Johnson Controls PREMIUM EFFICIENCY VPCS Series, Инструкция по установке, эксплуатации и обслуживанию

Страница: 42 / 56

42
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
SECTION 2 - OPERATION
TABLE 8 - ECM BLOWER PERFORMANCE (CONT'D)
UNIT SIZE
MOT
OR
SPEED
EXTERNAL
ST
ATIC
OPTION
ECM T
AP#
RA
TED
COOLING
(CFM)
RA
TED
HEA
TING
(CFM)
EXTERNAL STATIC PRESSURE (IWG)
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6
30
OPTIONAL
FAN ONLY
N/A 1
1075 1075
870 850 830 810 790 770 750 725 700 680 660 - -
LOW
LOW
2 940 920 900 885 870 855 840 820 800 775 750 - -
HIGH 3 1160 1125 1090 1075 1060 1050 1040 1035 1010 995 980 960 930
LOW
HIGH
4 1070 1055 1040 1020 1000 980 960 940 920 900 880 860 840
HIGH 5 1330 1315 1300 1285 1270 1250 1230 1205 1160 1130 1080 1070 1060
36
OPTIONAL
FAN ONLY
N/A 1
1100 1250
870 850 830 810 790 770 750 725 700 680 660 - -
LOW
LOW
2 1070 1055 1040 1020 1000 980 960 940 920 900 880 - -
HIGH 3 1200 1185 1170 1155 1140 1120 1100 1085 1070 1055 1040 995 950
LOW
HIGH
4 1160 1125 1090 1075 1060 1050 1040 1035 1010 995 980 960 930
HIGH 5 1460 1430 1400 1370 1340 1295 1250 1210 1175 1145 1090 1080 1070
NOTES
All airflow ratings are at the lowest voltage rating of dual rating (for example, 208 volt).
Airflow ratings include the resistance of wet coil and clean air filters.
UNIT CONTROLS
The control system microprocessor board is specifi-
cally designed for water source heat pump operation.
The control system interfaces with a conventional type
thermostat.
• The unit is complete with a self-contained low-
voltage control circuit.
• The unit incorporates a lockout circuit that pro-
vides reset capability from a hard lockout at the
space thermostat or base unit if any of the follow-
ing standard safety devices trip and shut off the
compressor:
• Low pressure limit switch (loss of charge)
• High pressure limit switch
• Freeze protection switch (unit shutdown on
low water temperature)
• Condensate overflow switch
• The unit operates with conventional thermostat
designs and has a low voltage terminal strip for
easy hook-up.
• Unit control board has on-board diagnostics and
fault code display.
• Standard controls include anti-short cycle and low
voltage protection.
• The control board monitors each refrigerant safe-
ty switch independently.
• The control board has a random start feature.
•
The control board retains the last five fault codes
in nonvolatile memory that cannot be lost in the
event of a power loss.
Sequence of Operation
The room thermostat makes a circuit between R and Y
for cooling.
The call passes to the unit microprocessor control that
determines whether the requested operation is avail-
able and if so, which components to energize.
For heating, the room thermostat makes a circuit be-
tween R and W. The microprocessor control energizes
the compressor and fan, enabling the unit to run in
heating mode.