McQuay MicroTech UV1S2 Series User manual

Open Protocol Data Information Packet Version 2.2
Group: Controls
Date: April 1996
© 2002 McQuay International
MicroTech®
Unit Ventilator
Open Protocol™Data Communications

MicroTech Unit Ventilator Open Protocol 2
- C O N F I D E N T I A L -
This Document may not be copied or reproduced in any way without the express written consent of
McQuay International.
NOTICE
Copyright © 1996
McQuay International, Minneapolis MN
All rights reserved throughout the world.
McQuay International reserves the right to change any information contained herein without prior
notice. No guarantees are given as to the accuracy of information provided.

3MicroTech Unit Ventilator Open Protocol
Contents
Revision History ................................................................................................................................... 4
Version 2.2 ........................................................................................................................................ 4
Overview.................................................................................................................................5
Functional Goals of the Open Protocol for Unit Ventilators ................................................................5
Introduction to Open Protocol Network Configuration ........................................................................ 6
OPM - Open Protocol Master Panel ....................................................................................8
Variables ............................................................................................................................................... 8
Configurations .......................................................................................................................9
Heating and Cooling Types................................................................................................................... 9
Programs ............................................................................................................................................... 9
Heat Pump Unit Ventilators .............................................................................................................. 9
DX Cooling Unit Ventilators ............................................................................................................ 9
Chilled Water Unit Ventilators ......................................................................................................... 9
Heating Only Unit Ventilators ........................................................................................................ 10
Cooling Only Unit Ventilators ........................................................................................................ 10
Summary for Unit Ventilator Model Descriptions.......................................................................... 10
Inputs & Outputs .................................................................................................................12
Common Inputs and Outputs .............................................................................................................. 12
UV1***............................................................................................................................................... 13
UV2***............................................................................................................................................... 13
UV3***............................................................................................................................................... 14
UV4***............................................................................................................................................... 14
UV5***............................................................................................................................................... 15
UV6***............................................................................................................................................... 15
UV7***............................................................................................................................................... 16
Description of Operation ....................................................................................................17
Control Temperature ........................................................................................................................... 17
Unoccupied Heating (Night setback) .................................................................................................. 17
Unoccupied Cooling (Night Setup)..................................................................................................... 17
Occupied Heating................................................................................................................................ 17
Occupied Cooling ............................................................................................................................... 18
Damper Control................................................................................................................................... 19
Electric Heat Control........................................................................................................................... 20
Variables...............................................................................................................................21
Unit Ventilator Read Only Memory Locations................................................................................... 21
Unit Ventilator Read and Write Memory Locations ........................................................................... 25
Unit Ventilator Simulation Package...................................................................................26
Required Development Testing Tools................................................................................................. 26
Set-up of Hardware for Testing .......................................................................................................... 26
Procedure for setting up the Network for Testing........................................................................... 26
Glossary of Terms ...............................................................................................................28
Index .....................................................................................................................................29

MicroTech Unit Ventilator Open Protocol 4
Revision History
Version 2.2
This is a general upgrade and format change.
Version 2.1
•For all memory locations, added Unit Ventilator Model information since not all memory
locations are applicable to all models.
•Added missing locations:
Chilled Water Valve Position
Face & Bypass Damper Position
Hot Water Valve Position
•Removed Tenant Override Switch from the Read Only section. This memory location was
erroneously included in both the "Read Only" and the "Read and Write" sections.
•The Water Out Temperature for Models 2 and 3 has been deleted and replaced with a
refrigerant Suction Line Temperature.
•Corrected math errors in determining Run Hours and Compressor Starts.
•Corrected explanation for Mixed Air Temp, previous documentation indicated that when the
sensor was not present, the value of the memory location would be 255, this was corrected to
read 254.
•Added a summary for Unit Ventilator Model Descriptions.
•Updated all references to software program identifications to reflect current software versions.

5MicroTech Unit Ventilator Open Protocol
Overview
Functional Goals of the Open Protocol for Unit Ventilators
The McQuay International Open Protocol™for unit ventilators allows other automation integrators
the ability to communicate to a network of unit ventilators and obtain useful operating information
via communication "reads" from the controller. In addition, remote control of the unit ventilator is
possible by "writes" to the controller of new setpoints and commands.
The result of the Open Protocol can be summarized as follows:
Reading of the following operational information:
•Room Temperature
•Discharge Air Temp.
•Outdoor Air Temp.
•Mixed Air Temp.
•Water In Temp (For WSHP Units)
•Suction Line Temp (for WSHP Units)
•Outdoor Air Damper Position
•Hot Water or Steam Valve Position (When applicable)
•Chilled Water Valve Position (When applicable)
•Current Electric Heat Stage 1 -3 (When applicable)
•Current Mode : Occupied or Unoccupied
•Mode: Heat or Cool
•Current Fault - 15 unique possible codes
•Compressor Output Status - On/Off
•No. of Compressor Starts
•Tenant Override Switch Status
•Supply Fan Status - On/Off
•Supply Fan Hours
•Face & Bypass Damper Position
•Current (Active) Heat/Cool Setpoints
•Tenant Room Setpoint Adjustment Pot(-3°F to 3°F)
•Outdoor Air Damper Position Setpoint
•Outdoor Air Damper Minimum Position Setpoint
•Face & Bypass Damper Position Setpoint
Control of the Unit Ventilator:
•Ability to set time schedule as Occupied or Unoccupied
•Ability to set the active (current) Heating setpoint.
•Ability to set the active (current) Cooling setpoint.
•Ability to clear active Fault conditions.
•Ability to set a tenant override duration (request for after hour cooling or heating).
•Communications Status.

MicroTech Unit Ventilator Open Protocol 6
Introduction to Open Protocol Network Configuration
This section will be used to explain how the McQuay®Unit Ventilator Open Protocol Network
works so that the correct equipment and program can be chosen to communicate through
MicroTech®Open Protocol.
There are two (2) types of controllers that are used to make an Open Protocol Unit Ventilator
Network. They are the Open Protocol Master (OPM) and the Unit Ventilators (UV's).
Open Protocol
Master
Unit
Ventilator
Unit
Ventilator
Level 1
Level 2
The OPM provides a single communications port entry into the McQuay Unit Ventilator network.
The OPM panel consists of an EnergyLine model 120 controller. The automation integrator
connects to Comm port A, which will be pre configured for RS-232, 9600 baud. Port A is the
automation control integrator's Open Protocol communications port. Comm port B is a daisy
chained, multi-drop, 9600 baud RS-485 proprietary McQuay International protocol.
The main function of the OPM is to provide network communication interface for up to 64 Unit
Ventilator controllers.
The unit ventilator controller is factory mounted. The unit controller replaces all controls with pre-
programmed, pre-engineered and pre-tested stand-alone control. There is one controller for each unit
ventilator.
In addition to this hardware, McQuay's Unit Ventilator Open Protocol Monitor Software package is
needed. This software is used to configure, commission, and troubleshoot the McQuay
communications system. The software contains diagnostic routines which can be used to
troubleshoot the McQuay network.
This software is MS-DOS compatible to be used in all IBM PC's or 100% true compatibles.
The Monitor Software is installed in the IBM or compatible PC, and the PC is connected to the OPM
port "A" as shown:

7MicroTech Unit Ventilator Open Protocol
Open Protocol
Master
Unit
Ventilator
Unit
Ventilator
Level 1
Level 2
Etc.
Monitor Software
PC
Port A
Port B
Port B Port B
Once the McQuay communication network has been commissioned and is functional, the
temperature control vendor can disconnect the monitor PC and connect a communicating device
from the Building Automation System (BAS) Integrator's network.
When the BAS Integrators communicating device is connected to the OPM panel the
communications configuration is as follows:
Open Protocol
Master
Unit
Ventilator
Unit
Ventilator
Level 1
Level 2
Etc.
Port A BAS
Communications
Device
Port B
Port B Port B
As mentioned earlier, the unit ventilator controller is a stand-alone device. In other words, the unit
vent will continue to operate when communication is lost. However, the network must be intact for
read and write requests from the BAS communication device to be passed along to the unit
ventilators.
If communication to the Unit Ventilators is lost, the Unit Ventilators will default to occupied mode,
and the setpoints used for heating, cooling, and minimum Outdoor air damper position will be
determined by the hardware potentiometers on the Unit Ventilator MicroTech controller.

MicroTech Unit Ventilator Open Protocol 8
OPM - Open Protocol Master Panel
Variables
This is the only memory location that will be able to be read in the Open Protocol Master Panel. It
is used to see if the OPM is powered, communicating, and the applications code is intact.
Open Protocol Master Status 0400
This is the status of the OPM. When looking at this address, it will have a number from 0 to 255.
0 - 254 Running
255 Not Running

9MicroTech Unit Ventilator Open Protocol
Configurations
Heating and Cooling Types
Unit Ventilators come in many configurations. They can be self contained or split. If they are split,
the supply fan and coil section are floor mounted or ceiling mounted with the condenser section
remotely mounted outside. The condenser section includes a compressor, condenser coil, fan and
reversing valve.
There are several types of cooling and these include:
•Direct Expansion
•Chilled Water
•Water Source Heat Pump
There are several types of heating and these include:
•Electric
•Hot Water/Steam
•Water Source Heat Pump
•Air to Air Heat Pump
Programs
There are seven (7) different unit ventilator programs that are used to control the many different
styles and heating/cooling type configurations. The proper program and unit configuration is
downloaded and tested at the factory. The different types and configurations are listed below with
the program code number in parenthesis.
AE = air source heat pump. (self contained)
AT = ceiling mounted water source heat pump. (self-contained)
AR = wall mounted water source heat pump. (self- contained)
AZ = DX cooling. (self contained)
AH = ceiling mounted. (split)
AV = floor mounted. (split)
Heat Pump Unit Ventilators
AE, AV/AH ASHP w/ Electric Heat - ASHP (UV1S2*)
AR/AT WSHP with Electric Heat - WSHP (UV2S2*)
AR/AT WSHP w/o Electric Heat - WSHP (UV2S2*)
DX Cooling Unit Ventilators
AZ, AV/AH DX with Electric Heat (UV3S2*)
AZ, AV/AH DX/wet Heat, Valve Control (UV4S2*)
AZ, AV/AH DX/wet Heat, Damper Control (UV4S2*)
Chilled Water Unit Ventilators
AV/AH 2-pipe, Valve Control (UV5S2*)
AV/AH 2-pipe, Damper Control (UV5S2*)
AV/AH 4-pipe, Valve Control (UV6S2*)
AV/AH 4-pipe, Damper Control (UV6S2*)
AV/AH CW/El Ht, Valve Control (UV7S2*)
AV/AH CW/El Ht, Damper Control (UV7S2*)
Cooling Types
Heating Types

MicroTech Unit Ventilator Open Protocol 10
Heating Only Unit Ventilators
AV/AH Electric Heat only (UV3S2*)
AV/AH HW/Steam, Valve Control (UV5S2*)
AV/AH HW/Steam, Damper Control (UV5S2*)
Cooling Only Unit Ventilators
AZ, AV/AH DX w/o Electric Heat (UV3S2*)
AV/AH CW only, Valve Control (UV7S2*)
AV/AH CW only, Damper Control (UV7S2*)
Summary for Unit Ventilator Model Descriptions
Mode
l
Program
ID
Unit Type Description
0UV1*** AE/AV/AH w/Electric Heat Air Source Heat Pump w/electric heat
2UV2*** AR/AT w/Electric Heat Water Source Heat Pump w/electric
heat.
3UV2*** AR/AT Water Source Heat Pump Only.
4UV3*** AV/AH, AZ w/Electric Heat DX cooling unit w/Electric Heat
5UV3*** AV/AH DX Only DX cooling unit only
6UV3*** AV/AH w/Electric Heat Only Electric Heat only.
7UV4*** AZ/AV/AH Wet Heat, Valve
Control
DX cooling unit w Stream or Hot Water
Heat
8UV4*** AZ/AV/AH Wet Heat, Damper
Control
DX cooling unit w Stream or Hot Water
Heat
9UV5*** AV/AH Wet Heat Only, Valve
Control
Steam or Hot Water Heating Only
10 UV5*** AV/AH Wet Heat Only, Damper
Control
Steam or Hot Water Heating Only
11 UV5*** AV/AH 2 Pipe, Valve Control Chilled Water Cooling and Hot Water
Heating (2 Pipe)
12 UV5*** AV/AH 2 Pipe, Damper Control Chilled Water Cooling and Hot Water
Heating (2 Pipe)
13 UV6*** AV/AH 4 Pipe, Valve Control Chilled Water Cooling and Steam or
Hot water heating.
14 UV6*** AV/AH 4 Pipe, Damper Control Chilled Water Cooling and Steam or
Hot water heating.
15 UV7*** AV/AH CW Only, Valve Control Chilled Water Cooling Only.
16 UV7*** AV/AH CW Only, Damper
Control
Chilled Water Cooling Only.
17 UV7*** AV/AH CW, Elect Heat, Valve
Control
Chilled water Cooling and Electric
Heat.
18 UV7*** AV/AH CW, Elect Heat, Damper
Control
Chilled water Cooling and Electric
Heat.