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GUIDE SPECIFICATIONS — PH1S090 OUTDOOR UNIT

SPLIT-SYSTEM HEAT PUMP OUTDOOR UNIT

HVAC GUIDE SPECIFICATIONS— SECTION 15678
SIZE RANGE: 50,000 to 83,000 Nominal Btuh Heating

⁄

Nominal Tons Cooling

MODEL NUMBER: PH1S090

PART 1 — GENERAL

1.01 SYSTEM DESCRIPTION

A. Outdoor-mounted, electrically controlled, air-cooled split

system heat pump unit utilizing a reciprocating-type semi-
hermetic compressor for refrigerant compression. Unit
shall function as the outdoor component of an air-to-air
electric heat pump system.

B. Unit shall be used in a refrigerant circuit to match Pack-

aged Air-Handling Unit, Section 15859, for matched sys-
tem approved by manufacturer.

1.02 QUALITY ASSURANCE

A. Unit performance shall be certified in accordance with ARI

Standards 210/240 and 270, latest versions.

B. The refrigerant coil shall be designed and tested in accor-

dance with ASHRAE 15 Safety Code for Mechanical
Refrigeration.

C. Unit shall be constructed in accordance with UL and UL,

Canada regulations and shall carry the UL and UL,
Canada labels of approval. Units shall be manufactured in
a facility registered to the ISO 9002 manufacturing quality
standard.

D. Coil leak testing shall be at 300 psig air pressure with the

coil submerged in water. After testing, the coil shall be de-
hydrated and charged with dry air.

E. Unit casing shall be capable of withstanding Federal Test

Method Standard No. 141 (method 6061) 500-hour salt
spray test.

1.03 DELIVERY, STORAGE, AND HANDLING

Unit shall be stored and handled in accordance with unit
manufacturer’s instructions.

PART 2 — PRODUCTS

2.01 EQUIPMENT

A. General:

Outdoor-mounted, air-cooled split system heat pump unit
shall be suitable for on-the-ground or rooftop installation
on a full level pad or on raised pads at each support point.
The unit shall consist of a semi-hermetic reciprocating
compressor, a fin-tube coil, propeller-type fan, fan motor,
refrigeration control devices, and a control box. All com-
ponents shall be factory assembled as a single unit. A
holding charge of R-22 shall be included. Units shall be
used in a refrigeration circuit matched with a PF1B090
packaged air-handling unit.

B. Unit Cabinet:

1. Cabinet shall be constructed of galvanized steel,

bonderized, and finished with baked enamel.

2. Fan venturi housings and guards shall be assembled

on the unit.

3. A removable panel shall be provided for access to

compressor and control compartments.

4. A refrigerant accumulator with a fusible plug relief

shall be installed in the cabinet.

5. Lifting holes shall be provided to facilitate rigging.

C. Fan:

1. Propeller fan shall be directly driven by weather-proof

motors. Fan motor bearings shall be permanently
lubricated.

2. Fan shall be arranged for vertical discharge.

D. Compressor/Motor Assembly:

1. Semi-hermetic, reciprocating-type compressor shall

be complete with a motor and oil pump all on a single
polished crankshaft.

2. Motor stator winding shall be NEMA Class F rated,

suitable for operation in a refrigerant atmosphere.

3. Oil pump shall be automatically reversible.
4. Casing shall include discharge shutoff valves, oil level

control orifice, oil-pressure regulating valve, and a
crankcase oil heater.

5. Suction and discharge manifold valves shall be Swed-

ish steel, reed-type flapper valves.

6. Pistons and connecting rods shall be high-density alu-

minum alloy castings. Pistons shall be equipped with
automotive-type compression and oil scraper rings.

7. Pump-end bearing shall be cast aluminum. Motor-end

bearing shall be steel-backed, tin-base babbit type.

8. Compressor assembly shall be installed on spring vi-

bration isolators.

E. Coil:

Coil shall have copper tubes, aluminum plate fins, and
galvanized steel tube sheets. The fins shall be bonded to
tubes by mechanical expansion. Coil shall be circuited for
subcooling in cooling mode operation.

For refrigerant control, the unit shall be equipped with a
liquid line, suction line, and compressor discharge service
valves. The unit shall include an accumulator with a fus-
ible plug relief and a reversing valve for effective heat
pump operation. Each unit system shall have 3 service
ports: one on the suction line, one on the liquid line, and
one on the compressor discharge line. Each port shall be
capped for leaktightness.

F. Controls and Safeties:

Operating controls and safeties shall be factory selected,
assembled, and tested. Minimum control functions shall
be as listed below:

1. Controls:

Time-delay restart control to prevent compressor
short-cycling.

Defrost control to consist of a time and tempera-
ture activated system that initiates defrost mode
at selectable intervals of 30, 50, or 90 minutes in
response to a temperature signal.

2. Safeties:

High discharge pressure cutout switch.

Loss-of-charge cutout switch.

Compressor motor current and temperature over-
load cutouts.

Five-minute recycle protection to prevent com-
pressor short cycling.

Device to hold the compressor off-line until
manual reset at the thermostat when any of the
following are tripped: High discharge pressure,
high compressor motor temperature, or loss of
charge.