Nordic R Series Installation And Service Manual
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Nordic R Series Installation And Service Manual

Liquid to air geothermal heat pumps
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Installation and Service Manual
R/RH-Series
Liquid to Air Geothermal Heat Pumps
Two-Stage R410a
Model Sizes 45-80
Maritime Geothermal Ltd.
info@nordicghp.com
P.O. Box 2555, 170 Plantation Road
www.nordicghp.com
Petitcodiac, NB E4Z 6H4
001200MAN-09
(506) 756-8135
1-Nov-2021
Page 1
001200MAN-09
1-Nov-2021

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  • Page 1 Installation and Service Manual R/RH-Series Liquid to Air Geothermal Heat Pumps Two-Stage R410a Model Sizes 45-80 Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 001200MAN-09 (506) 756-8135 1-Nov-2021 Page 1 001200MAN-09 1-Nov-2021...
  • Page 2 SAFETY PRECAUTIONS WARNING: Ensure all access panels are in place and properly secured before applying power to the unit. Failure to do so may cause electrical shock. WARNING: Before performing service or maintenance on the heat pump system, ensure all power sources are DISCONNECTED.
  • Page 3 APPLICATION TABLE OUTDOOR SIZE FUNCTION REFRIGERANT VOLTAGE COMPRESSOR FAN/CASE REVISIONS COIL SDELF R-45 HACW SDERF SDELF R-55 HACW SDERF SDELF R-65 HACW SDERF SDELF R-75 HACW SDERF SDELF R-80 HACW SDERF SDELF RH-45 HACW SDERF SDELF RH-55 HACW SDERF SDELF RH-65 HACW SDERF...

  • Page 4: Table Of Contents

    Outdoor Loop ................ 17 Electrical Box Layout - R-80 (208/230-1-60) ......65 002511PDG - Typical Loop Connections - R Series ....18 Electrical Box Layout - RH 45-75 (208/230-1-60) ....66 000970PDG - Desup. Connection to DHW Pre-Heat Tank ..19 Wiring Diagram (208-3-60) ...........

  • Page 5: Tables & Documents

    001827CDG - Typical Thermostat Connections ..................15 001901PDG - Wiring For Best Cooling Mode Dehumidification ............16 002511PDG - Typical Loop Connections - R Series ................18 000970PDG - Desuperheater Connection to DHW Pre-Heat Tank ............19 001201CDG - Typical Duct and Condensate Connections ..............21 000608INF - Typical Horizontal Ground Loop Configuration ..............

  • Page 6: R/Rh System Description

    General Overview In heating mode, the heat pump heats warm air in a duct The Nordic R/RH-series is a package water source heat system. As the unit operates, heat is extracted from the ground pump that can heat or chill air in a forced air duct system. The loop or well water.

  • Page 7: Sizing

    The second has a wider element profile for installation which is influenced by, for example, the number of levels, the outside the unit, in the ductwork. For RH series or for R series size of the windows, the orientation of the home, attached gar-...

  • Page 8: Installation Basics

    Installation Basics Unpacking the Unit Unit Placement Ducted or forced air heat pumps should be centrally located When the heat pump reaches its destination it should be in the home with respect to the conditioned space. This provides unpacked to determine if any damage has occurred during the best in economy and comfort and usually can be shipment.

  • Page 9: R-Series Air Outlet Orientation

    RH-Series Air Outlet Orientation and general maintenance. For vertical R-series, no access is required on the back side. Ensure the unit is level to eliminate The horizontal RH-series has a field configurable blow- any possible condensate draining issues. er position, resulting in straight through (side) or end air dis- The heat pump comes equipped with an air filter rack which charge.

  • Page 10: Plenum Heater Installation (Optional)

    Air Return Orientation Plenum Heater Installation (Optional) The heat pump can be ordered as left or right air return Be sure to specify the type of installation anticipated, from the factory. This must be specified at time of order as the since the plenum heater models are different for internal or physical construction of the two configurations is different.

  • Page 11: 001915Inf - Internal Plenum Heater Installation

    1-Nov-2021 Page 11 001200MAN-09...

  • Page 12: Wiring

    Wiring Power Supply Connections TABLE 6 - Ground Loop Circulator Connections The heat pump has a concentric 1.093” / 0.875” knockout Terminal Description for main power supply connection from the breaker panel to the 115V electrical box. There are also 0.875” knockouts and plastic Connection for 115V circulator grommet(s) for connections to plenum heater power supply, 115V...

  • Page 13: Thermostat Requirements

    Thermostat Requirements Airflow Adjustment The unit is equipped with a direct drive ECM fan motor for A three-stage heating and two stage cooling heat pump maximum efficiency. The motor features a soft start which pro- configurable thermostat is required for two-stage models. The vides a smooth, quiet ramp up to operating speed .

  • Page 14: Safety Controls

    Safety Controls TABLE 9 - Control Board Fault Codes The heat pump has two important built in safety controls Fault LED Flashes which are designed to protect the unit from situations which could damage it should the operation of the refrigeration circuit High Pressure fall outside the allowable operating range.

  • Page 15: 001827Cdg - Typical Thermostat Connections

    1-Nov-2021 Page 15 001200MAN-09...

  • Page 16: 001901Pdg - Wiring For Best Cooling Mode Dehum

    1-Nov-2021 Page 16 001200MAN-09...

  • Page 17: Piping

    Piping Domestic Hot Water Condensate Drain (Desuperheater) Connections The unit comes equipped with one 3/4” female PVC socket drain connection. This drain allows the condensate which forms The connections for the DHW circuit are 1/2” brass during the air conditioning cycle to be removed from the unit. FPT fittings.

  • Page 18: 002511Pdg - Typical Loop Connections - R Series

    1-Nov-2021 Page 18 001200MAN-09...

  • Page 19: 000970Pdg - Desup. Connection To Dhw Pre-Heat Tank

    1-Nov-2021 Page 19 001200MAN-09...

  • Page 20: Ductwork

    Ductwork Zoning Duct Systems - Grill Layout Zoning can be done with heat pumps that have 2-stage Most forced air heating systems in homes have the floor compressors, but only to a limited extent. It is recommended grills placed around the perimeter of the room. Supply grills that no zone be less than 1/3 the total area, to avoid problems of should be placed under a window when possible to help prevent high airflow and noise through one zone or safety control trips...

  • Page 21: 001201Cdg - Typical Duct And Condensate Connections

    1-Nov-2021 Page 21 001200MAN-09...

  • Page 22: Duct Sizing Guide

    TABLE 11 - Duct Sizing Guide (external static of 0.20” H Minimum Return Air Airflow Diameter Airflow Duct Area Rectangular Equivalents (in) Diameter (CFM) (in) (L/s) (sq.in) (in) 2.25 x 10 3 x 8 3.5 x 6 4 x 5.5 5 x 5 2.25 x 10 3 x 8...

  • Page 23: Ground Loop Installations

    Ground Loop Installations Refer to diagrams 000608INF & 000609INF at the end of Adjust the circulator pump module valves to connect the this section for typical ground loop configurations. They are for purge cart to the ground loop. Begin pumping water through the reference only, and should not be used to replace formal train- ground loop, ensuring that the intake of the pump stays ing and computerized loop design.

  • Page 24: Adding Antifreeze Solution

    Once the lines have been filled and no more air bubbles are TABLE 13 - Volume of fluid per 100 ft. of pipe appearing in the line, adjust the circulator pump module valves Volume /100ft. to circulate water through the heat pump using the same technique as described above.

  • Page 25: 000608Inf - Typical Horiz. Ground Loop Configuration

    1-Nov-2021 Page 25 001200MAN-09...

  • Page 26: 000609Inf - Typical Vert. Ground Loop Configuration

    1-Nov-2021 Page 26 001200MAN-09...

  • Page 27: 000906Cdg - Circulator Pump Module Installation

    1-Nov-2021 Page 27 001200MAN-09...

  • Page 28: 001823Cdg - Dual Flow Pump Module Installation

    1-Nov-2021 Page 28 001200MAN-09...

  • Page 29: 002336Pdg - Pump Module Inst - 2 Units On 1 Loop

    1-Nov-2021 Page 29 001200MAN-09...

  • Page 30: Open Loop Installations

    Open Loop Installations Well Water Temperature tween the pumping fluid level and the pump intake) would con- tribute linearly to the flow rate should a larger pump be installed. The temperature of the well water should be a minimum of 41°F (5°C), and should normally be 45°F+ (7°C+).

  • Page 31: Water Valve

    A return well should be a minimum of 80 ft. from the supply Figure 2: Open Loop Accessories & Tools well for residential applications. The water returned to the well will not necessarily be pumped into the same aquifer, depend- Cumulative Water ing on underground conditions.

  • Page 32: Submersible Pump Selection

    Plumbing the Heat Pump low refrigerant discharge pressure when in cooling mode. Dole valves are available as an accessory. The port connections for the Outdoor Loop are 1” brass FPT fittings. They are marked as OUTDOOR IN and OUT. Dole valves can emit a ‘whistling’ sound if the pressure drop through them is high.

  • Page 33: 000907Cdg - Typical Open Loop Installation

    1-Nov-2021 Page 33 001200MAN-09...

  • Page 34: 001822Cdg - Dual Flow Open Loop Installation

    1-Nov-2021 Page 34 001200MAN-09...

  • Page 35: 000619Inf - Ground Water Disposal Methods

    1-Nov-2021 Page 35 001200MAN-09...

  • Page 36: Startup Procedure

    Startup Procedure The R/RH-Series Startup Record located in this manual is used in conjunction with this startup procedure to provide a detailed record of the installation. A completed copy should be left on site, a copy kept on file by the installer and a copy should be sent to Maritime Geothermal Ltd.

  • Page 37: Unit Startup

    Unit Startup The unit is now ready to be started. The steps below outline the procedure for starting the unit and verifying proper operation of the unit. It is recommended that safety glasses be worn during the following procedures. Preparation: 1.

  • Page 38: Startup Record

    Startup Record: R/RH-Series Installation Site Startup Date Installer City Company Province Model Country Serial # Homeowner Name Homeowner Phone # Check boxes unless asked to record data. Circle data units. PRE-START INSPECTION Ductwork Ductwork is completed, dampers/ diverters are adjusted Registers are open and clear of objects Air filter and end cap are installed Condensate Drain is connected, properly vented and free of debris...

  • Page 39: Routine Maintenance

    Routine Maintenance MAINTENANCE SCHEDULE Item Interval Procedure Air Filter 6 months Inspect for dirt. Replace if necessary. Compressor 1 year Inspect for pitted or burned points. Contactor Replace if necessary. Condensate 1 year Inspect for clogs. Clean if necessary. Drain Control Board When heat pump Check status light for faults.
  • Page 40 Coaxial Heat Exchanger Flushing Procedure - Closed Ground Loop 1. Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position. 2. Connect a compressed air and a drain pipe to the pump module purge ports and blow the anti-freeze solution into a clean 5 gallon bucket.

  • Page 41: Troubleshooting Guide

    Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump. If the problem is with the domestic hot water or the plenum heater, proceed to those sections at the end of the troubleshooting guide. Repair procedures and reference refriger- ation circuit diagrams can be found at the end of the troubleshooting guide.
  • Page 42 FAULT CODE TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Fault Code 1 High operating refrigerant Using a refrigeration gauge set, veri- See “High Discharge Pressure” in (High Pressure pressure fy that high pressure approaches or Heating Mode / Cooling Mode Control) exceeds 565psi with compressor on.
  • Page 43 COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Compressor will Faulty Measuring from C on the terminal Replace control board control board not start strip, verify there is voltage at Y, HP1, HP2, LP1, LP2, and both flow pins but no voltage present at CC. Faulty run capacitor Check value with capacitance meter.
  • Page 44 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Discharge Low airflow See Fan Troubleshooting section Correct the problem. Pressure TXV adjusted too far Verify superheat. It should be be- Adjust TXV to obtain 8-12°F closed tween 8-12°F (3-6°C). Superheat will (3-6°C) superheat.
  • Page 45 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High Suction Leaking reversing valve Reversing valve is the same temper- Tap reversing valve, and switch it Pressure ature on both ends of body, com- back and forth between heating (may appear to mon suction line is warm, compres- and cooling positions.
  • Page 46 OPERATION TROUBLESHOOTING - COOLING MODE Fault Possible Cause Verification Recommended Action High Discharge Unit is overcharged High subcooling, low delta T across Remove 1/2lb of refrigerant at a pressure (Only possible if unit has water coil. time and verify that the discharge been field serviced and pressure reduces.
  • Page 47 FAN/BLOWER TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Low Airflow Dirty air filter Inspect. Replace. Dirty air coil Inspect. Clean. Poor Ductwork Measure delta T between supply The ECM fan will provide proper and return ducts at the unit, it in airflow up to 0.5 inH2o for 1/2HP heating mode, it should not be motors and 0.7 inH2o for 1HP...
  • Page 48 PLENUM HEATER TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action No 230VAC Disconnect switch open Verify disconnect switch is in the ON Determine why the disconnect across plenum (if installed) position. switch was opened, if all is OK heater L1 and L2 close the switch.
  • Page 49 PLENUM HEATER TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action No 24VAC signal Faulty Plenum Heater 24VAC is present across pin 1 and Replace relay. from 1 to ground Relay in heat pump pin 3 of the relay, 24VAC is present at the plenum from heat pump terminal strip I to heater control...

  • Page 50: Repair Procedures

    Repair Procedures Pumpdown Procedure 1. Connect the refrigerant recovery unit to the heat pump’s internal service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual. Plan to dispose of refrigerant if there was a compressor burnout.

  • Page 51: Compressor Replacement Procedure

    Compressor Replacement Procedure 1. Pump down the unit as per the Pumpdown Procedure above. If there was a compressor burn out (motor failure), the refrigerant cannot be reused and must be disposed of according to local codes. 2. Disconnect piping. 3.

  • Page 52: Model Specific Information

    Model Specific Information Table 15 - Refrigerant Charge MODEL Refrigerant Oil Type R/RH-45 R410a R/RH-55 R410a R/RH-65 10.0 R410a R/RH-75 12.5 R410a R-80 11.5 R410a - Oil capacity is marked on the compressor label. - Refrigerant charge is subject to revision; actual charge is indicated on the unit nameplate.

  • Page 53: Standard Capacity Ratings

    Standard Capacity Ratings Standards C13256-1 / ISO13256-1 / ARI 13256-1 Table 18 - Standard Capacity Ratings - Ground Loop Heating* 60Hz STAGE 1 - ELT 41°F (5°C) EAT 68°F (20°C) * 15% Methanol by Weight Ground Loop Fluid STAGE 2 - ELT 32°F (0°C) Nominal Input Liquid Flow...

  • Page 54: Pressure Drop Data

    Pressure Drop Data Table 22: Loop Pressure Water 104°F Water 50°F 15% Methanol 32°F 35% prop. glycol 32°F Drop Data 0.25 0.32 0.38 0.44 0.50 R/RH- 0.57 0.63 0.69 0.76 0.82 11.3 0.88 12.5 0.95 0.38 0.44 0.50 0.57 0.63 R/RH- 0.69 0.76...
  • Page 55 Table 22: Loop Pressure Water 104°F Water 50°F 15% Methanol 32°F 35% prop. glycol 32°F (cont’d) Drop Data 0.38 0.44 0.50 0.57 0.63 R/RH- 0.69 0.76 0.82 0.88 0.95 1.01 0.38 0.44 0.50 0.57 0.63 0.69 R/RH- 0.76 0.82 0.88 0.95 1.01 1.07...

  • Page 56: Performance Tables: R/Rh-45

    Performance Tables R/RH-45-HACW-P-1T R410a, 60 Hz, ZPS30K5E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A) Power (W) (°F) Temp. (cfm) (°F) (°F)

  • Page 57: Performance Tables: R/Rh-55

    Performance Tables R/RH-55-HACW-P-1T R410a, 60 Hz, ZPS40K5E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A) Power (W) (°F) Temp. (cfm) (°F) (°F)

  • Page 58: Performance Tables: R/Rh-65

    Performance Tables R/RH-65-HACW-P-1T R410a, 60 Hz, ZPS51K5E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A) Power (W) (°F) Temp. (cfm) (°F) (°F)

  • Page 59: Performance Tables: R/Rh-75

    Performance Tables R/RH-75-HACW-P-1T R410a, 60 Hz, ZPS60K5E-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A) Power (W) (°F) Temp. (cfm) (°F) (°F)

  • Page 60: Performance Tables: R-80

    Performance Tables R-80-HACW-P-1S R410a, 60 Hz, ZP70KWE-PFV OUTDOOR LOOP (15% Methanol) ELECTRICAL INDOOR LOOP (Air) Evap. Flow Delta T Heat Abs. Compressor Input Cond. Airflow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Current (A) Power (W) (°F) Temp. (cfm) (°F) (°F)

  • Page 61: Airflow Data

    Airflow Data Table 23: MED Airflow (nominal) STAGE 2 STAGE 1 FAN ONLY (Recirculation) AR1-AR2 AR1-AR2 AR1-AR2 Model Full Full Full reduction reduction reduction 1200 1020 1030 1500 1275 1240 1054 1900 1615 1540 1309 1064 2100 1785 1660 1411 1176 1000 2400...

  • Page 62: Electrical Specifications

    Electrical Specifications Electrical Specifications Out- Max. Min. Power Supply Compressor door Fuse/ Wire TABLE Elec. Circ. Breaker Size Code V-ø-Hz Max A Amps Amps Amps 208/230-1-60 14.1 22.4 25.9 #8-2* 208-3-60 17.9 20.3 #10-3* 265/277-1-60 13.0 16.7 20.0 #10-2 R/RH- 460-3-60 10.7 #14-4...

  • Page 63: Wiring Diagram (208/230-1-60)

    Wiring Diagram (208/230-1-60) 1-Nov-2021 Page 63 001200MAN-09...

  • Page 64: Electrical Box Layout - R 45-75 (208/230-1-60)

    Electrical Box Layout - R 45-75 (208/230-1-60) 1-Nov-2021 Page 64 001200MAN-09...

  • Page 65: Electrical Box Layout - R-80 (208/230-1-60)

    Electrical Box Layout - R-80 (208/230-1-60) 1-Nov-2021 Page 65 001200MAN-09...

  • Page 66: Electrical Box Layout - Rh 45-75 (208/230-1-60)

    Electrical Box Layout - RH 45-75 (208/230-1-60) 1-Nov-2021 Page 66 001200MAN-09...

  • Page 67: Wiring Diagram (208-3-60)

    Wiring Diagram (208-3-60) 1-Nov-2021 Page 67 001200MAN-09...

  • Page 68: Electrical Box Layout - R 45-75 (208-3-60)

    Electrical Box Layout - R 45-75 (208-3-60) 1-Nov-2021 Page 68 001200MAN-09...

  • Page 69: Electrical Box Layout - R-80 (208-3-60)

    Electrical Box Layout - R-80 (208-3-60) 1-Nov-2021 Page 69 001200MAN-09...

  • Page 70: Electrical Box Layout - Rh 45-75 (208-3-60)

    Electrical Box Layout - RH 45-75 (208-3-60) 1-Nov-2021 Page 70 001200MAN-09...

  • Page 71: Wiring Diagram (265/277-1-60)

    Wiring Diagram (265/277-1-60) 1-Nov-2021 Page 71 001200MAN-09...

  • Page 72: Electrical Box Layout - R 45-75 (265/277-1-60)

    Electrical Box Layout - R 45-75 (265/277-1-60) 1-Nov-2021 Page 72 001200MAN-09...

  • Page 73: Electrical Box Layout - R-80 (265/277-1-60)

    Electrical Box Layout - R-80 (265/277-1-60) 1-Nov-2021 Page 73 001200MAN-09...

  • Page 74: Electrical Box Layout - Rh 45-75 (265/277-1-60)

    Electrical Box Layout - RH 45-75 (265/277-1-60) 1-Nov-2021 Page 74 001200MAN-09...

  • Page 75: Wiring Diagram (460-3-60)

    Wiring Diagram (460-3-60) 1-Nov-2021 Page 75 001200MAN-09...

  • Page 76: Electrical Box Layout - R 45-75 (460-3-60)

    Electrical Box Layout - R 25-75 (460-3-60) 1-Nov-2021 Page 76 001200MAN-09...

  • Page 77: Electrical Box Layout - R-80 (460-3-60)

    Electrical Box Layout - R-80 (460-3-60) 1-Nov-2021 Page 77 001200MAN-09...

  • Page 78: Electrical Box Layout - Rh 45-75 (460-3-60)

    Electrical Box Layout - RH 25-75 (460-3-60) 1-Nov-2021 Page 78 001200MAN-09...

  • Page 79: Refrigeration Circuit - Heating Mode

    1-Nov-2021 Page 79 001200MAN-09...

  • Page 80: Refrigeration Circuit - Cooling Mode

    1-Nov-2021 Page 80 001200MAN-09...

  • Page 81: Dimensions: R-45 Left Return

    Dimensions: R-45 Left Return 1-Nov-2021 Page 81 001200MAN-09...

  • Page 82: Dimensions: R-45 Right Return

    Dimensions: R-45 Right Return 1-Nov-2021 Page 82 001200MAN-09...

  • Page 83: Dimensions: R-55/65/75 Left Return

    Dimensions: R-55/65/75 Left Return 1-Nov-2021 Page 83 001200MAN-09...

  • Page 84: Dimensions: R-55/65/75 Right Return

    Dimensions: R-55/65/75 Right Return 1-Nov-2021 Page 84 001200MAN-09...

  • Page 85: Dimensions: R-80 Left Return

    Dimensions: R-80 Left Return 1-Nov-2021 Page 85 001200MAN-09...

  • Page 86: Dimensions: R-80 Right Return

    Dimensions: R-80 Right Return 1-Nov-2021 Page 86 001200MAN-09...

  • Page 87: Dimensions: Rh-45 Left Return

    Dimensions: RH-45 Left Return 1-Nov-2021 Page 87 001200MAN-09...

  • Page 88: Dimensions: Rh-45 Right Return

    Dimensions: RH-45 Right Return 1-Nov-2021 Page 88 001200MAN-09...

  • Page 89: Dimensions: Rh-55/65/75 Left Return

    Dimensions: RH-55/65/75 Left Return 1-Nov-2021 Page 89 001200MAN-09...

  • Page 90: Dimensions: Rh-55/65/75 Right Return

    Dimensions: RH-55/65/75 Right Return 1-Nov-2021 Page 90 001200MAN-09...

  • Page 91: Warranty

    Warranty: R/RH-Series RESIDENTIAL LIMITED EXPRESS WARRANTY Unless a statement is specifically identified as a warranty, statements made by Maritime Geothermal Ltd. (“MG”) or its representatives relating to MG’s products, whether oral, written or contained in any sales literature, catalogue or agreement, are not express warranties and do not form a part of the basis of the bargain, but are merely MG’s opinion or commendation of MG’s products.

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