A.O. Smith VF VB 1000 Service Handbook page 71

TECHNICAL SPECIFICATIONS
Ignition Timing:
Pre-Purge - cold start
Pre-Purge – not cold start
Shutter Adjust
Pre-Circulate
Igniter proving time
Inter-Purge
Post-Purge
Pump post-circulate time
Default User Settings/Ranges:
As shipped from the factory the SW1 dip switches (page 30) on the MCB are preset to the
appropriate values according to the system that was ordered, either VW or VB. The user
settings are also preset to the following default values:
VW MODELS
Oper Setpnt (Operating Setpoint)
Stage1 Diff (Operating Setpoint Differential)
Hi Limit (Automatic High Limit Setpoint)
Hi Limit Dif (Automatic High Limit Differential)
VB MODELS
Oper Setpnt (Operating Setpoint)
Stage1 Diff (Operating Setpoint Differential)
Hi Limit (Automatic High Limit Setpoint)
Hi Limit Dif (Automatic High Limit Differential)
BOTH MODELS
Tempert Units (Temperature Units)
Post Cir Secs (Post Circulation pump delay)
Netwrk Address (Network Address)
AOS WPC - Tech Training
VF BOILER SERVICE MANUAL
32 ± 2 seconds
10 ± 2 seconds
5 minutes
34 to 45 seconds or until flow is proven
18 ± 1 seconds
15 ± 2 seconds
25 ± 2 seconds
Selectable 45, 90, 180 seconds or continuous
Servicing should only be performed by a Qualified Service Agent
DEFAULT SETTING
145° F (63° C)
3° F (2° C)
210° F (99° C)
20° F (11° C)
DEFAULT SETTING
190° F (88° C)
3° F (2° C)
230° F (110° C)
20° F (11° C)
DEFAULT SETTING
°F
45 seconds
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ADJUSTABLE RANGE
70ºF to 190ºF
1° to 50°F
90ºF to 210ºF
1° to 50°F
ADJUSTABLE RANGE
70ºF to 220ºF
1° to 50°F
90ºF to 235ºF
1° to 50°F
ADJUSTABLE RANGE
°F or °C
45, 90, 180, Continuous
0 or 1 to 31 valid address
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