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50VT-K: Installation Instruction
c. ELECTRIC HEATING MODE
(1.) Thermostat closes circuit R to W/W1, or W2 and R to G.
There are no on or off delays.
d. HEAT PUMP HEATING MODE
(1.) Thermostat closes circuits R to G and R to Y. The
compressor, indoor and outdoor fans are energized.
e. HEAT PUMP HEATING WITH AUXILIARY ELECTRIC
HEAT
Unit Size
Shipping Weight
Compressor Quantity
Type
Refrigerant
Refrigerant Quantity (lb)
Quantity (kg)
Refrigerant Metering Device
Orifice ID (in)
(mm)
Orifice OD (in)
(mm)
Outdoor Coil
Rows...Fins/in,
face area (sq. ft.)
Outdoor Fan
Nominal Airflow (cfm)
Diameter (in.)
Diameter (mm)
Motor hp (rpm)
Indoor Coil
Rows...Fins/in,
face area (sq. ft.)
Indoor Blower
Nominal Airflow (cfm)
Size (in.)
Size (mm)
Motor hp (rpm)
High Pressure Switch (psig)
Cutout
Reset (Auto)
Loss-of-Charge/Low Pressure Switch (psig)
Cutout
Reset (Auto)
Return Air Filters
disposable
*. For 460 volt units, add 14 lb (6.4 kg) to the weight.
†. Required filter sizes shown are based on the larger of the AHRI (Air Conditioning Heating and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300-350
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 size and quantity.
SIZE
AIRFLOW (CFM)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
24
2
*
343
(lb)
155.6
(kg)
7.25
3.3
0.032 (2)
0.81 (2)
1...21
18.8
3000
24
610
1/10 (810)
3...15
3.7
750
10 x 10
254 x 254
1/2
2 each 20x12x1 in.
†
508x305x25 mm
Table 2 – Minimum Airflow for Reliable Electric Heater Operation (CFM)
24
30
800
1025
(1.) Thermostat closes circuits R to G, R to Y and R to W/W1 or
W2. The compressor, indoor and outdoor fans are
energized, as well as the electric heat relays.
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
30
36
2.5
3
376
420
170.6
190.6
11.5
10.4
5.2
4.7
Indoor TXV, Outdoor Dual Accuraters
N/A
0.035 (2)
0.040 (2)
0.89 (2)
1.02 (2)
2...21
1...21
18.8
23.3
3500
3500
24
26
610
660
1/5 (810)
1/5 (810)
3...17
3...17
3.7
4.7
950
1150
10 x 10
11 x 10
254 x 254
279 x 254
1/2
1/2
1 each 24x14x1in.
610x356x25 mm
24x16x1 in.
610x406x25 mm
36
1250
11
42
48
3.5
4
440
440
199.6
199.6
1
Scroll
R-410A
10.5
10.0
4.8
4.5
Indoor
Accurater,
Outdoor
Dual
Accuraters
0.080 (1)
2.03 (1)
0.046 (2)
0.046 (2)
1.17 (2)
1.17 (2)
1...21
2...21
23.3
13.6
3500
3500
26
26
660
660
1/5 (810)
1/5 (810)
3...17
3...17
4.7
5.6
1350
1600
11 x 10
11 x 10
279 x 254
279 x 254
3/4
1
650 +/- 15
420 +/- 25
20 +/- 5
45 +/- 10
1 each 24x16x1 in.
610x406x25 mm
24x18x1 in.
610x457x25 mm
42
48
1400
1710
60
5
510
231.4
13.25
6.0
Indoor TXV,
Outdoor Dual
Accuraters
N/A
0.046 (2)
1.17 (2)
2...21
17.5
3500
26
660
1/5 (810)
3...17
5.6
1750
11 x 10
279 x 254
1
60
1800
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