HomeMy WebLinkAbout3.c. Proposed City Hall HVAC Control System PurchaseI:\City Clerk\Agenda Items\Approved Items\3.c. Proposed City Hall HVAC Control System Purchase.docx
EXECUTIVE SUMMARY
City Council Work Session: May 9, 2016
AGENDA ITEM: Proposed City Hall HVAC Control System
Purchase
AGENDA SECTION:
Updates
PREPARED BY: Patrick Wrase, PE, Director of Public Works /
City Engineer AGENDA NO. 3.c.
ATTACHMENTS: Quotes APPROVED BY: ddj
RECOMMENDED ACTION: Discussion
ISSUE
Staff wishes to provide Council with updated information about the Heating, Ventilation and Air
Conditioning (HVAC) master control system purchase, as originally discussed at the March 9, 2016 City
Council Work Session:
The following quotes were acquired for the HVAC control system, copies of which are attached.
Company Base Quote Final Estimated Cost
Yale Mechanical $84,955 $89,955 with same number of Remote
Terminal Units (RTUs)
Corporate Mechanical $84,360 $85,260 with new gas monitor
NAC Mechanical & Electrical $82,444 $85,454 with recommended alternates
BACKGROUND
The purchase of an HVAC master control system for City Hall was originally discussed at the March 9,
2016 City Council Work Session. At that time, Council members requested that staff research the item
further to verify if the quotes were equally comparable, and whether or not there were issues with
proprietary software or equipment proposed in any of the quotes.
In response, staff enlisted the services of a mechanical engineer with IS-Group to review the quotes and
provide an opinion about which quote offered the best value for the City. The engineer reviewed the
quotes and spoke with two City staff members to ensure he had the information he needed to provide a
thorough response. The total cost of this review and feedback was $250.
The following pages contain the mechanical engineer’s responses to specific questions from City staff, as
well as a comparison matrix to illustrate the similarities and differences between the quotes.
2
Q: Do the quotes from Corporate Mechanical and Yale both include the same Alternates that are
specified as “extras” in the NAC quote?
A: No they do not. NAC is offering to upgrade components.
Q: Are the quotes covering the exact same services and equipment? Do any of the quotes
contain items that are not in the others?
A: See the attached Matrix. The Yale quote did not include all of the Remote Terminal Units (RTUs);
they are asking for an additional $5,000 to include the additional two RTUs.
Q: Do any of the quotes require using proprietary equipment to compliment the software, or are
we free to choose from multiple brands for ongoing maintenance/upgrades/etc.?
A: NAC and Yale are proposing the Alerton Compass system which is BACnet (communication
protocol) compatible. Other BACnet systems can be integrated, but it would always require programming
on the Alerton system level. Corporate Mechanical is proposing the Honeywell-Niagara AX. This system
is considered to be more “open,” meaning it can integrate BACnet systems as well as other systems using
different communications protocols. However the Honeywell-Niagara system also does have some
proprietary items that will require a Honeywell-Niagara AX Contractor.
BACnet has become a standard communication protocol in the HVAC industry. Most equipment
manufacturers offer it as an option and it can be integrated into BACnet-based HVAC control systems.
The Niagara-AX platform uses JAVA-based framework, and it requires an annual license fee to keep it
active. (Note – Staff confirmed with Corporate Mechanical that there is not an annual license fee, but
there may be ongoing upgrade fees whenever we implement Windows or Java updates).
Q: Which of the quotes appears to provide the best value?
A: Based on conversations with the City, I don’t believe a system like the Honeywell Niagara AX system
is necessary because it is unlikely that other systems such as lighting, security, fire alarm, etc. (which may
use other communication protocols) will ever be integrated into the HVAC control system. In addition, it
appears the City has had previous issues with JAVA compatibility. In my opinion the NAC quote would
provide the best value for the City.
3
4
The total cost for the control panel, additional sensors, and gas monitor from NAC is $85,454. The
contractor will apply for an Xcel Energy rebate on the City’s behalf. The rebate is expected to be in the
range of 10-25% of the overall project cost, bringing the net cost down to $64,100 - $76,900.
SUMMARY
Based on the information provided by the mechanical engineer at IS-Group, staff recommends accepting
the quote of NAC Mechanical & Electrical for the installation of the HVAC master control system.
Unless there is a need for further discussion and/or research, a request for City Council authorization to
accept the quote from NAC Mechanical & Electrical will be brought to the May 16, 2016 Regular City
Council meeting.
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Combustion Heat&Power
Mechanical&Electrical Services A Division of NAC
1001 Labore Industrial Court,Suite B Vadnais Heights.Niinnesota 55110 tel 651-430-9868 fax:651-49Q-163o
March 1, 2016
Mr.Joe Werden
Facility Specialist
Rosemount City Hall
2875 145`h Street West
Rosemount, MN 55068
RE: Rosemount City Hall Building Controls Retrofit
Current Situation: The building's current HVAC control system is old and components to repair the head
end are no longer readily available.
Proposed Solution: NAC will install a new Alerton Compass head end system, (See Attachment A). This
solution removes the multiple issues that cause JAVA based building control systems to lock up and fail.
NAC will convert the entire HVAC system to direct digital controls including the following:
NAC to remove the existing controls for the RTU's boilers, reheat coils and VAV boxes
2)Carrier rooftop units
o Project to assume RTU's have conduit capacity for low voltage network cabling
o Full base automation
2)Trane Itelipak rooftop units
o Project to assume RTU's have conduit capacity for low voltage network cabling
o Providing set-point integration and monitoring set-points
2j Boilers (Start/Stop/Status)
4) Hot water loop pumps
39) Reheat coils (Reuse existing valves)
o Discharge air sensors
24)VAV boxes (Reuse existing valves)
o Discharge air sensor
12) Damper actuators (Reuse existing actuators)
63)Temperature sensors
1)Garage CO System—QuatroSense Environmental Ltd.
o (1) base sensor
o (1) remote sensor
1) Head End Global Controller w/Battery Back-up
Compass Software (See Attachment A for Specifications), Graphics Design
Program schedules,trend logs and alarming sequences
Program alarm protocol notifications for critical equipment
Onside Training(4 Hours) (Additional (4) Hours if needed to be provided at no cost)
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Open Communication Standards
NAC is a licensed Alerton Controls dealer. There are currently four (4) contractors that
service these controls that reside in the Twin Cities area.
All programming tools,software etc.will be left with the owners.
All software will be accessible by the owners.
Integration
NAC has extensive experience with BACnet protocols and older Honeywell systems.
Many of our customers require integration to keep costs low and we have
been successfully doing so for 25 years.
Web-Based Front End
NAC will furnish, program and configure a complete web-based front end BAS system
for easy access.
The system will be accessible from the following locations
The BAS front end operator workstation
Anywhere an internet connection is had (with permission, coordinated
with owner IT staff)
OperatorTraining
NAC will train Rosemount City Hall personnel on the specifications, or as needed to
gain a comprehensive understanding of the system,schedules,trending and alarms.
Warranty and Service Plan
The systern will be warrantied for a period of one(1)year after substantial completion.
NAC has one of the largest service divisions in the Twin Cities and makes serving
our existing customers a priority.
Proposed Timetable
If awarded, NAC will begin engineering submittals right away. Long lead items will be
addressed first. NAC will coordinate with building staff to reduce shutdowns and
provide a swift changeover to DDC controls. We will complete in the proposed
timeline of 90 days from project approval. The goal will to have the system
operational before summer if approval happens in the next two weeks.
Sequence of Controls
See Attachment B for a sample of the controls submittal that will be provided prior to
the project kicking off.
Client Base Bid: $82,444 Eighty Two Thousand Four Hundred Forty Four pollars and no/100).
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Alternate 1 (Upgraded Zone Sensors) Add$ 1,560.00
Furnish/instail twenty four(24) Microset 4 adjustable sensors at VAV locations or rooms
designated by Rosemount City Hall -(24) @ $65
Alternate 2 (Upgrade to Honeywell E-3Point Toxic&Combustible Gas Monitor) Add$ 1,450.00
The current QAS—200 Series Controller is obsolete and discontinued.
Upgrade to Honeywell E-3Point System
o Base plate and cartridge
o Remote plate and cartridge
Zone sensor options and clarifications: (Cut sheets are attached). Remember,we can add adjustable
sensors in any or all of the zones,you just let us know what you like.
1.)Stainless steel plate-Included with your base bid
Pros-cost, simple look, robust,tamper resistant
Cons-no set-point adjustment at the sensor
2.)Alerton Microset 4-Alternate 1
Pros-reads both temperature and relative humidity,sleek modern look, adjustable set-points at
the sensor, occupancy override, mode indicating LED backlights
Cons-cost
Xcel Rebate:This project will qualify for an Xcel rebate based on the project scope. NAC will handle all of
the paperwork so this project can get the maximum rebate allowed. Typically we see rebates in the
range of 10-25%of the overall project.This rebate will be quantified prior to starting the project.
Project Note(s):
1. Proposal based upon regular weekday working hours.
2. Pricing assumes existing valves; piping, steam traps, and mechanical systems are in proper
functioning condition and can be reused.
3. Existing wiring will be reused wherever possible
4. Client to provide workstation, monitor and network connection for PC and Global Controller.
5. Temperature Sensors are flat plate.
6. Plenum cable to be used where code allows.
7. Wire mold will be used were it is not possible to fish wire to units (i.e. entry way)
Accepted by:
ROSEMOUNT CITY HALL NAC MECHANICAL& ELECTRICAL SERVICES
Signature: Signature: M'TO`J
Name: Name:Marc Tolvay
Title: Title: Account Manager
Date: Date: 3-1-16
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Attachment A-Alerton Option
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Attachment B—Sample of Submittals
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Attachment C-Graphic Screens to be Provided
NAC will design and develop`Floor Plan'style graphics and `Menu List'styles of navigation. Custom
equipment graphics will be included (for AHU, DX Units,VAVs, etc.). NAC's control system will monitor
and trend all relevant points in the system including the ones provided by Rosemount City Hall on their
Points Lists document.
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CO2 SENSOR ORDERING INFORMATION
OPERATING TEMPERATURE RANGE- 3Z to IZ?°t to ro So°C'>. TEM NUMBER
L54-'fF{ M1licroset vith temperature and huu idit ensors
POWER CONSUMPTION- 1.i ni.for roea.urement everv 30s;
0.74 m.1 Fur nu:asurement everv(Os;A6 tA for measuremeiit everv tilS4-CH-it licroset#viYh tem eraturc:and humidity;ensors
1 5 min; 2 Ei:(or measw emrnt e er 60 min.
and no loza,o
MEASUREMENT RANGE-0 to 5000 pm. IS4=1'H-J4S"fP :IS/'I I'Ylicroset 4 with ternperature and hiirniditv
c,ncors
ACC IRACY- _f_ p p>rn,- 3°„of readin.
IS-TI-I('1-Iicro et#Ei ith temperature,humidlty,and CO?seu orHUMIDITYSENSOR
OPERATING TEMPERATURE RANGE- o r 1 i 3°r=to co+5°c'.
REPEATABILITY--tinimum ±OS'>RH.
ACCURACY- ± 3°>ar to co o"R-I,
7uo at U tu 10"and 90"u to l00"hH.
RATINGS- UL.Standard ior Safetv 916;
EbIC D rectice 2 9/33(/EEC(Euro eari CE llarkj
F('C Part 15.107& 10,Cla.}3,CFR 7-15.
6670 135t6 Avenue•NE,Rcdmond,VA 980?
7tlephone:(-_>i)A6-8-00/ Fax:(42i)369-3 5
alerYon.com / sales(C alerTon.com
S=2014 HonevEcell International Inc:111 Riglits Re er ed.L G\9S F I I_14 Z
j
Automation Components,In. Product Data
Stainless Plate Sensor
Features
TS-1101—WA-1—AA Temperature Only
Brushed Stainless Plate
High Accuracy
High Durability
2year Warranty
t ROHS Compliant
Product Description
The TS-1101-WA-10-AA stainless plate is a single The TS-1101-WA-10-AA wall plate is both non-
point temperature sensor with an output of lOK Ohms polarity and non-position sensitive.
at 77°F (2°C). The temperature sensor has an overall
accuracy of f0.36°F (0.2 C)over the range of 32 to There are a number of applications in which the TS-
158°F(0 to 70°C). 1101-WA-10-AA sensors may be may be used to
monitor and control the building temperature. A few
The TS-1101-WA-10-AA stainless plate temperature of the most common applications include:
should be mounted on an interior wall away from
windows,heating and cooling suppty vents,doors,and Office Buildings
sunlight. All of the sensors have a 1/8" integral foam Schools
insulation pad to eliminate any thermal effects on the Locations where durability is essential
sensor from within the wall itself. Applications in which a traditional thermostat
is not acceptable
Each TS-1101-WA-10-AA sensor shall have two(2)
22 AWG yellow Etched Teflon lead wires for making All of these units come with a five year warranty. For
all connections. The sensor is encapsulated to the more information regarding these products,please
stainless steel plate with the use of a thermally contact ACI at the numbers listed below,or visit our
conductive epoxy. The normal operating temperature website address at www.workaci.com for all of the up
of these sensors should be from-40 to 212°F(-40 to to date product literature.
l00°C).
Product Specifications
Sensor Output lOK Ohms a 77°F(25°Cl OperatingTemperature -40 to 212°F(-40 to 100°C)
Range
SensorAccuracy 0.36°F(02°C)32 to 158°F(0 to 70°C) Operating Humidity 0 to 90%RH non-condensing
Ran e
SensorInterchangeability +0.36°F(0.2°C)32 to l58°F(0 to 70°C) Environmental RoHS-Directive 2002/95/EC
Com liance
Dissipation Constant 3mW/°C nominal Still Air)
2305 Pleasant View Rd. • Middleton Industrial Park Middleton,WI 53562
www.workaci.com
PH: (608)831-2585 FAX(608)831-7407
Filena ne-.COOOOOl7RevlDoc
Dimensions
z.s I
1693 mm1
F 1.38"
l3 0 mm1
Temp.C Temp.F
lOK(TypelI)
R Ohms
0 32 32,692.0
5 41 25,418.83
2).18"(4.7 mm)
10 50 19,9(5.94
Mounting Holes
15 59 15,719.62
16 60.8 15,005.91
17 62.6 14,328.62
18 64.4 13,685.69
19 66.2 13,075.22
4.49" 20 68 12,495.39
I 14.05 mm) 21 69.8 11,944.51
22 71.6 11,420.98
3.90" Z3 73.4 10,923.32
24 75.2 10,450.10
25 77 10,000.00
26 78.8 9,571.78
27 80.6 9,164.26
ALERTON 28 82.4 8,776.33
y 29 84.2 8,406.96
30 86 8,055.16
31 87.8 7,720.01
32 89.6 7,400.64
33 91.4 7.096.22
0.60" 34 93.2 6,805.98
1 ? ») 35 95 6,529.19
40 104 5,324.13
45 113 4,366.54
50 122 3,601.05
Ordering Information
Alerton Model#Sensor T e Wire Colors
TS-ll01-WA-10-AA lOK Ohms Yellow/Yellow
These units are manufactui•edfor Alerton by Automation Components, Inc.
2305 Pleasant View Rd. Middleton Industrial Park Middleton,WI 53562
www.workaci.com
PH: (608)831-2585 • FAX(608)831-7407
Filename:C0000017 Rev I.Doc