Aprilaire 1150 - Manual (Page 18)

MOUNTING THE HUMIDIFIER
Mounting the humidifier on the wall
When mounting on a wood stud wall (studs 16” [406 mm] on center), locate studs and position lag bolts in place so that each of
the bolts centers on a stud. Mark hole locations and predrill ¼” (6 mm) diameter pilot holes. Secure cabinet to wall with lag bolts
provided.
When mounting on a metal stud wall, locate the studs (16” [406 mm] on center) and drill a 3/8” (10 mm) hole through the studs
and wall. Push a 3/8” (10 mm) bolt through the wall, studs, and a backing plate on the backside of the wall and secure with a nut
and washer.
If 16” (406 mm) on-center studs are not available, mount spanner boards on the wall, spanning two studs. If two horizontal boards
are used, locate one at the top of the cabinet for the lag bolts and the other board located 3” (76 mm) on center from the bottom
of the cabinet.
For hollow block or poured concrete wall mounting, mark holes 16” apart. Drill appropriate pilot holes for two 3/8” (10 mm) toggle
bolts or two 3/8” (10 mm) machine bolt lead anchors. Secure cabinet in place.
When suspending the unit from ceiling or roof structural members
Required Parts:
2 Brackets, P/N 4593
4 Bolts, 1/4 - 20, 3/4 long , plated.
4 Nylon insert nuts, 1/4 - 20
8 Flat Washers, 1/4 -20, plated (thin washers)
8 Washers, 1/4 -20, plated
4 Threaded Rods, 3/8 - 16 (length depends on installation specifics. Not provided.)
Procedure:
1. Remove the shroud covering of the humidifier.
2. Insert the first bolt through the side slot farthest to the rear of the humidifier. Follow the “Fastener Sequence” listed below,
ensuring the bolt head is on the inside of the humidifier frame.
3. Repeat the “Fastener Sequence” for the humidifiers vertical side slot located toward the front.
NOTE: The metal of the frame will need to be flexed in order to insert the left front bolt.
4. Repeat steps 2 & 3 for the other side.
5. Use four lengths of 3/8 inch threaded rod to suspend the humidifier. Observe all applicable codes and standards.
Fastener Sequence:
Starting from the inside of the humidifier:
Bolt, flat washer, through the vertical slots on the side of the humidifier frame, 1/4-20 washer, 1/4-20 washer, Bracket
(use the small holes the same side as the slots), flat washer, Nylon insert nut.
Attach one end of the steam hose to the distribution tube and the other end to the humidifier. Secure with 1 1/2” hose clamps
at both ends. Ensure that a minimum pitch of 2”/ft. (15%) is maintained along length of hose. If pitch is not possible, it will be
necessary to install a tee fitting and p-trap. Refer to
Figure 23 on page 26 for details. If the 10’ hose is not long enough to reach
from the humidifier to the distribution tube, use 1-1/2” copper tubing.
INSTALL STEAM HOSE
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