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ENVISION SERIES AIR HANDLER INSTALLATION MANUAL
Electrical Data
Thermistor
Lightemittingdiode- Green
Relay coil
Capacitor w/bleed resistor
Switch - Condensate overflow
Switch - High pressure
Switch - Low pressure
Switch -Hot Water On/Off
Polarized connector
Factory Low voltage wiring
Factory Line voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
DC Voltage PCB traces
Internal junction
Quick connectterminal
Wire nut
Fieldwirelug
Ground
Fuse
HE -
LP -
PB -
SW1 -
Heater element
Lowpressure switch
Power block
DIP package10position
Legend
Relay Contacts-
N.O., N.C.
G
T
L1
ER1 to ER4 - Aux heat stage relays
1 2 3
P
Thermostat
R
C
Y1
O
W
Y2
Transformer
G
ECM2
Fan Motor
Grn
On/Off
BK
RPM
C2
RPM grnd
2 3 4 51
Blk/Wh
Yel
24V
C1
EM / W2
ADJUST
DELAY
COOL
Y/Y2
R
Y1
O
W/W1
HEAT
208-230/60/1
L2L1
PB
Orange
Brown
P4
XFRM
SEC
C
11
12
16
8
1
7
6
13
9
10
15
3
5
4
2
14
R
Y1
Y2
On
SW1
1
2
3
4
5
6
7
8
9
10
O/B
G
W1
ODD
W2
C
R
LED
W1
W2
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Blue
Red
NOTE 1
11
12
16
8
1
7
10
3
5
4
6
13
9
15
2
14
G
Grn/Yel(1)
Notes:
1 – To operate in 208V mode replace theblue transformer
wire connected to PB-L2 with red transformer wire.
2 – Jumper wires tie stages (1) with (2) and (3)with (4).
Note 3
3–Dipswitchesareusedtoselecttheairflow.
P3
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13
Thermostat
R
C
Y1
O
W
Y2
Transformer
G
Grn
2 3 4 51
Blk/Wh
Yel
24V
208-230/60/1
L2L1
PB
Orange
Brown
TDR
Wht(10) Blu(11)
Grn(9)
P2
P1
123456
Gray
ER4
NO
Wht(8)
Grn(9)
P4
XFRM
SEC
C
R
Y1
Y2
On
SW1
1
2
3
4
5
6
7
8
9
10
O/B
G
W1
ODD
W2
C
R
LED
W1
W2
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
NOTE 2
Black
Blue
Red
NOTE 1
ER3
NO
ER2
NO
ER1
NO
Gry(4)
Yel(5)
Gry(6)
Yel(7)
G
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Grn/Yel(1)
Electric Heat
HE1
TS1
Gry(12)
HE3
TS3
Yel(16)
Note 3
P3
ECM2
Fan Motor
On/Off
BK
RPM
C2
RPM grnd
C1
EM / W2
ADJUST
DELAY
COOL
Y/Y2
R
Y1
O
W/W1
HEAT
11
12
16
8
1
7
10
3
5
4
6
13
9
15
2
14
11
12
16
8
1
7
6
13
9
10
15
3
5
4
2
14
Thermostat
R
C
Y1
O
W
Y2
Transformer
G
Grn
2 3 4 51
Blk/Wh
Yel
24V
208-230/60/1
L2L1
PB
Orange
Brown
Grn(9)
P2
P1
123456
HE1
TS1
Gray
ER4
NO
Wht(28)
Grn(9)
P4
XFRM
SEC
C
R
Y1
Y2
On
SW1
1
2
3
4
5
6
7
8
9
10
O/B
G
W1
ODD
W2
C
R
LED
W1
W2
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
NOTE 2
Black
Blue
Red
NOTE 1
ER3
NO
ER2
NO
ER1
NO
Gry(12)
Gry(4)
Gry(6)
G
Grn/Yel(1)
Electric Heat
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Note 3
P3
ECM2
Fan Motor
On/Off
BK
RPM
C2
RPM grnd
C1
EM / W2
ADJUST
DELAY
COOL
Y/Y2
R
Y1
O
W/W1
HEAT
11
12
16
8
1
7
10
3
5
4
6
13
9
15
2
14
11
12
16
8
1
7
6
13
9
10
15
3
5
4
2
14
97P787-01 6/30/08
Wiring Schematic