kit, Part No. 00EFN900002800A
PART NUMBER QUANTITY DESCRIPTION USAGE
00PSN500171700A 2
30GX5034892 2 1 in. -14 ORS x
Tube assembly including solenoid valve,
ball valve, and 90 degree bend tube assembly
1
/2 in. NPT adapter One per circuit. Cooler shell minimum load port.
00PPG000011600A 2 Solenoid coil assembly
5
KA66AA062 4
DE40BA705 21
/8 in. tube clamp
1
/8 in. x 11/8 in. x 5/8 in. Tee
TH70400410 2 Cable assembly
00PPN500000401A 4 No. 10 Screw Mount tube clamps
32GB500432E 1 HGBP/Pump board Mount in control box
TH70400864 1 Harness assembly Wiring between TB5 and HGBP/Pump board
HH83ZB001 1 24 v circuit breaker (CB14) Mount on display bracket in control box
A6X10004352 4 No. 8 screw Mount HGBP/Pump board
A6X10004434 4 Board mounting standoff
TH70400852 1 Communication cable assembly 30XA260-300,400,450,500: all voltages
HY89TB010 3 Wire nut Splice communication cable
LEGEND
HGBP — Hot Gas Bypass
ORS — O-Ring Seal
TB — Terminal Block
One per circuit (circuit A and B for 30XA400).
Cooler shell minimum load port, connect to
30GX5034892 adapter.
One per circuit. Plug onto solenoid valve stub
on 00PSN500171700A tube assembly.
Secure minimum load piping to the frame
as required.
One per circuit. Discharge manifold on the side
of condenser coil V.
One per circuit. Connect to solenoid coil
assembly and terminal block TB5 in control box.
Mount HGBP/Pump board (30XA260-300,400,450,
500: all voltages)
2
Table 2C — Contents of Accessory Kit, Part No. 00EFN900002900A
PART NUMBER QUANTITY DESCRIPTION USAGE
00PSN500175200A 2
30GX5034892 2 1 in. - 14 ORS x
Tube assembly including solenoid valve,
ball valve, and 90 degree bend tube assembly
1
/2 in. NPT adapter One per circuit. Cooler shell minimum load port.
00PPG000011600A 2 Solenoid coil assembly
One per circuit (Circuit A and B for 30XA325, 350,
circuit A and C for 30XA450, 500). Cooler shell
minimum load port, connect to 30GX5034892 adapter.
One per circuit. Plug onto solenoid valve stub
on 00PSN500171700A tube assembly.
KA66AA062 4 5/8 in. tube clamp
DE40BA705 21
1
/8 in. x 11/8 in. x 5/8 in. Tee
TH70400410 2Cable assembly
Secure minimum load piping to the frame
as required.
One per circuit. Discharge manifold on the side
of condenser coil V.
One per circuit. Connect to solenoid coil
assembly and terminal block TB5 in control box.
00PPN500000401A 4 No. 10 screw Mount tube clamps
32GB500432E 1 HGBP/Pump board Mount in control box
TH70400864 1 Harness assembly Wiring between TB5 and HGBP/Pump board
HH83ZB001 1 24V circuit breaker (CB14) Mount on display bracket in control box
A6X10004352 4 No. 8 screw Mount HGBP/Pump board
A6X10004434 4 Board mounting standoff
Mount HGBP/Pump board (325,350,450,500:
all voltages)
TH70400852 1 Communication cable assembly 30XA325,350,450,500: all voltages.
HY89TB010 3 Wire nut Splice communication cable
LEGEND
HGBP — Hot Gas Bypass
ORS — O-Ring Seal
TB — Terminal Block
SOLENOID VALVE
BALL VALVE
TUBE ASSEMBLY 00PSN500175200A
SOLENOID VALVE
TUBE ASSEMBLY 00PSN500171700AA
NOTE: Dimensions are in mm [in.].
Fig. 1 — Dimensions of Tube Assemblies Provided in Accessory Kit
a30-4499
BALL VALVE
a30-4500
3
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