GeoSource 2000 Installation and Operating Instructions Vertical and Horizontal Forced Air GV/GH 18 Thru 120 Series
GeoSource 2000 Vertical Unit Air Filter Blower Air Coil Contactor Transformer Expansion Valve Controller Scroll Compressor Reversing Valve Desuperheater (Optional) Air Pad GeoSource 2000 Horizontal Unit Controller Air Coil Reversing Valve Blower Transformer Scroll Compressor Contactor Air Pad
TABLE OF CONTENTS Section Title Page I. Introduction to ECONAR Heat Pumps . . . . . . . . . . . . . . . . . . . . . 2 II. Unit Location/Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 III. Duct System/Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 IV. Earth Loop Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 A. Closed Loop Applications B.
I. INTRODUCTION TO ECONAR HEAT PUMPS ECONAR Energy Systems, Corp. has been producing geothermal heat pumps in Minnesota for over fifteen years. The cold winter climate has driven the design of ECONAR Energy System's heating and cooling equipment to what is known as a "Cold Climate" geothermal heat pump . This cold climate technology focuses on maximizing the energy savings available in heating dominated regions without sacrificing comfort.
F Note: The blower will not operate properly if ductwork is not attached. The ductwork supplies static pressure to give the blower motor a load to work against. Blower motors may overheat if run for an extended period of time without ductwork attached.
IV. EARTH LOOP WATER PIPING area, soil type, and individual capacity requirements. Contact your local installer or ECONAR’s Customer Support for loop sizing requirements in your area. Since water is the source of energy in the wintertime and the energy sink in the summertime, good water supply is possibly the most important requirement of a geothermal heat pump system installation. There are two common types of water supplies, closed loop systems and open loop systems.
Table 3 – Loop Side Flow Rates Model Closed Loop Flow dP (gpm) (psi) G(V,H)18 4 0.9 G(V,H)23 6 3.0 G(V,H)29 7 3.9 G(V,H)36 8 5.5 G(V,H)42 10 7.8 G(V,H)52 11 5.2 G(V,H)59 13 6.0 G(V,H)67 14 7.0 G(V,H)98 22 3.8 G(V,H)120 26 4.5 Open Loop Flow dP (gpm) (psi) 2 0.9 3 0.9 4 1.5 4 1.3 5 1.7 6 1.6 9 3.1 10 3.8 12 2.5 16 3.0 Pressure/Temperature (P/T) ports should be installed in the entering and leaving water lines of the heat pump on a closed loop system (see Figure 1).
Figure 2 – Open Loop Water Plumbing The heat pump should never be operated with flow rates less than specified. Low flow rates or no flow may result in freezing water in the water to refrigerant heat exchanger. This will cause the unit to shut down on lowpressure lockout. If the unit locks out, verify that the unit has the required flow and reset the unit by shutting off power to the unit for one minute.
1. 2. 3. Turn off the heat pump and its water supply. Open a plumbing connection on the water supply side, if possible, to break the system vacuum and allow easier drainage of the system and water coil. Drain the water out of the system and water coil via the boiler drains on the entering and leaving water lines, and the drain on the heat exchanger. N WARNING!! N FAILURE TO COMPLETELY DRAIN THE WATER COIL HEAT EXCHANGER COULD POSSIBLY RESULT IN A FREEZE RUPTURE! 4. 5. 6. 7. 8. 4.
drop of the condensate trap. Vented condensate traps are necessary to break the negative pressure in the air chamber and allow the condensate to flow. Construct condensate traps to the following diagram. 2.
the PumpPAK with a call for heating or cooling. The use of impedance protected pumps eliminates the need for additional fusing on the PumpPAK. VIII. 24 VOLT CONTROL CIRCUIT The wiring diagrams in Figures 5 and 6 shows the low voltage controls of the heat pump. This section will break down the three basic components of the low voltage circuit; transformer, thermostat, and controller. A.
The anticipator has the effect of reducing system capacity by restricting run time. The thermostat should never be set back to less than 60o F. Air temperatures less than 60o F to the heat pump in residential applications can cause difficult starting conditions and lock the unit out. Commercial applications can be designed to use lower entering air temperatures, but 60o F is a safe low operating point in residential applications. C.
clogged or kinked, and the unit is not draining water, the sensor will shut the heat pump off for an anti-short-cycle period of approximately 3 minutes and 35 seconds. After this time, the heat pump will start again if the condensate has drained. If the water is still present, the unit will go through anti-short-cycles until the condensate has drained. This protection switch keeps the condensate from overflowing the drain pan and possibly leaking onto the floor or ceiling. - - IX.
A. Filter The GeoSource 2000 heat pump is equipped with a disposable air filter. This filter should normally be replaced once a month during normal usage. During extreme usage or if system performance has decreased, the filter should be replaced more often. A dirty filter will reduce the airflow to the system. This decrease in airflow will reduce the efficiency and comfort level of the system.
XII. TROUBLESHOOTING GUIDE FOR UNIT OPERATION PROBLEM POSSIBLE CAUSE Blown Fuse/Tripped Circuit Breaker Blown Fuse on Controller Broken or Loose Wires Voltage Supply Low Low Voltage Circuit Entire unit does not run Thermostat Interruptible Power Thermostat Wiring Blown Fuse High or Low Pressure Controls Defective Capacitor Voltage Supply Low Blower motor runs but compressor does not, or compressor short cycles.
PROBLEM Unit Short Cycles (Continued) POSSIBLE CAUSE Wiring and Controls Compressor Overload Water Unit Undersized Loss of Conditioned Air by Leaks Thermostat Insufficient cooling or heating.
PROBLEM Noisy Operation (Continued) POSSIBLE CAUSE Rattles and Vibrations Water and Airborne Noises Dirty Air Filter Airflow Evaporator (air coil) ices over Water drips from unit Evaporator Blower Motor Tripping Off on Overload Unit Operating at Too Low a Room Temperature Unit Not Level or Pitched Correctly Condensate Drain Line Kinked or Plugged CHECKS AND CORRECTIONS Check for loose screws, panels, or internal components. Tighten and secure. Copper piping could be hitting the metal surfaces.
XIV. ADDITIONAL FIGURES AND TABLES Figure 4 – Horizontal Unit Hanging Bracket INDICATOR LIGHTS PWR ASC LP HP FP OFD COMMENTS Blown fuse or power removed. X X ASC indicator on for 4' 35" on power initialization. X Power applied - unit running or waiting for a call to run.
Figure 5 – Wiring Diagram, Forced Air Models [G(V,H)xxx-x-TxOx] 17
Figure 6 – Wiring Diagram, Forced Air Models [GH(98,120)x-x-TxTx] 18
XV. DESUPERHEATER (OPTIONAL) which reduces pump life and causes noise problems in the pump. A spring-type check valve with a pressure rating of 1/2 psi or less is recommended. A GeoSource 2000 unit equipped with a desuperheater can provide supplemental heating of a home's domestic hot water. This is done by stripping heat from the superheated gas leaving the compressor and transferring it to a hot water tank.
Figure 7 – Preferred Desuperheater Installation Figure 8 – Alternate Desuperheater Installation 20
GeoSourceÒÒ 2000, DualTEK, Vara, Vara 2 PlusTM and Invision 3 Heat Pumps USA and Canada Residential and Limited Commercial Warranty** Residential Applications Only: All Parts – 2 Years Years 1 through 2, ECONAR Energy Systems Corp. will provide a free replacement part upon prepaid return of all d efective parts, F.O.B. Appleton, MN for any part which fails to function properly due to defective material, or workmanship. * During this period, ECONAR will provide a free relacement part F.O.B.
ColdClimate Geothermal Heat Pumps 19230 Evans Street (Hwy 169) Elk River, MN 55330 USA 1-800-4-ECONAR www.econar.com NRTL/C 90-0113 Rev. 7-03 ECONAR Energy Systems Corp.
