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Published byDuane Walder
Modified over 2 years ago
BY PHIL RODIN Air and Water Chiller Basic Class
Things to check when chiller is not running or is in alarm
Alarm showing water flow, pumps both chilled and condenser water types of flow switches
Alarm showing water flow, pumps both chilled and condenser water types of paddle switches
Alarm showing water flow, pumps both chilled and condenser water types of electronic flow switches Electronic flow switches have probes
Alarm Conditions High Pressure 1. Low water flow 2. Cooling tower 3. Strainers (locations?) 4. Valves (electric or manual types) 5. The entering and leaving water temp. 6. Approach temp
Alarm conditions Chilled water flow 1. Pumps 2. Strainers 3. Valves (manual and electric) 4. Flow switches 5. Water temp in and out 6. Approach temp
Alarm conditions Chilled water flow (cont.) PRV
What is the oil temperature? 1. Feel the tank or read with inferred. 2. Check control panel 3. Check for power 4. Think out of the box, How can we heat this?
What is the oil temperature? (cont.)
Pressure & Temp. Gauges (electronic)
Pressure & Temp. Gauges (fluid type)
Chiller Surging ASK YOURSELF????? 1. Is it a high or low end surge? 2. Are your amps going up or down? 3. The sound? a. Is it an elephant b. Is it a grumble
Chiller Surging (High & Low Surging) High Surge on Low Pressure Machines 1. Water temp. in and out. 2. Approach 3. Cooling Tower 4. Purge 5. Refrigerant levels
Chiller Surging (High & Low Surging)
Chiller Surging (capacity control)
Chiller Capacity Control
Low End Surge 1. Water temp. In and out 2. Approach Temp. 3. Water pressure 4. Refrigerant levels
Low End Surge
Transducers & Sensors Types
Panel Codes 1. Carrier code York code 9675 aka YORK 3. Trane code (different combinations)
Hows the Chiller Running? Is the chiller running in local? Is the chiller running in EMS? Are the pumps running? Are the valves open? Hand –off Auto (Think before going to hand)
Cavitation of Pumps 1. Strainers 2. Water pressures 3. Couplings 4. Valves 5. Primary or Secondary Loop
Questions (There is no such thing as a dumb question) ?
Chiller basics With Phil Rodin. Things to check when chiller is not running or is in alarm.
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