1F80-361 37-6621C - Emerson Electric

1 1F80-361 . Programmable Electronic Digital Thermostat INSTALLATION AND. OPERATION INSTRUCTIONS. Opera tor Opera tor:: Save these instr Sav uctions ffor instructions or futur futuree use! FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY. BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE. PERSONAL INJURY AND/OR PROPERTY DAMAGE. DESCRIPTION. Your new white - rodgers 5-Day/1-Day/1-Day Digital Thermo- Temperature override until next program period stat uses the technology of a solid-state microcomputer to Manual program override (HOLD temperature). provide precise time/temperature control. This thermostat offers Temporary HOLD. you the flexibility to design heating and cooling programs that fit F/ C convertibility your needs. Temperature range 45 to 90 F. Features: RC, RH, C, W, Y, G , O and B terminals Separate 5-day (weekday), 1-day (Sat) and 1-day (Sun) pro- Optional C terminal (Dual Power option).

2 Gramming with four separate time/temperature periods per day B and O terminals for single stage heat pumps (no auxiliary Simultaneous heat and cool program storage heat ) or damper operation Preprogrammed temperature control Program storage in case of power loss Backlit display 2 AA alkaline batteries included LCD continuously displays setpoint, and alternately dis- plays time and room temperature PRECAUTIONS. This thermostat is intended for use with a low voltage system; do not use this thermostat with a line voltage system. If in doubt ! WARNING. about whether your wiring is millivolt, line, or low voltage, have Do not use on circuits exceeding specified voltage. it inspected by a qualified heating and air conditioning contractor Higher voltage will damage control and could cause or electrician. shock or fire hazard.

3 Do not exceed the specification ratings. Do not short out terminals on gas valve or primary control All wiring must conform to local and national electrical codes and to test. Short or incorrect wiring will damage thermostat ordinances. and could cause personal injury and/or property dam- This control is a precision instrument, and should be handled age. carefully. Rough handling or distorting components could cause Thermostat installation and all components of the sys- the control to malfunction. tem shall conform to Class II circuits per the NEC code. ! CAUTION. To prevent electrical shock and/or equipment damage, disconnect Electric power to system at main fuse or circuit breaker box until installation is complete. SPECIFICATIONS. ELECTRICAL DATA APPLICATIONS. Electrical Rating: For use with: 8 to 30 VAC 50/60 Hz.

4 Or Standard heat /cool or heat only systems to Amps (Load per terminal) Electric heat systems Amps Maximum Total Load (All terminals combined) Gas or oil fired systems THERMAL DATA Gas systems with intermittent ignition devices ( ). and/or vent dampers Setpoint Temperature Range: hydronic (hot water or steam) systems 45 F to 90 F (7 C to 32 C) Single-stage heat pump systems (no auxiliary heat ). Operating Ambient Temperature Range: Millivolt systems 32 F to 105 F. Operating Humidity Range: DO NOT USE WITH: 0 to 90% RH (non-condensing) Multi-stage systems Shipping Temperature Range: Systems exceeding 30 VAC and amps -4 F to 149 F 3-wire zoned hydronic heating systems white - rodgers is a division PART NO. 37-6621C . of Emerson Electric Co. Replaces 37-6621B. 0745. INSTALLATION. REMOVE OLD THERMOSTAT. Screw anchors 1. Shut off electricity at the main fuse box until installation is complete.

5 Ensure that electrical power is disconnected. 2. Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermo- stat and the wall mounting plate as an assembly. 3. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat. 4. Disconnect the wires from old thermostat one at a time. DO. NOT LET WIRES FALL BACK INTO THE WALL. 5. Install new thermostat using the following procedures. ATTENTION! Mounting Mounting holes This product does not contain mercury. However, this product holes Electric /Gas may replace a unit which contains mercury. switch Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing nonabsorbent gloves, take Figure 1.

6 Thermostat Base up the spilled mercury with sand or other absorbent material and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded. Mercury must not be discarded in household trash. When the 6. Push excess wire into wall and plug hole with a fire-resistant unit this product is replacing is to be discarded, place in a material (such as fiberglass insulation) to prevent drafts suitable container and return to white - rodgers at 2895 Harrison from affecting thermostat operation. Street, Batesville, AR 72501 for proper disposal. BATTERY LOCATION. Electric heat OR SINGLE-STAGE 2 "AA" alkaline batteries are included in the thermostat at the heat PUMP SYSTEMS factory with a battery tag to prevent power drainage. You must remove the battery tag to engage the batteries batteries.

7 This thermostat is configured from the factory to operate a heat /. cool, fossil fuel (gas, oil, etc.), forced air system. It is configured If BATT is displayed, the batteries are low and should be correctly for any system that DOES NOT require the thermostat replaced. For best results, replace all batteries with new pre- to energize the fan on a call for heat . If your system is an Electric mium brand alkaline batteries such as Duracell or Energizer . heat or heat -pump system that REQUIRES the thermostat to To replace batteries, install the batteries along the top of the turn on the fan on a call for heat , locate the Electric /GAS base (see Fig. 1). The batteries must be installed with the switch on the back of the thermostat (see fig. 1) and switch it to positive (+) end to the left. the Electric position. This will allow the thermostat to energize the fan immediately on a call for heat .

8 If you are unsure hydronic (HOT WATER OR STEAM). if the heating/cooling system requires the thermostat to control HEATING SYSTEMS. the fan, contact a qualified heating and air conditioning service person. This thermostat is set to operate properly with a forced-air heating system. If you have a hydronic heating system (a system that heats with hot water or steam), you must set the ATTACH THERMOSTAT BASE TO WALL thermostat to operate properly with your system. Change the 1. Remove the packing material from the thermostat. Gently second option in the configuration menu to SL (see CONFIGU- pull the cover straight off the base. Forcing or prying on the RATION MENU, page 4). thermostat will cause damage to the unit. If necessary, move the Electric heat switch (see Electric heat SYSTEMS. SYSTEMS, CHECK THERMOSTAT OPERATION.)

9 Above). If at any time during testing your system does not operate 2. Connect wires beneath terminal screws on base using properly, contact a qualified service person. appropriate wiring schematic (see figs. 2 through 7). 3. Place base over hole in wall and mark mounting hole Turn on power to the system. locations on wall using base as a template. 4. Move base out of the way. Drill mounting holes. Fan Operation 5. Fasten base loosely to wall, as shown in fig. 1, using two If your system does not have a G terminal connection, skip to mounting screws. Place a level against bottom of base, Heating System System. adjust until level, and then tighten screws. (Leveling is for 1. Move FAN switch to ON position. The blower should begin appearance only and will not affect thermostat operation.) If to operate. you are using existing mounting holes, or if holes drilled are 2.

10 Move FAN switch to AUTO position. The blower should too large and do not allow you to tighten base snugly, use stop immediately. plastic screw anchors to secure subbase. 2. JUMPER THERMOSTAT. WIRE C B O Y G W RC RH. THERMOSTAT SYSTEM. C B O Y G W RC RH. SYSTEM Hot Cooling Fan Heating 24 VAC 120 VAC. System Relay System Fan Heating Neutral Relay System Hot HEATING. 24 VAC 120 VAC TRANSFORMER. NOTE. For 2-wire heat only, Neutral Hot attach to RH and W TRANSFORMER. 24 VAC 120 VAC. Figure 2. Typical wiring diagram for Neutral heat only, 3-wire, single transformer systems COOLING TRANSFORMER. Figure 5. Typical wiring diagram for heat /cool, 5-wire, two-transformer systems JUMPER. WIRE. THERMOSTAT. C B O Y G W RC RH. SYSTEM JUMPER JUMPER. WIRE WIRE. Cooling Fan THERMOSTAT. C B O Y G W RC RH. System Relay Hot SYSTEM. 24 VAC 120 VAC.