NORDIC RH-Series 25-80 geothermal heat pump Installation and Service Manual

Installation and Service Manual

NORDIC® RH-Series

Horizontal Two-Stage R410a

Model Sizes 25-80

Horizontal Liquid to Air

Geothermal Heat Pumps

Maritime Geothermal Ltd.

P.O. Box 2555

Petitcodiac, N.B. E4Z 6H4

Ph. (506) 756-8135

ISSUE 02: 08 OCT 2010

Email: [email protected]

Web: www.nordicghp.com

Document Number: 000821MAN-01

000821MAN-01

!

WARNING:

Ensure all access panels are in place and properly secured before applying power to the unit.

Failure to do so may cause risk of electrical shock.

WARNING:

Before performing service or maintenance on the heat pump system, ensure all power sources

are DISCONNECTED. Electrical shock can cause serious personal injury or death.

WARNING:

Heat pump systems contain refrigerant under high pressure and as such can be hazardous to

work on. Only qualified service personnel should install, repair, or service the heat pump.

CAUTION:

Safety glasses and work gloves should be worn at all times whenever a heat pump is serviced. A

fire extinguisher and proper ventilation should be present whenever brazing is performed.

CAUTION:

Venting refrigerant to atmosphere is illegal. A proper refrigerant recovery system must be

employed whenever repairs require removal of refrigerant from the heat pump.

Series:

RH = Horizontal Slim-Line

Active Cooling Liquid to Air

MODEL NOMENCLATURE

RH—65—HACW—P—1T—C—SDELF—xx

Nominal Size:

25 = 2 Ton

45 = 3 Ton

55 = 4 Ton

65 = 5 Ton

75 = 6 Ton

80 = 6 Ton Single Stage

Functions:

H = Heating

AC = Active Cooling

W = Domestic Hot Water

Revision:

01, 02 etc.

Fan Outlet Orientation:

F = Field Configurable

Fan Return Orientation:

L = Left Return

R = Right Return

Fan Motor:

E = ECM (Variable Speed)

Fan Type:

D = Direct Drive

Refrigerant:

P = R410a Air Coil:

S = Standard

Voltage Code:

1 = 230-1-60 VAC

2 = 208-3-60 VAC

6 = 220-1-50 VAC

7 = 380-3-50 VAC

Outdoor Loop Exchanger:

C = Copper

Z = Cupro-Nickel (CuNi)

Compressor Stages*:

S = 1 Stage

T = 2 Stage

* 2 stage unless unavailable due to voltage code, refer to the Electrical Tables .

000821MAN-01 Page 2 ISSUE 02: 08 OCT 2010

SIZE

25

45

55

65

75

80

APPLICATION TABLE

FUNCTION

HAC

HACW

REFRIGERANT

P

VOLTAGE STAGES OUTDOOR

COIL

1 T

2 S

6 S

7 S

C or Z

1 T

2 S

6 S

7 S

HAC

HACW

P

1 T

2 T

6 S

7 T

C or Z

1 T

2 T

6 S

7 T

HAC

HACW

HAC

HACW

HAC

HACW

HAC

HACW

P

P

P

1 T

2 T

6 S

7 T

C or Z

1 T

2 T

6 S

7 T

1 T

2 T

6 S

7 T

C or Z

1 T

2 T

6 S

7 T

1 T

2 S

6 S

7 S

C or Z

1 T

2 S

6 S

7 S

FAN/CASE

SDELF or

SDERF

SDELF or

SDERF

SDELF or

SDERF

SDELF or

SDERF

SDELF or

SDERF

REVISIONS

05 04 03

04

04

04

04

04

04

04

05 04 03

04

04

04

04

04

04

04

05 04 03

04

04

04

04

04

04

04

05 04 03

04

04

04

04

04

04

04

05 04 03

04

04

04

04

04

04

04

P

1 S

C or Z

1 S

SDELF or

SDERF

This manual applies only to the models and revisions listed in this table

05 04 03

05 04 03

ISSUE 02: 08 OCT 2010 Page 3 000821MAN-01

Table of Contents

TABLES, DIAGRAMS & DRAWINGS: ……..……...………….……………………………………………………………… PAGE 5

INSTALLATION INFORMATION: …………………...………….……………………………………………………………… PAGE 6

Unit description: …………………………………………………………………………………………………..…... Page 6

Unpacking the unit: …………………………………………………………………………………………………... Page 6

Optimum Placement: …………………………………………………………………………………………………. Page 6

Electrical Connections: ……………………………………………………………………………………………… Page 6

Circulator Pump Module Wiring (Ground Loop Only): …………………………………………………………. Page 6

Thermostat Requirements: ………………………………………………………………………………………….. Page 6

Fan Motor: ……………………………………………………………………………………………………………… Page 7

Fan Return Orientation: ………………………...…………………………………………………………………… Page 7

Control Transformer : ……..…………………...…………………………………………………………………… Page 7

Safety Controls: ………………………………………………………………………………………………………. Page 7

Domestic Hot Water Connections (HACW only): …………………..…………………………………………… Page 8

SIZING AND DUCTWORK: ………………...…………………………………………………………………………………… PAGE 10

Heat Pump Sizing: ……………………………………………………………………………………………………. Page 10

Duct Systems - General: …………………………………………………………………………………………….. Page 10

Duct Systems - Grill Layout: ………………………………………………………………………………………… Page 10

Thermostat Location: ………………………………………………………………………………………………… Page 11

Plenum Heater (Optional): …………………………………………………………………………………………… Page 11

Condensate Drain: …………………………………………………………………………………………………….. Page 11

Duct Sizing Guide: ……………………………………………………………………………………………………. Page 13

GROUND WATER SYSTEM INFORMATION: ………………………………………………………………………………… PAGE 14

Plumbing the Heat Pump: ……………………………………………………………………………………………. Page 14

Pipe Insulation: ………………………………………………………………………………………………………… Page 14

Water Discharge Methods: …………………………………………………………………………………………… Page 14

GROUND LOOP SYSTEM INFORMATION: ………………………………………………………………………………….. PAGE 17

Circulator Pump Module: ……………………………………………………………………………………………. Page 17

Flushing & Purging the Ground Loop: ……………………………………………………………………………. Page 17

Adding Antifreeze Solution: ………………………………………………………………………………………… Page 18

Initial Pressurization: ………………………………………………………………………………………………… Page 18

Pipe Insulation: ……………………………………………………………………………………………………….. Page 18

STARTUP PROCEDURE: ………………………………………………………………………………………………………. Page 20

Pre-start Inspection: …………………………………………………………………………………………………. Page 20

Unit Startup: …………..………………………………………………………………………………………………. Page 21

Startup Record: ……………….………………………………………………………………………………………. Page 22

GENERAL MAINTENANCE: ……………...…………………….……………………………………………………………… PAGE 23

TROUBLESHOOTING GUIDE: ………………………………….……………………………………………………………… PAGE 24

Repair Procedures: …………………………………………………………………………………………………… Page 33

Refrigeration Diagrams: ……………………………………………………………………………………. Page 34

MODEL SPECIFIC INFORMATION: ……………….…..………………………………………………………………………. PAGE 36

Refrigerant Charge Chart: …………………………………………………………………………………………… Page 36

Standard Capacity Ratings: …………...……………………………………………………………………………. Page 36

Electrical Tables: ……………………………………………………………………………………………………… Page 43

Electrical Diagrams (230-1-60): ………..…………………………………………………………………………… Page 44

Case Details: ………………………...………………………………………………………………………………… Page 47

APPENDIX A: Control Board Specifications: ……………………………………………………………………………… PAGE 55

APPENDIX B: ECM Fan Airflow Tables: ……………………………………………………………………………………. PAGE 56

WARRANTY INFORMATION: ………………………………………………………………………………………………….. PAGE 60


Tables, Diagrams and Drawings

TABLES

Table 1 - Control Signal Description: …….………………………………………………………………..…….... Page 6

Table 2 - Airflow Selections: ………………………………………………………………………………………... Page 7

Table 3 - Control Board Fault Codes: ……..….…………………………………………………………………... Page 7

Table 4 - Heat Pump Size vs. Heated Area for Ground Loop Systems: …..………………………………... Page 11

Table 5 - Heat Pump Size vs. Heated Area for Ground Water Systems: ….………………………………... Page 11

Table 6 - Heat Pump Size vs. Hot Air Grills: …..………………………………….……………………………... Page 12

Table 7 - Plenum Heater Sizing: …..………………………………………………..……………………………... Page 12

Table 8 - Duct Sizing Guide: ……………………………………………………...………………………………... Page 14

Table 9 - Required Flow and Air Tank Sizing: …..……………………………………………….……………... Page 15

Table 10 - Antifreeze Percentages by Volume: ………………………………..………………………………... Page 19

Table 11 - Volume of Fluid per 100ft. Of Pipe: …..………………………………….…………………………... Page 19

Table 12 - Refrigerant Charge Chart: …..………………………..………………….….………………………... Page 36

Table 13 - Shipping Information: ………...………………………..………………….….………………………... Page 36

Table 14 - Standard Capacity Ratings - Ground Loop Heating 60Hz: …………..…………………………... Page 36

Table 15 - Standard Capacity Ratings - Ground Water Heating 60Hz: …………….………………………... Page 36

Table 16 - Standard Capacity Ratings - Ground Loop Cooling 60Hz: …….…….…………………………... Page 37

Table 17 - Standard Capacity Ratings - Ground Water Cooling 60Hz: …..…….…………………………... Page 37

Table 18 - Heat Pump Electrical Information (230-1-60): …..…………………….….………………………... Page 38




DIAGRAMS

Diagram A - Typical P/T (Pete’s) Plug & Thermometer Stem: …….……………………….…………..…….. Page 18

Diagram B - Typical Purge Cart: …………………………………………………………………………………… Page 18

Case Details - Left Hand Return (Size 25-45): ……………………………………………………………….….. Page 47

Case Details - Right Hand Return (Size 25-45): …………………………………………………………….…... Page 49

Case Details - Left Hand Return (Size 55-75): ……………………………………………………………….….. Page 51

Case Details - Right Hand Return (Size 55-75): ………………………………………………………………….. Page 53

DRAWINGS

000970PDG - Single Unit Connection to DHW Pre-Heat Tank (Brass FPT): ………….…………………….. Page 9

000822CDG - Typical Duct and Condensate Connections (Horizontal Case): ….…………………………. Page 12

000907CDG - Typical Ground Water Installation for Size 25-75 Heat Pumps (Brass FPT): …………….. Page 15

000619INF - Ground Water Disposal Methods: ………………………………………………………………… Page 16

000906CDG - Geo-Flo Circulator Pump Module Installation (Brass FPT): …….…………………………… Page 19

001207RCD - Modular R(H)-Series Refrigeration Circuit Diagram—Heating Mode: ……...……………… Page 34

001208RCD - Modular R(H)-Series Refrigeration Circuit Diagram—Cooling Mode: …….…..…………… Page 35

000683SCH - RH-**-HAC*-P-1T-*-*DE** Schematic Diagram: ……………………...…………..……………… Page 39

000684ELB - RH-**-HAC*-P-1T-*-*DEL* Electrical Box Diagram: ……………………..……………………… Page 44

000685ELB - RH-**-HAC*-P-1T-*-*DER* Electrical Box Diagram: ……………………..……………………… Page 45


Installation Information

UNIT DESCRIPTION

The RH-Series unit is a high efficiency two-stage geothermal heat pump with environmentally friendly R410a refrigerant.

Two-stage units offer a significant efficiency increase over single stage units when operating in the reduced capacity mode

(stage 1).

The RH-Series has a compact horizontal case design with corner mounts allowing it to be suspended from the ceiling if desired. The fan is mounted to an access panel and can easily be switched from straight through to end discharge configuration.

An electrically commutated (ECM) fan with several speed options is standard. The motor has a soft start function for improved efficiency and reduced wear.

The unit has several key features that are described in the specifications document for the particular heat pump. Please request a copy if desired or visit www.nordicghp.com

UNPACKING THE UNIT

When the heat pump reaches its destination it should be unpacked to determine if any damage has occurred during shipment. Any visible damage should be noted on the carrier's freight bill and a suitable claim filed at once.

The heat pump is well constructed and every effort has been made to ensure that it will arrive intact, however it is in the customer's best interest to examine the unit thoroughly when it arrives.

ELECTRICAL CONNECTIONS

The heat pump has a concentric 1.093” / 0.875” knockout for power supply connection to the electrical box, as well as one for connection to the circulator pump module for ground loop applications. There are two 1/2” openings with plastic grommets (grommet hole is 3/8”) in the upper section of the electrical box, one for the thermostat connections, and one for the optional plenum heater connections.

A schematic diagram and electrical box layout diagram

(ELB) can be found inside the electrical box cover of the unit as well as in the Model Specific section of this manual. The Electrical Tables in the Model Specific section and the ELB diagram contain information about the size of wire for the connections, as well as the recommended breaker size. A properly qualified electrician should be retained to make the connections to the heat pump and associated controls. The connections to the heat pump MUST CONFORM TO LOCAL CODES.

CIRCULATOR PUMP MODULE WIRING

(GROUND LOOP ONLY)

The heat pump has provisions for connecting the circulator pump module so that the pumps will be turned on whenever the compressor operates. Connect the circulator pump module to the appropriate two terminals of the terminal strip marked

OUTDOOR CIRCULATORS in the heat pump, as per the voltage of the circulator pump module. Ensure that the total current draw does not exceed the value indicated on the label in the heat pump electrical box. Refer to the electrical box drawing on the electrical box cover for more information.

THERMOSTAT REQUIREMENTS

The RH-Series unit requires a three-stage heating and two stage cooling thermostat for proper operation. The stages are

S1 = Stage 1 compressor, S2 = Stage 2 compressor and S3 = electric auxiliary (heating only). One can be purchased with the unit, or other thermostats with the same number of stages can be used. The electrical box diagram on the electrical box cover provides a description of the signal connections as in TABLE 1 .

OPTIMUM PLACEMENT

For liquid to air units, to achieve the greatest efficiency, the heat pump should be centrally located in the home with respect to the conditioned space. This design provides the utmost in economy and comfort and usually can be accomplished in harmony with the design of the home. A heating system cannot be expected to produce an even warmth throughout the household when it is located at one end of the structure and the warm air is transmitted with uninsulated metal ductwork.

If possible the access panels should remain clear of obstruction for a distance of two feet to facilitate servicing and general maintenance. DO NOT STACK UNITS ON TOP OF

EACH OTHER. The cases are not designed to hold the weight of another unit. Stacking should only be done with a proper rack system able to hold a minimum of 2x the weight of the unit.

Raising the heat pump off the floor a few inches is generally a good practice and also helps prevent rusting of the bottom panel of the unit. We recommend that the heat pump be placed on a piece of 2'' thick styrofoam. The styrofoam will smooth out any irregularities in the cement floor and deaden any compressor noise emitted from the bottom of the cabinet.

If the unit is to be suspended ensure that the mounting system can hold at least 2 times the weight of the unit for safety reasons.

NORDIC® heat pumps have an air-filter rack which can be installed with the removable end (where the filter is inserted) on either side to facilitate changing the filter.

TABLE 1 - Control Signal Description

Signal

G

Description

Fan low speed (for air circulation)

Y

1

R

H

Heat Pump Stage 1

L

W

2

/E

Fault (24VAC when fault condition)

Heat Pump Stage 3 (auxiliary heat) /

Emergency Heat

O/B/W

1

Cooling Mode (reversing valve)

Heat Pump Stage 2 Y

2

AR

1

AR

2

I

Airflow Reduction*

Plenum Heater dry contact

1 Plenum Heater dry contact

* Connect AR

1

to AR

2

with a dry contact to reduce the airflow by 15%. Refer to the Fan Motor sub-section for more information.


NOTE: Some three phase units are not available in two-stage at the present time. The Y2 signal is not used for these units. secondary side for circuit protection. Should the breaker trip, locate and correct the problem and then reset the breaker by pressing in on it.

FAN MOTOR

The unit is equipped with a direct drive ECM fan motor for maximum efficiency. The motor features a soft start which further improves efficiency by eliminating inrush current and provides a smooth, quiet ramp up to speed . The motor will maintain the programmed air flow up to the maximum external static value. Refer to the APPENDIX B: ECM Fan Airflow Tables.

The air flow can be set to four different levels by changing the position on the Air Flow board located in the electrical box.

The four levels are indicated in TABLE 2 . The actual air flow values can be found in APPENDIX B .

TABLE 2 - Airflow Selections

Position Airflow

SAFETY CONTROLS

The heat pump has two built in safety controls which are designed to protect the unit from situations which could damage it should the operation of the refrigeration circuit fall outside the allowable operating range.

A. Low Pressure Control

The low pressure control monitors the compressor suction pressure and will shut the compressor down if the refrigerant evaporating pressure becomes too low, risking the danger of freezing conditions in the evaporator.

There are (3) main reasons why this control would activate in response to the operating conditions of the unit while operating in heating mode:

LOW -6%

MED Nominal

HIGH +6%

1. Low or no Outdoor loop flow.

2. Low Outdoor loop entering liquid temperature.

3. Dirty or fouled Outdoor loop heat exchanger.

MAX +12%

Units are shipped with the MED position selected for nominal air flow. The air flow can be further reduced by 15% by

B. High Pressure Control

The high pressure safety control monitors the compressor discharge pressure and will shut the compressor down if the condensing pressure becomes too high. making a dry contact across AR

1

and AR

2

on the terminal strip.

This can be used for applications that have multiple zones, or retrofits with undersized ductwork, to help reduce air flow noise in the ductwork. It is recommended that airflow reduction only be used with the High or Max air flow setting. Care should be taken to ensure that the unit does not trip a safety control in heating or cooling mode if the 15% reduction is used in conjunction with the MED or LOW air flow setting.

There are (3) main reasons why this control would activate in response to the operating conditions of the unit while operating in heating mode:

1. Low or no airflow.

2. High return air temperature.

3. Dirty air coil due to poor filter maintenance.

FAN RETURN ORIENTATION

The RH-Series heat pump can be ordered as a left or right hand return from the factory. This must be specified at time of order as the physical construction of the two configurations is different. Refer to the specification documents for more details.

The unit contains a control board that monitors the safety controls and operates the compressor accordingly. Refer to

APPENDIX A for control board specifications. The low pressure control is connected to LP1 and LP2. The high pressure control is connected to HP1 and HP2.

The control board also has provisions for a flow switch.

FAN OUTLET ORIENTATION

The RH-Series heat pumps have a field configurable fan.

It’s default location from the factory is in the end of the unit, providing a “ninety” in the airflow. It can easily be placed in the side of the unit for straight through airflow.

To switch the location of the fan outlet follow these simple steps:

1. Turn the power of to the unit.

2. Remove the screw that holds the side access panel in place and remove the access panel by pulling up on the handle and then outward from the bottom.

3. Repeat for the access panel with the fan mounted in it.

Ensure the wire harnesses are free while removing the fan.

4. Disconnect the two wire harnesses and ground wire

The flow switch is unused from the factory and a jumper wire is placed across the FLOW SWITCH terminals. If a flow switch is desired, the jumper can be removed and the two leads from the flow switch can be connected to the FLOW SWITCH terminals on the safety board. The flow switch is ignored for 30 seconds on compressor startup to allow time for flow to be established.

The high and low pressure controls are monitored at all times.

The compressor will not be able to start if either of them has a fault.

The control board has an on-board LED and a FAULT pin with a 24VAC output. An external indicator or relay can be connected across the FAULT pin and ground if external signaling is desired. Should a fault occur, the LED will flash the code of the fault condition while the safety control in question is open.

The codes are shown in TABLE 3.

The control board will lock out the compressor for five minutes when a fault occurs. Three from the fan motor.

5. Place the fan in front of the new location and reconnect both harnesses and the ground wire.

6. Install the fan and secure with the screw.

7. Install the remaining access panel and secure with the remaining screw.

CONTROL TRANSFORMER

The low voltage controls are powered by a 75VA class II transformer. The transformer has a resettable breaker on the retries per fault condition are allowed within a 60 minute period.

If the fault condition occurs a fourth time the control board will permanently lock out the compressor and energize the FAULT pin. This can only be reset by powering down the unit. The

LED will flash the fault code until the unit is reset.

If the control board enters permanent lockout mode there is a serious problem with the system and it must be rectified if the unit is to maintain good service.


TABLE 3 - Control Board Fault Codes

Fault Code

High Pressure 1

Low Pressure 2

Flow 3

!

WARNING: REPEATED RESETS OF A LOW PRES-

SURE LOCKOUT COULD CAUSE THE HEAT EX-

CHANGER TO FREEZE AND RUPTURE, DESTROY-

ING THE HEAT PUMP AND VOIDING THE WAR-

RANTY.

DOMESTIC HOT WATER

CONNECTIONS (HACW ONLY)

A typical piping diagram for a pre-heat tank (two-tank) configuration can be found in drawing 000970PDG at the end of this section. Be sure to note the position of the check valve and the direction of water flow. Other configurations are possible, and there may be multiple units tied together in larger buildings.

WARNING: USE ONLY COPPER LINES TO

!

CONNECT THE DESUPERHEATER. TEMPERA-

TURES COULD REACH 200F SHOULD THE DHW

CUTOUT SWITCH FAIL, POTENTIALLY RUPTURING

PEX PIPING.

Ensure the tank is filled with water and under pressure before activating the heat pump. Slightly loosen the boiler drain on the DHW Out pipe to allow air to escape from the system before the unit is started. This step will make certain that the domestic hot water circulator in the unit is flooded with water when it is started.

CAUTION: the domestic hot water pump is water

! lubricated; damage will occur to the pump if it is

run dry for even a short period of time.

Connect the brown wire with the blue insulated terminal to

L1 of the compressor contactor. Ensure the power is off

when connecting the wire.

The DHW loop may have to be purged of air several times before good circulation is obtained. A temperature difference between the DHW In and DHW Out can be felt by hand when the circulator pump is operating properly.

For the pre-heat tank setup, the final tank should be set to

140°F(60°C), unless local code requires a higher setting.

The pre-heat tank does not require electric elements. This setup takes full advantage of the desuperheater as it is the sole heat provider to the pre-heat tank. The desuperheater remains active during the compressor runtime until the pre-heat tank has been completely heated by the desuperheater alone. This setup is more energy efficient than a single tank setup.

CAUTION: If two (2) shut-off valves are located on the domestic hot water ines as shown in the diagram, a pressure relief valve must be installed to prevent possible damage to the domestic hot water circulator pump should both valves be closed.



Sizing and Ductwork

HEAT PUMP SIZING

TABLE 4 depicts a rough guideline as to the size of home each heat pump size can handle for ground loop installations.

TABLE 4 - Heat Pump Size vs. Heated Area

for a Ground Loop System

Once the total heat loss has been calculated, the unit can be sized using the performance tables (from the specifications document) in conjunction with the minimum expected entering liquid temperature of the ground loop (well water temperature for ground water system). The heat pump output must be able to match the total heat loss at the selected entering water temperature in order to provide a comfortable environment with minimal auxiliary heat. Model Size (tons) Sq.ft. Sq.m.

DUCT SYSTEMS - GENERAL

45 3 1,400

55 4 2,000

65 5 2,600

75 6 3,100 is normally 95º -105ºF (35-40ºC) , much cooler than that of a

80 6 3,500 conventional warm air furnace. To compensate for this, larger volumes of lower temperature air must be moved and

TABLE 5 depicts a rough guideline as to the size a home consequently duct sizing must be able to accommodate the each heat pump size can handle for ground water installations. greater air flow without creating a high static pressure or high velocity at the floor diffusers.

TABLE 5 - Heat Pump Size vs. Heated Area

for a Ground Water System A duct system capable of supplying the required air flow is of

Model Size (tons) Sq.ft. Sq.m. utmost importance. Maritime Geothermal Ltd. recommends that the static pressure be kept below 0.2 inches of water total. In

25 2 1,000

45 3 1,800

55 4 2,500 oil-fired furnace. Refer to TABLE 8 at the end of this section.

230

65 5 3,200

75 6 3,800

80 6 4,200

3. The main hot air trunks should be at least 75% of the square

surface area of leads being fed at any given point.

4. Return air grills should have a minimum of the same total

THE TABLES ABOVE ARE FOR INFORMATION ONLY,

THEY SHOULD NOT BE USED TO SELECT A UNIT SIZE.

They simply show on average what size unit is required for a

square surface area as the total of the supply grills.

5. The square surface area of the return trunks should equal

the square surface area of the grills being handled at any

given point along the trunk. typical two-level home (main level and below grade basement) with R-20 walls, R-40 ceiling and average size and number of windows. The Heated Area is the area of the main level, The tables account for a basement the same size as the heated

It is VERY IMPORTANT that all turns in both the supply trunks and the return trunks be made with TURNING RADII . Air acts like a fluid and pressure drop is increased when air is area.

MARITME GEOTHERMAL LTD. HIGHLY RECOMMENDS

THAT A PROPER HEAT LOSS/GAIN ANALYSIS BE PERforced to change direction rapidly around a sharp or irregular corner.

It is recommended that flexible collars be used to connect the

FORMEDE BY A PROFESSIONAL INSTALLER WITH CSA

APPROVED SOFTWARE BEFORE SELECTING THE SIZE OF

UNIT REQUIRED FOR THE APPLICATION. For heating dominant areas, we recommend sizing the unit to 100% of main trunks to the heat pump. This helps prevent any vibrations from travelling down the ductwork. If a plenum heater is installed, the collar should be at least 12” away from the heater the heating design load for maximum long term efficiency with minimal supplementary heat. The unit should be installed as per CSA 448.2-02. For ground loop applications, the ground exchanger should be designed using suitable elements.

The first 5-10 feet of the main supply trunks should be insulated with acoustical duct insulation to further inhibit any noise software with a multi-year analysis.

There are many factors to consider when sizing the heat from the unit from travelling down the ductwork. If a plenum heater is installed, insulation should not be placed within 12” of the heater elements. pump. Some of these factors include the number of levels, the size of the windows, the orientation of the home, attached garage, bonus rooms, walk-in basement, coldest outdoor temperature, etc. The heat loss program will take all of these factors

Drawing 000822CDG shows a typical installation. into consideration in its calculations. An undersized installation will require not be as efficient and will required expensive supplemental heat to maintain a comfortable temperature in the home, and the cost savings of having a geothermal heat pump are greatly reduced.


DUCT SYSTEMS - GRILL LAYOUT

Most forced air heating systems in homes have the floor grills placed around the perimeter of the room to be heated. Supply grills should be placed under a window when possible to help prevent condensation on the window. As mentioned in the previous sub-section, supply grill leads should be 6'' in diameter (28 sq.in. each) to allow 100cfm of air flow.

In a typical new construction, there should be one supply grill for every 100sq.ft. of area in the room. When rooms require more than one grill, they should be placed in a manner that promotes even heat distribution, such as one at each end of the room. It is always a good idea to place a damper in each grill supply or place adjustable grills so that any imbalances in the heat distribution can be corrected.

The total number of supply grills available is based on the heat pump nominal airflow. TABLE 6 shows the number of grills available per heat pump size.

TABLE 6 - Heat Pump Size vs. Hot Air Grills

Model Size (tons) # of Grills (@100cfm)

25 2

45 3

55 4

65 5

75 6

80 6

8

12

15

29

21

24

Return grills should be mounted on the floor. At minimum they should be the same size as the supply grill, it is highly recommended that they be 25% to 50% larger than the total

supply. They should be placed opposite the supply grills when possible to ensure distribution across the room. For rooms requiring more than one supply grill, it may be possible to use one larger return grill if it can be centrally positioned opposite of the supply grills, however it is preferred to have one return for each supply to maximize heat distribution across the room.

THERMOSTAT LOCATION

Most homes are a single zone with one thermostat. The thermostat should be centrally located within the home, typically on the main floor. It should be placed away from any supply grills, and should not be positioned directly above a return grill. Most installations have the thermostat located in a hallway, or in the inner wall of the living room. It should be noted that most homes do not have any supply ducts in the hallway. This can lead to a temperature lag at the thermostat if there is very little air movement in the hallway, causing the home to be warmer than indicated by the thermostat.

PLENUM HEATER (OPTIONAL)

For installations that do not already have a backup heat source such as electric baseboard, wood stove, propane etc, it is recommended that a plenum heater be installed. This provides two functions.

The first function of the plenum heater is to act as an auxiliary heat source. As such it will provide additional heat on extremely cold days if the heat pump is unable to bring the home temperature up quickly enough, eliminating any discomfort to the homeowner.

The second function of the plenum heater is to provide emergency heat should a problem occur that causes the heat pump to be locked out. This can be engaged by setting the thermostat to emergency heat, allowing the plenum heater to function while preventing the heat pump from operating. Should the heat pump fail while the home is vacant, the auxiliary function of the thermostat will maintain the temperature setting of the thermostat.

The plenum heater is powered separately from the heat pump. Only two control wires are needed to connect the plenum heater to the heat pump. Refer to the label on the plenum heater or the electrical box diagram on the inside of the electrical box cover of the unit for details on the connections.

The plenum heater should be mounted in the supply duct in a manner that allows all of the airflow to pass through it to prevent any hot spots in the heater elements.

TABLE 7 shows the recommended size plenum heater, as well as the wire size and breaker size needed to provide power to the plenum heater.

TABLE 7 - Plenum Heater Sizing

Heat Pump Plenum Heater (230-1-60)

Model

Size

(Tons)

Size

(kW)

Current

(A)

Breaker

(A)

Wire

Size

25 2 5 21 40 #10

45 3 10 42 60 #6

55 4 15 62 100 #3

65 5 20 84 125 #3

75 6 20 84 125 #3

80 6 20 84 125 #3

CONDENSATE DRAIN

The unit comes equipped with a 3/4” PVC socket fitting

(female) labeled “Condensate Drain”. This drain allows the condensate which forms during the air-conditioning cycle to be removed from the unit. The drain should be connected as per local codes. During high humidity weather, there could be as much as 25 gallons of water formed per day.

Care should be taken in the spring to ensure that this pipe is not plugged with dust that has collected during the winter causing the condensate to overflow into the bottom of the heat pump and onto the floor. The condensate drain must be externally trapped and proper venting is required external to the heat pump as well. Refer to local codes to ensure the installation is done properly.

Drawing 000822CDG shows a typical installation.



380

452

452

531

616

616

707

201

254

254

314

314

380

707

804

804

908

908

6500

7250

7800

8500

9200

9800

10900

1450

1750

2000

2250

2600

2900

3400

3600

4300

5250

6125

TABLE 8 - Duct Sizing Guide

(external static of 0.20”H2O)

Airflow

(CFM)

37

Minimum

Duct Area

(sq.in)

Diameter

(in)

20 5

Rectangular Equivalents (in)

2.25 x 10 3 x 8 3.5 x 6 4 x 5.5 5 x 5

Return Air

Diameter

(in)

Airflow

(L/s)

5 17

63

100

20

28

5

6

2.25 x 10 3 x 8

3.25 x 10 4 x 8

3.5 x 6 4 x 5.5 5 x 5

5 x 6 5.5 x 5.5 6 x 6

6

7

30

47

152

212

226

277

304

393

411

655

680

995

1325

113

154

154

201

38

50

50

64

64

79

113

7

8

12

12

14

8

9

9

10

14

16

3.25 x 14 4 x 11

4 x 15 5 x 12

4 x 15

5 x 15

5 x 15

6 x 15

7 x 18

7 x 18

8 x 22

8 x 22

8 x 30

5 x 12

6 x 12

6 x 12

7 x 13

8 x 16

8 x 16

9 x 19

5 x 8.5

6 x 10

6 x 10

7 x 10

7 x 10

8 x 11

6 x 7 6.5 x 6.5

7 x 8 8 x 8

7 x 8 8 x 8

8 x 9 8.5 x 8.5

8 x 9 8.5 x 8.5

9 x 10 9.5 x 9.5

9 x 14

9 x 14

10 x 12

10 x 12

11 x 11

11 x 11

10 x 17 11 x 15 12 x 14 13 x 13

9 x 19 10 x 17 11 x 15 12 x 14 13 x 13

10 x 22 12 x 18 14 x 16 15 x 15

12

14

14

10

10

12

12

16

18

8

9

309

321

470

625

72

100

107

131

143

185

194

32

32

34

34

28

30

30

24

26

28

20

22

22

24

16

18

18

20

8 x 30 10 x 22 12 x 18 14 x 16 15 x 15

8 x 40

8 x 40

10 x 30

10 x 30

12 x 24

12 x 24

14 x 20

14 x 20

16 x 17 16.5 x 16.5

16 x 17 16.5 x 16.5

10 x 38 12 x 30 14 x 26 16 x 22 18 x 19 18.5 x 18.5

10 x 38 12 x 30 14 x 26 16 x 22 18 x 19 18.5 x 18.5

12 x 36 14 x 30 16 x 26 18 x 23 20 x 20

12 x 36 14 x 30 16 x 26 18 x 23 20 x 20

14 x 38 16 x 32 18 x 28 20 x 25 22 x 22

14 x 38 16 x 32 18 x 28 20 x 25 22 x 22

16 x 38 18 x 32 20 x 30 22 x 24 24 x 24

18 x 38 20 x 34 22 x 30 24 x 28 26 x 26

18 x 38 20 x 34 22 x 30 24 x 28 26 x 26

20 x 40 22 x 38 24 x 32 26 x 30 28 x 28

20 x 40 22 x 38 24 x 32 26 x 30 28 x 28

22 x 40 24 x 38 26 x 34 28 x 32 30 x 30

22 x 40 24 x 38 26 x 34 28 x 32 30 x 30

24 x 42 25 x 40 26 x 38 28 x 34 30 x 32 31 x 31

24 x 42 25 x 40 26 x 38 28 x 34 30 x 32 31 x 31

28 x 40 30 x 36 32 x 34 33 x 33

30 x 42 32 x 38 34 x 36 35 x 35

30 x 45 34 x 40 36 x 38 37 x 37

20 684

826 20

22 944

22 1062

24 1227

24 1369

26 1605

26 1699

28 2029

30 2478

32 2891

34 3068

34 3422

36 3681

36 4012

38 4342

38 4625

40 5144


Ground Water System Information

GENERAL REQUIREMENTS

1. The temperature of the well water should be a minimum of 39°F (4°C), and should normally be 45+°F (7°C)

2. The well system must be able to supply the required water flow as listed under the Total Flow column in

TABLE 9 .

TABLE 9 - Required Flow and Air Tank Sizing

Heat

Pump

Model

Size

Heat

Pump

Flow*

IGPM

(USGPM)

Home

Flow

IGPM

(USGPM)

Total

Flow

IGPM

(USGPM)

Minimum Air

Bladder

Tank**

IGal

(USgal)

25

45

55

65

75

80

6 (7.2)

8 (9.6)

3 (3.6)

3 (3.6)

10 (12.0) 3 (3.6)

12 (14.4) 3 (3.6)

14 (16.8) 3 (3.6)

14 (16.8) 3 (3.6)

9 (10.8)

11(13.2)

13(15.6)

15(18.0)

17(20.4)

17(20.4)

18(22)

22(26)

26(31)

30(36)

34(41)

34(41)

* These are minimum water requirements based on an entering water temperature of 46° F.

**Based on two-minute well pump run time. Use next size larger tank if there is not a match for the value indicated.

A larger tank may be used if a longer run time is desired.

PLUMBING THE HEAT PUMP

Plumbing lines, both supply and discharge, must be of adequate size to handle the water flow necessary for the heat pump. A 1” copper or plastic line should be run to the Outdoor

IN (Supply IN) pipe of the heat pump. Similarly, a 1”' line should be run from the Outdoor OUT (Supply Out) pipe to the method of disposal. P/T plugs should be installed at each port. See

Diagram A in the Ground Loop section for a description of P/T plugs. The water valve should be installed in the discharge line.

Refer to drawing 000907CDG at the end of this section for the recommended setup. Placing the water valve in the discharge line ensures that the heat exchanger inside the heat pump remains full of water when the unit is not running. Unions or some other form of disconnect should be used so that the coaxial heat exchanger may be accessed should it required cleaning.

The heat pump has an electrical connector for the water valve just inside the case. After the water valve is installed, run the valve harness into the case through the hole provided. Remove the jumper plug from the Valve Connector and connect the harness in its place.

Ideally there will be water flow available in excess of the requirement of the heat pump. In such a situation the proper pump can be selected to maintain a pressure of 30 to 40 psig. on the lines when the heat pump is operating. However in some cases a well can supply a heat pump only if the minimum requirement for water is used.

000821MAN-01

Water flow to the heat pump can be controlled very accurately by the installation of a reverse action refrigeration pressure valve in the discharge line of the unit.

Another more common method of regulating the flow is by the use of a DOLE Valve. This valve will automatically control the amount of water flowing through it by varying the diameter of a flexible rubber orifice through which the water passes. This minimizes the water usage of the unit and also prevents excessively low discharge pressure when in cooling mode. Dole valves can be noisy, it is recommended that they be installed outside if possible.

Optionally a water flow meter can be installed in the discharge line so that the exact amount of water flowing can be determined at a glance. It should be placed between the Outdoor OUT (Supply OUT) pipe of the heat pump and the water valve.

With Proper flow, there should be 5-7°F (3-4°C) delta T between the IN and OUT water temperatures of the heat pump when operating in the heating mode.

All water line valves on both the supply and discharge lines should be either BALL or GATE valves. GLOBE valves have a higher pressure drop, meaning more pumping power to maintain the required flow to the heat pump.

PIPE INSULATION

All ground water piping to and from the Outdoor Loop ports on the heat pump should be insulated with 3/8” closed cell pipe insulation, to prevent condensation and dripping onto floors or walls.

WATER DISCHARGE METHODS

Water disposal methods vary from area to area. However, some consideration should be made to prevent the cooled discharge water from immediately coming in contact with the supply source. Attempting to return the water to the source well will eventually cool the water so much that the heat pump will shut off on its low pressure safety control.

Acceptable methods for disposing of the waste water are listed below. The waste water is clean, the heat pump has no other effect than reducing the temperature of the water. Refer to the Ground Water Disposal methods diagram for typical disposal method diagrams.

•

Second well (return well)

•

Percolation (Drain, ditch, leaching field)

•

Pond, river or stream.

ENSURE SELECTED METHOD CONFORMS TO LOCAL CODES.

Page 14 ISSUE 02: 08 OCT 2010

A return well should be a minimum of 80 ft. from the supply well for residential applications. The water returned to the well will not necessarily be pumped into the same aquifer, depending on underground conditions. The return well must be able to supply at least the same quantity of water as the amount you wish to recharge into it. If the static level (level when not being pumped) of a well is high (10 to 20 ft. from the surface) it may be necessary to place a well cap on the well to keep the return water from flowing out the top of the well. This cap is commonly required since a certain amount of pressure is needed to force the return water back down the well if the static level is high.

Water discharged by percolation will generally soak into the ground within a distance of 50 to 100 ft. If suitable care is taken to ensure that the drain pipe runs downhill and the end of the pipe is protected by a bale of hay or spruce bows etc. the end of the pipe will not freeze as the pipe will empty out when the heat pump shuts off and the water valve closes.

When snow comes it will usually cover the entire process much like a small spring. It is recommended that the pipe be below the frost line when possible for maximum freeze protection.

When discharging into a river or stream, or above the surface of a pond, the same guidelines should be followed as described in the paragraph above for the percolation method.

When discharging the waste water below the surface of a pond, the discharge pipe should be placed below the frost line to prevent the pipe from freezing. As opposed to the percolation method, water will remain in the end of the pipe. It is recommended that the surface of the pond be lower than the installation location of the heat pump where practical. This reduces the back pressure generated by the weight of the water in the



Ground Loop System Information

Once the ground loop has been pressure tested and the header pipes have been connected to the circulator pump module, the heat pump can be connected to the circulator pump module.

CIRCULATOR PUMP MODULE

Maritime Geothermal Ltd. has compact pump modules with built in three way valves to facilitate filling and purging the ground loop. Refer to drawing 000906CDG at the end of this

section. Alternatively, Grundfoss® Model UPS 26-99 or Taco®

Model 0011 pumps or other brands with similar pumping capability may be used. The single pump module will typically handle systems up to 3 tons (model sizes 25 - 45); the two pump module will typically handle 4 to 6 ton systems (model sizes 55, 65, 75). This is based on a typical parallel system with one circuit per ton.

Maritime Geothermal recommends calculating the total pressure drop of the ground loop (including headers, indoor piping and heat pump exchanger drop) based on the antifreeze type and concentration at the desired minimum loop temperature. A pump module that can deliver the flow required for the unit at the calculated total pressure drop should be selected.

Refer to the Model Specific Information section for unit flow requirements.

Loop pressure drops can be calculated using software such as those mentioned in the Horizontal Ground loops section, or can be calculated in a spreadsheet using the pipe manufacturer’s pressure drop tables for pipe diameter and fittings.

The circulator pump module must be connected to the heat pump Outdoor Loop ports with a lineset suitable for the flow required with minimum pressure drop. 1” rubber or plastic lines should be used. The installation of P/T plugs (pressure / temperature, pronounced “Pete’s plugs” ) is recommended on both the entering and leaving lines at the heat pump (see

Diagram A).

DIAGRAM A - Typical P/T (Pete’s) Plug

& Thermometer Stems

The P/T plug will allow the installer or homeowner to check water flow through the loop by measuring the pressure difference through the heat exchanger and comparing it to that listed in the Model Specific Information section , or the specifications document . Optional fittings with P/T ports are available for the circulator pump modules sold by Maritime

Geothermal Ltd..

FLUSHING & PURGING THE GROUND

LOOP

Once the groundloop has been installed and all connections are completed between the heat pump, circulator pump module and ground loop, the entire ground loop system should be

pressure tested with air to 100 PSIG to make sure there are no leaks on any of the inside fittings. Soap all joints and observe that the pressure remains constant for 1 hour.

When satisfied that all connections are leak free, release the air pressure and connect a purge cart (see Diagram B ) to the flushing access ports at the pump module (refer to drawing

000906CDG).

A temporary flushing system can alternately be constructed using a 45 gal. barrel and a pump with sufficient volume and head capability to circulate fluid at a velocity of at

least 2 ft./min. through all parts of the loop.

DIAGRAM B - Typical Purge Cart

ISSUE 02: 08 OCT 2010

Adjust the circulator pump module valves to connect the purge cart to the ground loop. Begin pumping water through the ground loop, ensuring that the intake of the pump stays submerged at all times by continuously adding water. Water flowing back from the return line should be directed below the water level in the barrel or flush tank to prevent air being mixed with the outgoing water.

Page 17 000821MAN-01

Once the lines have been filled and no more air bubbles are appearing in the line, adjust the circulator pump module valves to circulate water through the heat pump using the same technique as described above. When all air is removed reverse the flow of water through the lines by interchanging the flush cart lines and purge again. You will be able to visibly tell when all air is removed.

ADDING ANTIFREEZE SOLUTION

In most mid and northern areas of the US and in all of

Canada it is necessary to condition the loop fluid by the addition of some type of antifreeze solution so that it will not freeze during operation in the winter months. This antifreeze is required because the loop fluid will normally reach a low entering temperature of 28°F to 32°F (-2°C to 0°C) and refrigerant temperatures inside the heat pump’s heat exchanger may be as low as 20°F (11°C) cooler. See TABLE 10 for details of freeze protection provided by different concentrations.

TABLE 10 - Antifreeze Percentages

BY VOLUME

Protection to: 10°F 15°F 20°F 25°F

Methanol 25% 21% 16% 10%

Propylene Glycol 38% 30% 22% 15%

Protection to:

BY WEIGHT

10°F 15°F 20°F 25°F

Methanol 16.8% 13.6% 10% 6.3%

NOTE: Add enough antifreeze to allow for a temperature

20°F (11°C) lower than the expected lowest loop fluid temperature entering the heat pump.

Although many different antifreeze solutions have been employed in geothermal systems, the alcohols such as methanol or ethanol have the most desirable characteristics for groundloop applications. The overall heat transfer characteristics of these fluids remain high although care must be taken when handling pure alcohols since they are extremely flammable. Once mixed in a typical 25% by volume ratio with water the solution is not flammable. In situations where alcohols are not allowed as a loop fluid due to local regulations then propylene glycol is a non-toxic alternative which can be substituted . Propylene glycol should only be used in cases where alcohols are not permitted since the heat transfer characteristics are less desirable and it becomes more viscous at low temperatures, increasing pumping power.

The volume of fluid that your loop system holds can be closely estimated by totaling the number of ft. of each size pipe in the system and referencing TABLE 11 the for approximate volume per 100 ft.

When the volume of the loop has been calculated and the appropriate amount of antifreeze is ready for addition by referencing TABLE 10 , drain the equivalent amount of water from the flush cart or mixing barrel and replace it with the antifreeze.

When using alcohols, be sure to inject below the water

line to reduce initial volatility of the pure antifreeze. If the loop is large it may be necessary to refill the tank with antifreeze

000821MAN-01 Page 18 several times to get all the antifreeze into the loop. Pump the loop for 5 to 10 minutes longer to ensure the remaining fluid has been well mixed.

TABLE 11 - Volume of fluid per 100 ft. of pipe

Volume /100ft.

Type of Pipe Diameter Igal USgal L

Rubber Hose

Polyethylene

Heat Exchanger

1” 3.2

3/4” IPS SDR11

1” IPS SDR11

1-1/4” IPS SDR11 6.7

1-1/2” IPS SDR11 9.1

2” IPS SDR11

2.3

3.7

2.8

4.5

8.0

10.9

10.6

17.0

30.3

41.3

15.0 18.0 68.1

Other Item Volumes

Average 1.2

3.9 14.8

1.5 5.7

Purge Cart Tank See cart manual TBD

INITIAL PRESSURIZATION

At this point open all valves in the flow circuit and slowly close off the supply and return flush cart valves in a manner that leaves about 20-30 psig. on the system. If an air bladder expansion tank is used it should be charged to the above pressure before actual water pressure is put on the system .

Systems without an expansion tank will experience greater fluctuations in pressure between the heating and cooling seasons, causing pressure gauges to have different values as the loop temperature changes. This fluctuation is normal since expansion and contraction of the loop fluid must be handled by the elasticity of the plastic loop.

•

Pressurize the loop to a static pressure of 45 psig. when installing a system in the fall going into the heating season.

•

Pressurize the loop to a static pressure of 25 psig. when installing a system in the spring or summer going into the cooling season.

After operating the heat pump for a period of time, any residual air in the system should be bled off and the static pressure should be verified and adjusted if necessary. Add additional water / antifreeze mix with the purge cart to bring the pressure back to the original setting if required.

PIPE INSULATION

All ground loop piping inside the structure (between the structure entry point and the heat pump) should be insulated with 3/8” thick closed cell pipe insulation to prevent condensation and dripping onto floors or walls.

ISSUE 02: 08 OCT 2010


Startup Procedure

The following steps describe how to perform the startup procedure of the geothermal heat pump.

The RH-Series Two-Stage R410a 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.

Check the boxes or fill in the data as each step is completed. For data boxes, circle the appropriate units. Fill in the top section of all three copies, or one copy if photocopies can be made after the startup has been completed.

PRE-START INSPECTION

Ductwork:

1. Verify that all ductwork has been completed and is firmly attached to the unit. Verify that any dampers or diverters are

properly set for operation of the heat pump.

2. Verify that all registers are open and clear of any objects that would restrict the airflow.

3. Verify that a new air filter is installed and the cover is secured.

4. Verify the condensate drain is connected, properly vented and free of debris.

5. If a plenum heater has been installed, verify that it is securely fastened to the ductwork.

Outdoor Loop (Ground Loop):

1. Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the ground loop,

and that full flow is available to the heat pump.

2. Verify that the entire system has been flooded and all the air has been purged as much as possible. Further purging may

be required after the system has been operating for a while.

3. Verify that the loop contains the proper mix of antifreeze for the intended application. Record the type of antifreeze and the

mixture value on the startup sheet; circle % Vol. or % Weight.

4. Record the static loop pressure on the startup sheet.

Outdoor Loop (Ground Water):

1. Verify there are no leaks in the connections to the unit. Verify the water valve is installed and properly oriented in the

return line.

2. Verify that there is flow control in the return line.

Domestic Hot Water (if equipped):

1. Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the domestic

hot water tank.

2. Verify that the entire system has been flooded and all the air has been purged as much as possible. Further purging may

be required after the system has been operating for a while.

3. Verify that the brown wire with the insulated terminal is disconnected in the electrical box. Refer to the schematic diagram

for more information.

Electrical:

1. Ensure the power to the unit is off. Ensure the power to the plenum heater is off if equipped.

2. Verify all high voltage connections. Ensure that there are no stray wire strands, all connections are tight and the ground

wire is connected tightly to the ground connector for the heat pump and plenum heater.

3. Record the fuse / circuit breaker size and wire gauge for the heat pump. Record the fuse / circuit breaker size, wire gauge

and size of the plenum heater if installed.

4. Verify that the control connections to the thermostat and plenum heater (if installed) are properly connected and all control

signals are off, so that the unit will not start up when the power is turned on.

5. Ensure all access panels except the lower one that provides access to the electrical box are in place.


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. Remove the caps from the service ports and connect a refrigeration manifold set to the unit.

2. Turn the power on to the heat pump and set the thermostat to OFF. Set up the thermostat as per the instructions provided

with it so that it will function properly with the heat pump system (set for heat pump, not for heating and cooling). The O

signal should be set to active in cooling mode.

3. Measure the following voltages on the compressor contactor and record them on the startup sheet: L1-L2, L2-L3, L1-L3.

Heating Mode:

1. Set the thermostat to heating mode and adjust the setpoint to activate Stage 1 and Stage 2. The fan should slowly ramp up

to speed after the time delay of the thermostat expires (if applicable) and the compressor will start (allow 30-60 seconds for

the water valve to open for ground water systems)

2. Check the refrigeration gauges. The suction and discharge pressures will depend on the loop temperatures, but they should

be about 90-110PSIG and 260-360PSIG respectively for a typical start-up.

3. Monitoring the refrigeration gauges while the unit runs. Record the following after 10 minutes of runtime:

1. Suction pressure

2. Discharge pressure

3. Duct Return temperature (poke a small hole in the flex collar and insert probe in airstream)

4. Duct Supply temperature (poke a small hole in the flex collar and insert probe in airstream)

5. Duct Delta T (should be between 20-30°F, 11-17°C )

6. Outdoor Loop In (Supply In) temperature

7. Outdoor Loop Out (Supply Out) temperature

8. Outdoor Delta T (should be between 5-8°F, 3-4°C )

9. Outdoor flow (if available)

10. Compressor L1(C) current (black wire, place meter between electrical box and compressor)

4. Adjust the thermostat setpoint to the desired room temperature and let the unit run through a cycle. Record the setpoint

and the discharge pressure when the unit shuts off.

5. For units with a desuperheater, turn the power off to the unit. Connect the brown wire with the blue insulated terminal to the

compressor contactor as shown in the electrical box diagram. Turn the power to the unit on.

6. Remove the electrical cover from the plenum heater. Place a current clamp meter around one of the supply wires. Turn on

the power to the plenum heater. Adjust the thermostat setpoint to 85°F (29°C) . Verify that the current draw increase as

each stage is activated. (10kW has 2 stages, 15kW has 3 stages and 20kW has 4 stages).

7. Verify the DHW IN and DHW OUT temperatures (if applicable) by hand (caution: pipes get hot). If the DHW OUT line does

not become hotter than the DHW IN line the circulator is air locked. Bleed the air from the system and check the

temperature differential again to ensure there is flow from the circulator.

Cooling Mode:

1. Set the thermostat to cooling mode and adjust the setpoint to activate Stage 1 and Stage 2.

2. Monitoring the refrigeration gauges while the unit runs. Record the following after 10 minutes of runtime:

1. Suction pressure

2. Discharge pressure

3. Duct Return temperature

4. Duct Supply Out temperature

5. Duct Delta T

6. Outdoor Loop In (Supply In) temperature

7. Outdoor Loop Out (Supply Out) temperature

8. Outdoor Delta T

3. Adjust the thermostat setpoint to the desired room temperature if possible, otherwise set it just low enough to allow the unit

to run (ie 1°F (0.5°C) less than room temperature) and let the unit run through a cycle. Record the thermostat setpoint and

the suction pressure when the unit shuts off.

Final Inspection:

1. Turn the power off to the unit (and plenum heater if installed) and remove all test equipment.

2. Install the electrical box cover and the access panel on the heat pump. Install the service port caps securely to prevent

refrigerant loss. Install the electrical cover on the plenum heater if applicable.

3. Do a final check for leaks in the ground water / ground loop system and ensure the area is clean.

4. Turn the power on to the unit and the plenum heater if installed. Set the thermostat to the final settings.

Startup Record:

1. The startup personnel shall sign and date the Startup Record and have the startup witness or appropriate site personnel sign as well. The startup personnel shall leave the Startup Record with the homeowner, retain a copy for filing and send a copy to Maritime

Geothermal Ltd. for warranty registration.


Installation Site

City

Province

Country

Ductwork

Check boxes unless asked to record data. Circle data units.

PRE-START INSPECTION

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

Ground Loop

System

Startup Record —RH-Series Size 25-75 Two-Stage R410a

Startup Date Installer

Company

Model

Serial #

Ground Water

System

Domestic Hot

Water

Electrical

Plenum heater is securely fastened (if applicable)

All shut-off valve are open (full flow available)

Loop is full and purged of air

Antifreeze type

Antifreeze concentration

Loop static pressure

Water Valve installed in return line

Flow control installed in return line

All shut-off valves are open

Lines are full and purged

Desuperheater pump wire is disconnected

% Volume % Weight

PSI kPa

High voltage connections are correct and securely fastened

Circuit breaker (or fuse) size and wire gauge for Heat Pump

Circuit breaker (or fuse) size, wire gauge, and Plenum Heater size

A

A

Ga.

Ga. kW

Low voltage connections are correct and securely fastened

Preparation

STARTUP DATA

Voltage across L1 and L2, L1 and L3, L2 and L3

In

In

VAC

Out psig kPa

°F °C

Out °F °C

Heating Mode

(10 minutes)

Cooling Mode

(10 minutes)

Suction Pressure / Discharge Pressure

Duct Return, Duct Supply, and Delta T

Outdoor In (Supply In), Outdoor Out (Supply Out), and Delta T

Outdoor Flow

Compressor L1 (black wire) current

Domestic Hot Water functioning

Thermostat setpoint and discharge pressure at cycle end

Suction Pressure / Discharge Pressure

Duct Return, Indoor Out, and Delta T

Outdoor In (Supply In), Outdoor Out (Supply Out), and Delta T

Thermostat setpoint and suction pressure at cycle end

°F °C

In

In

Igpm USgpm L/s

A psig kPa

Out psig kPa

°F °C

Out °F °C

°F °C psig kPa

Date: Startup Personnel

Signature:

Witness/Site Signature:

A total of three copies are required, one for the site, one for the installer/startup and one to be sent to Maritime Geothermal Ltd.


General Maintenance

Air Filter

Item Interval

6 months

GENERAL MAINTENANCE SCHEDULE

Procedure

Inspect for dirt. Replace if necessary.

Contactor

Condensate Drain

1 year

1 year

Inspect for pitted or burned points. Replace if necessary.

Inspect for clogs. Remove and clean if necessary.

Heat exchanger As required* Clean as per HEAT EXHCANGER FLUSING PROCEDURE below.

*Generally not required for closed loop systems. Whenever system performance is reduced for open loop.

COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUNDWATER

STEP 1 Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger.

STEP 2 Blow out the heat exchanger into a clean 5 gallon bucket using compressed air.

STEP 3 If a purge cart is not available, use a 5 gallon plastic bucket, a circulator and some plastic piping to create a makeshift pump system. Connect a the inlet and outlet to the heat exchanger ports.*

STEP 4 Place 2 gallons of RYDLYME in the purge cart (or bucket). Circulate the fluid through the heat exchanger for at least 2 hours (3 recommended).

STEP 5 Disconnect the purge system dispose of the solution. RYDLYME is non-toxic and biodegradable and as such can be poured down a drain.

STEP 6 Connect fresh water and a drain to the heat exchanger ports and flush the exchanger for several minutes.

STEP 7 Return the plumbing to its original configuration and open the IN and OUT valves. Operate the system and check for improved performance.

*Depending on the plumbing, there should be either unions or boiler drains for to access the heat exchanger.

COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUND LOOP

STEP 1 Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position.

STEP 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.

STEP 3 Connect a purge cart to the pump module purge ports.

STEP 4 Place 2 gallons of RYDLYME in the purge cart. Circulate the fluid through the heat exchanger for at least 2 hours (3 recommended).

STEP 5 Disconnect the purge cart and dispose of the solution. RYDLYME is non-toxic and biodegradable and as such can be poured down a drain. Clean the purge cart thoroughly.

STEP 6 Connect fresh water and a drain to the pump module purge ports and flush the exchanger for several minutes.

STEP 7 Blow the heat exchanger out with compressed air as per STEP 2 and dump the water down a drain.

STEP 8 Connect the purge cart to the pump module purge ports. Re-fill and purge the heat exchanger with as per standard procedures (the anti-freeze from STEP 2 can be re-used).

STEP 9 Disconnect the purge cart and set the pump module valves back to the original positions.

STEP 10 Operate the system and check for improved performance.

*Depending on the plumbing, there should be either unions or boiler drains for to access the heat exchanger.


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 refrigeration circuit diagrams can be found at the end of the troubleshooting guide.

STEP 1: Verify that the display is present on the thermostat. If it is not, proceed to POWER SUPPLY TROUBLE

SHOOTING, otherwise proceed to STEP 2.

STEP 2: Remove the door and electrical box cover and check to see if there is a fault code on the control board. If

there is, record the fault code. Turn the power off, wait 10 seconds and turn the power back on. Set the

thermostat to call for heating or cooling depending on the season.

STEP 3: If a 24VAC signal does not appear across Y1 and C of the terminal strip within 6 minutes, proceed to the

THERMOSTAT TROUBLESHOOTING section, otherwise proceed to STEP 4.

STEP 4: If a fault code appears once a signal is present at Y1 and the compressor does not attempt to start,

proceed to the FAULT CODE TROUBLESHOOTING section, otherwise proceed to STEP 5.

STEP 5: If no fault codes appear and the compressor does not attempt to start, attempts to start but cannot, starts hard, or starts

but does not sound normal, proceed to the COMPRESSOR TROUBLESHOOTING section, otherwise proceed to

STEP 6.

STEP 6: If the compressor starts and sounds normal, this means the compressor is OK and the problem lies

elsewhere. Proceed to the OPERATION TROUBLESHOOTING section.

NOTE: To speed up the troubleshooting process, the Test Jumper on the safety board can be placed to the YES

position to change the anti-short cycle timer to 5 seconds. Be sure to set it back to NO when servicing is

complete.

Fault

No power to the heat pump

POWER SUPPLY TROUBLESHOOTING

Possible Cause

Disconnect switch open

(if installed)

Fuse blown /

Breaker Tripped.

Verification Recommended Action

Verify disconnect switch is in the

ON position.

Determine why the disconnect switch was opened, if all is OK close the switch.

At heat pump disconnect box, voltmeter shows 230VAC on the line side but not on the load side.

Reset breaker or replace fuse with proper size and type. (Timedelay type “D”)

No display on thermostat.

Transformer breaker tripped.

Faulty transformer

Faulty wiring between heat pump and thermostat.

Faulty Thermostat.

Breaker on transformer is sticking out.

Push breaker back in. If it trips again locate cause of short circuit and correct.

Transformer breaker is not tripped, 230VAC is present across L1 and L3 of the compressor contactor but 24VAC is not present across R

H

and C of the terminal strip.

Replace transformer.

24VAC is not present across C and R(R

H

) of the thermostat.

Correct the wiring.

24VAC is present across C and R

(R

H

) of the thermostat but thermostat has no display.

Replace thermostat.


THERMOSTAT TROUBLESHOOTING

Fault

No Y1 signal to heat pump

(after 6 minutes)

Possible Cause

Incorrect thermostat setup.

Faulty thermostat to heat pump wiring.

Faulty thermostat.


Thermostat does not indicate a call for heat. No 24VAC signal present across C and Stage 1 of the thermostat

Correct the setup.

24VAC signal present across Stage

1 and C of the thermostat but not present across Y1 and C of the terminal strip.

Correct or replace wiring

No 24VAC between Stage 1 and C of the thermostat when a call is indicated on the thermostat.

Replace thermostat.

Fault

Fault Code 1

(High Pressure

Control)

Fault Code 2

(Low Pressure

Control)

Fault Code 3

(Flow Switch)

FAULT CODE TROUBLESHOOTING

Possible Cause Verification Recommended Action

Faulty High Pressure Control (open).

* Must be a signal present on Y1 for this test.

*HP pressures must be at static levels.

Verify if there is 24VAC across HP1 on the control board and C of the terminal strip, as well as HP2 and C.

Replace high pressure control if voltage is present on HP1 but not on HP2.

Faulty control board.

24VAC is present across HP1 and

C1, and HP2 and C, but no voltage is present across CC on the control board and C.

Replace control board .

Faulty Low pressure control (open).

* Must be a signal present on Y1 for this test.

*HP pressures must be at static levels.

Verify if there is 24VAC across LP1 on the control board and C of the terminal strip, as well as LP2 and C.


Unit out of refrigerant.

Replace high pressure control if voltage is present on LP1 but not on LP1.

24VAC is present across LP1 and C, and LP2 and C, but no voltage is present across CC on the control board and C.


Check static refrigeration pressure of the unit for a very low value.

Locate the leak and repair it.

Spray nine, a sniffer and dye are common methods of locating a leak.

Flow switch jumper removed or faulty.

Flow switch faulty.

(Only if installed)

Verify jumper is in place between pins marked FLOW SWITCH.

Place a jumper if missing.


Verify 24VAC is present between each flow switch pin on the control board and the C terminal of the terminal strip while there is flow through the unit.

Replace flow switch if signal is not present at both terminals on the control board .

24VAC is present across each

FLOW SWITCH terminal and C, but not voltage is present across CC on the control board and C.



COMPRESSOR TROUBLESHOOTING

Fault

Compressor will

not start

Possible Cause

Faulty control board .

Faulty run capacitor.

(Single phase only)

Loose or faulty wiring.

Faulty compressor contactor.

Thermal overload on compressor tripped.


Measuring from C on the terminal strip, verify there is voltage at Y,

HP1, HP2, LP1, LP2, and both flow pins but no voltage present at CC.

Replace control board

Check value with capacitance meter. Replace if faulty.

Should match label on capacitor.

Compressor will hum while trying to start and then trip its overload.

.

Check all compressor wiring, including inside compressor electrical box.

Fix any loose connections. Replace any damaged wires.

Voltage on line side with contactor held closed, but no voltage on one or both terminals on the load side.

Points pitted or burned.

Or, 24VAC across coil but contactor will not engage.

Replace contactor.

Ohmmeter shows reading when placed across R and S terminals

Proceed to Operation Troubleshooting to determine the cause and infinity between C & R or C & S. of the thermal overload trip.

A valid resistance reading is present again after the compressor has cooled down.

Burned out motor.

(open winding)

Burned out motor.

(shorted windings)

Remove wires from compressor.

Ohmmeter shows infinite resistance between any two terminals Note: Be sure compressor overload has had a chance to reset. If compressor is hot this may take several hours.

Replace the compressor.

Remove wires from compressor.

Resistance between any two terminals is below the specified value.

Replace the compressor.

Compressor starts hard

Compressor

Stage 2 will not activate

000821MAN-01

Motor shorted to ground. Remove wires from compressor.

Check for infinite resistance between each terminal and ground.

If any terminal to ground is not infinite replace the compressor.

Seized compressor due to locked or damaged mechanism.

Compressor attempts to start but trips its internal overload after a few seconds. (Run capacitor already verified)

Attempt to “rock” compressor free.

If normal operation cannot be established, replace compressor.

Start capacitor faulty.

(Single phase only)

Check with capacitance meter.

Check for black residue around blowout hole on top of capacitor.

Replace if faulty.

Remove black residue in electrical box if any.

Potential Relay faulty.

(Single phase only)

Replace with new one and verify compressor starts properly.

Replace if faulty.

Compressor is “tight” due to damaged mechanism.

Compressor attempts to start but trips its internal overload after a few seconds. Run capacitor has been verified already.

Attempt to “rock” compressor free.

If normal operation cannot be established, replace compressor.

Faulty Stage 2 module. Verify if 24VAC is present across

Y2 and C of the terminal strip.

Replace module if signal is present. Check wiring if signal is not present.


Fault

OPERATION TROUBLESHOOTING - HEATING MODE

Possible Cause

High Discharge

Pressure

Air Flow

Verification

See Fan Troubleshooting section

Recommended Action

Correct the problem.

TXV adjusted too far closed.

Verify superheat. It should be between 8-12°F (3-6°C). Superheat will be high if TXV is closed too far.

Adjust TXV to obtain 8-12°F

(3-6°C) superheat.

TXV stuck almost closed or partially blocked by foreign object.

Adjusting the TXV does not affect the superheat or the suction pressure.

Adjust the TXV all the way in and out a few times to loosen it. Replace TXV if this does not work.

Filter-drier plugged Feel each end of the filter- drier, it should be the same temperature. If there is a temperature difference then it is plugged. Also causes low suction pressure.

Replace filter-drier.

Unit is overcharged.

(Only possible if unit has been opened in the field and incorrectly charged).

High sub-cooling, low delta T across air coil.

Remove 1/2lb of refrigerant at a time and verify that the discharge pressure reduces.

Low Suction

Pressure

Low or no Outdoor liquid flow

Entering liquid temperature too cold.

Delta T across the Outdoor Loop ports should be between 5-7°F

(3-4°C), or compare pressure drop to the tables for the unit.

Determine the cause of the flow restriction and correct it.

Verify pumps are working and sized correctly for ground loop systems.

Verify well pump and water valve is working for ground water systems.

Measure the entering liquid temperature. Most likely caused by undersized ground loop.

Increase the size of the ground loop.

Dirty or fouled coaxial heat exchanger.

(typically for ground water, unlikely for ground loop)

Disconnect the water lines and check the inside of the pipes for scale deposits.

Have a qualified service technician backflush the coaxial exchanger.

Return air too cold Measure return air temperature.

Should be above 60°F (15°C).

Restrict air flow temporarily until room comes up to temperature.



TXV may be frosting up.


ISSUE 02: 08 OCT 2010

Low refrigerant charge. Entering liquid temperature, flow and entering air temperature are good but suction is low. Check static refrigeration pressure of the unit for a very low value.



Faulty compressor, not pumping.

Pressures change only slightly from static values when compressor is started.

Page 27

Replace compressor.

000821MAN-01

Fault

OPERATION TROUBLESHOOTING - HEATING MODE

Possible Cause Verification

High Suction

Pressure

(may appear to not be pumping)

Leaking reversing valve. Reversing valve is the same temperature on both ends of body, common suction line is warm, compressor is running hot.

TXV adjusted too far open.

Verify superheat. It should be between 8-12°F (3-6°C). Superheat will be low if TXV is open too far.


Replace reversing valve.


(3-6°C) superheat.

TXV stuck open. Adjusting the TXV does not affect the superheat or the suction pressure. Low super heat and discharge pressure.

Adjust the TXV all the way in and out a few times to loosen it. Replace

TXV if this does not work.

Compressor frosting up

See Low Suction

Pressure in this section.

TXV frosting up

Random high pressure trip

(does not occur while on site)



Attempt to adjust the TXV all the way out and all the way in a few times to loosen it. Replace TXV if this does not work.


Points pitted or burned. Contactor sometimes sticks causing the compressor to run without the fan, tripping the high pressure control.

Intermittent fan.

Replace contactor.

See Fan Troubleshooting section. Correct the problem.

Fault

Heating instead of cooling

OPERATION TROUBLESHOOTING - COOLING MODE


Thermostat not set up properly.

Faulty reversing valve solenoid coil.

Verify that there is 24VAC across

O/B/W1 and C of the terminal strip when calling for cooling.

Verify solenoid by removing it from the shaft while the unit is running.

There should be a loud “whoosh” sound when it is removed.

Correct thermostat setup.

Change to a different thermostat.

Replace solenoid if faulty.

High Discharge pressure

000821MAN-01

Faulty reversing valve. A click can be heard when the coil is energized but the unit continues to heat instead of cool.


Low or no Outdoor liquid flow

Entering liquid temperature too warm.

Dirty or fouled coaxial heat exchanger.

(typically for ground water, unlikely for ground loop)

Delta T across the Outdoor Loop ports should be between 8-12°F

(4-7°C), or compare pressure drop to the tables for the unit.

Most likely caused by undersized ground loop.

Disconnect the water lines and check the inside of the pipes for scale deposits.

Determine the cause of the flow restriction and correct it.

Verify pumps are working for ground loop systems. Verify well pump and water valve is working for ground water systems.

Verify the ground loop sizing. Increase the size of the ground loop if undersized.

Have a qualified service technician backflush the coaxial exchanger.


Fault

High Discharge pressure

OPERATION TROUBLESHOOTING - COOLING MODE


Unit is overcharged.

(Only possible if unit has been opened in the field and incorrectly charged).

High sub-cooling, low delta T across water coil.

Remove 1/2lb of refrigerant at a time and verify that the discharge pressure reduces.

High Suction

Pressure

(may appear to not be pumping)

TXV adjusted too far open.

TXV stuck open.

Verify superheat. It should be between 8-12°F (3-6°C). Superheat will be low if TXV is open too far.


(3-6°C) superheat.

Adjusting the TXV does not affect the superheat or the suction pressure. Low super heat and discharge pressure.


Leaking reversing valve. Reversing valve is the same temperature on both ends of body, common suction line is warm, compressor is running hot.


Low Suction

Pressure

Air Flow See Fan Troubleshooting section.

Note: low airflow will cause the air coil to ice up once the suction drops below 90PSIG .

Correct the problem.


Adjusting the TXV does not affect the superheat or the suction pressure. TXV may be frosting up.


Low or no refrigerant charge.

Entering air temperature and airflow are good but suction is low.

Check static refrigeration pressure of unit for very low value.



Faulty compressor, not pumping.

See Low Suction

Pressure in this section.

Pressures change only slightly from static values when compressor is started.

Replace compressor.

Compressor frosting up

TXV frosting up TXV stuck almost closed or partially blocked by foreign object.



Random Low

Pressure trip

(does not occur while there)


Points pitted or burned. Contactor sometimes sticks causing the compressor to run without the fan, tripping the low pressure control.

Replace contactor.

ISSUE 02: 08 OCT 2010

Intermittent fan. See Fan Troubleshooting section. Correct the problem.

Page 29 000821MAN-01

Fault

Low Airflow

Possible Cause

Dirty air filter

Dirty air coil.

Poor Ductwork

FAN TROUBLESHOOTING

Inspect.

Verification

Inspect.

Measure delta T between supply and return ducts at the unit, it in heating mode, it should not be above 30°F(17°C).


Replace.

Clean.

The ECM fan will provide proper airflow up to 0.5 inH2o for 1/2HP motors and 0.7 inH2o for 1HP motors. The ductwork is poorly designed or greatly undersized if the fan motor cannot provide the required airflow.

Select a higher setting.

Fan operating on wrong Stage speed

Air flow selected on Tap

Board is too low.

Check selection on Air Flow Tap

Board.

Air flow reduction is enabled.

Fan Control Signal Harness is loose.

AR1 and AR2 are connected with a dry contact.

Air flow reduction may not be feasible with poor ductwork, and/or lower Air Flow selections. Increase settings until unit operates properly.

Verify that the connector is properly inserted into the fan motor. Gently tug on each wire to verify it is properly inserted into the connector.

Repair any loose connections.

Faulty Control Signal Harness or faulty motor head.

Measure 24VAC between White (pin

3) and the following at the fan control signal harness (insert probes in connector where wire is inserted, do not unplug the connector):

Circulation = Grey (pin 15)

Stage 1 = Yellow (pin 6)

Stage 2=Yellow/Black (pin14)

Stage 3 = Violet (pin 2)

If proper signal isn’t present, replace Fan Control Signal Harness. If proper signal is present, replace fan motor head.

Fan not operating or operating intermittently

Fan Control Signal Harness and/or Fan Power

Harness is loose.

Verify that the connector is properly inserted into the fan motor. Gently tug on each wire to verify it is properly inserted into the connector.

Repair any loose connections.

000821MAN-01

Faulty Control Signal Harness or;

Faulty motor head.

Measure 24VAC between White (pin

3) and the following at the fan control signal harness (insert probes in connector where wire is inserted, do not unplug the connector):

Circulation = Grey (pin 15)

Stage 1 = Yellow (pin 6)

Stage 2=Yellow/Black (pin14)

Stage 3 = Violet (pin 2)

If proper signal isn’t present, replace Fan Control Signal Harness. If proper signal is present, replace fan motor head.

Fan Power Harness faulty or;

Faulty motor.

Insert the tips of the voltmeter probes into the back of the connector at the fan to measure the voltage across the red and black wires, value should be 230VAC

Replace Power Harness if

230VAC is not present, replace motor if 230VAC is present


Fault

PLENUM HEATER TROUBLE SHOOTING

Possible Cause

No 230VAC across plenum heater L1 and L2

Disconnect switch open.

(if installed)


Verify disconnect switch is in the ON position.

Determine why the disconnect switch was opened, if all is OK close the switch.

Fuse blown /

Breaker Tripped.

At plenum heater disconnect box (if installed), voltmeter shows voltage on the line side but not on the load side.

Check if breaker is tripped.

Reset breaker or replace fuse at plenum heater disconnect box.

Replace fuse with proper size and type. (Time-delay type “D”)

Same “Line” to L1 and L2 Measuring L1 to ground and L2 to ground both yield 115VAC, but L1 to

L2 yields 0VAC.

Correct wiring.

No W2 signal at

Heat pump terminal strip

No call for auxiliary or emergency heat from thermostat.

Verify that the thermostat is indicating that auxiliary or emergency heat should be on.

Set thermostat to engage auxiliary or emergency heat (note some thermostats require a jumper between auxiliary and emergency. Check the thermostat manual).

Faulty thermostat. Thermostat doesn’t indicate a call for auxiliary or emergency when it should.

Replace thermostat.

Faulty thermostat. Thermostat indicates auxiliary or emergency but no 24VAC signal present across C and the auxiliary and/ or emergency pin at the thermostat.

Replace thermostat.

Faulty thermostat wiring. 24VAC signal is present across C and the auxiliary and/or emergency pin at the thermostat but no 24VAC signal is present across W2 and C at the heat pump terminal strip.

Correct wiring.

No 24VAC signal from C to ground at the plenum heater control connector

Plenum Heater transformer is burned out.

Plenum heater control board is faulty.

No 24VAC signal from 1 to ground at the plenum heater control connector

Faulty wiring.

Faulty wiring.

ISSUE 02: 08 OCT 2010

Voltmeter does not show 24VAC across transformer secondary winding.

Replace transformer.

Transformer tested OK in previous step.

Replace control board.

24VAC present across C and ground at the plenum heater, but not across ground of the plenum heater and I of the heat pump terminal strip

Correct wiring.

If previous step tested OK, 24VAC is present across ground of the plenum heart and 1 of the heat pump terminal strip, but not across ground of the plenum heater and 1 of the plenum heater.

Correct wiring.

Page 31 000821MAN-01

Fault

PLENUM HEATER TROUBLE SHOOTING

Possible Cause

No 24VAC signal from 1 to ground at the plenum heater control connector

Faulty Plenum Heater

Relay in heat pump


24VAC is present across pin 1 and pin 3 of the relay, 24VAC is present from heat pump terminal strip I to plenum heater ground, but not from heat pump terminal strip 1 to plenum heater ground.

Replace relay.

Thermal overload is tripped.

Fan not operating

Faulty overload

See Fan Not Operating section

Reset thermal overload

Correct problem. Reset thermal overload.

Replace if faulty.

Fault

Insufficient hot water

(Tank Problem)

DOMESTIC HOT WATER (DHW) TROUBLE SHOOTING


Thermostat on hot water tank set too low. Should be set at 120°F. (140°F if required by local code)

Breaker tripped, or fuse blown in electrical supply to hot water tank.

Reset button tripped on hot water tank.

Visually inspect the setting.

Check both line and load sides of fuses. If switch is open determine why.

Check voltage at elements with multimeter.

Readjust the setting to 120°F.

(140°F if required by local code)

Replace blown fuse or reset breaker.

Push reset button.

Insufficient hot water

(Heat Pump

Problem)

Circulator pump not operating.

Visually inspect the pump to see if shaft is turning. Use an amprobe to measure current draw.

Blockage or restriction in the water line or hot water heat exchanger.

Check water flow and power to pump. Check water lines for obstruction

Faulty DHW cutout (failed open).

Check contact operation. Should close at 120°F and open at 140°F.

Heat pump not running enough hours to make sufficient hot water.

Note the amount of time the heat pump runs in any given hour.

Water is too hot. Faulty DHW cutout (failed closed).

Check contact operation. Should close at 120°F and open at 140°F.

Thermostat on hot water tank set too high. Should be set at 120°F. (140°F if required by local code)

Visually inspect the setting.

Replace if faulty.

Remove obstruction in water lines. Acid treat the domestic hot water coil.

Replace DHW cutout if faulty.

Temporarily turn up the tank thermostats until colder weather creates longer run cycles.

Replace DHW cutout if faulty.

Readjust the setting to 120°F.

(140°F if required by local code)

Trouble Shooting Tools

Refrigeration Gauges

In-line Flowmeter

000821MAN-01

Digital Thermometer

Page 32

Multimeter -

Voltmeter /

Amprobe

Dole flow control Valve

The Dole® flow control is a simple, selfcleaning device designed to deliver a constant volume of water from any outlet whether the pressure is 15 psig or as high as 125 psi. The controlling mechanism consists of a flexible orifice that varies its area inversely with pressure so that a constant flow is maintained.

ISSUE 02: 08 OCT 2010

REPAIR PROCEDURES

PUMP DOWN PROCEDURE

STEP 1 Connect the refrigerant recovery unit to the heat pump service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual. If there was a compressor burn out, the refrigerant cannot be reused and must be disposed of according to local codes.

STEP 2 All water coil heat exchangers must either have full flow or be completely drained of fluid before recovery begins. Failure to do so can freeze and rupture the heat exchanger, voiding its warranty. (Note that this does not apply to double wall domestic hot water exchangers (desuperheater coils)

STEP 3 Ensure all hose connections are properly purged of air. Start the refrigerant recovery as per the instructions in the recovery unit manual.

STEP 4 Allow the recovery unit suction pressure to reach a vacuum. Once achieved, close the charging manifold valves. Shut down, purge and disconnect the recovery unit as per the instructions in its manual. Ensure the recovery tank valve is closed before disconnecting the hose to it.

STEP 5 Connect a nitrogen tank to the charging manifold and add nitrogen to the heat pump until a positive pressure of 5-10PSIG is reached. This prevents air from being sucked into the unit by the vacuum when the hoses are disconnected.

STEP 6 The heat pump is now ready for repairs. Always ensure nitrogen is flowing through the system during any soldering procedures to prevent soot buildup inside the pipes. Maritime Geothermal Ltd. recommends replacing the liquid line filter-drier anytime the refrigeration system has been exposed to the atmosphere.

VACUUM AND CHARGING PROCEDURE

STEP 1 After completion of repairs and nitrogen pressure testing, the refrigeration circuit is ready for vacuuming.

STEP 2 Release the refrigerant circuit pressure and connect the vacuum pump to the charging manifold. Start the vacuum pump and open the charging manifold valves. Vacuum until the vacuum gauge remains at less than 500 microns for at least 1 minute with the vacuum pump valve closed.

STEP 3 Close the charging manifold valves then shut off and disconnect the vacuum pump. Place a refrigerant tank with the proper refrigerant on a scale and connect it to the charging manifold. Purge the hose to the tank.

STEP 4 Weigh in the appropriate amount of refrigerant through the low pressure (suction) service port. Refer to the label on the unit or TABLE 12 - Refrigerant Charge Chart for the proper charge amount.

STEP 5 If the unit will not accept the entire charge, the remainder can be added through the low pressure service port after the unit has been restarted.

REPLACMENT PROCEDURE FOR A COMPRESSOR BURN-OUT

STEP 1 Pump down the unit as per the Pump Down Procedure above.

STEP 2 Replace the compressor. Replace the liquid line filter-drier.

STEP 3 Vacuum the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed.

STEP 4 Charge the unit and operate it for continuously for 2 hours. Pump down the unit and replace the filter-drier.

Vacuum the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed.

STEP 5 Charge the unit (refrigerant can be re-used) and operate it for 2-3 days. Pump down the unit and replace the filter-drier.

STEP 6 Charge the unit (refrigerant can be re-used) and operate it for 2 weeks. Pump down the unit and replace the filter-drier.

STEP 7 Charge the unit a final time. Unit should now be clean and repeated future burn-outs can be avoided.


REFRIGERATION CIRCUIT DIAGRAMS


REFRIGERATION CIRCUIT DIAGRAMS (continued)


Model Specific Information

This section provides general information particular to each model. For complete specifications please see the specifications

REFRIGERANT CHARGE CHART

Table 12 - Refrigerant - R410a

SIZE Lbs. kg

25

45

55

65

75

5.0 2.3

5.5 2.5

8.0 3.6

8.5 3.9

8.5 3.9

80 9.0 4.1

System contains POE oil.

SHIPPING INFORMATION

MODEL

Table 13 - Shipping Information

WEIGHT

Lbs. (kg)

DIMENSIONS in (cm)

L W H

25

45

55

65

75

80

325 (147)

420 (191)

463 (210)

511 (232)

550 (249)

558 (253)

60 (152) 30 (76) 28 (71)

60 (152) 30 (76) 28 (71)

70 (178) 36 (91) 29 (74)

70 (178) 36 (91) 29 (74)

70 (178) 36 (91) 29 (74)

70 (178) 36 (91) 29 (74)

STADARD CAPACITY RATINGS

The tables below depict the results of standard capacity rating tests according to C13256-1, which is identical to ISO13256-1.

Stage 1 values do not apply to single stage units. Refer to the Electrical Tables to determine which models are single stage.

Table 14 - Standard Capacity Ratings - Ground Loop Heating* 60Hz

EAT 68°F (20°C)

STAGE 2 - ELT 32°F (0°C)

Model Size Liquid Flow

Pressure

Drop

Mode Airflow

Input

Energy

Capacity COP

H

Tons IGAL USG L/s PSI kPA

25

45

55

65

75

80

2

3

4

5

6

6

6

8

10 12.0 0.76 5.0 34.5

12

7.2 0.45 3.4 23.4

9.6 0.61 3.7 25.5

14.4 0.91 4.2

14 16.8 1.06 4.6

29.0

31.7

14 16.8 1.06 4.6 31.7

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

CFM L/s

850

1000

1200

1400

1400

1700

401

472

566

661

661

802

1700

2100

802

991

1900 897

2400 1133

2400 1133

Watts

1,085

1,465

1,435

2,190

2,310

3,120

2,690

3,670

3,375

4,530

5,420

BTU/Hr kW

14,900

17,600

22,800

29,100

33,100

39,700

39,700

48,000

44,900

53,700

63,500

4.4

5.2

6.7

8.5

9.7

11.6

11.6

14.1

13.1

15.7

18.6

W/W

4.03

3.52

4.66

3.89

4.21

3.73

4.32

3.83

3.90

3.47

3.43

* 15% NaCl by Weight Ground Loop Fluid

Table 15 - Standard Capacity Ratings - Ground Water Heating 60Hz

EAT 68°F (20°C) ELT 50°F (10°C)

Model

25

45

55

65

75

80

Size Liquid Flow

Pressure

Drop


2

3

4

5

6

6

6

8

10

12

14

14

7.2

9.6

12.0

14.4

16.8

16.8

0.45

0.61

0.76

0.91

1.06

1.06

2.5

3.3

3.3

3.1

3.7

3.7

17.2

22.8

22.8

21.4

25.5

25.5

Mode

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Airflow

CFM L/s

850

1000

1200

1400

1400

1700

1700

2100

1900

2400 1133

2400 1133

401

472

566

661

661

802

802

991

897

Input

Energy

Watts

1,110

1,625

1,465

2,465

2,350

3,370

2,755

4,105

3,415

4,815

5,770

Capacity

BTU/Hr kW

16,800

23,800

4.9

7.0

25,800 7.6

37,200 10.9

38,500 11.3

49,900 14.6

45,600 13.3

61,100 17.9

50,500 14.8

69,000 20.2

81,500 23.9

COP

H

W/W

4.43

4.28

5.16

4.43

4.80

4.34

4.83

4.36

4.33

4.18

4.14


STADARD CAPACITY RATINGS (continued)

Table 16 - Standard Capacity Ratings -

Ground Loop Cooling*

60Hz

EAT 80.6°F (27°C)

STAGE 2 - ELT 77°F (25°C)

Model Size Liquid Flow

Pressure

Drop

Mode Airflow

Input

Energy

Capacity COP c

Tons IGAL USG L/s PSI kPA CFM L/s Watts BTU/Hr kW W/W

25

45

55

65

75

80

2

3

4

5

6

6

6

8

10 12.0 0.76 3.5 24.1

12

7.2 0.45 2.3 15.9

9.6 0.61 2.9 20.2

14.4 0.91 3.2

14 16.8 1.06 3.9

22.1

26.9

14 16.8 1.06 3.9 26.9

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

850

1000

1200

1400

1400

401

472

566

661

661

1700

1700

2100

1900

802

802

991

897

2400 1133

2400 1133

925

1,615

980

1,965

1,760

2,990

2,205

3,980

2,995

4,975

5,850

21,700

26,200

6.3

7.7

28,400 8.3

37,200 10.9

42,800 12.5

51,800 15.2

47,600 14.0

59,900 17.6

57,300 16.8

70,000 20.5

81,000 23.7

6.87

4.76

8.49

5.54

7.12

5.08

6.33

4.41

5.61

4.12

4.05

* 15% NaCl by Weight Ground Loop Fluid

Table 17 - Standard Capacity Ratings -

Ground Water Cooling

60Hz

EAT 80.6°F (27°C) ELT 59°F (15°C)

Model

25

45

55

65

75

80

Size Liquid Flow

Pressure

Drop


2

3

4

5

6

6

6

8

10

12

14

14

7.2

9.6

12.0

14.4

16.8

16.8

0.45

0.61

0.76

0.91

1.06

1.06

2.1

2.5

3.1

2.7

3.4

3.4

14.5

17.2

21.4

18.6

23.4

23.4

Mode

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Stage 2

Stage 1

Airflow

CFM L/s

850

1000

1200

1400

1400

1700

1700

2100

1900

991

897

2400 1133

2400 1133

401

472

566

661

661

802

802

Input

Energy

Watts

805

1,310

835

1,670

1,575

2,625

1,965

3,465

2,725

4,440

5,100

Capacity

BTU/Hr kW

22,500

29,500

6.6

8.6

30,100 8.8

40,000 11.7

45,500 13.3

58,300 17.1

50,800 14.9

67,200 19.7

58,500 17.1

74,700 21.9

85,500 25.1

COP c

W/W

8.15

6.59

10.52

7.01

8.45

6.50

7.58

5.68

6.29

4.93

4.91


CAPACITY RATINGS

Heating Mode

RH-25-HACW-P-1T

Source Data (Outdoor Loop)

ELT

°F

°C

Evap.

Temp

Flow LLT

°F USGPM °F

°C L/s °C

Delta T

°F

°C

HAB

BTU/Hr

Watts

Compressor Fan* Effective COPh

Watts Amps Watts Watts W/W

EAT

°F

°C

22.0 15

Nominal 2 ton

Power Consumption

7.2 18.1 3.9 11,143 1,275 5.4 97 1,365 3.36 68

R410a 60 Hz

Sink Data (Indoor Loop)

Cond.

Temp.

°F

°C

Air

Flow

LAT Delta T

CFM °F

L/s °C

°F

°C

Net

Output

BTU/Hr

Watts

91 1,000 82.4 14.4 15,637

-5.6

28.0

-9.4

20

0.454 -7.7 2.2 3,265 20.0 32.8 472 28.0 8.0 4,581

7.2 23.8 4.2 12,164 1,332 5.6 97 1,422 3.47 68 94 1,000 83.6 15.6 16,854

-2.2

34.0

-6.7

25

0.454 -4.6 2.3 3,564 20.0 34.4 472 28.6 8.6 4,938

7.2 29.4 4.6 13,333 1,372 5.8 97 1,462 3.64 68 96 1,000 84.8 16.8 18,159

1.1 -3.9 0.454 -1.5 2.6 3,907 20.0 35.6 472 29.3 9.3 5,320

40.0

4.4

30

-1.1

7.2 35.0

0.454 1.6

5.0

2.8

14,493 1,431 6.0

4,246

97 1,521 3.76 68 99 1,000 86.0 18.0 19,522

20.0 37.2 472 30.0 10.0 5,720

44.0 35 7.2 38.5 5.5 16,931 1,487 6.2 97 1,565 4.15 68 101 1,000 88.5 20.5 22,149

6.7 1.7 0.454 3.6 3.1 4,961 20.0 38.3 472 31.4 11.4 6,490

50.0 40 7.2 44.0 6.0 18,325 1,550 6.5 97 1,628 4.28 68 104 1,000 89.9 21.9 23,758

10.0 4.4 0.454 6.7 3.3 5,369 20.0 40.0 472 32.2 12.2 6,961

56.0 45 7.2 49.5 6.5 19,921 1,594 6.7 97 1,672 4.47 68 106 1,000 91.5 23.5 25,504

13.3 7.2 0.454 9.7 3.6 5,837 20.0 41.1 472 33.1 13.1 7,473

62.0 50 7.2 55.0 7.0 21,470 1,662 7.0 97 1,740 4.60 68 109 1,000 93.2 25.2 27,284

16.7 10.0 0.454 12.8 3.9 6,291 20.0 42.8 472 34.0 14.0 7,994

Compressor: ZPS20K4E-PFV * @ 37.3Pa (0.15inH2o) Ext. Static

Cooling Mode

RH-25-HACW-P-1T

Source Data (Indoor Loop)

EAT

Evap.

Temp

Airflow LAT Delta T Latent Sensible

°F

°C

°F

°C

CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts

R410a 60 Hz

Power Consumption Sink Data (Outdoor Loop)

HAB Compressor Fan* Effective

Efficiency

ELT

BTU/Hr Watts Amps Watts Watts EER

Watts COPc

°F

°C

Cond.

Temp.

Flow LLT Delta T Rejection

°F USGPM °F

°C L/s °C

°F BTU/Hr

°C Watts

80.6 47 1,000 59.5 21.1 7,628 22,885 30,513 1,106 4.3 100 1,182 25.8 52 75 7.2 61.6 9.6 34,628

27.0

27.0

8.3

8.3

472 15.3 11.7

472 15.5 11.5

2,235 6,705

2,180 6,540

8,940

8,720

7.56 11.1 23.9 0.454 16.5 5.3 10,146

80.6 47 1,000 60.0 20.6 7,441 22,322 29,763 1,198 4.7 100 1,274 23.4 57 80 7.2 66.5 9.5 34,192

6.85 13.9 26.7 0.454 19.2 5.3 10,018

80.6 48 1,000 60.1 20.5 7,385 22,156 29,542 1,293 5.0 100 1,369 21.6 62 85 7.2 71.5 9.5 34,296

27.0 8.9 472 15.6 11.4 2,164 6,492 8,656 6.32 16.7 29.4 0.454 22.0 5.3 10,049

80.6 48 1,000 60.7 19.9 7,188 21,564 28,753 1,390 5.4 100 1,466 19.6 67 90 7.2 76.4 9.4 33,838

27.0 8.9 472 15.9 11.1 2,106 6,318 8,424 5.75 19.4 32.2 0.454 24.7 5.2 9,914

80.6 49 1,000 61.8 18.8 6,791 20,374 27,166 1,412 5.8 100 1,492 18.2 71 95 7.2 80.0 9.0 32,327

27.0 9.4 472 16.5 10.5 1,990 5,970 7,959 5.33 21.7 35.0 0.454 26.7 5.0 9,472

80.6 49 1,000 62.3 18.3 6,593 19,779 26,373 1,512 6.2 100 1,592 16.6 76 100 7.2 84.9 8.9 31,875

27.0 9.4 472 16.9 10.1 1,932 5,795 7,727 4.85 24.4 37.8 0.454 29.4 4.9 9,339

80.6 50 1,000 62.6 18.0 6,511 19,534 26,045 1,618 6.6 100 1,698 15.3 81 105 7.2 89.9 8.9 31,908

27.0 10.0 472 17.0 10.0 1,908 5,723 7,631 4.49 27.2 40.6 0.454 32.1 4.9 9,349

80.6 50 1,000 63.1 17.5 6,302 18,907 25,210 1,729 7.1 100 1,809 13.9 86 110 7.2 94.7 8.7 31,452

27.0 10.0 472 17.3 9.7

Compressor: ZPS20K4E-PFV

1,847 5,540 7,386 4.08 30.0 43.3 0.454 34.9 4.9 9,215

* @ 37.3Pa (0.15inH2o) Ext. Static


CAPACITY RATINGS (continued)

Heating Mode

RH-45-HACW-P-1T


Nominal 3 ton


R410a 60 Hz


ELT

°F

°C

Evap.

Temp

Flow LLT

°F USGPM °F

°C L/s °C

Delta T

°F

°C

HAB

BTU/Hr

Watts



EAT

°F

°C

Cond.

Temp.

°F

°C

Air

Flow

CFM

L/s

LAT Delta T

Net

Output

°F

°C

°F BTU/Hr

°C Watts

26.0 15 9.6 21.8 4.2 20,108 135 2,136 3.72 68 103 1,400 85.9 17.9 27,106

-3.3 -9.4 0.606 -5.6 2.3 5,891 20.0 39.4 661 29.9 9.9 7,942

32.0 20 9.6 27.5 4.5 21,898 135 2,193 3.89 68 105 1,400 87.2 19.2 29,091

0.0 -6.7 0.606 -2.5 2.5 6,416 20.0 40.6 661 30.7 10.7 8,524

38.0 25 9.6 33.1 4.9 23,818 135 2,250 4.06 68 107 1,400 88.6 20.6 31,207

3.3 -3.9 0.606 0.6 2.7 6,979 20.0 41.7 661 31.4 11.4 9,144

44.0 30 9.6 38.7 5.3 25,701 135 2,335 4.19 68 110 1,400 90.0 22.0 33,382

6.7 -1.1 0.606 3.7 3.0 7,530 20.0 43.3 661 32.2 12.2 9,781

47.0 35 9.6 41.2 5.8 28,591 135 2,381 4.48 68 112 1,400 92.0 24.0 36,436

8.3 1.7 0.606 5.1 3.2 8,377 20.0 44.4 661 33.4 13.4 10,676

53.0 40 9.6 46.8 6.2 30,756 135 2,471 4.61 68 115 1,400 93.7 25.7 38,907

11.7 4.4 0.606 8.2 3.4 9,011 20.0 46.1 661 34.3 14.3 11,400

59.0 45 9.6 52.3 6.7 33,262 135 2,534 4.81 68 117 1,400 95.5 27.5 41,627

15.0 7.2 0.606 11.3 3.7 9,746 20.0 47.2 661 35.3 15.3 12,197

65.0 50 9.6 57.8 7.2 35,919 135 2,599 5.02 68 119 1,400 97.4 29.4 44,506

18.3 10.0 0.606 14.3 4.0 10,524 20.0 48.3 661 36.3 16.3 13,040

Compressor: ZPS30K4E-PFV * @ 37.3Pa (0.15inH2o) Ext. Static

Cooling Mode

RH-45-HACW-P-1T


R410a 60 Hz


EAT

°F

°C

Evap.

Temp

°F

°C


CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts


Efficiency

ELT


Watts COPc

°F

°C

Cond.

Temp.


°F USGPM °F

°C L/s °C

°F

°C

BTU/Hr

Watts

80.6 40 1,400 60.3 20.3 10,271 41,083 1,381 5.9 150 1,528 26.9 53 70 9.6 62.6 9.6 46,309

27.0

27.0

4.4

4.4

661 15.7 11.3

661 16.0 11.0

3,009

2,941

9,028 12,037

8,824 11,765

7.88 11.7 21.1 0.606 17.0 5.4 13,568

80.6 40 1,400 60.7 19.9 10,039 40,155 1,497 6.4 150 1,644 24.4 58 75 9.6 67.5 9.5 45,775

7.16 14.4 23.9 0.606 19.7 5.3 13,412

80.6 41 1,400 60.8 19.8 9,982 29,945 39,927 1,614 6.9 150 1,761 22.7 63 80 9.6 72.6 9.6 45,949

27.0 5.0 661 16.0 11.0 2,925 8,774 11,699 6.64 17.2 26.7 0.606 22.5 5.3 13,463

80.6 42 1,400 61.0 19.6 9,914 29,743 39,657 1,734 7.4 150 1,881 21.1 68 85 9.6 77.6 9.6 46,088

27.0 5.6 661 16.1 10.9 2,905 8,715 11,619 6.18 20.0 29.4 0.606 25.3 5.3 13,504

80.6 43 1,400 61.9 18.7 9,444 28,332 37,777 1,749 7.9 150 1,891 20.0 74 90 9.6 83.2 9.2 44,256

27.0 6.1 661 16.6 10.4 2,767 8,301 11,068 5.85 23.3 32.2 0.606 28.5 5.1 12,967

80.6 43 1,400 62.4 18.2 9,191 27,573 36,763 1,869 8.4 150 2,011 18.3 79 95 9.6 88.1 9.1 43,654

27.0 6.1 661 16.9 10.1 2,693 8,079 10,772 5.36 26.1 35.0 0.606 31.2 5.1 12,791

80.6 44 1,400 62.6 18.0 9,095 27,285 36,381 1,995 9.0 150 2,137 17.0 84 100 9.6 93.1 9.1 43,703

27.0 6.7 661 17.0 10.0 2,665 7,995 10,659 4.99 28.9 37.8 0.606 33.9 5.1 12,805

80.6 44 1,400 63.1 17.5 8,827 26,482 35,309 2,128 9.6 150 2,270 15.6 89 105 9.6 98.0 9.0 43,083

27.0 6.7 661 17.3 9.7


2,586 7,759 10,346 4.56 31.7 40.6 0.606 36.7 5.0 12,623




Heating Mode

RH-55-HACW-P-1T


ELT

°F

°C

Evap.

Temp

Flow LLT Delta T HAB

°F USGPM °F

°C L/s °C

°F

°C

Nominal 4 ton


Compressor Fan* Effective COPh EAT

BTU/Hr Watts Amps Watts Watts W/W

Watts

°F

°C

R410a 60 Hz


Cond.

Temp.

°F

°C

Air

Flow

CFM

L/s

LAT Delta T

°F

°C

Net

Output

°F BTU/Hr

°C Watts

25.0 15 12.0 20.9 4.1 25,964 285 3,056 3.45 68 103 1,700 87.5 19.5 35,943

-3.9 -9.4 0.757 -6.2 2.3 7,607 20.0 39.4 802 30.8 10.8 10,531

31.0 20 12.0 26.5 4.5 28,831 285 3,126 3.66 68 105 1,700 89.2 21.2 39,050

-0.6 -6.7 0.757 -3.1 2.5 8,447 20.0 40.6 802 31.8 11.8 11,442

37.0 25 12.0 32.0 5.0 31,913 285 3,196 3.88 68 107 1,700 91.0 23.0 42,371

2.8 -3.9 0.757 0.0 2.8 9,350 20.0 41.7 802 32.8 12.8 12,415

43.0 30 12.0 37.4 5.6 35,215 285 3,267 4.12 68 109 1,700 92.9 24.9 45,914

6.1 -1.1 0.757 3.0 3.1 10,318 20.0 42.8 802 33.9 13.9 13,453

48.0 35 12.0 41.9 6.1 37,095 285 3,358 4.21 68 111 1,700 94.2 26.2 48,239

8.9 1.7 0.757 5.5 3.4 10,869 20.0 43.9 802 34.6 14.6 14,134

54.0 40 12.0 47.3 6.7 40,699 285 3,432 4.45 68 113 1,700 96.3 28.3 52,095

12.2 4.4 0.757 8.5 3.7 11,925 20.0 45.0 802 35.7 15.7 15,264

60.0 45 12.0 52.7 7.3 44,533 285 3,508 4.69 68 115 1,700 98.5 30.5 56,189

15.6 7.2 0.757 11.5 4.1 13,048 20.0 46.1 802 37.0 17.0 16,463

66.0 50 12.0 58.0 8.0 48,604 285 3,586 4.94 68 117 100.9 32.9 60,527

18.9 10.0 0.757 14.4 4.4 14,241


20.0 47.2 802 38.3 18.3 17,734


Cooling Mode

RH-55-HACW-P-1T


R410a 60 Hz


EAT

°F

°C

Evap.

Temp

°F

°C


CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts


Efficiency

ELT


Watts COPc

°F

°C

Cond.

Temp.


°F USGPM °F

°C L/s °C

°F

°C

BTU/Hr

Watts

80.6 45 1,700 56.4 24.2 14,834 59,336 2,100 9.1 310 2,392 24.8 51 75 12.0 62.3 11.3 67,562

27.0

27.0

7.2

7.2

802 13.6 13.4

802 13.9 13.1

4,346

4,247

13,039 17,385

12,740 16,987

7.27 10.6 23.9 0.757 16.8 6.3 19,795

80.6 45 1,700 57.0 23.6 14,494 57,975 2,244 9.7 310 2,536 22.9 56 80 12.0 67.1 11.1 66,693

6.70 13.3 26.7 0.757 19.5 6.2 19,541

80.6 46 1,700 57.1 23.5 14,425 57,701 2,392 10.4 310 2,684 21.5 61 85 12.0 72.2 11.2 66,924

27.0 7.8 802 13.9 13.1 4,227 12,680 16,906 6.30 16.1 29.4 0.757 22.3 6.2 19,608

80.6 46 1,700 57.7 22.9 14,060 56,240 2,542 11.0 310 2,834 19.8 66 90 12.0 77.0 11.0 65,976

27.0 7.8 802 14.3 12.7 4,120 12,359 16,478 5.81 18.9 32.2 0.757 25.0 6.1 19,331

80.6 47 1,700 59.1 21.5 13,182 52,730 2,589 11.6 310 2,891 18.2 74 95 12.0 84.4 10.4 62,623

27.0 8.3 802 15.1 11.9 3,862 11,587 15,450 5.34 23.3 35.0 0.757 29.1 5.8 18,348

80.6 47 1,700 59.7 20.9 12,812 51,249 2,743 12.3 310 3,045 16.8 79 100 12.0 89.3 10.3 61,670

27.0 8.3 802 15.4 11.6 3,754 11,262 15,016 4.93 26.1 37.8 0.757 31.8 5.7 18,069

80.6 48 1,700 59.9 20.7 12,681 50,725 2,906 13.0 310 3,208 15.8 84 105 12.0 94.3 10.3 61,700

27.0 8.9 802 15.5 11.5 3,716 11,147 14,862 4.63 28.9 40.6 0.757 34.6 5.7 18,078

80.6 48 1,700 60.6 20.0 12,284 49,136 3,076 13.8 310 3,378 14.5 89 110 12.0 99.1 10.1 60,691

27.0 8.9 802 15.9 11.1


3,599 10,798 14,397 4.26 31.7 43.3 0.757 37.3 5.6 17,782




Heating Mode

RH-65-HACW-P-1T


ELT

°F

°C

Nominal 5 ton


Evap.

Temp

Flow LLT

°F USGPM °F

°C L/s °C

Delta T

°F

°C

HAB

BTU/Hr

Watts



EAT

°F

°C

R410a 60 Hz


Cond.

Temp.

°F

°C

Flow

CFM

L/min

LAT Delta T

°F

°C

Net

Output

°F BTU/Hr

°C Watts

26.0 15 14.4 21.2 4.8 32,607 465 3,593 3.62 68 97 2,100 87.5 19.5 44,433

-3.3 -9.4 0.909 -6.0 2.6 9,554

32.0 20 14.4 26.8 5.2 35,857 465 3,684 3.82

20.0 36.1 991 30.9 10.9 13,019

68 99 2,100 89.1 21.1 47,993

0.0 -6.7 0.909 -2.9 2.9 10,506 20.0 37.2 991 31.7 11.7 14,062

38.0 25 14.4 32.3 5.7 39,351 465 3,774 4.02 68 101 2,100 90.8 22.8 51,796

3.3 -3.9 0.909 0.1 3.2 11,530 20.0 38.3 991 32.7 12.7 15,176

44.0 30 14.4 37.7 6.3 43,096 465 3,866 4.23 68 103 2,100 92.6 24.6 55,852

6.7 -1.1 0.909 3.2 3.5 12,627 20.0 39.4 991 33.6 13.6 16,365

51.0 35 14.4 44.2 6.8 48,376 465 4,110 4.43 68 106 2,100 95.3 27.3 62,080

10.6 1.7 0.909 6.8 3.8 14,174 20.0 41.1 991 35.2 15.2 18,189

57.0 40 14.4 49.5 7.5 52,760 465 4,209 4.65 68 108 2,100 97.4 29.4 66,802

13.9 4.4 0.909 9.7 4.1 15,458 20.0 42.2 991 36.3 16.3 19,573

63.0 45 14.4 54.9 8.1 57,424 465 4,311 4.88 68 110 2,100 99.6 31.6 71,813

17.2 7.2 0.909 12.7 4.5 16,825 20.0 43.3 991 37.5 17.5 21,041

69.0 50 14.4 60.2 8.8 62,376 465 4,416 5.12 68 112 101.9 33.9 77,123

20.6 10.0 0.909 15.7 4.9 18,276


20.0 44.4 991 38.8 18.8 22,597


Cooling Mode

RH-65-HACW-P-1T


R410a 60 Hz


EAT

°F

°C

Evap.

Temp

°F

°C


CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts


Efficiency

ELT


Watts COPc

°F

°C

Cond.

Temp.


°F USGPM °F

°C L/s °C

°F

°C

BTU/Hr

Watts

80.6 44 2,100 58.1 22.5 17,088 68,351 2,696 11.6 510 3,126 21.9 51 75 14.4 62.0 11.0 79,294

27.0

27.0

6.7

7.2

991 14.5 12.5

991 14.5 12.5

5,007

4,989

15,020 20,027

14,968 19,958

6.41 10.6 23.9 0.909 16.7 6.1 23,233

80.6 45 2,100 58.1 22.5 17,029 68,115 2,911 12.4 510 3,341 20.4 56 80 14.4 67.1 11.1 79,790

5.97 13.3 26.7 0.909 19.5 6.2 23,378

80.6 45 2,100 58.7 21.9 16,637 66,548 3,127 13.1 510 3,557 18.7 61 85 14.4 72.0 11.0 78,961

27.0 7.2 991 14.8 12.2 4,875 14,624 19,498 5.48 16.1 29.4 0.909 22.2 6.1 23,135

80.6 46 2,100 58.8 21.8 16,542 66,166 3,351 14.0 510 3,781 17.5 66 90 14.4 77.0 11.0 79,343

27.0 7.8 991 14.9 12.1 4,847 14,540 19,386 5.13 18.9 32.2 0.909 25.0 6.1 23,247

80.6 46 2,100 60.8 19.8 15,019 60,076 3,352 14.8 510 3,790 15.9 73 95 14.4 83.2 10.2 73,256

27.0 7.8 991 16.0 11.0 4,401 13,202 17,602 4.64 22.8 35.0 0.909 28.4 5.7 21,464

80.6 47 2,100 61.0 19.6 14,894 59,575 3,577 15.7 510 4,015 14.8 78 100 14.4 88.2 10.2 73,523

27.0 8.3 991 16.1 10.9 4,364 13,092 17,455 4.35 25.6 37.8 0.909 31.2 5.7 21,542

80.6 47 2,100 61.5 19.1 14,474 57,895 3,810 16.6 510 4,248 13.6 83 105 14.4 93.1 10.1 72,639

27.0 8.3 991 16.4 10.6 4,241 12,722 16,963 3.99 28.3 40.6 0.909 33.9 5.6 21,283

80.6 48 2,100 61.7 18.9 14,310 57,239 4,057 17.6 510 4,495 12.7 88 110 14.4 98.1 10.1 72,825

27.0 8.9 991 16.5 10.5


4,193 12,578 16,771 3.73 31.1 43.3 0.909 36.7 5.6 21,338




Heating Mode

RH-75-HACW-P-1T


ELT

°F

°C

Evap.

Temp


°F USGPM °F

°C L/s °C

°F

°C

Nominal 6 ton




Watts

°F

°C

R410a 60 Hz


Cond.

Temp.

°F

°C

Air

Flow

CFM

L/s

LAT Delta T

°F

°C

Net

Output

°F BTU/Hr

°C Watts

27.0 15 16.8 22.3 4.7 36,059 775 4,419 3.34 68 94 2,400 87.4 19.4 50,553

-2.8 -9.4 1.061 -5.4 2.6 10,565

33.0 20 16.8 27.8 5.2 39,711 775 4,509 3.53

20.0 34.4 1,133 30.8 10.8 14,812

68 96 2,400 89.0 21.0 54,514

0.6 -6.7 1.061 -2.3 2.9 11,635

39.0 25 16.8 33.3 5.7 43,637 775 4,600 3.73

20.0 35.6 1,133 31.7 11.7 15,973

68 98 2,400 90.6 22.6 58,751

3.9 -3.9 1.061 0.7 3.2 12,786 20.0 36.7 1,133 32.6 12.6 17,214

45.0 30 16.8 38.7 6.3 47,847 775 4,691 3.94 68 100 2,400 92.3 24.3 63,272

7.2 -1.1 1.061 3.7 3.5 14,019 20.0 37.8 1,133 33.5 13.5 18,539

51.0 35 16.8 44.2 6.8 53,985 775 4,865 4.24 68 103 2,400 95.0 27.0 70,124

10.6 1.7 1.061 6.8 3.8 15,817 20.0 39.4 1,133 35.0 15.0 20,546

57.0 40 16.8 49.6 7.4 58,933 775 4,962 4.47 68 105 2,400 97.0 29.0 75,404

13.9 4.4 1.061 9.8 4.1 17,267 20.0 40.6 1,133 36.1 16.1 22,093

63.0 45 16.8 54.9 8.1 64,198 775 5,062 4.71 68 107 2,400 99.2 31.2 81,010

17.2 7.2 1.061 12.7 4.5 18,810 20.0 41.7 1,133 37.3 17.3 23,736

69.0 50 16.8 60.2 8.8 69,788 775 5,165 4.96 68 109 101.5 33.5 86,953

20.6 10.0 1.061 15.7 4.9 20,448


20.0 42.8 1,133 38.6 18.6 25,477


Cooling Mode

RH-75-HACW-P-1T


R410a 60 Hz


EAT

°F

°C

Evap.

Temp

°F

°C


CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts


Efficiency

ELT


Watts COPc

°F

°C

Cond.

Temp.


°F USGPM °F

°C L/s °C

°F

°C

BTU/Hr

Watts

80.6 45 2,400 58.6 22.0 19,099 76,397 3,223 13.9 880 4,046 18.9 50 75 16.8 60.8 10.8 90,402

27.0

27.0

7.2

7.8

1,133 14.8 12.2

1,133 14.8 12.2

5,596

5,576

16,788 22,384

16,729 22,305

5.53 10.0 23.9 1.061 16.0 6.0 26,487

80.6 46 2,400 58.6 22.0 19,032 76,127 3,436 14.8 880 4,259 17.9 55 80 16.8 65.8 10.8 90,856

5.24 12.8 26.7 1.061 18.8 6.0 26,621

80.6 46 2,400 59.1 21.5 18,591 74,364 3,650 15.6 880 4,473 16.6 60 85 16.8 70.7 10.7 89,824

27.0 7.8 1,133 15.1 11.9 5,447 16,341 21,788 4.87 15.6 29.4 1.061 21.5 5.9 26,318

80.6 46 2,400 59.7 20.9 18,139 72,554 3,870 16.5 880 4,693 15.5 65 90 16.8 75.6 10.6 88,765

27.0 7.8 1,133 15.4 11.6 5,315 15,944 21,258 4.53 18.3 32.2 1.061 24.2 5.9 26,008

80.6 47 2,400 59.7 20.9 18,079 72,317 3,868 17.4 880 4,718 15.3 71 95 16.8 81.5 10.5 88,523

27.0 8.3 1,133 15.4 11.6 5,297 15,892 21,189 4.49 21.7 35.0 1.061 27.5 5.9 25,937

80.6 47 2,400 60.3 20.3 17,592 70,368 4,091 18.4 880 4,941 14.2 76 100 16.8 86.4 10.4 87,336

27.0 8.3 1,133 15.7 11.3 5,154 15,463 20,618 4.17 24.4 37.8 1.061 30.2 5.8 25,589

80.6 47 2,400 60.9 19.7 17,092 68,366 4,325 19.4 880 5,175 13.2 81 105 16.8 91.3 10.3 86,130

27.0 8.3 1,133 16.0 11.0 5,008 15,023 20,031 3.87 27.2 40.6 1.061 32.9 5.7 25,236

80.6 48 2,400 61.1 19.5 16,896 67,584 4,571 20.4 880 5,421 12.5 86 110 16.8 96.3 10.3 86,189

27.0 8.9 1,133 16.2 10.8


4,951 14,852 19,802 3.65 30.0 43.3 1.061 35.7 5.7 25,253




Heating Mode

RH-80-HACW-P-1S


ELT

°F

°C

Evap.

Temp


°F Igpm °F

°C L/min °C

°F

°C

Nominal 6 ton Single Stage




Watts

°F

°C

R410a 60 Hz


Cond.

Temp.

°F

°C

Air

Flow

CFM

L/s

LAT Delta T

°F

°C

Net

Output

°F BTU/Hr

°C Watts

27.0 15 16.8 22.0 5.0 42,083 775 5,330 3.28 68 94 2,400 91.0 23.0 59,689

-2.8 -9.4 1.1 -5.6 2.8 12,330

33.0 20 16.8 27.4 5.6 46,683 775 5,413 3.50

20.0 34.4 1,133 32.8 12.8 17,489

68 96 2,400 92.8 24.8 64,569

0.6 -6.7 1.1 -2.5 3.1 13,678

39.0 25 16.8 32.9 6.1 51,567 775 5,493 3.72

20.0 35.6 1,133 33.8 13.8 18,918

68 98 2,400 94.8 26.8 69,728

3.9 -3.9 1.1 0.5 3.4 15,109 20.0 36.7 1,133 34.9 14.9 20,430

45.0 30 16.8 38.2 6.8 56,762 775 5,572 3.95 68 100 2,400 96.9 28.9 75,192

7.2 -1.1 1.1 3.5 3.8 16,631 20.0 37.8 1,133 36.1 16.1 22,031

51.0 35 16.8 43.4 7.6 63,610 775 5,761 4.21 68 103 2,400 99.9 31.9 82,807

10.6 1.7 1.1 6.3 4.2 18,638 20.0 39.4 1,133 37.7 17.7 24,262

57.0 40 16.8 48.7 8.3 69,630 775 5,838 4.47 68 105 102.3 34.3 89,090

13.9 4.4 1.1 9.3 4.6 20,401 20.0 40.6 1,133 39.0 19.0 26,103

63.0 45 16.8 53.9 9.1 76,041 775 5,912 4.75 68 107 104.8 36.8 95,754

17.2 7.2 1.1 12.2 5.0 22,280 20.0 41.7 1,133 40.5 20.5 28,056

69.0 50 16.8 59.1 9.9 82,869 775 5,983 5.04 68 109 107.6 39.6 102,826

20.6 10.0 1.1 15.1 5.5 24,280

Compressor: ZP70KWE-PFV

20.0 42.8 1,133 42.0 22.0 30,128


Cooling Mode

RH-80-HACW-P-1S


EAT

Evap.

Temp


°F

°C

°F

°C

CFM

L/s

°F

°C

°F

°C

BTU/Hr

Watts

BTU/Hr

Watts

R410a 60 Hz



Efficiency

ELT

BTU/Hr Watts Amps Watts Watts EER °F

Watts COPc °C

Cond.

Temp.


°F Igpm °F

°C L/min °C

°F BTU/Hr

°C Watts

80.6 44 2,400 55.5 25.1 86,988 3,832 50 75 16.8 62.3 12.3 103,071

27.0 6.7 1,133 13.1 13.9

80.6

27.0

45

7.2

2,400 55.5 25.1

1,133 13.1 13.9

6,372

6,369

19,116 25,487

19,108 25,477

5.47 10.0 23.9 1.060 16.8 6.8 30,200

86,954 4,073 55 80 16.8 67.4 12.4 103,857

5.20 12.8 26.7 1.060 19.7 6.9 30,430

80.6 45 2,400 56.0 24.6

27.0 7.2 1,133 13.4 13.6 6,237 18,710

85,141 4,328 60 85 16.8 72.3 12.3 102,917

24,946 4.84 15.6 29.4 1.060 22.4 6.8 30,155

80.6 45 2,400 56.6 24.0

27.0 7.2 1,133 13.7 13.3 6,095 18,286

83,213 4,598 65 90 16.8 77.1 12.1 101,907

24,381 4.50 18.3 32.2 1.060 25.1 6.7 29,859

80.6 46 2,400 56.5 24.1

27.0 7.8 1,133 13.6 13.4 6,126 18,377

83,630 4,650 71 95 16.8 83.2 12.2 102,503

24,503 4.46 21.7 35.0 1.060 28.5 6.8 30,033

80.6 46 2,400 57.1 23.5

27.0 7.8 1,133 13.9 13.1 5,964 17,891

81,415 4,941 76 100 16.8 88.1 12.1 101,283

23,855 4.12 24.4 37.8 1.060 31.1 6.7 29,676

80.6 46 2,400 57.8 22.8

27.0 7.8 1,133 14.3 12.7 5,793 17,378

79,082 5,255 81 105 16.8 92.9 11.9 100,020

23,171 3.80 27.2 40.6 1.060 33.8 6.6 29,306

80.6 47 2,400 58.0 22.6

27.0 8.3 1,133 14.5 12.5

Compressor: ZP70KWE-PFV

5,725 17,175

78,159 5,582 86 110 16.8 97.9 11.9 100,215

22,900 3.56 30.0 43.3 1.060 36.6 6.6 29,363



000821MAN-01

ELECTRICAL TABLES

Table 18 - Heat Pump Electrical Information (230-1-60)

Model Compressor Fan

RLA LRA RLA

Outdoor

Circulators

Max A

FLA MCA

Amps Amps

Max Fuse/

Breaker

Amps

Wire

Size** ga

25 11.4 4.0 18.7 21.6 30 #10-3

45 18.6 31.6 40 #8-3

55 23.6 39.3 50 #6-3

65 28.6 47.1 60 #6-3

75 30.4 50.3 60 #6-3

80 35.7 56.9 60 #6-3

* Models are single stage

** HAC models may be connected with 2 conductor cable if using 230VAC Outdoor Circulators



RLA LRA RLA

Outdoor

Circulators

Max A

FLA MCA

Amps Amps

Max Fuse/

Breaker

Amps

Wire

Size** ga

25* 8.6 55 2.5 4.0 15.9 18.1 25 #10-4

45 12.4 4.0 20.7 23.8 30 #10-4

55 15.0 5.0 24.8 28.6 40 #8-4

65 19.6 5.0 30.9 35.8 50 #8-4

75* 21.2 5.0 33.5 38.8 60 #8-4


** HAC models may be connected with 3 conductor cable if using 230VAC Outdoor Circulators



Outdoor

Circulators

Max A

FLA MCA

Max Fuse/

Breaker

Amps

Wire

Size ga RLA LRA RLA Amps Amps

25* 10.0 52 2.5 4.0 17.3 19.8 30 #10-2

45* 15.0 67 3.5 4.0 23.3 27.1 40 #8-2

55* 17.7 98 4.0 5.0 27.5 31.9 50 #6-2

65* 27.3 5.0 38.6 45.4 60 #6-2

75* 32.9 5.0 45.2 53.4 60 #6-2




RLA LRA RLA

Outdoor

Circulators

Max A

FLA MCA

Amps Amps

Max Fuse/

Breaker

Amps

Wire

Size ga

25* 4.4 23 2.5 4.0 11.7 12.8 15 #14-4

45 5.0 4.0 13.3 14.6 20 #12-4

55 7.1 5.0 16.9 18.7 25 #10-4

65 10.0 5.0 21.3 23.8 30 #10-4

75* 10.9 62 6.5 5.0 23.2 25.9 40 #8-4



ELECTRICAL DIAGRAMS (230-1-60)


ELECTRICAL DIAGRAMS (230-1-60) - continued


ELECTRICAL DIAGRAMS (230-1-60) - continued


CASE DETAILS—Left Hand Return (Size 25 to 45)

Front View

000821MAN-01

Back View


CASE DETAILS—Left Hand Return (Size 25 to 45) - continued

Left Side View

Right Side View

ISSUE 02: 08 OCT 2010

Bottom View

Page 49 000821MAN-01

CASE DETAILS—Right Hand Return (Size 25 to 45)

Front View

000821MAN-01

Back View


CASE DETAILS—Right Hand Return (Size 25 to 45) - continued



ISSUE 02: 08 OCT 2010

Bottom View

Page 51 000821MAN-01

CASE DETAILS—Left Hand Return (Size 55 to 75)

Front View

000821MAN-01

Back View


CASE DETAILS—Left Hand Return (Size 55 to 75) - continued



ISSUE 02: 08 OCT 2010

Bottom View

Page 53 000821MAN-01

CASE DETAILS—Right Hand Return (Size 55 to 75)

Front View

000821MAN-01

Back View


CASE DETAILS—Right Hand Return (Size 55 to 75) - continued



ISSUE 02: 08 OCT 2010

Bottom View

Page 55 000821MAN-01

APPENDIX A - Control Board Specifications


APPENDIX B - ECM Fan Airflow Tables

Model

25

45

55

65

75

80

CFM

800

1200

1500

1900

2100

2400

Full

NOMINAL AIRFLOW SETTING (MED)

STAGE 2

Reduced* Full

STAGE 1

Reduced*

L/s

378

566

708

897

991

1133

CFM

680

1020

1275

1615

1785

2040

L/s

321

481

602

762

842

963

CFM

680

1030

1240

1540

1660

N/A

L/s

321

486

585

727

783

N/A

CFM

578

876

1054

1309

1411

N/A

L/s

273

413

497

618

666

N/A

FAN ONLY (Recirculation)

Full Reduced*

CFM

448

672

840

1064

1176

1344

L/s

211

317

396

502

555

634

CFM

381

571

714

904

1000

1142

L/s

180

270

337

427

472

539

Model

25

45

55

65

75

80

Model

25

45

55

65

75

80

CFM

752

1128

1410

1786

1974

2256

Full

-6% AIRFLOW SETTING (LOW)

STAGE 2

Reduced* Full

STAGE 1

Reduced*

L/s

355

532

665

843

932

1065

CFM

639

959

1199

1518

1678

1918

L/s

302

453

566

716

792

905

CFM

639

968

1166

1448

1560

N/A

L/s

302

457

550

683

736

N/A

CFM

543

823

991

1230

1326

N/A

L/s

256

388

468

581

626

N/A

Full

+6% AIRFLOW SETTING (HIGH)

STAGE 2

Reduced* Full

STAGE 1

Reduced*

CFM

848

1272

1590

2014

2226

2544

L/s

400

600

750

951

1051

1201

CFM

721

1081

1352

1712

1892

2162

L/s

340

510

638

808

893

1021

CFM

721

1092

1314

1632

1760

N/A

L/s

340

515

620

770

830

N/A

CFM

613

928

1117

1388

1496

N/A

L/s

289

438

527

655

706

N/A

Full

+12% AIRFLOW SETTING (MAX)

STAGE 2

Reduced* Full

STAGE 1

Reduced*


CFM

421

632

790

1000

1105

1263

Full

L/s

199

298

373

472

522

596

Reduced*

CFM

358

537

671

850

940

1074

L/s

169

253

317

401

443

507


CFM

475

712

890

1128

1400

1425

Full

L/s

224

336

420

532

661

672

Reduced*

CFM

404

605

757

959

1190

1211

L/s

191

286

357

452

562

572

Model


Full Reduced*

25

45

55

65

75

80

CFM

896

1344

1680

2128

2352

2688

L/s

423

634

793

1004

1110

1269

CFM

762

1142

1428

1809

1999

2285

L/s

359

539

674

854

944

1078

CFM

762

1154

1389

1725

1859

N/A

L/s

359

544

655

814

877

N/A

CFM

647

981

1180

1466

1580

N/A

L/s

306

463

557

692

746

N/A

CFM

502

753

941

1192

1317

1505

NOTES: Unit sizes 25, 45 and 55 nominal value up to 0.50 inH2o, sizes 65, 75 and 80 up to 0.70inH2o

*To obtain the REDUCED airflow values use a dry contact to connect AR1 to AR2 on the terminal strip

ISSUE 02: 08 OCT 2010

INFORMATION TAKEN FROM DOCUMENT 000527INF-04

Page 57

L/s

237

355

444

562

622

710

CFM

426

640

800

1013

1120

1279

L/s

201

302

377

478

528

604

000821MAN-01

000821MAN-01

THIS PAGE INTENTIONALLY LEFT BLANK


ISSUE 02: 08 OCT 2010

THIS PAGE INTENTIONALLY LEFT BLANK

Page 59 000821MAN-01

LIMITED EXPRESS WARRANTY

It is expressly understood that unless a statement is specifically identified as a warranty, statements made by Maritime Geothermal Ltd., a corporation registered in New

Brunswick, Canada, (“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.

EXCEPT AS SPECIFICALLY SET FORTH HEREIN, THERE IS NO EXPRESS WARRANTY AS TO ANY OF MG’S PRODUCTS. MG MAKES NO WARRANTY AGAINST

LATENT DEFECTS. MG MAKES NO WARRANTY OF MERCHANTABILITY OF THE GOODS OR OF THE FITNESS OF THE GOODS FOR ANY PARTICULAR PURPOSE.

LIMITED EXPRESS RESIDENTIAL WARRANTY - PARTS

MG warrants its Residential Class products, purchased and retained in the United States of America and Canada, to be free from defects in material and workmanship under normal use and maintenance as follows:

(1) Air conditioning, heating and/or heat pump units built or sold by MG (“MG Units”) for five (5) years from the Warranty Inception Date (as defined below).

(2) Thermostats, auxiliary electric heaters and geothermal pumping modules built or sold by MG, when installed with MG Units, for five (5) years from the Warranty Inception

Date (as defined below).

(3) Sealed refrigerant circuit components of MG Units (which components only include the compressor, refrigerant to air/water heat exchangers, reversing valve body and

refrigerant metering device) for ten (10) years from the Warranty Inception Date (as defined below).

(4) Other accessories and parts built or sold by MG, when installed and purchased with MG Units, for five (5) years from the date of shipment from MG.

(5) Other accessories, when purchased separately, for (1) year from the date of shipment from MG.

The “Warranty Inception Date” shall be the date of original unit installation, as per the date on the installation Startup Record or six (6) months from date of unit shipment from MG, whichever comes first.

To make a claim under this warranty, parts must be returned to MG in Petitcodiac, New Brunswick, freight prepaid, no later than ninety (90) days after the date of the failure of the part. If MG determines the part to be defective and within MG’s Limited Express Residential Warranty, MG shall, when such part has been either replaced or repaired, return such to a factory recognized distributor, dealer or service organization, freight prepaid. The warranty on any part repaired or replaced under warranty expires at the end of the original warranty period.

LIMITED EXPRESS RESIDENTIAL WARRANTY - LABOUR

This Limited Express Residential Labour Warranty shall cover the labour incurred by MG authorized service personnel in connection with the installation of a new or repaired warranty part that is covered by this Limited Express Residential Warranty only to the extent specifically set forth in the current labour allowance schedule "A" provided by MG’s

Warranty Department and only as follows:

(1) MG Units for two (2) years from the Warranty Inception Date.

(2) Thermostats, auxiliary electric heaters and geothermal pump modules built or sold by MG, when installed with MG Units, for two (2) years from the Warranty Inception Date.

(3) Sealed refrigerant circuit components of MG Units (which components only include the compressor, refrigerant to air/water heat exchangers, reversing valve body and

refrigerant metering device) for five (5) years from the Warranty Inception Date.

Labour costs are not covered by this Limited Express Residential Warranty to the extent they exceed the amount allowed under said allowance schedule, they are not specifically provided for in said allowance schedule, they are not the result of work performed by MG authorized service personnel, they are incurred in connection with a part not covered by this Limited Express Residential Warranty, or they are incurred more than the time periods set forth in this paragraph after the Warranty Inception Date.

This warranty does not cover and does not apply to:

(1) Air filters, fuses, refrigerant, fluids, oil.

(2) Products relocated after initial installation.

(3) Any portion or component of any system that is not supplied by MG, regardless of the cause of the failure of such portion or component.

(4) Products on which the unit identification tags or labels have been removed or defaced.

(5) Products on which payment to MG, or to the owner’s seller or installing contractor, is in default.

(6) Products subjected to improper or inadequate installation, maintenance, repair, wiring or voltage conditions.

(7) Products subjected to accident, misuse, negligence, abuse, fire, flood, lightning, unauthorized alteration, misapplication, contaminated or corrosive liquid or air supply,

operation at abnormal air or liquid temperatures or flow rates, or opening of the refrigerant circuit by unqualified personnel.

(8) Mold, fungus or bacteria damage

(9) Corrosion or abrasion of the product.

(10) Products supplied by others.

(11) Products which have been operated in a manner contrary to MG’s printed instructions.

(12) Products which have insufficient performance as a result of improper system design or improper application, installation, or use of MG’s products.

(13) Electricity or fuel, or any increases or unrealized savings in same, for any reason whatsoever.

Except for the limited labour allowance coverage set forth above, MG is not responsible for:

(1) The costs of fluids, refrigerant or system components supplied by others, or associated labour to repair or replace the

same, which is incurred as a result of a defective part covered by MG’s Limited Residential Warranty.

(2) The costs of labour, refrigerant, materials or service incurred in diagnosis and removal of the defective part, or in obtaining

and replacing the new or repaired part.

(3) Transportation costs of the defective part from the installation site to MG, or of the return of that part if not covered by

MG’s Limited Express Residential Warranty.

(4) The costs of normal maintenance.

This Limited Express Residential Warranty applies to MG Residential Class products manufactured on or after February 15, 2010. MG’S LIABILITY UNDER THE TERMS OF

THIS LIMITED WARRANTY SHALL APPLY ONLY TO THE MG UNITS REGISTERED WITH MG THAT BEARS THE MODEL AND SERIAL NUMBERS STATED ON THE

INSTALLATION START UP RECORD, AND MG SHALL NOT, IN ANY EVENT, BE LIABLE UNDER THE TERMS OF THIS LIMITED WARRANTY UNLESS THIS

INSTALLATION START UP RECORD HAS BEEN ENDORSED BY OWNER & DEALER/INSTALLER AND RECIEVED BY MG LIMITED WITHIN 90 DAYS OF START UP.

Limitation: This Limited Express Residential Warranty is given in lieu of all other warranties. If, not withstanding the disclaimers contained herein, it is determined that other warranties exist, any such express warranty, including without imitation any express warranties or any implied warranties of fitness for particular purpose and merchantability, shall be limited to the duration of the Limited Express Residential Warranty.

LIMITATION OF REMEDIES In the event of a breach of the Limited Express Residential Warranty, MG will only be obligated at MG’s option to repair the failed part or unit, or to furnish a new or rebuilt part or unit in exchange for the part or unit which has failed. If after written notice to MG’s factory in Petitcodiac, New Brunswick of each defect, malfunction or other failure, and a reasonable number of attempts by MG to correct the defect, malfunction or other failure, and the remedy fails of its essential purpose, MG shall refund the purchase price paid to MG in exchange for the return of the sold good(s). Said refund shall be the maximum liability of MG. THIS REMEDY IS THE SOLE AND

EXCLUSIVE REMEDY OF THE BUYER OR PURCHASER AGAINST MG FOR BREACH OF CONTRACT, FOR THE BREACH OF ANY WARRANTY OR FOR MG’S

NEGLIGENCE OR IN STRICT LIABILITY.

LIMITATION OF LIABILITY MG shall have no liability for any damages if MG’s performance is delayed for any reason or is prevented to any extent by any event such as, but not limited to: any war, civil unrest, government restrictions or restraints, strikes, or work stoppages, fire, flood, accident, shortages of transportation, fuel, material, or labour, acts of God or any other reason beyond the sole control of MG. MG EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL

DAMAGE IN CONTRACT, FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY, OR IN TORT, WHETHER FOR MG’s NEGLIGENCE OR AS STRICT LIABILITY.

OBTAINING WARRANTY PERFORMANCE Normally, the dealer or service organization who installed the products will provide warranty performance for the owner. Should the installer be unavailable, contact any MG recognized distributor, dealer or service organization. If assistance is required in obtaining warranty performance, write or call: Maritime

Geothermal Ltd • Customer Service • PO Box 2555 • Petitcodiac, New Brunswick E4Z 6H4 • (506) 756 ‐8135 • or e-mail to [email protected] NOTE: Some states or Canadian provinces do not allow limitations on how long an implied warranty lasts, or the limitation or exclusions of consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state and from Canadian province to

Canadian province. Please refer to the MG Installation, Installation and Service Manual for operating and maintenance instructions.

000821MAN-01 ISSUE 02: 08 OCT 2010

NORDIC RH-Series 25-80 geothermal heat pump Installation and Service Manual

Assistant Bot

Installation and Service Manual

NORDIC® RH-Series

Horizontal Two-Stage R410a

Model Sizes 25-80

Horizontal Liquid to Air

Geothermal Heat Pumps

Maritime Geothermal Ltd.

P.O. Box 2555

Petitcodiac, N.B. E4Z 6H4

Ph. (506) 756-8135

Email: [email protected]

Web: www.nordicghp.com

WARNING:

WARNING:

WARNING:

CAUTION:

CAUTION:

MODEL NOMENCLATURE

Table of Contents

Tables, Diagrams and Drawings

TABLES

DIAGRAMS

DRAWINGS

Installation Information

UNIT DESCRIPTION

UNPACKING THE UNIT

ELECTRICAL CONNECTIONS

CIRCULATOR PUMP MODULE WIRING

(GROUND LOOP ONLY)

THERMOSTAT REQUIREMENTS

OPTIMUM PLACEMENT

FAN MOTOR

SAFETY CONTROLS

FAN RETURN ORIENTATION

FAN OUTLET ORIENTATION

CONTROL TRANSFORMER

DOMESTIC HOT WATER

CONNECTIONS (HACW ONLY)

Sizing and Ductwork

HEAT PUMP SIZING

DUCT SYSTEMS - GENERAL

DUCT SYSTEMS - GRILL LAYOUT

THERMOSTAT LOCATION

PLENUM HEATER (OPTIONAL)

CONDENSATE DRAIN

Ground Water System Information

GENERAL REQUIREMENTS

PLUMBING THE HEAT PUMP

PIPE INSULATION

WATER DISCHARGE METHODS

Ground Loop System Information

CIRCULATOR PUMP MODULE

DIAGRAM A - Typical P/T (Pete’s) Plug

& Thermometer Stems

FLUSHING & PURGING THE GROUND

LOOP

DIAGRAM B - Typical Purge Cart

ADDING ANTIFREEZE SOLUTION

INITIAL PRESSURIZATION

PIPE INSULATION

Startup Procedure

PRE-START INSPECTION

UNIT STARTUP

Startup Record —RH-Series Size 25-75 Two-Stage R410a

General Maintenance

GENERAL MAINTENANCE SCHEDULE

COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUNDWATER

COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUND LOOP

Troubleshooting Guide

POWER SUPPLY TROUBLESHOOTING

THERMOSTAT TROUBLESHOOTING

FAULT CODE TROUBLESHOOTING

COMPRESSOR TROUBLESHOOTING

OPERATION TROUBLESHOOTING - HEATING MODE

OPERATION TROUBLESHOOTING - HEATING MODE

OPERATION TROUBLESHOOTING - COOLING MODE

OPERATION TROUBLESHOOTING - COOLING MODE

FAN TROUBLESHOOTING