McQuay MicroTech UV5S2 Series Protocol Manual

McQuay
Brand
McQuay
Model
MicroTech UV5S2 Series
Type
Protocol Manual

This manual is also suitable for

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.
3 MicroTech 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.
5 MicroTech 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:
7 MicroTech 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
9 MicroTech 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
0 UV1*** AE/AV/AH w/Electric Heat Air Source Heat Pump w/electric heat
2 UV2*** AR/AT w/Electric Heat Water Source Heat Pump w/electric
heat.
3 UV2*** AR/AT Water Source Heat Pump Only.
4 UV3*** AV/AH, AZ w/Electric Heat DX cooling unit w/Electric Heat
5 UV3*** AV/AH DX Only DX cooling unit only
6 UV3*** AV/AH w/Electric Heat Only Electric Heat only.
7 UV4*** AZ/AV/AH Wet Heat, Valve
Control
DX cooling unit w Stream or Hot Water
Heat
8 UV4*** AZ/AV/AH Wet Heat, Damper
Control
DX cooling unit w Stream or Hot Water
Heat
9 UV5*** 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.
11 MicroTech Unit Ventilator Open Protocol
Program naming convention: UV1S2*
•
UV = Unit Ventilator
•
1 = Program Type (1 - 7)
•
S = Standalone (Open Protocol) Software
•
2 = Software Version
•
= Software Revision (A,B,C...)
To find out what program resides in the controller, read addresses 800A through 800F in ASCII.
These 6 memory locations contain the software program identification (IDENT).
Reading ID's
MicroTech Unit Ventilator Open Protocol 12
Inputs & Outputs
Common Inputs and Outputs
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2.
3. Outdoor Air Temperature 3.
4. Mixed Air Temperature 4.
5. 5.
6. 6.
7. 7.
8. 8.
9.
10.
11.
12. Day-night changeover device
13.
14.
15.
Optional inputs and outputs:
Offset/Tenant Override
Mixed Air Temperature
Day-night changeover
13 MicroTech Unit Ventilator Open Protocol
UV1***
Air Source Heat Pump Unit Ventilators
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Compressor On/Off
3. Outdoor Air Temperature 3. Reversing Valve On/Off
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. 5. Outdoor Air Damper Close
6. 6. Heating Stage 1 On/Off
7. Outdoor Air Damper Position 7. Heating Stage 2 On/Off
8. Brownout 8. Heating Stage 3 On/Off
9.
10.
11.
12. Day-night changeover device
13. Defrost/Emergency Heat
14. High Refrigeration Pressure
15. Low Temperature
UV2***
Water Source Heat Pump Unit Ventilators
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Compressor On/Off
3. Outdoor Air Temperature 3. Reversing Valve On/Off
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. Water In Temperature 5. Outdoor Air Damper Close
6. Suction Line Temperature 6. Heating Stage 1 On/Off
7. Outdoor Air Damper Position 7. Heating Stage 2 On/Off
8. Brownout 8. Heating Stage 3 On/Off
9.
10.
11.
12. Day-night changeover device
13. Emergency Heat
14. High Refrigeration Pressure
15. Low Temperature
MicroTech Unit Ventilator Open Protocol 14
UV3***
Unit Ventilators with DX cooling and electric heat
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Compressor
3. Outdoor Air Temperature 3.
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. 5. Outdoor Air Damper Close
6. 6. Heating Stage 1 On/Off
7. Outdoor Air Damper Position 7. Heating Stage 2 On/Off
8. Brownout 8. Heating Stage 3 On/Off
9.
10.
11.
12. Day-night changeover device
13. Vent Control
14. High Refrigeration Pressure
15. Low Temperature
UV4***
Unit Ventilators with DX cooling and hot water/steam heat.
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Compressor On/Off
3. Outdoor Air Temperature 3.
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. Water In Temperature 5. Outdoor Air Damper Close
6. F&B Damper/Htg Valve Position 6. Htg Valve Close/F&B Forward
7. Outdoor Air Damper Position 7. Htg Valve Open/F&B Reverse
8. Brownout 8. End of Cycle Valve On/Off
9.
10.
11.
12. Day-night changeover device
13. Vent Control
14. High Refrigeration Pressure
15. Low Temperature
15 MicroTech Unit Ventilator Open Protocol
UV5***
Unit Ventilators with 2 pipe chilled water cooling & hot water/steam heat
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Cooling Valve Open
3. Outdoor Air Temperature 3. Cooling Valve Close
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. Water In Temperature 5. Outdoor Air Damper Close
6. F&B Damper/Valve Position 6. Valve Close/F&B Forward
7. Outdoor Air Damper Position 7. Valve Open/F&B Reverse
8. 8. End of Cycle Valve On/Off
9.
10.
11.
12. Day-night changeover device
13. Vent Control
14.
15. Low Temperature
UV6***
Unit Ventilators with 4 pipe chilled water cooling and hot water/steam heat.
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Cooling Valve Open
3. Outdoor Air Temperature 3. Cooling Valve Close
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. Water In Temperature 5. Outdoor Air Damper Close
6. F&B Damper/Htg Valve Position 6. Htg Valve Close/F&B Forward
7. Outdoor Air Damper Position 7. Htg Valve Open/F&B Reverse
8. 8. End of Cycle Valve On/Off
9.
10.
11.
12. Day-night changeover device
13. Vent Control
14.
15. Low Temperature
MicroTech Unit Ventilator Open Protocol 16
UV7***
Unit Ventilators with 4 pipe chilled water cooling and electric heat
Inputs Outputs
0. Offset/Tenant Override 0. Status LED
1. Room Temperature 1. Supply Fan On/Off
2. Discharge Air Temperature 2. Cooling Valve Open / EOC Valve
3. Outdoor Air Temperature 3. Cooling Valve Close
4. Mixed Air Temperature 4. Outdoor Air Damper Open
5. Water In Temperature 5. Outdoor Air Damper Close
6. F&B Damper/Htg Valve Position 6. Heating Stage 1 / F&BP Damper
7. Outdoor Air Damper Position 7. Heating Stage 2 / F&BP Damper
8. 8. Heating Stage 3
9.
10.
11.
12. Day-night changeover device
13. Vent Control
14.
15. Low Temperature
17 MicroTech Unit Ventilator Open Protocol
Description of Operation
Control Temperature
Following is a general description of operation. A more detailed description of operation is included
in the Installation and Maintenance manual.
Note that the control temperature for Unit ventilator is continually calculated by the MicroTech
controller during occupied mode using the following equation:
Control Temp = 19/20 * (Room Temp) + 1/20 * (Discharge Air Temp)
Unoccupied Heating (Night setback)
The supply fan will cycle on when the control temperature is equal or below the Unoccupied Heating
setpoint. The outdoor air damper will remain closed.
If there is hot water or steam heat and the entering water temperature is above 80°F, the heating
valve will be wide open or the face & bypass damper will be in the full face position. The discharge
air temperature will not be allowed to go over 150 °F.
If there is electric heat, the first stage will be turned on when the control temperature falls one degree
below the unoccupied heating setpoint. If, 30 seconds later, the control temperature is still below
setpoint, another stage of heat will be turned on. If the control temperature is above or equal the
setpoint plus 2 degrees, a stage of heat will be turned off. If, 30 seconds later, the control
temperature is still above setpoint plus two degrees, another stage of heat will be turned off. The fan
remains on whenever any stage of electric heat is on.
If there is an air source heat pump, the compressor will come on in the heating mode whenever the
control temperature falls below the unoccupied heating setpoint and will go off if the room
temperature rises above setpoint. The first stage of electric heat will come on if the control
temperature is at or below setpoint minus 2 degrees and the outdoor air temperature is below 20°F.
If, 30 seconds later, the control temperature remains below setpoint minus 2 degrees, another stage of
heat will be turned on. If the control temperature is at or above setpoint plus 2 degrees, a stage of
heat will be turned off. If, after 30 seconds, the control temperature remains at or above setpoint plus
2 degrees, another stage of heat will be turned off. The fan remains on whenever Unoccupied
Cooling (Night Setup)
The supply fan will cycle on when the control temperature is at or above the Unoccupied Cooling
setpoint. The outdoor air damper will remain closed.
If there is chilled water cooling and the entering water temperature is below 80°F, the cooling valve
will be wide open or the face & bypass damper will be in the full face position whenever the control
temperature is above setpoint. The cooling valve will be closed or the face & bypass damper will be
in the bypass position if the control temperature goes below setpoint minus 2 degrees deadband.
If there is DX cooling, the compressor will be turned on when the control temperature goes one
degree above the unoccupied cooling setpoint. It will be turned off if the control temperature goes
below setpoint.
If there is a heat pump, the compressor will come on in the cooling mode whenever the control
temperature goes above the unoccupied cooling setpoint and will go off if the room temperature goes
below setpoint.
Occupied Heating
The supply fan is on and the outdoor air damper will modulate. If the room temperature is at or
below the occupied heating setpoint minus 3 degrees, the damper will be closed. If the room
temperature is greater than the occupied heating setpoint minus 3 degrees, the damper will be in the
minimum position. If the outdoor air temperature is below 68 °F (adj.), the dampers will be allowed
to open for free cooling provided that the room temperature is above the ventilation cooling setpoint.
Temperature
Calculation Control
Water or Steam Heat
Electric Heat
Air Source Heat
Pumps
Chilled Water
DX Cooling
Heat Pump
MicroTech Unit Ventilator Open Protocol 18
If there is hot water or steam heat, the heating valve or face & bypass dampers will be modulated to
maintain the occupied heating setpoint (for 2 pipe units the entering water temperature must be above
80°F). The discharge air temperature will not be allowed to go below 55°F (adj.).
If there is electric heat, the first stage will be turned on when the temperature falls one degree below
the occupied heating setpoint. If, 30 seconds later, the temperature is still below setpoint, another
stage of heat will be turned on. If the temperature is at or above setpoint, a stage of heat will be
turned off. If, 30 seconds later, the temperature is still at or above setpoint, another stage of heat will
be turned off. The discharge air temperature will not be allowed to go below 55°F (adj.).
If there is an air source heat pump, the compressor will come on in the heating mode whenever the
room temperature falls below the occupied heating setpoint and will go off if the room temperature
rises above setpoint. The first stage of electric heat will come on if the room temperature is at or
below setpoint minus 2 degrees and the outdoor air temperature is below 20°F. If, 30 seconds later,
the temperature remains below setpoint minus 2 degrees, another stage of heat will be turned on. If
the temperature goes above setpoint minus 2 degrees or the outdoor air temperature goes above 20°F,
a stage of heat will be turned off. If, after 30 seconds, the temperature remains above setpoint minus
2 degrees, another stage of heat will be turned off. The discharge air temperature will not be allowed
to go below 55°F (adj.).
Occupied Cooling
The supply fan is on and the outdoor air damper will modulate. If the room temperature is at or
above the occupied cooling setpoint plus 3 degrees, the damper will be closed. If the room
temperature is less than the cooling setpoint plus 3 degrees, the dampers will be in the minimum
position. If the outdoor air temperature is below 68 °F (adj.), the damper will be allowed to open for
free cooling provided that the room temperature is above the ventilation cooling setpoint.
If there is chilled water cooling, the cooling valve or face & bypass dampers will be modulated to
maintain the occupied cooling setpoint ( for 2 pipe units the entering water temperature must be
below 80°F).
If there is a DX cooling, the compressor will come on whenever the room temperature goes over the
occupied cooling setpoint and will go off if the room temperature goes below setpoint.
If there is a heat pump, the compressor will come on in the cooling mode whenever the room
temperature goes over the occupied cooling setpoint and will go off if the room temperature goes
below setpoint.
Water or Steam Heat
Electric Heat
Air Source Heat
Pump
Chilled Water
DX Cooling
Heat Pump
19 MicroTech Unit Ventilator Open Protocol
Damper Control
If Outdoor Air Temperature 68 °F or over:
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
Minimum Position
Occupied Cooling Spt.
Occupied Heating Spt.
Outdoor Air Dampers Closed
Outdoor Air Dampers Closed
If Outdoor Air Temperature is under 68 °F:
Ventilation Spt
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
Minimum Position
Occupied Cooling Spt.
Occupied Heating Spt.
Outdoor Air Dampers Modulate
Outdoor Air Dampers Closed
MicroTech Unit Ventilator Open Protocol 20
Electric Heat Control
If Occupied:
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
Occupied Cooling Spt.
Occupied Heating Spt.
Stage Down
Stage Up
If Unoccupied:
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
Unoccupied Heating Spt
Occupied Heating Spt.
Stage Down
Stage Up
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McQuay MicroTech UV5S2 Series Protocol Manual

McQuay
Brand
McQuay
Model
MicroTech UV5S2 Series
Type
Protocol Manual
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