Operating limits, Operating parameters, Single speed models – WaterFurnace Envision2 User Manual
Page 43: Envision, Compact installation manual
43
ENVISION
2
COMPACT INSTALLATION MANUAL
Operating Limits
Operating Limits
Cooling
Heating
(°F)
(°C)
(°F)
(°C)
Air Limits
Min. Ambient Air
45
7.2
45
7.2
Rated Ambient Air
80
26.7
70
21.1
Max. Ambient Air
100
37.8
85
29.4
Min. Entering Air
50
10.0
40
4.4
Rated Entering Air db/wb
80.6/66.2
27/19
68
20.0
Max. Entering Air db/wb
110/83
43/28.3
80
26.7
Water Limits
Min. Entering Water
30
-1.1
20
-6.7
Normal Entering Water
50-110
10-43.3
30-70
-1.1
Max. Entering Water
120
48.9
90
32.2
NOTE: Minimum/maximum limits are only for start-up conditions, and
are meant for bringing the space up to occupancy temperature. Units
are not designed to operate at the minimum/maximum conditions on
a regular basis. The operating limits are dependant upon three primary
factors: 1) water temperature, 2) return air temperature, and 3) ambient
temperature. When any of the factors are at the minimum or maximum
levels, the other two factors must be at the normal level for proper and
reliable unit operation.
Operating Parameters
Single Speed Models
Entering Water
Temp °F
Water Flow
gpm/ton
Cooling -- No Hot Water Generation
Suction Pressure
psig
Discharge Pres-
sure psig
Superheat
Subcooling
Water Temp Rise
°F
Air Temp Drop
°F DB
30
1.5
115 - 125
150 - 170
20 - 35
10 - 17
17 - 22
17 - 23
3.0
105 - 120
130 - 145
20 - 35
10 - 17
8 - 10
17 - 23
50
1.5
130 - 140
215 - 235
12 - 20
8 - 14
16 - 22
17 - 23
3.0
128 - 138
190 - 210
12 - 20
8 - 14
8 - 12
17 - 23
70
1.5
138 - 148
280 - 310
10 - 16
10 - 16
15 - 21
17 - 23
3.0
136 - 146
250 - 280
10 - 16
8 - 14
7 - 13
17 - 23
90
1.5
145 - 155
350 - 380
9 - 14
10 - 16
14 - 20
17 - 23
3.0
143 - 153
320 - 350
9 - 14
8 - 14
6 - 10
17 - 23
110
1.5
145 - 155
420 - 450
9 - 14
10 - 16
14 - 20
17 - 23
3.0
143 - 153
405 - 435
9 - 14
8 - 14
6 - 10
17 - 23
Entering Water
Temp °F
Water Flow
gpm/ton
Heating - No Hot Water Generation
Suction Pressure
psig
Discharge Pres-
sure psig
Superheat
Subcooling
Water Temp Drop
°F
Air Temp Rise
°F DB
30
1.5
73 - 85
270 - 305
8 - 14
3 - 10
6 - 10
15 - 21
3.0
77 - 90
280 - 315
8 - 14
3 - 10
4 - 8
17 - 23
50
1.5
97 - 110
290 - 325
10 - 16
3 - 10
9 - 13
22 - 28
3.0
102 - 115
300 - 335
10 - 16
3 - 10
7 - 11
24 - 30
70
1.5
130 - 145
320 - 355
13 - 19
3 - 10
10 - 14
30 - 36
3.0
135 - 150
325 - 360
13 - 19
3 - 10
8 - 12
32 - 38
90
1.5
150 - 160
350 - 390
13 - 19
3 - 10
10 - 14
30 - 36
3.0
155 - 165
365 - 405
13 - 19
3 - 10
8 - 12
32 - 38
110
1.5
3.0
NOTE: Cooling performance based on entering air temperatures of 80º F DB, 67º F WB.
Heating performance based on entering air temperature of 70º F DB.
2/15/12