30RB060-390
Minimum Load Control Accessory
Installation Instructions
Part No: 00EFN900000100A
SAFETY CONSIDERATIONS
INSTALLATION
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical com-
ponents and equipment location.
Examine the package contents for correct part numbers. If
any of the components are damaged, file a claim with the
shipping company and notify a Carrier representative.
Only trained, qualified installers and service technicians
should install, start up, and service this equipment.
See Table 2 for package contents. See Fig. 1 for dimensional
drawings of tubes included in the kit.
When working on air-conditioning equipment, observe
precautions in the literature, on tags, stickers, and labels
attached to the equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Use care in handling equipment.
The following material is field supplied:
•
1/2 in. OD copper tubing
• standard 1/2 in. copper tube elbows and couplings as required
Install the Solenoid Valve
WARNING
WARNING
Shut off all power to the unit. Lock out and safety-tag all
disconnects. Remove refrigerant charge from the circuits
using an approved refrigerant recovery device before
proceeding with this installation. Follow good piping
practices. Severe personal injury could result.
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all discon-
nect locations to alert others not to restore power until work
is completed.
1. Shut off power to the unit.
GENERAL
2. Remove refrigerant charge from the unit.
3. Locate the factory-supplied stub on the discharge line for
IMPORTANT: This accessory can only be used on units
configured for Cooler Fluid Type (Configuration
SERVFLUD = 1 [Water]). The minimum load control
accessory (HGBP) is not allowed on units configured for
Cooler Fluid Type (Configuration SERVFLUD = 2
[Brine]).
1
each circuit. Locate the /2 in. NPT pipe plugs at the
blank end of the cooler for 30RB110 circuit B and
for both circuits A and B on 30RB060-300 units. See
Fig. 2.
4. Remove the 1/2 in. NPT pipe plugs from the blank end
of the cooler. Use an appropriate thread sealing
compound and install one 1 in. — 14 O-ring seal
adapter for each circuit. Lightly lubricate each O-ring
This control accessory reduces 30RB chiller capacities be-
low the standard lowest capacity step. This capacity reduction
provides more precise control of leaving fluid temperature
during light load conditions.
The solenoid valve limits the amount of gas that can be
bypassed from the condenser without impacting oil return.
5
and attach a /8 in. O-ring seal tube assembly to each
adapter. This nut should be torqued to 30 ft-lb (40 N-
m). For 30RB110 circuit A size only, use a tubing cut-
ter to cut off the end of the stub tube. See Fig. 3.
5. Assemble the hot gas bypass line in the following order:
One accessory package is required for 30RB060-190 units
and for each module of duplex units 30RB315-390. Two
accessory packages are required for 30RB210-300 units to
accommodate connections for all three refrigerant circuits. See
Table 1 for modular unit combinations.
a. Remove the discharge stub tube and braze the cor-
rect beaded tube in place.
b. Braze the ball valve to the beaded tube.
c. Braze the solenoid valve into the line.
d. Using field-supplied tubing, connect the solenoid
valve to the low side connection, either the cooler
or the liquid line.
Table 1 — Modular Unit Combinations
UNIT SIZE
30RBA315
30RBA330
30RBA345
30RBA360
30RBA390
MODULE A
30RBA160
30RBA170
30RBA170
30RBA190
30RBA190
MODULE B
30RBA160
30RBA160
30RBA170
30RBA170
30RBA190
e. Clamp the 5/8-in. tube to the rail. See Fig. 4 and 5.
1
Use field-supplied /2 in. OD copper tubing and fit-
tings (as required) to plumb from the solenoid valve
outlet to either the adapter tube in the cooler or stub
tube in the liquid line depending on unit size. Tube
support brackets and 1/2 in. tubing clamps are provided
with the kit. Install brackets to the bottom of the coil
bases to support tubing.
NOTE: An “A” in the model number indicates the design series.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300047-01 Printed in U.S.A. Form 30RB-16SI Pg 1 3-10 Replaces: 30RB-4SI
.
IMPORTANT: The valve is direction specific and must
have the arrow pointing toward the cooler. The solenoid
valve will not properly seat if installed backwards.
6. Dehydrate and recharge each circuit.
7. Restore power to the unit.
NOTE: When piping is completed, leak test the assembly.
Then evacuate, dehydrate, and recharge the circuit using
approved refrigeration practices. Be sure to use the correct
type and amount of refrigerant listed in the nameplate data
and base unit documentation.
Install Control Wiring (See Fig. 6 and 7)
1. One control wire harness is supplied per circuit.
Secure the DIN connector end on the solenoid valve
coil with the screw in the connector. Verify the square
rubber gasket is in place to ensure connection remains
watertight.
DISCHARGE STUB
2. Route the other end of the cable to the main control panel
(where the display is located). For the circuit A solenoid,
connect leads to TB5-7 and TB5-13. For the B circuit
solenoid, connect leads to TB5-8 and TB5-13. For the
C circuit solenoid (30RB210-300 only), connect the leads
to TB5-6 and TB5-13. In all cases the black wire from the
solenoid must be connected to TB5-13 to ensure correct
polarity. Incorrect polarity will damage the control
boards.
Fig. 2 — Typical Stub Tube View
COOLER STUB
3. For 30RB250-300 units only, locate fan board 3 (FB3) in
the C circuit power control panel. Route the C circuit
solenoid cable to the panel. Locate the orange and brown
wires from channel 7 of connector J3 on this board.
Connect the red wire from the solenoid to the orange wire
from the board. Connect the black wire from the solenoid
to the brown wire from the board.
Configure Unit for Minimum Load Control —
The control must be configured for the minimum load control
operation. Use the scrolling marquee display to configure the
system.
Fig. 3 — Stub Tube for Circuit A of Size 110
IMPORTANT: This accessory can only be used on units
configured for Cooler Fluid Type (Configuration
SERVFLUD = 1 [Water]). The minimum load control
accessory (HGBP) is not allowed on units configured for
Cooler Fluid Type (Configuration SERVFLUD = 2
[Brine]).
BALL VALVE
1. Set the Enable/Off/Remote switch to OFF position.
2. Press
until the screen is blank and use the
ESCAPE
arrow key to select the Configuration mode LED (light
emitting diode).
3. Press
, then use arrow key to select the
ENTER
sub-mode ‘UNIT’, then press Enter key.
4. Press the down arrow key until ‘HGBP’ is displayed.
5. Press
key twice. The word ‘PASS’ and
ENTER
‘WORD’ will flash.
6. Press 0 1 1 1 then
key so that ‘0’ flashes.
ENTER
7. Use arrow keys to change value to one of the following
configurations:
CONFIGURATION
1
DESCRIPTION
Used during chiller start-up only
Used during start-up and for close
control of leaving fluid temperature
Used during start-up, for close control
of the leaving fluid temperature and for
high ambient unloading
Fig. 4 — Typical View of 5/8 in. Swage Tube,
5/8 in. Clamp and Solenoid Valve Installed
2
3
3
8. Press the
9. Press the
key.
the Service Test mode to verify proper operation of the
solenoid(s) (illuminate the Service Test LED, enter the TEST
mode, enable the test request, ‘T.REQ’ and test outputs
‘HGB.A,’ ‘HGB.B’ and for 30RB210-300 only, ‘HGB.C.’
ENTER
ESCAPE
key until ‘DISP’ is displayed. Wait
10 seconds and cycle the control power using the On/Off
switch.
Once the outputs have been tested, the installation is complete.
Return the Enable/Off/Remote contact switch to the desired
position.
The chiller is now configured for minimum load valve control.
Test Minimum Load Relay Output — Use the Scroll-
ing Marquee display, the instructions given in the Controls,
Start-Up, Operation Service and Troubleshooting manual and
SOLENOID VALVE
5/8 IN.
TUBING CLAMP
(TYPICAL)
SOLENOID VALVE
BALL VALVE
FIELD-
SUPPLIED
TUBING
BALL VALVE
CIRCUIT B
00PPN500000600A
TUBE ASSEMBLY
5/8 IN.
TUBING CLAMP
(TYPICAL)
CIRCUIT A
30RB060-100
TUBE SUPPORT BRACKET
SOLENOID VALVE
BALL VALVE
SOLENOID VALVE
BALL VALVE
FIELD-SUPPLIED
TUBING
1/2 IN. TUBING
CIRCUIT B
CLAMP
(TYPICAL)
00PPN500000600A
TUBE ASSEMBLY
CIRCUIT A
30RB110
Fig. 5 — Typical Piping Brackets
4
SOLENOID VALVE
TUBE SUPPORT
BRACKETS
BALL VALVE
FIELD-SUPPLIED
TUBING
SOLENOID VALVE
BALL VALVE
CIRCUIT B
00PPN500000600A
TUBE ASSEMBLY
CIRCUIT A
30RB120-190
SOLENOID VALVE
TUBE SUPPORT BRACKETS
1/2 IN.
TUBING CLAMP (TYPICAL)
BALL VALVE
FIELD-SUPPLIED
TUBING
1/2 IN. CLAMP (TYPICAL)
SOLENOID VALVE
TUBE SUPPORT BRACKETS
BALL VALVE
BALL VALVE
SOLENOID VALVE
FIELD-SUPPLIED
TUBING
FIELD-SUPPLIED
TUBING
CIRCUIT A
5/8 IN.
TUBING CLAMP
(TYPICAL)
00PPN500000600A
TUBE ASSEMBLY
CIRCUIT C
CIRCUIT B
30RB210-300
Fig. 5 — Typical Piping Brackets (cont)
5
LEGEND
MLV — Minimum Load Valve
TB — Terminal Block
Fig. 6 — Main Base Board Wiring for
Circuits A and B, 30RB060-300
LEGEND
MLV — Minimum Load Valve
TB — Terminal Block
Fig. 7 — Fan Board 3 Wiring for Circuit C, 30RB210-300
6
Copyright 2010 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300047-01
Printed in U.S.A.
Form 30RB-16SI
Pg 8
3-10
Replaces: 30RB-4SI
|