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SEQUENCE OF OPERATION
CONTINUOUS FAN
a.
Thermostat closes circuit R to G energizing the
(1.)
blower motor for continuous fan. The indoor
fan is energized on low speed.
COOLING MODE
b.
Low Stage: Thermostat closes R to G, R to Y1
(1.)
and R to O. The compressor and indoor fan are
energized on low speed. The outdoor fan and
reversing valve are energized.
High Stage: Thermostat closes R to G, R to Y1,
(2.)
R to Y2, and R to O. The compressor and
indoor fan are energized on high speed. The
outdoor fan and reversing valve are energized.
ELECTRIC HEATING MODE
c.
(1.) Thermostat closes circuit R to W2 or W3,
and R to G. There are no on or off delays.
HEAT PUMP HEATING MODE
d.
Low Stage: Thermostat closes circuits R to G
(1.)
and R to Y1. The compressor and indoor fan
UNIT SIZE
NOMINAL CAPACITY (ton)
OPERATING WEIGHT lb (kg)
COMPRESSOR TYPE
Refrigerant (R- -410A) Quantity lb
Quantity (kg)
EXPANSION DEVICE - - HEATING
ORIFICE OD (in.) - - Left
ORIFICE OD (in.) - - Right
EXPANSION DEVICE - - COOLING
SIZE
PART NUMBER
OUTDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
OUTDOOR FAN
Nominal Airflow (CFM)
Diameter Motor HP (RPM)
INDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
INDOOR BLOWER
Nominal Low Stage Airflow (CFM)
Nominal High Stage Airflow (CFM)
Blower Wheel Size in. x in. (mm)
(mm x mm)
Motor (HP)
HIGH- -PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
LOSS- -OF- -CHARGE/LOW- -
PRESSURE SWITCH
(Liquid Line) (psig)
Cutout
Reset (Auto)
RETURN- -AIR FILTERS* Throwaway in.
* Recommended filter sizes for field--installed air filter grilles mounted on the wall or ceiling of the conditioned structure. Required filter sizes shown
are based on the ARI (Air conditioning and Refrigeration Institute) rated high stage cooling airflow and a maximum face velocity of 300 ft/minute for
throwaway type or 450 ft/minute for permanent filters. Air filter pressure drop for non--standard filters must not exceed 0.08 IN. W.C.
Table 2—Minimum Airflow for Reliable Electric Heater Operation (CFM)
SIZE
AIRFLOW (CFM)
Table 1—Physical Data - - Unit PHN5
PHN524
2
405 (184)
10.3
(4.67)
0.042
N/A
2 TON
EA36YD129
2...21
13.6
2700
22
1/8 (825)
3...17
3.7
600
800
10x10
(254x254)
1/2
20x24x1
(mm)
(508x610x25)
PHN524
800
are energized on low speed. The outdoor fan
is also energized.
High Stage: Thermostat closes R to G, R to Y1,
(2.)
and R to Y2. The compressor and indoor fan
are energized on high speed. The outdoor fan
is also energized.
HEAT PUMP HEATING WITH AUXILIARY
e.
ELECTRIC HEAT
Thermostat closes circuits R to G, R to Y2 and
(1.)
R to W2 or W3. The compressor and indoor fan
are energized on high speed. The outdoor fan
and electric heat relays are also energized.
DEFROST MODE
f.
The defrost mode is automatically energized by
the defrost board during heating mode. The
defrost board energizes "O" (reversing valve)
and "W2" (electric heat). It also de--energizes the
outdoor fan. When defrost is complete, unit will
return to heating mode. If room thermostat is
satisfied during defrost, unit will shut down and
restart in defrost on next call for heat.
PHN536
3
464 (210)
TWO STAGE SCROLL COMPRESSOR
9.7
(3.99)
FIXED ORIFICE
0.035
0.035
TXV
3 TON
EA36YD139
EA36YD149
2...21
17.5
2800
22
1/8 (825)
3...17
4.7
850
1200
11x10
(279x254)
3/4
670±15
470±25
23±5
55±5
24x30x1
(610x762x25)
PHN536
PHN548
1250
1710
PHN548
PHN560
4
5
492 (223)
535 (256)
15.5
16.0
(7.03)
(7.3)
0.038
0.046
0.046
0.046
4 TON
5 TON
EA36YD159
2...21
2...21
19.4
23.3
3300
3300
22
22
1/4 (1100)
1/3 (1110)
3...17
4...17
5.7
5.7
1100
1200
1600
1750
11x10
11x10
(279x254)
(279x254)
1.0
1.0
24x36x1
(610x914x25)
PHN560
1800
11
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