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15626-1

SECTION 15626

HVAC SYSTEM PUMPS (IN-LINE CIRCULATORS)

PART 1 - GENERAL

1.1 DESCRIPTION
A. Work Included: Provide and install horizontal inline centrifugal single stage pumps
with the capacities and characteristics as shown on the equipment schedules.
B. Related Work Specified Elsewhere: "HVAC - General" is specified in this Division.

12 QUALITY ASSURANCE

A. Verification of Unit Output: Equipment shall be supplied with manufacturer's
certificate and pump curve for rated performance, horsepower, etc.

B. Acceptable Manufacturers:
1. Grundfos
2. Taco
3. Aurora
4. __ Bell and Gossett Company

PART 2 - PRODUCTS

2.1 MATERIALS
A. All pump casings shall be centerline discharge of cast iron designed for line mounting.
All pumps are to be provided with companion flanges. Units shall have a maximum
operating pressure of 175psig at a maximum operating temperature of 300° F.
B. Pumps shall have a cast bronze impeller and shall be dynamically balanced. Suction
and discharge flanges shall be provided with drilled and tapped gauge ports.
Pump shall be canned-rotor type, the pump and motor form an integral unit without
shaft seal and with only two gaskets for sealing. The bearings are lubricated by the
pumped liquid.
Controller shall be integrated in the control box.
Pump shall contain built-in differential-pressure and temperature sensor.
Rotor can shall be made of carbon-fiber-reinforced composite.
Stainless-steel bearing plate and rotor cladding.
Aluminium alloy stator housing.
Air-cooled power electronics.

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PART 3 - EXECUTION

3.1 INSTALLATION
A. Install using manufacturer's recommendations and as shown on the Drawings.
B. Install so no vibration is transmitted to piping system. Provide independent support
and flexible connections as required to eliminate pipeline vibration.
C. Fully lubricate pump in accordance with manufacturer's recommendations prior to
start-up.

13089K

15626-2
HVAC SYSTEM PUMPS (IN-LINE CIRCULATORS)

3.2 ADJUSTING
A. Test and run complete heating system under actual working conditions and adjust the
unit to the satisfaction of the Engineer.

END OF SECTION

13089K

15671-1

SECTION 15671

DUCTLESS SPLIT SYSTEM HEAT PUMP UNITS

PART 1 - GENERAL

1.1 DESCRIPTION
A. Work Included: Furnish and install ductless split system heat pump systems of the
size and capacities as shown on the drawings. Each unit shall include an outdoor
condensing unit, high wall mounted direct expansion fan coil unit, refrigeration
specialties, refrigerant charge and wired remote control.
B. Related Work Specified Elsewhere.
1. "HVAC - General" is specified in this Division.

12 QUALITY ASSURANCE
A. Each system shall be rated and certified in accordance with ARI Standards 210/240
and 270. Components shall be listed in the ARI directory as matched sets (systems).
B. Unit construction shall comply with ANSI/ASHRAE 15, latest revision, the NEC and
be constructed in accordance with UL standards and shall carry the UL label of
approval.

PART 2 - PRODUCTS

2.1 MATERIALS
A. Condensing Unit
1. Unit Cabinet:

a. The casing shall be constructed from galvanized steel plate, finished with
an electrostatically applied, thermally fused acrylic or polyester powder
coating for corrosion protection and have a Munsell 3Y 7.8/1.1 finish.

b. Mounting feet shall be provided and shall be welded to the base of the
cabinet and be of sufficient size to afford reliable equipment mount and
stability.

c. Easy access shall be afforded to all serviceable parts by means of
removable panel sections.

d. The fan grill shall be of ABS plastic.

2. Fans:

a. The fan blades shall be of aerodynamic design for quiet operation, and the
fan motor bearings shall be permanently lubricated.

b. Theunit shall have horizontal discharge airflow. The fan shall be mounted
in front of the coil, pulling air across it from the rear and dispelling it
through the front. The fan shall be provided with a raised guard to prevent
external contact with moving parts

3. | Compressor:

a. The compressor shall be a DC twin-rotor rotary compressor with variable

speed inverter drive.

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15671-2
DUCTLESS SPLIT SYSTEM HEAT PUMP UNITS

b. The compressor shall be driven by inverter circuit to control compressor
speed. The compressor speed shall dynamically vary to match the room
load for significantly increasing the efficiency of the system which shall
result in significant energy savings.

c. The unit shall have an accumulator and high pressure safety switch.

d. The compressor shall be mounted to avoid the transmission of vibration.

Outdoor Coil:

a. The condenser coil shall be of copper tubing with flat aluminum. The coil
shall be protected with an integral metal guard.

Refrigerant Components:

a. Refrigerant circuit components shall include brass external liquid line
service valve with service gauge port connections, suction line service
valve with service gage connection port, service gage port connections on
compressor suction and discharge lines with Schrader type fittings with
brass caps, accumulator, reversing valve.

b. All refrigerant lines between outdoor and indoor units shall be of annealed,
refrigeration grade copper tubing, ARC Type, meeting ASTM B280
requirements, individually insulated in twin-tube, flexible, closed-cell,
CFC-free (ozone depletion potential of zero), elastomeric material for the
insulation of refrigerant pipes and tubes with thermal conductivity equal
to or better than 0.27 BTU-inch/hour per sqft / °F, a water vapor
transmission equal to or better than 0.08 Perm-inch and superior fire
ratings such that insulation will not contribute significantly to fire and up
to 1" thick insulation shall have a Flame-Spread Index of less than 25 and
a Smoke-development Index of less than 50 as tested by ASTM E 84 and
CAN / ULC S-102.

Safeties:

Operating safeties shall be factory selected, assembled, and tested. The

minimum functions shall include the following:

a. Compressor discharge over temperature protection.

b. System low voltage protection.

c. Compressor overload protection.

d. Compressor over current protection.

e. IPM module protection.

Electrical Requirements:

a. Power for the indoor unit shall be supplied from the outdoor unit.

b. Unit electrical power shall be a single point connection.

c. All power and control wiring must be installed per NEC and all local
electrical codes.

d. Units shall have high and low-voltage terminal block connections.

BB. Fan Coil Unit

l.

Unit Cabinet:

The cabinet shall be formed from high strength molded plastic with smooth
finish, flat front panel design with access for filter. Cabinet color shall be white
- Munsell 1.0Y 9.2/0.2. The unit shall be wall mounted by means of a factory
supplied, pre-drilled, mounting plate.

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15671-3
DUCTLESS SPLIT SYSTEM HEAT PUMP UNITS

Fans:

a. The unit fan shall be high performance, double inlet, forward curve, direct
drive sirocco fan with a single motor. The fans shall be statically and
dynamically balanced and run on a motor with permanently lubricated
bearings. The indoor fan shall consist of three (3) speeds: Low, Mid, and
Hi and Auto. The fan shall have a selectable Auto fan setting that will
adjust the fan speed based on the difference between controller set-point
and space temperature.

b. There shall be a motorized horizontal vane to automatically direct air flow
in a horizontal and downward direction for uniform air distribution. The
horizontal vane shall significantly decrease downward air resistance for
lower sound levels, and shall close the outlet port when operation is
stopped. There shall also be a set of vertical vanes to provide horizontal
swing airflow movement.

Coil:
The evaporator coil shall be of nonferrous construction with pre-coated
aluminum strake fins on copper tubing. The multi-angled heat exchanger shall
have a modified fin shape that reduces air resistance for a smoother, quieter
airflow. All tube joints shall be brazed with PhosCopper or silver alloy. The
coils shall be pressure tested at the factory. A condensate pan and drain shall
be provided under the coil. A drain pan level switch, designed to connect to the
control board, shall be provided and installed on the condensate pan to prevent
condensate from overflowing.
Controls:
The control system shall consist of a minimum of two (2) microprocessors, one
on each indoor and outdoor unit, interconnected by a single non-polar two-wire
cable. The microprocessor located in the indoor unit shall have the capability
of monitoring return air temperature and indoor coil temperature, receiving and
processing commands from a wireless or wired controller, providing emergency
operation and controlling the outdoor unit. The control signal between the
indoor and outdoor unit shall be pulse signal 24 volts DC. Indoor units shall
have the ability to control supplemental heat via 12 VDC output.

The unit shall have the following functions as a minimum:

a. Automatic restart after power failure at the same operating conditions as
at failure.

b. A timer function to provide a minimum 24-hour timer cycle for system
Auto Start/Stop.

c. Temperature sensing control to enter set points and operating conditions.

d. Automatic air sweep control to provide on or off activation of air sweep
louvers.

e. Dehumidification mode shall provide increased latent removal capability
by modulating system operation and set point temperature.

f. Fan-only operation to provide room air circulation when no cooling is
required.

g. Diagnostics shall provide continuous checks of unit operation and warn of
possible malfunctions. Error messages shall be displayed at the unit.

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15671-4
DUCTLESS SPLIT SYSTEM HEAT PUMP UNITS

h. Fan speed controls shall be user-selectable: high, medium, low or
microprocessor controlled automatic operation during all operating
modes.

The unit shall be protected against the following:

i. Indoor coil freeze-up.

j. Indoor coil high temperature protection shall be provided to detect
excessive indoor discharge temperature when unit is in heat pump mode.

5. Filters:
Units shall have filter rack with factory-supplied washable filter.
C. Systems shall be:

1. Mitsubishi
2. Daitkin
3. Or equal

PART 3 - EXECUTION

3.1 INSTALLATION
A. All system components shall be installed in strict accordance with the manufacturer’ s
instructions, recommendations and as shown on the Drawings.

3.2 STARTUP, TESTING, AND TRAINING
A. Provide startup, testing and training in accordance with the requirements of Section
01800.

END OF SECTION

13089K

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

15732-1

SECTION 15732

CONVERTORS

PART 1 - GENERAL

1.1 DESCRIPTION

A.

B.

Work Included: Furnish and install steam to hot water convertor(s) of type, location,
and capacity as shown on the Drawings.

Related Work Specified Elsewhere: "HVAC - General" is specified in Section 15600;
“Hydronic Heating Systems Piping and Specialties” is specified in Section 15601;
and “Steam Heating Systems Piping and Specialties” is specified in Section 15602.

1.2 QUALITY ASSURANCE

A.

Acceptable Manufacturers:
1. Taco

2. Bell & Gossett

3. Or approved equal

1.3 SUBMITTALS TO THE ENGINEER

A.

Submit shop drawings, manufacturer’s data and operating instructions in accordance
with the General Conditions and Sections 01340.

PART 2 - PRODUCTS

2.1 MATERIALS

A.

B.

Unit(s) shall be of 125# ASME Section VIII construction for tube and shell side and
be furnished with cast iron cradles for support.

Carbon steel shell designed for "U" tube bundle construction complete with cast iron
bonnet.

Total water pressure drop through the heater at rated flow shall not exceed 5 feet of
water.

Unit(s) for Domestic Hot Water heating shall have "U" tubes of 3/4" OD seamless
copper tubing with copper alloy supports and copper silicon tube sheet.

Unit(s) for service water heating shall have "U" tubes of 3/4" OD seamless copper
tubing with copper alloy supports, and steel or copper silicon tube sheet.

PART 3 - EXECUTION

3.1 INSTALLATION

A.

Install steam to hot water convertor(s) in accordance with manufacturer's instructions
and recommendations as shown on the Drawings.

END OF SECTION

13089K

15750-1

SECTION 15750

HOT WATER COILS

PART 1 - GENERAL

1.1 DESCRIPTION
A. Work Included: Provide and install hot water heating coils of the types, sizes and

B.

capacities shown on the drawings.
Related Work Specified Elsewhere: "HVAC - General" is specified in this division.

1.2 QUALITY ASSURANCE

A.

B.

Verification of Operating Data: Capacities, pressure drops and selection procedures
shall be certified in accordance with ARI Standard 410.

Tests - All coils shall be proof tested at 1.5 times maximum working pressure, then
leak tested at maximum working pressure. Minimum test pressures are 300psig proof
test and 200psig leak test.

Acceptable Manufacturers:

1. USA Coil & Air

2. American Air Filter
3. Durham-Bush

4. McQuay, Inc.

5. Trane Company

6. Or approved equal.

1.3 SUBMITTALS TO THE ENGINEER

A.

Shop Drawings shall be submitted as required by the general conditions. Shop
drawings shall consist of, but not be limited to, the following:

1. Manufacturer's certificate of operating data for each coil.

2. Dimensional data for each coil.

PART 2 - PRODUCTS

2.1 MATERIALS

A.

B.

Tubes - Round 5/8-inch copper tubes expanded into full fin collars for permanent fin-
tube bond and expanded into cast iron headers for permanent leak-tight joint.

Fins - Configurated, plate-type aluminum or copper fins with full fin collars for
maximum fin-tube contact and accurate spacing, mechanically bonded to tubes for
permanent fin-tube bond.

Casings - 16-gauge galvanized steel casings, center and end supports are provided on
all coils with header heights 33 inches or less.

Headers - Gray cast iron (finely dispersed graphite, peralitic) for 12 through 33-inch
header heights.

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15750-2
HOT WATER COILS

PART 3 - EXECUTION

3.1 INSTALLATION
A. Install in strict accordance with the manufacturer's instructions and recommendations
and as shown on drawings.
B. Install with shut off valves, control valves, balancing valves, air vents and duct
transitions as required for unit operation and balancing.

END OF SECTION

13089K