Installation - Rehau PD1 Instructions Manual

Auto In the Auto mode, the thermostat automatically switches between heating and cooling the space.
However, the heating operation has priority over the cooling operation. In this mode, the minimum slab
temperature is maintained even when the thermostat is cooling the air
Heat In the Heat mode, the Heat 1 relay is operated to satisfy the heating temperature requirement of the
zone and cooling is disabled
Cool In the Cool mode, the Cool relay is operated to satisfy the cooling temperature requirement of the zone
and heating is disabled. If a slab sensor is used, the slab minimum is ignored
Off In the Off mode, the Heat 1 and Cool relays are not operated
Note: If an air or slab sensor is active in the Off mode, a freeze protection is enabled that allows the Heat 1
relay to be operated to keep the zone above 35° F (2 ° C)
Heating / Cooling Interlock
Time Interlock
In order to prevent frequent changes between heating and cooling, the thermostat has a Cooling Interlock
setting. Once the Heat 1 relay has been off for a minimum of one heating cycle or the length of the Cooling
Interlock, (whichever is longer) cooling is permitted
Temperature Interlock
When in the Auto mode, the cooling temperature is limited to 3° F (1.5° C) above the heating temperature . If
the cooling temperature is set below the heating temperature, the thermostat automatically adjusts the
cooling setpoint When operating in the Cool mode, there is no interlock between the heating and cooling
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temperature.

Installation

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STEP ONE
Check the contents of this package. If any of the contents are missing or damaged, please contact your wholesaler or
REHAU technical associate for assistance.
Type PD1 Includes: One Programmable Thermostat PD1, PD1 / PD2 Instructions
Type PD2 Includes: One Programmable Thermostat PD2, PD1 / PD2 Instructions
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STEP TWO
FRONT COVER
Place a screwdriver or similar object into the small slot located in the top of the
thermostat. Push the screwdriver against the plastic tab and pull the top of the front cover
so that it pivots around the bottom edge of the base.
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STEP THREE
BASE
The thermostat should be installed on an interior wall of the desired zone approximately 5' (1.5m) above the floor. Do
not mount the thermostat in a location that may be affected by localized heat sources or cold drafts. It may be
necessary to install a draft barrier behind the thermostat to prevent air from blowing through the wiring hole and
affecting the thermostat's built-in sensor.
Mount the base directly to the wall using two #6 1" screws. The screws are inserted
through the mounting holes and must be securely fastened to the wall. If possible, at
least one of the screws should enter a wall stud or similar surface. If the thermostat is
to be mounted to a 2" x 4" electrical box, order an Adapter Plate 007. This plate
mounts to the electrical box and the thermostat mounts to the plate. Ensure that the
electrical box does not provide cold air to the thermostat.
Note: If the thermostat is to be used for remote sensing (i.e. The built-in
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REMOVING THE
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GETTING READY
MOUNTING THE