Microtek MHP1-HD Installation Manual download pdf (Page 6)

6 OMRCPMICRO

Controller Layout

All major MicroTech components are mounted inside the control section side of the unit's control cabinet. The

individual components are interconnected by ribbon cables, shielded multi-conductor cables or discrete

wiring. Power for the system is provided by transformers T-2 and T-4. All field wiring must enter the control

cabinet through the knockouts provided and is terminated on field wiring terminal strips.

The standard ALR keypad/display is located inside the control cabinet for protection from the weather while

the back lit WHR and THR keypad/displays are accessible through the exterior of the control cabinet. See

Figure 2 for typical control cabinet layout.

Figure 2, Typical control cabinet layout

1 2 3 4 5 6 7 8 9 10 11 ... 87 88

Operating Manual OMRCPMICRO 1
Table of Contents 2
Introduction 3
General Description 4
Optional Sensor Packages 5
Controller Layout 6
Component Data 7
8 OMRCPMICRO 8
OMRCPMICRO 9 9
Installation and Maintenance 10
Optional sensors 11
Field Wiring 12
Digital input signals 13
Digital outputs 13
Condenser pump or fan starter 13
PC connection 14
Telephone line 14
Software Identification 15
Controller Inputs/Outputs 16
Digital inputs 17
Relay board outputs 18
OMRCPMICRO 19 19
20 OMRCPMICRO 20
OMRCPMICRO 21 21
Remote Demand Limiting 22
THR Heat/Cool Changeover 23
Soft Loading 23
Compressor Control 24
Manual Operation 25
Unit Status Modes 26
Circuit Status Modes 27
Head Pressure Control 28
OMRCPMICRO 29 29
30 OMRCPMICRO 30
Pumpdown Control 31
Safety Systems 32
Circuit Alarm Conditions 33
34 OMRCPMICRO 34
System Alarm Conditions 35
Other Conditions 36
Normal Sequence of Operation 37
Condenser control 38
Low ambient start 38
Start-Up and Shutdown 39
Powering the control panel 40
Temporary shutdown 40
Extended shutdown 41
Keypad/Display 42
Password Information 43
Keypad Key Functions 43
Item group 44
Action group 44
Menu Descriptions 45
Control menus 46
OMRCPMICRO 47 47
48 OMRCPMICRO 48
Alarm menus 49
MicroTech Keypad Directory 50
OMRCPMICRO 51 51
Table 8, Control menu 52
OMRCPMICRO 53 53
54 OMRCPMICRO 54
Table 9, Alarm menu 55
56 OMRCPMICRO 56
OMRCPMICRO 57 57
58 OMRCPMICRO 58
Microprocessor control board 59
60 OMRCPMICRO 60
ADI board 61
Erroneous pressure readings 62
Freezestat alarm condition 62
Output board 63
Testing Solid-State Relays 64
PC monitoring 65
66 OMRCPMICRO 66
OMRCPMICRO 67 67
68 OMRCPMICRO 68
OMRCPMICRO 69 69
70 OMRCPMICRO 70
OMRCPMICRO 71 71
72 OMRCPMICRO 72
OMRCPMICRO 73 73
74 OMRCPMICRO 74
OMRCPMICRO 75 75
76 OMRCPMICRO 76
OMRCPMICRO 77 77
78 OMRCPMICRO 78
OMRCPMICRO 79 79
80 OMRCPMICRO 80
OMRCPMICRO 81 81
82 OMRCPMICRO 82
OMRCPMICRO 83 83
84 OMRCPMICRO 84
OMRCPMICRO 85 85
86 OMRCPMICRO 86

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Microtek MHP1-HD Installation Manual Page 6

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