Installation Guide
Two Pipe Single Temperature,Room Thermostats
CTC–5500 Series
Mounting
Mount the CTC-5500 Series thermostats away from excessive drafts and direct sunlight. Choose the location
best suited for measuring the average room temperature. Units may be mounted horizontally or vertically to
either a 2" x 4" electrical box or a hollow wall.
Electrical Box Mounting
1. Attach the vertical (HMO-5036, HMO-5037) or
horizontal (HMO-5038 or HMO-5039) backplate to
the box with the two 6-32 screws provided.
2. Level the box using the slot in the backplate.
3. Fit the aluminum plate into the recess.
4. Pass the 5/32" I.D. tubing through access hole.
5. Make connections per “Connections”.
6. Mount thermostat to backplate with two 6-20
screws supplied with thermostat.
Hollow Wall Mounting -
Thermostats may be directly
mounted on walls using a surface mounting block
(HMO-5002 or HMO-5012 or a 2" x 2" insulating
standoff (HMO-5014, HMO-5016).
1. Using the diagram, make a 1/2" (13 mm) diameter
clearance hole in the wall.
2. Attach the surface mounting block or insulated
standoff with two 6-32 x 2" screws supplied.
3. Make all connections per the “Connections” section.
4. Center thermostat and tighten screws.
HMO-5036: Vertical backplate,
light almond
HMO-5037: Vertical backplate,
ash white
HMO-5038: Horizontal backplate,
light almond
HMO-5039: Horizontal backplate,
Insulating Plate
HMO-5002, light almond
HMO-5012, ash white
