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Maritime Geothermal Ltd.
P.O. Box 413
Petitcodiac, N.B.      E0A 2H0

Maritime

Geothermal Ltd.

NORDIC® models DX-45-55-65

High Efficiency Direct Expansion

Geothermal Heat Pumps

Refrigerant Filled Copper Heat Exchanger Loop

Heat Pump System Requirements .....

Vertical Case Dimensions .........

Trouble Shooting Guide ..............

Optimum Placement ...........................

Horizontal Dimensions ...........

Electrical Schemetic .....................

Instaling DX linesets ..........................

Electrical Requirements ..........

Installer Wiring .............................

Vacuuming & Charging ...................

Component Layout ................

Plenum Heater Wiring ...................

Built-in refrigerant safety ctrls............

Performance Ratings ...............

Duct sizing Guide .......................

Theory of Operation............................

CFM available .........................

Warranty ...................................

Table of Contents

Installation

Manual

Revision 1.4 12-Feb-00

Email:[email protected]

www.discribe.ca/nordic

Содержание nordic dx-45

Страница 1: ...rouble Shooting Guide 24 Optimum Placement 7 Horizontal Dimensions 19 Electrical Schemetic 27 Instaling DX linesets 9 Electrical Requirements 20 Installer Wiring 28 Vacuuming Charging 11 Component Lay...

Страница 2: ...age 2 Maritime Geothermal Ltd 12 Feb 00 A NORDIC Direct Expansion Heat Pump System Energy Input Storage System Earth s Mass Extraction Heat Distribu NORDIC DX to Water NORDIC DX to Air HEATING COOLING...

Страница 3: ...d of installing a DX unit A high water table in the borehole area 20 to 30 ft will insure that there is adequate conduction with the earth and although the loop length per ton is shorter than the hori...

Страница 4: ...alled to pre vent the build up of pressure which may result in bursting of the circulator pump housing if the unit is operated while both valves are shut See point A marked above Nordic DX All Models...

Страница 5: ...10 times greater than a similar capacity conventional geothermal heat pump 4 Approximately 3 times as much refrigerant required in the cooling mode as is required in the heating mode 5 Lack of a prop...

Страница 6: ...nch to the basement wall Liquid lines must be insulated from the heat pump to approx 6 ft down the drop pipes in the vertical boreholes Install spacers to keep the pipes separated as far as possible f...

Страница 7: ...struction for a distance of 2 two ft so that servic ing and general maintenance can be carried out with a mini mum of difficulty Raising the heat pump off the floor a few inches is generally a good pr...

Страница 8: ...Page 8 Maritime Geothermal Ltd 12 Feb 00 Piping Layout of Vertical Style DX Heat Pump System 120 ft max 100 ft typical HOME...

Страница 9: ...above ground and entering the dwelling between the floor joists just below the first floor These pipes should be insu lated with a minimum of 3 4 of closed cell weatherproof in sulation There will be...

Страница 10: ...Page 10 Maritime Geothermal Ltd 12 Feb 00 NORDIC DX Horizontal Trench Design...

Страница 11: ...will be impossible and attempting to do so will introduce moisture to the system making the process take much longer to vacuum after the leak has been found and re paired Vacuum the system until the...

Страница 12: ...Page 12 Maritime Geothermal Ltd 12 Feb 00 NORDIC Horizontal DX Heat Pump System Plan View...

Страница 13: ...be kept below 2 inches of water total Return ducts should ideally be placed in every room and be sized 50 lar ger than corresponding supplies In some instances the num ber of floor diffusers will actu...

Страница 14: ...ld be a excavated area or an existing area which needs to be filled as part of general excavation Loops should be buried approxi mately 6 ft underground for best performance Example Nordic DX 45 shoul...

Страница 15: ...close at the same time The TX valves control the flow of liquid refrigerant to it s loop by virtue of the sensing bulbs being attached to each respective return vapor line and all the equalizer lines...

Страница 16: ...a sis as the field warms up 2 It allows the machine to switch from heating to cooling mode without shut off on it s low pressure control since refrigerant pressure is supplied to the intake of the com...

Страница 17: ...Page 17 Maritime Geothermal Ltd 12 Feb 00 NORDIC Series DX 45 55 65 Engineering and Performance Data June 1997...

Страница 18: ...binet is fully insulated with flame retardant accoustic material Supply Return Duct Sizes Basic cabinet design is the same for all DX models 45 55 65 Cold air return measures 27 x 30 5 Hot air plenum...

Страница 19: ...OOR SIZE 28 W x 31 H 1 25 1 00 31 00 1 00 4 22 4 00 3 50 3 50 4 50 7 50 5 00 5 00 33 00 17 13 6 99 RIGHT SIDE DOOR 26 07 2 50 BACK SIDE Return Air Side 19 00 Electric Box 1 00 18 00 DOOR Filter rack a...

Страница 20: ...18 18 Thermostat conductors 8 8 8 Disconnect Switch Thermostat Temperature IN F Temp OUT F Temperature Rise F of Total DX 45 Igal hr DX 55 Igal hr DX 65 Igal hr 40 150 110 20 10 11 8 14 5 45 150 105...

Страница 21: ...IN Domestic Hot Water OUT Bronze head Magneti cally driven Hot Water circulator High Low access ports Microprocessor con trolled operation Electronic thermostat Auto changeover from HEAT to COOL High...

Страница 22: ...LAT Diff Sens cooling Latent Cooling Total Cooling Comp Amps Comp Watts Blower Amps Blower Watts Total Watts EER Suct Disc Pres 50 80 2 52 7 27 5 38549 20002 58550 16 3 3490 3 4 341 3830 15 3 68 171...

Страница 23: ...0 110 6 40 8 76542 29 2 5990 4 3 415 6405 3 50 68 2 255 1 55 50459 71 108 5 38 0 70659 27 8 5721 4 2 413 6134 3 37 62 8 245 9 50 46511 70 105 7 35 7 67164 26 7 5428 4 1 414 5842 3 37 57 2 234 1 45 421...

Страница 24: ...ny Burned out motor Ohmmeter shows no resistance between common and run ter minals or between common and start terminals Note Be sure compressor overload has had a chance to reset If comp is hot this...

Страница 25: ...room comes up to tem perature Faulty low pressure ctrl Refrigerant pressure control should open on drop at approx 20 psig Control should reset automati cally Heat pump can then be restarted by resetti...

Страница 26: ...e at 120 F and open at 140 F Replace thermostat if faulty Disconnect switch open or fuse blown in electri cal supply to hot water tank Check both line and load sides of fuses If switch is open de term...

Страница 27: ...Page 27 Maritime Geothermal Ltd 12 Feb 00 NORDIC DX Series Schematic Wiring Diagram Package Unit Schemetic Shown...

Страница 28: ...rmostat sup plied C common G blower relay Y Y2 compressor R 24v hot supply L compressor lock out light O W2 reversing valve B heating mode Plenum Heater Connections use 18 4 t stat wire FF to FF in he...

Страница 29: ...ing 2 conductors con nect F and F in the heat pump s electrical box to F and F in the ple num heater A 18 4 wire Thermostat Operation The NORDIC heat pump comes sup plied with a 2 stage heating 1 stag...

Страница 30: ...20 16 x 17 16 5 x 16 5 20 1750 2000 18 8 x 40 10 x 30 12 x 24 14 x 20 16 x 17 16 5 x 16 5 22 2000 2250 20 10 x 38 12 x 30 14 x 26 16 x 22 18 x 19 18 5 x 18 5 22 2250 2600 20 10 x 38 12 x 30 14 x 26 16...

Страница 31: ...stat could put loads on the stat which would shorten it s life With the 24v signal we send only a few mili amps of current are required 2 It is impossible to for the installer to short any thing durin...

Страница 32: ...ommunica tion Port Activates loop 1 through 5 Cooling loop solenoids Soaker Hose E Emergency Heat O Reversing Valve G Blower Y Compressor R 24v Hot C Common 24vAC Low Pres Ctrl High Pres Ctrl Short Pi...

Страница 33: ...y coupled to solid state switches so that the worst malfunction in wiring etc would produce only minor damage if at all to the output section of the control board There are 12 output connections at th...

Страница 34: ...will activate followed by the blower If the system has been in the HEAT mode there will be a delay as the MODE switch timer keeps the compressor OFF for 5 minutes adjustable The compressor will start...

Страница 35: ...Page 35 Maritime Geothermal Ltd 12 Feb 00...

Страница 36: ...Data Sheet have it en dorsed by the owner and return it to Maritime Geothermal Ltd within 21 days after the installation of the unit 3 It is the responsibility of the building or general contractor to...

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