Instruction/ maintenance manual of the product DXM2 Heat Controller
Go to page of 28
Heat Controller , Inc. • 1900 Wellworth A ve. • Jackson, MI 49203 • (517)787-2100 • www .heatcontroller .com APPLICA TION, OPERA TION & MAINTEN ANCE MANU AL DXM2 Digital Heat Pump Controll.
2 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. T able of Contents DXM2 Electronic Heat Pump Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual DXM2 OVERVIEW The manufacturer’s next generation control board, DXM2, is the geothermal industry’s fi rst two-way communication.
4 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. P1 Alarm Relay Comp Relay O Y1 Y2 W G C R AL1 24Vdc EH1 EH2 P6 R C Off On JW3 A OVR ESD C R NSB AL2 JW1 Acc.
5 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual DXM2 Layout and Connections P1 Alarm Relay Comp Relay O Y1 Y2 W G C R AL1 24Vdc EH1 EH2 P6 R C Off On JW3 A.
6 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. FIELD SELECT ABLE INPUTS T est mode: T est mode allows the service technician to check the operation of the control in a timely manner .
7 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual On = Heat Pump. Off = Heat/Cool. DIP 1.4: Thermostat T ype (O/B) - Provides selection of thermostat type. Heat pump thermostats with “O” output on with Cooling or “B” output on with Heating can be selected.
8 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. SAFETY FEA TURES The following safety features are provided to protect the compressor , heat exchangers, wiring and other components from damage caused by operation outside of design conditions.
9 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual compressor run cycle. When the T est mode is active, the Fault LED will display a fault code of 5 for a L T2 fault.
10 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. Note: The compressor will have a 5-minute anti-short cycle delay at power-up. Standby/Fan Only - In Standby Mode, the compressor will be off. The selected fan output(s) and R V relay may be on if appropriate inputs are present.
11 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual will change to the appropriate Heating Stage 3 air fl ow .
12 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. air fl ow for the current operating mode. For the fi rst 30 seconds of blower operation, the target air fl ow will be 50% of the normal target air fl ow .
13 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual to the compressor output. All other heat pump operating modes will operate normally , and the accessory relay will be off in all other operating modes. Thermostat Inputs – T able 5 shows the resulting demand from differing combinations of inputs.
14 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. DXM2 Controls setback is not connected and NSB is connected to Ground “C”, then if OVR is momentarily .
15 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual DXM2 Controls T able 7: Replacement Thermistor L T1, L T2 Part Numbers Thermistor T ype T ube OD Lead Length (in.
16 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. T able 9: Nominal resistance at various temperatures DXM2 Service & Application Notes T able 8: 1% Sensor Calibration Points T emp (°F) Minimum Resistance (Ohm) Maximum Resistance (Ohm) Nominal Resistance (Ohm) 78.
17 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual Thermostat Compatibility Most all heat pump and heat/cool thermostats can be used with the DXM2 Control. For additional diagnostic capabilities, the communicating thermostat is recommended.
18 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. General T roubleshooting Basic DXM2 board troubleshooting in general is best summarized as simply verifying inputs and outputs. After this process has been veri fi ed, con fi dence in board operation is con fi rmed and the trouble must be else where.
19 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual General T o properly con fi gure and troubleshoot advanced control features, and to aid in troubleshooting basic control features, a communicating thermostat or diagnostic tool with similar capabilities should be used.
20 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. Advanced T roubleshooting and Con fi guration Information Service Mode The Service Mode provides the installer with several functions for troubleshooting, including Manual Operation, Control Diagnostics, Control Con fi guration, and Fault History .
21 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual Use the following troubleshooting fl ow chart to fi nd appropriate tr oubleshooting strategies on the following pages for the DXM2 control and most water sour ce heat pump applications.
22 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. DXM2 Wiring Diagram with Motorized Modulating W ater V alve - Optional 96B0005N62 This diagram includes typical wiring details but is not applicable to all units.
23 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual DXM2 Wiring Diagram (Standard Installation) - 96B0005N56 This diagram includes typical wiring details but is not applicable to all units. For speci fi c unit wiring, refer to the diagram or the units’ control panel.
24 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. Functional T roubleshooting CAUTION! CAUTION! Do not restart units without inspection and remedy of faulting condition.
25 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual Functional T roubleshooting (cont.) No Fault Code Shown X X No compressor operation See 'Only Fan Ope.
26 Application, Operation, & Maintenance Manual DXM2 UNIT CONTROLS Heat Controller , Inc. Symptom Ht g Clg Possible Cause Solution Insufficient Capacity/ X X Dirty filter Replace or clean Not Cool.
27 Heat Controller , Inc. DXM2 UNIT CONTROLS Application, Operation, & Maintenance Manual Notes:.
4/2012.
An important point after buying a device Heat Controller DXM2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Heat Controller DXM2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Heat Controller DXM2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Heat Controller DXM2 you will learn all the available features of the product, as well as information on its operation. The information that you get Heat Controller DXM2 will certainly help you make a decision on the purchase.
If you already are a holder of Heat Controller DXM2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Heat Controller DXM2.
However, one of the most important roles played by the user manual is to help in solving problems with Heat Controller DXM2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Heat Controller DXM2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
