38
Fig. 74 — Enthalpy Changeover Set Points
INDOOR AIR QUALITY (IAQ) SENSOR INPUT
The IAQ input can be used for demand control ventilation con-
trol based on the level of CO
2
measured in the space or return
air duct.
Mount the accessory IAQ sensor according to manufacturer
specifications. The IAQ sensor should be wired to the AQ and
AQ1 terminals of the controller. Adjust the DCV potentiome-
ters to correspond to the DCV voltage output of the indoor air
quality sensor at the user-determined set point. See Fig. 75.
Fig. 75 — CO
2
Sensor Maximum Range Settings
If a separate field-supplied transformer is used to power the
IAQ sensor, the sensor must not be grounded or the
EconoMi$er IV control board will be damaged.
When using demand ventilation, the minimum damper position
represents the minimum ventilation position for VOC (volatile or-
ganic compounds) ventilation requirements. The maximum de-
mand ventilation position is used for fully occupied ventilation.
When demand ventilation control is not being used, the mini-
mum position potentiometer should be used to set the occupied
ventilation position. The maximum demand ventilation posi-
tion should be turned fully clockwise.
EXHAUST SET POINT ADJUSTMENT
The exhaust set point will determine when the exhaust fan runs
based on damper position (if accessory power exhaust is in-
stalled). The set point is modified with the Exhaust Fan set
point (EXH SET) potentiometer. See Fig. 69. The set point rep-
resents the damper position above which the exhaust fans will
be turned on. When there is a call for exhaust, the EconoMi$er
IV controller provides a 45 ± 15 second delay before exhaust
fan activation to allow the dampers to open. This delay allows
the damper to reach the appropriate position to avoid unneces-
sary fan overload.
MINIMUM POSITION CONTROL
There is a minimum damper position potentiometer on the
EconoMi$er IV controller. See Fig. 69. The minimum damper
position maintains the minimum airflow into the building
during the occupied period.
When using demand ventilation, the minimum damper position
represents the minimum ventilation position for Volatile Or-
ganic Compound (VOC) ventilation requirements. The maxi-
mum demand ventilation position is used for fully occupied
ventilation.
When demand ventilation control is not being used, the mini-
mum position potentiometer should be used to set the occupied
ventilation position. The maximum demand ventilation posi-
tion should be turned fully clockwise.
Adjust the minimum position potentiometer to allow the mini-
mum amount of outdoor air, as required by local codes, to enter
the building. Make minimum position adjustments with at least
10°F temperature difference between the outdoor and return-
air temperatures.
To determine the minimum position setting, perform the fol-
lowing procedure:
1. Calculate the appropriate mixed air temperature using the
following formula:
T
O
= Outdoor-Air Temperature
OA = Percent of Outdoor Air
T
R
= Return-Air Temperature
RA = Percent of Return Air
T
M
= Mixed-Air Temperature
As an example, if local codes require 10% outdoor air during
occupied conditions, outdoor-air temperature is 60°F, and re-
turn-air temperature is 75°F.
(60 x 0.10) + (75 x 0.90) = 73.5°F
2. Disconnect the supply air sensor from terminals T and T1.
3. Ensure that the factory-installed jumper is in place across
terminals P and P1. If remote damper positioning is being
used, make sure that the terminals are wired according to
Fig. 69 and that the minimum position potentiometer is
turned fully clockwise.
4. Connect 24 vac across terminals TR and TR1.
5. Carefully adjust the minimum position potentiometer until
the measured mixed air temperature matches the calcu-
lated value.
6. Reconnect the supply air sensor to terminals T and T1.
Remote control of the EconoMi$er IV damper is desirable
when requiring additional temporary ventilation. If a field-sup-
plied remote potentiometer (Honeywell P/N: S963B1128) is
wired to the EconoMi$er IV controller, the minimum position
of the damper can be controlled from a remote location.
To control the minimum damper position remotely, remove the
factory-installed jumper on the P and P1 terminals on the
EconoMi$er IV controller. Wire the field-supplied potentiometer
CONTROL
CURVE
A
B
C
D
CONTROL POINT
APPROX.
deg. F (deg. C)
AT 50
%
RH
73 (23)
70 (21)
67 (19)
63 (17)
12
14
16
1
8
20
2
2
2
4
2
6
28
30
32
3
4
3
6
38
40
42
4
4
46
9
0
1
0
0
80
7
0
60
50
40
30
20
10
E
NTHALPY
BTU PER
POUN
D DRY
AI
R
85
(29)
90
(32)
95
(35)
100
(38)
105
(41)
110
(43)
3
5
(2)
35
(2)
40
(4)
40
(4)
105
(41)
110
(43)
45
(7)
45
(7)
50
(10)
50
(10)
55
(13)
55
(13)
60
(16)
60
(16)
65
(18)
65
(18)
70
(21)
70
(21)
75
(24)
75
(24)
80
(27)
80
(27)
85
(29)
90
(32)
95
(35)
100
(38)
A
A
B
B
C
C
D
D
RELA
TI
VE HUMI
DI
TY (
%
)
HIGH LIMIT
CURVE
APPROXIMATE DRY BULB TEMPERATURE--degree
s
F (degree
s
C)
0
1000
2000
3
000
4000
5000
6000
2
3
4
5
6
7
8
RANGE
C
ONFIGURA
TION
(ppm)
DAMPER VOLTAGE FOR MAX VENTILATION RATE
CO
S
EN
S
OR MAX RANGE
S
ETTING
2
8
00 ppm
900 ppm
1000 ppm
1100 ppm
(T
O
OA
) + (T
R
x
RA
) = T
M
100
100
x
Содержание WeatherMaster 50HC04
Страница 32: ...32 Fig 63 RTU Open Overlay for Economizer Wiring ...
Страница 33: ...33 Fig 64 VFD Overlay for W2770 Controller Wiring ...
Страница 85: ...85 Fig B 50HC A04 A06 PAC Control Diagram 208 1 60 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 86: ...86 Fig C 50HC A07 PAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 89: ...89 Fig F 50HC D08 D09 PAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 90: ...90 Fig G 50HC D11 PAC Control Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 91: ...91 Fig H 50HC D12 PAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 92: ...92 Fig I 50HC D14 PAC Control Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 93: ...93 Fig J 50HC A04 A06 PAC Power Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Страница 94: ...94 Fig K 50HC A04 A06 PAC Power Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 95: ...95 Fig L 50HC A07 PAC Power Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 98: ...98 Fig O 50HC D07 PAC Power Diagram 575 3 60 6 Ton 2 Stage with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 99: ...99 Fig P 50HC D08 D09 PAC Power Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 100: ...100 Fig Q 50HC D11 PAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 101: ...101 Fig R 50HC D11 PAC Power Diagram 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 102: ...102 Fig S 50HC D12 PAC Power Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 103: ...103 Fig T 50HC D14 PAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 104: ...104 Fig U 50HC D14 PAC Power Diagram 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 109: ...109 Fig Z 50HC D12 PAC Control Diagram 230 460 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 110: ...110 Fig AA 50HC D14 PAC Control Diagram 230 460 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 111: ...111 Fig AB 50HC A04 A06 PAC Power Diagram 208 230 1 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 112: ...112 Fig AC 50HC A04 A06 PAC Power Diagram 208 230 460 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 113: ...113 Fig AD 50HC A04 A06 PAC Power Diagram 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 114: ...114 Fig AE 50HC A07 PAC Power Diagram 208 230 460 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 115: ...115 Fig AF 50HC A07 PAC Power Diagram 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 116: ...116 Fig AG 50HC D08 D09 PAC Power Diagram 208 230 460 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 117: ...117 Fig AH 50HC D08 D09 PAC Power Diagram 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 118: ...118 Fig AI 50HC D11 PAC Power Diagram 208 230 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 119: ...119 Fig AJ 50HC D11 PAC Power Diagram 460 3 60 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 121: ...121 Fig AL 50HC D14 PAC Power Diagram 208 230 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 122: ...122 Fig AM 50HC D14 PAC Power Diagram 460 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 123: ...123 Fig AN 50HC D14 PAC Power Diagram 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS ...
Страница 124: ...124 Fig AO PremierLink System A04 A06 Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Страница 125: ...125 Fig AP RTU Open System Control A04 A06 Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Страница 126: ...126 Fig AQ PremierLink System A07 D14 Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Страница 127: ...127 Fig AR RTU Open A07 D14 Wiring Diagram APPENDIX D WIRING DIAGRAMS ...