American Standard CH530 Figure 37. Rotary valve in drain position

CDHF-SVU01C-EN

98

Maintenance

DO NOT LEAVE GREASE FITTINGS

INSTALLED.

If grease fittings have been used for

this procedure then they MUST BE

REMOVED before returning the unit

to service. Grease fittings are not

vacuum-tight and will become a leak

path.

9. Using a clean wooden dowel or

other similar tool, remove excess

grease from the remaining open

lubrication port.

10. Clean and then lightly coat the

threads of the plug with Rheolube

grease and re-install it into the

lubrication port. Tighten the

plug to hand tight plus 1/4 to 1/2

turn.

11. Before reconnecting the vane

linkage, grasp the tang operator

arm and manually operate the

vane assembly. If it is now

difficult to move, then the tang

operator may have become

“hydraulically locked” because of

excess grease in the assembly.

This situation could cause

damage to the o-rings of the

assembly. If this occurs then

remove one of the lubrication

plugs, remove some of the

grease, then re-install the plug.

12. Reconnect the linkage to the tang

operator arm. Ensure the spacer

washers between the linkage and

the arm are properly placed and

that the assembly does not bind.

Re-install any insulation that was

cut or removed. The unit may be

restarted.

To service the 1st and 2nd stage tang

operators on CDHF extended

capacity chillers with 1470 or 1720

compressors.

The 1st and 2nd stage rotary inlet

guide vane tang operators of the

extended capacity chillers also

require periodic lubrication, at least

annually, with R123 compatible

Rheolube grease. These actuators

have two 1/8" NPT plugs located 180

degrees apart, with one on the top

Figure 37. Rotary valve in drain position

Front View with Refrigerant Pump

and the other on the bottom of the

operator base. Use the same

procedure as described above,

except that it will be necessary to

temporarily disconnect the vane

actuators from the tang operator

arms in order to test for a

“hydraulically locked” condition.

The oil valve block rotary valve uses

dual O-Rings to seal to atmosphere.

These should be manually lubricated

by removing the pipe plug at the

valve lubrication port and placing a

few drops of Trane OIL00022 in the

cavity. Be sure to reinstall the pipe

plug when lubrication is completed.

Contents

Main Warnings and Cautions Contents Typical Product Description Block Unit Nameplate Literature change About this manual Page Page Commonly Used Acronyms Figure 1. General Duplex unit components - front view Page Cooling Cycle Page Page Page Figure 7. Sequence of operation overview. Figure 8. CDHE/F/G sequence of operation: auto to running Figure 9. CDHE, CDHF, and CDHG sequence of operation: running Page Figure 12. CDHF/G sequence of operation: lead 1/lag 2 Figure 13. CDHE/F/G sequence of operation: lead 2 lag 1 Figure 14. CDHF/G sequence of operation: equalize starts and hours Figure 15. CDHF/G sequence of operation: combined start Page Oil and Refrigerant Pump Surface Temperatures! Page Base Loading Control Algorithm: Page Ice Machine Control Figure 18. Sequence of operation: ice making: running to ice making Figure 19. Sequence of operation: ice making: stopped to ice to ice building complete Hot Water control Unit Control Panel (UCP) Control Panel Devices and Unit Mounted Devices Figure 20. Left control panel Unit Control Panel (UCP) Tracer CH530 Chiller Controller Figure 21. DynaView main processor Page Page A general description of the top level modes is show in the following table. Figure 22 Figure 23 Page Main Screen Data Fields Table Diagnostic Screen Page Page Report Menu Report name: System Evaporator Report name: Circuit Evaporator Report name: System Condenser Report name: Circuit Condenser Report name: System ASHRAE Chiller Log Report name: Circuit ASHRAE Chiller Log Historic Diagnostics Log Page Chiller Feature Settings System Mode Overrides Circuit Mode Overrides (0 to disable) Purge Display Settings { Page Page Page Page Control Panel Internally mounted devices Interprocessor Communication Inter Processor Communications IPC3 Page Page Control Panel Devices Head Relief Request Output Maximum Capacity Relay Compressor Running Relay Machine Shutdown Manual Reset (MMR) Chilled and Condenser Water Flow Interlock Circuits Refrigerant Monitor Input 1A17 Page CDRP Refrigerant Pressure Output Option 1A15: Figure 25. Condenser pressure based output Page GBAS (Generic Building Automation System) Figure 27. Voltage versus percent RLA External Chilled Water Setpoint (ECWS) External Current Limit Setpoint WPSR (WFC Water Pressure Sensing Option) Module Characteristics Page Recommended Length to Run external Output signals Unit mounted devices Page Page Electrical Sequence UCP and Wye-Delta Starter Control Circuits Page Page Figure 24. Test and start timing sequence Page Momentary Power Loss (MPL) Protection. and starter module remain powered) Figure 29. Sequence of operation: momentary power loss, (DynaView Current Overload Protection Figure 30. Overload trip time versus percent RLA Current Limit Protection Reverse Rotation Protection Differential to Start or Stop SoftLoading Evaporator Limit Leaving Water Temperature Cutout Low Refrigerant Temperature Cutout Page Condenser Limit Restart Inhibit Page Page Controls Chilled Water Reset (CWR) Return Water = Maximum Reset. Outdoor Air Temperature Where Constant Return Reset Ratio: Figure 32. Outdoor air temperature versus degrees of reset Page Page Page Unit Start-Up Procedures Unit Startup Seasonal Unit Start-Up Unit Startup Live Electrical Components! Toxic Hazards! Unit Shutdown Unit Shutdown Procedures Seasonal Unit Shutdown Oil Pump Heater Operation! Trouble Analysis Moisture Contamination! Hazardous Voltage w/Capacitors! Normal Chiller Operating Characteristics Weekly Maintenance Every 6 Months Every 3 Months Off-Season Maintenance Annual Maintenance Oil Maintenance Compressor Oil Change Oil Change Procedure Heater Damage! Oil Maintenance Replacing Oil Filter Other Maintenance Requirements Oil Supply System Problems! Hazardous Voltage w/ Capacitors! Figure 37. Rotary valve in drain position Refrigerant Charge Contains Refrigerant! Recovery and Recycle Connections Leak Testing Figure 38. Typical chemical cleaning setup Cleaning the Condenser Proper Water Treatment! Unit Corrosion Damage! Cleaning the Evaporator Control Settings and Adjustments Purge System Unit Preparation Contains Refrigerant! Live Electrical Components!