Operate Ecm Interface Board - Carrier Aquazone 50PTH036 Installation, Start-Up And Service Instructions Manual
Two-stage water source heat pumps
with puron refrigerant
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Operate ECM Interface Board —
viding a connecting point for thermostat wiring, the interface
board also translates thermostat inputs into control commands
for the Electronic Commutated Motor (ECM) DC fan motor
and provides thermostat signlas to unit's Complete C board.
The thermostat connections and their functions are shown in
Fig. 21.
IMPORTANT: CFM LED is an approximation. Utilize
conventional Test and Balance equipment for accurate
airflow measurement.
The CFM count indicator (See Fig. 21, item 6) blinks to indi-
cate approximate airflow in CFM and may flicker when unit is
off. Each blink of the LED represent approximately 100 CFM
10
R
R
C1
C2
EM
W2
W1
W1
O
Y2
O
Y1
Y2
G
H
Y1
C
G
R
9
8
7
6
50PTH,
RATED
FAN
PTV
AIRFLOW
SPEED
UNITS
(Cfm)
5
950
4
825
024
3
725
2
650
1
500
5
1300
4
1100
036
3
950
2
800
1
750
5
1800
4
1600
048
3
1400
2
1300
1
1100
5
2200
4
2000
060
3
1800
2
1600
1
1400
5
2500
4
2350
070
3
2100
2
1850
1
1600
LEGEND
—
— Operation Not Recommended
FL
— Full Load
PL
— Part Load
In addition to pro-
1
CFM
CFM
NORM
A
B
[+]
C
[-]
D
TEST
H
YES
HGRH
C G O Y1 Y2 W1 W2 H
C
2
5
4
Fig. 21 — ECM Interface Board Physical Layout
Table 7 — Constant Torque Motor Blower Performance Data
FACTORY
SETTING
0.10
0.20
1,154
1,117
FL
1,072
1,018
976
920
906
844
PL/Fan Only
829
750
1,506
1,469
FL
1,425
1,326
1,354
1,233
1,294
1,157
PL/Fan Only
1,213
1,084
1,950
1,912
FL
1,774
1,738
1,565
1,526
1,506
1,469
PL/Fan Only
1,425
1,326
2,476
2,403
FL
2,170
2,135
1,942
1,914
1,766
1,729
PL/Fan Only
1,561
1,520
2,723
2,671
FL
2,566
2,529
2,256
2,230
2,004
1,975
PL/Fan Only
1,766
1,728
of air delivery so if the LED blinks 12 times, pauses, blinks 12
times, etc. the blower is delivering approximately 1200 CFM.
THERMOSTAT OUTPUTS
Y1 First Stage Compressor Operation
Y2 Second Stage Compressor Operation
G Fan
O Reversing Valve (energized in cooling)
W1 Auxiliary Electric Heat (runs with compressor)
EM/W2 Emergency Heat (electric heat only)
NC Transformer 24 VAC Common (extra connection)
C1 Transformer 24 VAC Common (primary connection)
R Transformer 24 VAC Hot
H Dehumidification Mode
3
J01
1
Motor harness plug
2
Blower CFM adjustment
3
Motor settings
ADJUST
4
Dehumidification indication
5
Thermostat digital contact inputs
6
CFM count indicator
HGRH
7
Thermostat input status indication
8
Reheat digital outputs
NO
9
Thermostat outputs
10
24 VAC
11
Dehumidification method selector
11
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.30
0.40
0.50
0.60
1,077
1,034
988
938
966
915
866
818
867
815
766
719
785
730
678
630
676
610
551
498
1,430
1,390
1,347
1,300
1,250
1,191
1,143
1,100
1,138
1,063
1,002
950
1,041
946
866
800
976
886
812
750
1,880
1,852
1,826
1,800
1,703
1,669
1,635
1,600
1,493
1,463
1,432
1,400
1,430
1,390
1,347
1,300
1,250
1,191
1,143
1,100
2,338
2,283
2,237
2,200
2,100
2,066
2,033
2,000
1,886
1,858
1,829
1,800
1,693
1,660
1,629
1,600
1,483
1,451
1,423
1,400
2,622
2,578
2,537
2,500
2,489
2,446
2,399
2,350
2,202
2,171
2,137
2,100
1,945
1,915
1,883
1,850
1,693
1,660
1,629
1,600
23
0.70
0.80
0.90
1.00
886
830
—
—
—
—
772
727
—
—
674
631
—
—
585
544
—
—
451
412
1,249
1,193
1,130
1,061
1,056
1,006
942
860
901
850
791
719
744
696
653
611
698
653
612
573
1,771
1,737
1,695
1,644
1,562
1,521
1,475
1,423
1,363
1,319
1,265
1,199
1,249
1,193
1,130
1,061
1,056
1,006
942
860
2,172
2,153
2,142
2,141
1,968
1,937
1,907
1,877
1,770
1,741
1,710
1,680
1,573
1,548
1,526
1,505
1,381
1,366
1,356
1,350
2,467
2,437
2,412
2,390
2,298
2,242
2,184
2,122
2,060
2,017
1,971
1,922
1,816
1,781
1,745
1,708
1,573
1,548
1,526
1,505
1.10
1.20
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2,149
2,166
1,848
1,819
1,649
1,617
1,487
1,470
1,349
1,352
2,372
2,358
2,057
1,990
1,871
1,816
1,669
1,630
1,486
1,470
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