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Installation Instructions
Part Nos. 30HX-900---008, 30GX-900---004
(60 Hz — 115-v Control)
Part Nos. 30HX-900---009, 30GX-900---005
(50 or 60 Hz — 230-v Control)
CONTENTS
Page
SAFETY CONSIDERATIONS ...................1
INTRODUCTION ..............................1
INSTALLATION ............................. 1-6
Step 1 — Examine Package Contents .........1
Step 2 — Install Piping .......................2
• REMOVE MINIMUM LOAD PORT PLUGS AND
INSTALL FITTINGS
• INSTALL PIPING
• INSTALL BALL AND SOLENOID VALVES
• CONNECT PIPING
Step 3 — Dehydrate and Recharge Circuit .....3
Step 4 — Install Control Wiring ...............4
• 30HX UNITS
• 30GX UNITS
• ALL UNITS
Step 5 — Configure Unit for Minimum
Load Control ..............................6
Step6—TestMinimum Load Relay
Outputs ...................................6
Step 7 — Adjust Setting of Minimum Load
Ball Valve ..................................6
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equip-
ment 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 pre-
cautions in the literature and on tags, stickers, and labels at-
tached 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 perform-
ing maintenance or service.
IMPORTANT: When removing refrigerant, use an
approved refrigerant recovery device. Do not vent re-
frigerant into the atmosphere.
INTRODUCTION
The minimum load control accessory allows 30HX and
30GX chillers to have their capacities decreased below the
standard fully unloaded condition. The accessory provides
more precise control of leaving fluid temperature during light
load conditions.
The 30GX and 30HX chillers have a dual-circuit design.
Each minimum load control accessory package contains the
items required for both circuits. Because of an automatic lead/
lag feature on the chillers, the accessory should be installed
on both circuits.
INSTALLATION
Step 1 — Examine Package Contents —
Pack-
age includes solenoid valves, ball valves, Swagelok con-
nectors, and instructions. The kit for 30GX units also con-
tains a junction box, junction box cover, and conduit. Examine
each item. If any part is damaged or missing, file a claim
immediately with the shipper. See Table 1 for accessory pack-
age contents and field-supplied material.
Table 1 — Accessory Package Contents and Field-Supplied Material
ACCESSORY PACKAGE
COMPONENTS
ACCESSORY PART NUMBER
30HX-900---008 30HX-900---009 30GX-900---004 30GX-900---005
Solenoid Valve (2) EF23JX212 (2) EF23JX231 (2) EF23JX212 (2) EF23JX231
Ball Valve (2) EP71BA201 (2) EP71BA201 (2) EP71BA201 (2) EP71BA201
Swagelok Connector (4) DC09CA307 (4) DC09CA307 (2) DC09CA307 (2) DC09CA307
Junction Box — — HX30FZ001 HX30FZ001
Junction Box Cover — — HX38ZZ001 HX38ZZ001
Watertight Conduit — — 99CD2121AC028 99CD2121AC028
FIELD SUPPLIED MATERIAL — REQUIRED PARTS (Ordered Separately)
5
⁄
8
-in. OD Copper Tubing, Wiring, Conduit,
Thread Sealant, Electrical Supplies
Field Supplied
30GX080-176
30HX076-271
Minimum Load Control Accessory
50/60 Hz
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
Tab 5c
PC 903 Catalog No. 563-056 Printed in U.S.A. Form 30GX,HX-2SI Pg 1 1-97 Replaces: New