13
Fig. 20 —
42DH DX Coil Piping Connection Diagram, Left Hand Unit with Preheat Coil Shown
Fig. 21 —
42DV DX Coil Piping Connection Diagram, Right Hand Unit with Preheat Coil Shown
NOTES:
1. Horizontal, left hand unit with pre-heat coil shown.
2. Dimensions are in inches (mm).
HR - Hot Water Return
HS - Hot Water Supply
LL - Liquid Line
SL - Suction Line
COIL HEADER CONNECTION SIZE (NOMINAL OD IN INCHES)
Unit
Size
LL
SL
2 Row HW
1 Row HW
Nom.
Size
OD
Nom.
Size
OD
Nom.
Size
OD
Nom.
Size
OD
0
0
2 (51)
B
D
6-7/8(175)
8-5/8(219)
A
G
H
E
1-5/8 (41)
F
C
06-12
0.375
1/4
3/4
0.875
1/2
0.625
1/2
0.625
16-22
0.375
1/4
1
1.125
1
1.125
1/2
0.625
30
0.625
1/2
1- 1/2 1.625
1-1/2
1.625
1-1/2
1.625
LEGEND
HR
HS
SL
LL
Return Air
Drain
LH TELL-TALE
RH TELL-TALE
NOTE: Vertical, right hand unit with pre-heat coil shown.
HR - Hot Water Return
HS - Hot Water Supply
LL - Liquid Line
SL - Suction Line
0
0
2(51)
B
6-7/8(175)
8-5/8(219)
A
G
DRAIN
RH UNIT
E
1-5/8(41)
F
C
LH UNIT
D
H
TELL-TALE
TELL-TALE
COIL HEADER CONNECTION SIZE (NOMINAL OD IN INCHES)
Unit
Size
LL
SL
2 Row HW
1 Row HW
Nom.
Size
OD
Nom.
Size
OD
Nom.
Size
OD
Nom.
Size
OD
06-12
0.375
1/4
3/4
0.875
1/2
0.625
1/2
0.625
16-22
0.375
1/4
1
1.125
1
1.125
1/2
0.625
30
0.625
1/4
1-1/2
1.625
1-1/2
1.625
1-1/2
1.625
LEGEND
HR
HS
SL
LL
Return Air