P.O. Box 245 Syracuse, NY 13211 www.roth-usa.com info@roth-usa.com 888-266-7684 RCT Models Combination Water-to-Air Multi-Positional Heat Pumps Engineering Data and Installation Manual Rev.: 16 February 2012D P/N: *20D093-01NN* 20D093-01NN Table of Contents: Section 1: Model Nomenclature Model Nomenclature ..............................................................2 Section 2: AHRI Performance Data Performance Data...................................................................
io ns ha pt :C O x 14 & 15 oa 13 :C ss io io pt O er w lo :B M M 12 1 ns O ir A e rg ha isc :D 1 is pt ns io pt O ir A C 11 10 :R et ur n tW at ge 9: 048 1 C SS Other Options: SS = Standard Brand: R = Roth Coax Options: C = Copper (Standard) N = CuproNickel Type: C = Vertical Combination Stage: T = Two-Stage - R-410a Blower Options: 1 = ECM Motor Unit Capacity (Nominal MBTUH): 024, 036, 048, 060, 072 Discharge Air Options: M = Multi-Position Vertical Revision: A =
Section 2: AHRI Performance Data Ground Loop Heat Pump Model 024C 036C 048C 060A 072A Capacity Heating Cooling Btu/hr COP Btu/hr EER Full Load 19,400 4.5 25,900 20.1 Part Load 16,100 4.9 20,300 27.9 Full Load 28,500 4.5 38,400 18.5 Part Load 22,200 4.9 29,200 27.4 Full Load 39,200 4.1 50,800 18.2 Part Load 31,600 4.8 39,700 27.3 Full Load 48,400 3.8 62,800 16.9 Part Load 38,700 4.2 48,600 23.5 Full Load 57,900 3.6 67,800 15.0 Part Load 48,100 4.
Section 3a: Unit Dimensional Data B C 27.63 .97 Power Supply 1/2” 5.50 .89 1.13 CAP High Voltage Supply 1” E BSP Air Coil D D A2 A1 Condensate 3/4” FPT Condensate 3/4” FPT CSP ASP ASP Left View Front & Back View Control Panel Plug Plate 30.33 28.01 Low Votage 1/2” 16.00 CAP Plenum Flanges S AP Access Panels AIR COIL SIDE Filter Rack 16.00 32.20 30.33 28.01 BS P 5.31 Control Box 8.12 13.00 14.00 Top Discharge SA P CS P LEGEND: 10.
Section 3b: Unit Physical Data Dual Capacity Vertical Model Number 024 036 048 060 072 Fan Wheel (in.) 10 x 11 10 x 11 10 x 11 10 x 11 10 x 11 .5 .5 .75 1 1 62 59 74 106 122 5.55 5.55 5.55 6.25 6.25 31.8 x 25.1 x 1.0 31.8 x 25.1 x 1.0 31.8 x 25.1 x 1.0 36 x 28.5 x 2.8 36 x 28.5 x 2.8 4 4 Fan Motor ECM (HP) Refrigerant Charge (oz.) Air Coil Face Area (Sq.Ft.) Dimensions (in.
Section 4: Unit Electrical Data Two-Stage Packaged Units 60Hz Power Model 024 036 048 060 072 Compressor Volts Phase LRA RLA ECM Fan Motor FLA 1 208/230 1 58.3 11.7 3.9 0.5 4.0 20.1 23.0 35 12 49 0 208/230 1 58.3 11.7 3.9 N/A N/A 15.6 18.5 30 14 41 2 208/230 3 55.4 6.5 3.9 N/A N/A 10.4 12.0 15 14 62 1 208/230 1 83.0 15.3 3.9 0.5 4.0 23.7 27.5 40 10 70 0 208/230 1 83.0 15.3 3.9 N/A N/A 19.2 23.0 35 12 52 2 208/230 3 73.0 11.
Section 5: Specification Glossary & Calculations Glossary of Terms CFM = Airflow, Cubic Feet/Minute HR = Total Heat Of Rejection, Btu/hr COP = Coefficient of Performance = BTU Output / BTU Input KW = Total Power Unit Input, Kilowatts DH = Desuperheater Capacity, Btu/hr LAT = Leaving Air Temperature, Fahrenheit EAT = Entering Air Temperature, Fahrenheit (Dry Bulb/Wet Bulb) LC = Latent Cooling Capacity, Btu/hr EER = Energy Efficiency Ratio = BTU output/Watts input SC = Sensible Cooling Capacity, Btu/
Section 6a: Model 024 Performance Data: 2.0 Ton, Part Load, 700 CFM Cooling / 700 CFM Heating EWT Flow °F GPM 25 30 40 50 60 70 80 90 100 110 6.0 WPD PSI FT 1.6 3.7 4.3 0.8 1.9 5.0 1.0 2.4 6.0 1.6 3.7 4.3 0.8 1.9 5.0 1.1 2.5 6.0 1.6 3.8 4.3 0.8 1.9 5.0 1.1 2.5 6.0 1.6 3.8 4.3 0.8 1.8 5.0 1.0 2.4 6.0 1.6 3.6 4.3 0.7 1.7 5.0 1.0 2.2 6.0 1.4 3.3 4.3 0.7 1.6 5.0 0.9 2.0 6.0 1.3 3.1 4.3 0.7 1.5 5.0 0.9 2.0 6.0 1.3 3.0 4.3 0.7 1.6 5.
Section 6b: Model 024 Performance Data: 2.0 Ton, Full Load, 950 CFM Cooling / 950 CFM Heating EWT Flow °F GPM 25 30 40 50 60 70 80 90 100 110 7.0 WPD PSI FT 2.6 6.1 5.0 1.2 2.8 6.0 1.8 4.2 7.0 2.6 5.9 5.0 1.1 2.6 6.0 1.7 3.9 7.0 2.4 5.5 5.0 1.1 2.5 6.0 1.6 3.8 7.0 2.3 5.3 5.0 1.1 2.5 6.0 1.6 3.8 7.0 2.3 5.3 5.0 1.1 2.5 6.0 1.7 3.8 7.0 2.3 5.4 5.0 1.1 2.5 6.0 1.6 3.7 7.0 2.3 5.2 5.0 1.0 2.2 6.0 1.5 3.4 7.0 2.1 4.7 5.0 0.8 2.0 6.
Section 6c: Model 024 Performance Data: 2.0 Ton, Full Load Hydronic Heating EST Flow °F GPM 25 30 40 50 60 70 80 90 Source WPD PSI FT 2.0 4.6 3.0 0.7 1.6 4.5 2.0 4.6 6.0 2.0 4.6 3.0 0.6 1.5 4.5 1.8 4.2 6.0 1.8 4.2 3.0 0.6 1.4 4.5 1.7 3.9 6.0 1.7 3.9 3.0 0.6 1.3 4.5 1.6 3.7 6.0 1.6 3.7 3.0 0.5 1.3 4.5 1.6 3.6 6.0 1.6 3.6 3.0 0.5 1.2 4.5 1.4 3.3 6.0 1.4 3.3 3.0 0.5 1.1 4.5 1.3 3.1 6.0 1.3 3.1 6.
Section 6d: Model 036 Performance Data: 3.0 Ton, Part Load, 1050 CFM Cooling / 1050 CFM Heating EWT Flow °F GPM 25 30 40 50 60 70 80 90 100 110 7.0 WPD PSI FT 2.5 5.8 5.0 1.4 3.3 6.0 1.9 4.4 7.0 2.4 5.5 5.0 1.3 3.0 6.0 1.7 3.9 7.0 2.2 5.0 5.0 1.2 2.7 6.0 1.6 3.6 7.0 2.0 4.6 5.0 1.1 2.5 6.0 1.5 3.4 7.0 1.9 4.3 5.0 1.0 2.4 6.0 1.4 3.2 7.0 1.8 4.1 5.0 1.0 2.3 6.0 1.3 3.0 7.0 1.7 3.9 5.0 0.9 2.1 6.0 1.2 2.8 7.0 1.6 3.6 5.0 0.8 2.0 6.
Section 6e: Model 036 Performance Data: 3.0 Ton, Full Load, 1300 CFM Cooling / 1300 CFM Heating EWT Flow °F GPM 25 30 40 50 60 70 80 90 100 110 9.0 WPD PSI FT 3.4 7.8 7.0 2.4 5.5 8.0 2.8 6.4 9.0 3.3 7.5 7.0 2.2 5.0 8.0 2.6 6.0 9.0 3.1 7.1 7.0 2.0 4.6 8.0 2.4 5.5 9.0 2.8 6.5 7.0 1.9 4.3 8.0 2.2 5.0 9.0 2.6 6.0 7.0 1.8 4.1 8.0 2.0 4.6 9.0 2.4 5.5 7.0 1.7 3.9 8.0 1.9 4.3 9.0 2.2 5.1 7.0 1.6 3.6 8.0 1.8 4.1 9.0 2.1 4.9 7.0 1.4 3.3 8.
Section 6f: Model 036 Performance Data: 3.0 Ton, Full Load Hydronic Heating EST °F Flow GPM 25 30 40 50 60 70 80 90 Source WPD PSI FT 9.0 3.5 8.2 4.5 1.1 2.6 7.0 2.2 5.0 9.0 3.4 7.9 4.5 1.1 2.5 7.0 2.0 4.7 9.0 3.2 7.4 4.5 1.0 2.3 7.0 1.9 4.4 9.0 3.0 7.0 4.5 0.9 2.2 7.0 1.8 4.2 9.0 2.9 6.6 4.5 0.9 2.1 7.0 1.7 4.0 9.0 2.7 6.3 4.5 0.9 2.0 7.0 1.6 3.8 9.0 2.6 6.0 4.5 0.8 1.9 7.0 1.6 3.6 9.0 2.5 5.
Section 6g: Model 048 Performance Data: 4.0 Ton, Part Load, 1400 CFM Cooling / 1400 CFM Heating EWT Flow °F GPM 25 30 40 50 60 70 80 90 100 110 8.0 WPD PSI FT 3.4 7.9 6.0 1.9 4.4 7.0 2.5 5.9 8.0 3.2 7.4 6.0 1.7 3.9 7.0 2.2 5.2 8.0 2.8 6.6 6.0 1.5 3.5 7.0 2.0 4.6 8.0 2.5 5.8 6.0 1.3 3.1 7.0 1.8 4.1 8.0 2.3 5.2 6.0 1.3 2.9 7.0 1.7 3.8 8.0 2.1 4.9 6.0 1.2 2.8 7.0 1.6 3.7 8.0 2.0 4.7 6.0 1.2 2.8 7.0 1.6 3.7 8.0 2.0 4.6 6.0 1.1 2.6 7.
Section 6h: Model 048 Performance Data: 4.0 Ton, Full Load, 1700 CFM Cooling / 1650 CFM Heating EWT Flow °F GPM 25 WPD PSI FT 12.0 6.6 15.3 8.0 3.1 7.1 10.0 4.8 11.0 12.0 6.3 14.6 8.0 2.8 6.5 10.0 4.4 10.1 12.0 5.8 13.3 8.0 2.5 5.8 10.0 3.9 9.1 12.0 5.2 12.0 8.0 2.3 5.2 10.0 3.5 8.1 12.0 4.6 10.7 8.0 2.0 4.7 10.0 3.2 7.3 12.0 4.2 9.7 8.0 1.9 4.5 10.0 3.0 6.9 12.0 4.0 9.2 8.0 1.9 4.4 10.0 3.0 6.9 12.0 3.9 9.1 8.0 1.9 4.4 100 10.0 2.9 6.
Section 6i: Model 048 Performance Data: 4.0 Ton, Full Load Hydronic Heating EST °F Flow GPM Source WPD PSI FT 25 12.0 7.9 18.2 6.0 2.1 5.0 9.0 4.2 9.7 12.0 7.6 17.6 6.0 2.0 4.7 9.0 3.9 9.0 12.0 7.1 16.5 6.0 1.9 4.4 9.0 3.7 8.5 12.0 6.7 15.5 6.0 1.8 4.2 9.0 3.5 8.1 12.0 6.4 14.7 6.0 1.7 3.9 9.0 3.3 7.7 12.0 6.0 14.0 6.0 1.6 3.8 9.0 3.2 7.3 12.0 5.8 13.3 6.0 1.5 3.6 9.0 3.0 6.9 12.0 5.5 12.
Section 6j: Model 060 Performance Data: 5.0 Ton, Part Load, 1550 CFM Cooling / 1500 CFM Heating EWT Flow °F GPM WPD PSI FT 12.0 5.6 12.9 6.0 1.3 3.0 10.0 3.7 8.5 12.0 5.4 12.5 6.0 1.2 2.8 10.0 3.4 7.9 12.0 4.9 11.3 6.0 1.1 2.5 10.0 3.2 7.4 12.0 4.6 10.6 6.0 1.1 2.5 10.0 3.0 6.9 12.0 4.3 9.9 6.0 1.0 2.3 10.0 2.8 6.5 12.0 4.1 9.5 6.0 1.0 2.3 10.0 2.7 6.2 12.0 3.9 9.0 6.0 0.9 2.1 10.0 2.6 6.0 12.0 3.8 8.8 6.0 0.9 2.1 100 10.0 2.5 5.8 12.
Section 6k: Model 060 Performance Data: 5.0 Ton, Full Load, 1850 CFM Cooling / 1750 CFM Heating EWT Flow °F GPM WPD PSI FT 15.0 8.8 20.3 7.5 2.1 4.9 11.5 4.9 11.3 15.0 8.4 19.4 7.5 1.9 4.4 11.5 4.5 10.4 15.0 7.7 17.8 7.5 1.8 4.2 11.5 4.2 9.7 15.0 7.2 16.6 7.5 1.7 3.9 11.5 3.9 9.0 15.0 6.7 15.5 7.5 1.6 3.7 11.5 3.7 8.5 15.0 6.4 14.8 7.5 1.5 3.5 11.5 3.6 8.3 15.0 6.1 14.1 7.5 1.5 3.5 11.5 3.4 7.9 15.0 5.9 13.6 7.5 1.4 3.2 100 11.5 3.4 7.
Section 6l: Model 060 Performance Data: 5.0 Ton, Full Load Hydronic Heating EST °F Flow GPM Source WPD PSI FT 25 15.0 7.7 17.8 7.5 1.9 4.5 11.0 4.7 10.8 15.0 7.3 17.0 7.5 1.8 4.2 11.0 4.3 10.0 15.0 6.8 15.7 7.5 1.7 3.9 11.0 4.1 9.4 15.0 6.4 14.8 7.5 1.6 3.7 11.0 3.9 9.0 15.0 6.1 14.1 7.5 1.5 3.5 11.0 3.7 8.5 15.0 5.8 13.4 7.5 1.4 3.3 11.0 3.4 7.9 15.0 5.4 12.5 7.5 1.3 3.0 11.0 3.1 7.1 15.0 4.8 11.
Section 6m: Model 072 Performance Data: 6.0 Ton, Part Load, 1750 CFM Cooling / 1800 CFM Heating EWT Flow °F GPM WPD PSI FT 14.0 5.2 12.0 8.0 1.6 3.7 10.0 2.6 6.0 14.0 5.0 11.6 8.0 1.6 3.7 10.0 2.5 5.8 14.0 4.8 11.1 8.0 1.5 3.5 10.0 2.4 5.5 14.0 4.7 10.9 8.0 1.5 3.5 10.0 2.3 5.3 14.0 4.5 10.4 8.0 1.4 3.2 10.0 2.3 5.3 14.0 4.4 10.2 8.0 1.4 3.2 10.0 2.2 5.1 14.0 4.3 9.9 8.0 1.4 3.2 10.0 2.1 4.9 14.0 4.2 9.7 8.0 1.3 3.0 100 10.0 2.0 4.
Section 6n: Model 072 Performance Data: 6.0 Ton, Full Load, 2100 CFM Cooling / 2150 CFM Heating EWT Flow °F GPM WPD PSI FT 16.0 6.8 15.7 9.0 2.1 4.9 14.0 5.0 11.6 16.0 6.6 15.2 9.0 2.0 4.6 14.0 4.8 11.1 16.0 6.3 14.6 9.0 1.9 4.4 14.0 4.7 10.9 16.0 6.1 14.1 9.0 1.9 4.4 14.0 4.5 10.4 16.0 5.9 13.6 9.0 1.8 4.2 14.0 4.4 10.2 16.0 5.8 13.4 9.0 1.8 4.2 14.0 4.3 9.9 16.0 5.6 12.9 9.0 1.7 3.9 14.0 4.2 9.7 16.0 5.4 12.5 9.0 1.6 3.7 100 14.0 4.
Section 6o: Model 072 Performance Data: 6.0 Ton, Full Load Hydronic Heating EST °F Flow GPM Source WPD PSI FT 25 16.0 5.6 12.9 9.0 1.6 3.6 14.0 4.6 10.7 16.0 5.6 13.1 9.0 1.6 3.6 14.0 4.6 10.6 16.0 5.6 13.0 9.0 1.5 3.5 14.0 4.4 10.2 16.0 5.4 12.5 9.0 1.4 3.3 14.0 4.2 9.6 16.0 5.1 11.8 9.0 1.3 3.1 14.0 3.9 9.1 16.0 4.8 11.1 9.0 1.3 3.0 14.0 3.8 8.8 16.0 4.6 10.7 9.0 1.3 3.0 14.0 3.8 8.8 16.0 4.7 10.
Section 6p: Performance Data Correction Factors Heating Correction Factors EAT °F HC HE kW 50 1.0465 1.1188 0.8024 55 1.0351 1.0918 0.8436 60 1.0253 1.0645 0.8928 65 1.0108 1.0300 0.9454 70 1.0000 1.0000 1.0000 75 0.9895 0.9701 1.0553 80 0.9742 0.9489 1.0518 Cooling Correction Factors Sensible Cooling Correction Factors EAT (WB) °F TC HR kW EAT (WB) °F 70 75 55 0.8215 0.8293 0.8635 55 1.201 1.289 60 0.8955 0.9001 0.9205 60 0.943 1.067 1.192 63 0.
Section 7: Installation Introduction INTRODUCTION: This geothermal heat pump provides heating and cooling as well as optional domestic water heating capability. Engineering and quality control is built into every geothermal unit. Good performance depends on proper application and correct installation. equivalent protective covering. Cap or recap unit connections and all piping until unit is installed.
Section 7: Installation Introduction 4. 5. Verify that all refrigerant tubing is free of dents and kinks. Refrigerant tubing should not be touching other unit components. Before unit start-up, read all manuals and become familiar with unit components and operation. Thoroughly check the unit before operating. CAUTION ALL GEOTHERMAL EQUIPMENT IS DESIGNED FOR INDOOR INSTALLATION ONLY.
Section 8: Installation Considerations Consumer Instructions: Dealer should instruct the consumer in proper operation, maintenance, filter replacements, thermostat and indicator lights. Also provide the consumer with the manufacturer’s Owner's Manual for the equipment being installed. Thermostat: Thermostats should be installed approximately 54 inches off the floor on an inside wall in the return air pattern and where they are not in direct sunlight at anytime.
Section 9: Unit Placement UNIT PLACEMENT: When installing a geothermal heating and cooling unit, there are several items the installer should consider before placing the equipment. 1. 2. 3. WARNING DOWNFLOW UNITS REQUIRE THAT THE FLOOR OPENING (BETWEEN THE UNIT AND THE SUPPLY DUCT PLENUM) BE SLEEVED THROUGH THE FLOOR WITH METAL DUCT. THIS IS ESPECIALLY IMPORTANT IF THE UNIT IS SITTING ON A PAD. Service Access.
Section 9a: Unit Conversion Figure 1: Unit Conversion UNIT CONVERSION: Units are shipped in the left hand return air, upflow configuration. The control box is shipped inside the unit. The control box plugs into the electrical connection plate on the top of the unit and mounts with two screws to the top of the unit. To convert the unit to right hand return air: 1. Remove the front panels and rear panels. 2. Rotate the unit to the correct position. 3.
Section 9b: Ductwork Installation DUCT WORK: All new ductwork shall be designed as outlined in Sheet Metal and Air Conditioning Contractors National Association (SMACNA) or Air Conditioning Contractors of America (ACCA) or American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) handbooks. All supply/return plenums should be isolated from the unit by a flexible connector (canvas) or equivalent to prevent transfer of vibration noise to the ductwork.
Section 9b: Ductwork Installation Figure 3: Standard Ductwork Connection Setup 5HGXFHU 6XSSO\ $LU *ULOOH 6XSSO\ $LU 5HWXUQ $LU *ULOOH )OH[ &RQQHFWRU )OH[ &RQQHFWRU 7DNHRII UXQV VKRXOG QHYHU EH LQVWDOOHG RQ D UHGXFHU 7DNHRIIV VKRXOG EH LQVWDOOHG EHIRUH D UHGXFHU DQG DW OHDVW WR SDVW DQ\ UHGXFHU 5HWXUQ $LU +HDW 3XPS $FFHVVLEOH )LOWHU 5DFN 1HYHU LQVWDOO D WDNHRII RQ RU QHDU D UHGXFHU RU RQ DQ HQG FDS RU QHDU DQ HQG FDS ([FHSWLRQV PD\ DSSO\ NOTE: Maintain duct size of supply flange
Section 10: Unit Piping Installation Open Loop Piping Placement of the components for an open loop system are important when considering water quality and long term maintenance. The water solenoid valve should always be placed on the outlet of the heat pump, which will keep the heat exchanger under pressure when the unit is not operating. If the heat exchanger is under pressure, minerals will stay in suspension. Water solenoid valves are also designed to close against the pressure, not with the pressure.
Section 10: Unit Piping Installation Water Quality The quality of the water used in geothermal systems is very important. In closed loop systems the dilution water (water mixed with antifreeze) must be of high quality to ensure adequate corrosion protection. Water of poor quality contains ions that make the fluid “hard” and corrosive. Calcium and magnesium hardness ions build up as scale on the walls of the system and reduce heat transfer.
Section 10: Unit Piping Installation Interior Piping All interior piping must be sized for proper flow rates and pressure loss. Insulation should be used on all inside piping when minimum loop temperatures are expected to be less than 50°F. Use the table below for insulation sizes with different pipe sizes. All pipe insulation should be a closed cell and have a minimum wall thickness of 3/8”. All piping insulation should be glued and sealed to prevent condensation and dripping.
Section 10: Unit Piping Installation Typical Non-Pressurized Flow Center Installation Standing column flow centers are designed to operate with no static pressure on the earth loop. The design is such that the column of water in the flow center is enough pressure to prime the pumps for proper system operation and pump reliability. The flow center does have a cap/seal, so it is still a closed system, where the fluid will not evaporate.
Section 10: Unit Piping Installation NOTICE THIS UNIT FEATURES A BRAZED-PLATE HEAT EXCHANGER FOR HYDRONIC HEATING. TO PREVENT POTENTIAL EQUIPMENT DAMAGE, A WATER STRAINER IS PROVIDED AND MUST BE INSTALLED IN THE WATER INLET CIRCUIT TO PROTECT THE HEAT EXCHANGER FROM PARTIAL OR COMPLETE BLOCKAGE. IF ANOTHER STRAINER IS USED, IT SHOULD FEATURE A 16-20 MESH MINIMUM, 20-40 MESH IS A BETTER CHOICE. Condensation Drain Connection Connect the EZ-Trap to the condensate drain on the equipment drain connection.
Section 11: Antifreeze Antifreeze Overview In areas where minimum entering loop temperatures drop below 40°F, or where piping will be routed through areas subject to freezing, antifreeze is required. Alcohols and glycols are commonly used as antifreeze. However, local and state/provincial codes supersede any instructions in this document. The system needs antifreeze to protect the coaxial heat exchanger from freezing and rupturing.
Section 11: Antifreeze Table 4: Pipe Fluid Volume Notes: 1. Consult with your representative or distributor if you have any questions regarding antifreeze selection or use. 2. All antifreeze suppliers and manufacturers recommend the use of either de-ionized or distilled water with their products. Type Antifreeze Charging Calculate the total amount of pipe in the system and use Table 4 to calculate the amount of volume for each specific section of the system.
Section 11: Antifreeze Table 5: Antifreeze Percentages by Volume Minimum Temperature for Freeze Protection Type of Antifreeze 10°F (-12.2°C) 15°F (-9.4°C) 20°F (-6.7°C) 25°F (-3.9°C) ProCool (Ethanol) 25% 22% 17% 12% Methanol 25% 21% 16% 10% Propylene Glycol 38% 30% 22% 15% All antifreeze solutions are shown in pure form - not premixed NOTE: Most manufacturers of antifreeze solutions recommend the use of de-ionized water.
Section 12: Desuperheater Installation Desuperheater Installation Units that ship with the desuperheater function also ship with a connection kit. Note: Copper is the only approved material for piping the desuperheater. Note: Desuperheater capacity is based on 0.4 GPM Flow per nominal ton at 90°F entering hot water temperature. Note: Units that are shipped with a desuperheater do not have the desuperheater pump wires connected to the electrical circuit, to prevent accidentally running the pump while dry.
Section 12: Desuperheater Installation 15. Shut off the valve installed in the desuperheater line close to the tee in the cold water line. Open the air vent and all shut off valves installed in the “hot water out”. 16. Turn the water supply to the water heater on. Fill water heater. Open highest hot water faucet to purge air from tank and piping. 17. Flush the interconnecting lines, and check for leaks. Make sure air vent is shutoff when water begins to drip steadily from the vent. 18.
Section 12: Desuperheater Installation Figure 12: Typical Desuperheater Installation &ROG :DWHU +RW :DWHU 6XSSO\ 6KXWRII 9DOYHV $LU 9HQW /RFDWHG DW 6\VWHP +LJK 3RLQW Unit Water Connection Detail Air Coil Hot Water Out Hot Water In :DWHU +HDWHU RU 6WRUDJH 7DQN 3/4” Copper Adapter Fitting 'UDLQ 9DOYH 6KXWRII 9DOYHV 'HVXSHUKHDWHU 2XW 'HVXSHUKHDWHU ,Q Figure 13: Desuperheater Installation with Preheat Tank +RW :DWHU &ROG :DWHU 6XSSO\ &ROG :DWHU 6XSSO\ 6KXWRII 9DOYHV +RW :
Section 13a: Unit Operating Modes Unit Operation: Air Heating Mode (Water-to-Air) NOTES: Red text indicates thermostat inputs or aquastat inputs. “HW” is the aquastat input. “HW-1” and “HW-2” are always activated together, and act as a single output from a control standpoint.
Section 13b: Unit Operating Modes Unit Operation: Air Cooling Mode (Water-to-Air) NOTES: Red text indicates thermostat inputs or aquastat inputs. “HW” is the aquastat input. “HW-1” and “HW-2” are always activated together, and act as a single output from a control standpoint.
Section 13c: Unit Operating Modes Unit Operation: Water Heating Mode (Water-to-Water) NOTES: Red text indicates thermostat inputs or aquastat inputs. “HW” is the aquastat input. “HW-1” and “HW-2” are always activated together, and act as a single output from a control standpoint.
Section 14a: Controls MICROPROCESSOR FEATURES AND OPERATION Roth geothermal heat pump controls provide a unique modular approach for controlling heat pump operation. The control system uses one, two, or three printed circuit boards, depending upon the features of a particular unit. This approach simplifies installation and troubleshooting, and eliminates features that are not applicable for some units.
Section 14a: Controls CFM Figure 14: ECM Board Layout COM W1 COM2 24VAC XFMR SEC ECM Board O/B Y1 G W1 R ODD W2 Y2 C Loop Pump Circuit Breakers The loop pump(s) and desuperheater pump are protected by control box mounted circuit breakers for easy wiring of pumps during installation. Circuit breakers eliminate the need to replace fuses. Safety Controls The control receives separate signals for high pressure, low pressure, low water flow, and condensate overflow faults.
Section 14a: Controls Lockout with Emergency Heat While in lockout mode, if the thermostat is calling for backup heat, emergency heat mode will occur. Hot Water Pump Control Controls for high water temperature and low compressor discharge line temperature prevent the hot water (desuperheater) pump from operating when the leaving water temperature is above 130°F, or when the compressor discharge line is too cool to provide adequate water heating.
Section 14a: Controls Figure 15: Lockout Board Layout CCG R2 R1 C2 C1 CC Lockout Board A C R Y L O WSD TEST O/V HP HP LP LP FS FS CO CO Status Table 6: LED Identification LED Color Location1 Function Normal Operation Fault Retry2 Lockout2 3 ON3 Green Top High Pressure OFF Flashing Orange 2nd Low Pressure OFF Flashing3 ON3 Red 3rd Water Flow OFF Flashing3 ON3 Yellow 4th Condensate Overflow OFF Flashing3 ON3 Green Bottom Status Flashing4 Flashing5 Flashing4 Notes:
Section 14a: Controls Table 7: ECM Fan Performance - Two-Stage Compressor Units ECM Fan Performance - Two-Stage Compressor Units Model 1 024 036 048 060 072 Program Heating Modes Cooling Modes Dehumidification Mode6 1st Stage 2nd Stage 1st Stage 2nd Stage 1st Stage 2nd Stage 2 Only Fan DIP Switch Settings4 S1 S2 S3 S4 S5 S6 S7 S8 A 800 1050 800 1050 680 890 525 ON OFF ON OFF ON OFF OFF OFF B 700 950 700 950 595 810 475 ON OFF OFF OFF ON OFF OFF OFF
Section 14a: Controls Roth 50 RCT Models, 16 Feb 2012D
Section 14b: Combination Unit Controls COMBINATION UNIT CONTROLS The hot water (combination unit) control board prioritizes unit operation even when there are simultaneous calls from the thermostat and aquastat. Inputs to the board include thermostat signals as well as an aqua-stat input. The hot water board acts as a “traffic director,” since all inputs are sent to the hot water board first.
Section 14b: Combination Unit Controls Table 8: Combination Controls DIP Switch Settings Operation Mode Fan Mode DIP Switch 1 2 3 4 Hot Water Priority Fan OFF during HW mode regardless of ‘G’ ON OFF OFF ON Hot Water Priority with Electric Heat Fan OFF in HW mode except in Elec Ht oper OFF ON OFF ON Forced air Priority Fan OFF during HW mode regardless of ‘G’ ON ON OFF ON Shared Priority (check every 20 min) Fan OFF during HW mode regardless of ‘G’ OFF OFF ON ON Shared Priority
Section 14b: Combination Unit Controls OUTPUT CONTROL thermostat call, the board will control the fan output based upon priority. For example, if the board is set for “Hot Water Priority,” and the fan control is set for “Fan OFF except in Hot Water Priority with Electric Heat”, the board will ignore all thermostat inputs (including the “G” input) until the aqua-stat is satisfied. If continuous fan is desired, DIP switch #4 should be in the OFF position.
Section 14b: Combination Unit Controls SEQUENCE OF OPERATION: Combination Units Heating, 1st Stage (Y1,G) Forced Air The ECM fan is started immediately at 75% (of 1st stage operation) CFM level, first stage compressor and the loop/desuperheater pump(s) are energized 10 seconds after the “Y1” input is received. The ECM fan adjusts to 100% (of 1st stage operation) CFM level 30 seconds after the “Y1” input.
Section 15: Accessories Table 10: Auxiliary Heater Electrical Data TECHNICAL DATA (AHTR Electric Heaters only) Single Phase w/ Circuit Breaker Heater Model AHTR101B Supply Voltage 240 10 208 7.5 240 AHTR151B 240 208 208 240 AHTR201B Heat kW 240 208 208 15 11.25 20 15 Maximum OverCurrent Protective Device (AMPS.) Supply Circuit Number Heater kW Per Circuit FLA Total AMPS MCA Min Circuit Ampacity Single 5 41.7 52.1 Single 3.75 36.1 45.1 Mult. 1 5 20.8 26.0 30 Mult.
Section 15: Accessories APSMA PUMP SHARING MODULE The pump sharing module, part number APSMA, is designed to allow two units to share one flow center. With the APSMA module, either unit can energize the pump(s). Connect the units and flow center as shown in Figure 18, below. Figure 19 includes a schematic of the board. The module must be mounted in a NEMA enclosure or inside the unit control box. Local code supersedes any recommendations in this document.
Section 16: Troubleshooting PERFORMANCE CHECK Heat of Extraction(HE)/Rejection(HR) Record information on the Unit Start-up Form Equipment should be in full load operation for a minimum of 10 minutes in either mode – WITH THE HOT WATER GENERATOR TURNED OFF. A 10% variance from Spec Manual is allowed. Always use the same pressure gauge & temperature measuring device. Water flow must be in range of Specification Manual. If system has too much water flow, performance problems should be expected. 1.
Section 16: Troubleshooting A: UNIT WILL NOT START IN EITHER CYCLE Thermostat Set thermostat on heating and highest temperature setting. Unit should run. Set thermostat on cooling and lowest temperature setting. Unit should run. Set fan to On position. Fan should run. If unit does not run in any position, disconnect wires at heat pump terminal block and jump R, G, Y. Unit should run in heating. If unit runs, replace thermostat with correct thermostat only. Loose or broken wires Tighten or replace wires.
Section 16: Troubleshooting G: NO WATER FLOW Pump Module Make sure Pump Module is connected to the control box relay (check all electrical connections). For nonpressurized systems, check water level in Pump Module. If full of water, check pump. Close valve on the pump flanges and loosen pump. Take off pump and see if there is an obstruction in the pump. If pump is defective, replace. For pressurized systems, check loop pressure. Repressurize if necessary.
Section 16: Troubleshooting O: COMPRESSOR WON’T START &KHFN IRU SURSHU FRPSUHVVRU QDPHSODWH YROWDJH 2. 'RHV &RPSUHVVRU GUDZ FXUUHQW ZKHQ YROWDJH LV
Section 16: Troubleshooting Table 11: Refrigeration Troubleshooting Mode Discharge Pressure Suction Pressure Superheat Subcooling Air TD Water TD Compressor Amps Heat Low Low High Low Low Low Low Cool Low Low High Low Low Low Low Heat High High/Normal Normal High High Normal High Cool High High/Normal Normal High Normal High High Heat High High/Normal Normal High/Normal High Low High Cool Low Low/Normal Low Normal High Low High/Normal Low Source Water
Roth 62 RCT Models, 16 Feb 2012D
Section 17: Forms - Troubleshooting Customer/Job Name:____________________________________________ Date:________________________________ Model #:__________________________________________ Serial #:____________________________________________ HE or HR = GPM x TD x Fluid Factor (Use 500 for water; 485 for antifreeze) Coax Suction Heating Mode Air Coil Antifreeze Type:____________________________________ SH = Suction Temp. - Suction Sat. SC = Disch. Sat. - Liq. Line Temp.
EQUIPMENT START-UP FORM Customer Name:_________________________________________________________________ Customer Address:_____________________________________________________________________________________ Model #:__________________________________________ Serial #:____________________________________________ Dealer Name:__________________________________________________________________________________________ Distributor Name:_____________________________________________ Start-up Date:____________________
Equipment Start-Up Process Check the following before power is applied to the equipment Caution: Do not start-up the unit until the new structure is ready to be occupied Electrical: Geothermal unit high voltage wiring is installed correctly Geothermal unit high voltage wiring and breaker are the correct size Auxiliary electric heaters are wired and installed correctly Circulating pumps are wired and fused (if necessary) correctly Desuperheater pump is NOT wired, unless piping is complete and all air is pur
Section 18: Warranty STANDARD RESIDENTIAL WARRANTY Roth Industries, Inc. for brand: “TerraStar” Residential Single Family 10 YEAR LIMITED WARRANTY (10/5/5) Roth Industries, Inc. warrants the refrigerant system components, to include the compressor, air coil, coaxial heat exchanger(s), expansion valve and reversing valve, to be free from defects in material and workmanship for a period of ten (10) years from the date of delivery to the original purchaser-user, transferable to new owner.
