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Heat Pipe Technology BKP 250 Installation Operation & Maintenance

Heat pipe dehumidifier
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MANUAL
INSTALLATION, OPERATION & MAINTENANCE
Commercial High Efficiency
Heat Pipe Dehumidifier
Model BKP
Model BKP
Model BKP
Model BKP
Model BKP
Model BKP
Heat Pipe Technology, Inc.
6904 Parke East Blvd. Tampa FL 33610
Tel: (813) 470-4250
http://www.heatpipe.com
E-mail: info@heatpipe.com
250
TM
250-AC
TM
350
TM
350-AC
TM
450
TM
450-AC
TM
8/12/05

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  • Page 1 INSTALLATION, OPERATION & MAINTENANCE Commercial High Efficiency Heat Pipe Dehumidifier Model BKP Model BKP 250-AC Model BKP Model BKP 350-AC Model BKP Model BKP 450-AC Heat Pipe Technology, Inc. 6904 Parke East Blvd. Tampa FL 33610 Tel: (813) 470-4250 http://www.heatpipe.com E-mail: info@heatpipe.com...

  • Page 2: General Description

    Model BKP 250, 250-AC, Model BKP 350, 350-AC, Model BKP 450, 450-AC INSTALLATION, OPERATION & MAINTENANCE 1. GENERAL DESCRIPTION The BKP s are commercial high efficiency dehumidifiers. They are radically different from other dehumidifiers because of the proprietary heat pipe used to exchange heat between the warm intake air and the cold air discharge from the evaporator.
  • Page 3 3.2 Condensate Drain The BKP s are supplied with a condensate gravity drain outlet. For the gravity drain, the pipe must have a downward slope for the entire distance to the outside. If installed above the ceiling, the pipe must be supported every 3 or 4 feet to prevent sagging.
  • Page 4 3.41 Long Line Sets (50 ft or Longer) For line sets where there are no vertical sections greater than 10 ft. and for lengths up to 150 ft. increase the vapor line one size larger but leave the liquid line size as is. Also add 4 extra ounces of refrigerant oil (3GS or Equivalent) to the system for every 50 ft.

  • Page 5: Electrical Wiring

    4. ELECTRICAL WIRING CAUTION: Units with three phase compressors can be damaged by running backward. Verify correct compressor rotation by observing refrigerant pressure gauges at startup. Little or no gauge movement indicates reverse rotation. Reverse any two leads in the power junction box. Note: Fan blower motor is single phase and not affected by lead connections.

  • Page 6: Operation

    hose from the remote condenser tap after charging and before running the unit. Weigh in the refrigerant charge using the suction and discharge ports. The proper charge of refrigerant 22 for the unit and the remote condenser can be found on the nameplate. It is important to have the proper charge of refrigerant.

  • Page 7: Maintenance

    During the wintertime when the space must be heated, the BKP s thermostat should be set 2 to 3 degrees above the main heating thermostat. This will use the BKP s normal dehumidifying operation mode to provide additional heating to supplement the building's heating system while the BKP™ runs. It will continue in this mode until its dehumidistat is satisfied.
  • Page 8 9. Sequence of Operation for Standard Unit The BKP is controlled, on or off, by a dehumidistat which senses the relative humidity of the space. The BKP units have a remote mounted dehumidistat and are designed to be used with a duct system having a total external static of 0.5 in H O or less.

  • Page 9: Optional Equipment

    The outdoor condenser is powered from a separate power supply. No control voltage wiring is connected. A head pressure switch inside the outdoor condenser controls the fan. The fan comes on when the pressure in the outdoor coil reaches 240 psig and shuts off when it drops below 190 psig. The refrigerant flows from the compressor to the reversing valve inlet.

  • Page 10: Specifications

    SPECIFICATIONS 250, 350, 450 Models Capacity (lbs/day) at 80°F & 60% RH (AHAM) Capacity (lbs/day) at 80°F & 50% RH (ASHRAE) 1000 Air Flow Rate (cfm) Operating Range All models can operate from 60°F/100% RH to 95°F/55% RH Dimensions (WxHxD) (in.) 45 x 22 x 22 45 x 22 x 27 45 x 22 x 34...
  • Page 11 and BKP-AC SERIES TROUBLESHOOTING CHECK LIST Return Supply Company: ________________________________ Phone: (____) ________ Fax: (____) __________ Job Name: ________________________________ Model # : __________ Serial # : ______________ Test performed by: ______________ Date: ______ Remote Condenser Test Dehumidification Air Conditioning Return Air Flow Return Air Temperature °F DB °F WB...
  • Page 12   BKP 250, 350, 450 and AC Wiring Schematic...
  • Page 13 BKP 250, 350, 450 Wiring Diagram...
  • Page 14 BKP 250AC, 350AC, 450AC Wiring Diagram...
  • Page 15    BKP 250AC, 350AC, 450AC With Cooling Priority Wiring Schematic...
  • Page 16 BKP 250AC, 350AC, 450AC With Cooling Priority Wiring Diagram...
  • Page 17 BKP 250AC, 350AC, 450AC Remote Condenser Wiring Diagram...
  • Page 18 TROUBLESHOOTING Follow each applicable section in order from top to bottom. Note 1 - Acceptable control voltage range 22 volts to 30 volts. 1) The unit does not start. Possible Cause Solution No power to the unit. Check the voltage to unit at the top of contactor. Humidistat set above space humidity level.
  • Page 19 3) Unit locks out before starting. Turn power off to unit for this section. Put gauges on high and low refrigeration ports. Possible Cause Solution If both gauges are below 40 psig, the unit has a Repair and recharge the unit. refrigerant leak Low pressure gauge below 40 psig and high Replace thermal expansion valve and filter dryer.
  • Page 20 4b) Unit shuts down on high pressure. Possible Cause Solution Check for proper airflow. Replace filter, clean coil, duct and blower. Let ice melt and check for proper operation of the hot If air flow is low, check that the coil is not icing up. gas bypass For BKP-AC , the outdoor fan does not come on...
  • Page 21 6) BKP runs but does not dehumidify. Follow the procedure in (4) "unit runs a short time then locks out" to observe sight glass while running the . Using thermometers and hygrometers, take the dry bulb temperature and relative humidity readings at the air inlet to the BKP Possible Cause Solution...
  • Page 22 Twelve-Month Limited Warranty Subject to the following conditions, Heat Pipe Technology, Inc. (HPT), warrants this product to be free from defects in material and workmanship for a period of TWELVE MONTHS from the date of installation, not to exceed 90 days from date of shipment. This warranty is in lieu of all other warrants not expressly set forth herein, whether expressed or implied by operation of law or otherwise.

  • Page 23: Warranty Registration Form

    Warranty Registration To insure your warranty protection, please fill in the Warranty Registration form and mail or fax it to: Heat Pipe Technology, Inc. 4340 NE 49 Avenue, Gainesville, FL 32609 Fax: (352) 367-1688 WARRANTY REGISTRATION FORM Customer Name: Customer Address:...

This manual is also suitable for:

Bkp 450Bkp 450-acBkp 250-acBkp-350Bkp 350-ac

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