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HORIZONTAL OR VERTICAL UNIT — VERTICAL COIL
REMOVAL (39LB,LC,LF,LH Units) — Item numbers are in
Fig. 50 unless otherwise indicated.
1. Refer to Fig. 10 for service area requirements.
2. Disconnect piping (Item 6).
3. Horizontal Unit, 39LB and 39LC — On top panel
(Item 4) remove screws located directly above side panels
(Items 2 and 7). Top panels may be removed from unit to
provide more workspace, but it is not required.
Vertical Unit, 39LF and 39LH — Through fan access
door (Item 2, Fig. 48), remove screws (Item 3, Fig. 48)
holding angle (Item 4, Fig. 46) to top of coil panels
(Item 7, Fig. 48).
Remove rear panel (Item 17, Fig. 48) and remove baffle
angle screws (Item 5) holding top baffle to coil.
4. Remove side panel(s) (Item 7).
NOTE: Vertical units may require support of fan section
after removal of side panels.
5. If accessory is present, remove accessory side panel
(Item 1) on left side of unit. Detach filter track support
bracket if upstream accessory is a filter.
6. Remove screws (Item 8) from inside baffle (Item 3).
Leave baffle attached to left side panel (Item 2).
7. Slide coil and header end baffle from unit.
8. Replace coil by reversing preceding Steps 1-7.
Fig. 50 — Horizontal or Vertical Unit — Vertical Coil Removal (39LB,LC,LF,LH Units)
1 — Accessory Side Panel
2 — Left Side Panel
3 — Inside Baffles
4 — Top Panels
Changing Coil Hand
NOTE: Electric heat coil hand cannot be changed.
NOTE: The coil cover panel is not part of the coil. Remove
cover panel from end of unit. New holes must be cut in coil
cover panel. Original holes must be plugged and insulated.
New side panels may be necessary when changing coil hand.
NU-FIN COILS — The NuFin coil is airflow direction sensi-
tive, especially when used in dehumidifying applications.
Hydronic versions are counterflow circuited for full gravity
draining when installed level.
Correct installation will result in the typical bottom inlet on
leaving air face and top outlet on entering air face of coil, a
self-venting design. This will ensure cold air contact with cold
water, and warm air with hot water.
Coil repositioning for opposite hand application will com-
promise one or more of these characteristics. However, there
will be those situations where this may prove acceptable.
As a general rule, a change from counterflow circuiting to
parallel flow for sensible heating and cooling applications will
result in a 5% drop in net capacity per row of coil. In one and
two row heating coils, the actual drop may not be measurable,
thus of insignificant consequence.
It is important that the airflow direction of the NuFin coil be
adhered to when latent cooling is possible. Significant moisture
carryover from the face of the dehumidifying coil will result if
LEGEND
5
— Baffle Angle Screw
6
— Piping
7
— Right Side Panel
8
— Baffle Screw
41
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