Board 41

Submit Your Diagnosis
Coil open
Compressor inefficient
Compressor tight (drag/seizing)
Condenser fouled or dirty
Contact burned off
Contact stuck closed
EFM seized
Evaporator airflow low
Fuse open
HPC open
low condensing ambient
low voltage
LPC open or set incorrectly
Mixed refrigerants
No faults
No power
No refrigerant
Non-condensables
Refrigerant overcharge
Refrigerant undercharge
restriction (High Side)
T-Stat open
TXV bulb charge lost
TXV bulb loose
water insufficient
water too warm
windings grounded
windings or overload open
wiring open
WRV faulty (or set incorrectly)

Symptoms Key
SUC	Low Side Pressure
COR	Corresponding Temperature
SLT	Suction Line Temperature
SH	Superheat
HEAD	Head Pressure
COR	Corresponding Temperature
LLT	Liquid Line Temperature
SC	Subcooling
EEA	Entering Evaporator Air Temperature
LEA	Leaving Evaporator Air Temperature
ΔT	Delta T: change in temperature (ΔT air)
ECW	Entering Condenser Water Temperature
LCW	Leaving Condenser Water Temperature
ΔT	Delta T: change in temperature (ΔT Water)
AMP	Amperage Draw (compressor, actual amps)
DLT	Discharge Line Temperature

Schematic and Piping Diagrams Key
C	Common
COMPR	Compressor
CR	Current Relay
EFM	Evaporator Fan Motor
F1	Fuse 1
G	Ground
HPC	High Pressure control
IN	Water In
INT OL	Internal Overload
L1	Line 1
LPC	Low Pressure Control
N	Neutral
OUT	Water Out
PR	Potential Relay
R	Run
RC	Run Cap
S1	Switch 1
S	Start
SC	Start Cap
T-STAT	Thermostat
VAC	Volts Alternating Current
WRV	Water Regulator Valve

HFO-1234ze

R-1234ze

Temp    Pressure
 °F      psig
-153	-14.7
-152	-14.7
-151	-14.7
-150	-14.6
-149	-14.6
-148	-14.6
-147	-14.6
-146	-14.6
-145	-14.6
-144	-14.6
-143	-14.6
-142	-14.6
-141	-14.6
-140	-14.6
-139	-14.6
-138	-14.6
-137	-14.6
-136	-14.6
-135	-14.6
-134	-14.6
-133	-14.6
-132	-14.6
-131	-14.6
-130	-14.5
-129	-14.5
-128	-14.5
-127	-14.5
-126	-14.5
-125	-14.5
-124	-14.5
-123	-14.5
-122	-14.5
-121	-14.5
-120	-14.4
-119	-14.4
-118	-14.4
-117	-14.4
-116	-14.4
-115	-14.4
-114	-14.4
-113	-14.3
-112	-14.3
-111	-14.3
-110	-14.3
-109	-14.3
-108	-14.3
-107	-14.2
-106	-14.2
-105	-14.2
-104	-14.2
-103	-14.2
-102	-14.1
-101	-14.1
-100	-14.1
-99	-14.0
-98	-14.0
-97	-14.0
-96	-14.0
-95	-13.9
-94	-13.9
-93	-13.9
-92	-13.8
-91	-13.8
-90	-13.8
-89	-13.7
-88	-13.7
-87	-13.6
-86	-13.6
-85	-13.5
-84	-13.5
-83	-13.5
-82	-13.4
-81	-13.4
-80	-13.3
-79	-13.2
-78	-13.2
-77	-13.1
-76	-13.1
-75	-13.0
-74	-13.0
-73	-12.9
-72	-12.8
-71	-12.8
-70	-12.7
-69	-12.6
-68	-12.5
-67	-12.5
-66	-12.4
-65	-12.3
-64	-12.2
-63	-12.1
-62	-12.0
-61	-12.0
-60	-11.9
-59	-11.8
-58	-11.7
-57	-11.6
-56	-11.5
-55	-11.3
-54	-11.2
-53	-11.1
-52	-11.0
-51	-10.9
-50	-10.8
-49	-10.6
-48	-10.5
-47	-10.4
-46	-10.2
-45	-10.1
-44	-10.0
-43	-9.8
-42	-9.7
-41	-9.5
-40	-9.4
-39	-9.2
-38	-9.0
-37	-8.9
-36	-8.7
-35	-8.5
-34	-8.3
-33	-8.2
-32	-8.0
-31	-7.8
-30	-7.6
-29	-7.4
-28	-7.2
-27	-7.0
-26	-6.7
-25	-6.5
-24	-6.3
-23	-6.1
-22	-5.8
-21	-5.6
-20	-5.3
-19	-5.1
-18	-4.8
-17	-4.6
-16	-4.3
-15	-4.0
-14	-3.8
-13	-3.5
-12	-3.2
-11	-2.9
-10	-2.6
-9	-2.3
-8	-2.0
-7	-1.6
-6	-1.3
-5	-1.0
-4	-0.6
-3	-0.3
-2	0.1
-1	0.4
0	0.8
1	1.2
2	1.5
3	1.9
4	2.3
5	2.7
6	3.1
7	3.5
8	4.0
9	4.4
10	4.8
11	5.3
12	5.8
13	6.2
14	6.7
15	7.2
16	7.7
17	8.2
18	8.7
19	9.2
20	9.7
21	10.2
22	10.8
23	11.3
24	11.9
25	12.5
26	13.0
27	13.6
28	14.2
29	14.8
30	15.4
31	16.1
32	16.7
33	17.4
34	18.0
35	18.7
36	19.4
37	20.1
38	20.8
39	21.5
40	22.2
41	22.9
42	23.7
43	24.4
44	25.2
45	26.0
46	26.8
47	27.6
48	28.4
49	29.2
50	30.0
51	31
52	32
53	33
54	34
55	34
56	35
57	36
58	37
59	38
60	39
61	40
62	41
63	42
64	43
65	44
66	45
67	46
68	47
69	48
70	50
71	51
72	52
73	53
74	54
75	55
76	56
77	58
78	59
79	60
80	61
81	63
82	64
83	65
84	67
85	68
86	69
87	71
88	72
89	73
90	75
91	76
92	78
93	79
94	81
95	82
96	84
97	85
98	87
99	88
100	90
101	92
102	93
103	95
104	97
105	98
106	100
107	102
108	103
109	105
110	107
111	109
112	111
113	112
114	114
115	116
116	118
117	120
118	122
119	124
120	126
121	128
122	130
123	132
124	134
125	136
126	138
127	140
128	143
129	145
130	147
131	149
132	152
133	154
134	156
135	158
136	161
137	163
138	166
139	168
140	171
141	173
142	175
143	178
144	181
145	183
146	186
147	188
148	191
149	194
150	196
151	199
152	202
153	205
154	207
155	210
156	213
157	216
158	219
159	222
160	225
161	228
162	231
163	234
164	237
165	240
166	243
167	247
168	250
169	253
170	256
171	260
172	263
173	266
174	270
175	273
176	277
177	280
178	284
179	287
180	291
181	294
182	298
183	302
184	305
185	309
186	313
187	317
188	321
189	324
190	328
191	332
192	336
193	340
194	344
195	349
196	353
197	357
198	361
199	365
200	370
201	374
202	378
203	383
204	387
205	392
206	396
207	401
208	405
209	410
210	415
211	419
212	424
213	429
214	434
215	439
216	444
217	449
218	454
219	459
220	464
221	469
222	475
223	480
224	485

Trade Name	Solstice ze
Formula	C₃H₂F₄
Chemical Name	trans-1,3,3,3-tetrafluoroprop-1-ene
Application	chillers, heat pumps, refrigerators, vending machines, beverage dispensers supermarket refrigeration systems, new equipment only
Type	HFO
Oil	POE
Replaces	R-134A
AHRI colour assignment
ODP	0
GWP	< 1
Phase Down Date	none
ASHRAE Classification

Old Refrigerants

HFO-1234ze