Honeywell TB6575B1000/U Installation Instructions - Page 3

TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS a The five relays are wired via terminals W, Y, Gh, Gm, and Gl. Relay 1 controls Heat open (W) or Cool open (Y). Relay 2 controls Cool open or Electrical heater output (Y/A). Relays 3, 4, and 5 control the High, Medium, and Low fan speeds respectively (Gh, Gm, and Gl). NOTE: In 2-pipe configurations without Auxiliary Heat, only 4 relays are used; relay 2 (Y/A) is not used. b Pipe sensor is required for 2 pipe auto changeover and 2 pipe auxiliary heat applications. 3-13/16 (97) 5-13/16 (148) IMPORTANT 1-1/8 Do not mount the device where it can be affected by: (29) 1. Drafts or dead spots behind doors or in corners. 2. Hot or cold air from ducts. 3. Radiant heat from the sun or appliances. 4. Unheated (uncooled) areas such as an outside wall behind the thermostat. 5. Concealed pipes or chimneys. Mounting and Wiring THERMOSTAT SUB-BASE 3-1/4 (83) 1-3/16 (30) 5/32 (4) 5/32 UP (4) 1-3/4 (44) 2-3/8 (60) M27589 Fig. 1. Dimensions in inches (mm). INSTALLATION When Installing this Product... 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. 3. Installer must be a trained and experienced service technician. WARNING Risk of electrical shock. Can cause severe injury, property damage or death. Disconnect power supply before installation and before servicing. IMPORTANT The thermostats are line voltage powered devices. All wiring must comply with national and local electrical codes, ordinances and regulations. Provide disconnect means and overload protection, as required. The TB8575A1000 thermostat must be powered by an Approved 24 Vac, Class 2, NEMA rated transformer (such as a W6380 Relay Control Center). Location The thermostats are the temperature control element in a fan coil or air-conditioning system. They must be located about 1.5m (5 ft.) above the floor, in a position with good air circulation, to sense room temperature. CAUTION Equipment damage hazard. Operation at low temperatures can cause fan coil damage. This thermostat is not a safety device. Do not use it where the space temperature is outside of the device operating range. A display of two dashes, - -, for the Room Temp display indicates a sensor failure or a temperature outside of the thermostat operating range of 18°C to 49°C (0°F to 120°F). With - - displayed, the thermostat ceases to operate. When the temperature returns to within its operating limits, the thermostat returns to operation. The optional freeze protect feature should be used if low temperatures can occur. The thermostat must be mounted flush to the wall. The thermostat can be mounted directly to a 2 x 4 in. horizontal junction box (see Fig. 2 on page 4). An optional adaptor plate (50033847-001) can be used with a 4 x 4 in. or a vertical junction box for which mounting screws are supplied (see Fig. 3 on page 4). 1. Prepare the supply wires: a. Mounting on a 4 x 4 in. or vertical 2 x 4 in. junction box: (1) Feed the supply wires through the junction box and the opening in the adaptor plate. (2) Affix the adaptor plate to the junction box using the screws provided. b. Mounting on a horizontal 2 x 4 in. junction box: Feed the supply wires through the opening of the junction box. 2. Attach the supply wires: a. For the TB6575A1000 and TB6575B1000 models: (1) Push the fly lead wires through the wiring access hole in the sub-base. (2) Attach the fly lead wires to the supply wires using wire nuts (not provided).See Table 3 on page 5 for terminal and lead identification. (3) Push the fly lead and supply wires back into the junction box. b. For the TB8575A1000 model (which does not have pre-wired fly leads): 3 62-0311-05