Crestron CHV-TSTATEX Installationsanleitung PDF herunterladen (Seite 31)

Crestron CHV-TSTAT and CHV-THSTAT Thermostats

Operations and Installation Guide – DOC. 8163E Thermostats: CHV-TSTAT and CHV-THSTAT

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NOTE: When the Reverse SMODE Dir (reverse system mode direction) selection is

set to Yes on the “SCRN OPTIONS” (screen options) setup screen, the arrow keys

(▲ ▼) can be used to select system mode functions in both directions.

NOTE: If an out of range setpoint is entered, it is ignored.

NOTE: The screen options selected during setup are seen when the View key is

pressed in normal operation.

System Types and Definitions

The first setup choice is the heat system type. There are three main types of

heating/cooling systems:

1. Heat/Cool, Radiant Heat or Forced Air Heating/Cooling, 1 or 2 Stages

2. Heat Pump, 1 or 2 Stages, Auxiliary Heat or Dual Fuel

3. Slab System (Slab1 through Slab 5B)

1. Heat/Cool Systems Definitions

Radiant Heat: Radiant heat is a form of hydronic (hot water) heat that

circulates hot water through pipes (baseboard radiation systems) or special

tubing and installs on the perimeter of the house or underneath floors.

Forced Air: In a ducted heating/cooling system, a large fan (blower) forces

heated air from the furnace into the ducts and enters the rooms through a

One or Two Stages: Unlike traditional furnaces that turn on and run at full

capacity with each demand for heating, 2-stage furnaces operate like two

separate furnaces. The unit begins to run in its first stage, and operates at a

fraction of its heating capacity. This reduced capacity is sufficient on mild

winter days. On very cold days, the furnace adjusts to full capacity (second

stage) to meet the demand for heat.

Refer to “Heat/Cool, 1 or 2 Stages, Forced Air or Radiant” which begins on

page 27.

2. Heat Pump Systems Definitions

A heat pump extracts available heat from one area and transfers it to

another. Even cold air contains some heat, and heat pumps can extract heat

from the outside air on a cold day and transfer it indoors to maintain a

comfortable temperature. A heat pump also works in reverse during the

summer, extracting heat from indoors and transferring it outdoors.

Dual Fuel: A dual fuel system combines an energy efficient air source heat

pump with a new or existing oil, gas or propane furnace. The furnace runs

in place of the heat pump in cold weather.

Aux (Auxiliary) Heat: When the a heat pump can no longer efficiently

transfer heat from the outside air, the thermostat automatically turns on a

secondary heat source, such as electric resistive heat.

Refer to “Heat Pump, 1 or 2 Stages, Aux Heat or Dual Fuel” which begins

on page 31.

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