Service / Training Manual Revision Date: October 17, 2005 Release Date: November 26, 2001 Publication Number: TP00952 Revision: F www.cornelius.
TABLE OF CONTENTS Product Preview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Preview Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Key Things to Know / Do . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 Model and Serial Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Xtreme Ice Machine . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fan control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjusting Bridge Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total Ice Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ice Production Check . . . . . . . .
Possible Causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Failed Water System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Possible Causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Failed Water Temperature Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Possible Causes . . . . . . . . . . . . . . . . . . . . . . . . . . .
Xtreme Ice Training Manual PRODUCT PREVIEW PREVIEW QUESTIONS Check your current knowledge by taking a few minutes to answer the following questions: 1. Does the ice machine need to be level? _____ Yes _____ No? 2. What is the recommended clearance for a air cooled machine? ________________________________________________________________________________ ____________________________ 3.
Xtreme Ice Training Manual MODEL AND SERIAL LOCATION XTREME ICE MACHINE Condenser Discharge Air Deflector (as required)* Bin Adapter (as required)* Model/Serial Number Location FIGURE 1 *Bin adapters and condenser discharge air deflector may be equipped depending on your location or the size of the storage bin. Record the model number and the serial number of your ice equipment. These numbers are required when requesting information from your local dealer/distributor/service company.
Xtreme Ice Training Manual XAC XWC XAC XWC XRC Model 322/330 322/330 522/530 522/530 522/530 XAC 630 XWC 630 XRC 630 XAC 830 UNIT Volts Phase Hertz No. Wires 115 1 60 2+Ground 230 1 60 2+Ground MIN. CIRCUIT Amps MAX. FUSE SIZE. Amps 20 15 20 20 15 20 REFRIGERANT Type Weight (oz) Weight (g) R404a 19 539 R404a 15 426 R404a 25 709 R404a 23 652 R404a 135 3,827 R404 a 40 1,134 R404 a 35 992 R404 a 170 4,820 R404 a 42 1,191 COMPRESSOR LRA RLA 58.8 9.2 68 11.9 40.6 6.9 60 8.
Xtreme Ice Training Manual XAC XWC XRC Model 1444 1444 1444 XAC XWC XRC 1844 1844 1844 XAC 322 E50 XAC 330 E50 XAC 522 E50 XAC 530 E50 UNIT Volts Phase Hertz No. Wires 230 1 60 2+Ground 220 1 50 2+Ground MIN. CIRCUIT Amps MAX.
Xtreme Ice Training Manual GENERAL FREIGHT DAMAGE CLAIMS PROCEDURE The deliverer of your equipment (freight company, distributor or dealer) is responsible for loss or damage of your shipment. All claims must be filed with the deliverer of your equipment. Please follow the steps below to determine if your shipment is satisfactory or if a claim must be filed: 1. Check the number of products delivered against the number of products listed on the delivery receipt.
Xtreme Ice Training Manual INSTALLATION INSTRUCTIONS Installation and start up of the equipment should be performed by the distributor or the dealer’s professional staff. LOCATION OF EQUIPMENT For maximum performance the location should be away from heat sources such as ovens, direct sunlight, hot air discharge, etc. To reduce cost of maintenance and loss of efficiency, avoid placing air-cooled equipment in areas where grease, flour and other airborne contaminants are present. Allow a minimum of 6I (15.
Xtreme Ice Training Manual DISPENSER INSTALLATION 1. Order the proper cuber/dispenser adaptor kit. This package include gasket material, a hold-down bracket, and bin stat kit (contact service provider for more information). 2. RTV applications (See Figure 3). If the ice bin is full, new ice will not be able to drop. Instead it blocks the evaporator curtain open and no additional ice is made. This new ice may start to melt and the resulting liquid can leak out of the joint between the ice maker and bin.
Xtreme Ice Training Manual PLUMBING CONNECTIONS 1. All plumbing lines and connections must conform to local and national plumbing codes. 2. Line shut-off valves must be located in supply water lines for cuber and condenser if product is water-cooled. Water supply to water-cooled condenser must include a stand-pipe to prevent “water hammer”. 3. Should your local water supply quality require the installation of a water filter system, consult your local distributor or dealer for proper size required. 4.
Xtreme Ice Training Manual Preventative Maintenance Sequence The installation is not complete until you are sure the owner-operator understands the cuber operation and his or her responsibility of preventative maintenance. Does the owner-operator know: 1. Location of electrical disconnect switch and water shut-off valves? 2. How to start and/or shut down the product, clean and sanitize it? 3. 4.
Xtreme Ice Training Manual CLEANING PROCEDURES Approved ice machine cleaners by brand names: S Calgon Nickel Safe (green color only) NOTE: Failure to use approved products will void the warranty. CAUTION: Ice machine cleaners are acidic-based chemicals. Before beginning any cleaning of the cuber, the ice in the storage bin or dispenser must be removed. WARNING: When using any chemical, rubber gloves and eye protection should be worn. Cleaning Procedure if there is ice on the evaporator plate. 1.
Xtreme Ice Training Manual PREP – CLEANING PROCEDURE Use ice machine cleaner on a coarse-surface cloth material (such as terry cloth) and wipe down the inside wall of the evaporator area, the water pan, the water curtain and the plastic water deflector. If the water distributor tube has heavy scale build-up, remove and soak it in full-strength nickel safe ice machine cleaner (or exchange the tube and clean the scaled tube at a later date) (See Figure 6).
Xtreme Ice Training Manual SANITIZING THE WATER SYSTEM AND THE EVAPORATOR NOTE: To be performed only after cleaning the ice machine: 1. Turn the power switch to “OFF”. 2. Add 1/4 ounce (7.08 g) sodium hypochlorite solution (common liquid laundry bleach) to the water pan. You may also use a commercial sanitizer such as Calgon Ice Machine Sanitizer following the directions on the product label. 3. Turn the Cuber power switch “ON” allowing the compressor to start.
Xtreme Ice Training Manual OPERATIONS CAUTION: WHEN REPLACING THIS BOARD, BE SURE THE DIP SWITCH SETTINGS ARE IN THE PROPER POSITION FOR YOUR UNIT. UNIT SELECTION 1. The unit selection dip switches tell the microprocessor the correct water level difference for harvest and the number of proximity switch circuits to monitor. 2. The unit selection dip switches are a series of 3 switches that can be placed in either the ON or OFF position. 3.
Xtreme Ice Training Manual START UP SEQUENCE (PRIMARY) 1. Check all connections. 2. Water pan must be empty at the start of the initial fill cycle. 3. Turn on the main power switch, the red LED will flash 6 times then remains on for 4 seconds. NOTE: If there is a very large slab of ice on the evaporator you will need to push the manual harvest button to remove it. SECONDARY START UP 1. Compressor starts after ERROR LED extinguishes, and the green COMP LED turns on. 2.
Xtreme Ice Training Manual PRECHILL CYCLE (1400’S AND 1800’S) 1. After the water fill cycle is complete, the water pump turns on. 2. When the water temperature reaches 40_F, the pump turns off. 3. After one minute, the pump comes back on. 4. After another ten seconds, the fill valve opens. 5. Once the water level reaches the maximum level, the fill valve closes. FIGURE 8 FREEZE CYCLE 1. Ten seconds after the fill valve turns off, the microprocessor records the water level. 2.
Xtreme Ice Training Manual ADJUSTING BRIDGE THICKNESS For optimum ice production and maximum cube separation, the ice connecting the individual cubes should be a minimum of 1/8I (.32cm.) thick (See Figure 9). When adjusting the ice thickness, the adjust Led is on the control board, it will be on for four seconds when it is at nominal voltage 2.4 to 2.5 VDC 2% (See Figure 8 for location of the J9 connector). BRIDGE 1/8I (0.32 cm.
Xtreme Ice Training Manual WH COMPRESSOR GR COMPRESSOR RUN COMPRESSOR START CAPACITOR CAPACITOR CONTACTOR BK RD RD BR R 25 mfd 370V 60 HZ C S YL BK 72–88 mfd 250V 60 HZ EXTERNAL YL COMPRESSOR OVERLOAD WH UNIT OR 2 BR 5 SWITCH POTENTIAL BL 1 1 START RELAY WH 3 OFF ON MANUAL RESET HIGH PRESSURE CONTROL(W/C ONLY) WATER FILL WH BR CO 450 PSIG BL WH WATER DUMP BK VALVE BR WH (White Lead) Condenser Sensor See note YL CONDENSER (Black Lead) Water Temp Sensor FAN MO
Xtreme Ice Training Manual LED INDICATORS The LEDs are board circuit indicators. If the LED in the functional board circuit is complete, check component. Example: Contactor does not energize and LED is “ON”, board circuit is OK. Check contactor, coil, leads, & connections. Yellow: S Evaporator switch(s) (proximity) S Delay (located on the electrical box front).
Xtreme Ice Training Manual Curtain Open Yellow LED off Right evaporator curtain open. Yellow LED off Left evaporator curtain open. Condenser Fan Green LED (on or off) Condenser fan cycles on and off depending upon condenser temperature. Compressor Green LED (on) Compressor contactor activeĆcompressor running. Right Curtain Yellow LED (on) Right evaporator curtain closed. Left Curtain Yellow LED (on) Left evaporator curtain closed (only if unit has two evaporators).
Xtreme Ice Training Manual HARVEST BUTTON The Harvest Button is located on the control board (See Figure 5 in the Cleaning Procedures chapter. Manual Harvest 1. At any time after secondary start up, the machine can be put into the harvest cycle by depressing the harvest button. 2. Pressing the harvest button will tell the microprocessor to skip directly to the harvest cycle. 3. Once the harvest cycle completes, the machine continues with normal operations. Unit Check 1.
Xtreme Ice Training Manual SAFETY (OLD SOFTWARE) NOTE: Prior to S/N 63K0344BC050 for self–contained units and S/N 63M0351BC056 for remote units. SAFETY FEATURES 1. 2. 3. 4. 5. 6. 7. 8. 9.
Xtreme Ice Training Manual WATER FILL TIME OUT 1. During the fill cycle if the water level does not reach the maximum level in 4 minutes the machine goes into a delay sequence. 2. After each delay, the machine restarts at the secondary start up. 3. The sequence continues as follows: S Fill try, 30 min delay, fill try, 30 min delay, fill try, 2 hr delay. S Fill try, 30 min delay, fill try, 30 min delay, fill try, 2 hr delay. S Fill try, 30 min delay, fill try, 30 min delay, fill try, 2 hr delay.
Xtreme Ice Training Manual HARVEST TIME OUT 1. If the microprocessor does not recognize all proximity switch circuits opening 4 minutes after the hot gas valve opens during the harvest cycle, the machine enters a delay sequence. 2. After each delay, the machine restarts at the secondary start up. 3. The delay sequence continues as follows: S Harvest try, 30 min delay, harvest try, 30 min delay, harvest try, 2 hr delay. S Harvest try, 30 min delay, harvest try, 30 min delay, harvest try, 2 hr delay.
Xtreme Ice Training Manual 7. 8. 9. 10. 11. During delay period, the DELAY LED flashes 1 times at 4 second intervals. Once the machine reaches shut down, all outputs turn off. At the shut down time, the ERROR LED flashes 1 times at 4 second intervals. The machine will not run until the power is cycled. The delay sequence resets after each successful harvest. Possible Causes 1. 2. 3. 4.
Xtreme Ice Training Manual SAFETY (NEW SOFTWARE) NOTE: After S/N 63K0344BC050 for self–contained units and S/N 63M0351BC056 for remote units. SAFETY FEATURES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Xtreme Ice Training Manual FAILED FREEZE TIME OUT SHUTDOWN 1. If the freeze time reaches 50 minutes before a harvest cycle is initiated, the machine goes into the harvest cycle. 2. After a successful harvest cycle, the machine goes into another water fill and freeze cycle. 3. If the freeze time reaches 50 minutes again, the machine again goes into the harvest cycle. 4. After a successful harvest cycle, the machine goes into another water fill and freeze cycle. 5.
Xtreme Ice Training Manual HIGH CONDENSER TEMPERATURE WARNING AND SHUTDOWN 1. If the condenser temperature rises above 160_F, the machine shuts down. 2. While shut down, the WARNING LED flashes 1 time at 4–second intervals. 3. If the condenser temperature falls below 110_F, the machine goes into a secondary startup cycle. 4. If the condenser temperature rises above 160_F again, the machine shuts down again. 5. While shut down, the WARNING LED flashes 1 time at 4–second intervals. 6.
Xtreme Ice Training Manual FAILED WATER TEMPERATURE SHUTDOWN 1. If the water temperature does not reach 40_F within 5.5 minutes, the machine shuts down. 2. While shut down, the ERROR LED flashes 4 times at 4 second intervals. 3. The machine will not run until the power is cycled OFF and then ON. Possible Causes 1. 2. 3. 4. 5. Water pump failure. Low refrigerant charge. Leak in refrigerant lines. Compressor failure. Hot gas valve leaking. OPEN WATER TEMPERATURE THERMISTOR 1.
Xtreme Ice Training Manual COMPONENT FUNCTION (CIRCUIT BOARD, ETC.) SENSORS Condenser sensor (WHITE) is a thermistor rated at 2618 ohms to 3032 ohms at 32_F (0_C). Condenser sensor signals the circuit board for fan cycling and also serves as the high temperature safety shut down. The red “DELAY LED” will flash on and off every second, during high temperature safety delay. The yellow “ERROR LED” will flash on and off every second, during high temperature safety error. Product is functionally shut down.
Xtreme Ice Training Manual NOTE: The sensor controls the condenser fan cycling from 88/100 degree Fahrenheit. Thus any defects in the condenser circuit will effect the fan cycling rate. CONDENSER FAN CYCLING CONTROL The condenser fan on air-cooled cubers is cycled by the circuit board. The condenser sensor signals the circuit board when the condenser temperature reaches 100°F (38°C) the fan starts and continues to run until the temperature is reduced to 88°F (31°C).
Xtreme Ice Training Manual WATER REGULATING VALVE The water regulating valve is used on water-cooled cubers only. The valve is installed in the condenser outlet water line. It’s function is to control the proper operating head pressure by regulating the amount of water flowing through the condenser. The valve is adjustable and factory set to maintain condenser discharge water temperature @ 108/112_F (42-44_C).
Xtreme Ice Training Manual MOISTURE CONTAMINATION With the major changes in refrigerants in today’s marketplace and the use of hydroscopic oils the control of moisture and contaminates have become more critical to safeguard against than ever before in the history of mechanical refrigeration. Contaminates are also the most difficult of all problems to determine. A Meg-Ohm meter “Megger” can be a valuable tool to aid in the analysis of this problem.
Xtreme Ice Training Manual COMPRESSOR & STARTING COMPONENT CHECK-OUT PROCEDURE When a compressor fails to start or run properly, it is normally the external electrical supply or the compressor start components that are defective – the overload protector, start and/or run capacitor, relay, circuit board, safety controls, etc. 1. Check voltage at compressor terminals.
Xtreme Ice Training Manual Compressor 1. Using an ohm meter, check for continuity from compressor terminal C to R and C to S. If the compressor is hot, wait one (1) hour for compressor to cool and recheck. An open internal overload protector can cause a lack of continuity. If continuity cannot be measured through all windings, the compressor must be replaced. 2.
Xtreme Ice Training Manual SYSTEM EVACUATION & RECHARGING Should service work ever be required on a product where the sealed refrigeration is opened for any reason, the refrigerant must be recovered, drier/filter replaced, evacuated and recharged. The old method of “purging” is NOT ACCEPTABLE. Always evacuate the system through both the high and low side service valves. Be certain both valves are completely open when evacuating and the drier/filter has been replaced.
Xtreme Ice Training Manual IMPORTANT: Service personnel are held responsible for all aspects of the clean air act of July, 1992. REFRIGERANT DEFINITIONS (ASHRAE 3-1990) RECOVERY To remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.
Xtreme Ice Training Manual TROUBLESHOOTING IMPORTANT: Only qualified personnel should service internal components or electrical wiring. Trouble Probable Cause Remedy CUBER NOT OPERATING A. Power switch in “OFF” position. A. Place switch in “ON” position. CUBER NOT OPERATING, INDICATOR LIGHTS “OFF”, NO POWER TO CIRCUIT BOARD A. Test power switch and leads. A. If defective, replace. CUBER NOT OPERATING, INDICATOR LIGHTS “OFF”, POWER TO THE CIRCUIT BOARD A.
Xtreme Ice Training Manual Trouble COMPRESSOR RUNS BUT DOES NOT COOL, CIRCUIT BOARD INDICATOR LIGHTS “ON” CUBER DOESN’T GO INTO FREEZE CYCLE CUBER REMAINS IN THE FREEZE CYCLE LONG FREEZE CYCLE GENERAL TP00952 Probable Cause Remedy A. Low charge. A. Leak check – Recharge. B. Hot gas solenoid leaking. B. Replace. C. Defective expansion valve. C. Replace. D. Inefficient compressor. D. Replace. E. Internal by-pass open, compressor noisy. E. Permit pressures to equalize. A.
Xtreme Ice Training Manual Trouble LONG HARVEST CYCLES SOFT WHITE ICE OR WATER PUMP NOT PUMPING October 17, 2005 Probable Cause Remedy A. Ice weight set too light. A. Adjust bridge per adjustment instructions. B. Unit not level. B. Level the unit. C. Water curtain movement restricted. C. Remove restriction. D. Low head pressure: ambient too low. D. Minimum ambient temperature 50_F (10_C). E.
Xtreme Ice Training Manual Trouble LEAKING WATER PAN Probable Cause A. Damaged water pan. Remedy A. Replace water pan (see Kit Instructions, number below, for Water Pan Replacement). Model # 300 500/600/800/1000 1200 Pull tab toward you. Kit # 631500152 631500153 631500154 Turn pump clockwise and lift. FIGURE 15 NOTE: Remove pump tubing from the dump solenoid, after the pump has been lifted out of the reservoir, disconnect the distributor tubing at the tee fitting and lift pump out.
October 17, 2005 WATER DUMP VALVE 41 HIGH SIDE SERVICE VALVE HOT GAS SOLENOID VALVE S MODELS XAC322, XAC330, XAC522, XAC530, XAC630, XAC830 FAN MOTOR LOW SIDE SERVICE VALVE COMPRESSOR HEAT EXCHANGER FILTER/DRIER ÄÄ ÄÄ ÄÄ REFRIGERATION AND WATER SYSTEMS WATER PUMP THERMOSTATIC EXPANSION VALVE EVAPORATOR FAN BLADES AIR COOLED CONDENSER Xtreme Ice Training Manual FIGURE 16 TP00952
TP00952 WATER DUMP VALVE 42 Models XWC322, XWC330, XWC522, XWC530 , XWC630, XWC830 S HOT GAS SOLENOID VALVE HIGH SIDE SERVICE VALVE COMPRESSOR LOW SIDE SERVICE VALVE PRESSURE SWITCH FILTER/DRIER ÄÄ ÄÄ Refrigeration and Water Systems WATER PUMP HEAT EXCHANGER THERMOSTATIC EXPANSION VALVE EVAPORATOR WATER INLET WATER-COOLED CONDENSER WATER REGULATING VALVE Xtreme Ice Training Manual FIGURE 17 October 17, 2005
Xtreme Ice Training Manual XTREME ICE – KITS BIN STAT KIT, P/N 630000408 Installation Instructions These Bin Stat kits apply to all “X” Series Ice makers. Item No. 1 2 3 4 5 Part No. 630000837 07578 630460162 630900895 620045454 or 620045455 or 620045456 or 620045457 Loose–Shipped Parts Name Thermostat Asy Screw TC 08–32 Installation Instruction, Thermostat Hex Nut 8–32 SS Keps Bin Stat Support Qty. 1 2 1 2 1 1. Disconnect power. 2. Remove front cover of the unit and the electrical box cover plate.
Xtreme Ice Training Manual ELECTRICAL BOX ASY TO CIRCUIT BOARD SCREW TC 08–32 THERMOSTAT KIT ASY 631500074 COIL TO CHASSIS BASE FIGURE 18 TP00952 44 October 17, 2005
Xtreme Ice Training Manual (White Lead) Condenser Sensor See note 1 ERROR DELAY PRESSURE Transducer CLEAN Harvest RD Unit Selection Switch Bridge Thickness pot. Off 321 On Micro Processor (Manufacturing Date) 36430001 Off S3–1 S3–2 Adjust J9 Valve #8 #7 GR Dump On #6 GR Comp #4 WATER PUMP GR Pump #3 HOT GAS #2 NEUTRAL #1 POWER Bin Switches N S 4 LH Evap.
Xtreme Ice Training Manual A DETAIL SCALE 1:2 BIN STAT SUPPORT INSERT COIL AROUND 8–32 HEX NUT BIN STAT SUPPORT CAPILLARY TUBE A SEE DETAIL BIN STAT SUPPORT FIGURE 20 TP00952 46 October 17, 2005
Xtreme Ice Training Manual REMOTE CONDENSERS Installation Instructions 1/4-20 SCREW UNIT LEG BRACE LEG FIGURE 21 1. Follow the standard installation instructions supplied with cuber. Do not hook cuber into the power source until the remote condenser and line set installation is complete. 2. Assembly of remote condenser (See the following Figures): A. Assemble legs to base panel. Install leg supports on legs. B.
Xtreme Ice Training Manual 3. Remote condenser electrical hook-up: A. Connect remote condenser to a power source (208/230VAC, 60 HZ) separate from the cuber. An external disconnect switch must be used. B. Make sure the electrical connections follow all local and national codes. C. DO NOT turn condenser on until cuber install and refrigerant line connections are complete! D. Never wire condenser into cuber section. The condenser is an independent electrical connection. E.
Xtreme Ice Training Manual REMOTE CONDENSER LOCATION 1. Physical Line-Set Length: 55 Ft. Maximum [16.764 meters] The ice machine compressor must have the proper oil return. Line-set rises, drop, or horizontal runs greater than the maximum distance allowed will exceed the compressor start up and pumping design limits, and will result in poor oil return to the compressor. Line-Set Rise: 35 Ft. Maximum [10.66 meters] Line-Set Drop: 15 Ft. Maximum [4.57 meters] 2. Calculated Line-Set Distance: 100 Ft. [30.
Xtreme Ice Training Manual b. Insert measured drop (D) into formula and multiply by 6.6 to get a calculated drop (See Figure 26). example: A condenser located 8 ft. [2.438 meters] below the ice machine has a 52.8 ft. [16.093 meters] calculated total (8 ft. x 6.6 = 52.8 ft.). COMBINATION OF DROP(S) WITH HORIZONTAL H D AIR FLOW FIGURE 26 c. d. Insert measured horizontal distance into formula. No calculation is necessary. (6 ft.) [1.828 meters].
Xtreme Ice Training Manual 4. Connection of Line-Set A. Remove the plastic caps from the line-set, the condenser, and the ice machine. B. Apply refrigeration oil to the threads on the quick connect couplers before connecting them to the condenser. C. Carefully thread the female fitting onto the condenser or ice machine by hand. D. Using the proper size wrench, tighten the couplings until they bottom out. Turn an additional 1/4 turn to ensure proper brass-to-brass seating. E. Check all fittings for leaks.
Xtreme Ice Training Manual The headmaster controls the operation when the condensing temperature drops below 70°F. The refrigerant charge is HP - 62 [R - 404A] and the headmaster dome charge setting is 200 PSI of nitrogen pressure making it stable under the low temperature operating range down to - 20°F. The normal flow pattern through the headmaster is from the condenser port to the receiver port.
Xtreme Ice Training Manual 6. Always leak check entire system after recharge. CAUTION: Before programming the electronic scales to “dump” the charge, de-energize the liquid line solenoid, close the shut-off valve on vacuum pump and low side of the manifold set.
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Xtreme Ice Training Manual IMI CORNELIUS INC.
