Honeywell CT1503 Owner's Manual - Page 11
For CT1503 750-millivolt heating
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CT1502, continued SINGLE STAGE HEAT PUMP (WITHOUT AUXILIARY HEAT) SYSTEM I- -1 For CT1503 750-millivolt heating Connect either wire to R terminal and the other wire to W terminal. Firmly tighten screws. 0Push excess wire back into wall, and plug hole in wall with nonflammable insulation to prevent drafts from affecting thermostat operation. 0 + L' (HOT) u+ A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOPD PROTECTION AS REQUIRED A IFCOMPRESSOR ISCONNECTEDTO OLDTHERMOSTATS "YTERMINALWITH A JUMPERTO"W, USE NEW THERMOSTATS "PTERMINALFORCOMPRESSOR. IFOLOTHERMOSTATHAS ONE WIRETO"Y"AND0NE TO " W . U S t ' Y AND " W ' O N NEW THERMOSTAT, DO NOT U S E " P . IMPORTaNT- IF OLD THERMOSTAT USES A W2 (AUXILIARY OR EMERGENCY HEAT) TERMINAL, THIS THERMOSTAT MAY NOT BE USED THIS THERMOSTAT IS NOT DESIGNED TO CONTROL AUXILIARY HEAT A SOMEHEATPUMPSUSE"B"INSTEAD0F"O' M211511 0Connect the wires to matching terminals on the subbase. Firmly tighten screws. 0Push excess wire back into wall, and plug hole in wall with nonflammable insulation to prevent drafts from affecting thermostat operation. M24IB 9 / 1 0 CQZOOA OR 0313A THERMOPILE 69-0273-9