by phil rodin air and water chiller basic class. things to check when chiller is not running or is...
TRANSCRIPT
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 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 Pressure1. Low water flow2. Cooling tower3. Strainers (locations?)4. Valves (electric or manual types)5. The entering and leaving water temp.6. Approach temp
Alarm conditions
Alarm conditions
Alarm conditions
Alarm conditionsChilled water flow
1. Pumps2. Strainers3. Valves (manual and electric)4. Flow switches5. Water temp in and out6. Approach temp
Alarm conditionsChilled water flow (cont.)
PRV
What is the oil temperature?
1. Feel the tank or read with inferred.2. Check control panel3. Check for power4. Think out of the box, How can we heat
this?
What is the oil temperature?(cont.)
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 Machines1. Water temp. in and out.2. Approach 3. Cooling Tower4. Purge5. Refrigerant levels
Chiller Surging(High & Low Surging)
Chiller Surging(High & Low Surging)
Chiller Surging(High & Low Surging)
Chiller Surging(High & Low Surging)
Chiller Surging(capacity control)
Chiller Capacity Control
Low End Surge
1. Water temp. In and out2. Approach Temp.3. Water pressure4. Refrigerant levels
Low End Surge
Low End Surge
Transducers & Sensors Types
Transducers & Sensors Types
Panel Codes
1. Carrier code 11112. York code 9675 aka YORK3. Trane code ++--++ (different
combinations)
How’s 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. Strainers2. Water pressures3. Couplings4. Valves5. Primary or Secondary Loop
Questions(There is no such thing as a dumb question)
?