11
SEQUENCE OF OPERATION
a.
CONTINUOUS FAN
(1.)
Thermostat closes circuit R to G energizing the
blower motor for continuous fan. The indoor
fan is energized on low speed.
b.
COOLING MODE
(1.)
Low Stage: Thermostat closes R to G, R to Y1
and R to O. The compressor and indoor fan are
energized on low speed. The outdoor fan and
reversing valve are energized.
(2.)
High Stage: Thermostat closes R to G, R to Y1,
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.
c.
ELECTRIC HEATING MODE
(1.) Thermostat closes circuit R to W2 or W3,
and R to G. There are no on or off delays.
d.
HEAT PUMP HEATING MODE
(1.)
Low Stage: Thermostat closes circuits R to G
and R to Y1. The compressor and indoor fan
are energized on low speed. The outdoor fan
is also energized.
(2.)
High Stage: Thermostat closes R to G, R to Y1,
and R to Y2. The compressor and indoor fan
are energized on high speed. The outdoor fan
is also energized.
e.
HEAT PUMP HEATING WITH AUXILIARY
ELECTRIC HEAT
(1.)
Thermostat closes circuits R to G, R to Y2 and
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.
f.
DEFROST MODE
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.
Table 1—Physical Data -- Unit PHN5
UNIT SIZE
PHN524
PHN536
PHN548
PHN560
NOMINAL CAPACITY (ton)
2
3
4
5
OPERATING WEIGHT lb (kg)
405 (184)
464 (210)
492 (223)
535 (256)
COMPRESSOR TYPE
TWO STAGE SCROLL COMPRESSOR
Refrigerant (R--410A) Quantity lb
Quantity (kg)
10.3
(4.67)
9.7
(3.99)
15.5
(7.03)
16.0
(7.3)
EXPANSION DEVICE -- HEATING
FIXED ORIFICE
ORIFICE OD (in.) -- Left
0.042
0.035
0.038
0.046
ORIFICE OD (in.) -- Right
N/A
0.035
0.046
0.046
EXPANSION DEVICE -- COOLING
TXV
SIZE
2 TON
3 TON
4 TON
5 TON
PART NUMBER
EA36YD129
EA36YD139
EA36YD149
EA36YD159
OUTDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
2...21
13.6
2...21
17.5
2...21
19.4
2...21
23.3
OUTDOOR FAN
Nominal Airflow (CFM)
Diameter Motor HP (RPM)
2700
22
1/8 (825)
2800
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/3 (1110)
INDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
3...17
3.7
3...17
4.7
3...17
5.7
4...17
5.7
INDOOR BLOWER
Nominal Low Stage Airflow (CFM)
Nominal High Stage Airflow (CFM)
Blower Wheel Size in. x in. (mm)
(mm x mm)
Motor (HP)
600
800
10x10
(254x254)
1/2
850
1200
11x10
(279x254)
3/4
1100
1600
11x10
(279x254)
1.0
1200
1750
11x10
(279x254)
1.0
HIGH--PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
670
±
15
470
±
25
LOSS--OF--CHARGE/LOW--
PRESSURE SWITCH
(Liquid Line) (psig)
Cutout
Reset (Auto)
23
±
5
55
±
5
RETURN--AIR FILTERS* Throwaway in.
(mm)
20x24x1
(508x610x25)
24x30x1
(610x762x25)
24x36x1
(610x914x25)
* 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
PHN524
PHN536
PHN548
PHN560
AIRFLOW (CFM)
800
1250
1710
1800
