Specifications

Part number 550-142-120/0113
WM97+ gas-fired water boiler — Boiler Manual
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Menu/Item Units Low
Value
High
Value
Default Comment
TO RESET ALL HISTORY
COUNTERS TO ZERO:
To reset all history counters to zero: Enter the DIAGNOSTICS menu. Then press and hold the left
and right arrows located below the control display. Hold for 5 seconds. This will cause ALL history
to be deleted. To maintain history, reset counters individually.
Temperatures
Status
Tex t data Current operating status of the boiler. Prepurge, Ignition, Name of the system Type being
satisfied, post purge, Warm Weather Shutdown, Trouble
Boiler Out1
°F data Temperature of the first sensing element of the boiler’s heat exchanger outlet sensor
Boiler Out2
°F data Temperature of the second sensing element of the boiler’s heat exchanger outlet sensor
Boiler In1
°F data Temperature of the boiler’s heat exchanger inlet sensor
Flue1
°F data Temperature of the first sensing element of the boiler’s flue gas sensor
Flue2
°F data Temperature of the second sensing element of the boiler’s flue gas sensor
Outdoor
°F data Temperature of the remote outdoor air temperature sensor
CWH Tank Top
°F data Temperature at the top of the CHW tank
CWH Tank Bttm
°F data Temperature at the bottom of the CHW tank
Inputs
Status
Tex t data Current operating status of the boiler. Prepurge, Ignition, Name of the system Type being
satisfied, post purge, Warm Weather Shutdown, Trouble
Input 1
on-off data Call for heat status on Zone 1 Input (DHW input if DHW active)
Input 2
on-off data Call for heat status on Zone 2 Input
Input 3
on-off data Call for heat status on Zone 3 Input
Manual Limit
open-closed data External manual limit on low voltage terminal strip
Auto Limit
open-closed data External auto limit on low voltage terminal strip
Low Wtr Cutoff
open-closed data Low water cutoff device (inside boiler jacket)
Blower Tach
rpm data Feedback from blower sensor
Flame Signal
no units data Number indicating the presence and quality of the flame used to shutdown boiler
Outputs
Status
Tex t data Current operating status of the boiler. Prepurge, Ignition, Name of the system Type being
satisfied, post purge, Warm Weather Shutdown, Trouble
Gas Valve
on-off data Control’s gas valve circuit status
Boiler circulator
volts data Control’s variable voltage sent to control the boiler circulator speed —
0 V = OFF / 10 V = 100% = High speed
Circulator 1
on-off data Control’s circulator 1 relay status
Circulator 2
on-off data Control’s circulator 2 relay status
Circulator 3
on-off data Control’s circulator 3 relay status
Blower Signal
% of rate data Control’s signal controlling the blower speed
Alarm
on-off data Control’s alarm contact status
Errors
Control Fault
# 0 Displays number of control faults
Ignition Retries
# 0 Displays number of ignition attempts boiler is currently on
Manual Reset Cnt
# 0 Displays number of manual reset lockouts since last cleared
Auto Reset Cnt
# 0 Displays number of auto reset lockouts since last cleared
Lockout History 1
Choose this to view the most recent error recorded
Time & Date
text data Displays time and date that lockout occurred
Status
text data Displays what the status of the boiler at the time of the error
Manual Reset
yes or none data Choose this to view the details of manual reset lockouts
Auto Reset
yes or none data Choose this to view the details of auto reset lockouts
Inputs
menu menu Choose this to view the status of the Boiler Inputs at the time of the error
Outputs
menu menu Choose this to view the status of the Boiler Outputs at the time of the error
Temperatures
menu menu Choose this to view the Boiler Temperatures at the time of the error
Figure 94 DIAGNOSTICS menu details (see Figure 93, page 83 for access information)
DIAGNOSTICS menu (continued)