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The information contained herein is believed to be reliable, but no representations, guarantees, or warrantees of any kind are made as 
to its accuracy, suitability for particular applications or the results to be attained therefrom.  Before using, the user shall determine 
suitability of the information for user’s intended use and shall assume all risk and liability in connection therewith.  To the extent 
permitted by law, REHAU DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. 

 

INSTRUCTIONS 

REHAU PD1 AND PD2 THERMOSTAT 

 

 
Table of Contents

 

Specifications

..............................................................................................................................................................1

 

Display / Keypad Operation

......................................................................................................................................2

 

General

.........................................................................................................................................................................2

 

Sequence of Operation

..............................................................................................................................................4

 

Installation

....................................................................................................................................................................6

 

View Menu

...................................................................................................................................................................8

 

Adjust Menu

.................................................................................................................................................................9

 

Error Messages

.........................................................................................................................................................15

 

Wiring Examples

.......................................................................................................................................................17

 

 
 

Specifications 

 
 

Programmable Thermostat PD1 One Stage Heat Art. 236457 
 

Control — Microprocessor PI control; This is not a safety (limit) control. 
Packaged weight — 0.46 lb. (210 g), Enclosure J, white PVC plastic. 
Dimensions — 2-7/8” H x 2-7/8” W x 13/16” D (73 x 73 x 21 mm) 
Approvals — CSA C US, meets ICES & FCC regulations for EMI/RFI. 
Ambient conditions — Indoor use only, 32 to 122°F (0 to  50°C), < 90% RH non-
condensing. 
 
Power supply — 24 V ±10% 60 Hz 3 VA 
Relays — 24 V (ac) 2 A, Latching 
Sensors — NTC thermistor, 10 k

@ 77°F (25°C ±0.2°C) ß=3892  

Optional — REHAU #: 070, 071, 072, 073, 079. 

 
Programmable Thermostat PD2 Two Stage Heat / Heat-Cool Art. 236467 

Control — Microprocessor PI control; This is not a safety (limit) control. 
Packaged weight — 0.46 lb. (210 g), Enclosure J, white PVC plastic 
Dimensions — 2-7/8” H x 2-7/8” W x 13/16” D (73 x 73 x 21 mm) 
Approvals — CSA C US, meets ICES & FCC regulations for EMI/RFI. 
 
Ambient conditions — Indoor use only, 32 to 122°F (0 to  50°C), < 90% RH non-
condensing. 
Power supply — 24 V ±10% 60 Hz 3 VA 
Relays — 24 V (ac) 2 A, Latching 
Sensors — NTC thermistor, 10 k

@ 77°F (25°C ±0.2°C) ß=3892 

Included — None 
Optional — REHAU type #: 070, 071, 072, 073, 079. 

 

Summary of Contents for 236457

Page 1: ...ne Stage Heat Art 236457 Control Microprocessor PI control This is not a safety limit control Packaged weight 0 46 lb 210 g Enclosure J white PVC plastic Dimensions 2 7 8 H x 2 7 8 W x 13 16 D 73 x 73...

Page 2: ...cycles and accumulating a knowledge of just how the heating system is working This allows the thermostat to anticipate the system and prevent a system short cycling In order to prevent short cycling...

Page 3: ...is being used to measure the zone temperature the temperature of the active sensors is averaged and used to calculate the on time of the relay s Slab Sensor A slab sensor is used to measure the slab...

Page 4: ...e Off mode a freeze protection is enabled that allows the Heat relay to be operated to keep the zone above 35 F 2 C PD2 Two Stage Heat The two stage mode of operation is selected using the DIP switch...

Page 5: ...e above 35 F 2 C PD2 Heat Cool The Heat Cool mode of operation is selected using the DIP switch located on the circuit board inside the thermostat Air Sensor s Only Operation When operating with only...

Page 6: ...no interlock between the heating and cooling temperature Installation STEP ONE GETTING READY Check the contents of this package If any of the contents are missing or damaged please contact your wholes...

Page 7: ...thermostat Auxiliary Sensors S1 and S2 Either an indoor slab or remote sensor may be connected to the S1 input Connect the two wires from the auxiliary sensor to the Com and S1 terminals 3 and 4 Heat...

Page 8: ...current air temperature for the space If the optional sensor is not used for the floor slab but for the room this is the average temperature Outdoor The current temperature at the outdoor sensor Sens...

Page 9: ...an active air sensor and be set to either Heat or Auto 35 to 100 F 1 5 to 38 0 C Room Cool No Schedule Desired temperature for cooling Must have an active air sensor and be set to either Cool or Auto...

Page 10: ...or Auto 35 to 100 F 1 5 to 38 0 C Room Heat Sleep Desired temperature for Sleep time Must have an active air sensor and be set to either Heat or Auto 35 to 100 F 1 5 to 38 0 C Room Cool Wake Desired r...

Page 11: ...eep time Must have an active air sensor and be set to either Cool or Auto 35 to 100 F 1 5 to 38 0 C Slab Minimum Wake Minimum slab temperature at wake time Must have an active slab sensor OFF 34 to 12...

Page 12: ...lects the type of auxiliary sensor present in the Sen 1 input This item is only available in the Installer access level OFF Indr thermostat averages in this case SLAB OUTside Room Sensor Selects wheth...

Page 13: ...evel 10 to 180 min Cooling Minimum On Sets the minimum on time of the cooling contact This is to prevent short cycling This item is only available in the Installer access level 0 30 to 5 00 min Coolin...

Page 14: ...Page 14 of 19 Adjust Menu 6 of 6 Lite Sets the operation of the back lighting of the LCD ON Tmpy ON OFF Units The units of temperature used to display the items F C...

Page 15: ...he fault is corrected press any button to clear the error message Room Short The thermostat s internal air sensor is short circuit This cannot be repaired in the field The thermostat should be replace...

Page 16: ...Sensor 1 Open The auxiliary sensor connected to the Sens 1 terminal is open circuit Locate and repair the problem as described in the appropriate sensor brochure After the fault is corrected press an...

Page 17: ...aller Us Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2A No Power 158033 PD1 C US Zone Pump 24V ac Class II Transformer Wiring to Powered 24 V ac Relay T Typical 1 T 2 N L Powered Relay 5 6 R C Com S1 ON 1...

Page 18: ...taller Us Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2A No Power 158033 PD2 C US 5 6 7 8 24V ac Class II Transformer Cooling One Stage Heat with Zone Pump and Cooling Zone Pump T Typical 1 T 2 N L Powered...

Page 19: ...taller Us Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2A No Power 158033 PD2 C US R C Com S1 ON 1 Heat2 Cool Heat 2 1 2 3 4 PD 2 236467 Heat Cool or 2 Stage Heat Installer Us Power 24 V 10 60 Hz 3 VA Relay...

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