ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
CCB (CONT)
J7 Socket - Temperature Probe/ECO (immersion probe - top of the water heater)
PIN # | DESCRIPTION |
1ECO (energy cut out) 24 VAC out (red wire)
2Upper temperature probe (thermistor) +5.0 VDC (black wire)
3Upper temperature probe (thermistor)
4ECO (energy cut out) 24 VAC return (red wire)
J9 Port - Communication Port - Not Used |
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J10 | Socket - Not Used |
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J11 Port - Communication Port - Not Used |
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J13 | Socket - Blower Speed Control (VFD) |
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| PIN # | DESCRIPTION |
1Not used
2Not used
3To Blower low voltage PWM plug (see page 10) - pin #5 (white w/grn stripe)
4Not used
5Not used
6Not used
7To Blower low voltage PWM plug (see page 10) - pin #4 (white w/blue stripe)
8To Blower low voltage PWM plug (see page 10) - pin #1 (white w/brn stripe)
J15 Socket - Not Used
J16 Port - Communication Port - UIM Display (user interface module) S1 Dip Switch
The S1 dip switches are configured from the factory and should not be changed. The illustration below shows the 4 dip switches with labeling. Dip switches are toggle type micro switches. Flipping a dip switch towards “Open” would be the same as “Off.” Flipping a dip switch the other way (towards the switch numbers) is the same as “On.”
Dip switch #1 is used to configure the water heater to declare a fault condition and lock out after one or three failed trials for ignition. The factory setting is “on” for three trials.
Dip switches #2 and #3 are used when this control system is installed on other products. The factory setting for these two dip switches is “on.”
Dip switch #4 is a spare, configuration does not matter.
OFF
OPEN
| 1 Retry | 1 | 3 |
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| Retries |
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| ON | |
Ext | Use Yes | 2 3 | No | |
Input Type Tstat OPEN | Vent | CLOSED | ||
| Spare | 4 | Spare |
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Technical Literature Department | 38 of 52 | Ashland City, TN © 2008 |
Servicing should only be performed by a Qualified Service Agent |
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