Finance Committee

15780-4
PACKAGED ROOFTOP AIR HANDLING UNITS

2.2

15780-3
PACKAGED ROOFTOP AIR HANDLING UNITS

provide anti-short cycle timing and time delay between compressors.

Phase monitor: Phase monitor shall provide 100% protection for motors and
compressors against problems caused by phase loss, phase imbalance, and phase
reversal. The module shall automatically reset from a fault condition.

Accessories: Factory-mounted disconnect switch and GFCI duplex electrical service
outlet.

Om

15780-2
PACKAGED ROOFTOP AIR HANDLING UNITS

3. York.

4. Or approved equal.

15780-1

SECTION 15780

PACKAGED ROOFTOP AIR HANDLING UNITS

PART 1 - GENERAL

1.1

1.2

1.3

DESCRIPTION

A.

Work Included: Furnish and install packaged cooling-only rooftop air handling units
(RTU) of the size and capacity as shown on the Drawings. Unit shall include
compressor, condenser coil, fans, motors, refrigerant reservoir, charging valve,
holding charge of R-410A, refrigeration specialties and integral control panel,
completely packaged, piped, wired and assembled suitable for outside installation.

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

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.

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.

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:

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.

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: