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Summary of Contents for pick heaters 6X7
- Page 1 PICK VARIABLE FLOW SERVICE MANUAL INSTANTANEOUS STEAM INJECTION VARIABLE FLOW HEATER SERVICE MANUAL...
- Page 2 FOR WATER OR STEAM LEAKS IN THE SYSTEM. HIGH VELOCITY LIQUIDS OR STEAM COULD PENETRATE THE SKIN AND CAUSE SERIOUS INJURY. Any questions about the installation or operation of your Pick Heaters should be directed to your local Pick Heater representative, or Pick Heaters at 800-233-9030. (Outside the US and Canada,...
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Page 3: Table Of Contents
Determination of repair or replacement will be at the discretion of Pick Heaters, Inc. Pick Heaters shall not be liable for losses or delays resulting from damaged or defective parts. This warranty does not cover damage caused by improper installation or adjustment, or by willful neglect of specified operation and maintenance procedures. -
Page 4: Safety Information
PICK VARIABLE FLOW SERVICE MANUAL This symbol is placed in this manual to call attention to safety precautions for the installation and operation of this product. Observe ALL instructions accompanied by this symbol. This symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Be familiar with the varying degrees of hazard represented by the signal words CAUTION and WARNING. -
Page 5: Troubleshooting Tables
PICK VARIABLE FLOW SERVICE MANUAL TROUBLESHOOTING Pick heaters rarely require troubleshooting or repair, thanks to the simplicity of design and operation. Many apparent difficulties with heater operation are actually the result of a problem or adverse condition in the steam supply system, or product supply and distribution lines. - Page 6 Damaged injection tube Disassemble and 12-13 inspect injection tube. Repair injection tube or return to Pick Heaters for complete re- conditioning. Steam boiler or pressure Increase steam supply reducing valve (PRV) set pressure at boiler or lower than specified PRV.
- Page 7 PICK VARIABLE FLOW SERVICE MANUAL Malfunction in the pump Inspect and repair look check valve check valve as necessary Capacity of heater is Consult Pick Heaters exceeded for heater upgrade information Faulty temperature Repair or replace controller controller Steam inlet pressure...
- Page 8 PICK VARIABLE FLOW SERVICE MANUAL PROBLEM: Noisy Heater Operation. OBSERVATION PROBABLE CAUSE ACTION PAGE Air trapped in a high point Bleed air from the of the cold water supply or water system the hot water header, creating an unstable Install automatic air condition vent valve(s) Distribution branches not...
- Page 9 20% travel when operating. open (operating below Valve must be open minimum turndown) more than 20% open. Consult Pick Heaters about a smaller or dual steam valve arrangement Steam control valve moves The temperature too fast (only with non-...
- Page 10 PICK VARIABLE FLOW SERVICE MANUAL PROBLEM: Low Water Flow Rate OBSERVATION PROBABLE CAUSE ACTION PAGE Supply failure from the Examine water supply water source system, correct all problems Broken or plugged pipe Inspect water supply fittings, including check lines, replace plugged valves, gate valves, strainer, or faulty components etc.
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Page 11: Injection Tube Service
Because these factors vary from one application to another, no fixed INTERNAL CLEANING WIHTOUT rules or schedules are possible. (Pick heaters DISASSEMBLY may require cleaning once per year, once each month- or even more frequently). - Page 12 A good SEE FIGURE 1 The body of a Pick heater indication of when the unit is clean (except Model 6X7) consists of two is the cessation of foaming. housings that are flanged together. Before 10. Turn off the pump motor. Drain the...
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Page 13: Heater Disassembly
DISASSEMBLY AND INSPECTION OF pump and heater. THE MODEL 6X7 HEATER DISASSEMBLY OF MODEL 6X10 The body of the 6X7 heater consists of a THROUGH 6X500 single housing. See Figure 4 1. Remove the heater housing bolts. 2. Disconnect the union in the... -
Page 14: Injection Tube Cleaning
PICK VARIABLE FLOW SERVICE MANUAL 1. Disconnect the steam line union on hand to minimize downtime during located between the steam valve and maintenance. the heater. 2. Loosen the double-end bushing one- INEJCTION TUBE CLEANING (ALL quarter turn, and remove the steam MODELS) line nipple to facilitate removal of the double-end brushing. - Page 15 Remove any high points cause by scoring. DISASSEMBLY (MODEL 6X7) SEE FIGURE 4. To examine the piston and spring, remove the shoulder bolt that holds the spring stopper in the injection tube.
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Page 16: Illustrations
PICK VARIABLE FLOW SERVICE MANUAL... - Page 17 PICK VARIABLE FLOW SERVICE MANUAL...
- Page 18 PICK VARIABLE FLOW SERVICE MANUAL...
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Page 19: Reassembly/Installation Of Injection Tube
Install the outlet spring stopper bolt holes (except model housing. 6X7). Reinstall the bolts that hold the spring stopper in place, but DO NOT re-use IMPORTANT: Carefully install the outlet the old nuts. -
Page 20: Pump Service
PICK VARIABLE FLOW SERVICE MANUAL Note: Sealant must be FDA approved CIRCULATING PUMP SERVICE when heating potable water. Thread the injection tube into the double- CAUTION: Be sure the pump end bushing (the bushing should be clamped motor is turned off and the in a vise at the flats to prevent damage to electrical supply is locked out threads.) Use an 8-inch pipe wrench to... -
Page 21: Steam Control Valve
PICK VARIABLE FLOW SERVICE MANUAL steam valve to move too fast to a new If water is not relieved from the heater in position, resulting in hammer vibration this manner, the loop water will continue to and poor temperature control. If cool. -
Page 22: Packing Gland Adjustment
7. Most steam valves have an steam valve should be installed. Contact adjustment nut at the top of the yoke Pick Heaters or your Pick representative for opening. Turning this into the more information. actuator body increases the opening pressure. -
Page 23: Temperature Controller Adjustment And Service
PICK VARIABLE FLOW SERVICE MANUAL temperature control problems; however, Note: The supply is marked with an “S” and several other components also affect the control port is marked “R” on the bottom temperature control. All should be checked of the controller. before replacing the temperature controller. -
Page 24: Other Troubleshooting Issues
Consult exists. The steam line strainer basket may be Pick Heaters or the local representative if plugged, restricting steam flow to the heater. internal servicing is required. HEATER/SYSTEM ISOLATION... -
Page 25: Replacement Parts
IMPORTANT: An incorrectly installed heater will not work properly. Check heater installation carefully; correct piping connections as appropriate. TECHNICAL ASSISTANCE Pick Heaters, Inc. can provide assistance and replacement parts as needed in the event of...
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