Dogstar
12-29-2010, 01:46 PM
My air source heat pump system is running & costing a LOT more (i.e. double!) compared to our neighbours' homes of similar sizes with the same heat pump equipment. The HVAC contractor is unsure of problem, if any, so he replaced t-stat last week (with same model) just in case.
Ours is a 1 yr old home, 2700 sq ft [not including (heated) crawl space basement], 2 levels, family of 3. HP = Amana ASH130361; AH = Goodman ARUF364216 (with Goodman HKR-20CB 20KW heater kit); TSTAT = White-Rodgers 1F89-211.
There are three concerns I have identified thus far:
1. HP's W2 wire (white) is not connected, &
2. HP's Comfort Alert diagnostics module is indicating yellow “ALERT” flash code 7 (= open run circuit), &
3. HVAC contractor's use of HP normsrather than our system's specifics when I inquired about the pre-installation load sizing calculation, balance point, etc.
Current wiring connections are:
HP -> 4-wire to junction -> TSTAT 6-wire -> AH
(C) bl -> bk -> bk (C) -> bl (C)
(R) rd -> rd -> rd (R) -> rd (R)
(O) or -> gn -> or (O/B)
(Y) ye -> wh -> bl (Y)
(W2) wh -> nothing
wh (W2) -> wh (W2) & br (W3)
wh (E jumpered to W2)
gn (G) -> gn (G)
It appears that the HP connection should be 5-wire, not 4-wire, per its installation manual (for C, R, O, Y & W2). Could the HP's unconnected W2 wire be contributing to these &/or other system problems (i.e. long defrost cycles, high electricity usage, non-staged heat strips)? Or do you see something else I should double-check first?
Thank you for your input. Best wishes for the New Year!
Ours is a 1 yr old home, 2700 sq ft [not including (heated) crawl space basement], 2 levels, family of 3. HP = Amana ASH130361; AH = Goodman ARUF364216 (with Goodman HKR-20CB 20KW heater kit); TSTAT = White-Rodgers 1F89-211.
There are three concerns I have identified thus far:
1. HP's W2 wire (white) is not connected, &
2. HP's Comfort Alert diagnostics module is indicating yellow “ALERT” flash code 7 (= open run circuit), &
3. HVAC contractor's use of HP normsrather than our system's specifics when I inquired about the pre-installation load sizing calculation, balance point, etc.
Current wiring connections are:
HP -> 4-wire to junction -> TSTAT 6-wire -> AH
(C) bl -> bk -> bk (C) -> bl (C)
(R) rd -> rd -> rd (R) -> rd (R)
(O) or -> gn -> or (O/B)
(Y) ye -> wh -> bl (Y)
(W2) wh -> nothing
wh (W2) -> wh (W2) & br (W3)
wh (E jumpered to W2)
gn (G) -> gn (G)
It appears that the HP connection should be 5-wire, not 4-wire, per its installation manual (for C, R, O, Y & W2). Could the HP's unconnected W2 wire be contributing to these &/or other system problems (i.e. long defrost cycles, high electricity usage, non-staged heat strips)? Or do you see something else I should double-check first?
Thank you for your input. Best wishes for the New Year!