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Manual Chromalox PQ404-6

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  • Chromalox PQ404-6 - page 1

    (Supersedes PQ404-5) PQ404-6 CHS 161-048642-001 OCTOBER, 1983 4 and Installation, Operation RENEWAL PARTS IDENTIFICATION Horizontal Electric Steam Boiler Model Number CHS 0 – 150 PSI © 2010 Chromalox, Inc. Power CC Size of Output Nominal 90˚C Amps Standard Lbs. per Model B.H.P . Fuse Delta Size Wire per Elements Control Hr . at Number Rating kW ...

  • Chromalox PQ404-6 - page 2

    2 High Pressure Control Pressure Gauge Manual Reset Pressure Conrol Electric Control Box Blow Down Drain Valve (L) Return Inlet (J) Heating Elements Step Sequencer (Optional) Wall 30” C B A Wall D I H E Blow Down Drain Valve (L) Check Valve Water Inlet (K) Water Level Control G 60” Safety Valve (G) Steam Outlet (F) INST ALLA TION (cont’d.) Fi ...

  • Chromalox PQ404-6 - page 3

    3 INST ALLA TION (cont’d.) SPECIAL INSTRUCTIONS FOR CUSTOMERS SUPPL YING THEIR OWN CONDENSA TE OR PUMP SYSTEMS. 1. Check the voltage of the motor before making the wiring connec- tion. Some Chromalox boilers are supplied with dual voltage sys- tems. The motor should always match the voltage of the control circuit. 2. The motor circuit should be w ...

  • Chromalox PQ404-6 - page 4

    4 WIRING (cont’d.) Figure 8 – T ypical Wiring Diagram Power Circuit T erminal Block T o Other Heater Groups To Other Heater Groups T ypical 3 Phase Heater Group To Power Curcuit Relay Step Sequencer Figure 9 – Power Circuit Detail Low Water Probe 120 Volt Control Voltage Hi Limit Control Electronic Resistance Sensing Amplifier for Auxiliary L ...

  • Chromalox PQ404-6 - page 5

    NOTES 1. Motor , Solenoid V alve and Dotted Control W iring are included if Motor and Pump package is supplied. Solenoid V alve only is sup- plied with 991 17 W ater feed. 2. 1/3 HP Motor is controlled directly without use of Motor Starter . After proper wiring and piping of boiler system is complete, testing of controls can start. Before testing c ...

  • Chromalox PQ404-6 - page 6

    6 RECOMMENDED ST ART -UP PROCEDURES 1. Close globe valve on outlet side of boiler . (Customer Supplied) 2. T urn on boiler and allow pressure to build up to operating pressure. 3. Only open globe valve by quarter turns at first, introducing small- er amounts of steam into process. A void opening globe valve all at once. This will eliminate the poss ...

  • Chromalox PQ404-6 - page 7

    7 OPERA TION (cont’d.) Figure 16 – T ypical Wiring for Automatic Blowdown System Now turn the wheel on the large timer until the “of f” tab passes the “time now” arrow . The “boiler normal” light should go out and the valve should begin to open. Once the “valve open” light goes on, the valve should remain open for a few seconds ...

  • Chromalox PQ404-6 - page 8

    8 AUXILIAR Y LOW W A TER CUT -OFF (See page 4 for Wiring Diagram) Operation Operation of this control is accomplished by sensing a minute AC current flowing between submerged contact probe in the boiler shell. When this minute AC current is conducted through an external cir- cuit resistance up to 100,000 ohms or less, a signal of sufficient mag- ni ...

  • Chromalox PQ404-6 - page 9

    9 5. Connect the ohmmeter between controller terminals W and R and raise the set point of the controller above the actual pressure being measured. The ohmmeter should read the full value of the poten- tiometer measured in step 4 (135 ohms for an L91B). 6. Slowly lower the set point of the controller while observing the ohmmeter reading. The resista ...

  • Chromalox PQ404-6 - page 10

    10 The Sequence Reverser accomplishes its tasks and shows the rela- tive use of each of ten beat stages during the first four days of the cycle. This is how the work load would be distributed on a boiler with- out Sequence Reverser . It can be seen the early stages are ON most of the time and the later stages are OFF most of the time, since they ar ...

  • Chromalox PQ404-6 - page 11

    11 MAINTENANCE RENEW AL P ARTS IDENTIFICA TION INSTRUCTIONS FOR ELEMENT REPLACEMENT CAUTION: Before installing your new elements, be sure the McDonnell-Miller low-water cut-off is operating perfectly and the float chamber and lower equalizer column are completely clear of sludge or other foreign matter . (See Figure 23) Failure to do this may cause ...

  • Chromalox PQ404-6 - page 12

    2150 N. RULON WHITE BLVD., OGDEN, UT 84404 Phone: 1-800-368-2493 www.chromalox.com RENEW AL P ARTS IDENTIFICA TION (cont’d.) Low Water Cutoff and Water Feed Controls Description Part Number Complete Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300-118538-013 Complete Assembly (Manual Reset) . . . . . . . . . ...

Manufacturer Chromalox Category Boiler

Documents that we receive from a manufacturer of a Chromalox PQ404-6 can be divided into several groups. They are, among others:
- Chromalox technical drawings
- PQ404-6 manuals
- Chromalox product data sheets
- information booklets
- or energy labels Chromalox PQ404-6
All of them are important, but the most important information from the point of view of use of the device are in the user manual Chromalox PQ404-6.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Chromalox PQ404-6, service manual, brief instructions and user manuals Chromalox PQ404-6. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Chromalox PQ404-6.

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A complete manual for the device Chromalox PQ404-6, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Chromalox PQ404-6 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Chromalox PQ404-6.

A complete Chromalox manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Chromalox PQ404-6 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Chromalox PQ404-6, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Chromalox PQ404-6, that we can find in the current document
3. Tips how to use the basic functions of the device Chromalox PQ404-6 - which should help us in our first steps of using Chromalox PQ404-6
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Chromalox PQ404-6
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Chromalox PQ404-6 in a specific country, if it was not possible to solve the problem on our own.

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