Duct Mounting - Honeywell LP916A-C Installation Instructions Manual

Mount Thermostat (Fig. 5 or 6).
Fig. 5. Terminal unit top view with thermostat mounted in
preferred position.
Carefully uncoil and extend capillary tubing. Make a
5/8-in. (16 mm) hole in unit wall between end
compartment and filter and coil compartment, or use
existing knockout. Insert sensing bulb, with capillary,
through hole. Locate bulb in appropriate position
between return air filter and coil. Bush hole in unit wall
to protect capillary tubing.
NOTE: The sensing bulb must not be situated where
is will be affected by any outdoor airflow
across it (e. g., a unit which uses a fixed-
percentage outdoor air damper).
Mount two bulb hangers (Fig. 6). Clip to drain pan
or edge of frame member. Tap top end to ensure
firm mounting.
Fig. 6. Alternate mounting of thermostat at bottom front
of end compartment.
LP916A-C PNEUMATIC REMOTE BULB THERMOSTATS
Snap sensing bulb into position.
Before connecting air, leave main line disconnected for
about one minute to clear and dry tubing. Air
connections are 1/4-in. push-on sharp-barb type and
are labeled M and B for Main and Branch.
NOTE: If air connections are towards back, connect
appropriate lengths of tubing to barb
connectors before mounting.

Duct Mounting

Duct mounting requires a 107324A Duct Bulb Holder (Fig. 7).
The sensing bulb should be located in the duct where air of
representative temperature can freely circulate around it.
Avoid mounting the bulb close to hot pipes, cooling coils, and
other places where air temperature is not representative.
S3879
Fig. 7. 107324A duct bulb holder.
Cut a 3/4-in. (19 mm) diameter hole in duct wall to admit
sensing bulb and bulb holder.
Mount the Thermostat near the hole in the duct.
NOTE: Mount either on top of duct or on a bracket or
angle iron; obtain locally.
Using bulb holder as a template, mark and drill holes for
bulb holder and mounting screws.
Break off bulb holder to desired length as shown in
Figure 8.
NOTE: Bulb holder should be long enough to hold
sensing bulb in freely circulating air away from
duct wall. Neatly coil any excess capillary
tubing at Thermostat case or at bulb holder.
S3880-2
Fig. 8. Shortening bulb holder.
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