213B
Legacyt Line Heat Pump
with Puronr Refrigerant
1 1/2 To 5 Nominal Tons
Wiring Diagrams
CONNECTION DIAGRAM
*CHS
BLK
or
RED
BLK
*CH
BLK
CONT
RED or BLK
L1
208/230 1Ø
POWER
SUPPLY
L1
L2
BLU
BLK
11
21
23
23
BLK
COMP BLU
S
H
C
C
R
YEL
CAP
BLU
BRN
YEL
*SC
BRN
5
*SR
EQUIP
GND
* CHS
YEL
RED
RED
RVS
*HPS
BLU/PNK
Y
DR
OF1
OF2
O
R
SPEED UP
C Y O W2 R E L W3 G
C Y O W2 R E L
-LEGENDFACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT BOARD
COMPONENT CONNECTION
1/4-INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
CAP
JUNCTION
CAPACITOR (DUAL RUN)
*CH
CRANKCASE HEATER
*CHS
CRANKCASE HEATER SWITCH
COMP
COMPRESSOR
CONT
CONTACTOR
CB
CIRCUIT BOARD
DFT
DEFROST THERMOSTAT
C
RVS
ORN
SPEED
UP
PNK
PNK
DFT
INDOOR UNIT
TERMINAL BLOCK
G INDOOR THERMOSTAT (NOTE #5)
NOTES:
1. Compressor and fan motor furnished
with inherent thermal protection.
2. To be wired in accordance with national
electric code (N.E.C.) And local codes.
3. N.E.C. Class 2, 24 V circuit, min. 40 va
required, 60va on units installed with LLS.
4. Use copper conductors only from
disconnect to unit.
5. Must use thermostat and sub-base as
stated in pre-sale literature.
6. If indoor section has a transformer
with a grounded secondary, connect the
grounded side to "C" on the circuit board.
7. If any of the original wire, as supplied, must
be replaced, use the same or equivalent wire.
8. Check all electrical connections inside
control box for tightness.
9. Do not attempt to operate unit until
service valves have been opened.
10. Use conductors suitable for at least
75ºC (167ºF).
CAUTION
CIRCUITRY
CONT
C
*HPS
*DTS
90
60 FIELD SELECTED TIME PERIOD
30 BETWEEN DEFROST CYCLES (MINUTES)
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLE
HEAT CYCLE: 90 MIN. ACCELERATED TO 21 SEC.
60 MIN. ACCELERATED TO 14 SEC.
30 MIN. ACCELERATED TO 7 SEC.
DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.
CONDENSING UNIT CHARGING INSTRUCTIONS
For use with units using R-410A refrigerant
HK32EA001
1. Compressor damage may occur if system is
over charged.
2. This unit is factory charged with R-410A in
DISCHARGE TEMP. SWITCH
*DTS
accordance with the amount shown on the rating
HIGH PRESSURE SWITCH
*HPS
plate. The charge is adequate for most systems
using matched coils and tubing not over 15 feet long.
LIQUID LINE SOLENOID VALVE
*LLS
Check refrigerant charge for maximum efficiency.
LOW PRESSURE SWITCH
*LPS
See Product Data Literature for required Indoor air
OUTDOOR FAN MOTOR
OFM
Flow Rates and for use of line lengths over 15 feet.
REVERSING VALVE SOLENOID
RVS
3. Relieve pressure and recover all refrigerant before
system repair or final disposal. Use all service ports
START CAPACITOR
*SC
and open all flow-control devices, including solenoid
START RELAY
*SR
valves.
START THERMISTOR
*ST
4. Never vent refrigerant to atmosphere.
* MAY BE FACTORY OR FIELD INSTALLED
Use approved recovery equipment.
DEFROST RELAY AND
*LPS
ORN
DFT
C Y O W2 R
T1
BRN/YEL
C
LOGIC
DR
YEL/BLU
C
DFT
LOGIC
Y Y
T1
YEL WHT
BLK ORN RED
DFT
R R
CB
CAP
C
W2
BLU/PNK
YEL/PNK
30 60 90 W1
CONT
23
23
C
F
OF2
*ST
+t°
O O
*DTS
YEL/PNK
OF1
YEL/BLU
BRN/YEL
*LPS
OFM
DR
* CH
BLK
H
L2
R
S
*SC
1
*SR
BLK
DR
C
5 2
2
1
OFM
EQUIP GND
COMP
CONT
11
21
*ST
F
YEL
+t°
YEL
SCHEMATIC DIAGRAM (LADDER FORM)
TABLE I - SUPERHEAT CHARGING TABLE
(SUPERHEAT ºF AT LOW-SIDE SERVICE PORT)
EVAPORATOR ENTERING AIR º F WB.
OUTDOOR
TEMP ºF 50 52 54 56 58 60 62 64 67 68 70 72 74 76
55
60
65
70
75
82
85
90
95
100
105
110
115
11 11 12 12 12 13 17 20 24
6 6 7 7 7 7 12 16 21
- - - - - - - - - - 3 7 12 18
- - - - - - - - - - - - - - 7 14
- - - - - - - - - - - - - - 3 11
-- -- -- -- -- -- -- -- *6
-- -- -- -- -- -- -- -- 4
24
22
19
16
13
8
7
-- -- -- -- -- -- -- -- -- 4
25
23
21
20
18
15
14
12
10
8
6
-- -- -- -- -- -- -- -- -- -- -- 5
-- -- -- -- -- -- -- -- -- -- -- 3
25
23
21
18
16
12
11
8
-- -- -- -- -- -- -- -- -- -- 6
-- -- -- -- -- -- -- -- -- -- 4
-- -- -- -- -- -- -- -- -- -- 3
25
23
22
20
18
16
15
14
12
11
9
7
6
25
23
22
20
19
17
16
15
14
12
11
10
8
Where a dash (- -) appears do not attempt to charge system under these
conditions or refrigerant slugging may occur. Charge must be weighed in.
Note: Superheat ºF is at low-side service port, allow a tolerance of +/- 3 ºF
Note: Indoor dry bulb between 70 ºF and 80 ºF
* Optimum performance point, 82 ºF outdoor ambient and (80 ºF dry bulb),
(67 ºF wet bulb) indoor conditions. (DOE B Test Conditions)
TABLE II - REQUIRED SUCTION TUBE TEMPERATURE ºF
(MEASURED AT LOW-SIDE SERVICE PORT)
SUPERHEAT SUCTION PRESSURE AT SERVICE PORT PSIG.
TEMP. ºF 108 112 117 121 126 131 139 141 146
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
43 45
45 47
47 49
49 51
51 53
53 55
55 57
57 59
59 61
61 63
63 65
65 67
67 69
69 71
71 73
73 75
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
Fig. 1 – Wiring Diagram — Model sizes 1--1/2 -- 5 tons, 208/230--1
COOLING ONLY
CHARGING PROCEDURE
1. Operate unit a minimum of 10 minutes
before checking charge.
2. Measure suction pressure by attaching an
accurate gage to suction valve service port.
3. Measure suction temperature by attaching
an accurate thermistor type or electronic
thermometer to the suction line at service
valve.
4. Measure outdoor air dry-bulb temperature
with a thermometer.
5. Measure indoor air (entering indoor coil)
wet-bulb temperature with a sling
psychrometer.
6. Refer to Table I. Find outdoor temperature
and evaporator entering air wet-bulb
temperature. At this intersection, note
superheat. Where a dash (- -) appears on
table do not attempt to charge system
under these conditions or refrigerant
slugging may occur. Charge must be
weighed in, adding or removing 0.6 oz/ft
of 3/8 liquid line above or below 15 ft.
respectively.
7. Refer to Table II. Find superheat
temperature located in step 6 and suction
pressure. At this intersection note suction
line temperature.
8. If unit has a higher suction line temperature
than charted temperature, add refrigerant
until charted temperature is reached.
9. If unit has a lower suction line temperature
than charted temperature, remove and
recover refrigerant until charted
temperature is reached.
10. When adding refrigerant, charge in liquid
form into the suction service port using a
flow-restricting device.
11. If outdoor air temperature or pressure at
suction valve changes, charge to new
suction line temperature indicated on chart.
12. This procedure is valid when indoor air
flow is within +/- 21% of its rated cfm.
336749-101 REV. A
336749-101
REV. A
L2
208/230 3Ø
POWER
SUPPLY
CONNECTION DIAGRAM
BLU
BLU
L1
ALERT!
(NOTE #11)
L3
YEL
BLK
or
RED
PRM
*CH
COMP
EQUIP
GND
OFM
BLK
BLK
YEL
T3
YEL
BLK
OF1
*CHS
YEL/BLU
BRN/YEL
DR
CAP
PRM
CONT 24V COM
C
RVS
O O
DFT
W2
BLU/PNK
DFT
LOGIC
R R
BLU/PNK
DR
Y Y
BLK
OF2
*CH
YEL/BLU
*HPS
*LPS
YEL/PNK
CONT
13
23
OFM
BRN/YEL
L1
L3 L2
CONT 24V COM
T2
T1
CONT
11
21
BRN
BLK or RED
YEL/PNK
L3
L2
L1
CAP
YEL
EQUIP GND
* CHS
L2
PRM
T3
23
13
T2
T1
BLK
21
11
L3
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
COMP
CONT
DR
T1
Y
OF1
T1
BLK
C
OF2
SPEED
UP
O
C Y O W2 R
60
90
120
30
CB
BLK
YEL
WHT
ORN
RED
PNK
R
R
C Y O W2 R E L W3 G
C Y O W2 R E L
-LEGEND-
ORN
G
INDOOR UNIT
TERMINAL BLOCK
INDOOR THERMOSTAT
(NOTE #5)
RVS
ORN
or
BLK
ORN
or
BLK
PNK
BLK
or
PNK
DFT
BLK
or
PNK
NOTE
PRM LED INDICATOR
OFF: NO 24VAC
ON:
OK
FLASH: PHASE PROBLEM
NOTES:
1. Compressor and fan motor furnished with
inherent thermal protection.
2. To be wired in accordance with National
Electric Code (N.E.C.) and local codes.
3. N.E.C. class 2, 24V circuit, min. 40 VA required.
4. Use copper conductors only, from disconnect
to unit.
5. Must use thermostat and sub-base as stated
in pre-sale literature.
6. If indoor section has a transformer with a
grounded secondary, connect the grounded
side to "C" on the circuit board.
7. If any of the original wire, as supplied, must
be replaced, use the same or equivalent wire.
8. Check all electrical connections inside control
box for tightness.
9. Do not attempt to operate unit until service
valves have been opened.
10. It is imperative to connect 3Ø field power
to unit with correct phasing. The Phase
Rotation Monitor will not allow the contactor
to be energized if the phasing is not correct.
If phasing is reversed, simply interchange any two
of the three power connections on the field side.
11. Use conductors suitable for at least 75ºC (167ºF).
C
*HPS
*LPS
90
FIELD SELECTED TIME PERIOD
60
BETWEEN DEFROST CYCLES (MINUTES)
30
SPEED
JUMPERED TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLE
UP
HEAT CYCLE:
90 MIN. ACCELERATED TO 21 SEC.
60 MIN. ACCELERATED TO 14 SEC.
30 MIN. ACCELERATED TO 7 SEC.
DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.
ORN
DFT
HK32EA001
C
BRN/YEL
C
LOGIC
CONT
YEL/BLU
CONDENSING UNIT CHARGING INSTRUCTIONS
For use with units using R-410A refrigerant
TABLE I - SUPERHEAT CHARGING TABLE
(SUPERHEAT ºF AT LOW-SIDE SERVICE PORT)
COOLING ONLY
CHARGING PROCEDURE
EVAPORATOR ENTERING AIR º F WB.
OUTDOOR
TEMP ºF 50 52 54 56 58 60 62 64 67 68 70 72 74 76
1. Operate unit a minimum of 10 minutes
before checking charge.
25 2. Measure suction pressure by attaching an
accurate gage to suction valve service port.
23 3. Measure suction temperature by attaching
22
65
an accurate thermistor type or electronic
20
70
thermometer to the suction line at service valve.
19 4. Measure outdoor air dry-bulb temperature
75
with a thermometer.
82
17
85
16 5. Measure indoor air (entering indoor coil)
wet-bulb temperature with a sling psychrometer.
90
15
6. Refer to Table I. Find outdoor temperature and
14
95
evaporator entering air wet-bulb temperature.
100
12
At this intersection, note superheat. Where a
11
105
dash (- -) appears on table do not attempt to
110
10
charge system under these conditions or
8
115
refrigerant slugging may occur. Charge must
be weighed in, adding or removing 0.6 oz/ft of
Where a dash (- -) appears do not attempt to charge system under these
conditions or refrigerant slugging may occur. Charge must be weighed in.
3/8 liquid line above or below 15 ft. respectively.
Note: Superheat ºF is at low-side service port, allow a tolerance of +/- 3 ºF 7. Refer to Table II. Find superheat temperature
Note: Indoor dry bulb between 70 ºF and 80 ºF
located in step 6 and suction pressure. At this
* Optimum performance point, 82 ºF outdoor ambient and (80 ºF dry bulb),
intersection note suction line temperature.
(67 ºF wet bulb) indoor conditions. (DOE B Test Conditions)
8. If unit has a higher suction line temperature
than charted temperature, add refrigerant
TABLE II - REQUIRED SUCTION TUBE TEMPERATURE ºF
until charted temperature is reached.
(MEASURED AT LOW-SIDE SERVICE PORT)
9.
If
unit has a lower suction line temperature
SUCTION
PRESSURE
AT
SERVICE
PORT
PSIG.
SUPERHEAT
than charted temperature, remove and recover
TEMP. ºF 108 112 117 121 126 131 139 141 146
refrigerant until charted temperature is reached.
CAUTION
0
35 37 39 41 43 45 47 49 51
37 39 41 43 45 47 49 51 53 10. When adding refrigerant, charge in liquid
2
1. Compressor damage may occur if system is
39 41 43 45 47 49 51 53 55
form into the suction service port using a
4
over charged.
6
41 43 45 47 49 51 53 55 57
2. This unit is factory charged with R-410A in
flow-restricting device.
43 45 47 49 51 53 55 57 59 11. If outdoor air temperature or pressure at
accordance with the amount shown on the rating
8
plate. The charge is adequate for most systems 10
45 47 49 51 53 55 57 59 61
suction valve changes, charge to new
using matched coils and tubing not over 15 feet 12
47 49 51 53 55 57 59 61 63
suction line temperature indicated on chart.
long. Check refrigerant charge for maximum
14
49 51 53 55 57 59 61 63 65 12. This procedure is valid when indoor air
efficiency. See Product Data Literature for
16
51 53 55 57 59 61 63 65 67
flow is within +/- 21% of its rated cfm.
required Indoor air Flow Rates and for use of
18
55 57 59 61
65
69
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT
BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAP
CAPACITOR
*CH
CRANKCASE HEATER
*CHS
CRANKCASE HEATER SWITCH
COMP
COMPRESSOR
CONT
CONTACTOR
CB
CIRCUIT BOARD
DFT
DEFROST THERMOSTAT
DR
DEFROST RELAY AND
CIRCUITRY
*HPS
HIGH PRESSURE SWITCH
*LPS
LOW PRESSURE SWITCH
OFM
OUTDOOR FAN MOTOR
line lengths over 15 feet.
PRM
PHASE ROTATION MONITOR
3. Relieve pressure and recover all refrigerant
RVS
before system repair or final disposal. Use all
REVERSING VALVE
service ports and open all flow-control devices,
SOLENOID
including solenoid valves.
4. Never vent refrigerant to atmosphere.
* MAY BE FACTORY OR FIELD INSTALLED.
Use approved recovery equipment.
11 11 12 12 12 13 17 20 24 24
6 6 7 7 7 7 12 16 21 22
- - - - - - - - - - 3 7 12 18 19
- - - - - - - - - - - - - - 7 14 16
- - - - - - - - - - - - - - 3 11 13
-- -- -- -- -- -- -- -- *6 8
-- -- -- -- -- -- -- -- 4 7
-- -- -- -- -- -- -- -- -- 4
55
60
25
23
21
20
18
15
14
12
10
8
6
-- -- -- -- -- -- -- -- -- -- -- 5
-- -- -- -- -- -- -- -- -- -- -- 3
25
23
21
18
16
12
11
8
-- -- -- -- -- -- -- -- -- -- 6
-- -- -- -- -- -- -- -- -- -- 4
-- -- -- -- -- -- -- -- -- -- 3
53
55
57
59
61
63
65
20
22
24
26
28
30
57
59
61
63
65
67
59
61
63
65
67
69
61
63
65
67
69
71
63
65
67
69
71
73
63
65
67
69
71
73
75
67
69
71
73
75
77
25
23
22
20
18
16
15
14
12
11
9
7
6
67
69
71
73
75
77
79
71
73
75
77
79
81
Fig. 2 – Wiring Diagram — Model size 2--1/2 -- 5 tons, 208/230--3
2
336751-101 REV.
A A
336751-101
REV.
L2
460 3Ø
POWER
SUPPLY
CONNECTION DIAGRAM
BLU
BLU
L1
L3
ALERT!
(NOTE #11)
11
21
13
23
OFM
OFR
COMP
T1
YEL
1
3
CONT
11
21
EQUIP
GND
BRN
BLK
YEL
BRN/YEL
OFR
BLK
BRN/YEL
OFM
T2
T3
CONT
13
23
* CHS
BRN/YEL
L1
L3 L2
CONT 24V COM
*CH
L3
L2
L1
L3
CAP
YEL
PRM
L2
PRM
T3
YEL
EQUIP GND
BLK or RED
BLK
* CHS
T1
BLK
BLK
SCHEMATIC DIAGRAM
(LADDER FORM)
L1
COMP
T2
CONT
* CH
YEL/BLU
PRM
CONT 24V COM
CAP
RVS
YEL/BLU
BLK or RED
O O
C
DR
OF1
OF2
OFR
W2
*LPS
YEL/PNK
*HPS
YEL/PNK
BLU/PNK
R R
DFT
BLU/PNK
YEL/BLU
DFT
LOGIC
DR
Y Y
DR
T1
Y
OF1
C
T1
BLK
C
OF2
SPEED
UP
O
60
90
120
30
CB
BLK
YEL
WHT
ORN
RED
C Y O W2 R E L W3 G
C Y O W2 R E L
G
INDOOR UNIT
TERMINAL BLOCK
ORN
or
BLK
ORN
or
BLK
PNK
PNK
R
R
RVS
ORN
BLK
or
PNK
DFT
BLK
or
PNK
FACTORY POWER WIRING
FIELD POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
CONDUCTOR ON CIRCUIT
BOARD
COMPONENT CONNECTION
1/4 - INCH QUICK CONNECT
TERMINALS
FIELD SPLICE
JUNCTION
CAPACITOR
CAP
CRANKCASE HEATER
*CH
CRANKCASE HEATER SWITCH
*CHS
COMPRESSOR
COMP
CONTACTOR
CONT
CIRCUIT BOARD
CB
DEFROST THERMOSTAT
DFT
DEFROST RELAY AND
DR
CIRCUITRY
HIGH PRESSURE SWITCH
*HPS
LOW PRESSURE SWITCH
*LPS
OUTDOOR FAN MOTOR
OFM
OUTDOOR FAN RELAY
OFR
PHASE ROTATION MONITOR
PRM
REVERSING VALVE
RVS
SOLENOID
* MAY BE FACTORY OR FIELD INSTALLED.
NOTE
8. Check all electrical connections inside control box for
tightness.
9. Do not attempt to operate unit until service valves have
been opened.
10. It is imperative to connect 3Ø field power to unit with
correct phasing. The Phase Rotation Monitor will not
allow the contactor to be energized if the phasing is
not correct. If phasing is reversed, simply interchange
any two of the three power connections on the field side.
11. Use conductors suitable for at least 75ºC (167ºF).
CAUTION
1. Compressor damage may occur if system is
over charged.
2. This unit is factory charged with R-410A in
accordance with the amount shown on the rating
plate. The charge is adequate for most systems
using matched coils and tubing not over 15 feet
long. Check refrigerant charge for maximum
efficiency. See Product Data Literature for
required Indoor air Flow Rates and for use of
line lengths over 15 feet.
3. Relieve pressure and recover all refrigerant
before system repair or final disposal. Use all
service ports and open all flow-control devices,
including solenoid valves.
4. Never vent refrigerant to atmosphere.
Use approved recovery equipment.
CONT
CONDENSING UNIT CHARGING INSTRUCTIONS
For use with units using R-410A refrigerant
TABLE I - SUPERHEAT CHARGING TABLE
(SUPERHEAT ºF AT LOW-SIDE SERVICE PORT)
PRM LED INDICATOR
EVAPORATOR ENTERING AIR º F WB.
OFF: NO 24VAC
OUTDOOR
ON:
OK
TEMP ºF 50 52 54 56 58 60 62 64 67 68 70 72 74 76
FLASH: PHASE PROBLEM
NOTES:
55
11
12 12 12 13 17 20 24 24 25 25 25 25
11
1. Compressor and fan motor furnished with inherent
6 6 7 7 7 7 12 16 21 22 23 23 23 23
60
thermal protection.
65
- - - - - - - - - - 3 7 12 18 19 21 21 22 22
2. To be wired in accordance with National Electric Code
(N.E.C.) and local codes.
- - - - - - - - - - - - - - 7 14 16 18 20 20 20
70
3. N.E.C. class 2, 24V circuit, min. 40 VA required.
- - - - - - - - - - - - - - 3 11 13 16 18 18 19
75
4. Use copper conductors only, from disconnect to unit.
- - - - - - - - - - - - - - - - * 6 8 12 15 16 17
82
5. Must use thermostat and sub-base as stated in pre-sale
- - - - - - - - - - - - - - - - 4 7 11 14 15 16
85
literature.
- - - - - - - - - - - - - - - - - - 4 8 12 14 15
90
6. If indoor section has a transformer with a grounded
- - - - - - - - - - - - - - - - - - - - 6 10 12 14
95
secondary, connect the grounded side to "C" on the
100 - - - - - - - - - - - - - - - - - - - - 4 8 11 12
circuit board.
105 - - - - - - - - - - - - - - - - - - - - 3 6 9 11
7. If any of the original wire, as supplied, must be replaced,
110 - - - - - - - - - - - - - - - - - - - - - - 5 7 10
use the same or equivalent wire.
115 - - - - - - - - - - - - - - - - - - - - - - 3 6 8
INDOOR THERMOSTAT
(NOTE #5)
-LEGEND-
*HPS
*LPS
90
FIELD SELECTED TIME PERIOD
60
BETWEEN DEFROST CYCLES (MINUTES)
30
SPEED
JUMPERED
TEST PINS (USE METAL OBJECT), FIELD SPEED-UP CYCLE
UP
HEAT CYCLE:
90 MIN. ACCELERATED TO 21 SEC.
60 MIN. ACCELERATED TO 14 SEC.
30 MIN. ACCELERATED TO 7 SEC.
DEFROST CYCLE: 10 MIN. ACCELERATED TO 2 SEC.
ORN
DFT
HK32EA001
C
BRN/YEL
C
LOGIC
C Y O W2 R
YEL/BLU
COOLING ONLY
CHARGING PROCEDURE
1. Operate unit a minimum of 10 minutes
before checking charge.
2. Measure suction pressure by attaching an
accurate gage to suction valve service port.
3. Measure suction temperature by attaching
an accurate thermistor type or electronic
thermometer to the suction line at service valve.
4. Measure outdoor air dry-bulb temperature
with a thermometer.
5. Measure indoor air (entering indoor coil)
wet-bulb temperature with a sling psychrometer.
6. Refer to Table I. Find outdoor temperature and
evaporator entering air wet-bulb temperature.
At this intersection, note superheat. Where a
dash (- -) appears on table do not attempt to
charge system under these conditions or
refrigerant slugging may occur. Charge must
be weighed in, adding or removing 0.6 oz/ft of
Where a dash (- -) appears do not attempt to charge system under these
conditions or refrigerant slugging may occur. Charge must be weighed in.
3/8 liquid line above or below 15 ft. respectively.
Note: Superheat ºF is at low-side service port, allow a tolerance of +/- 3 ºF 7. Refer to Table II. Find superheat temperature
Note: Indoor dry bulb between 70 ºF and 80 ºF
located in step 6 and suction pressure. At this
* Optimum performance point, 82 ºF outdoor ambient and (80 ºF dry bulb),
intersection note suction line temperature.
(67 ºF wet bulb) indoor conditions. (DOE B Test Conditions)
8. If unit has a higher suction line temperature
than charted temperature, add refrigerant
TABLE II - REQUIRED SUCTION TUBE TEMPERATURE ºF
until charted temperature is reached.
(MEASURED AT LOW-SIDE SERVICE PORT)
9.
If
unit has a lower suction line temperature
SUCTION
PRESSURE
AT
SERVICE
PORT
PSIG.
SUPERHEAT
than charted temperature, remove and recover
TEMP. ºF 108 112 117 121 126 131 139 141 146
refrigerant until charted temperature is reached.
0
35 37 39 41 43 45 47 49 51
37 39 41 43 45 47 49 51 53 10. When adding refrigerant, charge in liquid
2
39 41 43 45 47 49 51 53 55
form into the suction service port using a
4
6
41 43 45 47 49 51 53 55 57
flow-restricting device.
43 45 47 49 51 53 55 57 59 11. If outdoor air temperature or pressure at
8
10
45 47 49 51 53 55 57 59 61
suction valve changes, charge to new
12
47 49 51 53 55 57 59 61 63
suction line temperature indicated on chart.
14
49 51 53 55 57 59 61 63 65 12. This procedure is valid when indoor air
16
51 53 55 57 59 61 63 65 67
flow is within +/- 21% of its rated cfm.
18
55 57 59 61
65
69
20
22
24
26
28
30
53
55
57
59
61
63
65
57
59
61
63
65
67
59
61
63
65
67
69
61
63
65
67
69
71
63
65
67
69
71
73
63
65
67
69
71
73
75
67
69
71
73
75
77
67
69
71
73
75
77
79
Fig. 3 – Wiring Diagram — Model size 3, 4, and 5 tons, 460/3
3
71
73
75
77
79
81
336752-101 REV.
A A
336752-101
REV.
EBryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 02/10
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
4
Catalog No. WD213B---01
Replaces: New