Transformer Protection - Carrier PHR524000K 0B1 Series Installation Instructions Manual

If an accessory electric heater is installed, low voltage leads from
heater must be connected to factory supplied control leads from
Indoor Fan Board P4 connector.
NOTE: If the unit 24V wires do not have a matching receptacle,
cut the 24V wires from the electric heater plug, strip the ends, and
wire nut together to match the schematic connections. If the electric
heater 24V wires do not have a matching plug, cut the 24V wires
from the unit receptacle, strip the ends, and wire nut together to
match the schematic connections.
Factory wires are provided for electric heat staging W1 and W2
(W2 and W3 on IFB). If room thermostat has only one stage of
UNIT SIZE
NOMINAL CAPACITY (ton)
SHIPPING WEIGHT lb.
SHIPPING WEIGHT (kg)
COMPRESSORS
Quantity
REFRIGERANT (R --- 410A)
Quantity lb
Quantity (kg)
REFRIGERANT METERING DEVICE
ORIFICE
ID (in.)
ID (mm)
OUTDOOR COIL
Rows...Fins/in.
Face Area (sq ft)
OUTDOOR FAN
Nominal Cfm
Diameter in.
Diameter (mm)
Motor Hp (Rpm)
INDOOR COIL
Rows...Fins/in.
Face Area (sq ft)
INDOOR BLOWER
Nominal Low Stage Cooling Airflow (Cfm)
Nominal High Stage Cooling Airflow (Cfm)
Size in.
Size (mm.)
Motor HP (RPM)
HIGH --- PRESSURE SWITCH
(psig) Cut--- out Reset (Auto)
LOW --- PRESSURE SWITCH
(psig) cut--- out Reset (auto)
RETURN--- AIR FILTERS†}
Throwaway Size in.
Throwaway Size (mm)
{ Required filter sizes shown are based on the larger of the AHRI (Air Conditioning Heating and Refrigeration Institute) rated cooling airflow or the heating air-
flow velocity of 300 ft/minute for throwaway type or 450 ft/minute for high ---capacity type. Air filter pressure drop for non ---standard filters must not exceed 0.08
in. W.C.
} If using accessory filter rack refer to the filter rack installation instructions for correct filter sizes and quantity.
SIZE 24
Cfm 850
10
Table 1 – Physical Data
24 30
2 2 ---1/2
393
347
157 178
8.2 11.2
3.7 5.1
.032 (2) .035 (1)
0.81 (2) .89 (1)
1...21 2...21
18.8 18.8
2100 2500
24 24
609.6 609.6
1/12 (800) 1/8 (810)
3...17 3...17
3.7 3.7
675 675 775 775
855 1000
10x10 10x10
254x254 254x254
1/2 (1050) 1/2 (1050)
20x20x1 20x24x1
508x508x25 508x610x25
Table 2 – Minimum Airflow for Safe Electric Heater Operation (CFM)
30
1000
Specifications are subject to change without notice.
supplemental heat, connect white and violet wires shown in Fig. 10
to second stage heat field wire.
Some electric heaters have four control wires (plus common wire).
Consult unit wiring diagram and electric heater wiring diagram for
additional details.

TRANSFORMER PROTECTION

The transformer is of the energy- -limiting type, however a direct
short will likely blow a secondary fuse. If an overload or short is
present, correct overload condition and check for blower fuse on
Indoor Fan Board. Replace fuse as required with correct size and
rating.
36 42
3 3 ---1/2
420 466
191 212
Scroll
1
11.0 14.6
5.0 6.6
TXV, Indoor TXV
.
.038 (1) 042 (2) .042 (2)
.97 (1) 1.07 (2) 1.07 (2)
2...21 2...21
13.6 19.4
3000 3000
26 26
660.4 660.4
1/5 (810) 1/5 (810)
3...17 3...17
4.7 4.7
900 900 1050 1050
1200 1400
11x10 11x10
279.4x254 279.4x254
3/4 (1000) 3/4 (1075)
650 +/ --- 15
420 +/ --- 25
20 +/ --- 5
45 +/ --- 5
24x30x1
610x762x25
36 42
1200 1400
48 60
4 5
462 511
210 232
12.0 14.8
5.4 6.7
.042 (2) .052 (2)
1.07 (2) 1.32 (2)
2...21 2...21
17.5 23.3
3300 3600
26 26
660.4 660.4
1/5 (810) 1/5 (810)
3...17 4...17
5.7 5.7
1200 1200 1400 1400
1600 1750
11x10 11x10
279.4x254 279.4x254
1.0 (1075) 1.0 (1075)
24x36x1
610x914x25
48 60
1600 1750
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