Bryant P/N TSTATBBP220-LA instruction manual II. Install Thermostat, Ð2Ð

II.INSTALL THERMOSTAT

WARNING: Before installing thermostat, turn off all power to the unit. There may be more than one power disconnect. Electrical shock can cause injury or death.

1.Turn off all power to unit.

2.If an existing thermostat is being replaced:

a.Remove existing thermostat from the wall.

b.Disconnect wires from existing thermostat. Do not allow wires to fall back into the wall. As each wire is disconnected, record wire color and terminal connection.

c.Discard or recycle old thermostat.

NOTE: Mercury is a hazardous waste and must be disposed of properly.

3.Remove the thermostat cover from wall plate (mount- ing base) to expose mounting holes. See Fig. 1. With the thermostat facing forward, press the back plate on the left hand side top corner to release the two prongs holding on the cover. Pull off the cover when the prongs have been disengaged.

4.Route thermostat wires through large hole in mount- ing base. Remove outer sheath from wires for added ¯exibility. Standard solid or multi-conductor thermo- stat wire should be used from the thermostat to the unit. Size and length considerations are as fol- lows: for a maximum distance from unit of 36 ft, use 22 AWG (American Wire Gage) wire; for a maxi- mum distance from unit of 100 ft, use 18 AWG wire.

5.Level mounting base against wall and mark wall through the 2 mounting holes in base.

6.Drill two 3¤16-in. mounting holes in wall where marked.

WARNING: Be careful not to drill into wiring in wall. Electrical shock could result.

Fig. 1 Ð Thermostat Mounting

7.Secure mounting base to wall with 2 screws and anchors provided. Ensure all wires exit through hole in mounting base.

8.Adjust wire length and routing to allow proper closure of the thermostat. Strip each wire at the end no more than 1¤4-in. to prevent adjacent wires from shorting to- gether. Match and connect wires to terminals on the thermostat. See Fig. 2-4 and Table 1.

CAUTION: Improper wiring or installation may cause damage to the thermostat. Check to ensure wiring is correct before proceeding with installation of unit.

9.Push excess wiring into wall. Seal hole in wall to pre- vent drafts.

10.Re-attach thermostat cover to back plate by aligning the top two prongs of the back plate in the vertical groove of the top cover and then snapping the cover onto the back plate.

11.Turn on power to unit. The thermostat will receive power from the unit. The thermostat will be powered by 24 v, nominal (18 to 30 vac). Terminals R (+ 24 v), W1/O/B (®rst stage heat or reversing valve), Y1 (®rst stage cool- ing), and G (fan relay) will always be connected. Some applications will use C (common), Y2 (second stage cool- ing), or W2 (second stage heating).

		LEGEND
W2	Ð Second-Stage	W1/O/B	Ð First-Stage Heat or
	Heat		Reversing Valve
Y2	Ð Second-Stage	Y1	Ð First-Stage Compressor
	Compressor	G	Ð Fan
RS2	Ð Not Used	W3/ECO	Ð Third-Stage Heat or
RS+5	Ð Not Used		Economizer (Not Used)
RS1	Ð Not Used	CK1	Ð Not Used
RS	Ð Not Used	CK2	Ð Not Used
GND		R	Ð 24 vac Transformer
		C	Ð 24 vac Transformer
			Common

Fig. 2 Ð Thermostat Wiring

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