McQuay MicroTech RMC-E01A User manual

Operation Manual OM-121
Group: Controls and
Network Systems
Part Number: 578998Y-01
Date: November, 1996
© 1996 McQuay International
MicroTech® Remote Monitoring and Control Panel
Applied Rooftop and Self-contained Air Conditioning Systems
For Use With McQuay Models RPS, RFS, RCS, RDT, RHS, RWS, RAH, SWP & SWT

OM-121 3
Contents
Contents.......................................................................................................................................... 3
Figures............................................................................................................................................ 4
Tables............................................................................................................................................. 4
Introduction.................................................................................................................................... 5
Software ID..................................................................................................................................... 6
Software Compatibility................................................................................................................ 6
GETTING STARTED .................................................................................................................. 8
Using the Keypad/Display............................................................................................................... 8
Menu Structure ........................................................................................................................... 9
Display Format.......................................................................................................................... 10
Password Protection .................................................................................................................. 11
Keypad Functions...................................................................................................................... 11
Changing the Keypad-Controller Interface................................................................................ 13
Keypad/Display Exercises ......................................................................................................... 13
Keypad/Display Menu Reference................................................................................................... 15
Status Menus............................................................................................................................. 15
Control Menus .......................................................................................................................... 16
Alarm Menus............................................................................................................................ 21
RMC and Unit Controller Setup.................................................................................................... 23
Setting Up the RMC Controller................................................................................................. 23
Setting Up the Unit Controllers................................................................................................. 25
OPERATOR’S GUIDE............................................................................................................... 27
Scheduling.................................................................................................................................... 27
Setting Time and Date............................................................................................................... 28
Assigning an RMC Schedule..................................................................................................... 28
Daily Scheduling....................................................................................................................... 29
Holiday Scheduling................................................................................................................... 30
Alarm Monitoring......................................................................................................................... 31
About Alarms............................................................................................................................ 31
Displaying Alarms .................................................................................................................... 32
Clearing Alarms........................................................................................................................ 32
Setting Up the Alarm Horn ....................................................................................................... 33
DESCRIPTION OF OPERATION............................................................................................. 34
Multiple-Unit Control Features ..................................................................................................... 34
Assigning Units to Groups ........................................................................................................ 34
Common Control Temperature Source ...................................................................................... 35
Common Duct Static Pressure Control ...................................................................................... 37
MICROTECH DDC FEATURES .............................................................................................. 41
Change-and-Wait Algorithm......................................................................................................... 41
About Change-and-Wait............................................................................................................ 41
Description of Operation........................................................................................................... 41
Adjusting Change-and-Wait Parameters.................................................................................... 43

4OM-121
Figures
Figure 1. Keypad/Display Board......................................................................................................9
Figure 2. Keypad Accessible Menu Structure.................................................................................10
Figure 3. LCD Display Format.......................................................................................................11
Figure 4. Keypad ...........................................................................................................................11
Figure 5. Daily Schedule Fields .....................................................................................................29
Tables
Table 1. MicroTech Unit Controller Installation Literature..............................................................5
Table 2. MicroTech Unit Controller Operation Literature................................................................5
Table 3. Program Code RMC-E01A Software Compatibility............................................................7
Table 5. Control Menus.................................................................................................................18
Table 6. Alarm Menus...................................................................................................................22
Table 7. Programmable Parameters................................................................................................23
Table 8. Scheduling Parameters.....................................................................................................25
Table 9. Programmable Parameters................................................................................................28
Table 10. Programmable Parameters..............................................................................................28
Table 11. Programmable Parameters..............................................................................................29
Table 12. Programmable Parameters..............................................................................................30
Table 13. Setting Up the Alarm Horn Programmable Parameters...................................................33
Table 14. Assigning Units to Groups Programmable Parameters....................................................34
Table 15. Common Control Temperature Source Programmable Parameters..................................35
Table 16. Heat/Cool Parameters: VAV & CAV-DTC Units ...........................................................36
Table 17. Heat/Cool Parameters: CAV-ZTC Units.........................................................................36
Table 18. Programmable Parameters..............................................................................................37
Table 19. Duct Static Pressure Parameters .....................................................................................38
Table 20. Change-and-Wait Controlled Variables and Set points for RMC Panel Control Strategies42
McQuay, MicroTech, and RoofPak are registered trademarks of McQuay International.
Monitor and Open Protocol are trademarks of McQuay International.

OM-121 5
Introduction
This manual provides information about the MicroTechRemote Monitoring and Control (RMC)
Panel for McQuay RoofPakapplied rooftop systems and McQuay self-contained air conditioning
(SCAC) systems. It specifically describes the RMC Panel’s features, sequences of operation, and
programmable options. It also includes information on how to use the keypad/display to enter and
display data.
For information on MicroTech components, field wiring options and requirements, network
commissioning procedures, and service procedures, refer to Bulletin No. IM 444, MicroTech
Remote Monitoring and Control Panel. For specific information about the MicroTech unit
controllers, refer to the appropriate MicroTech unit controller installation or operation manual (see
Table 1 and Table 2).
Table 1. MicroTech Unit Controller Installation Literature
Unit Type Installation & Maintenance Data Bulletin Number
Applied Rooftop IM 483
SCAC IM 608
Table 2. MicroTech Unit Controller Operation Literature
Unit Type Unit Control Configuration Operation Manual Bulletin Number
Applied Rooftop Variable Air Volume OM 108
Constant Air Volume, Zone Temperature Control OM 109
Constant Air Volume, Discharge Temperature Control OM 110
SCAC Variable Air Volume & Constant Air Volume, Discharge
Temperature Control OM 123
Constant Air Volume, Zone Temperature Control OM 124
!
WARNING
Electric shock hazard.
Can cause personal injury or equipment damage.
This equipment must be properly grounded. Connections and service to the MicroTech control
panel must be performed only by personnel that are knowledgeable in the operation of the
equipment being controlled.
NOTICE
This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with this instruction manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his or her own
expense. McQuay International disclaims any liability resulting from any interference or
for the correction thereof.

6OM-121
Software ID
MicroTech RMC controller software is factory installed and tested in each panel prior to shipment.
The software is identified by a program code (also referred to as the “Ident”), which is printed on a
small label affixed to the MCB. The program code is also encoded in the controller’s memory and is
available for display on menu 16 of the keypad/display or a PC equipped with MicroTech Monitor™
software. (Information on using the keypad/display is included in the “Getting Started” portion of
this manual.) Using menu 16 or Monitor software is the most reliable way of determining the
controller’s program code.
RMC controller program codification is as follows:
RMC Panel
English units
Version (numeric)
Version revision (zero then alphabetical)
RMC-E01A
If the RMC Panel’s program code does not match the format shown above, it is likely that a special
program has been loaded into the controller. In this case, some of the information in this manual
may not be applicable.
Software Compatibility
At the time of this writing, the program code for RMC Panel software is RMC-E01A. In its default
configuration, this software is not compatible with some earlier versions of MicroTech applied
rooftop and SCAC controller software. The current software compatibility for the default
configuration is summarized in Table 3. The wildcard character ([) can be zero or any letter.
If you want to use an RMC Panel with older units that have incompatible software, the unit
controller software must be upgraded. However, there is one exception: If the units are older applied
rooftop units that have incompatible software and they do not need the RMC Panel’s common duct
static pressure control feature, you can either (1) upgrade the unit controller software or (2) set the
RMC controller’s Configuration parameter to “ALL RTU.” Note that when the Configuration
parameter is set to “ALL RTU,” the RMC controller’s software will become compatible with all
applied rooftop software and incompatible with all SCAC software. See the “RMC and Unit
Controller Setup” section of this manual for information on how to change the software
configuration.
If you have a version of applied rooftop or SCAC software that is later than the compatible
programs shown in Table 3, it is likely that program RMC-E01A is compatible with it; however, it
may not be. To find out for sure, contact McQuayService.

OM-121 7
Table 3. Program Code RMC-E01A Software Compatibility
Unit Application Unit Type Compatible Programs Incompatible Programs
VAV, using the RMC Panel’s common
duct static pressure control feature Applied Rooftop 950164-040 950164 03[and earlier
950314-020 950314-01[
950162-040 950162-03[and earlier
950313-020 950313-01[
SCAC 950600-02C 950600-02B and earlier
VAV, not using the RMC Panel’s common
duct static pressure control feature; CAV,
all applications
Applied
Rooftop 950164-03J to -03K950164-040 ¬950164 03I and earlier
950314-01G to -01H950314-020 ¬950314 01F and earlier
950162-03J to -03K950162-040 ¬950162 03I and earlier
950313-01F to -01G950313-020 ¬950313 01E and earlier
950163-03H to -03J950163-040 ¬950163 03G and earlier
950315-01E to -01F950315-020 ¬950315 01D and earlier
950166-03G to -03H950166-040 ¬950166 03F and earlier
950316-01E to -01F950316-020 ¬950316 01D and earlier
SCAC 950600-020 to -02C 950600 01[
Notes:
1. These applied rooftop programs can be made compatible with RMC-E01A by setting the RMC Panel’s Configuration parameter
to “ALL RTU.”

8OM-121
Getting Started
The MicroTech Remote Monitoring and Control (RMC) Panel is a self-contained device that is
capable of monitoring and controlling up to eight McQuay applied rooftop or self-contained air
conditioning (SCAC) units via network communications. You can display and modify information
in the RMC Panel and its associated unit controllers with either of the following methods:
• Using the keypad/display at the RMC Panel
• Using an optional PC equipped with Monitor software
You can also use the keypad/display at each unit, but then your access will be limited to that unit
only.
The following “Getting Started” sections describe how to use the RMC Panel’s keypad/display. (A
unit controller’s keypad/display operates similarly; the main difference is that the special keystroke
combination that changes the keypad-controller interface is not available.) For information on using
the optional Monitor software package, see the user’s manual supplied with the Monitor software.
The last “Getting Started” section describes how to set up the RMC Panel and its associated units
for normal operation.
Note: As used throughout this manual, the term “RMC network” denotes the RMC Panel and its
associated units; it would not include, for example, a reciprocating chiller that is on the same
MicroTech network. Therefore, an “RMC net work” could be either a self-contained network
(typical) or a part of a larger MicroTech network.
Using the Keypad/Display
The Keypad/Display Board, shown in Figure 1, is provided with the RMC Panel and all MicroTech
applied rooftop and SCAC unit controllers. With the keypad/display you can monitor operating
conditions, system alarms, control parameters, and schedules. After the password has been entered,
you can edit set points, parameters, and schedules.
The keypad/display on the RMC Panel can emulate each unit’s keypad/display. Once the RMC
Panel’s keypad/display is interfaced to the desired unit controller, it operates almost exactly the
same as the unit-mounted keypad/display. The only difference is that a unit’s service mode cannot
be changed from the RMC Panel. (A special keystroke combination changes the keypad-controller
interface). The Unit Selection LEDs on the panel face indicate which controller the keypad/display
is currently interfaced with.
Note: The fact that the service mode cannot be changed is not always true. This is not true for older
versions of applied rooftop programs.

OM-121 9
Figure 1. Keypad/Display Board
1.RMC Status
Schedule#1= Occ
CONTROL
STATUS
SWITCH
ALARMS
CATEGORY
NEXT
PREV.
NEXT
PREV.
ENTER
CLEAR
MENU ACTIONITEM
DECR.
INCR.
Menu Structure
The keypad accessible information in the MicroTech controller is organized in a menu structure to
provide quick access. As shown in Figure 2, this structure is divided into three levels: categories,
menus, and items. The category, which is the highest level in the structure, can be “Status,”
“Control,” or “Alarm.” The name of each category describes the basic purpose of the menus it
contains. Complete information on the contents of each menu is included in the following
“Keypad/Display Menu Reference” section.

10 OM-121
Figure 2. Keypad Accessible Menu Structure
Status Menu 1
Menu 3 Item 1
Item 2
Item 4
Control Menu 4
Item 1
Item 2
Item 14
Menu 16
Item 1Menu 17Alarm
Menu 19
Category Menu Item
Item 1
Item 2
Item 4
Item 1
Item 2
Item 8
Item 1
Item 2
Item 4
Status Category
Menus in the Status category contain information about the current operation of the RMC controller
and its multiple-unit control groups (if any). The fields in these menu items provide status
information only and cannot be changed with the keypad. The Status category menus are
summarized in Table 4. Status.
Control Category
Menus in the Control category contain set points and parameters that define how the RMC
controller operates. After the password is entered, most fields in these menu items can be changed
with the keypad. The Control category menus are summarized in Table 4.
Alarm Category
Menus in the Alarm category contain current and previous alarm information. The Alarm category
menus are summarized in Table 5.
Display Format
The information stored in the RMC controller’s menu structure can be viewed on the 2-line by 16-
character LCD display. As shown in Figure 3, the current menu is displayed on the top line and the
current item is displayed on the bottom line. The item line contains one or more fields that convey
varying information.

OM-121 11
Figure 3. LCD Display Format
10. Schedule #1
Sun 00:00-00:00
Menu Line
Item Line
Field
Password Protection
The MicroTech controller includes password protection to guard against the entry of inadvertent
changes. When you attempt to change the value of an adjustable parameter with the keypad, the
controller prompts you to enter the password. If the correct password is entered, the controller will
allow you to make changes as desired. Five minutes after the last keystroke is made, the controller
will disallow further changes until the password is re-entered.
The keypad password for all controllers is the following keystroke sequence: ENTER, ENTER, ENTER,
ENTER. It is not adjustable. See “Keypad Functions” below for more information.
Keypad Functions
The MicroTech controller’s keypad consists of 12 pressure sensitive membrane switches, which are
divided into 4 groups: “Category,” “Menu,” “Item,” and “Action.” See Figure 4. Following are
descriptions of these groups and the keys they contain.
Figure 4. Keypad
CONTROL
STATUS
SWITCH
ALARMS
CATEGORY
NEXT
PREV.
NEXT
PREV.
ENTER
CLEAR
MENU ACTIONITEM
DECR.
INCR.
Category Group
Acting like bookmarks in the menu structure, the keys in the Category group provide quick access to
the desired menus. By using these keys, you can minimize scrolling between menus with the keys in
the Menu group (see below). Refer to Figure 2.
Status Key: Any time the STATUS key is pressed, the first menu in the Status category is displayed.
This is menu 1, “RMC Status.”
Control Key: Anytime the CONTROL key is pressed, the first menu in the Control category is
displayed. This is menu 4, “Group Assign.”
Alarms Key: Any time the ALARMS key is pressed, the first menu in the Alarm category is
displayed. This is menu 17, “Units w/Alarm.” Note that when an alarm occurs, the display will
automatically switch to the “Units w/Alarm” menu. You can then use the SWITCH key to return the
display to whichever menu and item it was at before the alarm occurred.
Switch Key: The SWITCH key toggles the display between associated Status and Control category
menu items. It allows you to quickly check a controlled condition against its set point. For example,
by pressing SWITCH when the Group #1 static pressure is being displayed (“Group #1=” item under