Instruction/ maintenance manual of the product 850 Emerson
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Installation Instructions for Heating & Cooling Digital Model 850 5/1/1 Day Pr ogrammable Thermostat CONTENTS Preparations .................................................. 1 Thermostat Details ........................................ 1 Removing Old Thermostat .
MOUNTING AND WIRING Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur. CAUTION ! ATTENTION! This product does not contain mercury. How- ever, this product may replace a unit which contains mercury.
www.white-rodgers.com MOUNTING AND WIRING CONTINUED FROM SECOND PAGE 4 ‡ The 24 Volt neutral connection to terminal C on the thermostat is not required if the batteries are replaced once a year with fresh “ AA ” Energizer ® alkaline batteries. RH 24 VAC 120 VAC Hot Neutral THERMOSTAT SYSTEM G W Figure 2.
CHECK THERMOST A T OPERA TION www.white-rodgers.com 5 The Display 9 Indicates day of the week. 10 Flame icon ( ) is displayed when the SYSTEM switch is in the HEAT position. Snowflake icon ( )is displayed (non- flashing) when the SYSTEM switch is in the COOL position.
www.white-rodgers.com 1) Select Temporary Hold Time - The thermostat can hold any temperature you set it to for the amount of time you select on this option. Your choices are 0:00 to 8:00 hours in 15 minute increments. 0:00 disables the function Example: 1.
www.white-rodgers.com PROGRAMMING Y OUR THERMOST A T 6 This section will help you plan your thermostat ’ s program to meet your needs. For maximum comfort and efficiency, keep the following guidelines in mind when planning your program.
Symptom P ossible Cause Corrective Action No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker . Replace fuse or reset breaker . (common prob lems) 2. Fur nace pow er switch to OFF . T ur n s witch to ON. 3. Fur nace blo wer compar tment door or Replace door panel in proper position to engage panel loose or not properly installed.
Symptom P ossible Cause Corrective Action No Heat (continued) 5. Heating system requires ser vice or Diagonistic: Set SYSTEM Switch to HEA T and thermostat requires replacement. raise the setpoint abov e room temperature . Within a f ew seconds the thermostat should make a soft click sound.
An important point after buying a device Emerson 850 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson 850 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson 850 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 850 you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 850 will certainly help you make a decision on the purchase.
If you already are a holder of Emerson 850, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson 850.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson 850. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 850 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
