Chromalox PQ404-6 - Manuals

Page 2 - Figure 1

2 High PressureControl PressureGauge Manual ResetPressure Conrol ElectricControlBox Blow DownDrain Valve(L) ReturnInlet (J) HeatingElements Step Sequencer(Optional) Wall 30” C B A Wall D I H E Blow DownDrain Valve (L) Check ValveWater Inlet (K) WaterLevelControl G 60” SafetyValve (G) SteamOutlet (F)...

Page 3 - WIRING; - Purchaser should use a safety switch

3 INSTALLATION (cont’d.) SPECIAL INSTRUCTIONS FOR CUSTOMERS SUPPLYINGTHEIR OWN CONDENSATE 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 controlci...

Page 5 - Figure 11 – Automatic Reset Low Water Cutoff Junction Box; Figure 12 – Pressure Control

NOTES1. Motor, Solenoid Valve and Dotted Control Wiring are included ifMotor and Pump package is supplied. Solenoid Valve only is sup-plied with 99117 Water 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...

Page 6 - Avoid opening globe valve all at; MANUAL BLOWDOWN INSTRUCTIONS; OPERATION; Timer; Pilot Lights and Switches; Figure 15 – Display View of Automatic Blowdown Control Cabinet

6 RECOMMENDED START-UP PROCEDURES1. Close globe valve on outlet side of boiler. (Customer Supplied) 2. Turn 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. Avoid opening globe valv...

Page 7 - Figure 16 – Typical Wiring for Automatic Blowdown System; Now turn the wheel on the large timer until the “off” tab passes the; NORMAL OPERATION –; Set the tabs on the large timer for the ON and OFF times desired

7 OPERATION (cont’d.) Figure 16 – Typical Wiring for Automatic Blowdown System Now turn the wheel on the large timer until the “off” tab passes the “time now” arrow. The “boiler normal” light should go out and thevalve should begin to open. Once the “valve open” light goes on, thevalve should remain...

Page 8 - Control will not work with de-ionized or; OPTIONAL EQUIPMENT FOR CHROMALOX STEAM BOILERS; Adjusting Screw

8 AUXILIARY LOW WATER 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 ...

Page 9 - Ohmmeter; Figure 19 – Five Step Sequencer

9 5. Connect the ohmmeter between controller terminals W and R andraise the set point of the controller above the actual pressure beingmeasured. 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 wh...

Page 10 - The Sequence Reverser accomplishes its tasks and shows the rela-; Solid State Progressive Sequencer (See Figure 22); The solid state sequencer operates on 120 V AC/60 Hz and each; MAINTENANCE; Figure 21 – Five Step Sequence Reverser; Hazard of electric shock. Disconnect all

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 thecycle. 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 ofthe time and the later ...

Page 11 - ” Steam Equalizing Pipe

11 MAINTENANCE RENEWAL PARTS IDENTIFICATION INSTRUCTIONS FOR ELEMENT REPLACEMENTCAUTION: Before installing your new elements, be sure the McDonnell-Miller low-water cut-off is operating perfectly and thefloat chamber and lower equalizer column are completely clear ofsludge or other foreign matter. (...