Dr D
Dec 15, 2005, 07:13 PM
On my second try, following advice of AC guy and conforming to Honeywell diagram for "4-wire sgl stg HP (jumper intact), I have wired the HP to thermostat as follows: R=R+Rc; O=O; Y=Y+W; G=G; FUEL SWITCH set to E. Nothing works. On my first try I had R=R+Rc; G=G; Y=Y; C (Blue terminal) which should go to Common on tstat I put on B(Changeover in heat). FUEL SWITCH was on F. The fan came on but nothing else.
According to instructions and advice I now have correct connections. The HW book says: do not connect both O & B for sgl stg HP. The C from the HP is a Transformer Common according to HW book.
Could I have fried something on the tstat or the HP? Also I have left the main breaker turned on for the HP. The HP book says that will power Crancase heater to prevent harm at start-up. The AC guy here in sunny Phoenix said not to worry about it. Thanks for any sage advice;this is my first posting.
According to instructions and advice I now have correct connections. The HW book says: do not connect both O & B for sgl stg HP. The C from the HP is a Transformer Common according to HW book.
Could I have fried something on the tstat or the HP? Also I have left the main breaker turned on for the HP. The HP book says that will power Crancase heater to prevent harm at start-up. The AC guy here in sunny Phoenix said not to worry about it. Thanks for any sage advice;this is my first posting.