Search

15604-8
AUTOMATIC TEMPERATURE CONTROL (ELECTRIC)

b. Unoccupied operation: The outside air dampers shall be closed and the
return air damper shall open fully.

c. The exhaust air damper shall be closed at all times unless economizer
operation is available and the outside air damper is open beyond the
required position for ventilation.

Cooling: When the outside air temperature rises above 60°F (adj.), or when the

outside air temperature is above 50°F (adj.) and the outside enthalpy is greater

than the indoor enthalpy, the RTU shall be in cooling mode.

a. The compressors shall operate as necessary to maintain the space cooling
setpoint (74°F occupied / 85°F unoccupied adj.).

b. Economizer cooling: When the temperature at the outside air temperature
sensor falls below 60°F and the outside air enthalpy is less than the return
air enthalpy during occupied periods; the supply fan shall be in the
occupied mode; and the outside air, exhaust air, and return air dampers
shall modulate from minimum to 100% as necessary to maintain a
discharge air temperature of 60°F (adj.) at the discharge air temperature
sensor.

Heating: When the outside air temperature falls below 60°F (adj.), the RTU

shall be in heating mode.

a. CRTU-2: The compressors shall operate as necessary to maintain the
heating discharge air temperature (68°F occupied adj.).

b. CRTU-3: The compressors shall operate as necessary to maintain the
space heating setpoint (68°F occupied / 60°F unoccupied adj.).

Gas-Fired Makeup Air Unit (CMUA-1)

1.
2.

Occupied/unoccupied schedule shall be programmed as provided by the owner.

Supply fan:

a. Occupied operation: the fan shall be energized and operating
continuously.

b. Unoccupied operation: the fan shall be de-energized.

Ventilation:

a. Occupied operation: The outside air damper shall be open.

b. Unoccupied operation: The outside air dampers shall be closed.

Heating:

a. The gas-fired furnace shall ignite and stage as necessary to maintain the
discharge air temperature setpoint (55°F adj.)

Ductless Split System Heat Pump (CDS & CHP)

System controls shall be packaged controls provided by the manufacturer.
a. CDS-1A, 1B, & 1C/HP-1

i. Cooling setpoint — 74°F (adj.)

ii. Heating setpoint — 70°F (adj.)
b. CDS-2/ HP-2

i. Cooling setpoint — 85°F (adj.)

ii. Heating setpoint — 55°F (adj.)

Circulating Pump (CCP-1)

The pump shall be energized and operate continuously when either CSF-2A or
CSF-3A is energized and the outside air temperature is less than 50°F (adj.).

13089K

15604-9
AUTOMATIC TEMPERATURE CONTROL (ELECTRIC)

G. Circulating Pump (GCP-1)
1. |The pump shall be energized and operate continuously when either GSF-1 is
energized and the outside air temperature is less than 50°F (adj.).
H. Heat exchanger (CHX-1 & GHX-1)
1. |The associated steam control valve shall open as necessary to maintain a heating
leaving water temperature in accordance with the following temperature

schedule:
Outside Air Temperature Hot Water Supply Temperature
50°F 140°F
40°F 152°F
30°F 164°F
20°F 176°F
10°F 188°F
O°F 200°F

I. Laboratory Hood Supply Fan (CSF-2A & 3A):
1. | The fan shall be controlled by a local light switch at the associated laboratory
exhaust hood.
2. The three-way heating control valve shall modulate as necessary to maintain
the associated heating coil discharge air temperature setpoint (68°F adj.)
J. Exhaust Fan (CEF-10A & 15A);:
1. | The fan shall be energized and operate continuously.
K. Ventilation Fans (GEF-1, GEF-2, GSF-1):
1. Controlled by the following associated with connected ATC panel:
a. Hand/Off/Auto switch
b. Run cycle timer
c. Light switch interlock
2. When the lights in the space are energized or the switch is in the “Hand”
position the fans shall be in the occupied mode; when the lights in the space are
de-energized the fans shall be in the unoccupied mode.
3. Ventilation:
a. Occupied:
i. The fans shall be energized.
ii. Damper GD-1 shall close.
iii. Damper GD-2 shall open.
iv. Theintegral motorized backdraft dampers on each exhaust fan shall
open.
v. The three-way heating control valve shall modulate as necessary to
maintain the heating coil discharge air temperature setpoint (55°F

adj.).
b. Unoccupied:
i. The fan shall be controlled by the run cycle timer on repeating
schedule:
ii. Active:

(1) The fans shall be energized.
(2) | Damper GD-1 shall close.
(3) | Damper GD-2 shall open.

13089K

15604-10
AUTOMATIC TEMPERATURE CONTROL (ELECTRIC)

(4) The integral motorized backdraft dampers on each exhaust

fan shall open.
iii. Inactive:

(1) The fans shall be de-energized.

(2) Damper GD-1 shall open.

(3) | Damper GD-2 shall close.

(4) The integral motorized backdraft damper on each exhaust
fan shall close.

(5) The three-way heating control valve shall modulate as
necessary to maintain the heating coil discharge air
temperature setpoint (55°F adj.).

iv. Active —5 minutes; Inactive — 25 minutes (adj.)
4. Heating:

a. When the temperature at the wall mounted thermostat falls below the
setpoint (55°F adj.), GSF-1 shall energize and the heating control valve
shall open to allow full flow through the heating coil.

Intake Dampers (D-SP1 & D-SP2)
1. Dampers shall be interlocked with existing exhaust fan (SEF-2) to be open
when fan is energized.

3.2 INSTALLATION

A.

The automatic temperature control mechanics shall provide supervision and direction
for all trades that are installing equipment supplied by the temperature control
manufacturer.

All controllers, wiring, equipment, etc., shall be installed by mechanics regularly
employed by the temperature control manufacturer.

Control wiring shall be neatly installed, parallel to building lines, and in locations not
subject to damage.

3.3 TESTING AND COMPLETION

A.
B.

Demonstrate the function of each system in the presence of the Engineer.

Upon completion of the project, the control system provider shall:

1. Completely adjust, ready for use, all thermostats, controllers, valves, damper
operators, relays, etc., provided under this Section.

2. Furnish three (3) instruction manuals covering the function and operation of the
control systems on the project for the use of the Owner's operating personnel. A
representative of the ATC systems provider shall be available on site for 8 hours
of start-up and shall conduct an operational test of the system in the presence
and satisfaction of the Engineer's designated representative and the Owner's
representative. During this 8-hour period, the technician shall instruct the
Owner's Representatives in the proper use and routine maintenance of all ATC
equipment.

3.4 OPERATOR TRAINING

A.

Operator Training shall be performed by a duly authorized representative of the ATC
system provider, who is fully trained in the installation, startup and operation of the
equipment.

13089K

3.5

3.6

3.7

15604-11
AUTOMATIC TEMPERATURE CONTROL (ELECTRIC)

Provide combined training and operational assistance for plant operators in the proper
operations of the ATC system equipment, and in the techniques, methods, schedules,
etc. associated with maintenance.

The level of the training and operational assistance provided shall be as required to
ensure proper understanding of the equipment's operations, maintenance and warranty
conditions. Should the representative require time in addition to the minimums
indicated herein to sufficiently detail the proper operations and maintenance of the
equipment, it will be provided at no additional cost to Owner. Under absolutely no
circumstances shall warrantees become void due to Owner's failure to follow
operational and maintenance procedures which were not fully detailed and described
in Owner's representatives during these sessions.

At the Owner's discretion, the training sessions may be video recorded for Owner's
future use.

The system provider representative shall fill out the Equipment Training Certification
form included within this Section. Training will not be considered complete until this
form has been provided to the Engineer.

IDENTIFICATION

A.

B.

Provide all control equipment, panels and manual controls with black lamacoid
nameplates engraved with white letters indicating the function, tag number, service
or apparatus being served.

Properly number all wires and terminals where applicable.

GUARANTEE

A.

The control system designated on Drawings and plans and herein specified, shall be
guaranteed to be free from original defects in both material and workmanship for a
period of one (1) year of normal use and service, excepting damages from other
causes. This guarantee shall become effective starting the date the Owner begins to
receive beneficial use of the system.

PROGRAMMED MAINTENANCE

A.

Upon completion of the installation, the control contractor shall submit to the Owner
for consideration, an agreement, to provide the necessary programmed maintenance
to keep the various control systems in proper working condition.

This proposed programmed maintenance agreement shall fully describe the
maintenance work to be performed and shall advise the cost of this work during the
1-year guarantee period provided as part of this Contract by the ATC Contractor as
well as for subsequent years thereafter.

13089K

15604-12
AUTOMATIC TEMPERATURE CONTROL (ELECTRIC)

ATC SYSTEM TRAINING CERTIFICATION

Owner: Date:

Project:

Contractor:

ATC System Provider
Representative:

Equipment:

1. I have trained the Owner's personnel in the proper operation and maintenance of the above
equipment.

(Authorized Representative (Date)
of the ATC System Provider)

2. The personnel listed below attended the training session.

(Owner's Representative) (Date)
3. Witnessed by

Wright-Pierce (Date)
Wright-Pierce
Engineers

99 Main Street
Topsham, ME 04086

END OF SECTION

13089K

Police

Addendum A: PoliceApp.com Terms of Use

Welcome to our website. If you continue to browse and use this website you are agreeing
to comply with and be bound by the following terms and conditions of use which govern
PoliceApp.com’s relationship with you in relation to this website.

The term ‘PoliceApp.com’ or ‘us’ or ‘we’ refers to the owner of the website. The term ‘you’
refers to the user or viewer of our website.

The use of this website is subject to the following terms of use:

e The content of the pages of this website is for your general information and use
only. It is subject to change without notice.

e Neither we nor any third parties provide any warranty or guarantee as to the
accuracy, timeliness, performance, completeness or suitability of the information and
materials found or offered on this website for any particular purpose. You
acknowledge that such information and materials may contain inaccuracies or errors
and we expressly exclude liability for any such inaccuracies or errors to the fullest
extent permitted by law.

e Your use of any information or materials on this website is entirely at your own risk,
for which we shall not be liable. It shall be your own responsibility to ensure that any
products, services or information available through this website meet your specific
requirements.

e This website contains material which is owned by or licensed to us. This material
includes, but is not limited to, the design, layout, look, appearance and graphics.

e Reproduction is prohibited other than in accordance with the copyright notice,
which forms part of these terms and conditions.

e All trademarks reproduced in this website, which are not the property of, or licensed
to the operator, are acknowledged on the website.

e Unauthorized use of this website may give rise to a claim for damages and/or be a
criminal offense.

e From time to time this website may also include links to other websites. These links
are provided for your convenience to provide further information. They do not
signify that we endorse the website(s). We have no responsibility for the content of
the linked website(s).

e Your use of this website and any dispute arising out of such use of the website is
subject to the laws of the United States of America.

POLICEAPP.COM / Nashua, NH agreement - PAGE 7 of 8

15619-1

SECTION 15619

GAS FIRED SEPARATED COMBUSTION AIR HANDLING UNITS

PART 1 - GENERAL

1.1 DESCRIPTION

A. Work Included: Provide and install pad-mounted natural gas fired, separated
combustion makeup air unit of the type, size and performance as shown on the
Drawings and specified herein.

B. Related Work Specified Elsewhere: "HVAC - General" is specified in this Division.
"Electrical - General" is specified in Section 16000. For gas piping, refer to Section
15444, "Natural Gas System". For control sequence, refer to Section 15604,
"Automatic Temperature Control (Electric)".

12 QUALITY ASSURANCE
A. Verification of Capacity: Supply manufacturer's certificate of output for the unit.
B. Install unit in compliance with NFPA 54 as amended by the State of New Hampshire
"Propane and Natural Gas Equipment Standards".
C. Provide air handling units with performance characteristics matching scheduled
values, as a minimum, in conformance with ASHRAE 90.1.

1.3 SUBMITTALS TO THE ENGINEER
A. Submit certificates, in duplicate, of verification of unit output and certification of
compliance with the American Gas Association Safety Standards.
B. Submit shop drawings, manufacturer's literature, installation instructions,
maintenance data and operating instructions as specified in the General Conditions of
the Construction Contract.

14 DELIVERY, STORAGE AND HANDLING
A. Deliver in manufacturer's unopened containers as job progress requires.
B. Storage: Store in unopened containers in a weathertight building.
C. Handling: Exercise care when handling heaters to prevent damage of any nature.

PART 2 - PRODUCTS

2.1 SEPARATED GAS-FIRED AIR HANDLING UNIT
A. General: Manufacturer and model numbers are indicated to establish type and quality.
B. Acceptable Manufacturers:
1. | Greenheck
2. Reznor
3. Equivalent product.

2.2 MATERIALS
A. Unit with Integral Indirect Gas-Fired Heating shall be fully assembled at the factory
and consist of an insulated metal cabinet, outdoor air intake with aluminum bird
screen, motorized intake damper, filter assembly for intake air, sensors, supply air

13089K

15619-2
GAS FIRED SEPARATED COMBUSTION AIR HANDLING UNITS

blower assembly, and electrical control unit with all specified components and
internal accessories factory installed and tested and prepared for single-point high
voltage connection.

2.3 CABINET

A. Materials: Formed, double wall insulated metal cabinet, fabricated to permit access
to internal components for maintenance.

1. Outside casing: 18 gauge, galvanized steel meeting ASTM A653 for
components that do not receive a painted finish. Pre-painted components as
supplied by the factory shall have polyester urethane paint on 18 gauge
galvanized steel. Base rail is 12 gauge, galvanized steel.

2. Internal Assemblies: 24 gauge galvanized steel except for motor supports which
shall be minimum 14 gauge galvanized steel.

B. Comply with NFPA 90A and NFPA 90B and erosion requirements of UL 181.

1. Materials: Fiberglass insulation. If insulation other than fiberglass is used, it
must also meet the Fire Hazard Classification shown below.

a. Thickness: 1 inch

b. Fire Hazard Classification: Maximum flame spread of 25 and smoke
developed of 50, when tested in accordance with ASTM C 411.

c. Location and application: Floor of each unit shall be insulated with either
one half inch thick or 1 inch thick rigid fiberglass insulation, covered on
one surface with integral aluminum foil.

C. Access panels: Unit shall be equipped with removable access panels to provide easy
access to all major components. Access panels shall be fabricated of 18 gauge steel.
Removable access panels shall incorporate a formed drip edge.

D. Supply Air blower assembly: Blower assembly consists of an electric motor and a
belt driven, double width, double inlet forward curve blower. Assembly shall be
mounted on heavy gauge galvanized rails and further mounted on minimum 1.125
inch thick neoprene vibration isolators.

E. Control panel / connections: Unit shall have an electrical control center where all high
and low voltage connections are made. Control center shall be constructed to permit
single-point high voltage power supply connections.

F. Indirect Gas-Fired Furnace:

1. Integral combustion gas blower.

2. Fault sensors to provide fault conditions to optional digital controller or
building controls.

3. 4-pass tubular heat exchangers, constructed of type 409 stainless steel. Heat
exchanger tubes shall be installed on the vest plate by means of swaged
assembly, welded connections are not acceptable. Heat exchanger tubes shall
be supported by a minimum of two fabricated assemblies that support the tubes
and also permit expansion and contraction of the tubes.

4. Weather-tight metal housing with intake air vents.

5. | Hinged door shall provide access to the enclosed vest plate, control circuitry,
gas train, burner assembly and exhaust blower.

6. Shall include a kit for outdoor mounting with vertical stack venting.

G. Dampers: Motorized intake air dampers of low leakage type shall be factory installed.

13089K

15619-3
GAS FIRED SEPARATED COMBUSTION AIR HANDLING UNITS

2.4 BLOWER

A. Supply Air: Belt drive motor and blower shall be assembled onto a minimum 14 gauge
galvanized steel platform and must have neoprene vibration isolation devices,
minimum of 1 - 1/8 inches thick.

B. Blower assemblies: Shall be statically and dynamically balanced and designed for
continuous operation at maximum rated fan speed and horsepower.

C. Centrifugal blower housing: Formed and reinforced steel panels to make curved scroll
housing with shaped cutoff.

D. Forward curved blower (fan) wheels: Galvanized or aluminum construction with inlet
flange and shallow blades curved forward in direction of airflow. Mechanically
attached to shaft with set screws.

E. Blower section motor source quality control: Blower performance shall be factory
tested for flow rate, pressure, power, air density, rotation speed and efficiency.
Ratings are to be established in accordance with AMCA 210, "Laboratory Methods
of Testing Fans for Rating".

2.5 MOTORS

A. General: Blower motors greater than .75 horsepower shall be "NEMA Premium"
unless otherwise indicated. Compliance with EPAct minimum energy-efficiency
standards for single speed ODP and TE enclosures is not acceptable. Motors shall be
heavy-duty, permanently lubricated type to match the fan load and furnished at the
specified voltage, phase and enclosure. Drives shall be sized for a minimum of 150%
of driven horsepower and pulleys shall be fully machined cast-type, keyed and fully
secured to the fan wheel and motor shafts. Electric motors of ten horsepower or less
shall be supplied with an adjustable drive pulley.

2.6 UNIT CONTROLS
A. The unit shall be constructed so that it can function as a stand-alone heating system
controlled by factory-supplied controllers, thermostats and sensors or it can be
operated as a heating system controlled by a Building Management System (BMS).
B. Sensors to be provided with the unit include:
1. Heating inlet air sensor
2. 120V/24V smoke detector

2.7 FILTERS
A. Unit shall have 2" thick permanent metal filters located in the outdoor air intake and
shall be accessible from the exterior of the unit.

PART 3 - EXECUTION

3.1 INSTALLATION
A. Install packaged unit in strict accordance with the manufacturer's instructions and
recommendations and as shown on the Drawings.
B. Install wind and seismic restraints according to manufacturer's written instructions
and in accordance with Division 15 Section "Vibration and Seismic Controls for
HVAC Piping and Equipment."

13089K

15619-4
GAS FIRED SEPARATED COMBUSTION AIR HANDLING UNITS

3.2 FIELD QUALITY CONTROL

A.

B.
C.

Manufacturer's Field Service: Inspect, test, and adjust components, assemblies, and

equipment installations, including connections. Report results in writing.

Perform tests and inspections and prepare test reports.

Manufacturer's Field Service: Inspect components, assemblies, and equipment

installations, including connections, and to assist in testing. Report results in writing.

Tests and Inspections:

1. After installing and after electrical circuitry has been energized, test units for
compliance with requirements.

2. Inspect for and remove shipping bolts, blocks, and tie-down straps.

3. Operational Test: After electrical circuitry has been energized, start unit to
confirm proper motor rotation and unit operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning
controls and equipment.

5. Remove and replace malfunctioning units and retest as specified above.

3.3 CLEANING AND ADJUSTING

A.

Occupancy Adjustments: When requested within 12 months of date of Substantial
Completion, provide on-site assistance in adjusting system to suit actual occupied
conditions. Provide up to two visits to site during other-than-normal occupancy hours
for this purpose.

After completing system installation and testing, adjusting, and balancing unit and
air-distribution systems, clean filter housings and install new filters.

END OF SECTION

13089K