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59CU5A: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
8. Allow at least 1/4-in. per foot (20 mm per meter) of slope down and
away from the furnace in horizontal sections of drain line.
A200094
Fig. 24 – Condensate Drain Connection
Installation of Evaporator Coils
When installing the evaporator coil, refer to the allowed installation
configurations, see
. Some coils require an 8-in. tall sheet metal
spacer between the furnace and the coil or some require a metal shield
between the drain pan of the coil and the discharge flanges of the
furnace. This is to protect the composite drain pan of the evaporator coil.
The coil offset adapter kits in the product accessory list will require an
additional field fabricated adapter to ensure the 8-in. separation.
Table 6 – Evaporator Coil Spacer or Shield Requirements.
NOTE:
1. 3rd Party Coils that are factory-supplied with a metallic shield over
the plastic composite drain pan must completely shield all plastic
composite materials from direct exposure to any part of the heat
exchanger. Consult with 3rd Party Manufacturer to ensure coil is
properly shielded. Coils that are only partially shielded should be
treated as un-shielded and require a spacer.
2. Field-fabricated metallic shield must completely shield all plastic
composite materials from direct exposure to any part of the heat
exchanger. Coils that are only partially shielded should be treated as
un-shielded and require a spacer. Dimensional requirements, see
.
3. For 3rd party unshielded coils, consult manufacturer for design of a
field-fabricated shield that completely shields all plastic composite
materials from direct exposure to any part of the heat exchanger.
All adapters are field fabricated according to the dimensions for the
metal shield, see
, and for the 8-in. tall sheet metal spacer, see
.
A190295
A190296
Fig. 25 – Dimensions Metal Shield
NOTE:
The metal shield in the figure above is only recommended for
use with furnace manufacturer’s A-Coil and may not be compatible with
3rd party coils. In the event the shield shown above is incompatible with
the desired coil, use a spacer or consult 3rd Party Manufacturer for
recommended dimensions and design of suitable shield.
A190301
WARNING
!
FIRE HAZARD
When installing evaporator coils that have composite (plastic) drain
pans and are exposed directly to the furnace heat exchanger, a sheet
metal spacer/transition or drain pan shield is required.
Failure to protect the coil composite drain pan could result in fire,
personal injury, or death. (
Type of Coil
Install Flush
to Furnace
Install with
8-in. Spacer
Install with
Metal Shield
Furnace
Manufacturer’s
N Coil
Allowed
Not Required
Not Required
Furnace
Manufacturer’s
A Coil
Not Allowed
Allowed
(Except 100k BTU size
in Horizontal Right -
MUST use shield)
Allowed
(See Note 2)
3rd Party Coil -
Factory Shielded
(See Note 1)
Allowed
Not Required
Not Required
3rd Party Coil -
Unshielded
Not Allowed
Allowed
(Except 100k BTU size
in Horizontal Right -
MUST use shield)
Allowed
(See Note 3)
Cabinet Size
Dimension “A”
17-in.
10-in.
21-in.
13.5-in.
R
ep
r
esentative d
r
awing only, some models may va
r
y.
A---C
O
IL SHI
E
LD
3--3/4
A+7.5
20---1/2
3--1/2
1--1/2
3--3/4
16--1/2
3--1/2
FR
ONT
Furnace
Furnace
Coil
R
ep
r
esentative d
r
awing only, some models may va
r
y.
Coil Spacer
Fu
r
nace
Coil
Fu
r
nace
20---1/2”
B
8
”