Universal Electronics 975 operating instructions Installation, C D E, L Ik M

MV 6 Y G W

C D E

H

O B RC RH

J

1	2		3	4	5
	W	RH	G	Y

MV W RH RC G Y O B 6

L

IK

M

1From heating system

2From 24 VAC transformer

3Red jumper wire (provided)

4Red jumper wire (provided)

5Red jumper wire (provided) See page 10 for letter identification.

NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is connected between thermostat’s RH and RC terminals for proper operation with this system.

NOTE: For three-wire heat only system, connect terminals G, W, and RH. For cool only system, connect terminals Y, G, and RH.

Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system

9

Installation