1F82-261 - climate.emerson.com

1 1F82-261 . Programmable Electronic Digital Heat Pump Thermostat INSTALLATION AND. OPERATION INSTRUCTIONS. Operator: Save these instructions for future 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 5-Day/1-Day/1-Day Digital Thermostat uses the tech- LCD continuously displays set point, and alternately nology of a solid-state microcomputer to provide precise time/ displays time and room temperature temperature control. This thermostat offers you the flexibility to Continuous Backlit display option design heating and cooling programs that fit your needs. Temperature override until next program period Features: Manual program override (HOLD temperature). Separate 5-day (weekday) and 1-day/1-day (Saturday/ Temporary HOLD. Sunday) programming with four separate time/temperature F/ C convertibility periods per day Temperature range 45 to 90 F.

2 Simultaneous heat and cool program storage R, C, Y, W2, G, O/B, E, and L terminals for single or Preprogrammed temperature control two-transformer systems Optional battery back-up for AC power loss PRECAUTIONS. This thermostat is intended for use with a low voltage NEC. Class II system. Do not use this thermostat with a line voltage ! WARNING. system. If in doubt about whether your wiring is millivolt, line, Do not use on circuits exceeding specified voltage. or low voltage, have it inspected by a qualified heating and air Higher voltage will damage control and could cause conditioning contractor or electrician. shock or fire hazard. Do not exceed the specification ratings. Do not short out terminals on gas valve or primary All wiring must conform to local and national electrical codes control to test. Short or incorrect wiring will damage and ordinances. thermostat and could cause personal injury and/or This control is a precision instrument, and should be handled property damage.

3 Carefully. Rough handling or distorting components could cause Thermostat installation and all components of the system the control to malfunction. shall conform to Class II (current limited) circuits per the NEC code. Failure to do so could cause a fire hazard. ! CAUTION. To prevent electrical shock and/or equipment damage, ! WARNING. disconnect electric power to system at main fuse or For California Residents: This product contains a circuit breaker box until installation is complete. chemical known to the state of California to cause cancer and birth defects and other reproductive harm. SPECIFICATIONS. ELECTRICAL DATA Shipping Temperature Range: Electrical Rating: -4 F to 149 F. 20 to 30 VAC 50/60 Hz. or APPLICATIONS. to Amps (Load per terminal) For use with the following Class II systems: Amps Maximum Total Load (All terminals combined) Standard heat pump systems with electric, gas or oil Aux THERMAL DATA heat with 24 VAC Hot and Common available Setpoint Temperature Range: Single-stage heat pump systems with no Aux heat with 45 F to 90 F (7 C to 32 C) 24 VAC Hot and Common available Operating Ambient Temperature Range: 32 F to 105 F DO NOT USE WITH: Operating Humidity Range: Millivolt systems 0 to 90% RH (non-condensing) Systems exceeding 30 VAC and amps 3-wire zoned hydronic heating systems PART NO.

4 37- 6175G. Replaces 37-6175F. 1632. INSTALLATION. REMOVE OLD THERMOSTAT Optional (2) "AA" batteries 1. Shut off electricity at the main fuse box until installation is Screw anchors complete. 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 thermostat 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 O/B. NOT LET WIRES FALL BACK INTO THE WALL. W904. switch 5. Install new thermostat using the following procedures. Mounting ATTENTION! hole This product does not contain mercury. However, this product W904. may replace a unit which contains mercury. Electric/Gas Mounting hole Do not open mercury cells.

5 If a cell becomes damaged, do not jumper touch any spilled mercury. Wearing nonabsorbent gloves, take Figure 1. Thermostat Base up the spilled mercury 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 unit ENERGY MANAGEMENT RECOVERY. this product is replacing is to be discarded, place in a suitable (EMR). container. Refer to for location When the EMR feature is activated the thermostat's microcomput- to send the product containing mercury. er calculates the time it will take to change the room temperature to the next heat or cool program setting. Then the thermostat ATTACH THERMOSTAT BASE TO WALL will start the system before the next programmed period so that 1. Remove the packing material from the thermostat. Gently pull the the desired temperature is reached at or near the beginning of cover straight off the base.

6 Forcing or prying on the thermostat the period (the thermostat calculates 15 minutes for every 1 F. will cause damage to the unit. temperature change). This minimizes the use of auxiliary stages 2. Connect wires beneath terminal screws on base using ap- during the transition period to reduce energy costs. propriate wiring schematic (see figs. 2 through 4). For example: The thermostat is programmed to provide an over- 3. Place base over hole in wall and mark mounting hole locations night heating temperature of 66 F, and during the next program on wall using base as a template. period, beginning at 6:00 AM, the programmed temperature 4. Move base out of the way. Drill mounting holes. is 70 F. With EMR activated, the thermostat will automatically 5. Fasten base loosely to wall, as shown in fig. 1, using two start the heating system at 5:00 AM, so that the programmed mounting screws. Place a level against bottom of base, temperature of 70 F is reached by about 6:00 AM.

7 Adjust until level, and then tighten screws. (Leveling is for If the overnight room temperature drops only to 68F , the ther- appearance only and will not affect thermostat operation.) mostat will start the system at 5:30 to reach the programmed If you are using existing mounting holes, or if holes drilled temperature of 70 F at 6:00. are too large and do not allow you to tighten base snugly, The thermostat is shipped with the EMR feature active, which use plastic screw anchors to secure subbase. means that the thermostat will start the heating system before 6. Push excess wire into wall and plug hole with a fire -resistant the beginning of the next program period. This feature provides material (such as fiberglass insulation) to prevent drafts from better efficiency by allowing gradual temperature changes using affecting thermostat operation. only the first stage of heat. To deactivate the EMR function, see the Configuration menu ELECTRIC/GAS JUMPER (Fan Option) on Page 5).

8 The thermostat will then wait until the programmed Read the following information before clipping the nonelectric time to start the system for a temperature change. heat jumper. If you are unsure of your application, contact a qualified service person. O/B TERMINAL SWITCH SELECTION. If your emergency or auxiliary system will energize the blower, The O/B switch on this thermostat is factory set to the O position. then jumper, W904, on the thermostat base must be cut (see This will accommodate the majority of heat pump applications, fig. 1). which require the changeover relay to be energized in COOL. If your emergency or auxiliary heat system requires that the If the thermostat you are replacing or the heat pump being in- thermostat energize the fan circuit, do not cut jumper W904. stalled with this thermostat requires a B terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the B position.

9 OPTIONAL BATTERIES. With two "AA" batteries installed, your thermostat will maintain time and continuously display the temperature during a loss of AC power. Installed batteries will also allow programming prior to installation. For best results, use new premium brand batteries such as Duracell or Energizer . 2. WIRING DIAGRAMS. THERMOSTAT. O/B Y G W2 E C L R. SYSTEM. See Note ** SYSTEM. Changeover MONITOR. Relay* Fan Emergency SWITCH. Compressor Aux Relay Relay Relay Contactor (Stage 2). Hot 24 VAC 120 VAC. * Changeover Relay is energized in COOL when O/B switch is in the O position Neutral Changeover Relay is energized in HEAT when O/B switch is in the B position TRANSFORMER. ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency (Class II Current Limited). Figure 2. Typical wiring diagram for single transformer systems NOTE. If safety circuits are in only one of the systems, remove the transformer of the system with NO.

10 Safety circuits. THERMOSTAT. O/B Y G W2 E C L R. CUT AND SYSTEM. TAPE OFF! See Note ** SYSTEM. Changeover Fan MONITOR Limit or HOT Relay* Relay Emergency SWITCH Safety Relay Switches 120 VAC 24 VAC. Compressor Aux Relay NEUTRAL Contactor (Stage 2) Hot 24 VAC 120 VAC. Neutral TWO COMMONS MUST. * Changeover Relay is energized in COOL when O/B switch is in the O position TRANSFORMER. BE JUMPERED TOGETHER! Changeover Relay is energized in HEAT when O/B switch is in the B position (Class II Current Limited). ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits NOTE. Polarity must be observed. If the HOT side of the second transformer is jumpered to the COMMON side of the first transformer a short will be made. Damage to equipment will occur when power is restored. THERMOSTAT. O/B Y G W2 E C L R.