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EPH CONTROLS CP4B Battery Powered Programmable Thermostat User Guide

CP4B  
Battery Powered Programmable Thermostat  
Installation and Operation Guide  
GeneralDetails
NameEPH CONTROLS CP4B Battery Powered Programmable Thermostat User Guide
MakeEPH CONTROLS
LanguageEnglish
FiletypePDF (Download)
File size1.38 MB
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EPH CONTROLS CP4B Battery Powered Programmable Thermostat User Guide
Get the free PDF manual for the EPH CONTROLS CP4B Battery Powered Programmable Thermostat User Guide and access setup steps, usage instructions, and troubleshooting tips. 👉 View online or download now to keep your thermostat running smoothly!

EPH Controls CP4B Manual: Questions and Answers

EPH Controls CP4B specifications

Power supply2 x AA Alkaline Batteries
Maximum load8A 230Vac
Setpoint range5 … 35˚C
Differential0.4˚C
SensorNTC 100K Ohm @ 25˚C
Operating temperature0 … 45˚C
Dimensions130 x 99 x 25mm
Frost protection5˚C

Full specifications, page 6

How do I replace batteries in EPH Controls?

Insert 2 x AA batteries into the compartment below the buttons.

  1. Lower the flap on the front of the thermostat.
  2. Apply downward pressure to remove the battery compartment cover.
  3. Insert the 2 x AA batteries.
  4. Close the battery compartment. User Guide, p. 25

How do I enter the installer menu on EPH Controls CP4B?

Hold Prog and OK for 5 seconds. User Guide, p. 26

What does HHCH t-1 setting do on EPH Controls CP4B?

Sets the maximum heating water temperature setpoint. Range is 45 to 85°C, default 85°C. User Guide, p. 37

What is the difference between HHCH and LLCH settings on EPH Controls CP4B?

HHCH sets maximum heating setpoint (45-85°C, default 85°C). LLCH sets minimum heating setpoint (10-HHCH°C, default 45°C).

SettingPurpose
HHCH t-1Maximum heating water temperature
LLCH t-2Minimum heating water temperature

User Guide, p. 37

What does tFLO mean on EPH Controls CP4B display?

Outlet water temperature received from the OpenTherm boiler. User Guide, p. 35

Why won't EPH Controls copy my schedule to the next day?

Copy function only works in 7 Day mode.

  • Switch to 7 Day mode if currently in 5/2 Day or 24 Hour mode
  • Set times and temperatures for the source day before pressing COPY
  • Verify the next day starts flashing on screen after pressing COPY User Guide, p. 20

What do the operating mode symbols mean on EPH Controls CP4B?

Nor indicates Normal mode, where heating starts at the programmed time. OS is Optimum Start mode, which begins heating early to reach target temperature by program start. TPI is Time Proportional & Integral mode, which cycles heating on and off to prevent overshooting the setpoint. User Guide, p. 30

What heating cycle options are available on EPH Controls CP4B?

The CYC setting determines how often the thermostat cycles heating on and off per hour. You can select 2, 3, 6 or 12 cycles. User Guide, p. 30

EPH Controls CP4B compared with other EPH Controls thermostats

SpecificationEPH Controls CP4BEPH Controls HRTEPH Controls CDC2EPH Controls CDT2-24
Maximum load8A 230Vac8A 230Vac10(3)A 230VAC5(1)A 24VAC
Setpoint range5 … 35˚C5 … 35˚CHot Water 5 … 90˚C5 … 35˚C
Operating temperature0 … 45˚C0 … 45˚C0 … 45˚C0 … 45˚C
Dimensions130 x 99 x 25mm85 x 85 x 36mm91 x 91 x 26mm91 x 91 x 26mm

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